JPH02229202A - Stockings - Google Patents

Abstract

PURPOSE:To obtain high-strength stockings, utilizing stretchability of conjugate yarn, having homogeneous knitted fabric surfaces and excellent in transparency without causing flaws by alternately arranging one conjugate yarn and one specific bulky crimped textured yarn of thermoplastic synthetic fiber and using both in leg parts. CONSTITUTION:The objective stockings obtained by, e.g. alternately arranging (A) one crimped conjugate yarn of 5-50 denier total size and 1-10 number of constituent filaments prepared by joining polyurethane elastomer and polycapramide in parallel or in an eccentric sheath-core type and (B) one bulky crimped textured yarn of thermoplastic synthetic fiber which is subjected to additional twisting of 30-2500 turns/m in the untwisting direction and knitting both in at least leg parts.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to stockings with excellent elasticity and transparency.

(Prior art) Conventionally, stocking yarns have been bulky crimped yarns made of thermoplastic synthetic fibers with good elasticity, and high-twist torque yarns 1.
Polyurethane-based covering yarns have been used.

In addition, various self-crimping composite yarns, so-called conjugate yarns, have been developed as having particularly excellent stretchability. This is made by bonding two polymer components with different shrinkage performance, and in particular, a crimpable composite yarn composed of polyurethane elastic material and polycapramide is
Special Publication No. 49-10283, Special Publication No. 55-3672
Publication No. 5. Many proposals have been made, such as in Japanese Patent Publication No. 55-23926.

Furthermore, in recent years, high-speed knitting machines have become common in the stocking knitting process, and with this, composite yarns that are improved from the above-mentioned ones in terms of knitting uniformity and abrasion resistance during high-speed knitting are being used. There is a yarn for stockings (Japanese Patent Application No. 62-6919) filed by the present applicant.

(Problems to be Solved by the Invention) The above-mentioned composite yarn exhibits great elasticity due to its crimping, and is said to be superior to ordinary bulky crimped yarns and high-twist torque yarns in this respect. However, on the other hand, the appearance of crimp reduced the transparency of the knitted fabric, and the uniformity of the surface of the knitted fabric was not fully satisfactory.

Therefore, attempts have been made to use materials with a small fineness to increase the transparency, and to inter-knit them with ordinary nylon filaments to increase the strength. It was not possible to obtain a neat knitted stocking fabric.

The present invention was developed in view of the above circumstances, and while taking advantage of the good stretchability of composite yarns, the surface of the knitted fabric is uniform and has excellent transparency, and furthermore, it has high strength and is resistant to scratches. The purpose is to provide stockings that cause less outbreaks.

(Means for Solving the Problems) The stocking ring of the present invention that achieves the above object uses a composite yarn made of a polymer of two or more components, a polyamide component and a polyurethane component, and a bulky winding of a thermoplastic synthetic fiber. The bulky crimped yarn is arranged alternately to form at least the leg portion, and the bulky crimped yarn is arranged in an untwisting direction three times.
The gist is that additional twisting is applied at a rate of 0 to 2500 times/m.

In addition, the above-mentioned composite yarn is made by joining a polyurethane elastic body and a polypropyramid in a parallel or eccentric core-sheath type, and has a total fineness of 5 to 5 (ld) and a filament composition of 1 to 10.
It is preferable to use crimped threads that are within the range of this invention.

(Function) In such a configuration, the composite yarn exhibits excellent stretchability due to its characteristic self-crimping. By weaving a bulky crimped yarn between these composite yarns, the elasticity becomes even better as a synergistic effect.

In addition, by additionally twisting the bulky crimped yarn in the untwisting direction, the yarn is given coil-like crimp to further improve stretchability and recovery properties, as well as excellent cohesiveness. When inter-knitted with the above, regular stitches are formed and excellent transparency can be obtained. And this convergence is
It also has the effect of suppressing slight occurrences on the knitted surface, that is, preventing the knitted fabric from being pulled and causing scratches due to slight snagging by nails or the like.

(Example) Examples of stockings according to the present invention will be described below with reference to the drawings.

FIG. 1 shows a banty stocking as an embodiment of the invention. This bunty stocking (P) is composed of three parts, a bunty part (l), a leg part (2), and a foot part (3), as usual.
1) is a raw yarn appropriately selected from woolly nylon, polyurethane covering yarn, etc., and is knitted into a stretchable knitting structure.

The leg portion (2) and foot portion (3) are knitted using alternately one composite yarn (4) and one bulky crimped yarn (5), as shown in FIG.

The composite yarn (4) in the present invention is a so-called conjugate yarn in which two or more polymers, a polyamide component and a polyurethane component, are separately supplied and the two are bonded together during spinning. In this example, we used a crimped composite yarn in which polyurethane elastic material and polycapramide are joined to a parallel type or eccentric core-sheath base, which has particularly excellent stretchability and durability, and can be knitted stably under high-speed conditions. I am using it.

This crimped composite yarn has a number of crimps of 5 crimps/am or more,
It is characterized in that the crimp width is not more than 5 times the fiber diameter and the crimp elongation rate after release is not more than 50%. That is,
The number of crimps is 5 or more/cm, and the crimp width is 5 times or less than the fiber diameter, preferably the number of crimps is 8/cm or more, and the crimp width is 2 to 4 times the fiber diameter. , which means the appearance of gentle wavy crimp as shown in Figure 3. And, it is rolled up into a cup or jelly with such wavy crimp, and the crimp elongation rate after release is 50% or less,
Preferably, it is 40% or less, which means that it is a stable composite yarn with extremely little change in crimp shape even after unwinding from a cup or cheese. These crimping numbers,
Crimp towel. If the crimp elongation rate after release is out of the above range, the fluctuation of the solution tension during knitting will increase, which will not only cause weft rows in the knitted fabric, but also cause yarn breakage and skipped stitches. I don't like it either.

Also, the boiling water shrinkage rate is 7~! It is preferably within the range of 7%. That is, if it is less than 793, crimp will not be sufficiently developed even by heat treatment after knitting, while if it is greater than 1796, there will be a problem that the product will be insufficient in size due to excessive shrinkage, and both are unsuitable. be.

Here, to briefly explain the above four measurement values, the number of crimp, crimp vibration l1, and crimp elongation rate after unwinding are 25±1℃, 65℃ after unwinding the yarn from the cup or cheese. ±3%
The sample was allowed to shrink for 1 hour under RH temperature and humidity, and the following measurements were performed using this as a sample.

The number of crimps is calculated by applying a load of 0.2 g/d to the sample length of 5.
cm is taken out, and then the number of crimps between 5 cm of the sample taken out is measured and a is calculated per lcm.

The crimp width and fiber diameter are measured by sandwiching the sample between two glass preparations under a microscope, or by taking a photograph and calculating the actual measurement from the photograph. In the present invention, the crimp width is 0 in FIG. 3, and the fiber diameter is d.

In addition, the crimp tensile modulus after deflation means that a skein equivalent to 1000 d is taken directly from a cup or cheese, and after being deflated to develop crimp under no load, a load of 200 g is applied for 1 minute. Next, apply a 200g load to 250rn. Skein length i after changing to g load and leaving it for 2 hours. , then 2
This is a value calculated by measuring the skein length It after applying a load of 00 g for 1 minute and using the following formula.

The shrinkage rate of boiling water is determined by applying a load of 200 g to a skein of 1000 d directly taken from a cup or a glass, and measuring the length of the skein 1 minute after applying a load of 200 g.

Then, with a load of 250 mg applied, 1.
After soaking for 5 minutes and air-drying for 1 hour, the length of the skein was measured again under a load of 200g! , is measured and calculated using the formula below.

The polyurethane elastic body is preferably one whose main component is polyhexamethylene carbonate, and the weight ratio of the soft segment to polycapramide is 7/3 to 7/3.
The range is 3/7.

The above description has given an example of a composite yarn suitable for use in the stockings according to the present invention, but the structure of the present invention is not limited to this composite yarn, and due to the difference in shrinkage rate between different components, Any material can be used as long as it has crimpability.

The fineness of the single filament of this composite yarn is 3 to 3.
30d, the number of filaments constituting is 1 to 10, and the total fineness is 5 to 50d, but in the present invention, since transparency is particularly sought, the total fineness is 5 to 30d, and the number of filaments constituting is 1 to 6. It is preferable to keep it within. That is, if it is outside this range, it is unsuitable because it has either insufficient durability or extremely poor transparency and texture.

The other bulky crimped yarn (5) is twisted 30 to 2,500 times/m1 in the untwisting direction, preferably 200 to 1,500 times/m1.
In this example, a false-twisted kennel yarn is twisted 600 times/m in the untwisting direction. This processed yarn (5) is appropriately selected from woolly yarn, kennel yarn, etc., and has a fineness of 10 to 20 d.
, the number of filaments is 1 to 7, preferably 13 to 7.
15d, 2 to 3 pieces. That is, it is preferable to have a taste within the range that does not cause problems in strength, and the smaller the number of filaments, the better the transparency. Further twisting is applied to this processed yarn (5) by reversing the twisting of the false twisting, adding convergence to the filaments, and giving coil-like crimp to the whole, improving elasticity and recovery. If the crimp is less than 30 times/m, sufficient crimp force and convergence will not be obtained, and if it is more than 2,500 times/m, the torque will be too emphasized and the appearance of the knitted fabric will deteriorate. Not only does this deteriorate, but the knitting properties also deteriorate, and both are unsuitable. In order to obtain sufficient convergence and stable torque, the number of additional twists is preferably 200 to 1,500 times/'rr1, and more preferably 400 to 1,000 times/m.

In the stocking according to the present invention, the additional twist crimped yarn (5) obtained as described above and the composite yarn (4) described above are used.
) are alternately knitted one by one, taking into consideration the beauty of the knitted surface. That is, the alternate knitting structure is l;2,
Or, if you create a texture like 2:1, both yarns (4).
The characteristic (5) appears unbalanced on the knitted surface, which is unfavorable in terms of appearance.

In addition, in this example, Z
The yarns that are additionally twisted in the S direction and have a torque in the S direction and those that are additionally twisted in the S direction and have a torque in the S direction are alternately arranged between the composite yarns (4). number is 2
If it is about 00 times/m, even if only one direction is used, the self-crimping property of the composite yarn (4) will be the same as that of the processed yarn (5
). (5) provides a buffering effect, and the obliqueness of the knitted fabric as a whole does not become a problem. However, if the additional twisting direction is alternately arranged between yarns in the Z direction and yarns in the S direction between the composite yarns (4) and knitted, the stockings will have a better appearance with regular stitches. In this case, due to the synergistic effect of the elasticity and recovery properties due to the crimp force of the composite yarn (4), it exhibits a well-balanced contractile force in the course and wool directions and becomes taut.

Specific Example> As a composite yarn, a crimped composite yarn was produced by the method described below.

First, the soft segment components were 70 parts of polyhexamethylene carbonate with a number average molecular weight of 2000, 30 parts of polyhexamethylene adipate, and 4 parts of a diisocyanate compound.
．． A thermoplastic polyurethane elastomer with a Shore hardness of 95 consisting of 4'-diphenylmethane diisocyanate and 1.4-butanediol as a chain extender and polycapramide are separately melted, and then both components are joined in parallel at a weight ratio of 5/5. It was joined to a mold and the undrawn yarn of 30 d of single yarn was wound up.

Then, this undrawn yarn was placed on a hot plate with a length of 20 cm between two rollers (the first roller being a heating roller).
- Stretched under the following conditions using a stretching machine equipped with
A filament yarn of 20 d/2 f was obtained.

Stretching speed: 600 m/min Stretching ratio: 3.50 times Heating roller temperature: 25°C Hot plate temperature: 25°C Next, a 40 cm hot plate was installed between the two rollers. Using a relaxation heat treatment device, the delivery roller speed was set at 400 m/min and the hot plate temperature was fixed at 120°C.
The yarn was subjected to relaxation heat treatment at a drawing roller speed of 220 m/min and then wound into a cup to complete a composite yarn with a relaxation rate of 45% during heat treatment.

The number of crimps of this composite yarn was 25 crimps/cm, the crimp width/fiber diameter was 2.7, and the crimp elongation rate and boiling water shrinkage rate after release were 10% and 10.5%, respectively. .

In addition, as bulky crimped yarn, 13d/5f woolly nylon yarn with false twist in S or Z direction and 13d/'
Five types of stockings were manufactured using a 4-neck seamless stocking knitting machine (rotation speed: 60 rpm) using 3F kennel yarn to form the leg and foot portions of the knitted fabric mixed with the composite yarn, and worn by 30 people. Tested.

Comprehensive evaluation The results shown in Table 1 show that between the crimped composite yarns. Feeding bulky crimped yarns with an appropriate number of additional twists to create an alternating interlaced structure provides elasticity, transparency, and a beautiful appearance with no scratches. It becomes clear that the requirement to obtain fewer stockings.

In addition, when comparing those using kennel thread (13d/3f) and those using woolly nylon thread (lad/5f) under the same conditions, the one using kennel thread has more transparency. It was confirmed that the smaller the number of filaments, the better the transparency even in the structure of the present invention.

Note that the term stockings as used in the present invention includes all over-the-shoulder stockings that reach above the knees, full-length stockings that extend to the base of the thighs, and pantyhose that have a bunty part and a stocking part integrated.

(Effects of the Invention) As described above, the stockings according to the present invention have the excellent elasticity and recovery properties of the composite yarn made of two or more polymers with different shrinkage rates, and the ability to be twisted into a coil shape. Due to the synergistic effect with the crimp force of the bulky crimped yarn, it exhibits a stable stretching effect in the course and wale directions.

In addition, additional twisting of the bulky crimped yarn gives excellent cohesiveness to the entire yarn, and by arranging one yarn alternately between the composite yarns, the transparency is significantly improved and scratches are reduced. The occurrence of this problem is also suppressed, and extremely high quality stockings can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a front view showing one embodiment of the stocking of the present invention, FIG. 2 is an explanatory diagram of the knitting structure thereof, and FIG. 3 is an explanatory diagram of the double yarn used in the same embodiment. (1)...Panty part, (2)...Leg part,
(3)...Foot part, (4)...Composite yarn, (
5) Bulky crimped yarn, (P) Bunty stockings. Fig.

Claims (2)

[Claims] (1) At least one composite yarn (4) composed of a polymer of two or more components, a polyamide component and a polyurethane component, and one bulky crimped yarn (5) of thermoplastic synthetic fiber are arranged alternately. The leg portion (2) is knitted, and the bulky crimped yarn (5) has a twisting density of 30 to 2500 in the untwisting direction.
Stockings characterized by being subjected to an additional twist of twists/m. (2) The composite yarn (4) is a crimped composite yarn formed by joining polyurethane elastic material and polycapramide in parallel or eccentric core-sheath type, with a total fineness of 5 to 50 d and a filament composition of 1 to 10. A stocking according to claim 1, which is within the scope of a book.