JPH0241401A - Pantystocking - Google Patents

Abstract

PURPOSE:To obtain stockings having excellent stretchability and transparent feeling by alternately arranging conjugated yarn comprising plural polymers having different shrinkage percentages and bulky crimped textured yarn of thermoplastic synthetic yarn additionally twisted to knit a leg part. CONSTITUTION:Conjugated yarn (e.g., crimped conjugated yarn of polyurethane elastic material and polycaproamide) 4 consisting of a polymer of two or more components having different shrinkage percentages and bulky crimped textured yarn (e.g., falsely twisted woolly nylon yarn) 5 additionally twisted at 30-2,500 times/m in the twisting direction are arranged one by one alternately to knit a leg part 2 and a foot part 3 and then a panty part 1 is knitted from raw yarn such as woolly nylon into a stretchable knitted texture to give the aimed pantystockings P.

Description

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

(Prior Art) Hitherto, bulky crimped yarns of thermoplastic synthetic fibers with good elasticity, high-twist torque yarns, polyurethane-based covered yarns, and the like have been used as raw yarns for stockings.

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
Tokuko Sho 48-to2as newsletter, Tokko Sho 65-3672
Many proposals have been made in the Bulletin No. 5, Japanese Patent Publication No. 55-13826, etc.

Furthermore, in recent years, high-speed knitting machines have become common in the stocking knitting process, and with this, composite yarns have been developed that have improved the above-mentioned yarns in terms of uniformity and abrasion resistance during high-speed knitting. There is a yarn for stockings filed by the present applicant (Japanese Patent Application No. 8818/1988).

(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 knitted fabric surface 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 takes advantage of the good elasticity of composite yarns, has a uniform surface with excellent transparency, has high strength, and is resistant to scratches. The purpose is to provide stockings with less stockings.

(Means for Solving the Problems) The stockings of the present invention that achieve the above objects include a composite yarn made of two or more polymers having different shrinkage rates;
At least the leg portion is knitted by alternately arranging one bulky crimped yarn of thermoplastic synthetic fiber, and the bulky crimped yarn is additionally twisted at a rate of 30 to 2500 times/m in the untwisting direction. The main point is that

In addition, the above-mentioned composite yarn is made by joining polyurethane elastic body and polycapramide in parallel or eccentric core-sheath type, has a total fineness of 6 to 50 d, and has a filament composition of 1 to 10.
It is preferred to use crimped composite yarns 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, and the above-mentioned composite When cross-knitted with yarn, regular stitches are formed and excellent transparency can be obtained. This convergence also has the effect of suppressing the occurrence of scratches on the knitted surface, that is, the effect of preventing the knitted fabric from being pulled and causing scratches due to slight catching by nails or the like.

(Example) Hereinafter, examples of stockings according to the present invention will be described based on illustrations.

FIG. 1 shows an example in which the present invention is applied to pantyhose. This pantyhose (2) is like a normal pantyhose (panty part (1), leg part (2).

The panty part (1) is knitted into a stretchable knitted structure using yarn appropriately selected from woolly nylon, polyurethane covering yarn, and the like.

As shown in FIG. 2, the leg portion (2) and foot portion (3) are knitted using alternately one composite yarn (4) and one bulky crimped yarn (6).

The composite yarn (4) in the present invention is a so-called conjugate yarn in which two or more polymer components having different shrinkage rates are supplied separately and the two or more components are bonded together during spinning.

In this example, we used a crimped composite yarn in which polyurethane elastic material and polycapramide are joined in a parallel type or eccentric core-sheath type, which has particularly excellent elasticity and durability and can be knitted stably under high-speed conditions. ing.

This crimped composite yarn has a number of crimps of 5 crimps/cm 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/cm or more and the crimp width is 5 times or less the fiber diameter, preferably the number of crimps is 8/Crn or more and the crimp width is 2 to 4 times the fiber diameter. , which means that a gentle wavy crimp as shown in FIG. 3 appears.

Then, it is confirmed that the cottop or cheese is rolled up with such wavy crimps, and that the crimping elongation rate after release is 50% or less, preferably 40% or less. This means that it is a stable composite yarn with extremely little change in crimp pattern even after sowing. If the number of crimp, crimp width, and crimp elongation rate of the release diameter are out of the above range, the unwinding tension fluctuation during knitting will increase, and not only will a line film occur in the knitted fabric, This is undesirable because thread breakage and skipped stitches may occur.

Moreover, it is preferable that the water production shrinkage rate is within the range of 7 to 17%. That is, if it is less than 7%, crimp will not be sufficiently developed even by heat treatment after knitting, and if it is more than -17%, there will be a problem that the product will be insufficient in size due to excessive shrinkage. is also inappropriate.

Here, to briefly explain the above four measurement values, the number of crimp, crimp width, and crimp elongation rate after untying are as follows: After untying the yarn from a cot or cheese, 25°C, 66° C. Person S%R
The sample was allowed to shrink for 1 hour under the temperature and humidity of H, and the following measurements were performed using this as a sample.

The number of crimps is determined by applying a load of 0.21/d to the sample length of 5
Cm is taken out, and then the number of crimp in 6 cm of the taken sample is measured and converted to per 1 cm.

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

In addition, the crimp elongation rate after letting go is to take a skein equivalent to 1000 d directly from a cot or cheese, let it let go and develop crimp under no load, then apply a load of 20 of for 1 minute, and then Change 200f load to 250m1 load 2
Measure the length of the skein after leaving it for a period of time, then measure the length of the skein for 200 minutes.
This is a value calculated by the following formula after measuring the skein length 11 after applying a load of f for 1 minute.

g.

The water production shrinkage rate is calculated by applying a load of 2001 to a 1000 d skein taken directly from a coke or cheese, and after 1 minute the skein length is 1! Measure.

Next, it was immersed in water for 16 minutes under a load of 250 mF and air-dried for 1 hour, and then the length ig of the skein was measured again under a load of 20 mF 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 5/7.

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 8. 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 (6) is twisted 30 to 2500 times/rfl, preferably 200 to 2500 times/rfl in the untwisting direction.
In this example, the false twisted kennel yarn was twisted 500 times/m in the untwisting direction.
A material with an additional twist of m is used. This processed yarn (5) is appropriately selected from woolly yarn, kennel yarn, etc., and has a fineness of 10
~20d1 The number of filaments constituting the filament is 1 to T, preferably 16 to 15d12 to 6. That is, it is preferable that the filament be as thin as possible within a 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 heating curl of false twisting, adding convergence to the filaments, and giving a coil-like crimp to the whole, improving elasticity and recovery. If the crimp rate is less than 30 times/m, sufficient crimp force and convergence cannot be obtained;
If the number is more than 0 times/m, the torque will be too emphasized and the appearance of the knitted fabric will deteriorate (and the knitting performance will also decrease, both of which are unsuitable.) In order to obtain sufficient convergence and stable torque, The number of additional twists is preferably 200 to 1,800 times/m, and more preferably 400 to 1,000 times/m.

In the stockings according to the present invention, the additional twist crimped yarn (8) 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 west side of the knitted fabric. In other words, the diplomatic organization is 1:2,
Or, if you create a structure 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, as the additional twist crimped yarn (6), 2
Threads that are additionally twisted in two directions and have torque in two directions, and yarns that are additionally twisted in eight directions and have torque in eight directions 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 (6
) and (6) will provide a buffering effect, and obliqueness will not be a problem for the linear motion as a whole. However, it is better to alternately knit yarns with two twisting directions and yarns with eight twisting directions between the composite yarns (4).
The stockings have a well-knitted appearance and a good appearance, and in this case, the crimping force of the composite yarn (4) (1) provides a well-balanced contractile force in the course and wale directions due to the multiplication effect of the elasticity and recovery properties of the composite yarn (4). Be able to do it.

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

First, the soft segment component has a number average molecular weight! 000 polyhexamethylene carbonate, 830 parts of polyhexamethylene azivar, and 4 diisocyanate compounds.
．． A thermoplastic polyurethane elastomer of 4'-diphenylmethane diisocyanate and 1.4-butanediol as a chain extender with a Shear hardness of 95 is melted separately, and then polycapramide is melted in parallel at a bonding weight ratio of 515. The undrawn yarn of the single yarn Bod was joined to a mold and wound up.

Then, this undrawn yarn was drawn under the following conditions using a drawing machine equipped with a hot plate having a length of '1 Q cm between two rollers (the 10th roller is a heating roller). A filament yarn of 20 d/if was obtained.

Stretching speed: 500 m/min Stretching ratio: 3.50 times Heating roller temperature: 28°C Hot plate temperature: 25°C Next, a 40 am hot plate was installed between the two rollers. Using a relaxation heat treatment device, the feed roller speed is set at 400 m/min, the hot plate temperature is fixed at 120°C, and the pull-out roller speed is set at 220 m/7 min. After the relaxation heat treatment is performed, the product is rolled up into a cot, and the relaxation rate during heat treatment is set to 45%. Completed composite yarn.

The number of crimps of this composite yarn is 26/cm, and the crimp width/fiber diameter is! , 7. The crimp elongation rate and water production shrinkage rate after release and contraction were 10% and 10.6%, respectively.

In addition, as bulky crimped yarn, I S d/8 f woolly nylon yarn with 8 or 2 directions of false twist and I
Using kennel yarn of S d / 3 f, 5 types of stockings were manufactured in which the leg portion and foot portion were formed with a knitted fabric mixed with the composite yarn using a 40 seamless stocking knitting machine (rotation speed 110 Orpm), and 30 We conducted a wear test based on the name. Comprehensive evaluation The results shown in Table 1 show that a bulky crimped yarn with an appropriate number of additional twists is fed between the crimped composite yarns to create a rakudai structure in which one yarn is alternated with the other. It is clear that these are the constituent requirements for obtaining stockings that have excellent elasticity and transparency, are beautiful in appearance, and are less prone to crinkling.

In addition, when comparing those using kennel thread (1gd/sf) and those using woolly nylon thread (13d/sf) under the same conditions, the one using kennel thread has a more transparent feel. *EIl indicates that the structure of the present invention is superior in terms of transparency when the number of filaments is smaller.

The stockings used in the present invention include over-the-knee stockings that reach above the knees, full-length stockings that extend to the base of the thighs, and pantyhose that combine a panty portion and a stocking portion.

(Effects of the Invention) As described above, the stockings according to the present invention are characterized by the soaked elasticity and recovery properties of the composite yarn made of two or more polymers with different shrinkage rates, and the coiled crimping after additional twisting. Due to the synergistic effect with the winding force of the bulky crimped yarn, it exhibits a stable stretching effect in the course and wale directions.

In addition, by additionally twisting the bulky crimped yarn, excellent cohesiveness is imparted to the entire system, and when one of these yarns is alternately arranged 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 its knitting structure, and FIG. 5 is an explanatory diagram of the composite yarn used in the same embodiment. (1)...Panty part, (2)...Leg part, (3
)...Foot part, (4)...Composite yarn, (S
)...Bulky crimped yarn, (3)...Pantyhose. Figure 1 Figure 1

Claims (2)

[Claims] (1) One composite yarn (4) composed of two or more polymer components having different shrinkage rates and one bulky crimped yarn (S) of thermoplastic synthetic fiber are alternately arranged to form at least the leg portion ( 2), and the bulky crimped yarn (5)
The stockings are additionally twisted at a rate of 30 to 2,500 times/m in the untwisting direction. (2) The composite yarn (4) is a crimped composite yarn formed by joining a polyurethane elastic body and a polycapramide in a 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.