JPH0671401B2 - Collapsible thin metal core Tegs - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention is thin and strong, which does not pollute the natural environment, does not pollute the natural environment even if it is left on a fishing ground, naturally collapses in its natural environment. The present invention relates to a small-diameter metal core gut (fishing line).

[Prior Art] Most of the currently used Tegus are plastic monofilaments, and most of the plastics are nylon and some are fluorocarbon.

When conventional Tegs are thrown away from fishing grounds, struck by obstacles and broken, and left behind in water or tree branches, they do not deteriorate immediately in the natural environment and cause many problems.
For example, the neglected Tegus is entangled with wild birds, causing death and injury, inhibiting the growth of plants, and being entangled with humans in the water and threatening their lives.

[Problems to be Solved by the Invention] The inventors of the present invention filed a patent application for Japanese Patent Application No. 62-320472 (Japanese Patent Application Laid-Open No. 01-160443) mainly for underwater threads for fishing for Ayuyu, in which a thin metal stranded wire is coated with resin. However, even this Tegus is not actively considered for the above-mentioned environmental problems, and although the coating film of the resin coating is thin, the deterioration rate in the natural environment is not as low as that of plastic monofilament, Not so fast.

In view of the above problems, the present invention aims to provide a collapsible small-diameter metal core gut which does not harm the natural ecosystem even if left undisturbed under the natural environment such as oxidation, hydrolysis and microorganisms. is there.

[Means for Solving the Problems] In order to achieve the above-mentioned object, the structure of the present invention forms a thin metal twisted wire by twisting a plurality of thin metal wires made of carbon steel having disintegration to form a thin metal wire. The metal twisted wire is coated with a resin having disintegration on the surface.

[Operation] The collapsible thin metal core Tegs of the present invention has an outer diameter of 0.05 to 0.15 mm.
It has a breaking load of 0.7-3.5kg, is soft and has a smooth surface, and even if it is cut with scissors, the thin metal wire does not fray and no pinhole is seen. However, the collapsible small-diameter metal core Tegus has a disintegrating resin coating layer (coating film) that deteriorates in water or air, and after a few days to several months, the strength of the collapsible small-diameter metal core Tegus has an initial value. It becomes less than 1/2 of the above and easily damaged by external force.

As described above, when the coating film of the collapsible thin metal core Tegs of the present invention collapses, the thin metal wire made of carbon steel comes into contact with oxygen and rusts. Since the thin metal wire has an extremely small outer diameter, its strength is impaired in a short time due to rust. In particular, when the coating film of the collapsible thin metal core Tegus is mechanically damaged, rust progresses from the damaged part to the thin metal wire, and the thin metal wire made of carbon steel rusts.
It expands the volume ten times and peels off the coating film, shortening the disintegration time of Tegus.

[Examples of the Invention] As shown in FIG. 1, the collapsible thin metal stranded wire 2 used in the present invention is a metal made of carbon steel that oxidizes and deteriorates in the atmosphere, fresh water or seawater. A thin wire (element wire) 1 is twisted together. The thin metal wire 1 constituting the thin metal stranded wire 2 is preferably a steel wire having an outer diameter of about 0.015 mm to 0.05 mm, particularly a piano wire, a special steel wire having a fine-grained structure, and the like. ~ 19 strands are twisted together. For the fine metal wire 1, use a normal twisting machine, and the twisting pitch is 10 to 30 times the outer diameter of the twisting wire,
It is preferably twisted 14 to 25 times, but the twisting direction does not matter. The tensile strength of the thin metal wire 1 is 300 to 500 kgf / mm, and in the case of the thin metal stranded wire 2 of 7 strands, one that can withstand a tensile load of 700 to 3,500 g is preferable.

The collapsible thin metal stranded wire 2 obtained as described above is
The dirt is removed by washing, and the resin coating layer 3 is applied on the surface.
To form a collapsible thin metal core tex. Water vapor, organic solvent or alkali is used to wash the thin metal stranded wire 2, and a lubricant for wire drawing, a lubricant for twisting machine, metal powder, etc. adhering to the surface of the thin metal stranded wire 2 is used. The dirt is removed and the adhesiveness of the resin coating layer 3 to the thin metal stranded wire 2 is improved.

As the paint used for the resin coating layer 3 having the disintegration property of the washed thin metal twisted wire 2, oxygen in a natural environment,
Materials that are easily degraded or decomposed by heat, ultraviolet rays, moisture, microorganisms, such as polytetramethylene adipate, polyesteramide, modified polyamide, polyimide, modified polyimide, modified acrylic resin, polyamide elastomer, polyester-based urethane resin, modified polyurethane, polyethylene saxie Ester / ethylene glycol, polyethylene terephthalate / ethylene glycol, polyethylene terephthalate / tetramethylene glycol, polyethylene succinate / ethylene glycol, polyethylene succinate / tetramethylene glycol, and other polyester block copolymers, as well as collagen, modified collagen, and cellulose. Furthermore, polylactic acid, polyglycolic acid, para-dioxanone polymer, glycolic acid / lactic acid copolymer, 3- Dorokishi KOKUSAN / 4-hydroxylate polymer, 3-hydroxy Kokusan / 3-hydroxyvalerate copolymer, polyglycolic acid / trimethylene carbonate, poly glycolic acid / ethylene glycol.

The various synthetic or natural polymer materials as described above are prepared into an aqueous solution, an organic solvent solution, a dispersion, or the like. Desired disintegration (or deterioration characteristics) at the time of preparation
In order to obtain coating strength, it is necessary to pay attention to selection of solvent and / or additive and concentration of liquid.

In order to improve the adhesiveness of the resin coating layer 3, the paint may be divided into two types, one for undercoating and one for topcoating, or three types including for intermediate coating. Inorganic fine powder may be added to the coating material in order to enhance the adhesion strength, or a pigment may be added for the purpose of identification. The viscosity of the coating material is appropriately adjusted according to the coating method, the feeding speed of the thin metal twisted wire 2, the firing temperature, the type of resin, the number of coatings, and the thickness of the coating film for each coating step. When the coating material forms a beaded shape on the thin metal stranded wire 2 and hardens, the unevenness can be removed by scraping off the excess coating material with a die, felt, or the like. Further, if the firing temperature is too high, the solvent is abruptly vaporized and the surface is likely to be roughened. Therefore, the firing temperature is adjusted according to the type of the solvent.

The coating may be either a vertical system or a horizontal system, and the point is to adjust the viscosity of the coating in consideration of the type of resin and the above conditions so that the desired coating thickness can be obtained (e.g. 0.1-70 poise). degree). Furthermore, the temperature of the furnace when baking or drying the liquid coating film and the thin metal stranded wire 2
It is important to set the tension to be applied to the thin metal stranded wire 2 so as to remove the creases (internal strain and twist strain peculiar to the wire). The temperature of the oven during baking or drying depends on the type of paint containing the disintegrating resin, but in general
100 to 350 ° C, particularly 120 to 300 ° C is suitable, and the residence time in the furnace is about 0.5 to 5 minutes, and the tension applied to the thin metal twisted wire 2 at that time is about the tensile strength of the thin metal twisted wire 2. When it is set to 20 to 30%, the molding strain of Tegus is removed, and it is possible to make a flexible collapsible thin metal core Tegus without habit.

The number of coating times is set to 1 to 10 times, preferably 3 to 7 times in consideration of the effect of the firing temperature on the thin metal stranded wire 2, coating film quality and efficiency. The baking temperature is about 130 to 250 ° C. when the coating resin is modified polyimide, and about 120 to 270 ° C. when the modified polyurethane or modified polyamide is used. If the firing temperature is high, the physical properties of the thin metal twisted wire 2 may be deteriorated. Therefore, it is better to avoid firing at a temperature higher than 300 ° C. for a long time. When the coating is performed at the above temperature while applying the tension in this way, the tensile strength of the thin metal stranded wire 2 before coating does not decrease and the strain is relaxed, so in many cases, after the coating, the thin metal stranded wire 2 is rather thin. A slight increase in the tensile strength of the metal stranded wire 2 is observed.

After firing or drying, the thin metal stranded wire 2 coated with the collapsible resin is cooled and wound on a reel.
If the outer diameter is measured with a laser during winding, the uniformity of the coating film and the outer diameter can be inspected and guaranteed.

Next, specific examples of the present invention will be described.

Example 1 As shown in FIG. 1, as fine metal wire 1, an extra fine steel wire (piano wire) having an outer diameter of 0.022 mm is twisted with a pitch of 20 times the outer diameter of the twisted wire, and the outer diameter is 0.066 mm, and the wire is pulled. We made a thin metal stranded wire 2 that can withstand a load of 1.10 kg. After washing the obtained thin metal twisted wire 2 with Freon, in order to obtain a collapsible resin coating layer 3, a varnish containing a modified polyimide resin as a main component is dip-coated by a pulling method to obtain a thin metal twisted wire. 2 in a vertical furnace 25
While applying a tension of 0 ± 30 gf, the coating film is baked at a baking temperature of 200 to 300 ° C. The above coating / baking is repeated 4 times to form the resin coating layer 3, and a collapsible thin metal having an outer diameter of 0.070 mm. Got a core Daegus.

The breaking load of this collapsible small-diameter metal core Tegus was 1.11 kg, and the thin metal wire 1 did not come apart even if the cross section was cut with scissors. When this collapsible small-diameter metal core tex was immersed in natural water, the resin coating layer 3 swelled and after a few days the surface slightly changed into a linear shape, after which the strength of the coating film gradually declined and after 3 months. After that, it could be easily scraped off with a nail. Then, when washed with water and left at room temperature, the thin metal stranded wire 2 immediately rusted and lost its strength.

In addition, when this collapsible thin metal core Tegus was used as an underwater thread for Ayuyu fishing, the strength was sufficient, the hit was felt more sharply than Nylon Tegus, the twisting was weak, and there was no problem in handling. .

Example 2 As the fine metal wire 1, seven steel wires having an outer diameter of 0.032 mm were twisted together with a pitch 18 times the outer diameter to produce a thin metal stranded wire 2 having an outer diameter of 0.096 mm and a breaking load of 1.85 kg. Polyethylene-succinate-b-is formed on the resin coating layer 3 of the thin metal strand 2.
Except for using a coating solution containing ethylene glycol, a disintegratable small-diameter metal core tex having an outer diameter of 0.097 mm was obtained in the same manner as in Example 1. When this collapsible thin metal core Tegus was immersed in a liquid of natural water (PH7.3), deterioration of the resin coating layer 3 was observed after 10 days.

The breaking strength of the collapsible small-diameter metal core Tegs was stabilized or slightly increased by the resin coating layer 3, and there was no problem in the actual fishing test (1 day). The day after the actual fishing day,
In the collapsible small-diameter metal core Tegus, strength was rapidly lost due to rusting at the binding part and the part that seemed to have been externally damaged.
After that, the resin coating layer 3 was gradually peeled off, the thin metal stranded wire 2 inside was exposed, and rust further progressed.

Example 3 A disintegrating property was performed in the same manner as in Example 1 except that a piano wire having an outer diameter of 0.022 mm was used as the fine metal wire 1, and polyglycolic acid was used as the resin coating layer 3 of the fine metal wire strand 2. I made a thin metal core Tegsu. When this collapsible thin metal core Tegus was immersed in a solution of PH7.3, deterioration was observed in about 5 weeks.

This collapsible thin metal core Tegs is used for actual fishing,
The performance was satisfactory. On the day after the day of use, the collapsible small-diameter metal core Tegus was rusted at the binding part and the part that seemed to be under strong stress, and its strength was lost.

Also in this collapsible small-diameter metal core tex, the resin coating layer 3 was peeled off with time, and the small-diameter metal stranded wire 2 inside was corroded due to rust, as in the above-mentioned Examples.

EFFECTS OF THE INVENTION The collapsible thin metal core tex according to the present invention is coated with a resin having oxidative and collapsible properties on the surface of a thin metal stranded wire made of carbon steel having collapsible property, and is left naturally. Then, the resin coating layer is deteriorated and decomposed by moisture, carbon dioxide, oxygen, ozone, ultraviolet rays, microorganisms, etc., and the fine metal wires inside are exposed. Then, the fine metal wires are deteriorated by rust, and the shape as Tegus cannot be retained. Therefore,
There is no harm to wildlife and humans.

In particular, when the resin coating layer of the collapsible thin metal core Tegus is mechanically damaged, rust progresses from the damaged portion of the resin coating layer to the thin metal wire, and the carbon steel that constitutes the thin metal wire is compared to other metals. The degree of volume expansion during rusting is large,
The resin coating layer (coating film) is peeled off due to the volume expansion during rusting, and the gut is collapsed within a short period of time.

The collapsible small-diameter metal core Tegus has a circular cross section (filled with twists) and has a smooth surface, so its running resistance is small.

The elasticity of the fine metal wire made of carbon steel and the characteristics of the resin having disintegration are properly balanced, and despite its thinness, it has high strength and no twisting, and there is little sticking to the hand or entanglement of the Tegus, and handling is easy. Good.

It has about twice the strength of nylon Tegus of the same outer diameter, has less elongation, and is good for fish.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a collapsible thin metal core gut according to the present invention. 1: Collapsible thin metal wire, 2: Thin metal twisted wire, 3: Collapsible resin coating layer

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hideo Yagihashi 2-25-25 Miyasaka, Setagaya-ku, Tokyo Incorporated company Junko (72) Inventor Ken Hoshiko 2-25-25 Miyasaka, Setagaya-ku, Tokyo Junkosha Ltd. (56) References JP-A 59-175837 (JP, A) JP-A 2-203729 (JP, A) Actually developed 52-10890 (JP, U)

Claims (1)

[Claims] 1. A thin metal twisted wire is formed by twisting a plurality of thin metal wires made of carbon steel having a collapsible property, and a resin having a collapsible property is coated on the surface of the thin metal wire strand. A collapsible thin metal core Tegs.