JPH05163632A - Stretchable fabric - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide a fabric having excellent water repellency and having stretchability that adapts to intense exercise. [Structure] A block polyester having a phthalic acid as a main acid component and an aliphatic diol having 5 to 12 carbon atoms between hydroxyl groups as a main diol component and having a melting point of 50 ° C. or less as a soft segment and a polybutylene-based polyester as a hard segment. The surface of a cloth made of an elastic yarn consisting of a fine denier fiber having a single yarn fineness of 1.2 denier or less is covered with a fine loop of the fine denier fiber to make it water repellent.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to a stretchable fabric.
More specifically, it relates to a stretchable cloth having a water-repellent function.

[0002]

2. Description of the Related Art As a water-repellent cloth, conventionally, a fine fiber is woven into a high-density woven fabric, and the woven fabric is subjected to a water-repellent treatment, or a mixed fiber composed of a high shrinkage fiber and a low shrinkage fiber or a crimped yarn. A method has been proposed in which a woven fabric in which the air content of the fabric surface layer is increased by using a yarn is used, and the fabric is subjected to a water repellent finish. The water-repellent cloth obtained by such a method is excellent in terms of moisture permeability and water repellency, but the cloth has little stretchability and has a deficient mobility.

In order to solve the above drawbacks, Japanese Patent Laid-Open No. 3-1
No. 85152 discloses an elastic yarn composed of a polyetherester block copolymer having a polybutylene terephthalate-based polyester as a hard segment and a polyoxybutylene glycol-based polyester as a soft segment and a polyetherester block-based polyester as a soft segment. Use is disclosed.

However, since a stabilizer is added to the polymer constituting the elastic yarn to impart weather resistance, chlorine resistance, etc., after passing through a step of extracting the stabilizer such as dry cleaning. Has the drawback of poor weather resistance and chlorine resistance

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to solve these drawbacks and to provide a fabric having excellent water repellency and elasticity which is suitable for intense exercise.

[0006]

Means for Solving the Problems Polyester having a melting point of 50 ° C. or less, which contains phthalic acids as a main acid component and an aliphatic diol having 5 to 12 carbon atoms between hydroxyl groups as a main diol component, is used as a polybutylene-based polyester. A fabric comprising an elastic yarn made of block polyester as a hard segment and a fine denier fiber having a single yarn fineness of 1.2 denier or less, wherein the surface of the fabric is covered with fine loops of the fine denier fiber. The stretchable fabric is characterized in that the fine loop has a length of 5 to 300 μm and is water repellent.

The block polyester constituting the elastic yarn in the present invention has, as a soft segment, phthalic acids as a main acid component and an aliphatic diol having 5 to 12 carbon atoms between hydroxyl groups as a main diol component and a melting point of 50 ° C. or less. Polyester is used. Here, phthalic acids refer to phthalic acid, isophthalic acid, and terephthalic acid, but especially because the polyester obtained is an amorphous polymer or a polymer having a melting point of 50 ° C. or less, and due to the problem of scattering during production, etc. , Isophthalic acid is often used. On the other hand, as the diol component, 1,6-hexanediol, 1,1
Linear diol such as 0-decanediol, 3-methyl-
Branched diols such as 1,5-pentanediol and 2-methyl-1,8-octanediol are mentioned. The soft segment constituting the block polyester of the present invention has such acid and diol components as main constituents.
A copolymer of 0 mol% or less, preferably 30 mol% or less of other components may be used. In this case, as the copolymerization component, there are other dicarboxylic acids and diols. Copolymerization of an aliphatic dicarboxylic acid or an ether glycol such as polyoxytetramethylene glycol for the purpose of improving the characteristics at a low temperature is one preferable measure.

On the other hand, the polybutylene terephthalate polyester used as the hard segment refers to polybutylene terephthalate or its copolymer, and the copolymerization ratio is 30 mol% or less, preferably 20 mol% or less. However, since this copolymerization ratio often occurs during the blocking reaction, the melting point of the finally obtained block polyester is 170 ° C. or higher, preferably 180 ° C. or higher.

The block polyester of the present invention is a copolymer that allows the polyester to be dyed with a cationic dye or an acid dye on either or both of the soft segment and the hard segment, for example, a sulfoisophthalic acid compound, a tertiary compound. It is preferable that an amine, a quaternary ammonium, a quaternary phosphonium compound, or the like is copolymerized or blended.

It is desired that the block polyester has an intrinsic viscosity of 0.8 or more, preferably 0.9 or more. This is because the strength of the fiber becomes low.

Such a block polyester is generally composed of a polyester which constitutes a soft segment,
A method of forming an appropriate block by melt-mixing and reacting with a polyester constituting a hard segment is used, but the method is not particularly limited to this method.

In the present invention, the block polyester is used as a fiber, and the production method is generally a melt spinning method. The spinning method is not particularly limited, and the molten polyester may be simply taken out from the spinneret, cooled and solidified, and then wound. Stretching if necessary,
Heat treatment is also possible, but it depends on the application. As the oil agent, for example, a silicone-based material is used, but it is not necessary to be particular about this.

The surface of the fabric of the present invention is covered with fine loops of fine denier fiber, and the length thereof is 5 μ to 3 μm.
However, in order to obtain such a fine loop, it is preferable to use the following method.

For example, as fine denier fibers, two or more multifilaments having different heat shrinkages are mixed, twisted,
Mixing is performed by treatment such as entanglement, and the mixed yarn is knitted or woven at a high density to obtain a high-density cloth. By heat-treating the cloth in a post-processing step, a difference in heat shrinkage is developed on the surface of the cloth, and fine loops composed of the multifilament are formed on the surface of the cloth. Alternatively, a single fine denier fiber multifilament is subjected to bulky processing by a method such as Woolly processing, then woven and knitted at a high density, and the woven and knitted product is further three-dimensionalized by a dyeing process to form irregularities on the surface. It can also be a high density fabric. At this time, it is also a preferable method to use a mixed yarn composed of two or more fine denier multifilaments having a heat shrinkage difference, instead of a single fine denier multifilament.

Further, in order to form a fine fine loop on the fabric surface, it is effective to use a multifilament having a denier of 1.2 or less. When the cloth having a large loop which is not dense is subjected to the water repellent treatment, good water repellency cannot be obtained because water is retained in the loop even after the water repellent treatment. The length of the fine loop on the surface of the fabric is a fine loop of 5 μ to 300 μ, but it is suitable to form the fine loop of 30 μ to 150 μ. The length of this loop is obtained by taking a photograph of the cross section of the cloth with an electron microscope at a magnification of 100 to 300 times and reading the height of the single yarn loop rising from the adjacent yarns.

The fine denier multifilament fibers include fibers made of polyester, polyamide, polyolefin, etc., split type polyamide / polyester mixed fibers, sea-island type polyamide / polyester fibers, and the like. When mixed multi-filaments or mixed fibers of low denier multi-filaments with low heat shrinkage and multi-filaments with high heat shrinkage are used, the heat treatment by post-processing causes the multi-filaments to become bulky due to the difference in shrinkage and become dense on the fabric surface. Thus, a fine loop can be easily formed.

The method of mixing the multifilament of denier fiber with the elastic yarn may be such that the elastic yarn may be coated with the multifilament, or may be used for cutting the yarn and coated with the multifilament, or It may be used as a bare yarn and interwoven and woven with the multifilament. To cover the elastic yarn with the multifilament, there are a method of covering with a twisting machine using a hollow spindle, a method of twisting aligned yarns, and a method of applying the difference in their elongation.

The fabric using the yarn obtained by such a method is dyed and finished by an ordinary method.

The water-repellent finishing treatment may be carried out by a known method which is usually used in the dyeing finishing step. For example, a method of applying a silicon thread or a fluorine-based water repellent by a spray method, a padding method, a dipping method, a coating method, or the like. Above all, the padding method is the best for uniformly applying the water repellent to the cloth.

[0020]

The elastic yarn of polyetherester yarn has been known so far, but it is indispensable to use a light stabilizer in combination, and the stabilizer falls off after dry cleaning. It has not been possible to obtain a stretchable fabric.

In this respect, in the present invention, as the elastomer constituting the elastic yarn, phthalic acids are the main acid component as the soft segment and the aliphatic diol having 5 to 12 carbon atoms between the hydroxyl groups is the main diol component, and the melting point is 50 ° C. It has been found that when the following polyester-introduced polymer of polyester ester yarn is adopted, the weather resistance can be substantially maintained without the combined use of a light stabilizer.

The fabric of the present invention is a fabric composed of a yarn in which a multifilament having a denier of 1.2 denier or less and an elastic yarn are mixed, and has fine fine loops on the surface thereof, and the fine loops are Since it is water repellent, it has excellent water repellency and permanent elasticity at the same time.

The stretchable fabric of the present invention is a stretchable fabric having moisture permeability and water repellency, and is a new functional fabric used for ski wear and the like.

[0024]

Examples Fine denier polyethylene terephthalate multifilaments having a boiling water shrinkage of 8% (total denier 64 denier, 144 filaments) and polyethylene terephthalate multifilaments having a boiling water shrinkage of 17% (total denier 50 denier, 24 filaments) ) Was used as a fine denier fiber.

On the other hand, 70 parts of dimethyl isophthalate, 12 parts of dimethyl terephthalate, 40 parts of decanedicarboxylic acid,
150 parts of hexamethylene glycol was heated together with 0.17 part of dibutyltin diacetate to remove by-product methanol and water. Further, after increasing the degree of polymerization by a reaction under reduced pressure, 52 parts of polybutylene terephthalate obtained by separately carrying out a polymerization reaction was added. The mixture was reacted at 250 ° C. under reduced pressure, and after 15 minutes, 0.06 of phenylphosphonic acid was added. After discharging and cooling, the mixture was cut into chips. This polyester had an intrinsic viscosity of 1.10 and a melting point of 192 ° C.

The chips were dried at 140 ° C. under a nitrogen stream and then melt-spinning equipment was used to remove 25 from a 6-hole spinneret.
It was discharged at 0 ° C. and wound up at 400 m / min. This yarn had a 40 de elongation of 580% and a strength of 0.85 g / de.

The elastic yarn is used as a core yarn, and the mixed yarn is used as a sheath yarn for a single cover to make a total denier 300.
A covering yarn having 200 denier filaments was obtained. This yarn was used for the warp and weft, and a plain fabric having a total cover factor of 2050 was prepared. (Warning density 90 pieces / 2.
54 cm weft density 60 / 2.54 cm). The woven fabric was subjected to scouring, relaxing, drying, presetting and dyeing (130 ° C. × 45 minutes) drying according to a usual method. However, the scouring and relaxing steps were carried out under as low tension as possible so that the difference in shrinkage of the multifilaments constituting the woven fabric was sufficiently expressed. The dyed and dried cloth was subjected to water repellent treatment with a usual fluororesin having the following formulation.

[0028]

[Table 1]

After applying the water repellent treatment liquid to the cloth by the padding method, the cloth is dried at a temperature of 120 ° C. and then 16
Heat treatment was performed at a temperature of 0 ° C. for 1 minute to obtain a finished fabric. Fine loops in the range of 30 μ to 100 μ were observed on the surface of the fabric.

Further, this product was subjected to dry cleaning using Perkren and repeated 20 hours of light resistance test using a fade meter five times, and then only the elastic yarn was taken out to measure the strength retention rate. , 70% or more.

[0031]

[Comparative Example] Fine denier polyethylene terephthalate multifilament having a boiling water shrinkage of 8% (total denier 64 denier, 144 filaments) and polyethylene terephthalate multifilament having a boiling water shrinkage of 17% (total denier 50 denier, 24 filaments) ) Was used as fine denier fiber. On the other hand, 167.3 parts of dimethyl terephthalate, 105 parts of tetramethylene glycol, 275 parts of polytetramethylene glycol having a number average molecular weight of 2000, and 0.2 parts of tetrabutyl titanate were charged into a reactor, and transesterification reaction was carried out at an internal temperature of 190 ° C. .. When about 70% of the theoretical amount of methanol was distilled, the internal temperature was raised to 200 ° C. to 240 ° C., and the reaction was performed under a weak vacuum for 60 minutes and then under a high vacuum for 200 minutes. The formed polyether / ester block copolymer is made into chips, the chips are dried and then melted at 250 ° C., and extruded with a cap having a 6-hole nozzle.
An elastic thread of de / 6fil was obtained.

A single cover was made by using the above-mentioned elastic yarn as a core yarn and the above-mentioned mixed yarn as a sheath yarn, and a covering yarn having a total denier of 300 denier and a number of filaments of 200 and the obtained yarn were used for a background and a total cover factor 2050. A plain weave fabric was produced. (Warning density 90 yarns / 2.54 cm, weft density 60 yarns / 2.54 cm) This plain woven fabric was used as the dyeing finish in the same manner as in Example 1. The surface of the fabric is 30μ-1
Fine loops in the 00 μ range were observed.

Further, this product was repeatedly subjected to a dry cleaning using Perkren and a light resistance test for 20 hours using a fade meter five times, and then only the elastic yarn was taken out, but the yarn was broken.

The performance of the finished fabric is listed in Table 2.

[0035]

[Table 2]

The elongation% was set to a width of the sample fabric of 5 cm and a gripping interval L _{0 of} 20 cm, a load of 1.5 kg was hung on the lower end, and 10 minutes after the load was applied, the interval L ₁ of the mark was measured immediately. , Extension rate% = (L ₁ −L ₀ ) × 100 / L _{0 When} the measurement of the extension rate is completed, immediately remove the upper and lower grips and the load, leave the sample piece on a horizontal table for 60 minutes, and then set the mark interval L. Measure ₂ .

The distortion rate is calculated by the following equation.

Distortion rate% = (L ₂ −L ₀ ) × 100 / L ₀

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification number Internal reference number FI Technical display location D06M 13/00 (72) Inventor Masaaki Sekimoto 1-6-7 Minamihonmachi, Chuo-ku, Osaka-shi, Osaka Teijin Limited

Claims (1)

[Claims] 1. A polyester having a phthalic acid as a main acid component and an aliphatic diol having 5 to 12 carbon atoms between hydroxyl groups as a main diol component and having a melting point of 50 ° C. or less is used as a soft segment and a polybutylene-based polyester is used as a hard segment. A fabric comprising elastic yarn made of block polyester and fine denier fiber having a single yarn fineness of 1.2 denier or less, the surface of the fabric being covered with fine loops of the fine denier fiber. Loop
A stretchable fabric having a length of 5 to 300 μm and a water repellent finish.