WO2005075722A1

WO2005075722A1 - Air-jet interlacing spun yarn and woven fabric including the same

Info

Publication number: WO2005075722A1
Application number: PCT/JP2005/000889
Authority: WO
Inventors: Kazushi Sueki
Original assignee: Toyo Boseki Kabushiki Kaisha
Priority date: 2004-02-06
Filing date: 2005-01-25
Publication date: 2005-08-18
Also published as: CN1914363A; JP4461365B2; JP2005220478A; KR20060129380A

Abstract

[PROBLEMS] To provide a spun yarn or a woven fabric which is reduced in the see-through feeling even when it is a thin undyed cloth, exhibits high UV-cut, is excellent in the rapid drying property for absorbed water and in the coloring property, and is rich in the anti-pilling property and has a soft feeling without the use of a modified polyester fiber, and can be produced at a low cost. [MEANS FOR SOLVING PROBLEMS] An air-jet interlacing spun yarn containing a highly profile polyester fiber having a profile degree (the ratio of a circumscribed circle to an inscribed circle) of the fiber cross section of 1.8 or more or a hollow polyester fiber having a hollow proportion of 8 % or more, wherein the polyester fiber has a fineness of 3.5 dtex or less and said spun yarn has a number of fluffs per 10 m of the yarn length of not less than 30 and less than 350 pieces with respect to the fluff having a length of 1 mm or longer, and of less than 15 pieces with respect to the one having a length of 3 mm or longer; and a woven fabric which comprises the above air-jet interlacing spun yarn, exhibits a pilling of three grade or higher, a UV-cut of 84 % or more and a transmittance for visible light rays of 40 % or less.

Description

Specification

Air entangled spun yarn and fabric containing the same

Technical field

The present invention relates to an air-entangled spun yarn and a polyester fiber-containing fabric capable of exhibiting an ultraviolet shielding effect, a see-through preventing property, and an anti-pill property by a different mechanism from the past. Further, the present invention relates to an air-entangled spun yarn and polyester short fiber-containing fabric which can exhibit anti-pill properties without using a modified polyester and have excellent water-absorbing and quick-drying properties. Applications include clothing, hats, umbrellas, scarves, towels, gloves, curtains, pillowcases, cushions such as shoes, blouses, casual knits, golf knits, sweaters, jackets, pants, skirts, swimwear, underwear, uniforms, etc. It is suitable for side lands, sheets, futon side lands, diapers and the like. Background art

[0002] Conventionally, as a method for obtaining a polyester fiber cloth exhibiting a see-through preventing effect and an ultraviolet ray shielding effect, a method using a polyester fiber in which titanium oxide or the like is kneaded inside the fiber, a method of including an ultraviolet absorber on the surface of the cloth And a high-density weaving method. In particular, so-called Fuldal fibers, which contain a large amount of titanium oxide inside the fibers, are widely used for clothing and the like, which have high sheer prevention and ultraviolet shielding effects (for example, see Patent Document 1). However, in general, a full-dull yarn having a titanium oxide content of 3.0% by mass or more causes severe wear of guides, yarn paths, pruri, and the like, induces fluffing and yarn breakage, and reduces the process passability. There is a limit in color development, and there is a significant restriction on the vivid color expression obtained with ordinary polyester fibers. In order to prevent these drawbacks, there has been proposed a method in which a fiber containing a large amount of titanium oxide is used as a core and a composite fiber is usually formed with a sheath as a fiber. However, the method becomes expensive and the quality is unstable. The method of imparting an ultraviolet absorber by post-processing has the disadvantage of hardening the hand and increasing the cost.

Patent Document 1: JP-A-5-148734

[0003] On the other hand, as a polyester fiber that claims to absorb water and dry quickly, there has been proposed a conventional round cross-section made of ultrafine fibers, or a long fiber having an irregular cross-section such as L-type, W-type, or Y-type. These increase the fiber surface area, reduce the gap between fibers, enhance the capillary effect, and excel in water absorption quick drying. Therefore, it is light in use and is often used in sports applications that make use of the glossiness. Hollow fibers are generally used as lightweight heat-insulating materials in polyester staple fibers.The irregular reflection effect on the fiber surface is weak, and it is not possible to expect the ultraviolet absorption effect and visible light transmittance of the products of the present invention. is there.

[0004] As anti-pilling (anti-pill) polyester fibers, organic sulfonic acid-based copolymerized polyester fibers and modified polyester fibers containing phosphorus and the like are mainly used. These reduce the fiber strength in the resin, spinning and drawing steps, and further promote the reduction in fiber strength (knot strength) in the dyeing and finishing process conditions, making it easier for fluff on the fabric surface to fall off. And rayon blended yarn fabrics. However, such a modified polyester fiber, particularly an organic sulfonic acid-based copolymerized polyester fiber, has poor spinning performance, even in the case of a general round cross-section fiber form, in which metal salts are easily precipitated during spinning. . The spinning of irregular cross section fibers is even more difficult. In addition, there is a drawback that spinnability is poor due to low fiber strength.

In order to improve the spinnability, it is necessary to increase the fiber strength. In order to obtain the anti-pill property, it is necessary to devise the fiber strength in the dyeing process. In addition, there are difficulties such as complicated processing management to maintain a certain quality during dyeing.

[0005] In the dyeing processing of such a modified polyester fiber, when the treatment liquid is used on the strong acid side such as pH 3-4, it is difficult to minimize the change in the pH of the liquid during the treatment and the difference between batches. Yes, if the control is insufficient, brittleness and discoloration of the dough are easily caused, leading to a drop in the strength and quality of the practical dough, which significantly impairs the product value. In addition, it is disadvantageous in terms of cost for a fabric having a fiber structure that requires a long dyeing time at a high temperature to obtain anti-pill property. In addition, fabrics made of such modified polyester fibers are extremely uneconomical because they cannot be re-dyed because the strength of the yarn or fabric is greatly reduced by dyeing and raising.

[0006] In recent years, improvement of the anti-pill property by a spinning method has been studied, and there is a method using binding spinning. In this method, the entanglement between fibers by high-speed air fluid is the basic structure, and the fiber ends are constrained inside the fiber, which improves the anti-pill property with less fluff.However, this method is more effective than ring spun yarn. There is a drawback that the hand becomes hard due to the structure. Polyester short In textile fabrics, there is a demand for a fabric that has both anti-pill properties, ultraviolet shielding properties, anti-seepage properties, coloring properties, water-absorbing quick-drying properties, and a refreshing feeling without using full-dal fibers, and has a soft feeling.

Disclosure of the invention

Problems to be solved by the invention

[0007] The present invention has a low translucent feeling and a high UV shielding rate even in a thin white fabric that does not use a Fuldal fiber (generally having a titanium oxide content of 3.0% by mass or more) or an ultraviolet absorber. An object of the present invention is to obtain a soft-textured spun yarn and fabric which are excellent in water absorption quick-drying property and color-forming property, and have a high anti-pill property without using a modified polyester fiber at a low cost.

Means for solving the problem

That is, the present invention has the following constitution.

1. Titanium oxide content is less than 1.0% by mass. It has three or more protrusions on the circumference of the fiber continuously in the fiber length direction. Air-entangled spun yarn containing high irregularity polyester fiber with a ratio of circle of 1.8 or more and / or hollow polyester fiber with a hollow ratio of 8% or more, and the fineness of the polyester fiber is 3.5 dte X or less. An air-entangled spun yarn in which the number of fluffs per 10 m of the spun yarn is 30 or more and less than 350 in lmm or more and less than 15 in length of 3 mm or more.

2.Contains at least a portion of the air-entangled spun yarn described in 1 above, and has a pilling grade of 3 or higher in JIS L-1076 (1992) A method, an ultraviolet shielding factor of 84% or more, and visible light. A polyester fiber-containing fabric having a transmittance of 40% or less.

The invention's effect

According to the present invention, it is possible to use a modified polyester fiber, which has a low sheer feeling and a high ultraviolet ray shielding rate, is excellent in water-absorbing quick-drying properties and color-forming properties, and has a high degree of ultraviolet light shielding even in the case of a thin white fabric that does not use full-dal fibers. An air-entangled spun yarn and a polyester fiber-containing fabric having a soft feel and simultaneously having excellent pill resistance can be obtained at low cost.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the air-entangled spun yarn containing polyester fiber and the fabric containing the same according to the present invention will be described in detail.

The content of titanium oxide contained in the polyester fiber used in the present invention is less than 1.0% by mass. In the case of a fiber having a high degree of irregularity cross section in which three or more protrusions present on the fiber circumference are continuous in the fiber length direction and the degree of irregularity is 1.8 or more, preferably 0.6. % By mass, more preferably 0.5% by mass or less. If the content exceeds 1.0% by mass, the spinnability deteriorates, and the effect of delustering acts strongly, so that the whiteness is inferior and the coloring property tends to be lost. The present invention is characterized in that it does not need to be contained more than necessary because a small amount of titanium oxide can provide an ultraviolet ray shielding property and a see-through prevention property similar to that of the full-dal fiber.

[0011] In the case of hollow fibers, the surface reflectivity of light tends to be inferior to that of the above-mentioned fibers having a high degree of irregularity, and a slightly higher content of titanium oxide is more effective. It is preferably about 8% by mass. The titanium oxide content improves the light reflectance when there are multiple hollow shapes in the fiber

Therefore, it is possible to reduce the number of cases, and to improve the color development.

[0012] In the present invention, the power that titanium oxide is mainly used, the power that has been conventionally used, a small amount of radioactive fine powder obtained from orinite, zirconium carbide, various pigments, tourmaline, rare ore, deep sea water, etc. Antibacterial deodorants, bacteriostats, etc. may be mixed as necessary.

[0013] The fiber used in the present invention whose fiber cross section has a high degree of irregularity has three or more protrusions on the fiber circumference, and the degree of irregularity (expansion of the fiber cross section with an electron microscope or an optical microscope) It is preferable that the projection is continuously formed in the fiber length direction when the circumscribed circle and the inscribed circle are drawn and expressed by the ratio of their diameters).

A round cross section, a flat cross section, or a triangular cross-section with a fiber surface reflectance of less than 1.8 is less preferable than a irregular cross-section with a degree of irregularity of less than 1.8. It is preferably a Y-shaped, cross-shaped, or star-shaped cross-section fiber having a high rate. The degree of heterogeneity is preferably 2.0 or more and less than 3.5, and more preferably 3.0 or less. 3. In 5 or more Fiber strength tends to decrease. Such a fiber having a high degree of irregularity is generally bulky, and has an effect of giving a soft cushioning effect to the fabric. Therefore, the air-entangled spun yarn of the present invention effectively acts on soft feeling.

[0014] The hollow fiber used in the present invention preferably has a hollow ratio of 8% or more and 45% or less. If it is less than 7%, the light reflectance is poor, and if it is more than 46%, the shape retention is difficult, which is not preferable. Preferably it is in the range of 15% to 30%. The hollow cross-sectional shape of the fiber may be round, triangular, flat, square, or the like. The number of hollow fibers in a single fiber may be one or more. The hollow fiber may be hollow during spinning, and may be a hollow fiber obtained by dissolving and removing a specific component from cotton, yarn, or fabric.

[0015] The content of the highly irregular fiber and / or hollow fiber in the air-entangled spun yarn is preferably 30%, more preferably 50. / o or more. These can be used alone or in combination. In addition, other fibers such as cotton, rayon, cuvula, polynosic, cellulosic fibers such as purified cellulose (such as Tencel) (including hygroscopic heat-generating fibers), deodorant, and antibacterial It may be mixed with polyester, acrylic, acrylate, modacrylic fiber or the like having deodorant performance and the like.

The present invention is characterized in that a homopolymer polyester such as polyethylene terephthalate can be used to obtain anti-pill properties. A cationic polymer which is a copolymer of this polyester fiber and an organic sulfonic acid metal base-containing component is used. It can be mixed with dyed polyester type polyester fiber, etc. in cross-weaving, cross-knitting, blending, etc. for the purpose of obtaining a clear color or a different color dyeing effect. In the present invention, the content of the fiber having a high degree of irregularity or hollow fiber in the fabric is preferably 20%, more preferably 40% or more.

[0017] The fineness of the polyester fiber in the present invention is preferably 3.5 dtex or less, more preferably 2.5 dtex or less, from the viewpoint of entanglement, hand and count. 3. If the dtex is 6 dtex or more, the number of spun yarns is reduced, and the rigidity is high. As a result, the entanglement is poor, the hard feeling and the strength are reduced, and it is difficult to obtain a fine count. Compared to long fibers, short fibers are expected to prevent light transmission due to their bulkiness due to crimping.Furthermore, by adopting a high degree of irregularity of 1.8 or more and a hollow cross-sectional shape, the rigidity of the fibers increases, and spun yarns Has the property of being bulky. As a result, round or flat sections with less sag of fibers due to heat or physical force in the post-process, irregularity less than 1.8 Compared to the above-mentioned fibers, it is excellent in bulky fiber form retention, and advantageously acts to prevent the passage of ultraviolet light and visible light.

[0018] From the strength of the rigidity due to the cross-sectional shape of the polyester fiber in the present invention, the fineness is 1.1 to 1.5 dtex, but the round cross-section fiber 2. Sufficient rigidity (No, Ri, waist) comparable to Odtex is obtained. As a result, the number of spun yarns can be increased at the same count as that of conventional yarns, and as a result

It is possible to increase the strength and the effect of preventing the fiber from reflecting ultraviolet light and transmitting visible light. In addition, there is also an effect of weakening the entanglement between fluffs due to its rigidity and improving anti-pill property.

[0019] In the polyester short fiber of the present invention, an appropriate number of crimps is 820 / 25mm, and as the number of crimps increases, bulkiness and irregular reflection on the fabric surface increase, and preferably 10 or more Z25mm or more. . The fiber cut length can be from 32mm to vari-cut, and it is selected appropriately according to the purpose. In general, the preferred range is from 32 mm to 51 mm, which is preferably the length of the spun yarn, the degree of fluff entanglement, the feeling, and the surface quality of the spun yarn.

When spinning the above-described polyester short fiber, a high-speed air fluid entangled yarn such as an open end or a bundle spinning is used without using the ring spinning method. These systems are different from ring spun yarns in that they have a structure in which force-hardening, which has the effect of suppressing yarn fluff in a yarn structure, is inevitable. Therefore, in the present invention, the spinning conditions are: It is desirable to set conditions that do not impair bulkiness and pill resistance, and to avoid low-speed spinning speed under high air pressure that increases the degree of entanglement and hardens the feeling.

[0021] The number of fluffs of spun yarn spun in the present invention is such that the number of fluffs having a length of lmm or more per 10m of yarn length is 30 or more, less than 350, and the number of fluffs having a length of 3mm or more is less than 15 It is preferable that the number of fluffs is less than 300 and less than 10 at the same time. By specifying the fiber cross-sectional shape and fineness as in the present invention and using a spun yarn with a high-speed air fluid, a spun yarn with a small number of fluffs is possible. It is not preferable for a bulky and loose structure such as a smooth or pile structure because sufficient anti-pill property cannot be obtained. On the other hand, if the number of fluffs of lmm or more is less than 30, spun yarn having a high degree of entanglement and a small diameter is obtained, and the pill resistance is increased. As a result, the ultraviolet ray shielding rate targeted by the present invention is reduced, and The excess rate increases, which is not preferable.

[0022] In the fabric of the present invention, by using at least the above-mentioned polyester spun yarn, the visible light transmittance at 380 to 780 nm is 40% or less, the 280 to 400 nm wavelength ultraviolet shielding factor is 84 Q / o or more, and the JIS

L-1076 (1992) It is possible to obtain a polyester fiber-containing fabric having a pilling grade of 3 or higher in Method A. At that time, these fibers may be used alone, or may be blended with other fibers, mixed fibers, intertwisted, interwoven, or interwoven, and the polyester fiber may be used in the surface layer of the fabric.

[0023] In the dyeing process of the fabric of the present invention, similar to other polyester fibers, ordinary dyeing process is performed after scouring. High pressure dyeing power of 120-130 ° C for normal polyester fiber High-pressure dyeing from normal pressure of 98-120 ° C is adopted for cation dyeable modified polyester. In the present invention, finishing can be performed without using an ultraviolet absorber, but a smaller amount than usual of an ultraviolet absorber may be used. In the case of woven fabrics, the hair may be subjected to hair-burning and shearing treatment in the process before dyeing or after dyeing. May be improved.

Example

Hereinafter, the present invention will be described with reference to examples.

In both Examples and Comparative Examples, using a polyester resin having an intrinsic viscosity of 0.63, spinning at a polymer temperature of 290 ° C and a spinning speed of 1600 mZ, respectively, using spinnerets for Y-shaped variant, hollow and medium practical After drawing at a speed of 140 mZ at a temperature of 112 ° C, the draw ratio is 2.34 for Y-shaped heterogeneous fibers, 2.84 for hollow fibers (both round, triangular, and tagata), and 2 for solid fibers. 60, polyester short fibers with a cut length of 38 mm and a number of crimps of 14 Z25 mm each were obtained.

[0025] The binding spinning was performed using Murata Voltex Spinner MVS manufactured by Murata Machinery Co., Ltd. at a nozzle pressure of 0.45 MPa and a spinning speed of 350 m / min. However, in Example 5, only the spinning speed was 400 m / min, and in Comparative Example 6, only the spinning speed was 200 m / min. The ring spun yarn of Comparative Example 1 had a twist coefficient of 3.2, and all of the points obtained English cotton count of 30. Smooth structure of the knitted fabric is 22 gauge, norepe length 325 mm, number of wenoles is 100, and sheet of cotton is 28 gauge, norepe length 275 mm ゥ, knitted with 100 ell. Further, the fabric was opened, wet-processed, dried, and subjected to an intermediate setting at 180 ° C. for 40 seconds. After that, both smooth and sheeting are dyed in separate batches using a high-pressure jet dyeing machine (130 ° C, 20 minutes, 0.8% omf fluorescent disperse dye), reduced, washed, dehydrated and dried. A second finishing set was performed.

[0026] The measurement conditions of the knitted fabric are as follows.

(1) UV shielding and visible light transmittance

-Using a Shimadzu UV-3100PC integrating sphere accessory device ISR-3100 integrating sphere inner diameter 60 mm (ultraviolet rays, using a filter), the measurement was carried out under the following conditions.

• Standard white board: barium sulfate

• Measurement wavelength of UV shielding factor: 280nm-400nm

• Visible light transmittance measurement wavelength: 380nm-780nm

(2) Fabric thickness: Two fabrics were piled up using a dial thickness gauge, and the center of the fabric was measured five times in the length direction, and the average value per fabric was determined.

(3) Pilling: Measured in accordance with JIS L-1076 (1992) A method (determined by ICI type tester 5 hours).

(4) Evaluation of raw cotton and fabric: The following three grades were used.

〇: good, 〇 △: good, X: bad.

[0027] The ultraviolet ray shielding rate and the visible light transmittance of a fabric are generally determined by the polymer properties of the fiber and the fiber form.

(Irregularity, cross-sectional shape, presence or absence of crimp, and the amount thereof), type and content of inorganic particles, single yarn fineness, yarn fineness / twisted structure, density, structure, thickness, hue, and the like of the structure. Table 1 below shows the evaluation results of the obtained fibers and the knitted fabrics using the fibers.

[Table 1]

[0029] In Examples 1 to 5, the pilling with a small number of fluffs is a satisfactory level in the smooth texture as well as in the sheeting, with a grade of 4-5 or more. Also, compared to the comparative example, the fabric thickness (bulkness) is high, the ultraviolet ray shielding rate is high, and the visible light transmittance is low. On the other hand, in Examples 3 and 4, although the amount of titanium oxide was slightly large, whiteness, and therefore, sufficient whiteness was obtained as compared with Comparative Example 5, which did not impair the color developability. Comparative Example 1 is excellent in both the ultraviolet ray shielding rate and the visible light transmittance, but is poor in pilling of a 1-2 class, especially in a smooth structure having many fluffs. Comparative Example 25 has less fluff and has a pilling grade of 3 or higher. Both of them are inferior in ultraviolet ray shielding rate and visible light ray transmittance. This is due to the fact that the thickness of the fabric is inferior to that of Example 1-5, which is likely to be bulky, and that the fibers have a large friction with the metal or the metal. It is considered that the low surface reflectivity of the surface influences.

[0030] Further, Comparative Examples 2-5 in which the fiber cross-section was round or low atypical degree were the Υ-shaped fibers of Examples 1, 4 and 5. Strength While the fabric exhibited a soft texture with cushioning properties, the fabric was inferior in thickness and coarse and hard, with a strong texture. In Example 5, the number of fluffs increased in comparison with Example 1, but it was close to the ring yarn and had a soft feel, and the pilling was smooth and maintained the fourth class, and it was at a level with sufficient performance there were.

[0031] In Comparative Example 6, the number of fluffs having a length of lmm or more was sharply reduced to 25, and the anti-pilling property was improved, as compared with other levels of force, which is a level at which the yarn speed during spinning was reduced. However, due to the high degree of confounding, the texture became a hard texture with a jerky taste, which was completely different from the bulky and soft textures found in Examples 1 and 4, and The knitted fabric has a low transmittance and a high visible light transmittance.

[0032] It was found that all of the examples had practical anti-pill properties and coloring properties, and had an ultraviolet ray shielding rate and an effect of preventing see-through, which were close to those of Fuldar yarn. Compared to ring spinning, united spinning has a smaller number of fluffs and is more resistant to pills, but has a drawback in that it has a hard feel different from that of ring yarns, and it is difficult to improve it. Only those satisfying the constitutional requirements of the present invention have the pill property, the ultraviolet ray shielding property, the see-through prevention property, the coloring property and the like.

[0033] Table 2 shows the evaluation results of the anti-pilling property when the spun yarns described in Examples and Comparative Examples in Table 1 were used and the structure was smooth.

[0034] [Table 2]

Industrial applicability

ADVANTAGE OF THE INVENTION By this invention, it became possible to provide the air entangled spun yarn which has a soft feeling, and has anti-pill property, ultraviolet shielding property, see-through prevention property, coloring property, etc., and a cloth using the same. The air entangled spun yarn of the present invention and a fabric containing the same are used for a shirt, a blouse, Jar knits, golf knits, sweaters, jackets, pants, skirts, swimwear, underwear, uniforms, etc. It can be suitably used for diapers and the like.

Claims

The scope of the claims

[1] Three or more protrusions present on the fiber circumference with a titanium oxide content of less than 1.0% by mass are continuous in the fiber length direction. Air entangled spun yarn containing high irregularity polyester fibers with a circumscribed circle ratio of 1.8 or more and / or hollow polyester fibers with a hollow ratio of 8% or more, and a polyester fiber fineness of 3.5 dtex or less. An air-entangled spun yarn in which the number of fluffs per 10 m of the spun yarn has a length of 30 mm or more and less than 350 pieces per lm and a length of 3 mm or more less than 15 pieces.

[2] The air-entangled spun yarn according to claim 1 is included at least in part, and the pilling according to JIS L-1076 (1992) method A is 3rd class or higher, the ultraviolet ray shielding ratio is 84% or higher, and visible light A polyester fiber-containing fabric having a transmittance of 40% or less.