JP5298568B2 - Covering yarn and pressure stocking using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a covered yarn capable of exhibiting required soft feeling when used for compression stockings, and to provide the compression stockings using the covered yarn. <P>SOLUTION: The covered yarn is obtained using an elastic fiber having 30-80 dtex fineness as a core yarn of the covered yarn, and a fiber having 8-15 dtex fineness, 0.6-1.0 dtex single fiber fineness, and a cross section having 1.5-5.0 ovality and linear symmetry based on the major axis as a covering yarn. The stockings are obtained using the covered yarn at least at parts of the leg parts. <P>COPYRIGHT: (C)2009,JPO&amp;INPIT

Description

  The present invention, when used for a pressure stocking, uses a covering yarn that has extremely high softness to the touch and can reduce the uncomfortable feeling of tightening caused by the use of elastic fibers having a large fineness. It relates to stockings.

  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 have thicker elastic fibers than ordinary stockings, but the polyamide multifilaments are not much changed in comparison with ordinary stockings in consideration of transparency. In addition, the fineness of the single yarn is reduced to soften the touch. This is because a pressure stocking with a strong feeling of tightening is required to have a fine single yarn fineness and a soft touch because the burden on the skin is large.

  On the other hand, it is proposed in Patent Document 1 to use a polyamide long fiber having a convex lens type cross-sectional shape to make the texture of the stocking smooth and enhance the smooth feeling. However, the core yarn specifically disclosed is not intended to be a pressure stocking as can be seen from the fact that a polyurethane elastic yarn of 20 dtex (18 denier) is used. Therefore, 7 denier 5 filaments are specifically used for the polyamide long fiber specifically shown, and even if it is diverted to a pressure stocking, a sufficient one cannot be obtained in the sense of pursuing the softness of the texture.

  Moreover, in patent document 2, the single yarn fineness which has the long axis curved in order to express a soft texture is 0.5-7 denier, and flatness is 2-5, The length of the arc of a flat cross section Coated elastic yarns and stockings using polyamide long fibers having a flat cross section with an angle corresponding to 70 ° to 180 ° have been proposed. The core yarn specifically disclosed here is about 20 dtex, and is not intended for the pressure stocking. Further, as the specifically disclosed wound yarns, only 12 denier 7 filaments and 15 denier 3 filaments and those having a relatively large single yarn fineness are exemplified. In addition, a flat cross section having a curved long axis is not only inferior in bendability compared to a flat cross section symmetric with respect to the long axis, but also has a direction of bendability. Is likely to occur, and the covering property of the covering is deteriorated.

Patent Document 3 discloses an example of a pressure pantyhose. Such a pressure stocking imparts a feeling of tightening to the leg part. As a specific example, an elastic yarn (31 dtex) is a double covering yarn having higher coverage than a single covering yarn using a polyamide multifilament of 8 dtex 5 filaments. Alternatively, the elastic yarn (33 dtex) is a single covering yarn using a 33 dtex Woolley nylon yarn having a large fineness. 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, although rubber touch is reduced, when using double covering yarn, the single yarn fineness is thick, so it becomes coarse and loses elasticity, and when using woolly nylon yarn with 33 dtex thick fineness, tights In addition, only those inferior in transparency were obtained.
JP-A-10-331029 (paragraph numbers [0008] to [0015]) JP-A-8-170221 (paragraph numbers [0004] to [0028]) JP 2005-273089 A (paragraph numbers [0003] to [0007], [0027], [0029])

  Accordingly, the present invention provides a covering thread and a stocking that reduce discomfort during wearing while further providing a covering thread by providing a covering thread that expresses a soft texture when used in a compression stocking. It is what.

In order to solve this problem, the present invention employs the following configuration.
(1) An elastic fiber having a fineness of 30 to 80 dtex is used as a core yarn of the covering yarn, a wound yarn is 8 to 15 dtex, a single yarn fineness is 0.6 to 1.0 dtex, and a flatness is 1.5 to 5.0. A covering yarn for pressure stockings, wherein the cross section of the fiber is a polyamide multifilament line-symmetric with respect to the major axis.
(2) A pressure stocking characterized in that the covering yarn according to claim 1 is used for at least one part of a leg part.

  When the covering yarn employing the above-described configuration is used for a pressure stocking or the like, the present invention can exhibit a soft texture and can reduce discomfort when wearing the pressure stocking.

As a configuration of the present invention, an elastic fiber having a fineness of 30 to 80 dtex is used as a core yarn of the covering yarn, a wound yarn is 8 to 15 dtex, a single yarn fineness is 0.6 to 1.0 dtex, and a flatness is 1.5. A covering yarn characterized in that it is a polyamide multifilament having a fiber cross-sectional shape of ˜5.0 and line symmetry with respect to the long axis.

  That is, elastic fibers having a fineness of 30 to 80 dtex and a relatively thick fineness are used for the core yarn, and further, it is 8 to 15 dtex that satisfies transparency and durability as a covering yarn for use as a winding thread, and a single yarn fineness of 0. By using a polyamide multifilament having a fine single yarn fineness of 6 to 1.0 dtex, a flatness of 1.5 to 5.0, and a line symmetry with respect to the major axis, it is extremely soft to bend. It becomes a wound thread.

  Here, the reason for setting the single yarn fineness to 0.6 to 1.0 dtex is to improve the bending softness by reducing the fineness. The thinner one is more effective, but less than 0.6 dtex is not preferable because the wear durability is maintained. On the other hand, a single yarn fineness exceeding 1.0 dtex is not preferable because it is difficult to feel softness.

  Moreover, the reason why the flatness is 1.5 to 5.0 dtex and the fiber cross-sectional shape is line-symmetric with respect to the major axis is because bending is soft and anisotropy is not created in bending. When the single yarn fineness is thin and the cross section is flat, bending becomes soft. In particular, since it is easy to bend in the minor axis direction, the covering property is improved and the touch feeling is extremely soft. Further, by making the line symmetric with respect to the long axis, the bending is soft, and the directionality of bending is not in the short axis direction. This is important as a wound yarn of a covering yarn, and when it is asymmetric and there is a difference in bendability, it is easy to reverse and deteriorates the covering property of the covering. Here, the fiber cross-sectional shape indicates a cross-sectional shape when the fiber is cut perpendicularly to the fiber axis direction. For flatness, cut a thin slice in the cross-sectional direction at an arbitrary position of the fiber, photograph 100 cross-sections of the fiber as a single yarn with a transmission microscope, print out at a magnification of 1000 times, and then use a scanner. The ratio L / S of the diameter L of the circumscribed circle OL and the diameter S of the inscribed circle IC is calculated using the image processing software (WINROOF) in a state where the image is captured (black and white photograph, 400 dpi) and magnified 1500 times on the display. And flatness = L / S was calculated | required from the number average value of the value obtained from 100 pieces.

  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 the needs are high due to the high tightening feeling and correction effect, since the pressure is high and the tightening feeling is strong, a normal winding thread (11 dtex-5 fil or 13 dtex-7 fil) feels coarse and hard. Polyamide multifilaments having a slightly fine yarn fineness (11 dtex-8 fil and 13 dtex -10 fil) round cross-section have been used. However, there is a high need for the softness of the texture, and a flat cross section in which the fiber cross-sectional shape is axisymmetric with respect to the major axis as the fineness of the single yarn is further reduced.
(1) The single yarn fineness is reduced, (2) the fiber cross-sectional shape is axisymmetric with respect to the long axis, and (3) the flat cross-section is satisfied simultaneously to satisfy the three. Alternatively, a soft texture that cannot be reached only by satisfying two of the three at the same time is obtained, and the covering property to the core yarn is improved. This is because the single yarn fineness is thin and the flat cross section makes it easy to bend in the minor axis direction. Further, since it is symmetric with respect to the long axis, it is easy to bend in either of the two directions of the short axis, which contributes to softness. Further, since the reversal during covering due to the occurrence of a direction that is easy to bend as in the case where the line is not line symmetric with respect to the long axis does not occur, the core yarn is wound neatly and the covering property is improved. . In the present invention, the term “being line symmetric” does not require that each single yarn is strictly line symmetric, and may be substantially line symmetric. The reason for this is that there may be some fluctuations due to factors such as fluctuations in conditions when discharging and spinning using a die for discharging fibers having a line-symmetric cross section.

  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, addition of inorganic particles exceeding 1 μm is not preferable because the spinning property and durability are lowered, 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 preferably a single covering. When covered with double covering, the rubber touch is reduced because the coverage is improved, but depending on the covering conditions, the diameter of the covering yarn becomes thick, which is not preferable because the transparency is lowered and the extensibility is further lowered. Care must be taken as there are cases.

  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 exceeds 80 dtex, the covering is improved by performing double covering so that the core yarn is not exposed because the core yarn is thick. In order to maintain transparency while obtaining an appropriate tightening feeling, it is necessary to use this range. 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. However, increasing the number of covering twists tends to decrease the durability due to excessive tightening of the elastic yarn, and the productivity of the covering process tends to decrease. Therefore, it is not preferable. On the other hand, if the covering twist number is too low, the covering property tends to be lowered and the durability and transparency tend to be 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.

  The elastic fiber preferably has a round cross section, and since it is easy to obtain transparency, it is preferably a monofilament.

  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 flat multi-filament flat filament with a single yarn fineness, the molten polymer is discharged from a base having discharge holes arranged in an annular shape, and the circumference is arranged in a radial direction from the center of the base or surrounding the base discharge holes. It is preferable to use a so-called annular cooling device for flowing cooling air from the direction 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 4.5 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 5.0 cN / T or more and particularly preferably 5.5 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 7.5 cN / T or less.

  As means for adjusting the strength to 4.5 cN / T or more and the elongation of 40 to 50%, preferred embodiments are shown below, but are 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 using the second godie 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. For example, in the case of pantyhose, the leg portion indicates a range from a garter portion to a toe.

  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. 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)}.

C. Measurement of flatness Cut out a thin section in the cross-sectional direction at an arbitrary position of the fiber used for the coated yarn, photograph 100 cross-sections of the fiber as a single yarn with a transmission microscope, and print it out at a magnification of 1000 times (Mitsubishi Electric Corporation) (SCT-P66), captured using a scanner (Epson GT-5500WINS) (black-and-white photo, 400 dpi), magnified 1500 times on the display, and circumscribed circle OL using image processing software (WINROOF) The ratio L / S of the diameter L of the inscribed circle IC and the diameter S of the inscribed circle IC was calculated, and flatness = L / S was obtained from the number average value of the values obtained from 100 pieces.

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) Softness: Touching the calf part while wearing it, and setting the level of a normal commercial product (core thread 42T, winding thread 13dtex10 filament covering thread) to △, excellent softness of the texture ◎ → ○ → △ → x. ○ is a level where the softness is superior to the level of a commercially available product, and ◎ is a level which is particularly superior to the level of a commercially available product. Moreover, x is a level in which the softness is generally inferior to that of a commercially available product.

  (B) Transparency: As a sample for evaluation, scouring was performed, and the material subjected to the subsequent finishing process without dyeing was used to evaluate with a white fabric. The level at which the color of the foot shape can be seen through after being worn on the foot shape used for burst strength is marked as ◎, and as the foot shape color disappears, it is marked as →→ △ → x. Transparency required for the product characteristics is not less than ○ level, Δ is an unachieved level as product characteristics, and x is a level inferior as product characteristics.

  (C) Rupture strength: After putting the stocking product in the foot shape, aligning the garter at a position of 60 cm from the heel to the thigh, and centering on a 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 containing no titanium oxide was melted at 280 ° C. As the shape of the discharge hole, a discharge hole having round holes at both ends of the slit (the slit width H of the discharge hole, the discharge hole length in the slit direction being N, and the diameter of the round hole being D, N / H = 4. 4, D / H = 1.3, slit longitudinal direction is arranged in a direction perpendicular to the cooling air), and blows out the cooling air inward from the columnar filter. Cooling start distance: 36.5 mm, cooling length: 300 mm), and then 0.30 ml / min of oil agent (containing fatty acid ester, nonionic emulsifier, antistatic agent as oil agent active ingredient) from the oiling guide After discharging, supplying oil to the multifilament, applying entanglement with an entanglement nozzle (compressed air pressure 0.2 MPa), taking it up by placing it on the first godet roller, and subsequently, the elongation becomes 45% In After stretching between the two godet rollers, heat treatment was carried out by hanging on a second godet roller heated at 155 ° C., and then wound up at 4000 m / min to obtain a polyamide multifilament of 11 decitex 16 filaments (strength 5. 3 cN / dtex, 45% elongation, oval cross-sectional shape, flatness 2.5). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

  Using “Mobilon” K-type 42 dtex-1 filament (manufactured by Nisshinbo Co., Ltd.) as the core yarn of the covering yarn, covering was performed at a draft magnification of 3.5 times and a covering twist number of 2400 T / m.

  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 used to obtain pantyhose products.

  The obtained pantyhose had a very soft texture when the calf was touched. In addition, transparency and durability cleared the product characteristics.

Example 2
The polycaproamide chip used in Example 1 was melted at 280 ° C. As the shape of the discharge hole, a discharge hole having round holes at both ends of the slit (the slit width H of the discharge hole, the discharge hole length in the slit direction being N, and the diameter of the round hole being D, N / H = 4. 4, D / H = 1.3, the slit longitudinal direction is arranged in a direction perpendicular to the cooling air, and the number of discharge holes is changed with respect to Example 1), and cooling is performed inward from the 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. Do, pull Subsequently, the film was stretched with a second godet roller so that the degree of elongation was 45%, heat-treated by being put on a second godet roller heated at 155 ° C., and then wound at 4000 m / min. A polyamide multifilament filament was obtained (strength 5.5 cN / dtex, elongation 45%, cross-sectional oval shape, flatness 2.5). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

Covering was performed under the same conditions and conditions as in Example 1 as the core yarn of the covering yarn.
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 very soft texture when the calf was touched. In addition, transparency and durability cleared the product characteristics.

Example 3
The polycaproamide chip used in Example 1 was melted at 280 ° C. As the shape of the discharge hole, a discharge hole having round holes at both ends of the slit (the slit width H of the discharge hole, the discharge hole length in the slit direction being N, and the diameter of the round hole being D, N / H = 4. 4, D / H = 1.3, the slit longitudinal direction is arranged in a direction perpendicular to the cooling air, and the number of discharge holes is changed with respect to Example 1), and cooling is performed inward from the 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. Do, pull Subsequently, the film was stretched between the second godet rollers so that the degree of elongation was 45%, heat-treated by laying on a second godet roller heated at 155 ° C., and then wound up at 4000 m / min. A polyamide multifilament filament was obtained (strength 5.3 cN / dtex, elongation 45%, cross-sectional oval shape, flatness 2.5). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

  Covering was performed under the same conditions and conditions as in Example 1 as the core yarn of the covering yarn.

  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 very soft texture when the calf was touched. In addition, transparency and durability cleared the product characteristics.

Example 4
A polyhexamethylene diamide chip with 98% sulfuric acid relative viscosity of 2.8 and no titanium oxide was melted at 290 ° C. The polymer discharge amount was changed from that in Example 1. As the shape of the discharge hole, a discharge hole having round holes at both ends of the slit (the slit width H of the discharge hole, the discharge hole length in the slit direction being N, and the diameter of the round hole being D, N / H = 4. 4, D / H = 1.3, the slit longitudinal direction is arranged in a direction perpendicular to the cooling air, and the number of discharge holes is changed with respect to Example 1), and cooling is performed inward from the 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 out the wind, and then 0.22 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. Do, pull Subsequently, the film was stretched with a second godet roller so that the elongation was 45%, and then heat-treated by being put on a second godet roller heated at 155 ° C., and then wound at 4000 m / min. A polyamide multifilament filament was obtained (strength 5.3 cN / dtex, elongation 45%, cross-sectional oval shape, flatness 3.0). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

  Using “Mobilon” K type 38 dtex-1 filament (manufactured by Nisshinbo Co., Ltd.) as the core yarn of the covering yarn, covering was performed at a draft magnification of 3.5 times and a covering twist number of 2800 T / m.

  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 very soft texture when the calf was touched. Moreover, transparency and durability cleared the product characteristics and was excellent in transparency.

Example 5
The polycaproamide chip used in Example 1 was melted at 280 ° C. As the discharge hole shape, a discharge hole having a rugby ball type slit shape (length of slit in the longitudinal direction of the discharge hole / length in the width direction = 3.5, the longitudinal direction of the slit is arranged in a direction perpendicular to the cooling air) Using an internal blown ring cooling device (cooling start distance from the base surface: 36.5 mm, cooling length: 300 mm), which is discharged and used to blow cooling air inward from the cylindrical filter, and then 0 from the oiling guide .After 30ml / min oil agent (includes fatty acid ester, nonionic emulsifier and antistatic agent as oil agent active ingredients) is discharged, oil is supplied to the multifilament, and entanglement is imparted by the entanglement nozzle (compressed air pressure 0.2MPa) Then, the sheet is taken up by one-sided on the first godet roller, and subsequently stretched with the second godet roller so that the elongation becomes 45%. After being heat-treated by hanging on the second godet roller, it was wound at 4000 m / min to obtain a polyamide multifilament of 11 decitex 16 filaments (strength 5.3 cN / dtex, elongation 45%, cross-section convex lens type, Flatness 1.8). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

  Using “Mobilon” K type 56 dtex-1 filament (manufactured by Nisshinbo Co., Ltd.) as the core yarn of the covering yarn, covering was performed at a draft magnification of 3.5 times and a covering twist number of 2400 T / m.

  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. In addition, transparency and durability cleared the product characteristics.

Example 6
The polycaproamide chip used in Example 1 was melted at 280 ° C. The polymer discharge amount was changed from that in Example 1. As the shape of the discharge hole, a discharge hole having round holes at both ends of the slit (the slit width H of the discharge hole, the discharge hole length in the slit direction being N, and the diameter of the round hole being D, N / H = 4. 4, D / H = 1.3, the slit longitudinal direction is arranged in a direction perpendicular to the cooling air, and the number of discharge holes is changed with respect to Example 1), and cooling is performed inward from the cylindrical filter. Cooled by using an internal blown annular cooling device (cooling start distance from the base surface: 36.5 mm, cooling length: 300 mm) that blows out the wind, and then 0.35 ml / min of the oil agent (fatty acid ester as an oil agent active ingredient) from the oiling 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. Do, pull Subsequently, the film was stretched with a second godet roller so that the elongation was 45%, heat-treated by being put on a second godet roller heated at 155 ° C., and then wound at 4000 m / min. A polyamide multifilament filament was obtained (strength 5.3 cN / dtex, elongation 45%, cross-sectional oval shape, flatness 2.5). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

  Using “Mobilon” K-type 78 dtex-1 filament (manufactured by Nisshinbo Co., Ltd.) as the core yarn of the covering yarn, covering was performed at a draft magnification of 3.5 times and a covering twist number of 2300 T / m.

  Stockings were knitted using the same sock knitting machine as in Example 5 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 very soft texture when the calf was touched. In addition, transparency and durability cleared the product characteristics.

Comparative Example 1
The polycaproamide chip used in Example 1 was melted at 280 ° C. The polymer discharge amount was changed from that in Example 1. Cooled by using a uniflow type cooling device that discharges from a round discharge hole arranged on the entire surface of the spinneret and blows cooling air in one direction from one side, and 0.35 ml / min of the same oil agent as in Example 1 from the oil supply guide. Is discharged, oil is supplied to the multifilament, entangled with the entanglement nozzle (compressed air pressure 0.2 MPa), and then taken up by one-sided on the first godet roller. Subsequently, the elongation becomes 45%. After stretching with the second godet roller as described above, heat treatment was carried out by placing it on a second godet roller heated at 155 ° C. and then wound up at 4000 m / min to obtain a polyamide multifilament of 13 dtex 10 filaments ( Strength 6.0 cN / dtex, elongation 45%). 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.
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.

  When the obtained pantyhose was touched with a calf, it lacked a soft texture compared to the product of Example 1 and was at the level of a conventional product.

Comparative Example 2
The polycaproamide chip used in Example 1 was melted at 280 ° C. As the shape of the discharge hole, a discharge hole having round holes at both ends of the slit (the slit width H of the discharge hole, the discharge hole length in the slit direction being N, and the diameter of the round hole being D, N / H = 4. 4, D / H = 2.1, the slit longitudinal direction is arranged perpendicular to the cooling air, and the number of discharge holes is changed with respect to Example 1), and cooling is performed inward from the 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. Do, pull Subsequently, the film was stretched with a second godet roller so that the elongation was 45%, and then heat-treated by being placed on a second godet roller heated at 155 ° C., and then wound at 4000 m / min. A filament polyamide multifilament was obtained (strength 5.6 cN / dtex, elongation 45%, cross-sectional oval shape, flatness 1.3). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

Covering was performed under the same conditions and conditions as in Example 1 as the core yarn of the covering yarn.
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.

  When the obtained pantyhose was touched with a calf, it lacked a soft texture compared to the product of Example 1 and was at the level of a conventional product.

Comparative Example 3
The polycaproamide chip used in Example 1 was melted at 280 ° C. As the shape of the discharge hole, a discharge hole having round holes at both ends of the slit (when the discharge hole slit width H, the discharge hole length in the slit direction is N, and the diameter of the round hole is D, N / H = 24. 0, D / H = 2.1, the slit longitudinal direction is arranged perpendicular to the cooling air, and the number of discharge holes is changed with respect to Example 1), and cooling is performed inward from the 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) , 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. Done Next, the film was stretched between the second godet rollers so that the elongation was 45%, heat-treated by laying on a second godet roller heated at 155 ° C., and then wound up at 4000 m / min. A 16-filament polyamide multifilament was obtained (strength 3.3 cN / dtex, elongation 45%, cross-sectional oval shape, flatness 6.0). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

Covering was performed under the same conditions and conditions as in Example 1 as the core yarn of the covering yarn.
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 extremely soft when the calf was touched, but the bursting strength was low and the practical level was not reached.

Comparative Example 4
The polyhexamethylene diamide chip used in Example 4 was melted at 290 ° C. The polymer discharge amount was changed from that in Example 1. As the shape of the discharge hole, a discharge hole having round holes at both ends of the slit (the slit width H of the discharge hole, the discharge hole length in the slit direction being N, and the diameter of the round hole being D, N / H = 4. 4, D / H = 1.3, the slit longitudinal direction is arranged in a direction perpendicular to the cooling air, and the number of discharge holes is changed with respect to Example 1), and cooling is performed inward from the 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. Do, pull Subsequently, the film was stretched with a second godet roller so as to have an elongation of 45%, heat-treated by being put on a second godet roller heated at 155 ° C., and then wound up at 4000 m / min. A polyamide multifilament filament was obtained (strength 5.3 cN / dtex, elongation 45%, cross-sectional oval shape, flatness 3.0). The evaluation results of the polyamide multifilament are shown in Tables 1 and 2.

Covering was performed under the same conditions and conditions as in Example 1 as the core yarn of the covering yarn.
Stockings were knitted using the same sock knitting machine as in Example 5 using the covering yarn, and dyed and finished in the same manner as in Example 1 to obtain a pantyhose product.

  Although the obtained pantyhose had a very soft texture when touched with a calf, the pantyhose was poor in transparency as a stocking and had no merchantability.

  As a product, the stockings of the examples had a very soft texture when the calf was touched. On the other hand, Comparative Examples 1 and 2 were soft at the level of conventional products. This is because the winding yarn of the covering yarn used in the stockings of the examples is 0.6 to 1.0 dtex in single yarn fineness, 1.5 to 5.0 in flatness, and is symmetrical with respect to the long axis. This is because there is soft bending.

  On the other hand, since Comparative Example 1 has a single yarn fineness and a round cross section, in Comparative Example 2, the flatness was as low as 1.3, so the softness of the touch was not sufficient.

  Further, in Comparative Example 3, the flatness was as high as 6, so that although it had a soft texture, the yarn strength was low and the stocking did not have practical strength.

  Moreover, in the comparative example 4, since the fineness was as thick as 16 dtex, the stockings lacked transparency and were poor in merchantability.

Cross-sectional view of the polyamide multifilament of Example 1 Example of discharge hole shape

Explanation of symbols

OC: circumscribed circle, IC: inscribed circle, L: diameter of circumscribed circle, S: diameter of inscribed circle, H: slit width, N: discharge hole length, D: diameter of round hole

Claims (2)

An elastic fiber with a fineness of 30 to 80 dtex is used as the core yarn of the covering yarn, a wound yarn of 8 to 15 dtex, a single yarn fineness of 0.6 to 1.0 dtex, a flatness of 1.5 to 5.0, and a fiber A covering yarn for pressure stockings , characterized in that the cross-sectional shape is a polyamide multifilament line-symmetric with respect to the major axis.   2. A pressure stocking comprising the covering yarn according to claim 1 as at least a part of a leg portion.

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