JPH09158049A - Antielectric, sweat-absorbing and antifouling fabric improved in durability to washing - Google Patents

Abstract

PROBLEM TO BE SOLVED: To produce the subject fabric having all of antistatic, sweat-absorbing and antifouling properties, good in washing durability and useful as general clothes as well as dust-free clothes by fixing a water-absorbing polymer which is not swollen by water onto the surface of a polyester fiber constituting a fabric. SOLUTION: Both of a water-absorbing polymer layer which is not swollen by water and a hydrogel layer are independently formed on the surface of a polyester fiber constituting a fabric and at least a part of the water-absorbing polymer is coated with the hydrogel layer. The hydrogel is not mixed in the water-absorbing polymer layer and charged pressure of fabric due to abrasion, sweat-absorbing property and recontamination after washing 50 times are <=1.5KV, <=10sec. and >=4 class, respectively.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a polyester cloth which has three functions of antistatic property, sweat absorption property and antifouling property, and whose washing durability is remarkably improved.

[0002]

2. Description of the Related Art Conventionally, as a method for obtaining a polyester fiber cloth having both antistatic and sweat absorbing functions, a method of applying an agent having both antistatic and sweat absorbing characteristics to the polyester fiber cloth and controlling the cloth have been used. A well-known method is to apply an electric agent and a sweat absorbent, or a method to apply a sweat absorbent to a fabric composed of polyester antistatic yarn.

For example, in JP-A-53-148281, a cloth is impregnated with a monomer of an antistatic antifouling agent having an acrylic acid ester group at both ends, and then steaming treatment is performed in a wet state, followed by heat treatment, A method of forming a polymer coating on the surface of the cloth by washing with hot water is disclosed.

However, since the above-mentioned monomer has poor dispersibility in water, not only does it cause adhesion unevenness, but also the polymerization rate due to steaming is low, and unreacted monomers and agents with a low polymerization degree after washing with hot water are used. However, there is a problem in that it becomes scum and redeposits on the cloth. In addition, it is the actual situation that the function of anti-static perspiration and sweat is remarkably reduced after several washings.

[0005]

SUMMARY OF THE INVENTION The object of the present invention is to solve the problems of the above-mentioned prior art and to have three functions of antistatic property, sweat absorption property and antifouling property, and moreover, its washing durability is remarkably high. Another object is to provide an improved polyester fiber fabric.

[0006]

Means for Solving the Problems As a result of intensive studies for achieving the above object, the present inventors have found that a polyester fiber cloth has a water-absorbing polymer that does not swell with water (hereinafter sometimes simply referred to as a water-absorbing agent) and a hydrogel. It has been determined that the desired fabric can be obtained when both layers of gel are formed independently and at least part of the water-absorbing agent layer is covered with a hydrogel layer.

That is, according to the present invention, a fabric mainly composed of polyester fibers and simultaneously satisfying the following requirements (a) to (c), wherein hydrogel is present on the surface of the polyester fibers constituting the fabric: A water-absorbing polymer which is not mixed and does not swell with water is fixed, and at least a part of the polymer is coated with a hydrogel. A soiled fabric is provided. (A) Friction electrification voltage after 50 times of washing is 1.5 KV or less (b) Sweat absorption after 50 times of washing is 10 seconds or less (c) Re-contamination of washing after 50 times of washing is 4 or more

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION The polyester fiber used in the present invention comprises terephthalic acid as a main dicarboxylic acid component,
A fiber composed of a polyester containing at least one glycol, preferably at least one alkylene glycol selected from ethylene glycol, trimethylene glycol, tetramethylene glycol and the like as a main glycol component.

If necessary, the polyester contains a stabilizer, an antioxidant, a flame retardant, an antistatic agent, a fluorescent brightening agent, a catalyst, an anti-coloring agent, a heat-resistant agent, a coloring agent, inorganic particles and the like. Good.

The cross-sectional shape of the fiber is not particularly limited, and any conventionally known fiber can be arbitrarily used. Particularly, when hollow polyester fibers having communication holes from the fiber surface to the hollow portion are used, Shows a more remarkable effect of improving washing durability.

The hollow fiber can be produced by a conventionally known method, and for example, the method described in Japanese Utility Model Publication No. 2-43879 can be arbitrarily adopted.

The hollow ratio of the hollow fiber is preferably 5 to 40% in order to maintain the mechanical properties of the fiber, and 2
It is more preferably 0 to 40%.

A method for forming a communication hole from the fiber surface to the hollow portion in such a hollow fiber is described, for example, in the case of polyester hollow fiber, as described in JP-B-61-60188 and JP-B-61-31231. As described above, a method of forming fine pores communicating from the surface of the hollow fiber to the hollow portion by subjecting the polyester hollow fiber, to which the metal salt of an organic sulfonic acid is added and blended, to alkali reduction treatment can be arbitrarily adopted.

Further, by subjecting the high hollow fibers having a hollow ratio of 20% or more to alkali reduction treatment, the low orientation portion and // along the longitudinal direction of the fibers can be obtained without using the above-mentioned metal salt of organic sulfonic acid. Alternatively, a communication hole can be formed as a removal trace of the deformation strain concentration portion (Japanese Patent Laid-Open No. 7-26466).

Further, the cloth mainly composed of polyester fibers used in the present invention means a woven or knitted fabric using only polyester fibers, a non-woven fabric, a mixed product of polyester fibers and nylon fibers, a mixture of polyester fibers and cotton. A product, a mixed product of polyester fiber and wool, a mixed product of polyester fiber and rayon, and the like containing 50% or more of polyester fiber.

The water-absorbing agent used in the present invention has sufficient water-absorbing (sweat-absorbing) performance, has a volume swelling ratio of 10% or less after being immersed in water at 20 ° C. for 24 hours, and has a solubility in water of 10%. The following are preferred.

When a water absorbing agent having a volume swelling ratio of more than 10% is used, the hydrogel is likely to fall off during washing of the cloth, and the durability cannot be maintained.

When a water-absorbing agent having a solubility in water of more than 10% is used, the amount of the water-absorbing agent dropped off becomes large when the soaping described later is performed, and as a result, the hydrogel exhibiting its functionality is dropped off. In some cases, sufficient effects may not be achieved.

Specific examples of the water absorbing agent include block copolymers of polyester composed of terephthalic acid and / or isophthalic acid and alkylene glycol, and polyalkylene glycol. The reason why polyester is used as the polymerization component is to increase the affinity and adhesive force with the polyester fiber.

The block copolymer includes terephthalic acid-alkylene glycol-polyalkylene glycol,
Terephthalic acid-isophthalic acid-alkylene glycol-
A block copolymer obtained by reacting polyalkylene glycol, terephthalic acid-isophthalic acid-alkylene glycol-polyalkylene glycol monoether, and the like are included.

The above alkylene glycol includes ethylene glycol, propylene glycol, tetramethylene glycol, decamethylene glycol and the like, and the polyalkylene glycol includes polyethylene glycol, polypropylene glycol, tetramethylene glycol and the like.

Further, the polyalkylene glycol monoether includes monomethyl ether such as polyethylene glycol and polypropylene glycol, monoethyl ether and the like, and the molecular weight of these polyalkylene glycol and its monoether is 400 to 100,000.
It is.

The composition ratio of terephthalate units to isophthalate units of these block copolymers is arbitrary, and terephthalate units + isophthalate units: polyalkylene glycol units = 1: 1 to 20: 1 (molar ratio).
It is.

Here, the main action of the water-absorbing agent is to fix the water-absorbing agent to the cloth and then coat the water-absorbing agent layer with the hydrogel. It is to allow uniform and rapid penetration into the gap.

Further, the hydrogel used in the present invention has sufficient antistatic properties, water absorption properties and antifouling properties, and at 20 ° C.
Of water has a volume swelling ratio of 5 after being immersed in water for 24 hours.
00% or more is preferable, and specifically, a polymer formed from a polyethylene glycol group-containing polycationic compound and diglycidyl ether, polyvinyl methyl ether cross-linked gel, poly-N-isopropyl acrylic acid, methyl cellulose, poly (N-2-methoxyethyl-N-ethyl acrylic acid), polyoxyethylene nonyl phenyl ether, sodium acrylate-acrylic acid copolymer gel, polymer formed from polyallylacine and guanyl-O-methylisourea, N -Examples include polymers formed from isopropyl acryl acid and N, N'-methylenebisacryl acid, or polymers formed from polyethylene glycol group-containing polycationic compounds and diglycidyl ether and mokuglycidyl ether. It is.

It is necessary that the cloth of the present invention is composed mainly of polyester fibers to which a water absorbing agent is fixed, and at least a part of the water absorbing agent is coated with hydrogel.

Here, the polyester fiber to which the perspiration absorbing agent is fixed refers to a single fiber or yarn obtained by impregnating and adhering the above-mentioned water-absorbing polymer which does not swell with water, and then drying and curing to fix and form the polymer. .

That is, in the fabric of the present invention, since the two layers of the water-absorbent polymer layer fixed to the polyester fiber and the hydrogel layer covering the water-absorbent polymer layer are independently present, The function provided by the upper layer hydrogel can be sufficiently exhibited.

As a specific method for producing the above-mentioned cloth, first, a polyester fiber cloth is treated with a water-absorbing polymer by a combination method during dyeing (perspiration in the bath), a pad method, a coating method or a spray method. The compound capable of forming is impregnated and adhered, dried and then cured to fix the polymer to the fiber. At this time, it is necessary to use a water-absorbing polymer that does not contain hydrogel.

The drying conditions at this time are 100 to 130 ° C. and 1
~ 5 minutes, and the curing condition is 150 ~ 180 ° C.
0 seconds to 3 minutes are preferably employed.

Then, a compound capable of forming a hydrogel is impregnated and adhered to the above-mentioned cloth by a pad method, a coating method, a spray method or the like, and after drying and curing, the water-absorbent polymer is coated with the hydrogel. You can At this time, the hydrogel may be mixed with a small amount of a temporary antistatic agent or the like that does not form a polymer as long as the effect of the present invention is not impaired, but if a hydrogel containing substantially no water-absorbing agent is used, It is preferable because the effect of the present invention is remarkably exhibited.

The drying conditions and curing conditions may be the same as those for the sweat-absorbent polymer.

Further, after coating with hydrogel, 20 to 8
Soaping in water at 0 ° C. for 10 to 20 minutes is preferable. Excessive antistatic agent or dye that has bleed out into the agent is removed by performing soaping, so that when coated with hydrogel, the aforementioned independent layer is easily formed, and the effect of the present invention is remarkable. Express.

After the polyester fiber is subjected to the above treatment, the fiber may be woven or knitted to form a cloth.

The polyester fiber cloth thus obtained has good antistatic property, sweat absorption property and antifouling property, and
Its washing durability is remarkably improved, and even after 50 times of washing, it has a high antistatic property of 1.5 KV or less, wicking property of 10 seconds or less, and anti-staining property due to re-contamination of washing is of 4th grade or higher. Maintains good durability.

[0036]

[Advantages] Both the conventional method of applying an agent having both antistatic property and sweat absorbing property to a polyester fiber cloth, and the method of applying an antistatic agent and a sweat absorbing agent to the cloth respectively, both adhere the agent to the polyester fiber. Since it is poor in property, it easily fell off by washing and the like, and only a fabric having poor durability was obtained.

On the other hand, the polyester fiber cloth of the present invention comprises a water-absorbent polymer layer which is fixed to the fiber and does not swell with water, and a hydrogel layer which covers the water-absorbent polymer layer.
Since the two layers exist independently, the function of the upper layer agent can be fully expressed, and the hydrogel layer can be prevented from falling off due to washing, etc., and anti-static, sweat absorption and antifouling performance can be durable. The character can be improved significantly.

Although the details of the reason are not clear, when the water-absorbent polymer layer is first formed by the above-mentioned method and then the water-absorbent polymer layer is coated with the hydrogel layer, the water-absorbent polymer is obtained. Among the components of, the polyethylene terephthalate group is more coordinated to the surface of the polyester fiber,
It is considered that more polyethylene glycol is present in the outer layer.

The polyethylene glycol chain and the chain of the hydrogel polymer have a molecular entanglement. As a result, both coatings adhere firmly to the surface of the fiber, so that the durability effect is improved. It is presumed to occur.

From another point of view, it can be said that the water-absorbent polymer plays a role of an anchor for connecting the fiber and the hydrogel layer.

[0041]

The present invention will be described more specifically with reference to the following examples. In addition, each physical property in an Example was measured by the following method.

(1) Antistatic property In accordance with JIS L-1094 B method, a friction static voltage in an atmosphere of a temperature of 20 ° C. and a humidity of 40% RH for a cotton cloth is measured by using a rotary static tester of Kyoto University. It was measured.

(2) Water Absorption JIS L-1079-66 and JIS L-1018
According to -70, one drop of distilled water in a buret was dropped on the cloth, and the time when the reflection disappeared was measured.

(3) Antifouling property (wash redeposition) Device and material Round odometer 42 ± 2r. p. m. Standard stainless steel bottle 450cc Stainless steel ball 6.4mm diameter, 15 per bottle Homogenizer Separable flask Dry stain Carbon black (Mitsubishi Kasei # 100) Egg albumin sodium chloride detergent Sodium alkylbenzene sulfonate Sodium tripolyphosphate Sodium sulfate ( 10 water salt) Oil component stearic acid, triolein oleate, tristearin oleyl alcohol stearyl alcohol cholesterol solid paraffin (mp 58-60 ° C) formalin 37% conc.

Preparation of test piece From the place where the ears were removed, one test piece measuring 8 cm × 8 cm was taken.

Test Operation After making the following contaminated liquid and adding the sample, the sample was attached to a round odometer, the bottle was sealed, and the bottle was operated at 50 ° C. for 20 minutes. Then, the sample is taken out, washed with running water for 2 minutes, and naturally dried.

(Note 1) Method for preparing a contaminated liquid First, 0.3 g of carbon black, 3 g of egg albumin and 3 g of sodium chloride are placed in a beaker and stirred with a glass rod to make dry stain.

Next, stearic acid, oleic acid, triolein, tristearin, oleyl alcohol, stearyl alcohol, solid paraffin and cholesterol were sampled at a ratio of 5: 5: 5: 5: 5: 5: 10: 1, Dissolve and stir at a temperature of 60 to 70 ° C. to make a uniform component, and then cool to prepare an oily stain.

Then, 16 g of a detergent obtained by dissolving 7.5 parts of sodium alkylbenzene sulfonate, 15 parts of sodium sulfate (10 hydrate) and 7.5 parts of sodium tripolyphosphate in distilled water and the above oily stains. 2 g was mixed at 70 ° C., the dry stain was added thereto, and the mixture was stirred with a glass rod.

Subsequently, 332 cc of water was gradually added to the above mixed solution, and the mixture was put in a homogenizer cup again and 3
After stirring for 3 minutes, transfer to a 1 liter wide-mouth bottle and
Add 35 cc of 7% formalin and 500 cc of water and shake gently.

The obtained contaminated liquid is left for one day after preparation and used for a storage period of one month.

Judgment Judgment of contamination is based on gray scale according to JIS L-0801.
Follow -78.

(4) Laundry A household washing machine was used, and Zab (manufactured by Kao Corporation) was used as a detergent, and the following steps (a) to (c) were repeated once a predetermined number of times. (B) 40 g at a bath ratio of 1:30 using 2 g / l of detergent
Wash for 10 minutes at ℃. (B) After dehydration, wash with water at a bath ratio of 1:30 at room temperature for 2 minutes.
This is repeated twice. (C) After dehydration, air dry.

[Example 1] 60 denier / 36 filament (triangular cross section yarn) for warp and 75 denier / 36 for weft
Filament (2 yarns each, S twist is 300)
0T / M, Z-twist 3000T / M polyester defilament woven fabric (warp density 158 /
Inch, weft density 90 lines / inch)
Relax, preset, alkali weight loss (weight loss rate 15
%), Followed by dyeing and reduction washing under the following conditions.

(Staining conditions) Sumikaron Navy Blue S-2GL (Sumitomo Chemical) 4% owf Disper VG (Meisei Chemical) 0.5 g / l Acetic acid 0.3 g / l Water absorbing polymer (Takamatsu Oil-and-fat water-absorbing agent, SR-1000) 5% owf-130 ° C x 60 minutes In addition, the above water-absorbent polymer used was one that does not swell with water.

(Reduction cleaning conditions) -Hydrosulfite 2 g / l-Caustic soda 2 g / l-Surfactant (amylazine) 2 g / l-80 ° C. × 20 minutes

The obtained woven fabric was washed with water and dried, padded with a treatment liquid having the following composition, squeezed at a pickup rate of 60%, dried at 130 ° C. for 4 minutes, and then heat-treated at 170 ° C. for 1 minute. . (Treatment liquid composition) -5.0% by weight solution of polycationic compound (Nissuka Chemical Co., Ltd., Nicepol F-9160) -Diglycidyl ether (Nikaka Chemical Co., Ltd., NK Assist EP) 0.5 wt% solution

The above treatment liquid was evaporated to dryness in a beaker and heat-treated at 170 ° C. for 1 minute to prepare a film, then water at 20 ° C. was put in the beaker, and the volume swelling ratio of the film after 24 hours was changed. When measured, it was 600%.

Subsequently, the above woven fabric was washed with water at room temperature for 20 minutes, dried, and heat-treated at 170 ° C. for 45 seconds. Table 1 shows the antistatic performance, water absorption performance, antifouling performance, and washing durability of the obtained woven fabric.

[Example 2] In Example 1, the warp was
75 denier / 48 filament (Z twist, 350T /
M) polyester multifilament and 75 denier / 24 filament (S twist, 600T / M) polyester multifilament two-ply yarn, and weft,
2 yarns of 150 denier / 72 filament polyester wooly processed yarn (S twist, 1800 T / M and Z twist,
The same procedure as in Example 1 was carried out except that a fine crepe woven fabric (1800 T / M) (warp density: 154 threads / inch, weft density: 60 threads / inch) was used.

Table 1 shows the antistatic performance, water absorption performance, antifouling performance and washing durability of the obtained woven fabric.

[Example 3] The hollow ratio of warp and weft is 3
5%, 75 denier / 36 filament round hollow cross-section polyester multi-filament yarn (twist number of warp and weft is S twist 300T / M) is used, and warp density is 110 / inch, weft density is 80 / inch After the preparation, scouring, relaxing, presetting, and alkali weight loss (weight loss rate 15%) were carried out in the usual way.

The multifilament yarn was taken out from the obtained cloth and the surface thereof was observed by an electron microscope. As a result, the width was 0.2 to 3.0 μm per 100 μm in the fiber axis direction.
At least one microgroove having a length of 10 to 100 μm was present.

The above fabric was dyed, reduced and washed under the same conditions as in Example 1, washed with water and dried, then padded with a treatment liquid having the same composition as in Example 1, dried and heat treated.

Subsequently, the above woven fabric was subjected to reduction washing at 60 ° C. for 20 minutes, then washed with water and dried, and further at 170 ° C. for 30 minutes.
Heat treated for seconds. Antistatic performance, water absorption performance of the obtained fabric,
Table 1 shows the antifouling performance and its washing durability.

Comparative Example 1 The same fabric used in Example 1 was mixed with the treatment liquid having the following composition in the same bath and padded, squeezed at a pickup rate of 60% and dried at 130 ° C. for 3 minutes. And then heat treated at 170 ° C. for 1 minute. Table 1 shows the antistatic performance, water absorption performance, antifouling performance, and washing durability of the obtained woven fabric. <Treatment liquid composition> SR-1000 (water absorbing agent, manufactured by Takamatsu Yushi Co., Ltd.) 1% owf • 5.0% by weight solution of polycationic compound (Nissuka F-9160, manufactured by Nichika Chemical Co., Ltd.) • Diglycidyl 0.5 wt% solution of ether (NK Assist EP, manufactured by Nichika Chemical Co., Ltd.)

Comparative Example 2 The procedure of Example 1 was repeated except that the water-absorbent polymer was not added during dyeing. Antistatic performance, water absorption performance of the obtained fabric,
Table 1 shows the antifouling performance and its washing durability.

[Comparative Example 3] The same fabric as that used in Example 1 was dyed by adding a water-absorbing polymer at the time of dyeing in the same manner as in Example 1, followed by reduction washing, water washing and drying, and then 170 Heat-treated at 0 ° C for 1 minute (hydrogel polymer was not applied to the fabric).

Table 1 shows the antistatic property, water absorption property, antifouling property and washing durability of the obtained woven fabric.

[0070]

[Table 1]

[0071]

EFFECT OF THE INVENTION According to the present invention, a polyester fiber cloth having both a good antistatic property, a water absorbing property, and an antifouling property and having a markedly improved durability to washing and having a soft texture is provided. Obtained, not only for general clothing use,
In particular, it can be widely used for uniforms such as dust-free garments, aseptic garments, and sports clothing.

Claims (7)

[Claims] 1. A cloth mainly composed of polyester fibers, which simultaneously satisfies the following requirements (a) to (c), wherein the surface of the polyester fibers constituting the cloth is free from hydrogel and is not mixed with water. An antistatic sweat-absorbent antifouling fabric with improved washing durability, wherein a non-swelling water-absorbent polymer is fixed, and at least a part of the polymer is coated with a hydrogel. (A) Friction electrification voltage after 50 times of washing is 1.5 KV or less (b) Sweat absorption after 50 times of washing is 10 seconds or less (c) Re-contamination of washing after 50 times of washing is 4 or more 2. The antistatic sweat-absorbent antifouling fabric with improved washing durability according to claim 1, wherein the hydrogel is a hydrogel substantially free of a water-absorbing polymer. 3. The antistatic with improved washing durability according to claim 1 or 2, wherein the hydrogel is a polymer having a volume swelling ratio with water of 500% or more after being immersed in water at 20 ° C. for 24 hours. Sweat-absorbent antifouling fabric. 4. The antistatic sweat-absorbent antifouling cloth with improved washing durability according to claim 1 or 2, wherein the hydrogel is a polymer formed from a polyethylene glycol group-containing polycationic compound and diglycidyl ether. . 5. The antistatic with improved washing durability according to claim 1 or 2, wherein the hydrogel is a polymer formed from a polyethylene glycol group-containing polycationic compound and monoglycidyl ether and diglycidyl ether. Sweat-absorbent antifouling fabric. 6. An antistatic with improved washing durability according to claim 1, wherein the water-absorbent polymer that does not swell with water is a polymer formed from polyethylene terephthalate and polyethylene glycol. Sweat-absorbent antifouling fabric. 7. The antistatic and sweat-absorbent antifouling with improved washing durability according to any one of claims 1 to 6, wherein the polyester fiber is a hollow polyester fiber in which communication holes from the fiber surface to the hollow portion are scattered. Cloth.