JP5500906B2 - Fishing line and method for manufacturing fishing line - Google Patents

Description

In the present invention, the other metal element wire having a certain tensile breaking strength that has been machined is twisted around the outer periphery of one metal element wire having a high thermal conductivity, and then heat-treated (low-temperature heat treatment). By utilizing the property of high thermal conductivity of one metal strand, the tensile breaking strength of the other metal strand is further improved, the binding property with the needle as a fishing line is improved, fish teeth, The present invention relates to a fishing line that improves the shearing resistance of cutting with a rod and the like, and an assembly of a fishing line, a spinning reel, and a fishing rod, and a method for manufacturing the fishing line.

Various fishing line proposals have been made to improve fishing results in rivers and the sea.

Patent Document 1 discloses a fishing line in which metal fibers of polyolefin fibers are assembled to improve tensile strength, binding strength, and wear resistance. However, nothing is described about the characteristics of metal fibers and the characteristics of dissimilar metal twisted wires.

Patent Document 2 discloses a flexible fishing line that uses a polyethylene filament as a core material and eliminates slippage due to a braided structure made of a metal element wire such as tungsten and has less curling properties. However, there is no description about the characteristics of the metal fibers and the characteristics of the dissimilar metal twisted wires as described above.

Patent Document 3 discloses a fishing line in which a right-handed and left-handed so-called cross-shaped metal wire is wound around the outer periphery of a core wire to reduce resistance caused by water flow. However, when the fishing line is perpendicular to the water flow direction, an effect of improving the water breakage characteristic is observed. However, in an actual fishing spot, the case where the fishing line is always orthogonal to the water flow direction is extremely small, and in such a case, the water breakage characteristic effect is reduced.

JP-A-4-330241 Japanese Patent Laid-Open No. 64-13936 Japanese Patent No. 3616562

The present invention uses a plurality of austenitic stainless steel wires, which are other metal strands, on the outer periphery of one metal strand having high thermal conductivity and the like. Focusing on the tensile rupture strength characteristics due to the thermal effect of one metal wire, from the new technical idea that the tensile rupture strength of the other metal wire is highly enhanced by the heat conduction form during low-temperature heat treatment after the twisted structure An object of the present invention is to provide a fishing line and a manufacturing method thereof, and to provide a new technical idea for improving fishing results with improved water drainage characteristics by paying attention to a difference in flow velocity of water flow in a river or the sea.

According to the first aspect of the present invention, there is provided a core material made of a metal wire having a strand diameter of 0.008 mm to 0.120 mm, and a metal element having a strand diameter of 0.008 mm to 0.120 mm outside the core material. In a fishing line consisting of a resin-coated outer layer material on the outside of the side material, a side material in which a plurality of wires are twisted is provided, and the metal wire of the core material is more thermally conductive than the metal wire of the side material. The twisting configuration of the side material is such that a plurality of metal strands of the side material are twisted outside the core material, and the twisting direction is continuous with the longitudinal direction. The metal element wire of the side material is a solution formed by austenitic stainless steel wire, and is drawn and drawn at a low temperature heat treatment from 400 ° C. to 495 ° C. Or austenitic stainless steel in which the metal wire of the side material contains Mo In this case, a low temperature heat treatment at 400 ° C. to 525 ° C. is provided, and the wire drawing and the low temperature heat treatment are repeated as at least one set, and then the final wire drawing is provided, and the total area reduction ratio until the final wire drawing is determined. 95% to 99.5% or less, the total increase rate of the tensile breaking strength by the low-temperature heat treatment until the final wire drawing is 15% or more, the tensile breaking strength is 300 kgf / mm 2 or more, and the core material and the side After the material is twisted, the low-temperature heat treatment is performed at 180 ° C. to 300 ° C. by conduction heat, convection heat, or radiant heat at the time of resin film molding of the outer layer material, and the side material includes the core material and the side material The tensile rupture force is increased more than the tensile rupture force of the outer layer material before molding of the resin film by the sandwich thermal form by low-temperature heat treatment from the outside.
With this configuration, the high thermal conductivity characteristics of the core material during low-temperature heat treatment are used to further improve the tensile fracture strength of the austenitic stainless steel wire that has been subjected to strong processing of the side material, and a metal having high tensile fracture strength characteristics. A fishing line made of strands can be obtained.

The invention according to claim 2 is provided by providing a core material and a side material formed by twisting a plurality of dissimilar metal strands having a strand diameter of 0.008 mm to 0.120 mm on the outside of the core material. In the fishing line composed of an outer layer material with a resin coating on the outside of the material, the core material is composed of low-stretch high-strength resin fibers having a fineness of 28 to 440 dtex, and the twisted configuration of the dissimilar metal strands of the side material is as described above. Dissimilar metal strands are adjacently contacted to form a twisted configuration in which the twisting direction is continuously wound in one direction with respect to the longitudinal direction, and one of the metal strands is more than the other metal strand The other of the metal strands having a thermal conductivity of 5 times or more is provided with a low temperature heat treatment of 400 ° C. to 495 ° C. after wire drawing and wire drawing using a solidified austenitic stainless steel wire, Or the austenitic stainless steel in which the other metal strand contains Mo In the case of a stainless steel wire, a low temperature heat treatment at 400 ° C. to 525 ° C. is provided, and the wire drawing and the low temperature heat treatment are repeated as at least one set, and then the final wire drawing is provided. The area ratio is 95% to 99.5% or less, the total increase rate of the tensile breaking strength by the low-temperature heat treatment until the final wire drawing is 15% or more, the tensile breaking strength is 300 kgf / mm 2 or more, and the core material And the side material are twisted, and then subjected to low-temperature heat treatment at 180 ° C. to 300 ° C. by conduction heat, convection heat, or radiant heat at the time of resin film molding of the outer layer material, The other is that the tensile strength at the time of the outer layer material before the resin coating is formed by the adjacent contact form between the outer side of the outer layer material by the low temperature heat treatment at the time of molding the resin coating and the one metal wire having high thermal conductivity. It is characterized by being increased more than the breaking force.
With this configuration, the tensile strength at break is further improved by utilizing the high heat conduction characteristics of one metal strand during low-temperature heat treatment, and the other metal strand, which is an austenitic stainless steel wire having a high tensile fracture strength property, is obtained. The fishing line can be obtained which can be bound with the same needle as the synthetic resin monofilament while using a twisted wire of different metal strands and has improved curl resistance due to rubbing.

In the invention according to claim 3 or claim 4, the metal wire of the core material according to claim 1 or one of the different metal wires of the side material according to claim 2 is a tungsten wire or an alkali metal. Or a doped tungsten wire to which at least one of aluminum, potassium and rhenium is added.
With this configuration, a metal wire with high thermal conductivity is obtained, and further by adding a doping material, the grain boundary strengthening and the dispersive strengthening effect have high tensile rupture strength while having a small diameter and improved creep characteristics. A fishing line made of a twisted wire of metal strands can be obtained.

The invention according to claim 5 or claim 6 is an austenitic system in which the metal strand of the side member according to claim 1 or the other dissimilar metal strand of the side member according to claim 2 is subjected to a solution treatment. Using a stainless steel wire, the tensile breaking strength is 340 kgf / mm 2 or more by strong processing.
With this configuration, the other highly austenitic stainless steel wire is obtained, and during the low-temperature heat treatment, the thermal conductivity of one metal wire having high thermal conductivity is utilized to pull the other metal wire. A fishing line with improved tensile strength can be obtained by improving the breaking strength.

The invention according to claim 7 is the fishing line according to any one of claims 1 or 3, wherein the twisted configuration of the metal wires of the core material and the side material is the metal wire of the core material. In one embodiment, the metal element wire of the side member is composed of 7 to 8 spiral ropes.
With this configuration, it is possible to obtain a fishing line of a dissimilar metal strand twisted configuration having a high tensile breaking force in consideration of the spring index and flexibility of the twisted wire outside the dissimilar metal strand twisted configuration.

The invention according to claim 8 is the method for manufacturing a fishing line according to claim 1, in which a metal wire having a high thermal conductivity and a high relative density is clearly shown.
With this configuration, a core wire having high tensile fracture strength characteristics and high thermal conductivity with a strand diameter of 0.008 mm to 0.120 mm is obtained, and twisting of dissimilar metal strands between the core material and the side material is obtained. During the subsequent low-temperature heat treatment, the high thermal conductivity characteristics of the core material are used to further improve the tensile fracture strength characteristics of the austenitic stainless steel wire of the hard-worked side material, thereby dissimilar metal elements having high strength tensile fracture strength characteristics. A fishing line consisting of a twisted configuration of wires can be produced.

Front view, cross-sectional view (Examples 1 to 5) and other example cross-sectional views of the fishing line 1 Front view and cross-sectional view of fishing line 2 (Example 6) Front view and cross-sectional view of fishing line 2 (Example 7) Front view and cross-sectional view of fishing line 2 (Examples 8 to 10) Bundling state diagram of fishing line 2 and fluorocarbon line Friend fishing state diagram Friend fishing state diagram of the carp (Examples 8 to 10), and a discontinuous surface explanatory diagram of the speed Sea bream fishing Assembly drawing of fishing line and spinning reel Explanatory drawing of assembly of fishing line 2, needle, fish, and reel and through rod Temperature and tensile strength characteristics Tensile / elongation characteristic diagram of fishing line 2 Thermal conductivity and heat conduction distance 1 twisted structure of fishing line and tensile breaking force

An embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an embodiment of the present invention, FIG. 1 (A) shows a fishing line 1, and the fishing line 1A of Example 1 includes a core 5A of a single metal strand having a strand diameter of 0.026 mm, A side material 6 composed of eight metal strands having a wire diameter of 0.015 mm is twisted on the outside of the core material 5A, and the twisting direction is continuous with respect to the longitudinal direction in a one-way spiral shape. 1 × 9 (8 side members on the outside of one core material) of a spiral rope twist configuration, and the outer diameter of the rope after twisting is 0. The rope pitch (P in the figure) at 056 mm is 2.5 to 15 times the outer diameter of the rope, and the outer side of the side member 6 is covered with the outer layer material 7 of the synthetic resin coating, and the outer diameter after coating is 0.061 mm. .
Here, the spiral rope refers to a rope formed by twisting three or more strands to form a strand (bundle), and the name is (1 × n), and n indicates the number of strands.

1 (B) to 1 (D) show the fishing line 1B of Examples 2 to 5 in which the strand diameter of the core material 5A and the strand diameter of the side member 6 are different from those of the fishing line 1A of Example 1 described above. 1E is shown and Table 1 shows the specifications. The fishing line 1C is not shown because it has the same twisting structure as the fishing line 1B.

As the material of the outer layer material 7 of the synthetic resin coating, extrusion molding, dipping method or the like using polyamide such as nylon 6 or nylon 12 or thermoplastic resin such as polyethylene or polyurethane, or epoxy resin, polyimide, polyamideimide The core material 5A and the side material 6 are hermetically encapsulated with a resin film by a dipping method using a thermosetting resin such as (a method of passing through a molten resin layer and curing by heating).

And the metal strand used for 5 A of core materials is a metal material which has a heat conductivity 5 times or more than the austenitic stainless steel wire of the side material 6 mentioned later, Preferably it is a metal material which has a heat conductivity 7 times or more. is there. Specifically, the thermal conductivity k (W · m−1 · K-1) near room temperature is 83 to 94 and is about 5.0 to about 6.3 times that of the side material (austenitic stainless steel wire of the side material). Is an alloy material (for example, Ni-Ti alloy material) containing 45% or more of Ni component of 15 to 16.5), and similarly has a thermal conductivity k of 236 to 240 and about 13.9 to about 16 times that of the side material. It is an aluminum wire or a tungsten wire or a tungsten alloy wire having a thermal conductivity k of 163 to 177 and about 9.9 to about 11.8 times that of the side material. Copper wires and silver wires also have high thermal conductivity, but are not preferable from the viewpoint of tensile strength at break and cost.
The most preferable is a tungsten wire or a tungsten alloy wire, and the tungsten alloy wire is a doped tungsten wire in which 200 ppm or less of an alkali metal is added to tungsten, or a doped tungsten wire in which at least one kind of aluminum and rhenium is added to 200 ppm or less. is there.
The reason for this is that the doped tungsten wire added with potassium, which is an alkali metal, improves the tensile rupture strength by the grain boundary strengthening action and the dispersion strengthening action by potassium, and improves the creep strength by the recrystallization suppressing effect. Because it can.

The tungsten wire or the doped tungsten wire has a relative density of 99% or more (pore volume ratio is 1% or less), preferably 99.4% or more (pore volume ratio is 0.6% or less). A wire obtained by drawing a sintered body or a dope tongue ten sintered body after swaging is preferable.
The reason for this is that, by swaging, the metal structure is aligned in the same direction to improve the tensile fracture strength, and when the pore volume ratio in the metal structure exceeds 1%, the strand diameter used in the present invention is 0.008 mm. In the wire drawing of 0.120mm ultrafine wire, the pores appear on the surface of the wire during the wire drawing and become notched, and this often causes wire breakage, which hinders productivity and reduces tensile strength. This is because it is not possible to obtain an ultrafine wire having a stable quality having a high tensile breaking strength of 350 kgf / mm @ 2 to 400 kgf / mm @ 2 at 300 kgf / mm @ 2 or more.

The reason why the core material 5A is a metal strand having a thermal conductivity of 5 times or more, preferably 7 times or more of the austenitic stainless steel wire of the side material 6 is that The core material exists in the center of the twisted structure by heating at the time of resin film molding of the outer layer material after twisting the core material and the side material after twisting the core material and the side material. The temperature of the side material is higher than the temperature of the side material in the longitudinal direction, and it becomes the side of strong processing by being a low temperature heat treatment in the form of sandwich heat between the heating means from the outside of the side material and the increased temperature of the core material The effect which raises the tensile breaking strength improvement effect of a material was discovered. Details will be described later. The core material is a straight shape unlike the coil-shaped side material, which is a preferred method of using a tungsten wire that is weak against twisting.

Next, the metal strand used for the side material 6 is a solidified austenitic stainless steel wire, and after repeating the wire drawing and low temperature heat treatment steps, a final wire drawing step is provided. It is characterized by performing wire drawing with a total area reduction of 95% to 99.5% or less.
The side member 6 uses a metal strand having a strand diameter of 0.008 mm to 0.120 mm. Here, the total area reduction ratio means a reduction ratio indicating a difference in cross-sectional area between the wire diameter of the solid solution processed wire and the final finished wire diameter in the wire drawing process. . The reason why the total area reduction is 95% or more and 99.5% or less is that the tensile strength at break is 300 kgf / mm 2 or more. When the total area reduction exceeds 99.5%, It is because the embrittlement is severe when the void starts to be formed, and the breakage is likely to occur during the stranded wire.

And, the reason for “drawing the solid solution treated austenitic stainless steel wire” was to obtain an austenitic structure with good workability, and the austenitic stainless steel wire was obtained by heat treatment using a transformation point. This is because the crystal grains cannot be refined, and the crystal grains can be refined only by cold working, and the tensile fracture strength can be improved by exhibiting remarkable work hardenability by wire drawing. The reason for using austenitic stainless steel wire is that martensitic stainless steel wire exhibits quench hardenability by heat treatment and is easily affected by heat, and ferritic stainless steel wire is temperature brittle (sigma brittle, 475 ° C brittle) In addition, it is possible to obtain a metal strand having high tensile strength at break using a commercially available metal material without using an expensive metal material having a complicated metal structure. Because you can.

Here, Tables 2 and 3 show that the strand diameter of the side member 6 of the present invention is 0.008 mm to 0.120 mm (in the present Examples 2 and 5, 0.014 mm and 0.016 mm, respectively, 10 shows a manufacturing process for obtaining a metal strand having a high strength tensile breaking strength characteristic of 0.03 mm and 0.04 mm, respectively, and a tensile breaking strength characteristic for each process.
This is a temperature after primary wire drawing at a predetermined area reduction rate using a wire rod (bus wire) having a tensile breaking strength of 74 kgf / mm @ 2 to 79 kgf / mm @ 2 of a solidified austenitic stainless steel wire (SUS304 material in this embodiment). A primary low-temperature heat treatment (450 ° C., 30 minutes in this embodiment) is performed by hot air circulation atmosphere heating using a heat treatment furnace at a temperature range of 400 ° C. to 525 ° C. for 10 minutes to 180 minutes, and then secondary at a predetermined area reduction rate. The wire is drawn and, similarly to the above, a secondary low-temperature heat treatment (450 ° C., 30 minutes in this embodiment) is performed by atmospheric heating using a heat treatment furnace at a temperature range of 400 ° C. to 525 ° C. for 10 minutes to 180 minutes, and then predetermined By performing the third wire drawing at a surface reduction ratio of, a metal strand having a predetermined strand diameter can be obtained.
Here, the tensile breaking strength refers to a value obtained by dividing a value obtained by applying a tensile force to a metal strand and dividing the value by the cross-sectional area of the metal strand.

Here, the numbers in circles in the table are shown by numbers in parentheses.
According to Tables 2 and 3, the rate of increase in tensile fracture strength (1) due to the primary low-temperature heat treatment after the primary wire drawing was 14.8% to 21.1%, respectively. Moreover, the increase rate (2) of the tensile fracture strength by the secondary low-temperature heat treatment after the secondary wire drawing was 9.5% to 11.9%, respectively, and each showed an increase rate of 5% or more. The total increase rate (1) + (2) due to the low-temperature heat treatment is from 24.3% to 33.0%, respectively, indicating an increase rate of 20% or more.
The tensile breaking strength after the final wire drawing step (third wire drawing in this embodiment) was 343 kgf / mm 2 to 402 kgf / mm 2, respectively, exceeding 300 kgf / mm 2 and showing a value of 340 kgf / mm 2 or more. ing.

Here, the area reduction rate in the primary wire drawing step is 80% to 95%, and 90% to 96% in order to obtain higher tensile strength at break (in this example, 92.6% to 95.4). In addition, the area reduction rate in the secondary wire drawing step is 40% to 79%, and in order to obtain higher tensile fracture strength characteristics, it is 50% to 89% (in this example, 55.6% to 75%). ), The area reduction rate of the primary wire drawing process is set higher than the area reduction rate of the secondary wire drawing process, and the total area reduction rate until the final wire drawing process (third wire drawing in this embodiment) is 95% or more. In order to obtain 99.5% or less and to obtain higher tensile strength at break, the content is set to 97% or more and 99.5% or less. (In this example, 98.4% to 99.5%)

And if supplementary, the area reduction rate in each process of the primary wire drawing process and the secondary and tertiary wire drawing processes may be set higher, but the area reduction rate of the primary wire drawing process before the primary low-temperature heat treatment Is set high (in this example, 92.6% to 95.4%), the amount of processing-induced martensite can be increased to suppress the growth of crystal grains by heat treatment, and the crystal grain size can be reduced. .
Moreover, it is desirable to set the area reduction rate in the primary wire drawing process high from the viewpoints of economy and productivity, and to set the subsequent wire drawing process lower than that. In addition, in order to further enhance the effect of improving the tensile breaking strength due to the formation of work-induced martensite, the surface temperature of the metal strand during wire drawing is desirably 140 ° C. or lower, and the setting of a cooling lubricant in wet wire drawing or wire drawing This can be achieved by setting the lubricating liquid sprayed to the die at the time and setting the temperature of the lubricating liquid. For example, the temperature of the lubricating liquid in the case of wet drawing is preferably 28 to 42 ° C. in order to maintain the surface temperature of the metal wire.

In addition, the reason why the temperature range of the primary and secondary low-temperature heat treatments was 400 to 525 ° C. for 10 to 180 minutes (450 ° C. and 30 minutes in this embodiment) is that an austenitic stainless steel wire, such as SUS304, described later. This is because the tensile rupture strength characteristics (FIG. 11) depending on the temperature in the strong work drawing of the SUS316 material and the SUS316 material, the productivity by the atmosphere heating using the heat treatment furnace, and the stability of the quality were taken into consideration. From FIG. 11, the SUS316 material (B in the figure), which is an austenitic stainless steel wire containing Mo, shows the same tendency as the SUS304 material (in the figure B) on the low temperature side, but about 30 more than the SUS304 material on the high temperature side. The higher the temperature, the higher the tensile strength at break.
And although a wire drawing process and a low-temperature heat treatment process may be repeated 5 sets or more as 1 set, 3 sets or less are desirable from the viewpoint of economy and productivity. The reason why the low temperature heat treatment process is not provided after the final wire drawing process (after the tertiary wire drawing process in the present embodiment) at the metal wire stage is that the tensile fracture strength is Although it is increased, the elongation is extremely insufficient due to strong work drawing, and therefore, when twisting using a plurality of the above-mentioned metal strands, it is easy to cause disconnection of the metal strands, and it is necessary to prevent this. It is.
This is considered to be a peculiar phenomenon in the case of twisting metal strands having a total area reduction of more than 95%. The low temperature heat treatment after twisting will be described later.

2 and 3 show the fishing line 2 of the present invention. In the fishing line 2A (FIG. 2) of the sixth embodiment, the core material 5B is a resin fiber, and the outer side member 61 is the first embodiment. Similarly to the core material 5A to 5A, a metal material having a thermal conductivity of 5 times or more, preferably 7 times or more that of the austenitic stainless steel wire of the side material 62 is used. In the sixth embodiment, six doped tungsten wires having a strand diameter of 0.016 mm are used. And the side material 62 uses the austenitic stainless steel wire of the strong process similar to the side material 6 of the said Examples 1-5, and the said metal material wire with the said 6 metal strands with a strand diameter of 0.016 mm, and the said side material After the winding formation, each of the 61 metal strands is in a twisted configuration in which each of the metal strands is adjacently contacted, and the twisting direction is continuously spiraled in one direction with respect to the longitudinal direction. The rope pitch, which is the pitch of the metal strands, is 2.5 to 15 times the outer diameter after winding forming as described above, and is coated with the outer layer material 7 of the synthetic resin coating on the outside of the side members 61 and 62, The outer diameter after the resin coating is 0.084 mm. In addition, the side members 61 and 62 are adjacent to each other in parallel with each other, in addition to the twisted structure in which the side members 61 are alternately adjacently contacted with each other. It is good also as a twisted structure.

Here, as the resin fiber of the core material 5B, a low elongation high strength resin fiber is used, which means a resin fiber exhibiting elongation close to that of a metal wire, and specifically obtained by liquid crystal spinning or gel spinning. Kevlar (registered trademark: made by DuPont) yarn made of aramid resin, Vectran (registered trademark: made by Kuraray) yarn made of polyarylate resin, Dyneema made of polyethylene resin (
Registered trademark: manufactured by Toyobo Co., Ltd.), xylon (made by Toyobo Co., Ltd.) yarn made of polyparaphenylenebenzoxazole resin. The core material 5B has a fineness of 28 to 440d.
Use low-strength, high-strength resin fibers of tex. This is because the low elongation and high tensile fracture strength allow the diameter to be reduced, and the outer diameter is 0.3 mm (No. 3) or less fishing rod (generally No. 1 to 3), especially the outer diameter. The diameter can be reduced to 0.074 mm (No. 0.2) or less, for example, a fishing line (generally 0.04 to 0.2) with an outer diameter of 0.037 mm (No. 0.05). Because it becomes. The material of the outer layer material 7 is the same as in the first to fifth embodiments.

Next, FIG. 3 shows the fishing line 2B of the seventh embodiment. The difference from the sixth embodiment is that the twisted structure (the fishing line of the fourth embodiment) has the missing portion 8 in which the metal wires of the side members 61 and 62 are missing. In 2B, the number of the metal strands of the side member is 9 for one fishing line 2A with one side member 61 and two side members 62 for a total of three. Next, FIG. 4 shows the fishing line 2C of the eighth embodiment. The difference from the seventh embodiment is that the dimensional difference between the maximum outer diameter and the minimum outer diameter after the resin coating of the uneven strip 11 of the outer layer material 7 described later is a metal element. That is at least 20% of the wire diameter.
FIG. 4B shows fishing lines 2D and 2E of Examples 9 and 10 having different metal strand diameters. The difference from Example 8 is the same as that of the side member 61 having a different side strand diameter. A metal strand of a thin wire 62B of the same material as that of the side material 62 is twisted on both sides of a thick material side material 61A, and the side material 61A has a strand diameter of 0.04 mm and one side material. A combination of a large diameter wire and a thin diameter wire with a strand diameter of 62B of 0.03 mm2 is the fishing line 2D of Example 9, and similarly, the strand diameter is 0.06 mm1 and the strand diameter is 0.04 mm2. A combination of a large diameter wire made of the same material as the side material 61 and a thin wire made of the same material as the side material 62 is defined as a fishing line 2E of Example 10.

In all of Examples 8 to 10, the metal wires are in contact with each other in a form in which the uneven stripes of the metal wires are raised on the outer surface after the resin coating, that is, by the twisted configuration of the plurality of metal wires. Convex and concave ridges 11 formed by the concave and convex ridges 9 and the concave groove portions 10 lacking metal wires are continuously spirally wound along the longitudinal direction.
And when the outer diameter dimension of Example 8 is demonstrated using FIG. 4 (A), the maximum outer diameter (illustration D1) after winding of a metal strand and the outer diameter (illustration d1) of the core material 5B are respectively shown. The maximum outer diameter (D2 in the drawing) and the minimum outer diameter (d2 in the drawing) of the uneven strip 11 after the resin coating are 0.200 mm and 0.186 mm, respectively, and the difference between D2 and d2 is 0.175 mm and 0.115 mm. Is 0.014 mm, and the uneven stripe 11 after the resin coating has a structure having this step size.
The dimensional difference between the maximum outer diameter and the minimum outer diameter after the resin coating is 35% of the large-diameter wire diameter (0.04 mm). In order to generate a spiral vortex described later, at least 20 of the metal wire diameter. % Or more, more preferably 30% or more, and this maximum dimensional difference is approximately twice the diameter of the large diameter wire.
And the film thickness of the resin film of a metal strand part is 0.0125 mm.

And Examples 1, 2, 5, 9, and 9 of fishing lines in which the strands of the side wires are twisted using metal strands of 0.015 mm, 0.016 mm, 0.014 mm, 0.03 mm, 0.04 mm, 10 will be described.

Table 4 shows that the outer layer material 7 before Examples 1, 2, 5, 9, and 10 before forming a resin film (each example is 1A, 2A, 5A, 9A, and 10A) is 180 ° C. to 300 ° C. 10% to 60 minutes at 200 ° C. (in this example, 200 ° C., 5 minutes) shows the rate of increase (%) in tensile rupture force when subjected to low-temperature heat treatment by atmospheric heating, and Table 4 shows the resin coating of the outer layer material 7 Examples 1, 2, 5, 9, and 10 in which molding has been performed are shown, and heat at the time of resin film molding is used, that is, conduction heat by molten resin at the time of extrusion molding, or coating at the time of coating film molding by the dipping method Utilizing convection heat, radiant heat for drying the membrane resin, preheating after twisting of the metal wire described later, etc., from 180 ° C. to 300 ° C. for 10 seconds to 60 minutes (in this embodiment, 200 ° C., 30 minutes Second) shows the rate of increase (%) in tensile rupture force when low-temperature heat treatment is performed. Here, the tensile breaking force means a value when the fishing line is broken by applying a tensile force. In Table 5, the outer diameters of Examples 9 and 10 indicate the maximum value and the minimum value.

According to Table 4, when a low-temperature heat treatment is applied to a doped tungsten wire having a high thermal conductivity and a strongly processed austenitic stainless steel wire having a total area reduction ratio of 95% or more in a contiguous contact configuration, tensile fracture The force increases, and the rate of increase increases from 7.6% to 12.6%, all exceeding 5%, and in Examples 1, 2, and 5 from 12.1% to 12.6%. Can be increased by 10% or more. Further, according to Table 5, the heat utilization at the time of molding the resin film which is the outer layer material 7, that is, the utilization of the conduction heat by the molten resin at the time of extrusion molding, or the coating resin drying at the time of film coating by the dipping method The tensile breaking force can be increased by heat treatment (low temperature heat treatment) using convection heat, radiant heat, preheating after twisting of the metal strands, and the rate of increase is from 11.2% to 14.0% Thus, both exceed 10%, and in Examples 1, 2, and 5, from 12.9% to 14.0%, it can be increased by approximately 13% or more.
Thus, a tungsten wire or a doped tungsten wire having a thermal conductivity k (W · m−1 · K-1) of 163 to 177 and 9 times or more of an austenitic stainless steel wire (k is 15 to 16.5) is used. By using a twisted structure in which a high-strength austenitic stainless steel wire having a total area reduction rate of 95% to 99.5% or less is adjacently contacted, a resin film is formed on the outer layer material 7 after being twisted. It was found that the tensile breaking force was increased at a high value by low-temperature heat treatment using heat, convection heat, or radiant heat.

Next, the difference in the distance of heat conduction in the longitudinal direction at the same temperature due to the difference in thermal conductivity will be described. FIG. 13 shows a tungsten wire (shown in the figure) having a thermal conductivity k (W · m−1 · K-1) of 163 to 177, a nickel wire (shown in the figure) having a thermal conductivity k of 83 to 94, and a thermal conductivity. When one end is heated to 300 ° C. using an austenitic stainless steel wire (illustrated c) having a rate k of 15 to 16.5, the temperature in the longitudinal direction is measured at a fixed point and compared in a logarithmic graph. The wire diameters were compared using a 2 mm wire in consideration of the measuring instrument dimensions.

According to FIG. 13, when the temperature of the fixed point measurement is 50 ° C., the nickel wire is at the same temperature up to a position about 2.5 times longer than the austenitic stainless steel wire, and the tungsten wire is about 4 times longer. It is the same temperature up to this position. Similarly, at 40 ° C., the temperature is the same up to a position that is about 3.2 times as long as the nickel wire and 5.3 times as long as the tungsten wire.
This is because, for example, when the heating temperature at the time of forming the resin film of the outer layer material 7 is 300 ° C., the tungsten wire is several times longer than the austenitic stainless steel wire (in the above result, about 3.2 times to about 5.3 times). If the heat capacity of the ultrafine wire of the present invention is taken into consideration, it is considered that the same temperature is reached at a long distance of a numerical value greatly exceeding the above.
And, for example, in Examples 1 to 5, the strongly processed austenitic stainless steel wire that is the side material is a tungsten wire of the core material that is present inside the side material by heating during the resin film molding of the outer layer material, and the side A low temperature heat treatment state of a sandwich heat form by heating from the outside of the material, and in Examples 6 to 10, a low temperature heat treatment form by heating from the outside of the side wire and the tungsten wire adjacent to the austenitic stainless steel wire It becomes. Accordingly, a fishing line having a high tensile breaking force as shown in Table 5 can be obtained. The thermal conductivity k (W · m −1 · K −1) for exhibiting the remarkable tensile breaking force is at least 5 times that of an austenitic stainless steel wire (b in the figure is about 5.0 to about 6). .3 times) is preferable, more preferably 7 times or more, and most preferably 9 times or more (the figure A is about 9.9 times to about 11.8 times).

Here, in the present invention, as shown in Tables 2 and 3 at the stage of each metal strand and Tables 4 and 5 at the stage of fishing line obtained by twisting each metal strand, the austenitic stainless steel of the side material is used. In the final process of a hard-worked metal wire with a total area reduction ratio exceeding 95% in the wire, the low-temperature heat treatment is not performed but the final wire drawing process is performed, and the low-temperature heat treatment is performed after twisting the metal wire. Thereby, the tensile breaking force as a fishing line can be increased. The reason for this is that the austenitic stainless steel wire of the side material is a metal wire having a strong work drawing with a total area reduction exceeding 95% (in this embodiment, the total area reduction is 98.4% to 99.5%). If the same low-temperature heat treatment is applied, the tensile strength at break increases, but breakage occurs when the plurality of metal strands are twisted due to insufficient elongation, making it difficult to form a twisted configuration with dissimilar metal strands. is there. Therefore, the austenitic stainless steel wire of the side material is not subjected to low-temperature heat treatment after the final wire drawing step until the final wire drawing step having a predetermined total area reduction rate at the stage of the metal wire, and thereafter a plurality of the above metal element wires. After twisting the wires, by applying a low temperature heat treatment as shown in Tables 4 and 5, disconnection at the time of twisting with the dissimilar metal strands can be prevented and the tensile breaking force can be further increased.
And, as shown in Table 5, the tensile breaking force is further reduced by low-temperature heat treatment from 180 ° C. to 300 ° C. using conduction heat, convection heat, radiant heat, etc. due to molten resin at the time of resin film molding of the outer layer material 7 Can be increased.

The reason for this is that, as described above, the core material inside the side material having a thermal conductivity of 5 times or more than that of the side material, and the low temperature heat treatment in the form of sandwich heat by heating from the outside of the side material, or the austenite of the side material Tensile rupture force can be further increased by a low-temperature heat treatment mode by heating adjacently to a metal wire having a thermal conductivity 5 times or more than that of a stainless steel wire and heating from the outside of the side material.
Further, as can be seen from the relationship between the temperature and the tensile strength at break in FIG. 11 described later, the tensile strength at the austenitic stainless steel wire begins to increase even at a low temperature of 180 ° C.
And in the ultrafine wire of the metal element wire of the side member 6, the heat capacity is small and easily affected by heat, and the heat conduction by the molten resin at the time of extrusion molding of the resin film, or the coating film resin at the time of coating film formation by the dipping method Receiving convection heat, radiant heat, etc. for drying, and heat radiation in a sealed state by the resin coating of the outer layer material, heat treatment (heat treatment by low temperature heat treatment) effect of the heat retention and heat, and the high thermal conductivity This is because it can be considered as a combined effect with the specific action by the twisted configuration with the metal strands.

And, the low temperature heat treatment temperature range of the heat treatment is set to 180 ° C. to 300 ° C. because the tensile fracture strength characteristics depending on the temperature of the austenitic stainless steel wire described later (FIG. 11) and the melting of the synthetic resin at the time of resin film molding Considering the temperature, the heat capacity of the austenitic stainless steel wire by the ultrafine wire, the heat retention effect in the sealed state by the resin film molding, and the specific action by the twisted configuration with the metal wire having the above high thermal conductivity It is. Moreover, the heating time was set to within 10 minutes from 60 seconds. If the heating time was less than 10 seconds, the effect of improving the tensile fracture strength could not be obtained. This is because of such considerations. The heating time includes a resin film forming time and a time having a heat retaining effect after the forming process. Also, at the time of resin film molding processing, for example, before introducing the twisted wire of dissimilar metal wires into the extruder for forming the resin film, the residual strain is removed after twisting of dissimilar metal wires in conjunction with the extruder. And a heating time for heating through a heat treatment furnace for obtaining linearity (generally referred to as preheating) is also included. Therefore, the “low temperature heat treatment at the time of forming the resin film of the outer layer material” here means to include the preliminary heating.

Next, the twisting configuration and working effects of Examples 1 to 5, particularly Examples 1 to 3 will be described.
FIG. 14 shows the strand diameter and the number of strands when the strand diameter of the core material is increased from 0.020 mm to every 0.002 mm with the same outer diameter after twisting in the twisted configuration of the fishing line 1. Is a graph showing the twisted structure and tensile breaking force of the core material and the side material, and the twisted structures of Examples 1 to 5 before the resin film molding of the outer layer material 7 are shown in FIGS.

According to FIG. 14, since the outer diameters after twisting are the same, the strand diameter of the side member decreases with the increase in the strand diameter of the core material, and the number of wires increases and the tensile breaking force increases. However, when the number of side members increases from the twisted configuration 1 × 11, the tensile breaking force tends to be saturated.
In the twisted configurations of Examples 2 and 3 (B and C in the figure), the twisted configurations are established when the core wire diameter is 0.022 mm and 0.024 mm. It was found that the twisted configuration shown in 3 and the twisted configuration shown in Example 1 had substantially the same tensile breaking force.
The reason for this is that when the strand diameter of the core material of the third embodiment is 0.022 mm, the coil center diameter D of the side material passing through the center of the strand cross section of the side material (FIG. 1 (A )) Is approximately 0.1225 mm {(0.022 + 0.017) × π}, and the calculated value of the number of metal strands of the side material is approximately 7.2 (0.1225 / 0.017). The required number is 7, and the cross-sectional area is larger than that of the twisted configuration illustrated in Example 2 and is considered to be a twisted configuration that is substantially the same as the cross-sectional area of the twisted configuration illustrated in Example 1. It is.

And the preferable twisting structure of the core material and the side material of the fishing line 1 is 1 × 7, 1 × 8, 1 × 9, 1 × 10, and most preferable are 1 × 8 and 1 × 9.
The reason for this is that in the case of the 1 × 6 twisted configuration in FIG. 14, the core wire diameter is 0.016 mm, the side wire diameter is 0.020 mm, and the required number is five. In this case, the spring index of the ratio of the coil center diameter of the side material to the strand diameter of the side material is 1.80 {(0.016 + 0.020) /0.020}. At the time of the winding forming, the metal wire of the side material is deformed into an ellipse, wound or broken, and the winding forming process becomes difficult.
On the other hand, the spring index of Example 4 having a twisted configuration of 1 × 7 is about 2.11 {(0.020 + 0.018) /0.018}, and the twisted configuration is 1 × 7 to 1 × 10. This is because all of the examples have a spring index of 2 or more and can be wound.
When the twisted configuration is 1 × 11, the strand diameter of the core material is 0.030 mm, the strand diameter of the side material is 0.013 mm, and the core material is about 2.3 times the strand diameter of the side material. A double-diameter line is used to inhibit flexibility and reduce the binding force with a fishing line to be described later. The ratio (da / db) of the strand diameter (da) of the core material to the strand diameter (db) of the side material is preferably 0.09 to 2.0, more preferably 1.20 to 1.80. It is. In addition, if supplemented, the most preferable twisted configuration is about 1.73, 1.50, and about 1.29 in Examples 1 to 3 of 1 × 8 and 1 × 9, respectively, within the above numerical value range.

Next, the effects of Examples 6 to 10, especially Examples 8 to 10, will be described.
As the resin fiber of the core material 5B used in Examples 6 to 10, the above-described low elongation and high strength resin fiber is used. Also, the side material has a twisted structure of dissimilar metal strands in which a doped tungsten wire having a thermal conductivity of 5 times or more than the austenitic stainless steel wire mentioned above and a strongly processed austenitic stainless steel wire are in contact with each other. .
The resin film of the outer layer material 7 is formed by extrusion molding or dip construction using a polyamide resin such as 6 nylon or 12 nylon, or a thermoplastic resin such as polyethylene or polyurethane, as in the above embodiments. In the case of the dip method, molding with a soluble nylon resin or acrylic urethane paint makes it possible to form a coating film with an extremely thin film of about 0.001 mm to 0.008 mm in one pass of the paint solution. After passing, the film is dried at 180 ° C. to 300 ° C., then re-passed into the coating solution, and by repeating this step, the film thickness can be adjusted. The ridges 11 having a one-way spiral shape between the ridges 9 and the grooves 10 can be formed in a form that is raised on the outer surface. In addition, the dimensional difference between the maximum outer diameter and the minimum outer diameter after the resin coating in the raised form is at least the diameter of the metal element wire (the diameter of the large diameter line in the case of a combination of a large diameter line and a small diameter line). It is desirable to set it to 20% or more, more preferably 30% or more, and this maximum dimensional difference is approximately 2 of the diameter of the metal wire (the diameter of the thick wire when the thick wire and the thin wire are combined). Is double.

And it is desirable for the synthetic resin material of the said resin film to contain the ultraviolet absorber. For example, in the case of a polyamide resin, the ultraviolet absorber is preferably a benzophenone type, a benzotriazole type, and the like, and the acrylic urethane paint is the same. In addition to the ultraviolet absorber, an antioxidant, a dispersion mixture, and the like are appropriately mixed. The reason for mixing ultraviolet absorbers is to prevent deterioration caused by ultraviolet rays from fluorescent lamps at fishing shops, in addition to ultraviolet rays contained in sunlight at fishing grounds. Especially, polyarylate resin fibers are severely yellowed by ultraviolet rays. This is because it is necessary to prevent a decrease in the tensile strength at break. In order to prevent discoloration of the polyarylate resin fiber of the core material 5B, it is desirable that the resin fiber contains a benzophenone-based or triazine-based ultraviolet absorber.

Next, the reason why the unidirectional spiral twisted form of the metal strands of the convex and concave ridge portions 9 and the concave groove portions 10 of Examples 8 to 10 is described. By adopting this twisted form, the needle knot strength and the binding strength with the road yarn can be made equal to or higher than those of generally used synthetic resin monofilaments. The results of Example 9 and Comparative Example 1 are shown in Table 6.

Comparative Example 1 shown in Table 6 is a commonly used fluorocarbon yarn having an outer diameter of 0.190 mm, which is a commonly used polyvinylidene fluoride monofilament.
According to Table 6, although Example 6 of the present invention uses a plurality of metal wires, it obtains a needle-knotting strength equal to or higher than that of the fluorocarbon yarn of Comparative Example 1 and a binding strength property with a road yarn. be able to. The reason for this is that, for example, when the binding portion is observed, the outer shape line of the binding portion 12B of the fluorocarbon yarn of the binding portion 12 is substantially equal in diameter as shown in FIG. The outline of 12A is uneven.
This is because the concave and convex ridges 9 made of metal strands bite into the concave groove 10 where the adjacent metallic strands are missing, and this phenomenon occurs continuously between the adjacent strands. Between the portions 91 and 92, the uneven ridge portion 93 of the adjacent line bites into and acts as a wedge effect. Further, the resin film of the outer layer material 7 is hard on each of the uneven ridge portions 91, 92, 93. It is thought that it acts as a loosening prevention effect by interposing a soft resin between the metals.

Next, a # 140 sandpaper is wound around a round bar with a diameter of 20 mm, and a wear resistance test is performed to measure the number of times until breakage in a state where a weight of 200 g is loaded and a 90 ° fishing line is bent. Compared to the fluorocarbon yarn of Comparative Example 1, the number of times of durability is about 15 to 30 times greater in Example 9, and 60 times or more in Examples 1 to 6, and wear resistance. All of the properties are particularly excellent. The reason for this is the presence of a high-hardness metal strand as a side material, that is, the presence of an austenitic stainless steel wire having a high total tensile strength property and a high-strength tensile strength characteristic close to the processing limit and high hardness, This is because it is considered that there is a tungsten wire having a Mohs hardness next to diamond or a doped tungsten wire.

Next, compared with the fluorocarbon yarn (Comparative Example 1), Examples 9 and 10 can greatly improve the curl resistance due to rubbing. The results are shown in Table 7.

The curl resistance test shown in Table 7 shows that a corner of R0.2 mm corner is loaded with 300 g of weight and bent 90 ° fishing line, reciprocated 5 times 200 mm one way, and then 100 mm long. In this range, the wave height indicating the curled height and the number within the range were examined.
From these results, Examples 9 and 10 clearly have a wave height of about 1/2 or less and a curl number of about 1/4 or less compared to Comparative Example 1 which is a fluorocarbon yarn. This means that Examples 9 and 10 of the present invention have a wave height lower than that of the fluorocarbon yarn and have a gentle wave shape. . The reason for this is that Comparative Example 1 is a synthetic resin monofilament having a high tensile breaking strength by a high degree of stretching, and a part of one side of the outer surface is continuously rubbed over the entire length, thereby not rubbing against the rubbed side. This is considered to be the result of a difference in elongation between the two sides. On the other hand, in Examples 9 and 10 of the present invention, since the missing portion of the metal strand is provided, the rubbing position is the portion of the metal strand, and this metal strand portion is the presence of the missing portion. Because of the use of different diameter wires (Examples 9 and 10) having different wire diameters, the portion to be rubbed is only a thick wire having a high hardness among these, and further rubs. The position interval is opened. Therefore, it can be considered that the rubbing position is due to the difference between the continuous state as shown in Comparative Example 1 or the intermittent state as in Examples 9 and 10.

And in order to make the film thickness of the resin film of the outer layer material 7 used in Examples 8 to 10 thinner, an extruder may be used, but a paint such as a soluble nylon resin or acrylic urethane is desirable, and The method is preferably passed through the coating solution, and after passing through the heat treatment for drying from 180 ° C. to 300 ° C. for 10 seconds to 60 minutes, it is re-passed through the coating solution. Alternatively, coating film formation by painting such as spraying may be used.
With this configuration, when used as a fishing device for Harris, especially as a fishing device for carp, it improves the bundling retention force and reduces the pressure resistance due to the water flow applied to the fishing line. Can be greatly improved. The function and effect will be described below.

FIG. 6 (A) shows how to use the habit of surfing, increasing the pressure resistance to the fishing line due to the water flow by deflecting the fishing line to speed up the swimming of the carp (shown in a), and the water flow by stretching the fishing line. It is the figure which showed the friend fishing method of the kite which reduces the pressure resistance to the fishing line by and slows the swim of the kite (illustration B), and guides the kite to a desired position by repeating this. FIG. 6B shows the state of the fishing line 4 of Patent Document 2 in which a metal wire is wound in a cross shape when the fishing line is bent, and FIG. 7B shows the state of the fishing line 2D of Example 6 of the present invention. Shown in A).

In the fishing line 4 of Patent Document 3, when the direction is orthogonal to the water flow direction, the “composite cross section is a substantially streamline cross section”, and the effect of improving water breakage due to three-dimensional turbulence is seen. There are few cases that are perpendicular to the water flow direction, it is inclined in the upper layer area near the fast-flowing water surface, and the fishing line is bent when trying to move the rod, and in the lower layer area near the water floor, the water flow direction is The fishing line 4 is in a parallel state. In such a case, in the state of FIG. 6B, the effect of improving the water breakage characteristic seen in Patent Document 3 can be seen in the cross section 42 of the fishing line 4 in the middle layer region that is relatively perpendicular to the direction of the water flow 14B. In the cross section 41 of the fishing line 4 in the upper region in the direction of the water flow 14A, the crossing area is increased with the presence of the crossover portion, and the cross-sectional area is further increased, and the pressure resistance applied to the fishing line 4 is increased, and further the water flow 14C In the lower layer region that is in a state parallel to the direction of, especially in the range of the parallel portion 44 of the fishing line 4 near the rod, a cylindrical structure 45 whose cross section approximates a continuous state of a substantially circular shape 43 when viewed from the direction of the water flow 14C. In addition, the cross-sectional area is increased due to the presence of the cross-over portion of the fishing line 4, and the pressure resistance due to the water flow applied to the fishing line 4 of Patent Document 3 increases with this cross-sectional area increasing phenomenon, which causes fatigue of the rod. When That.

On the other hand, the fishing line of Examples 8 to 10 of the present invention has no cross-overlapping part as compared with Patent Document 3, and thus can be reduced in diameter by reducing the cross-sectional area. In the fishing line 2E of Example 10, the large diameter wire 61A of the side material is the center and the both sides thereof are the thin diameter wires 62B, and in the middle layer region orthogonal to the direction of the water flow 14B, it is streamlined (FIG. 7 ( In A) the cross section 2D2 of the fishing line 2D) and in the upper layer area (FIG. 7A, the cross section 2D1 of the fishing line 2D), since there is no cross-overlapping portion referred to in Patent Document 3, the cross-sectional area is smaller than that in Patent Document 3, In the lower layer region in which the diameter can be reduced and the pressure resistance to the fishing line due to the water flow is small and the direction of the water flow 14C and the fishing line 2D are in parallel, the water flow 14C is spiraled by the configuration of the ridges 11 having a one-way spiral shape. Converted into a vortex, and one-way spiral The water flow 14C is divided into 14C1 and 14C2 by the diameter line 61A and the small diameter line 62B to form a spiral vortex flow 152 along the spiral large diameter line 61A and the small diameter line 62B. Similarly, a spiral vortex flow 151 is generated in the region, and the direction of the spiral vortex 151 in the upper layer region acts in the direction of the river bottom in the lower part of the figure, and as a result, a synergistic effect with the thick diameter line of high-density doped tungsten. Due to this, a force to submerge the fishing line to the bottom of the river acts.
That is, in the upper layer area, the fishing line is sunk by the synergistic action of the generation of the spiral vortex 151 and the thick line of the doped tungsten having a high density using the force of the water stream 14A having a fast river flow. Since there is no crossover portion, the cross-sectional area is reduced and the water flow 14C is diverted (14C1 and 14C2 in the figure). The present invention discloses a new technical idea that improves the water drainage characteristics from the streamlined structure of the cross section even when the thick wire 61A is used, and induces wrinkles to a desired position without fatigue.

Furthermore, in general, there are many plankton at the boundary position where the flow velocity difference where the tides collide with each other and where the water flow direction is opposite between the upper layer and the lower layer, and small fish that prey on it. Big fishes to aim at gather and become a great fishing point.
However, in such a place, a pressure gradient is generated from the flow velocity difference and the flow velocity difference due to the opposite of the water flow direction, resulting in a velocity discontinuity that becomes unstable (Kelvin-Helmholtz instability). Rotates (illustration (B)) and develops as a vortex surface with vorticity. (Figure (C)) In such a case, when the fishing line 3 of a generally used fluorocarbon line having a circular cross section is inserted into this fishing point, the fishing line 3 is lifted due to the flow direction of the developed vortex surface. It will deviate from the desired fishing point. Also, in the fishing line 4 of Patent Document 3, the pressure resistance due to the vortex increases as the cross-sectional area increases due to the state of the water flow direction in the lower layer region and the presence of the crossover portion, and the same phenomenon Is produced.
On the other hand, in the fishing line 2 of the embodiment of the present invention, particularly in the embodiments 8 to 10, even if the vortex flow from the lower layer region to the upper layer region occurs, the unidirectional spiral ridges 11 are formed after the resin coating. Even so, the above-described phenomenon of rising to the water surface is unlikely to occur due to the effect of improving the water breakage characteristics due to the form of being raised on the outer surface and the synergistic effect due to the presence of the dense doped tungsten wire. (Illustration (D))

Further, in the fishing line having the spiral 111 shown in FIG. 1 (F), the specific gravity is higher than that of the fluorocarbon fishing line 3 in the fishing line having the spiral 111 shown in FIG. Therefore, it does not cause such inconvenience, and further, it can be put into a desired fishing point and maintained its position by the synergistic effect due to the effect of improving the water drainage property and the presence of the highly doped tungsten wire.

As described above, the fishing lines of Examples 6 to 10 are particularly shown in FIG. 8A from the viewpoint of the good binding property by using the resin fiber as the core material and the metal strand as the side material and the effect of improving the water drainage property. As described above, in the fishing rod fishing device 16 using a single metal wire, binding with a conventional thread 131 called a conventional thread 131 that binds to the single metal wire 13 is unnecessary, and easy handling and a synthetic resin monofilament (nylon yarn, fluorocarbon yarn, etc.) It can be handled similarly. FIG. 8B shows an example of a kite fishing device 161 for fishing using the fishing line 2 (2A to 2E) of the present invention. In the figure, 132 indicates a top thread and 133 indicates a hanakan thread.
This is because the fishing line of the present invention is bound to or connected to the top thread 132 and the fishing rod by using a mechanism that binds or connects the top thread 132 and the hanakan thread 133. An assembly of a thread and a fishing rod. (However, fishing rods are omitted)

Next, FIG. 9 shows a view when the fishing lines 1 and 2 of each embodiment of the present invention are wound around the spool 18 by the spinning reel 171 of the reel 17, for example, when the spinning reel 171 rotates to the left arrow in the figure ( Z direction), and the twisting direction of the metal strands of the fishing lines 1 and 2 is preferably the S direction opposite to this. The reason for this is that when winding the fishing lines 1 and 2 around the spool 18, it is possible to increase the flexibility of the fishing line by winding it in the direction of loosening the twisting direction of the metal strands. This is because the curled curl is difficult to stick. This phenomenon can be obtained by using the fishing line 1 and 2 of each embodiment of the present invention as a fishing line Harris 25 for connecting the unwinding 24 and the needle 23 as shown in FIG. is there.
That is, by winding the spinning reel in the direction opposite to the twisting direction of the metal strands of the fishing line 1 and 2 of the fishing line 1 of the present invention of the fishing line Harris 25, it can be wound in the loosening direction, and as a result the tension applied to the fish When the fishing line Harris 25 rotating in the direction opposite to the twisting direction can be kept low, the fishing rod can be easily operated.

In addition, for example, in particular, the fishing line having the structure of the convex and concave ridges 11 formed by the concave and convex ridge portions 9 and the concave groove portions 10 of the fishing lines 2C to 2E of Examples 8 to 10 vibrates important information when the fish is caught. It can be communicated to the angler as a transmission means. That is, since the fishing line 2 of Examples 7 to 10 of the present invention forms the concave and convex ridges 11 of the concave and convex ridge portions 9 and the concave groove portions 10 of the metal twisted wire through the soft resin film, For example, when the fish feeds the fishing line 2 in a state where the fishing line 2 is inserted into the threading rod, the fishing line 2 is pulled by the take-up of the reel 17 at that time, and the fishing line 2 is pulled to generate tension. Vibration is generated by sliding the concave and convex strips 11 of the fishing line 2 on the inner side and the tip end device 191, and the vibration transmission is repeated by repeating this. That is, when the fishing line 2 is slid within the rod, the ridges 9 and the ridges 11 of the groove 10 are slid. By sliding in the through hole 19, a tension fluctuation having a large width of the tension fluctuation width 26 as shown in FIG. 10C is generated, and the inner diameter is further expanded toward the hand side. By using the hollow rod 19 in the hollow tube, the fluctuation in tension can be transmitted as vibration transmission in the through rod 19 and resonated and amplified as vibration transmission sound, and transmitted to the angler as a fish signal. As a result, the angler can easily operate the rod for the fish. Further, as shown in FIG. 10 (B), when the fishing line Harris 25 enters the portion of the rod 20A, the fishing line Harris 25 moves from the fishing line position 21 to the fishing line position along the outer rod of the rod 20A during respiration or swimming. 22 and the fishing line Harris 25 slides with the rod 20A. At that time, as in the case described above, the numerous irregularities 11 of the fishing line Harris 25 generate tension fluctuations by sliding with the rods. As a result, the angler recognizes the state of the fish on the bait as vibration transmission and vibration sound. In the case where a cautious rod operation that requires easy cutting of the fishing line is required at a sharp rod portion, the timing for fishing can be achieved, and the rod operation can be facilitated.

The above described threading rod, sliding between the tip end 191 of the threading rod and the fishing line, and transmission of vibration to the angler by sliding between the fishing line Harris 25 and the rod 20A are not limited to the fishing line 2. Even if the fishing line 1 has a small tensile fluctuation width 26, the angler can transmit this vibration if the side member is formed by winding a plurality of metal strands in a unidirectional spiral shape to form an uneven shape. It can be perceived.
The reason for this is that as the fish grows bigger, the tension applied to the fishing line increases, and as the tension increases, the sliding load also increases, making it easier to detect the unevenness, and the resonance action in the hollow rod. This is because it can be amplified and transmitted to the angler as fish.
Accordingly, the fishing line of the present invention includes the case where it is used as the fishing line Harris 25. The fishing line 1 or 2 is used as the fishing line Harris and is connected to the road line, and the road line is slid in the threading rod. An assembly of the fishing line Harris of the fishing line 1 or 2, characterized in that the vibration from Harris is transmitted to the hand portion of the threading rod, and the roadline, reel, and threading rod is also included.
In this way, there is a special effect that can be transmitted as important information to the angler as vibration transmission means by the assembly of the fishing line, the reel and the through rod.

Another embodiment of the present invention will be described.
FIG. 1 (E) shows that six side members 6A and 12 side members 6B of austenitic stainless steel wire, which are hard-worked, are wound around one core member 5A having a high thermal conductivity with respect to the first and second embodiments. The spiral rope 1 × 19, FIG. 4 (C) of the spiral rope to be used as a book, has an uneven ridge portion 9 made of different diameter wires of different metals with respect to Examples 9 and 10 on one side. It is set as the twist structure arranged in order from the large diameter wire to the small diameter wire from the side to the other side.
Thereby, bundling property and water drainage characteristics can be improved for the same reason as described above. FIG. 1 (F) shows that the resin film thickness of the outer layer material 7 is 0.001 mm or more and less than the diameter of the metal wire of the side material (0.015 mm in this example) compared to Example 1. Similarly to the above, the fishing line is characterized in that the spiral formed by spirally winding the side material on the outer peripheral portion appears as the spiral 111 on the outer surface after the resin coating is formed.
With this configuration, the tensile breaking strength of the fishing line can be drastically improved, and the loosening prevention effect after the binding and the water drainage characteristics can be improved.

FIG. 11 shows the thermal characteristics of the metal wire used for the side material, and the final wire drawing with a total area reduction of 95% or more using an austenitic stainless steel wire as the base material of the metal wire of the side material. It is the figure which showed the tensile fracture strength characteristic under the heat influence (each temperature for 30 minutes) of the subsequent metal element wire, and the illustrated a for SUS304 material and the illustrated b for SUS316 material.
According to this, SUS304 material began to increase in tensile strength at 180 ° C due to the heat effect, showed the highest tensile strength at about 450 ° C, and the effect of improving tensile strength was noticeable up to 495 ° C, and If it exceeds 520 ° C., the tensile strength at break will decrease more rapidly than normal temperature (20 ° C.). The SUS316 material containing Mo shows the same tendency as the SUS304 material on the low temperature side, but shows the highest tensile rupture strength property at about 480 ° C on the high temperature side, and the effect of improving the tensile strength property is remarkable up to 525 ° C. And if it exceeds 540 degreeC, tensile fracture strength will fall more rapidly than normal temperature (20 degreeC).
The reason why the tensile strength at break is abruptly reduced is that, as described above, the solution-treated austenitic stainless steel wire is precipitated with carbon when heated from 520 ° C. and 540 ° C. to 800 ° C. This sensitization phenomenon appears in 4 to 5 minutes at 700 ° C for ordinary SUS304 and SUS316 austenitic stainless steel wires that require energy for chromium migration and are not more than 0.08% carbon, especially through sensitization. This is because the tensile strength at break is extremely reduced.

Since it has such a tensile strength at break, the low temperature heat treatment temperature range of the SUS304 metal wire is preferably 180 ° C. to 495 ° C. Also, for example, the SUS316 material (Mo is 2 to 3% by weight) containing Mo The low temperature heat treatment temperature range of the wire is preferably 180 ° C to 525 ° C.
And as can be seen in Table 5, the tensile breaking force can be increased by heat treatment (low-temperature heat treatment) using heat at the time of resin film molding of the outer layer material 7, that is, heat conduction by the resin film, and the increase It was found that all the rates exceeded 10%, and in Examples 1, 2, and 5, it was possible to increase from 12.9% to 14.0%.
Thus, the present invention pays attention to the tensile breaking strength characteristics depending on the temperature of one metal element wire having high thermal conductivity and the other austenitic stainless steel wire having a high total area reduction rate by wire-stretching, By performing low-temperature heating and low-temperature heat treatment under suitable conditions after the twisted configuration of dissimilar metal wires, the heat capacity of each metal wire is small and easily affected by heat, and the temperature is controlled within a certain temperature range. Taking advantage of the heat generated during molding of the resin coating, taking into account the difficulty of heat radiation in the sealed state with the resin coating, the structure that enhances the thermal insulation and thermal effect, the heat conduction characteristics, etc. It provides a new technical idea that can greatly improve the breaking strength.

In addition, the chemical components of the austenitic stainless steel wire, which is the other metal wire of this example, are C: 0.15% or less, Si: 1% or less, Mn: 2% or less, and Ni: 6 to 6% by weight. 16%, Cr: 16% to 20%, P: 0.045% or less, S: 0.030% or less, Mo: 3% or less, balance iron and inevitable impurities. Thus, even if it does not use high silicon stainless steel (Si: 3.0%-5.0%), the metal strand of a high-strength austenitic stainless steel wire can be obtained by using the said process. C is preferably 0.005% or more for improving the tensile strength at break, and is preferably 0.15% or less from the viewpoint of suppressing intergranular corrosion.

In addition, the other metal wire of the present invention is an austenitic stainless steel wire of 0.008 mm to 0.120 mm, and in particular, the thin wire is 0.008 mm to 0.040 mm and the tensile breaking strength is 300 kgf / min or more. In order to enable wire drawing with a total area reduction of 95% or more, SUS304 material or SUS316 material using a remelting material is desirable.
The reason for this is that the cause of disconnection when drawing a stainless steel wire is most often an oxide-based inclusion as well as a surface flaw, and in particular, the diameter of the other metal strand of the embodiment of the present invention is 0. This tendency is remarkable in the fine wire of 025 mm or less. And the chemical component is low in the components of Al, Ti, Ca, O, which are inclusion generation elements, and also suppresses S that causes a reduction in wire drawing due to the action of sulfide. The specific chemical components of the austenitic stainless steel wire are, by weight, C: 0.08% or less, Si: 0.10% or less, Mn: 2% or less, P: 0.045% or less, S: 0 0.010% or less, Ni: 8 to 12%, Cr: 16 to 20%, Mo: 3% or less, Al: 0.0020% or less, Ti: 0.10% or less, Ca: 0.005% or less, O : 0.0020% or less, with the balance being Fe and inevitable impurities. In particular, this material is desirable for extra fine wires having a metal strand diameter of 0.025 mm or less. In addition, you may use this material for the thick wire of a present Example thicker than this.
And as a manufacturing method of a remelting material, it is the manufacturing method of the electroslag remelting which used the flux for the ingot after melting of stainless steel.

Further supplementally, the tensile / elongation characteristic diagram of the fishing line 2 (2A to 2E) of the embodiment of the present invention has a large elongation in the low load region (A in the drawing) as shown in FIG. This is a characteristic non-linear characteristic that is the opposite phenomenon (B in the figure). Due to this characteristic, the impact force is reduced by strong alignment when the fish hits the needle, and the impact force is reduced by excessive hitting of the carp, and the fish's mouth is cut and the fishing line is broken by applying the impact force. be able to. Also, the reason why the tensile / elongation characteristics become nonlinear in the fishing line 2 of the embodiment of the present invention is that the core material is a low-stretch high-strength resin fiber, and a fiber bundle (5 at 28 dtex) having many spaces between the fibers. , 440 dtex and 80 fibers), and the outer peripheral part has a one-way spiral twisted configuration with metal strands missing at regular intervals. Since the tensile force is applied to the material and the space between the fibers is narrowed, it exhibits a high elongation property in the low load range, and if the tensile force is further increased, the tensile strength is strong against the twisted wire of the metal strands. Is added to support this tensile force together with the core material, and the resin film on the outer periphery acts as an auxiliary action to support this tensile force, and as a result, it is considered that the reverse phenomenon of small elongation is exhibited in the high load range. is there.

And the manufacturing method of the fishing line 1 of this invention is described below.
A core member made of a metal wire having a strand diameter of 0.008 mm to 0.120 mm, and a plurality of metal strands having a strand diameter of 0.008 mm to 0.120 mm twisted outside the core member In the method for manufacturing a fishing line comprising an outer layer material with a resin coating on the outside of the side material, the metal wire of the core material has a thermal conductivity of 5 times or more than the metal wire of the side material. In addition, a tungsten or doped tungsten sintered body having a relative density of 99% or more is used, and a wire drawing step is provided after the swaging process step so that the tensile breaking strength is 300 kgf / mm 2 or more. The wire is a solution-treated austenitic stainless steel wire, and is subjected to a low-temperature heat treatment step at 400 to 495 ° C. for 10 to 180 minutes after the wire drawing step or the wire drawing step, or the metal element of the side material Line is Mo For austenitic stainless steel wire, a low-temperature heat treatment step is provided at 400 to 525 ° C. for 10 to 180 minutes, and the wire drawing step and the low-temperature heat treatment step are set as one set and at least one set is repeated after each step. Provide the final wire drawing step, the total area reduction ratio until the final wire drawing step is 95% to 99.5% or less, and the total increase rate of the tensile breaking strength by the low temperature heat treatment step until the final wire drawing step Is 15% or more, the tensile breaking strength is 300 kgf / mm 2 or more, and a plurality of metal strands of the side material are wound around the outer side of the core material in a continuous unidirectional spiral shape. After the twisting process, the core material and the side material are twisted, conduction heat, convection heat, or radiant heat at the time of resin film molding of the outer layer material is performed at 180 ° C. to 300 ° C. for 10 seconds to 60 minutes. Low temperature heat The side material is made to increase the tensile rupture force more than the tensile rupture force of the outer layer material before molding the resin film by a sandwich thermal form by low-temperature heat treatment from the outside of the core material and the side material. This is a method of manufacturing a fishing line.
This manufacturing method focuses on the characteristics of the tensile strength at break due to the temperature of the core metal wire with high thermal conductivity and the austenitic stainless steel wire with high surface area reduction due to strong work drawing of the side material. In addition, after twisting the dissimilar metal strands of the core and side materials, the tensile breaking strength in the dissimilar metal strand twisted state is greatly improved by utilizing the heat conduction characteristics by low-temperature heating and low-temperature heat treatment under suitable conditions. Can be made.
The reason why the thermal conductivity of the core material is 5 times or more, preferably 7 times or more that of the side material is to increase the tensile breaking strength improvement effect of the side material. The reason why the core material has a relative density of 99% or more (pore volume ratio of 1% or less), preferably 99.4% or more of tungsten or a doped tungsten sintered body is that the strand diameter is 0.00. The reason for providing a wire drawing step after swaging the tungsten sintered body or the doped tungsten sintered body is to facilitate wire drawing processing such as ultrafine wires such as 008 mm to 0.120 mm. The metal structure is aligned in the same direction to improve the tensile breaking strength. By using the above manufacturing method, an ultrathin tungsten wire or a doped tungsten wire having a tensile breaking strength of 300 kgf / mm @ 2 to 450 kgf / mm @ 2 is obtained. be able to.

[Effect of the invention]
As described above, the fishing line comprising the twisted structure of different metal strands of the present invention, and the method for producing the same, the metal strand having one high thermal conductivity, and the other wire drawing of strong processing close to the drawing limit. Focusing on the characteristics of the tensile fracture strength characteristics depending on the temperature of the processed austenitic stainless steel wire, the heat conduction characteristics etc. are utilized by low-temperature heating and low-temperature heat treatment under suitable conditions after the twisted structure of dissimilar metal wires. The present invention provides a new technical idea that greatly improves the tensile breaking strength in a twisted state of dissimilar metal strands.

Furthermore, in addition to the effect of improving tensile breaking strength characteristics, it provides new fishing line technical ideas such as sinking as a fishing line, wear resistance, curling resistance improvement effect, and water drainage improvement effect due to uneven stripes. is there. There are the above various effects.

DESCRIPTION OF SYMBOLS 1 Fishing line 1 151,152 Spiral vortex 2 Fishing line 2 16 Carp fishing device 3 Fishing line (Follow carbon line) 17 Spinning reel 4 Fishing line (Fishing line of patent document 3) 18 Spool 5 Core material 19 Through rod 6 Side material 20 Fish 7 Outer layer material 21 Fishing line position
8 Missing part 22 Fishing line position
9 Convex and concave ridge 23 Needle 10 Concave groove 24 Unfold 11 Convex and concave 25 Fishing line Harris 12 Bundling portion 26 Tension fluctuation range 13 Metal single wire 111 Spiral strip 14 Water flow

Claims (8)

A core made of a metal strand having a strand diameter of 0.008 mm to 0.120 mm;
Provide a side material in which a plurality of metal strands having a strand diameter of 0.008 mm to 0.120 mm are twisted on the outside of the core,
In the fishing line consisting of the outer layer material of the resin coating on the outside of the side material,
The metal wire of the core material has a thermal conductivity of 5 times or more than the metal wire of the side material,
The side material is twisted in such a manner that a plurality of the metal wires of the side material are twisted outside the core material, and the twisting direction is continuously wound with respect to the longitudinal direction in a one-way spiral shape. A twisted configuration, and
The metal strand of the side material is
Using an austenitic stainless steel wire that has been subjected to a solution treatment, a low temperature heat treatment from 400 ° C. to 495 ° C. is provided after drawing and drawing,
Or when the metal strand of the side material is an austenitic stainless steel wire containing Mo, a low temperature heat treatment of 400 ° C. to 525 ° C. is provided,
The wire drawing and the low-temperature heat treatment are repeated as at least one set, and then the final wire drawing is provided, and the total area reduction until the final wire drawing is 95% to 99.5% or less. The total increase rate of the tensile breaking strength by the low temperature heat treatment up to 15% or more, the tensile breaking strength is 300 kgf / mm2 or more,
After twisting the core material and the side material, conducting low temperature heat treatment at 180 ° C. to 300 ° C. by conduction heat, convection heat, or radiant heat at the time of resin film molding of the outer layer material,
The side material is characterized in that the tensile breaking force is increased more than the tensile breaking force of the outer layer material before molding the resin film by a sandwich heating mode by low-temperature heat treatment from the outside of the core material and the side material. fishing line. A core material and a side material formed by twisting a plurality of different metal strands having a wire diameter of 0.008 mm to 0.120 mm on the outside of the core material, and an outer layer material of a resin coating on the outside of the side material In a fishing line consisting of
The core material is composed of a low elongation high strength resin fiber having a fineness of 28 to 440 dtex,
The twisted configuration of the dissimilar metal strands of the side material is a twisted configuration in which the dissimilar metal strands are adjacently contacted and the twisting direction is continuously wound with respect to the longitudinal direction to form a spiral in one direction,
One of the metal strands has a thermal conductivity of 5 times or more than the other metal strand,
The other of the metal wires is a solution-treated austenitic stainless steel wire, and after the wire drawing and wire drawing, a low temperature heat treatment of 400 ° C. to 495 ° C. is provided,
Or when the other metal strand is an austenitic stainless steel wire containing Mo, a low temperature heat treatment of 400 ° C. to 525 ° C. is provided,
The wire drawing and the low-temperature heat treatment are repeated as at least one set, and then the final wire drawing is provided, and the total area reduction until the final wire drawing is 95% to 99.5% or less. The total increase rate of the tensile breaking strength by the low temperature heat treatment up to 15% or more, the tensile breaking strength is 300 kgf / mm2 or more,
After twisting the core material and the side material, conducting low temperature heat treatment at 180 ° C. to 300 ° C. by conduction heat, convection heat, or radiant heat at the time of resin film molding of the outer layer material,
The other of the dissimilar metal strands of the side material has a tensile breaking force due to the contact form between the outer side of the outer layer material and the one of the metal strands having high thermal conductivity from the outside by low-temperature heat treatment during molding of the resin film. A fishing line characterized in that the fishing line is increased more than the tensile breaking strength of the outer layer material before molding the resin film. The metal element wire of the core material according to claim 1 is composed of a tungsten wire, a doped tungsten wire added with an alkali metal, or a doped tungsten wire added with at least one of aluminum, potassium, and rhenium. the fishing line according to claim 1. 3. The one dissimilar metal element wire of the side member according to claim 2 is made of a tungsten wire, a doped tungsten wire added with an alkali metal, or a doped tungsten wire added with at least one of aluminum, potassium, and rhenium. The fishing line according to claim 2. The metal strand of the side material according to claim 1 ,
Using a solidified austenitic stainless steel wire, the area reduction rate of the primary wire drawing is changed from 90% to 96%, and then the primary low-temperature heat treatment is performed from 400 ° C. to 495 ° C., or the other metal strand is made of Mo. When the austenitic stainless steel wire containing, after that, the primary low-temperature heat treatment from 400 ℃ to 525 ℃,
The rate of increase in tensile fracture strength due to the primary low-temperature heat treatment is 10% or more, the area reduction rate of the secondary wire drawing is 50% to 89%, and then a secondary low-temperature heat treatment from 400 ° C. to 495 ° C. is performed,
Alternatively, when the other metal strand is an austenitic stainless steel wire containing Mo, a secondary low-temperature heat treatment at 400 ° C. to 525 ° C. is then performed,
The rate of increase in tensile rupture strength due to the secondary low-temperature heat treatment is set to 10% or more, and then a final wire drawing is provided, and the total area reduction rate to the final wire drawing is 97% to 99.5% or less,
2. The fishing line according to claim 1 , wherein the total increase rate of the tensile breaking strength by the low temperature heat treatment until the final wire drawing is 20% or more, and the tensile breaking strength is 340 kgf / mm <2> or more. The other metal strand of the side member according to claim 2
Using a solidified austenitic stainless steel wire, the area reduction rate of the primary wire drawing is changed from 90% to 96%, and then the primary low-temperature heat treatment is performed from 400 ° C. to 495 ° C., or the other metal strand is made of Mo. When the austenitic stainless steel wire containing, after that, the primary low-temperature heat treatment from 400 ℃ to 525 ℃,
The rate of increase in tensile fracture strength due to the primary low-temperature heat treatment is 10% or more, the area reduction rate of the secondary wire drawing is 50% to 89%, and then a secondary low-temperature heat treatment from 400 ° C. to 495 ° C. is performed,
Alternatively, when the other metal strand is an austenitic stainless steel wire containing Mo, a secondary low-temperature heat treatment at 400 ° C. to 525 ° C. is then performed,
The rate of increase in tensile rupture strength due to the secondary low-temperature heat treatment is set to 10% or more, and then a final wire drawing is provided, and the total area reduction rate to the final wire drawing is 97% to 99.5% or less,
3. The fishing line according to claim 2, wherein the total increase rate of the tensile breaking strength by the low-temperature heat treatment until the final wire drawing is 20% or more, and the tensile breaking strength is 340 kgf / mm @ 2 or more. In the fishing line according to any one of claims 1 and 3,
The twisted configuration of the core material and the metal wire of the side material is such that the metal material wire of the core material is one, and the metal wire of the side material is composed of 7 to 8 spiral ropes. Fishing line. A core made of a metal strand having a strand diameter of 0.008 mm to 0.120 mm;
Provide a side material in which a plurality of metal strands having a strand diameter of 0.008 mm to 0.120 mm are twisted on the outside of the core,
In the method for producing a fishing line comprising an outer layer material of a resin coating on the outside of the side material,
The core metal wire is
Using a tungsten or doped tungsten sintered body having a thermal conductivity of 5 times or more and a relative density of 99% or more than the metal strand of the side material, a wire drawing process is provided after the swaging process. The tensile strength at break is 300 kgf / mm2 or more,
The metal strand of the side material is
Using a solidified austenitic stainless steel wire, a low-temperature heat treatment step is performed at 400 to 495 ° C. for 10 to 180 minutes after the wire drawing step and the wire drawing step,
Alternatively, when the metal strand of the side material is an austenitic stainless steel wire containing Mo, a low-temperature heat treatment step is performed at 400 to 525 ° C. for 10 to 180 minutes,
The wire drawing step and the low-temperature heat treatment step are set as one set, and after at least one set of each step is repeated, a final wire drawing step is provided, and the total area reduction ratio until the final wire drawing step is 95% to 99.5%. The total increase rate of the tensile breaking strength by the low-temperature heat treatment step until the final wire drawing step is 15% or more and the tensile breaking strength is 300 kgf / mm2 or more,
A twisted structure in which a plurality of metal strands of the side material are used and wound in a unidirectional spiral continuously on the outside of the core material in the longitudinal direction;
After the step of twisting the core material and the side material, a low-temperature heat treatment step is performed at 180 ° C. to 300 ° C. for 10 seconds to 60 minutes by conduction heat, convection heat, or radiant heat at the time of resin film forming of the outer layer material. And
The side material is characterized in that the tensile breaking force is increased more than the tensile breaking force of the outer layer material before molding the resin film by a sandwich heating mode by low-temperature heat treatment from the outside of the core material and the side material. A method for manufacturing fishing lines.