JPH11181676A - Hygroscopic textile structural product and its production - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain the subject product simultaneously bearing excellent hygroscopicity, durability and color fastness by providing an acidic group-contg. polyester-based textile structural product with a carboxylic acid salt-type amphoteric compound alogn with carrying out dyeing. SOLUTION: This hygroscopic textile structural product is obtained by immersion treatment at 80-130 deg.C of a textile structural product such as yarns or a fabric comprising acidic group-contg. polyester fiber such as polyethylene terephthalate copolymerized with 1.5-7 (pref. 2-5) mol.% of 5-sodium sulfoisophthalate and/or 5-potassium sulfoisophthalate in a treatment liquid containing a dye and a carboxylic acid salt-type amphoteric compound such as lauryl dimethylbetaine or coconut oil fatty acid amidopropylbetaine to effect applying the amphoteric compound at 0.1-5 wt.% to the textile structural product.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hygroscopic fiber structure having excellent hygroscopicity, durability and color fastness at the same time, and a method for producing the same, and more particularly, to innerwear, middle garments, sports clothing and the like. The present invention relates to a hygroscopic fiber structure suitable as a material for clothing and a method for producing the same.

[0002]

2. Description of the Related Art Thermoplastic synthetic fibers represented by polyesters and polyamides are widely used in various apparel applications and industrial applications because of their excellent mechanical strength, chemical resistance and heat resistance. However, since these thermoplastic synthetic fibers generally have low hygroscopicity, when they come into direct contact with the skin of the human body, such as innerwear, inner garments, and sports clothing, or are worn in a state close to the skin, sweating from the skin causes stuffiness and stickiness. In fact, the range of application to the garment field is limited because of the tendency to occur.

As a method for improving the hygroscopicity of the above-mentioned thermoplastic synthetic fiber, for example, Japanese Patent Publication No. 60-475, Japanese Utility Model Publication No. 60-40612 and Japanese Patent Application Laid-Open No.
In Japanese Patent No. 215835 and the like, by mixing or aligning synthetic fibers with fibers having a high equilibrium moisture content (hygroscopicity),
There has been proposed a method for improving the comfort of absorbing moisture as a fabric.

[0004] However, although these conventional methods certainly improve the hygroscopic comfort of synthetic fibers, when synthetic fibers are dyed with a commonly used disperse dye, they cause staining or impair the same color. Alternatively, there is a problem in that the physical properties inherent in the synthetic fibers are lost because of the disadvantage that the color fastness is lowered. As a method of imparting hygroscopicity at the stage of producing synthetic fibers, for example, Japanese Patent Application Laid-Open No. 2-9 / 1990
No. 9612 proposes a core-sheath type composite fiber in which a hygroscopic resin having a moisture absorption of 10% or more is used as a core component and polyester is used as a sheath component. However, due to the high hygroscopicity of the core component, the sheath component is distorted due to the swelling of the core component during hot water treatment such as dyeing, so that the fiber surface has a crack called a sheath cracking phenomenon. And the hygroscopic resin of the core component flows out to the fiber surface, which is liable to cause troubles in higher-order processes.

Japanese Patent Application Laid-Open No. 52-55721 discloses that a void (hollow portion) is formed near the core component in order to cope with the swelling of the core component (hygroscopic resin) in the composite fiber. A proposed method has been proposed. However, according to this method, a significant reduction in the sheath cracking phenomenon is certainly observed in a fabric using raw silk, but on the other hand, a twisted yarn (strong twisted yarn) is used.
When subjected to the twisting process such as or false twisted yarn, the cross-sectional change due to external force due to the hollow part of the core increases, and the sheath cracking phenomenon occurs in the weight reduction process and the dyeing process,
There was a drawback that color fastness and various physical properties were easily reduced.
Therefore, there is no conventional technique which simultaneously satisfies both the hygroscopicity and the color fastness, which has been a problem in the art.

As a method for imparting hygroscopicity to a yarn, for example, Japanese Patent Application Laid-Open No. 48-79296 proposes a method of treating a yarn with a quaternary ammonium salt (cationic) having a polyalkylene group. Have been. However, the hygroscopic fiber obtained by this method has not yet been able to sufficiently satisfy the hygroscopicity and durability.

In any case, the conventionally proposed technology has not yet realized a hygroscopic fiber structure capable of simultaneously satisfying excellent hygroscopicity and durability, and further has excellent hygroscopicity and color fastness. The fact is that a hygroscopic fiber structure capable of simultaneously satisfying the three requirements of durability and durability has not yet been realized, and has been a problem in the industry.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a moisture-absorbing fiber structure which can simultaneously satisfy excellent moisture absorption and durability, and a method for producing the same. Another object of the present invention is to provide a hygroscopic fiber structure which can simultaneously satisfy the three requirements of excellent hygroscopicity, color fastness and durability, and a method for producing the same.

[0009]

According to a first aspect of the present invention, there is provided a hygroscopic fiber structure, wherein an amphoteric compound is attached to an acidic group-containing polyester fiber in an amount of 0.1 to 5% by weight. Is what you do. Further, the method for producing a hygroscopic fiber structure is characterized in that an acidic group-containing polyester fiber is treated with an amphoteric compound so that the amphoteric compound is attached in an amount of 0.1 to 5% by weight. .

According to the present invention, a cationic group of an amphoteric compound is bonded to an acidic group (anionic group) in a polyester fiber, and a large amount of, for example, an anionic hydrophilic carboxyl group is formed on the fiber surface. As a result, excellent hygroscopicity is imparted, and a hygroscopic fiber structure having excellent durability can be obtained. Further, the hygroscopic fiber structure of the present invention, which achieves the second object, is characterized in that dyeing is carried out together with attaching the amphoteric compound to the acidic group-containing polyester fiber at 0.1 to 5% by weight. It is a feature. In the method for producing a hygroscopic fiber structure, the acidic group-containing polyester fiber is treated with a treatment liquid containing an amphoteric compound and a dye so that the amphoteric compound is attached in an amount of 0.1 to 5% by weight. It is characterized by the following.

According to the present invention, by dyeing simultaneously with the treatment of the amphoteric compound, it is possible to obtain a hygroscopic fiber structure which satisfies not only excellent hygroscopicity and durability but also high dyeing fastness as described above. it can.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, the term "acidic group-containing polyester fiber" refers to a polyester resin such as polyethylene terephthalate, polypropylene terephthalate, polybutylene terephthalate, etc., which is obtained by copolymerizing an acidic group-containing compound with a polyester resin. Fiber. Examples of the acidic group-containing compound used herein include 5-sodium sulfoisophthalic acid and / or 5-potassium sulfoisophthalic acid. However, even when a compound other than the acidic group-containing compound is copolymerized, it is used. can do.

The copolymerization amount of the acidic group-containing compound with respect to the polyester resin is 1.5 to 7 mol%, especially 2 to 5 mol%.
Preferably it is in the range of mol%. In particular, a copolymer polyester resin obtained by copolymerizing a highly versatile polyethylene terephthalate with an acidic group-containing compound as a synthetic fiber for clothing is most preferably used. The acidic group-containing polyester fiber refers to a fiber containing 50% by weight or more, preferably 65% by weight or more of the polyester-based fiber, and may be used even if it is a natural fiber or a mixed product with other fibers. Can be.

The acidic group-containing polyester fiber may be in the form of a yarn or a fabric. The form of the yarn is not particularly limited, and may be any of a filament and a staple, but a filament having a small end face is preferable. Further, the fabric form may be any of a woven fabric, a knitted fabric, a nonwoven fabric and the like, and can be appropriately selected according to the purpose of use.

The amphoteric compound used in the present invention is a general term for compounds containing an anion portion and a cation portion in the molecule. Examples include amphoteric compounds such as ester type and carboxylate type. Among them, the carboxylate type is classified into an amino acid type and a betaine type, and both are preferably used, and particularly, a betaine type such as lauryl dimethyl betaine and coconut oil fatty acid amidopropyl betaine is most preferred.

In the present invention, the adhesion amount of the amphoteric compound to the acidic group-containing polyester fiber is 0.1 to 5% by weight.
And more preferably in the range of 0.5 to 3% by weight. If the amount is less than 0.1% by weight, a sufficient effect of improving the hygroscopicity cannot be obtained. 5% by weight
If it is larger, the effect of improving the hygroscopicity becomes almost saturated, and the increase in the amount leads to an increase in cost.

Examples of the method of applying the amphoteric compound to the acidic group-containing polyester fiber include a dipping method, a bad method, a spray method, and a printing method, and any of these methods can be employed. However, from the viewpoint of productivity, the immersion method is most excellent. In the case of the bad method, the spray method, and the printing method, after applying the amphoteric compound, the amphoteric compound is fixed to the acidic group-containing polyester fiber by dry heat or wet heat treatment, and unreacted substances on the fiber surface are removed by soaping. There is a need.

When the treatment is performed by the immersion method, the treatment temperature is preferably in the range of 80 to 130 ° C. In addition, as long as the purpose of absorbing moisture is not impaired, the treatment of the dye or the functional agent may be performed simultaneously. When a cationic dye is used as the dye in this case, the dye and the amphoteric compound compete for an acidic group in the fiber, so that it is desirable to use a disperse dye that does not affect the acidic group. Since the same phenomenon is observed when a functional drug is used, anionic and nonionic compounds are preferably used as the ionic compound.

The dyeing conditions may be in accordance with the usual method for dyeing polyester fibers, and after the dyeing, a reduction washing or soaping step can be incorporated if necessary.
In addition, a finishing agent can be provided as long as the moisture absorption is not impaired. In the method for producing a hygroscopic fiber structure of the present invention, the treatment using the amphoteric compound causes the cationic group of the amphoteric compound to bind to the acidic group (anionic group) in the polyester-based fiber, and the surface of the fiber to have, for example, an anionic hydrophilic compound. A large amount of the acidic carboxyl group is provided. Therefore, excellent hygroscopicity is imparted, and a hygroscopic fiber structure having excellent hygroscopic durability can be obtained. It is presumed that such an effect is obtained because free ions greatly affect the hygroscopicity of the fiber.

In the method for producing a hygroscopic fiber structure of the present invention, dyeing is carried out simultaneously with the above-described treatment of the amphoteric compound, so that the hygroscopic property satisfies high dyeing fastness as well as excellent hygroscopicity and durability. A fibrous structure can be obtained. The hygroscopicity of the hygroscopic fiber structure obtained according to the present invention is determined by using the difference in the hygroscopic rate (hygroscopic rate difference ΔMR) as a parameter when measured by the measuring method described below. Can be set to 1% or more.

The moisture absorption of the fibrous structure can be determined by measuring the weight W ₁ of the raw yarn in a tubular knitted fabric, its weight W ₁ at the time of absolute dryness, and a thermo-hygrostat in an atmosphere of 20 ° C. × 65% RH and 30 ° C. × 90% RH. (Water absorption after moisture absorption after leaving for 24 hours in (Tavai PR-2G)) W ₂₁
And then measuring the W _22, moisture absorption MR from these by the following formula
1 and MR2 are obtained respectively. Moisture absorptivity MR1 (%) = _{[(W 21 -W 1) / W} 1 ] × 100 ··· (1) moisture absorptivity MR2 (%) = _{[(W 22 -W 1) / W} 1 ] × 100 · · (2) Then, as a difference between the equations (1) and (2), the difference in the moisture absorption rate ΔMR (%) obtained from the following equation (3) is calculated as the hygroscopicity of the moisture absorbent resin used in the present invention. Of the parameter.

The difference in moisture absorption ΔMR (%) = MR2−MR1 (3) The difference in moisture absorption ΔMR is used to obtain comfort by discharging moisture in clothes when the clothes are worn to the outside air. It is a driving force, which is the temperature and humidity inside clothes represented by 30 ° C. × 90% RH and the outside air temperature represented by 20 ° C. × 65% RH when performing light to medium work or light to medium exercise. This corresponds to the difference in moisture absorption.

The greater the difference ΔMR in moisture absorption, the higher the hygroscopicity and the better the comfort when worn. In the moisture-absorbing fiber structure of the present invention, the difference ΔMR in moisture absorption can be at least 1% or more, and the comfort when worn can be improved. Since the moisture-absorbing fiber structure obtained by the present invention has excellent moisture-absorbing properties as described above, clothes formed therefrom have sufficient dry-touch moisture-absorbing properties and comfortable wearing with a feeling. Therefore, it can be made particularly suitable as a material for clothing such as innerwear, shirts / blouses, middle garments, sportswear, slacks, outer garments, linings, etc., and also a bedding material such as sheets and futon covers.

[0024]

EXAMPLES In the examples described below, washing durability and color fastness, which are durability parameters, were determined by the following methods. [Washing durability] New beads (Kao Corporation) 5 as a detergent
0 g is dissolved in 25 liters of water, and adjusted with a disposable cloth so that the amount of the sample becomes 500 g. The processing time is 15 minutes, the rinsing time is 15 minutes, and the dehydration is 2 minutes. After washing 10 times repeatedly, the difference in moisture absorption ΔMR of the dried sample was measured.

[Dyeing Fastness]
Washing fastness according to IS-L0844, JIS-L08
The rub fastness according to 49 and the light fastness according to JIS-L0842 were measured and evaluated. In addition,% in the following Examples shows weight% unless there is particular notice.

Examples 1 to 8 and Comparative Examples 1 to 6 A knitted fabric comprising an acid group-containing polyester fiber obtained by copolymerizing polyethylene terephthalate with 5 mol% of dimethyl 5-sodium sulfoisophthalate was treated as shown in Table 1. Each of the treatment agents was attached to the fibers by immersion treatment under the following treatment conditions using the agents.

[Treatment conditions] Treatment temperature (° C.): 100 Treatment time (min): 60 Bath ratio: 1: 200 For the fiber structure of each sample obtained, the difference in moisture absorption ratio ΔMR before washing and the above washing Table 1 also shows the results of measuring the difference in moisture absorption ΔMR after washing under the conditions of durability.

[0028]

[Table 1]

As is clear from the results in Table 1, the hygroscopic fiber structure of the present invention treated with the amphoteric compound (Examples 1 to 3)
No. 9) has remarkably improved hygroscopicity, has no performance deterioration even after repeated washing, and has sufficient durability. On the other hand, the fiber structures (Comparative Examples 3 to 8) treated with the fiber-affinity-type cationic compound have improved hygroscopicity as in the case of the untreated (Comparative Example 1) and the hot water treatment (Comparative Example 2). It turns out that the effect is hardly recognized.

Examples 10 to 13 and Comparative Example 9 The same knitted fabric as in Example 1 was used, except that an amphoteric compound and a dye were used in combination under the following processing conditions.
Alternatively, the immersion treatment is carried out under the same conditions as in Example 4 so that the respective treatment chemicals are adhered in the amounts shown in Table 1 and then reduced and washed by a conventional method (80 ° C.) to obtain a hygroscopic fiber structure. Table 2 shows the results of evaluation of the moisture absorption ΔMR and washing durability of
And Table 3 shows the results of evaluation of the color fastness.

As Comparative Example 9, the evaluation results of the hygroscopic fiber structure when treated with a treatment solution containing only the dye are shown in Tables 2 and 3. [Treatment conditions] Dye: Samron Blue GSL-400 (Disperse dye manufactured by Dystar Co., Ltd.): 0.5 owf% Amphoteric compound: A: Lauryl dimethyl betaine B: Palm oil fatty acid amidopropyl betaine Dyeing temperature (° C.): 100 Dyeing time (min) ): 60 Bath ratio: 1: 200

[0032]

[Table 2]

[0033]

[Table 3]

As is evident from the results in Table 2, the moisture-absorbing fiber structure of the present invention shows a decrease in washing fastness, friction fastness, and light fastness even when the amphoteric compound and the dye are used in combination. It can be seen that excellent hygroscopicity is exhibited without causing the occurrence of moisture.

Further, as is apparent from the results in Table 3, the hygroscopic fiber structure of the present invention has sufficient dyeing fastness which is not much different from the result of Comparative Example 9.

[0036]

As described above, according to the present invention, a large amount of a hydrophilic group is imparted to the surface of a fibrous structure by an amphoteric compound, so that a hygroscopic fiber structure having excellent hygroscopicity and durability at the same time. When dyeing is carried out together with the amphoteric compound, a hygroscopic fiber structure having excellent hygroscopicity, durability and high color fastness at the same time can be obtained.

Claims (9)

[Claims] 1. A hygroscopic fiber structure in which an amphoteric compound is attached to an acidic group-containing polyester fiber in an amount of 0.1 to 5% by weight. 2. A hygroscopic fiber structure which is dyed while adhering 0.1 to 5% by weight of an amphoteric compound to an acidic group-containing polyester fiber. 3. The hygroscopic fiber according to claim 1, wherein the acidic group of the acidic group-containing polyester fiber is a group derived from 5-sodium sulfoisophthalic acid and / or 5-potassium sulfoisophthalic acid. Structure. 4. The hygroscopic fiber structure according to claim 1, wherein the amphoteric compound is of a carboxylate type. 5. A method for producing a hygroscopic fiber structure, comprising treating an acidic group-containing polyester fiber with an amphoteric compound and allowing the amphoteric compound to adhere in an amount of 0.1 to 5% by weight. 6. A method for producing a hygroscopic fiber structure, wherein an acidic group-containing polyester fiber is treated with a treating solution containing an amphoteric compound and a dye so that the amphoteric compound is attached in an amount of 0.1 to 5% by weight. . 7. The immersion treatment according to claim 5, wherein the treatment is immersion treatment.
Or the manufacturing method of the hygroscopic fiber structure of Claim 6. 8. The moisture absorption according to claim 5, wherein the acidic group of the acidic group-containing polyester fiber is a group derived from 5-sodium sulfoisophthalic acid and / or 5-potassium sulfoisophthalic acid. A method for producing a conductive fiber structure. 9. The method for producing a hygroscopic fiber structure according to claim 5, wherein the amphoteric compound is of a carboxylate type.