JP5217335B2 - Covering yarn and pressure stocking using the same - Google Patents

Description

  The present invention relates to a covering yarn capable of reducing a rubber touch peculiar to an elastic fiber and expressing a soft texture when used for a pressure stocking, and a stocking using the covering yarn.

  BACKGROUND ART A pressure stocking using an elastic fiber having a fineness of 30 dtex or more as a core yarn of a covering yarn is widely used for its effect of tightening a leg and preventing the swelling of the leg. As the covering yarn used for the pressure stocking, an elastic yarn of 30 to 80 dtex is used as the core yarn, and a polyamide multifilament such as a fineness of 11 dtex, a filament number of 8 filaments, a fineness of 13 dtex, and a filament number of 10 filaments is used as the wound yarn. Yes. On the other hand, an ordinary stocking generally uses an elastic fiber of about 22 dtex as a core yarn, and a polyamide multifilament having a fineness of 11 dtex, a filament number of 5 filaments, a fineness of 13 dtex, and a filament number of 7 filaments as a wound yarn.

  As described above, the conventional pressure stockings are thicker than the general stockings, but the fineness of the polyamide multifilament is not so much compared to the normal stockings in consideration of transparency. The current situation is that the elastic fiber is not completely covered. For this reason, the elastic fiber cannot be completely covered with the polyamide multifilament around the thigh that is greatly stretched, and is exposed. Therefore, the rubber touch peculiar to elastic yarn was felt, and it was disliked that the slipperiness was poor, the touch was not good, and the heat was not felt.

  On the other hand, in Patent Document 1, it has been proposed to use a polyamide long fiber having a convex lens type cross-sectional shape so that the polyurethane elastic yarn is uniformly wound so as not to appear on the surface. However, it is not intended to reduce the rubber touch as can be seen from the use of polyurethane elastic yarn of 20 dtex (18 denier) in the embodiment, and this is applied to the pressure stocking. However, the control of the cross-sectional shape alone is not sufficient to reduce the rubber touch, and there is a problem in the softness of the texture.

  Further, in Patent Document 2, it has been proposed to use a polyamide multifilament false twisted yarn having a single yarn fineness of 0.7 dtex or less as a wound yarn so that the sock has a smooth and soft texture and is excellent in heat retention. Yes. However, the maintenance of the transparency of the pressure stocking aimed at by the present invention cannot be achieved by using false twisted yarns, but rather aims at improving heat retention, and the concept is different.

  Furthermore, in Patent Document 3, a polyamide synthetic fiber multifilament of single yarn denier 0.5 to 3.0 denier and total denier 5 to 20 denier is used as a covering yarn, and rubber elastic fiber of 10 to 30 denier is used. Although there is no mention about the problems when applying to pressure stockings, and when using thick elastic fibers such as pressure stockings, the total fineness and single yarn are used as covering yarns. There is no disclosure about how to control the fineness and the number of filaments, so if the method described in this document is applied to the pressure stockings as they are, only rubber touch stockings can be obtained.

Patent Document 4 discloses an example of a pressure pantyhose. Such a pressure stocking imparts a feeling of tightening to the leg part. As Example 1, an elastic yarn (31 dtex) is made of 8 dtex 5-filament polyamide multifilament and has a higher covering property than a single covering yarn. In Example 3, the elastic yarn (33 dtex) is a single covering yarn using a 33 dtex wooly nylon yarn having a fineness greater than that of the polyamide multifilament of the present invention. As can be seen from the above, when covering an elastic yarn having a relatively large fineness with a polyamide multifilament, a double covering yarn is used to improve the covering property, or a polyamide multifilament having a relatively large fineness is used. Therefore, the rubber touch is reduced, but the texture becomes coarse and hard when the double covering yarn is used, and the elasticity is lost. When the 33 dtex wooly nylon yarn is used, the texture becomes tights, and both are inferior in transparency. Only things were obtained.
JP-A-10-331029 (paragraph numbers [0008] to [0015]) Japanese Patent Laying-Open No. 2005-240238 (paragraph numbers [0006] to [0019]) Japanese Patent Application Laid-Open No. 61-89301 (first page, upper right line 1 to page 3, upper right line 12, page 12) JP 2005-273089 A (paragraph numbers [0003] to [0007], [0027], [0029])

  Therefore, the present invention reduces the rubber touch peculiar to elastic fibers when used in a pressure stocking, provides a covering thread that expresses a soft texture, and further reduces the rubber touch peculiar to elastic fibers while wearing the pressure stockings. An object of the present invention is to provide a stocking that expresses a soft texture and is excellent in transparency.

In order to solve this problem, the present invention employs the following configuration.
(1) A single covering yarn using an elastic fiber having a fineness of 30 to 80 dtex as the core yarn of the covering yarn and a polyamide multifilament of 8 to 15 dtex as the wound yarn, and the coverage C calculated by the following formula A covering yarn characterized in that the yarn is 80% or more.
Length L (μm) when polyamide multifilaments are arranged in a row

Perimeter length R (μm) when surrounding elastic fiber with polyamide multifilament

Coverage C (%) = L / R × 100
Where Dn = polyamide multifilament fineness (dtex)
Du = fineness of elastic fiber (dtex)
f = number of polyamide multifilament filaments Da = polyamide multifilament density (g / cm ³ )
Db = density of elastic fiber (g / cm ³ )
(2) The covering yarn according to (1), wherein the polyamide multifilament has a single yarn fineness of 0.5 to 0.9 dtex.
(3) A pressure stocking characterized in that the covering yarn according to (1) or (2) is used for at least one part of a leg part.

  In the present invention, when the covering yarn employing the above-described configuration is used for a pressure stocking or the like, the rubber touch peculiar to the elastic fiber can be reduced and a soft texture can be expressed while maintaining transparency.

  As a configuration of the present invention, an elastic fiber having a fineness of 30 to 80 dtex is used as the core yarn of the covering yarn, and a coverage C is 80% as a single covering yarn using a polyamide multifilament of 8 to 15 dtex as the wound yarn. It is the covering yarn characterized by the above.

  That is, a polyamide multi-fiber of 8 to 15 dtex, which has a fineness of 30 to 80 dtex, which is relatively fine as that used for stockings in spite of the use of elastic fibers with a relatively large fineness of 30 to 80 dtex. In a single covering yarn coated with filaments, the coverage of elastic fibers with polyamide multifilaments is 80% or more.

  Stockings using covering yarn are roughly divided into two types. The leg part is composed of covering yarn, so-called zock, and knit knitting in which covering yarn and raw yarn (knitting yarn) are alternately knitted. In any case, the fineness of the elastic fiber used for the covering yarn is widely used at about 20 dtex.

  Here, the elastic fiber having a fineness of 30 to 80 dtex has a relatively large fineness and is used for a pressure stocking, an inner use having a high correction effect, and the like. Here, the pressure stocking means a sock pressure measuring machine made by Hatler mk. When the clothing pressure at the ankle portion is measured using 3, it is about 11 hPa or higher, which is higher than about 7 hPa in ordinary stockings, and has a high tightening effect. Although there is a high need for tightening feeling and a high correction effect, there is a problem in that it is not covered with the polyamide multifilament that is a wound thread because of its fineness, and that rubber touch is caused by high contact pressure. In particular, in the pressure stocking, transparency is important, and it is demanded not to increase the fineness of the polyamide multifilament, and it has been difficult to sufficiently cover it.

  Therefore, in the present invention, the balance of the fineness of the elastic fiber and the fineness / number of filaments of the polyamide multifilament is balanced, and the single yarn fineness of the polyamide multifilament is reduced to improve the covering property and reduce the rubber touch feeling. , Pursuing the softness of the texture due to the fineness of the single yarn.

  Specifically, the fineness of the polyamide multifilament used as the winding yarn for the covering yarn is 8 to 15 dtex. Among them, the fineness of the polyamide multifilament is more preferably 9 to 13 dtex from the balance between durability and transparency, and 10 to 12 dtex is particularly preferable for the same reason. If it is less than 8 dtex, the strength that can withstand relatively thick elastic fibers cannot be obtained, which is not preferable because it causes a problem in durability. On the other hand, if it exceeds 15 dtex, the durability is excellent, but the transparency is significantly lowered.

  The reason why the polyamide multifilament is used as the winding yarn for the covering yarn is that it is most practical from the viewpoint of wear characteristics and softness as well as the burst strength.

  The polyamide as used in the present invention is a high molecular weight product in which a so-called hydrocarbon group is connected to the main chain through an amide bond, and is preferably a polycaproate mainly from the viewpoint of excellent dyeability, fastness to washing and mechanical properties. An amide or a polyamide such as polyhexamethylene adipamide is preferred. The term “mainly” as used herein means that it is 80 mol% or more as a ε-caproamide unit constituting it in polycaproamide, and as a hexamethylene adipamide unit constituting it in polyhexamethylene adipamide, Preferably it is 90 mol% or more. Other components are not particularly limited, but in the case of polycaproamide, hexamethylene adipamide units, in the case of polyhexamethylene adipamide, in addition to caproamide units, for example, polydodecanoamide, polyhexaamide. Aminocarboxylic acid, which is a monomer constituting methylene azeramide, polyhexamethylene sebacamide, polyhexamethylene dodecanoamide, polymetaxylylene adipamide, polyhexamethylene terephthalamide, polyhexamethylene isophthalamide, Units such as dicarboxylic acid and diamine may be mentioned.

  The degree of polymerization of the polyamide referred to in the present invention may be appropriately selected in consideration of the required yarn strength, the initial tensile resistance, etc., but a 98% sulfuric acid relative viscosity is preferably in the range of 2.0 to 3.5.

  Furthermore, a light stabilizer, a heat stabilizer, an antioxidant, an antistatic agent, a terminal group modifier, a dyeability improver, and the like may be added as necessary. In addition, inorganic particles and organic functional agents can be added to impart ultraviolet absorption, contact cooling, antibacterial properties, and the like. However, the addition of inorganic particles exceeding 1 μm is not preferable because the spinning property and durability are deteriorated, and the addition of inorganic particles including white pigments is not limited, but is 2.0% by weight in the fiber. It is preferable that it is below, and it is more preferable that it is less than 1.0 weight% in a fiber.

  As a covering form, the covering yarn of the present invention is a single covering. In the case of double covering, the covering property is improved and the rubber touch is reduced. However, since the diameter of the covering yarn is increased, the transparency is lowered and the extensibility is further lowered.

  An elastic fiber having a fineness of 30 to 80 dtex is used as the core yarn of the covering yarn. When the fineness is less than 30 dtex, the feeling of tightening is not sufficient, and when the fineness exceeding 80 dtex is used, the feeling of tightening is too strong. Therefore, it is necessary to improve coverage by performing double covering or to use a polyamide multifilament with a larger fineness. Therefore, it is necessary to make this range in order to maintain transparency while obtaining an appropriate tightening feeling. For the same reason, 33 to 50 dtex is more preferable, and 35 to 45 dtex is particularly preferable as the balance between transparency and tightening feeling.

  As elastic fibers, polyurethane-based elastic fibers, polyamide-based elastomer elastic fibers, polyester-based elastomer elastic fibers, natural rubber-based fibers, synthetic rubber-based fibers, butadiene-based fibers, etc. are used. Elastic properties, heat setting properties, durability, etc. May be selected as appropriate. Among these, polyurethane elastic fibers are preferable from the above characteristics.

  The covering twist number may be designed in consideration of the fineness, shrinkage, product texture, transparency, and durability of the coated yarn. Increasing the number of covering twists reduces the apparent thickness, which tends to improve transparency, but if it is increased too much, it is preferable because the elastic yarn is tightened too much and the durability decreases or the productivity of the covering process decreases. Absent. On the other hand, if the covering twist number is too low, the covering property is lowered and the durability and transparency are lowered. Therefore, for example, when single-covering 11 decitex coated yarn, it is preferable to design 1800-2400 T / m as a guide. Further, the draft magnification may be designed in accordance with the elastic fiber to be used and the target pressure, and it is generally preferably set to 2.5 to 3.5 times.

  In addition, what is necessary is just to implement a usual covering process when manufacturing a covering thread | yarn. For example, the processing described in the encyclopedia of fibers (Maruzen Co., Ltd., issued on March 25, 2002, p439) may be performed. That is, for example, the elastic fiber is drawn out at a constant speed, and the wound yarn wound around the H bobbin is wound around the elastic fiber with a constant covering twist number in a state where a constant draft is applied between the two rollers. The covering yarn is wound around cheese.

In the present invention, the relationship between the fineness of the elastic fiber used, the single yarn fineness of the coated yarn, and the number of filaments is selected so that the covering ratio C of the covering yarn defined below is 80% or more.
Length L (μm) when polyamide multifilaments are arranged in a row

Perimeter length R (μm) when surrounding elastic fiber with polyamide multifilament

Coverage C (%) = L / R × 100
Where Dn = polyamide multifilament fineness (dtex)
Du = fineness of elastic fiber (dtex)
f = number of polyamide multifilament filaments Da = polyamide multifilament density (g / cm ³ )
Db = density of elastic fiber (g / cm ³ )

  Here, L is the length when the polyamide multifilaments are arranged in a line, assuming that the polyamide multifilament has a round cross section and the single yarn fineness is constant as shown in FIG. That is, the length that can be covered by the multifilament is shown. On the other hand, R is assumed that the elastic fiber is a monofilament and is stretched three times when worn, and when the wound yarn is in contact with the elastic fiber, a line segment connecting the center of the elastic fiber to the center of the wound yarn is defined as a radius. Means the circumference. That is, it means the length necessary to cover the elastic fiber when worn. In other words, the coverage C (%) is the ratio of the length required to cover the elastic fibers at the time of wearing to the length of the single yarn of the polyamide multifilament that can be covered in a single row (%) (L / R) × 100).

The density of the polyamide multifilament is Da. The density of the elastic fiber is Db. In addition, the density of the polyamide multifilament and the elastic fiber differs depending on the type of the constituent material. The polyamide is 1.14 g / cm ³ in the case of polycaproamide or polyhexamethylene adipamide. For elastic fibers, it is generally 1.0 to 1.3 g / cm ³ . Furthermore, the assumption that the elastic fiber is stretched three times when worn assumes the thickness of the elastic fiber when worn.

  Based on the above formula, in the model in which the wound yarn is covered around the elastic fiber so that the wound yarn is wound around the elastic fiber at an angle of about 45 ° with the elastic fiber stretched, the outer circumference of the elastic fiber It can be considered how much polyamide multifilament can be coated.

  That is, in the above model, when the cross section is observed in the direction perpendicular to the fiber axis direction of the covering yarn with the elastic fiber stretched, it is coated with √2 times the single yarn diameter of the polyamide multifilament. Further, when a polyamide multifilament is arranged around the elastic fiber, a part thereof may overlap and may not contribute to the covering property. In order to obtain sufficient coverage when worn, the rubber touch is reduced when actually worn as a pressure stocking if the coverage C in the above formula is 80% or more in consideration of these. .

  The polyamide multifilament used in the present invention preferably has a round cross section. This is because a round cross section has no directionality in the force required for bending, and can feel softness when the single yarn is thin. Even when considering the product texture, the cross-sectional shape is preferably a round cross-section. The single yarn fineness is preferably as constant as possible. This is because when the fineness varies, it becomes a dyeing difference and easily becomes a defect. The elastic fiber also preferably has a round cross section, and since it is easy to obtain transparency, it is preferably a monofilament.

  The core yarn of the covering yarn of the present invention uses an elastic fiber having a fineness of 30 to 80 dtex, but the rubber touch is reduced by controlling the single yarn fineness and the number of filaments of the polyamide filament so that the coverage is 80% or more. Thus, a pressure stocking excellent in wearing feeling can be obtained. If it is less than 80%, a rubber touch specific to the elastic fiber of the covering rate is felt, and slipping is poor and uncomfortable feeling is felt.

  In addition, when the elastic fiber normally used for stockings is less than 30 dtex, the feeling of tightening is not high, so that rubber touch is not a problem.

  In order to feel the reduction of rubber touch and feel the softness of the texture, 85% or more is more preferable, and 90% or more is particularly preferable for the same reason. On the other hand, when the coverage is excessively high, it causes a decrease in transparency and a single yarn breakage during wearing. Therefore, it is preferably 150% or less, more preferably 130% or less, particularly 110% or less for the same reason. preferable.

  In order to increase the coverage C to 80% or more, as described above, the balance between the fineness of the elastic fiber and the fineness and the number of filaments of the polyamide multifilament, and the single yarn fineness of the polyamide multifilament is reduced. Can be improved. At the same time, the softness of the texture can be realized by reducing the single yarn fineness of the polyamide multifilament. In particular, when a covering yarn having a fineness of elastic fiber of 30 dtex or more and a thick fineness is used, an ordinary wound yarn having a single yarn fineness of 1.8 to 3 dtex is likely to feel a coarse feeling in the texture (the elastic fiber is 20 dtex). If it is, the texture will not be a problem if it is this single yarn fineness). Therefore, in order to more effectively express the softness of the texture, it is effective to reduce the single yarn fineness. This also directly leads to improvement in coverage. Therefore, it is preferable that the single yarn fineness of the polyamide multifilament which is a wound yarn of the covering yarn is 0.5 to 0.9 dtex. Among them, the single yarn fineness is more preferably 0.5 to 0.8 dtex from the balance of friction durability, transparency and texture, and 0.6 to 0.8 dtex is particularly preferable for the same reason. The number of polyamide multifilaments may be selected so that the coverage C is in the range of the above formula.

  The method for obtaining the polyamide multifilament of the present invention by the direct spinning method is not limited as long as the polyamide multifilament of the present invention is obtained. As an example, there is uniflow type cooling in which cooling air is applied in a direction perpendicular to the yarn traveling direction and in one direction in the vicinity of the base while keeping the base warm.

  On the other hand, in order to obtain a polyamide multifilament having a single yarn fineness, the molten polymer is discharged from a base having an annular discharge hole, and the radial direction from the center of the base or the circumferential direction so as to surround the base discharge hole. It is preferable to use a so-called annular cooling device that flows cooling air toward the center of the base. The cooling start distance is preferably a relatively close distance of 10 to 100 mm from the base surface. The cooling length is preferably about 100 to 1000 mm.

  After cooling, refueling with a refueling guide, taking up at about 1500 to 4500 m / min (first gody roller), and stretching about 1.0 to 2.5 times with the next second gody roller And can be wound up at 3000 m / min or more. At this time, the aim is to appropriately design the draw ratio between the first and second godet rollers (the higher the draw ratio, the lower the elongation) and the take-up speed (lower the take-up speed). It is possible to obtain the following elongation. In addition, it is preferable to perform the heat treatment by using the second godie roll as a heating roll at 150 to 170 ° C. There is no problem with each godie roll, either a Nelson roller, a drive roller with a driven separation roller, or a one-sided roller. Further, the surface state of the roller may be smoothed in order to suppress slippage between the roller and the filament, the second godet roll may be provided with a groove in order to improve yarn separation, or a satin finish.

  The oil agent is applied to the multifilament by guide oiling or the like, and the amount of the active ingredient attached during winding is preferably about 0.8 to 1.3% by weight per multifilament weight. The application of the oil agent is not a problem even if it is performed once or a plurality of times during the spinning process. When performing by dividing into multiple times, it is preferable to apply an oil agent having a high active ingredient amount after applying an oil agent having a low active ingredient amount.

  As the oil agent, a lubricant, an antistatic agent, an emulsifier, an additive and the like can be mixed and dispersed. Examples of lubricants include aliphatic esters, polyethers, mineral oils and the like. As an example of the antistatic agent, an ionic surfactant such as an anionic surfactant, a cationic surfactant, and an amphoteric surfactant can be applied. As the emulsifier, a nonionic emulsifier can be applied, and as the additive, a fluff inhibitor, a permeability improver, an appearance modifier, an antioxidant, an antiseptic, and the like can be appropriately used.

  Increasing the strength of the polyamide multifilament is also effective for improving the durability of the stockings. Specifically, the strength is preferably 5.0 cN / T or more and the elongation is 40 to 50%. Higher strength is more preferable, but even if the strength is increased to a low elongation, in knitting, the number of yarns shared by the force is reduced at the time of rupture. Reduces strength. For the same reason, the strength is more preferably 5.5 cN / T or more and particularly preferably 6.0 cN / T while maintaining the elongation. On the other hand, if the design is too low to increase the strength, knitting becomes difficult, and the texture of the knitted fabric tends to become coarse and hard, so the strength is preferably 8.0 cN / T or less.

  As a means for setting the strength to 5.0 cN / T or more and the elongation of 40 to 50%, a preferred mode is shown below, but is not limited thereto. The degree of polymerization of the polyamide is preferably in the range of 2.5 to 3.5 in terms of 98% sulfuric acid relative viscosity. Moreover, after taking up at about 1800 to 3000 m / min (first godet roller) and stretching about 1.3 to 2.5 times with the next second godet roller, it is about 3000 to 4500 m / min. A winding method is preferred. At this time, the aim is to appropriately design the draw ratio between the first and second godet rollers (the higher the draw ratio, the lower the elongation) and the take-up speed (lower the take-up speed). It is possible to obtain the following elongation. Furthermore, the strength can be increased by performing heat treatment by using the second godet roll as a heating roll at 150 to 170 ° C.

  By using the covering yarn of the present invention for a stocking, it becomes a stocking with a soft texture in which the rubber touch, which is a problem as a pressure stocking, is reduced as well as having a moderate tightening feeling and transparency. Here, stockings include stockings products represented by pantyhose, long stockings, and short stockings, and the leg portion refers to a range from a garter portion to a toe in the case of pantyhose, for example.

  Further, a normal sock knitting machine can be used as a knitting machine for stockings, and there is no limitation. A normal method of knitting by supplying a covering yarn of the present invention using a knitting machine having two or four necks. You can organize with. In the case of a so-called zock stocking composed only of a covering yarn, a method of alternately knitting a single covering yarn of S direction covering and a single covering yarn of Z direction covering is suitable. Other examples include knitting of single covering yarn and raw yarn. In particular, a so-called zock stocking composed only of covering yarn is preferable because it can provide a clean fabric surface without so-called fringes and a soft texture.

  Furthermore, the number of needles of the knitting machine is generally 300 to 440. The smaller the number of needles, the higher the transparency, but the lower the burst strength, and the larger the number of needles, the higher the burst strength, Sex tends to decline. Therefore, it can be selected according to the winding thread to be used, the fineness of the elastic fiber and the intended durability, transparency, and pressure. As an example, when the wound yarn is 11 dtex and the elastic fiber is 42 dtex, the number of needles is preferably 360 to 400.

  Furthermore, dyeing after knitting, subsequent post-processing, and final set conditions may be performed according to known methods, and the use of acid dyes and reactive dyes as dyes and of course colors are not limited.

  The covering yarn is excellent in color developability, covering property and touch, and is preferably used for circular knitting for skin wear. When used as underwear, a part of or all of the circular knitted supply yarn is used as the covering yarn, so that an appropriate tightening feeling and a soft texture can be obtained.

  Hereinafter, the present invention will be described more specifically with reference to examples.

  In addition, each measured value in an Example and a comparative example was obtained with the following method.

A. Fineness JIS L 1013-1999 8.3.1 Fineness Fineness was measured according to the positive fineness A method.

B. Density Measurement was carried out according to JIS L 1013-1999 8.17.2 density (density tube method).

C. 98% sulfuric acid relative viscosity (ηr)
(A) A sample is weighed and dissolved in 98% by weight concentrated sulfuric acid so that the sample concentration (C) is 1 g / 100 ml.
(B) The solution (a) is measured for the number of seconds (T1) dropped at 25 ° C. using an Ostwald viscometer.
(C) The falling seconds (T2) at 25 ° C. of 98 wt% concentrated sulfuric acid in which the sample is not dissolved are measured in the same manner as in the item (2).
(D) The 98% sulfuric acid relative viscosity (ηr) of the sample is calculated by the following equation. The measurement temperature is 25 ° C.
(Ηr) = (T1 / T2) + {1.891 × (1.000−C)}.

D. Strength / Elongation Measurement JIS L 1013-1999 8.5.1 Tensile Strength and Elongation Rate Measurement was performed according to a standard time test. As the test conditions, the type of the tester was a constant speed tension type with a grip interval of 50 cm. In addition, strength (cN / dtex) = tensile strength (cN) / fineness (dtex)

E. Stocking evaluation Three stocking development experts wore to the thigh and evaluated the pressure, transparency and texture.
(A) Rubber touch: Current pressure contact commercial product (Zock pantyhose using covering yarn of core yarn 38 dtex, winding yarn 11 dtex 8 filament) is set to △, and rubber touch from the slipperiness and touch when wearing thigh than this As a result, a good product is indicated by ◯, and a bad product is indicated by ×.
(B) Contact pressure: The level of tightening is usually a commercially available product (Zocchi pantyhose using covering yarn of core yarn 22 dtex, winding thread 11 dtex 5 filament), and the tightening pressure is higher in the order of strong → stronger → very strong Yes.
(C) Transparency: A commercially available product (core yarn 22 dtex, wound yarn 11dtex 5 covering zock pantyhose using a covering yarn) is marked with ◎, and as the transparency falls, it is marked with ◯ → Δ → x.
(D) Texture: Touch the calf part while wearing it, and the level of a normal commercial product (core thread 22T, wound thread 11dtex5 filament covering thread) is excellent, and the texture is excellent ◎ → ○ → △ → x.
(E) Burst strength: After putting the stocking product in the foot shape, aligning the garter part at a position of 60 cm from the heel to the thigh, and centering on the position of 52.5 cm from the heel to the thigh, A circular mark is put on the back side of the thigh of the foot shape according to the size of the measurement frame. When the product is fixed to the measurement frame, the burst strength is measured in the same state as the wearing state by fixing it in accordance with the circular mark attached in advance. The burst strength was measured according to JIS L1018-1999 8.17.2 B method (constant speed extension type method).

  The foot shape was created to resemble a human foot, the length from the toes to the heel is 23.5 cm, the circumference of the arch part 13.5 cm away from the toes to the sole of the foot is 22.5 cm, The circumference of the ankle 8cm from the heel to the thigh is 22cm, the circumference of the calf 25cm from the heel to the thigh is 34.5cm, and the circumference of the back of the knee 43cm from the heel to the thigh 37 cm, the circumference of the thigh of 50 cm from the heel to the thigh is 39.5 cm, and the circumference of the thigh of 60 cm from the heel to the thigh is 48 cm.

Example 1
A polycaproamide chip containing 98% sulfuric acid relative viscosity of 2.8 and not containing titanium oxide is melted at 280 ° C, discharged from a circular discharge hole arranged in a ring shape in the spinneret, and cooled inward from a cylindrical filter. Cooling is performed using an internal blown annular cooling device (cooling start distance from the base surface: 36.5 mm, cooling length: 300 mm) that blows air, and then 0.30 ml / min of an oil agent (fatty acid ester as an oil agent active ingredient) from an oil supply guide , Including nonionic emulsifier and antistatic agent), oil is supplied to the multifilament, entangled with the entanglement nozzle (compressed air pressure 0.2MPa), and then taken up by placing it on the first godet roller. Then, after stretching with a second godet roller so that the elongation becomes 45%, it is put on a second godie roller heated at 155 ° C. Taken up at 4000 m / min after a heat treatment afforded the polyamide multifilament of 11 dtex 16 filament (strength 5.6cN / dtex, elongation 45%, a density 1.14g / ^cm 3). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

“Mobilon” K-type 42 dtex-1 filament (Nisshinbo Co., Ltd., density 1.20 g / cm ³ ) is used as the core yarn of the covering yarn, and the covering is performed at a draft magnification of 3.5 times and a covering twist number of 2400 T / m. It was. The coverage C at this time was 94%.

  Using the above-mentioned covering yarn, the S-direction single covering yarn and the Z-direction single covering yarn are alternately supplied to the yarn feeder of the knitting machine with a super 4 knitting machine (400 stitches) manufactured by Nagata Seiki Co., Ltd. Part knitted fabric was knitted only with covering yarn. Scouring and dyeing (98 ° C. × 20 min), finishing, and template setting (steam set, 110 ° C. × 60 sec) were made into pantyhose products.

  The obtained pantyhose had a soft texture when the calf was touched. Further, for example, when the stocking of Comparative Example 1 was worn, it was stretched greatly, so that the thigh where a rubber touch was felt was not felt in the stocking of Example 1, and the texture was good.

Example 2
A polyhexamethylene diamide chip containing 98% sulfuric acid relative viscosity of 2.8 and not containing titanium oxide was melted at 290 ° C., and discharged from a circular discharge hole arranged in a ring shape in the spinneret. After cooling by using, the same oil agent as in Example 1 was discharged from the oiling guide at 0.22 ml / min to supply oil to the multifilament, and entangled with the entanglement nozzle (compressed air pressure 0.2 MPa), then the first Take-up is carried out by placing it on a godet roller, and after that, it is stretched with a second godie roller so that the elongation becomes 45%, and then heat-treated by being placed on a second godie roller heated at 155 ° C. After that, it was wound up at 4000 m / min to obtain a polyamide multifilament having 8 dtex and 14 filaments (strength 5.8 cN / dtex, elongation) 5%, a density 1.14g / ^cm 3). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

Covering is performed at a draft magnification of 3.5 times and a covering twist number of 2800 T / m using “Mobilon” K type 38 dtex-1 filament (Nisshinbo Co., Ltd., density 1.20 g / cm ³ ) as the core yarn of the covering yarn. It was. The coverage C at this time was 80%.

  Stockings were knitted using the same sock knitting machine as in Example 1 using the above-mentioned covering yarn, and dyed and finished in the same manner as in Example 1 to obtain a pantyhose product.

    The obtained pantyhose had a soft texture when the calf was touched. Further, for example, when the stocking of Comparative Example 1 was worn, it was stretched greatly, so that the thigh where a rubber touch was felt was not felt in the stocking of Example 2, and the texture was good.

Example 3
“Mobilon” K type 56 dtex-1 filament (manufactured by Nisshinbo Co., Ltd., density 1.20 g / cm ³ ) was used as the core yarn of the covering yarn, and the polyamide multifilament used in Example 1 was used as the wound yarn. The covering was performed at a covering twist number of 2400 T / m. The coverage C at this time was 84%.

  Stockings were knitted using MODEL KT-S4 (360 stitches) manufactured by Nagata Seiki Co., Ltd. using the covering yarn, and dyed and finished in the same manner as in Example 1 to obtain pantyhose products.

  The obtained pantyhose had a soft texture when the calf was touched. Further, for example, when the stocking of Comparative Example 1 was worn, it was stretched greatly, so that the thigh where a rubber touch was felt was not felt in the stocking of Example 3, and the texture was good.

Example 4
The polycaproamide chip used in Example 1 was melted at 280 ° C., discharged from a circular discharge hole arranged in a ring shape in the spinneret, cooled using the same cooling device as in Example 1, and then from the oiling guide. The same oil agent as in Example 1 was discharged at 0.35 ml / min to supply oil to the multifilament, entangled with an entanglement nozzle (compressed air pressure 0.2 MPa), and then taken up by placing it on the first godet roller. Followed by stretching with a second godet roller so that the elongation becomes 45%, and then heat-treating it by hanging on a second godet roller heated at 155 ° C., and then winding at 4000 m / min. A polyamide multifilament of 13 dtex 18 filaments was obtained (strength 5.6 cN / dtex, elongation 45%, density 1.14 g / cm ³ ). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

“Mobilon” K type 78 dtex-1 filament (Nisshinbo Co., Ltd., density 1.20 g / cm ³ ) is used as the core yarn of the covering yarn, and the covering is performed at a draft magnification of 3.5 times and a covering twist number of 2300 T / m. It was. The coverage C at this time was 84%.

  Stockings were knitted using the same sock knitting machine as in Example 3 using the covering yarn, and dyed and finished in the same manner as in Example 1 to obtain a pantyhose product.

  The obtained pantyhose had a soft texture when the calf was touched. Further, for example, when the stocking of Comparative Example 1 was worn, it was stretched greatly, so that the thigh where the rubber touch was felt was not felt in the stocking of Example 4, and the texture was good.

Comparative Example 1
The polycaproamide chip used in Example 1 was melted at 280 ° C., discharged from a round discharge hole arranged on the entire surface of the spinneret, and cooled using a uniflow type cooling device that blows cooling air in one direction from one side. Then, 0.35 ml / min of the same oil agent as in Example 1 was discharged from the oiling guide to supply oil to the multifilament, and entangled with the entanglement nozzle (pressure / air pressure 0.2 MPa), and then placed on the first godet roller. Then, after drawing between the second godet rollers so that the elongation becomes 45%, heat treatment is performed by placing them on the second godie roller heated at 155 ° C. Winding in minutes, a polyamide multifilament of 13 dtex 10 filaments was obtained (strength 6.0 cN / dtex, elongation 45%, density .14g / ^cm 3). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

“Mobilon” K-type 42 dtex-1 filament (Nisshinbo Co., Ltd., density 1.20 g / cm ³ ) is used as the core yarn of the covering yarn, and covering is performed at a draft magnification of 3.5 times and a covering twist number of 2300 T / m. It was. The coverage C at this time was 76%.

  Stockings were knitted using the same sock knitting machine as in Example 1 using the above-mentioned covering yarn, and dyed and finished in the same manner as in Example 1 to obtain a pantyhose product.

  The obtained pantyhose lacked a soft texture as compared with the product of Example 1 when the calf was touched. In addition, when worn, a rubber touch was felt in the thighs more than in Example 1.

Comparative Example 2
The polycaproamide chip used in Example 1 was melted at 280 ° C., discharged from a round discharge hole arranged on the entire surface of the spinneret, and cooled using a uniflow type cooling device that blows cooling air in one direction from one side. Then, 0.30 ml / min of the same oil agent as in Example 1 was discharged from the oiling guide to supply oil to the multifilament, and entangled with the entanglement nozzle (compressed air pressure 0.2 MPa), and then laid on the first godet roller Then, after drawing between the second godet rollers so that the elongation becomes 45%, heat treatment is performed by placing them on the second godie roller heated at 155 ° C. Winding in minutes, a polyamide multifilament of 11 dtex 8 filaments was obtained (strength 6.0 cN / dtex, elongation 45%, density 1 14g / ^cm 3). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

“Mobilon” K-type 42 dtex-1 filament (Nisshinbo Co., Ltd., density 1.20 g / cm ³ ) is used as the core yarn of the covering yarn, and the covering is performed at a draft magnification of 3.5 times and a covering twist number of 2400 T / m. It was. The coverage C at this time was 62%.

  Stockings were knitted using the same sock knitting machine as in Example 1 using the above-mentioned covering yarn, and dyed and finished in the same manner as in Example 1 to obtain a pantyhose product.

  The obtained pantyhose lacked a soft texture as compared with the product of Example 1 when the calf was touched. In addition, when worn, a rubber touch was felt in the thighs more than in Example 1.

Comparative Example 3
The polycaproamide chip used in Example 1 was melted at 280 ° C., discharged from a round discharge hole arranged on the entire surface of the spinneret, and cooled using a uniflow type cooling device that blows cooling air in one direction from one side. Then, 0.30 ml / min of the same oil agent as in Example 1 was discharged from the oiling guide to supply oil to the multifilament, and entangled with the entanglement nozzle (pressure air pressure 0.25 MPa), and then hanged on the first godet roller Then, after drawing between the second godet rollers so that the elongation becomes 45%, heat treatment is performed by placing them on the second godie roller heated at 155 ° C. Winding in minutes, a polyamide multifilament with 11 dtex 5 filaments was obtained (strength 6.0 cN / dtex, elongation 45%, density .14g / ^cm 3). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

“Mobilon” K-type 22 dtex-1 filament (Nisshinbo Co., Ltd., density 1.20 g / cm ³ ) is used as the core yarn of the covering yarn, and covering is performed at a draft magnification of 3.0 times and a covering twist number of 2400 T / m. It was. The coverage C at this time was 57%.

  Stockings were knitted using the same sock knitting machine as in Example 1 using the above-mentioned covering yarn, and dyed and finished in the same manner as in Example 1 to obtain a pantyhose product.

  The obtained pantyhose was insufficient compared to the tightening pressure aimed by the present invention because the fineness of the elastic fiber was finer than that of the product of Example 1. Therefore, when worn, no rubber touch was felt on the thigh.

Comparative Example 4
A Wool false twisted yarn (density 1.14 g / cm ³ ) of 33 dtex 26 filament made of polyhexamethylene diamide was used as the winding yarn for the covering yarn, and “Mobilon” K type 42 dtex-1 used in Example 1 as the core yarn for the covering yarn. Covering was performed using a filament (manufactured by Nisshinbo Co., Ltd., density 1.20 g / cm ³ ) at a draft magnification of 3.5 times and a covering twist of 1000 T / m. The coverage C at this time was 191%.

  Stockings were knitted using the same sock knitting machine as in Example 3 using the covering yarn, and dyed and finished in the same manner as in Example 1 to obtain a pantyhose product.

  The obtained pantyhose has a large total fineness of the wound yarn and uses a woolly false twisted yarn, so the covering property is sufficient, and in the thigh, a rubber touch was not felt, but so-called tights, It lacked transparency compared to the examples.

  When Example 1 and Comparative Examples 1 to 4 are compared as products, Example 1 and Comparative Examples 1, 2, and 4 are equivalent in terms of tightening pressure, but Comparative Example 3 has a fineness of the elastic fiber. For this reason, the feeling of tightening was insufficient for the purpose of the present invention. Moreover, when the transparency was compared in the calves when worn, Comparative Example 3 had the highest transparency. This is because the elastic fiber is fine. Next, Comparative Example 2, which was slightly inferior, was Example 1. This is because, although the total fineness of the polyamide multifilament is equal, when the number of filaments increases, the reflected light increases and the transparency is slightly lowered. Further, Comparative Example 1 was large and inferior in transparency as compared with Example 1. This is because the total fineness of the polyamide multifilament is a large fineness, which is greatly influenced.

  Also, the transparency of Comparative Example 4 was greatly reduced compared to Examples 3 and 4.

  On the other hand, in the rubber touch on the thigh when worn, Comparative Example 3 was not a problem because the feeling of tightening of the pressure was moderate. The rubber touch was felt most in Comparative Example 2, and then Comparative Example 1 was felt. On the other hand, in Example and Comparative Example 4, the rubber touch which becomes a problem was not felt.

  Moreover, when the texture of Example 1 and Comparative Examples 1-3 was evaluated by touching the part of the calf in a worn state, Example 1 felt the softest, and was far away from Comparative Example 1. Then, Comparative Example 2 and Comparative Example 3 were obtained. Although Comparative Example 4 has a texture using Woolley false twisted yarn, it is insufficient in the sense of the softness of the texture due to the fineness of single yarn aimed by the present invention.

  Furthermore, when durability as a stocking was evaluated by bursting strength, Examples 1, 3, and 4 were more excellent as durability as a pressure stocking.

Illustration of length L when polyamide multifilaments are arranged in a row Perimeter length R when elastic fiber is surrounded by polyamide multifilament

Explanation of symbols

a: single yarn cross section of wound polyamide multifilament, b: cross section of elastic fiber stretched 3 times

Claims (3)

A single covering yarn using an elastic fiber having a fineness of 30 to 80 dtex as the core yarn of the covering yarn and a polyamide multifilament of 8 to 15 dtex as the wound yarn, and the coverage C calculated by the following formula is 80% A covering yarn characterized by the above.
Length L (μm) when polyamide multifilaments are arranged in a row

Perimeter length R (μm) when surrounding elastic fiber with polyamide multifilament

Coverage C (%) = L / R × 100
Where Dn = polyamide multifilament fineness (dtex)
Du = fineness of elastic fiber (dtex)
f = Number of polyamide multifilaments Da = Polyamide multifilament density (g / cm ³ )
Db = density of elastic fiber (g / cm ³ ) The covering yarn according to claim 1, wherein the single yarn fineness of the polyamide multifilament is 0.5 to 0.9 dtex. 3. A pressure stocking comprising the covering yarn according to claim 1 or 2 as at least a part of a leg portion.

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