JP2000303288A - Production of coated elastic yarn, coated elastic yarn, its yarn product and production of yarn product - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a coated elastic yarn capable of providing a product having high fitness and wearing feeling without impairing appearance quality, attaching and detaching properties, transparency, crispy feeling, etc., by heat-treating an elastic yarn at the softening point of the soft segment of the elastic yarn or lower than it. SOLUTION: In producing a coated elastic yarn by coating the circumference of an elastic yarn such as a polyurethane elastic yarn, etc., with an inelastic yarn such as a rayon, a polyester, the elastic yarn is heat-treated at the softening point of the soft segment of the elastic yarn or lower than it, for example, a temperature range of (the softening point-30 deg.C) to (the softening point-10 deg.C) for >=5 days and <=11 day to give the coated elastic yarn. Preferably the elastic yarn is heat-treated before or after coated witch the inelastic yarn.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a method for producing a coated elastic yarn, a coated elastic yarn, a fiber product thereof, and a method for producing a fiber product.

More specifically, when the coated elastic yarn obtained by the production method of the present invention is used in clothing and the like after a high-order processing, or after being used in clothing and the like, the heat treatment in the present invention is performed. , Appearance quality, detachability,
A method of producing a coated elastic yarn and a coated elastic yarn that have a transparency, a sharpness, and the like that are equal to or higher than the case of using a normal coated elastic yarn, and that can provide a high fit and a feeling of wearing. And a textile product thereof and a method for producing the textile product.

[0003]

2. Description of the Related Art Conventionally, elastic yarns such as polyurethane elastic yarns have been used for stockings and the like, and such elastic yarns have been used as processed yarns covered with inelastic yarns.

Further, various polyurethane elastic yarns and coated elastic yarns have been used so far, but in these conventional yarns, the fitting property and the feeling of wearing can be improved without changing the appearance quality and detachability. In order to increase the size, it was necessary to increase the fineness of the elastic yarn, but there was an inconvenience that the texture such as the transparency of the stocking and the feeling of sharpness was reduced.

It has been desired to develop a completely new polymer in order to improve such disadvantages, but it has been difficult to achieve a suitable polymer.

[0006]

SUMMARY OF THE INVENTION In the present invention, it has been intensively studied whether the fitting property and the wearing feeling can be easily increased without causing the disadvantages as in the above-mentioned prior art. The present invention has found a method for increasing the fit and wearing feeling of a textile product using a conventional coated elastic yarn without increasing or developing a completely new polymer.

[0007] An object of the present invention is to provide a method for producing a coated elastic yarn capable of obtaining a product having a high fitting property and a feeling of wearing without deteriorating the conventional quality in appearance quality, detachability, transparency, sharpness, and the like. An object of the present invention is to provide a coated elastic yarn, a fiber product thereof, and a method for producing a fiber product.

Further, the coated elastic yarn obtained by the present invention can be developed for various uses.

[0009]

Means for Solving the Problems A method for producing a coated elastic yarn according to the present invention has the following matters to specify the invention in order to solve the above-mentioned problems.

That is, a method for producing a coated elastic yarn in which the elastic yarn is covered with a non-elastic yarn, wherein the elastic yarn is heat-treated at a temperature equal to or lower than the softening point of the soft segment of the elastic yarn. This is a method for producing a coated elastic yarn.

[0011] The coated elastic yarn of the present invention has the following items for specifying the invention in order to solve the above-mentioned problems.

That is, a method for producing a coated elastic yarn in which the elastic yarn is covered with a non-elastic yarn, wherein the elastic yarn is heat-treated at a temperature equal to or lower than the softening point of the soft segment of the elastic yarn. A coated elastic yarn produced by a method for producing a coated elastic yarn.

[0013] The fiber product of the present invention has the following invention specific items in order to solve the above-mentioned problems.

That is, a method for producing a coated elastic yarn in which the elastic yarn is covered with a non-elastic yarn, wherein the elastic yarn is heat-treated at a temperature equal to or lower than the softening point of the soft segment of the elastic yarn. A fiber product comprising a coated elastic yarn produced by a method for producing a coated elastic yarn.

Further, the method for producing a textile product of the present invention has the following matters specifying the invention in order to solve the above-mentioned problems.

That is, a fiber product containing a coated elastic yarn obtained by coating an elastic yarn with a non-elastic yarn is heat-treated at a temperature equal to or lower than the softening point of the soft segment of the elastic yarn. It is.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in more detail.

The present invention relates to a method for producing a coated elastic yarn in which the elastic yarn is covered with a non-elastic yarn, wherein the elastic yarn is heat-treated at a temperature not higher than the softening point of the soft segment of the elastic yarn. The temperature range is not particularly limited as long as it is equal to or lower than the softening point of the soft segment of the elastic yarn.
The range of -250 ° C or more and the softening point or less is preferable, and -210
C. or more (softening point −5 ° C.) or less, more preferably,
A range from (softening point −30 ° C.) to (softening point −10 ° C.) is more preferable.

In the present invention, the heat treatment is preferably performed by storage in a freezer, a refrigerator, or the like, and is also preferably performed by using a refrigerant such as liquid nitrogen or argon.

The heat treatment time is not particularly limited, but is preferably in the range of 0.01 seconds to 91 days.
The range is preferably 1 second to 21 days, and more preferably 5 days to 1 day.
A range of 1 day or less is more preferred.

As described above, by performing the heat treatment at a temperature lower than the softening point of the soft segment of the elastic yarn, the soft segment portion of the elastic yarn can be crystallized. This crystallized portion remains as a pseudo-crystal even when left at room temperature, and the power of the elastic yarn itself increases, so that the coated elastic yarn and the fiber product have an improved fit and a feeling of wearing. Things.

The heat treatment in the present invention can be carried out at any time regardless of the form of the coated elastic yarn.

That is, when the heat treatment is performed only on the elastic yarn before being coated with the inelastic yarn, or when the heat treatment is performed on the coated elastic yarn after being coated with the inelastic yarn, the present invention The heat treatment may be performed in the state of a fiber product manufactured using the coated elastic yarn that has not been subjected to the heat treatment.

The heat treatment may be applied to the elastic yarn, the coated elastic yarn, and the fiber product which have been processed other than the heat treatment of the present invention.

The elastic yarn used in the present invention will be described.

The elastic yarn used in the present invention is preferably a polyurethane elastic yarn.

The polyurethane elastic yarn is spun from a polyurethane polymer.

The spinning method may be any of dry spinning, wet spinning and melt spinning, and spinning conditions such as spinning speed may be appropriately selected.

The polyurethane polymer used in the present invention may be any one, and is not particularly limited.

Further, the synthesis method is not particularly limited.

That is, for example, a polyurethane urea composed of a polyol, a diisocyanate and a diamine, or a polyurethane composed of a polyol, a diisocyanate and a diol may be used.

Further, polyurethane urea using ethanolamine as a chain extender may be used.

It should be noted that a polyfunctional glycol or isocyanate having three or more functionalities may be used as long as the effects of the present invention are not impaired.

Here, typical structural units constituting the polyurethane yarn of the present invention will be described.

The representative polyurethanes used in the present invention include polyether glycols, polyester glycols, and polycarbonate diols.

[0036] In particular, when flexibility and elongation of the yarn are required, it is preferable to use a polyether-based glycol. Examples of the polyether glycol include polyethylene glycol, polypropylene glycol, polytetramethylene ether glycol (hereinafter abbreviated as PTMG), modified PTMG (hereinafter abbreviated as 3M-PTMG) which is a copolymer of THF and 3-MeTHF, Representative examples include modified PTMG which is a copolymer of THF and 2,3-dimethyl THF, and polyols having both side chains such as polyalkylene ether glycol having side chains disclosed in Patent Publication No. 2615131 and the like. Can be used. These polyether-based glycols may be used alone or as a mixture or copolymer of two or more.

Further, when abrasion resistance and light resistance are particularly required as the polyurethane yarn, butylene adipate, polycaprolactone diol, polyester having a side chain disclosed in JP-A-61-26612 and the like can be used. Polyester glycols such as polyols and polycarbonate diols disclosed in Japanese Patent Publication No. 2-289516 may be used.

These polyols may be used alone or as a mixture or copolymer of two or more.

The number average molecular weight of the polyol used in the present invention is 1 from the viewpoint of elongation, strength, heat resistance and the like when formed into a yarn.
It is preferably in the range of 000 or more and 8000 or less.

More preferably, the range is 2500 or more and 6000 or less. By using a polyol having a molecular weight in this range, an elastic yarn having excellent elongation, strength, elastic recovery force and heat resistance can be obtained.

Next, the diisocyanate used in the present invention is diphenylmethane diisocyanate (hereinafter abbreviated as MDI), tolylene diisocyanate, 1,4-diisocyanatobenzene, xylylene diisocyanate, 2,6-diisocyanate.
Aromatic diisocyanates such as naphthalene diisocyanate are particularly suitable for synthesizing polyurethane having high heat resistance and strength.

Further, as alicyclic diisocyanates, for example, methylene bis (cyclohexyl isocyanate) (hereinafter abbreviated as H ₁₂ MDI), isophorone diisocyanate, methylcyclohexane 2,4-diisocyanate,
Methylcyclohexane 2,6-diisocyanate, cyclohexane 1,4-diisocyanate, hexahydroxylylene diisocyanate, hexahydrotolylene diisocyanate, octahydro 1,5-naphthalene diisocyanate and the like can be used. Aliphatic diisocyanates can be effectively used particularly for suppressing yellowing of polyurethane yarns.

These diisocyanates may be used alone or in combination of two or more.

Next, it is preferable to use at least one of a low molecular weight diamine and a low molecular weight diol as a chain extender used in the present invention.

Incidentally, a compound having a hydroxyl group and an amino group in the molecule, such as ethanolamine, may be used.

Preferred low molecular weight diamines include, for example, ethylenediamine, 1,2-propanediamine, 1,1,
3-propanediamine, hexamethylenediamine, 1,
4-cyclohexyldiamine, 1,3-cyclohexyldiamine, hexahydrometaphenylenediamine, 2-
Methylpentamethylenediamine, bis (4-aminophenyl) phosphine oxide, or the like can be used. One or more of these can be selected and used. Particularly preferred is ethylenediamine. By using ethylenediamine, a yarn excellent in elongation, elastic recovery, and heat resistance can be obtained.

A triamine compound capable of forming a crosslinked structure, such as diethylenetriamine, may be added to these chain extenders to such an extent that the effect is not lost.

As the low molecular weight diol, ethylene glycol, 1,3-propanediol, 1,4-butanediol, bishydroxyethoxybenzene, bishydroxyethylene terephthalate and the like can be used.

One or more of these can be selected and used. Particularly preferred are ethylene glycol, 1,3-propanediol, and 1,4-butanediol. When these are used, a diol-extended polyurethane having high heat resistance and high strength can be obtained.

From the viewpoint of obtaining fibers having high durability and strength, the number average molecular weight of the elastic yarn of the present invention is 40,000 to 15
It is preferably in the range of 10,000 or less.

In the present invention, the molecular weight is measured by GPC, and is converted by polystyrene. The polyurethane yarn of the present invention preferably has such a configuration.

In the present invention, the softening point of the soft segment of the elastic yarn is the melting point of the second run at the low temperature when the yarn is measured by DSC, and corresponds to the softening point of the so-called soft segment of polyurethane.

The fineness and cross-sectional shape of the elastic yarn used in the present invention are not particularly limited. For example, the cross section of the elastic yarn may be circular or flat.

The elastic yarn used in the present invention has no problem even if it contains various stabilizers and pigments. For example, in order to improve heat setting property, mechanical setting property, and strength without adversely affecting properties such as elongation and stress relaxation, so-called BHT or Sumitomo Chemical is used as polyvinylpyrrolidone, light fastness, and antioxidant. Hindered phenol-based drugs such as "Sumilyzer" GA-80 manufactured by Kogyo Co., Ltd., various benzotriazole-based drugs such as "Tinuvin" manufactured by Ciba-Geigy, and "Sumitomo Chemical Co., Ltd." Phosphorus drugs such as Sumilizer "P-16", various hindered amine drugs such as "Tinuvin" manufactured by Ciba Geigy, and inorganic pigments such as titanium oxide, zinc oxide and carbon black, stearic acid Sterilization including metal soaps such as magnesium, silver and zinc, and their compounds , Deodorants, lubricants such as silicone and mineral oil, barium sulfate, cerium oxide, various antistatic agents such as betaine and phosphoric acid, etc. I do not care.

The elastic yarn used in the present invention preferably has a range of 1 to 40 dtex, more preferably 5 to 20 dtex.
The range of decitex.

The elongation at break is preferably 400% or more.

The inelastic yarn used in the present invention may be either a filament yarn or a spun yarn.

Specifically, the filament yarn is rayon, acetate, polyamide, polyester, acryl, polypropylene, vinyl chloride or other synthetic fiber or silk (raw yarn), and the mode is an original yarn or a temporary twisted yarn. Or any of yarns that are dyed, and composite yarns thereof.

These are preferably stable yarns that are easily twisted.

The spun yarn is a staple composed of natural fibers such as cotton, wool, hemp and silk, and synthetic fibers such as rayon, polyamide, polyester, acrylonitrile, polypropylene and vinyl chloride. Any spun yarn may be used.

In the present invention, when a filament yarn is used as the inelastic yarn, a commercially available twisting machine is used to draft the elastic yarn serving as the core component, and a single or double inelastic yarn is formed around the elastic yarn. Can be wound and coated. Also,
When a spun yarn is used as the non-elastic yarn, a commercially available spinning machine can be used to coat the periphery of the drafted elastic yarn with the non-elastic yarn.

In the present invention, the number of twists can be appropriately selected depending on the denier and the number of filaments of the counterpart material.

For example, in the case of a double-coated yarn, the lower twist is 10
It is preferably in the range of 00 to 3500 t / m, and in such a case, from the viewpoint of canceling the torque of the lower twist, the upper twist is preferably in the opposite direction to the lower twist,
The number of twists of the upper twist is preferably 0.7 to 0.9 times the number of twists of the lower twist.

In the present invention, from the viewpoint of obtaining a product having excellent elongation properties, the covering draft is
2 or more and 4 or less are preferable, and 2.4 or more and 3.2 or less are more preferable.

The total fineness of the coated elastic yarn of the present invention is 5
~ 300 decitex range is preferred, 10-200
The range of decitex is more preferred.

The fiber product of the present invention is characterized in that the coated elastic yarn that has been subjected to the heat treatment of the present invention is 10% to 90% of the coated elastic yarn.
It is preferably contained in the following range, more preferably in the range of 25% to 75%, and even more preferably in the range of 30% to 50%.

In order to further improve the fit and the feeling of wearing, the proportion of the coated elastic yarn of the present invention may be increased.

[0068]

The present invention will be described in more detail by way of examples.

The fit, appearance, transparency, touch, and sharpness in the present invention were evaluated on a four-point scale according to a wear test by 20 subjects (A: very good, B: good, B: normal, X: bad). Example 1 A commercially available dimethylacetamide solution (40% by weight) of PVP (K = 30) was added to 2011 g of a polyurethane dimethylacetamide solution (40% by weight) composed of PTMG, MDI and 1,4-butanediol having a molecular weight of 2900.
(% By weight) and stirred for 2 hours to obtain a sample solution. The resulting solution is discharged from a die into a gas having a dry atmosphere temperature of 380 ° C., and spin-dried at a speed of 540 m / min with a speed ratio of a godet roller and a winder of 1.40 to 14 dtex (monofilament). (A softening point of a soft segment of about 13 ° C.) was obtained. Such polyurethane elastic yarn,
Heat treatment was performed at −5 ° C. for 5 days.

A heat-treated polyurethane elastic yarn was used as a core yarn, and a nylon fiber of 7 dtex was covered to obtain a processed yarn.

Using such a processed yarn, knitting was performed with a commercially available pantyhose knitting machine.

This knitted fabric was steamed at 100 ° C. for 20 minutes.
After pre-setting for minutes, pantyhose was sewn using a tow closer. The pantyhose was dyed beige on a rotary dyeing machine. This dyeing stocking was inserted into a stainless steel footprint, attached to a setting device with a leg length of 70 cm, and finished and set to commercialize.

Table 1 shows the results of the wearing test. The pantyhose obtained was extremely excellent in fit.

[0074]

[Table 1]

[Example 2] The same polyurethane elastic yarn as in Example 1 was heat-treated at -5 ° C for 10 days. Using the heat-treated polyurethane elastic yarn, a processed yarn was manufactured under the same conditions as in Example 1. Using such a processed yarn, knitting was performed with a commercially available pantyhose knitting machine.

The knitted fabric was steamed at 100 ° C. for 20 minutes.
After pre-setting for minutes, pantyhose was sewn using a tow closer. The pantyhose was dyed beige on a rotary dyeing machine. This dyeing stocking was inserted into a stainless steel footprint, attached to a setting device with a leg length of 70 cm, and finished and set to commercialize.

Table 1 also shows the results of the wearing test. The pantyhose obtained was extremely excellent in fit. Example 3 A commercially available dimethylacetamide solution (40% by weight) of PVP (K = 30) was added to 2011 g of a polyurethane dimethylacetamide solution (40% by weight) composed of PTMG, MDI and 1,4-butanediol having a molecular weight of 2900.
(% By weight) and stirred for 2 hours to obtain a sample solution. The resulting solution is discharged from a die into a gas having a dry atmosphere temperature of 380 ° C., and spin-dried at a speed of 540 m / min with a speed ratio of a godet roller and a winder of 1.40 to 14 dtex (monofilament). (A softening point of a soft segment of about 13 ° C.) was obtained. The polyurethane elastic yarn was used as a core yarn, and a nylon fiber of 7 dtex was covered to obtain a processed yarn.

The processed yarn obtained was heat-treated at -5 ° C. for 5 days. Using the heat-treated yarn, the yarn was knitted by a commercially available pantyhose knitting machine.

The knitted fabric was steamed at 100 ° C. for 20 minutes.
After pre-setting for minutes, pantyhose was sewn using a tow closer. The pantyhose was dyed beige on a rotary dyeing machine. This dyeing stocking was inserted into a stainless steel footprint, attached to a setting device with a leg length of 70 cm, and finished and set to commercialize.

Table 1 also shows the results of the wearing test. The pantyhose obtained was extremely excellent in fit. [Example 4] The same processed yarn as in Example 3 was heat-treated at -5 ° C for 10 days. Using the heat-treated yarn, the yarn was knitted by a commercially available pantyhose knitting machine.

The knitted fabric was steamed at 100 ° C. for 20 minutes.
After pre-setting for minutes, pantyhose was sewn using a tow closer. The pantyhose was dyed beige on a rotary dyeing machine. This dyeing stocking was inserted into a stainless steel footprint, attached to a setting device with a leg length of 70 cm, and finished and set to commercialize.

Table 1 also shows the results of the wearing test. The pantyhose obtained was extremely excellent in fit. [Example 5] The same processed yarn as in Example 3 was heat-treated at -5 ° C for 5 days (hereinafter referred to as a heat-processed yarn).

The processed yarn used in Example 3 was heated at 24 ° C.
It was stored at × 55% for 5 days (hereinafter referred to as room temperature stored processed yarn). A pantyhose was commercialized in the same manner as in Example 3 using two heat-treated yarns and two normal-temperature-processed yarns among the four yarns.

Table 1 also shows the results of the wearing test. The pantyhose obtained was extremely excellent in fit. Example 6 A commercially available dimethylacetamide solution (40% by weight) of PVP (K = 30) was added to 2011 g of a polyurethane dimethylacetamide solution (40% by weight) composed of PTMG, MDI and 1,4-butanediol having a molecular weight of 2900.
(% By weight) and stirred for 2 hours to obtain a sample solution. The resulting solution is discharged from a die into a gas having a dry atmosphere temperature of 380 ° C., and spin-dried at a speed of 540 m / min with a speed ratio of a godet roller and a winder of 1.40 to 14 dtex (monofilament). (A softening point of a soft segment of about 13 ° C.) was obtained. The polyurethane elastic yarn was used as a core yarn, and a nylon fiber of 7 dtex was covered to obtain a processed yarn. Using such a processed yarn, knitting was performed with a commercially available pantyhose knitting machine.

The knitted fabric was steamed at 100 ° C. for 20 minutes.
After pre-setting for minutes, pantyhose was sewn using a tow closer. The pantyhose was dyed beige on a rotary dyeing machine. This dyeing stocking was inserted into a stainless steel footprint, attached to a setting device with a leg length of 70 cm, and finished and set to commercialize.

The obtained product was heat-treated at -5 ° C. for 5 days. Table 1 also shows the results of the wearing test. The pantyhose obtained was extremely excellent in fit. Example 7 A product was obtained under the same conditions as in Example 6. The obtained product was heat-treated at -5 ° C for 10 days. Table 1 also shows the results of the wearing test. The pantyhose obtained was extremely excellent in fit. [Comparative Example 1] The processed yarn used in Example 1 was heated at 24 ° C x 55.
% For 5 days. Example 1 using such a processed yarn
The pantyhose was commercialized in the same manner as.

Table 1 also shows the results of the wearing test. The resulting pantyhose was poor in fit. [Comparative Example 2] The processed yarn used in Example 1 was heated at 24 ° C x 55.
% For 10 days. A pantyhose was commercialized using such a processed yarn.

Table 1 also shows the results of the wearing test. The resulting pantyhose was poor in fit.

[0089]

According to the present invention, it is possible to obtain a coated elastic yarn having a high fit and a good feeling of wearing without changing the fineness of the existing elastic yarn or the polymer composition of the elastic yarn, and a product using the same.

When the coated elastic yarn of the present invention is used especially for clothes, the appearance quality, detachability, transparency, sharpness and the like are almost the same as or higher than those of ordinary ones. You can get something high.

[0091] Further, when a material having high fit and wearing feeling is required, it is possible to easily perform processing without developing a new elastic yarn. Due to having these excellent properties, not only the use of the coated elastic yarn of the present invention alone,
By combination with various fibers, for example, socks, stockings, circular knitting, tricot, swimwear, ski pants,
Work clothes, fireworks, clothes, golf trousers, wet suits, brassieres, girdle, gloves, gloves, socks, etc. ,
It can be applied to various uses such as artificial flowers, electric insulating materials, wiping cloths, copy cleaners and gaskets.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Hironori Uranaka 1-1-2 Sonoyama, Otsu-shi, Shiga F-term in the Shiga Plant of Toray DuPont Co., Ltd. (Reference) 3B018 AC01 AD07 4L002 AA05 AA06 AB04 AC01 BA01 EA06 FA03 4L036 MA04 MA06 MA39 PA17 PA45 RA24 UA25

Claims (8)

[Claims] 1. A method for producing a coated elastic yarn in which an elastic yarn is covered with a non-elastic yarn, wherein the elastic yarn is heat-treated at a temperature equal to or lower than a softening point of a soft segment of the elastic yarn. A method for producing a coated elastic yarn. 2. The method for producing a coated elastic yarn according to claim 1, wherein a heat treatment is performed before coating the elastic yarn with a non-elastic yarn. 3. The method for producing a coated elastic yarn according to claim 1, wherein the heat treatment is performed after coating the elastic yarn with a non-elastic yarn. 4. The method according to claim 1, wherein the elastic yarn is a polyurethane elastic yarn. 5. A coated elastic yarn produced by the method for producing a coated elastic yarn according to any one of claims 1 to 4. 6. A textile product comprising the coated elastic yarn according to claim 5. 7. A method for producing a fiber product, wherein a fiber product containing a coated elastic yarn obtained by coating an elastic yarn with a non-elastic yarn is heat-treated at a temperature equal to or lower than the softening point of the soft segment of the elastic yarn. . 8. A textile product produced by the method for producing a textile product according to claim 7.