JPS60457B2 - synthetic fiber composite yarn - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a 100% synthetic fiber composite yarn that provides a woven or knitted fabric with improved moisture absorption, sweat absorption, and texture.

Synthetic fibers are used as clothing materials due to their excellent properties.
Although they are widely used, most of them are made of hydrophobic polymers, so they have poor moisture absorption properties, causing unpleasant stuffiness and stickiness when used as clothing, especially underwear and summer clothing. It is considered unsuitable for uses such as clothing.

In order to solve these drawbacks, a lot of research has been carried out to develop hydrophilic synthetic fibers or to make hydrophobic synthetic fibers hydrophilic.For example, a method of introducing hydrophilic groups into a polymer primary mirror Hydrophilic synthetic fibers or nylon 4 fibers are manufactured by methods such as kneading a hydrophilic compound into a polymer, applying a hydrophilic compound to the fiber surface, and the like. However, although such hydrophilic synthetic fibers have hygroscopic properties, they may reduce the excellent performance originally possessed by the main polymer IJ polymer fibers, or may have poor performance.
It has various drawbacks such as poor durability and poor feel and texture when used in clothing as a woven or knitted fabric. In this way, the hydrophilic synthetic fibers that are industrially produced today, whether they are made into spun yarn or crimped multifilament, have serious problems in terms of comfort when used in clothing, especially for summer clothes. When used for underwear and innerwear, there is a marked difference in texture compared to natural porridge fibers.

In order to overcome the various drawbacks of using synthetic fibers as described above, the present inventors have carefully investigated the problem of moisture absorption in clothing, that is, the process of transport of sweat emitted from the human body through clothing, and the related problem of texture. As a result of extensive consideration and research, the present invention has been arrived at.

Sweat that passes through the sweat glands to regulate body temperature is partially discharged as gas and partially as liquid, depending on the external atmospheric conditions. A part of this discharged sweat is directly dissipated to the outside world through the gaps between the threads or fibers that make up the clothing, and a part is once retained between the fibers and within the fibers depending on their moisture absorption ability. Sweat is transferred to the outside world and dissipated by a migration process based on the content density gradient, and no more sweat is able to move through the clothing, remaining between the skin surface and the clothing surface, and this residual sweat becomes hot and humid when wearing clothes. It is related to the texture and gives a sticky feeling in conjunction with the surface structure of each cloth that makes up the clothing. On the other hand, in terms of the amount of perspiration, humans sweat at a rate of 15 degrees per day even when they are at rest, and when they exercise or in a hot and humid environment, the amount of sweat increases to about six times that amount, and the amount of sweat perspires on the skin and clothing. Humidity between 70-100%RH
It also makes you feel hot, humid, and sticky.

Therefore, it is important for clothing to have the ability to quickly absorb sweat emitted from the human body and dissipate it to the outside world. Hygroscopicity is a problem, and the commonly used relative humidity of 65% is considered to be out of touch with the actual situation.

And, as clothes that do not give you a feeling of heat, humidity, or stickiness,
It is made of fibers with high moisture absorption ability in high humidity environments, has voids between fibers and yarns that can sufficiently hold water, has an internal structure that facilitates movement based on density gradients, and a rough surface structure that has a large evaporation area. Ideally, it should be made of a fabric with a structure in which the outermost surface has fibers that dry easily, that is, have low hygroscopicity. The present invention provides yarns for woven and knitted fabrics made of synthetic fibers that can be used to make such curtains. Class resistance,
This is because functions such as durability are also considered important. The yarn of the present invention is made by aligning or twisting a spun yarn made of synthetic fiber and a crimped synthetic fiber filament yarn, and the spun yarn is 20 to 7% by weight and the filament wrapped yarn is 80 to 3% by weight. The fibers constituting the spun yarn have an equilibrium moisture content of 3% or less at 20 pm and 80% RH, and the fibers constituting the filament crimped yarn have a composition ratio of 20 q0 or less.
It is a synthetic fiber composite yarn characterized by having an equilibrium moisture content of 10% or more at 80% RH.

The spun yarn in the composite yarn of the present invention has a strong water absorption ability based on capillary phenomenon, a less directional water conduction ability due to the disordered fiber orientation compared to filaments, and a rough surface structure and large evaporation area due to the presence of fluff. It also plays a role in stably maintaining the voids in the filament crimped yarn, which tend to disappear when stretched, by aligning or twisting them together with the filament crimped yarn.

And this spun yarn has a little bit of hygroscopicity, namely 20oo, 8
By using a synthetic fiber staple with a 0% RH equilibrium moisture content of 3% or less, the outermost surface is composed of fiber fuzz that dries easily and has low hygroscopicity. In addition, the synthetic fiber filament crimped yarn has large inter-fiber voids due to its bulk and water absorption due to the fact that the constituent fibers are hygroscopic fibers with an equilibrium moisture content of 10% or more at 20°C and 80%RH, and have a large water-holding capacity. give. Here, the equilibrium moisture content of the fiber is 10%
If it is lower, a problem arises in that fast water absorption ability cannot be obtained. The composite proportion of the spun yarn and the filament-wound warp is 20 to 7% by weight, preferably 30 to 5% by weight.
If it is less than 2% by weight, the spun yarn fluff may be suppressed by the filament, and the filament surface becomes dominant, and the hammered surface touch and dry touch due to the spun yarn fluff will be lost. Become. In addition, when the spun yarn exceeds 7% by weight, the water-holding voids decrease,
This results in a loss of the quick wicking ability of the hygroscopic fibers. Examples of the fibers used in the spun yarn in the present invention include polyester fibers, polyacrylonitrile fibers, and polyvinyl alcohol fibers. In addition, the fiber used for the filament crimped yarn is 20o
o, Nylon 4 with an equilibrium moisture content of 10% or more at 80%RH
fibers, acrylic acid, methacrylic acid, maleic acid, styrene sulfonic acid, acrylamide, and other hydrophilic monomers having a hydrophilic group and a polymerizable double bond, using known ionizing irradiation methods, peroxide methods, Examples include polyamide fibers graft-polymerized by methods using ozone or ultraviolet rays, polyvinyl alcohol fibers, and fibers obtained by converting polyester fibers into alkali metal salts using a weak alkali such as soda carbonate. Methods for imparting crimps to this hygroscopic filament yarn include known longitudinal winding methods such as false twisting and pressing, or methods using conjugate fibers. A method of combining spun yarn and filament crimped yarn. As mentioned above, the spun yarn may be aligned or twisted together, but in order to expose more of the spun yarn on the surface, overfeeding the filament crimped yarn will cause the spun yarn to be twisted around the filament crimped yarn in a wall-twisted manner. The winding method is said to be particularly preferable.When the composite yarn of the present invention is used in woven or knitted fabrics, it can be used for underwear, sports clothing, shirts,
A cloth tail suitable for blouses etc. can be obtained.

Hereinafter, "Examples of the present invention will be shown."

Example 1 Polyester short fibers (1.9
A false twisted yarn (IONe/24fil) consisting of 4 filaments of nylon with an equilibrium moisture content of 1% by weight under the same atmospheric conditions as a 40'/spun yarn consisting of 38 legs) was exchanged and knitted using a circular knitting machine. did.

Sports shirts were sewn in this green area and tested on 20 men.The results shown in Table 1 were obtained.

Here, we focused on three items: sweat absorption, heat, and sticky feeling when worn, and compared the average values obtained from testers who answered each item on a 5-point scale. Table 1 Example 2 Equilibrium moisture under the same conditions as a 40/1 spun yarn made of triangular cross-section polyester short fibers with an equilibrium moisture content of 0.8% by weight under the conditions of an ambient temperature of 2000℃ and a relative humidity of 80% RH. Using a composite yarn in which false twisted yarn (15 e/4 is d) consisting of long fibers of nylon 6 grafted with 15% by weight of acrylic acid and then sodium salted with sodium carbonate,
A plain woven fabric was obtained.

Blouses were sewn from the fabric and tested on 20 women. The results were summarized using the same method as in Example 1 and are shown in Table 2. Table 2 Example 3 80 No S spun yarn made of polyester short fibers (1. Matrix e x 38 willow) with an equilibrium moisture content of 0.8% by weight under the conditions of an ambient temperature of 2000 and a relative humidity of 80% RH. Equilibrium moisture content under atmospheric conditions is 5. Two false twisted yarns (15 e/4 ail) made of long fibers of nylon 6 with a weight ratio of 20% by weight were aligned and twisted together with an overfeed of 50% to obtain a composite yarn.

A knitted fabric is made using this composite yarn, which is soaked in methacrylic acid and ammonium persulfate, wrapped in polyethylene film, left at 9000 for 1 hour, extracted with water, and then treated with an aqueous solution of soda carbonate. When this knitted fabric was disassembled and nylon 6 and polyester were analyzed separately, it was found that nylon 6 was not grafted to polyester, but had an equilibrium moisture content l in which nylon 6 was grafted with methacrylic acid.
It was confirmed that the fibers were 1% by weight. This knitted fabric was sewn into sports shirts and worn by 20 women, and the test results are shown in Table 3. Table 3

Claims (1)

[Claims] 1 Consisting of a spun yarn made of synthetic fiber and a filament crimped yarn of synthetic fiber, which are aligned or twisted together, with the spun yarn being 20 to 70% by weight and the filament crimped yarn being 80 to 30% by weight.
The fibers constituting the spun yarn have an equilibrium moisture content of 3% or less at 20°C and 80% RH, and the fibers constituting the filament yarn have a composition ratio within the range of 20°C by weight.
, a synthetic fiber composite yarn having an equilibrium moisture content of 10% by weight or more at 80% RH.