JPH10130960A - Composite fiber having comfort function and comfort garment - Google Patents

Abstract

(57) [Problem] To provide a conjugate fiber having a comfort function having a high color developing property, a high clarity and an excellent hygroscopic property while having a texture of nylon, and a comfort comprising the same. They do not provide clothing. The conjugate fiber having a comfort function of the present invention comprises:
A core-sheath type conjugate fiber composed of a core portion made of a sulfonated dicarboxylic acid-modified polyester and a sheath portion made of polyamide, and having an equilibrium moisture content at 30 ° C. × 90% RH and a temperature of 20 ° C. × 65. The difference in equilibrium moisture content at% RH is 2% or more, and the comfort garment of the present invention is characterized by being composed of a conjugate fiber having such a comfort function. It is assumed that.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a conjugate fiber having a comfort function that simultaneously satisfies both high moisture absorption and high color development.

[0002]

2. Description of the Related Art Hitherto, polyamide fibers represented by nylon 6 and nylon 66 have been used for applications that take advantage of their excellent strength, abrasion resistance and supple texture. In particular, the product is being developed for sportswear, sports equipment, and winter clothing. However, the diversification of fashion has progressed, and the functionality of the original clothes has not been satisfied.
It is an era where individualization of patterns and designs is preferred. The greatest advantage of polyamide fibers is that they can be dyed deeply with an acid dye, and can be dyed in a vivid color. However, they have poor light fastness and are not suitable for outer garments. Considering fashionability, combinations of shades of color, patterning by printing, weaving, and knitting have been employed to change the hue.
However, dyed products of polyamide fibers are liable to have poor light fastness and washing fastness, and improvements have been desired. In order to improve these problems, Japanese Patent Publication No. 8-26486 proposes a composite fiber in which a core component sulfonated dicarboxylic acid-modified polyester is substantially dyed with a cationic dye.
It has less hygroscopicity than a conventional fabric made of polyamide fiber, and is not suitable for sports clothing and the like. Japanese Patent Publication No. Sho 60-34979 proposes a method of modifying polyamide, which is presumed to impart hygroscopicity, by graft polymerization with an acidic vinyl monomer having a carboxyl group. The decrease in color fastness due to the quality was large. In particular, in sports clothing and the like, in fact, it is desired to impart not only fashionability but also hygroscopicity as comfort clothing.

[0003]

DISCLOSURE OF THE INVENTION The present invention relates to a conjugate fiber having a comfort function of having a high color-forming property, being rich in clarity and having excellent hygroscopicity while having a texture of nylon, and a comfort comprising the same. They do not provide clothing.

[0004]

The present invention employs the following means to solve the above-mentioned problems. That is, the conjugate fiber having a comfort function of the present invention is a core-sheath type conjugate fiber composed of a core portion made of sulfonated dicarboxylic acid-modified polyester and a sheath portion made of polyamide, and has a temperature of 30 ° C. Equilibrium moisture content at 90% RH and 20 ° C x 6
The difference in the equilibrium moisture content at 5% RH is 2% or more, and the comfort garment of the present invention is composed of a conjugate fiber having such a comfort function. It is a feature.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION The present invention relates to a fiber having the above-mentioned object, that is, a fiber having a texture of nylon, a high color developing property, a high clarity, and a comfort function excellent in moisture absorption. As a result of intensive studies, it has been found that such a problem can be solved at once by using a core-sheath type composite fiber in which a specific sulfonated dicarboxylic acid-modified polyester is used as a core portion and a sheath portion is made of a polyamide having high hygroscopicity. Is what we can do.

That is, a core-sheath type composite fiber comprising a core made of sulfonated dicarboxylic acid-modified polyester and 20 to 40% by weight of a sheath part of polyamide having high hygroscopicity and having a hygroscopicity of 60 to 80% by weight is formed. When dyed with, the sheath is not dyed but only the core is colored, and it is possible to provide a fiber having excellent light fastness, high coloring and excellent clarity. Further, the non-colored sheath portion can be imparted with a characteristic of being able to provide an iridescent colored material by subsequently dyeing it with an acidic dye in a light color. Regardless of the color of the core portion and the color of the sheath portion, the same color or different colors can produce an excellent deep color tone or a different color.

The conjugate fiber of the present invention is suitable for apparel such as sportswear, has a vivid hue, has high moisture absorption, and has practicality such as light fastness and washing fastness. An excellent garment that has both functions of the form and the dyed surface of the fiber, that is, it has sharpness, deep color, and a deeper sheath with the polyamide sheath that forms the outside of the fiber. The present invention has succeeded in providing a highly hygroscopic conjugate fiber having a certain hue or iridescent discoloration.

The polymer constituting the composite fiber of the present invention is limited to a sulfonated dicarboxylic acid-modified polyester whose core can be dyed with a cationic dye. A compound having a sulfone group is a polyester contained in a part of a chain or a terminal of the polyester, for example, a polyester obtained by copolymerizing a sulfonated aromatic dicarboxylic acid or a salt thereof with polyethylene terephthalate, polybutylene rephthalate, polyethylene isophthalate, or the like. is there. A typical example of the sulfonated aromatic dicarboxylic acid is 5-sulfoxyisophthalic acid or a salt thereof. These dicarboxylic acids are added and polymerized in a free acid state or an alkyl ester state at the time of polymerization of the polyester to form a modified polyester. The copolymerization amount of this sulfonated aromatic dicarboxylic acid is 0.1 to terephthalic acid.
It is about 5 to 6 mol%. Preferably 1.5 to 4 mol%
It is. When the copolymerization amount is less than 0.5 mol%, the number of sulfone groups is small and no deep color is obtained. Conversely, if it is too large, the crystal structure of the modified polyester is disturbed, resulting in poor spinning properties. The ratio of the core is preferably 20 to 40% by weight. When the amount is less than 20% by weight, the amount of dyeing on the core becomes small and the color is not dark. On the other hand, if it exceeds 40% by weight, the sheath portion becomes thin and may cause sheath cracking. The sheath portion made of polyamide becomes 80% by weight when the core portion is 20% by weight, and becomes 60% by weight when the core portion is 40% by weight. The content of the core is preferably 25 to 35% by weight, more preferably close to 30% by weight, from the viewpoints of both the shape retention of the sheath and the color development.

From another viewpoint, that is, from the viewpoint of hue density and vividness, the thickness of the sheath portion of the core-sheath type composite fiber is preferably at least 1/10 of the fiber diameter, more preferably, It is good to be in the range of 2/10 to 4/10.

The core-sheath type conjugate fiber of the present invention is obtained by dyeing the modified polyester of the core with a cationic dye to make it the basic color. That is, the inside polymer coated with polyamide is dyed with a cationic dye having a vivid color and high color development, and this is protected by the polyamide at the sheath, so that it is excellent in light fastness and washing fastness. In addition, since the ratio of polyamide is high, and the exterior is constituted, the goodness of polyamide fiber can be maintained on the surface.

In such a composite fiber, the arrangement of the core of the modified polyester and the sheath of the polyamide is preferably basically concentric, but it is eccentric or multi-core unless the sheath is too thin to break. Is also good. If the modified polyester can be covered with polyamide, it can be used as a deformed yarn. In the spinning, the modified polyester and the polyamide are separately melted, guided to a spin pack, formed into a composite stream by a usual method so as to form a core-sheath structure, and spun from a nozzle. The spun filament yarn is taken up and refueled at a predetermined speed, and then wound up into a package. Next, the yarn once wound up to obtain the desired strength and elongation is drawn by a draw twister as usual.

It is important that the sheath of the core-in-sheath type composite fiber of the present invention is made of a hygroscopic polyamide, and is made of a polymer represented by nylon 6 or nylon 66. Nylon 66 having a high melting point and excellent heat resistance is preferred. Further, a clean polymer to which titanium oxide, antimony trioxide or the like is not added is more preferable since it has a function of preventing the hue of the core from being alienated. The above-mentioned hygroscopic polyamide means that a polymer is provided with polyvinylpyrrolidone, for example, an N-vinyl-2-pyrrolidone polymer (hereinafter, referred to as polyvinylpyrrolidone) as a water-absorbing component in a polymer to impart hygroscopicity. it can. In addition, for example, in order to impart hygroscopicity to the polyamide of the sheath by modifying the polyamide which is the sheath of the core-in-sheath type composite fiber, moisture absorption is performed by a method such as graft polymerization of a mixture of acrylic acid and methacrylic acid. It is also possible to impart properties.

The garment of the present invention is a measure of comfort assuming that the garment is worn. The equilibrium moisture content in a high-temperature and high-humidity environment (30 ° C. × 90% RH), that is, an atmosphere assuming light exercise, and a standard condition (20 ° C. × It is important that the difference in the equilibrium moisture content at 20 ° C. × 65% RH (referred to as ΔMR) is 2% or more.
If it is less than 2%, comfort cannot be obtained without much difference from conventional polyamides. It is preferably at least 3%, more preferably at least 4%, which has a moisture absorption property comparable to cotton. Here, the equilibrium moisture content is measured according to the general textile test method of JIS L-1096.

The equilibrium moisture content at 30 ° C. × 90% RH and 20
A fabric made of a highly hygroscopic conjugate fiber having a difference in equilibrium moisture content of 2% or more at 65 ° C. × 65% RH has comfortable performance and high color development due to high hygroscopicity, and excellent fashion. Suitable for comfort clothing, especially sports clothing, because it has a quick drying property that cotton and wool do not have even when wet, so it feels as if it has high moisture absorption and desorption properties. It is.

The object of the present invention is achieved only by dyeing the core portion of the fabric comprising the core-sheath type conjugate fiber with a cationic dye, but the sheath portion has a lighter hue than that of the core portion and has an acidic dye. By dyeing with, a novel iridescent colored material can be provided. Such colored conjugate fibers are
The color of the core and the sheath is delicately absorbed and reflected by a light beam having an angle from the outside, so that a garment exhibiting a unique hue can be provided.

[0016]

The present invention will be described in more detail with reference to the following examples. The hygroscopicity was evaluated by the aforementioned ΔMR, the washing fastness was evaluated according to JIS-L 0844, and the light fastness was evaluated according to JIS L-0842. Hue was relatively compared based on the sharpness of the product of the present invention.

Example 1, Comparative Examples 1-3 A catalyst and 5-sulfoxyisophthalic acid were added to a raw material of polyethylene terephthalate consisting of ethylene glycol and terephthalic acid in a conventional manner, and polymerized by adding 1.5 mol% to terephthalic acid. Phenol intrinsic viscosity (I
V) was 0.64 to obtain a sulfonated aromatic dicarboxylic acid-modified poly (ethylene terephthalate). The modified polyester and nylon 66 (intrinsic viscosity: 2.32) containing 7% by weight of polyvinylpyrrolidone were subjected to an extruder-type composite spinning machine, and each was melted separately. A composite stream is formed and discharged so as to take off at a rate of 1500 m / min m / min.
It was heat-set with a drawing roller (160 ° C.) and wound up at 4000 m / min to obtain a 70 denier 24-filament drawn yarn. The drawn yarn was used as a warp and a weft, and a plain fabric was woven. This plain woven fabric is desizing and scouring in the spread state, heat-treated at 180 ° C, and 110 ° C with cationic dye Catilon Blue BL-DP 3% owf.
Stained for 40 minutes. After staining, soaping was carried out with 0.5 g / L of Laccol PSK (manufactured by Meisei Chemical Co., Ltd.) and 0.2 g / L of acetic acid at 60 ° C. for 20 minutes, followed by washing and drying.

As a comparative example, in the same manner as in Example 1, a plain woven fabric made of a core-sheath composite yarn having a sheath component of nylon 66 containing no polyvinylpyrrolidone was woven and dyed.

Further, for comparison, a 100% polyester product having the same yarn structure [Comparative Example 2] and a 100% nylon product [Comparative Example 3] were prepared using a disperse dye and an acid dye, respectively, as in Example 1.
And dyed in the same color system as above, and evaluated for hygroscopicity, color fastness and hue. The dyed product of the present invention has high hygroscopicity and excellent color fastness, and it has been confirmed that the dyed product has sharpness not found in polyester. Comparative Example 1 using nylon containing no polyvinylpyrrolidone showed a high color fastness. Although there was no problem with hue, it did not become a comfortable garment due to poor hygroscopicity. polyester
A 100% product has almost no hygroscopicity, not only does not provide a clear hue, but also lacks flexibility and is not suitable for use in sports clothing and casual clothing. The 100% nylon product was in accord with conventional knowledge, such as insufficient hygroscopicity and a large decrease in color fastness.

[0020]

[Table 1] Example 2 A woven fabric was trial-produced and dyed in the same manner as in Example 1 except for a sheath component made of polyamide having a different content of polyvinylpyrrolidone.

As a result of evaluating the hygroscopicity (ΔMR) of the obtained woven fabric, as shown in Table 2, when the amount of polyvinylpyrrolidone contained in the polyamide was less than 4%, sufficient hygroscopicity was not obtained, and the hygroscopicity (ΔMR) was not obtained. ) Less than 2% could not be comfortable clothing.

On the other hand, if the amount of polyvinylpyrrolidone contained in the polyamide is 15% or more, there is a problem in yarn production, uniform yarn cannot be obtained, and the product cannot be used as clothing.

[0023]

[Table 2] Example 3 A fabric obtained by mixing acrylic acid and methacrylic acid at a ratio of 1: 2 to the same woven fabric as in Comparative Example 2 was treated in a bath at 80 ° C. for 30 minutes together with ammonium persulfate as a catalyst. A woven fabric comprising the core-sheath composite fiber was obtained.
The woven fabric is desizing and scouring in a spread state, heat-treated at 180 ° C, and then dried with a cationic dye Catilon Blue BL-DP 3% owf for 110%.
Staining was performed at 40 ° C. for 40 minutes. After staining, soaping was carried out with 0.5 g / L of Laccol PSK (manufactured by Meisei Chemical Co., Ltd.) and 0.2 g / L of acetic acid at 60 ° C. for 20 minutes, followed by washing and drying. Since the polyester of the core component was dyed with a cationic dye, and the polyamide of the sheath component was not dyed, a woven fabric having good color fastness and high moisture absorption was obtained. Table 3 shows the properties of the woven fabric without graft polymerization of acrylic acid / methacrylic acid as Example 2 and Comparative Example 3 of the present invention.

[0024]

[Table 3] Example 4 Wearing sportswear of a knitted fabric composed of the fiber of Example 1 and the fibers of Comparative Examples 2 and 3, respectively, and walking for 10 minutes at a speed of 100 m / min under the same environment (weather: fine, temperature: 30 ° C). As a result, the wear of Example 1 absorbed sweat and did not feel discomfort, but Comparative Examples 1 and 2 were sticky and frustrating. In Comparative Example 3, the comfort at the start of walking was good, but stickiness appeared after 6 minutes.

[0025]

According to the present invention, it is possible to provide an excellent comfort garment, particularly a sports garment or underwear which requires fashionability, and also provides a garment having a good color fastness as a colored product. can do.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁶ Identification code FI D06P 3/87 D06P 3/87 A

Claims (14)

[Claims] 1. A core-sheath type conjugate fiber comprising a core made of a sulfonated dicarboxylic acid-modified polyester and a sheath made of polyamide, and having a temperature of 30 ° C. × 90% R
A composite fiber having a comfort function, wherein the difference between the equilibrium moisture content at H and the equilibrium moisture content at 20 ° C. × 65% RH is 2% or more. 2. The conjugate fiber having a comfort function according to claim 1, wherein the sulfonated dicarboxylic acid is a sulfonated aromatic dicarboxylic acid. 3. The conjugate fiber having a comfort function according to claim 1, wherein the modified polyester is obtained by copolymerizing the sulfonated dicarboxylic acid with 0.5 to 6 mol% with respect to terephthalic acid. 4. The conjugate fiber having a comfort function according to claim 3, wherein the copolymerization amount of the sulfonated dicarboxylic acid to terephthalic acid is 1.5 to 4 mol%. 5. The conjugate fiber having a comfort function according to claim 1, wherein the sheath is a polyvinylpyrrolidone-containing polyamide. 6. The conjugate fiber having a comfort function according to claim 4, wherein the polyamide contains at least 3% by weight of polyvinylpyrrolidone. 7. The content of the polyvinylpyrrolidone is 4
The conjugate fiber having a comfort function according to claim 6, wherein the amount is 8 to 8% by weight. 8. The conjugate fiber having a comfort function according to claim 1, wherein the polyamide is obtained by graft-polymerizing an acidic vinyl polymer having a carboxyl group. 9. The core-in-sheath type conjugate fiber contains 20 to 40% by weight.
2. The conjugate fiber having a comfort function according to claim 1, wherein said conjugate fiber is composed of said core portion and 60 to 80% by weight of said sheath portion. 10. The film thickness of the sheath portion of the core-sheath type conjugate fiber,
The conjugate fiber having a comfort function according to claim 1, wherein the conjugate fiber has at least 1/10 of the fiber diameter. 11. The conjugate fiber having a comfort function according to claim 1, wherein the core is colored with a cationic dye. 12. The comfort function according to claim 1, wherein the sheath is colored lightly with an acid dye. 13. A comfort garment comprising the conjugate fiber having a comfort function according to claim 1. Description: 14. The comfort garment according to claim 13, wherein the comfort garment is a sports garment.