JP2001348776A - Fibrous structure containing cotton fiber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fibrous structure containing cotton fiber, having high mechanical strength retention after subjected to resin finishing. SOLUTION: This fibrous structure containing cotton fiber comprises spun yarns containing cotton fiber and treated in an aqueous liquid under tension and is characterized by having undergone crosslinking treatment with a cellulose-crosslinking agent.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to cotton (hereinafter referred to as "cotton") which is suitable for semi-finished products such as yarns, fabrics and knits, clothing for dress shirts, blouses, pants, jackets and the like, and for sundries such as hats, handkerchiefs and towels. And simply referred to as cotton). More specifically, the present invention relates to a cotton fiber-containing fiber structure having a significantly improved strength reduction in forming a crosslinked structure.

[0002]

2. Description of the Related Art In recent years, ozone layer destruction has been reported, and a dry cleaning solvent has been pointed out as one of the causes. Washing using water as a medium has again attracted attention. In the field of clothing and sundries containing cotton fibers, shrinkage and wrinkling during washing with water cause problems in consumption performance. Therefore, resin processing with a cellulose crosslinking agent is generally performed. The resin processing includes a pre-cure method, a post-cure method, a gas phase processing method, and the like. The resin processing agents used are mainly glyoxal type in the former two cases, polycarboxylic acid type in the special case, and formaldehyde in the latter case.

[0003]

Generally, when a cellulose fiber is resin-processed with a cellulose cross-linking agent, the strength is significantly reduced as the degree of cross-linking advances. The causes include distortion of each of the yarn and the woven or knitted fabric, stiffening of the fibers due to crosslinking, cutting of cellulose molecules by an acid catalyst for a crosslinking reaction, and the like. As remedies for this point, it has been known to increase the degree of orientation of the crystal of the cotton fiber with respect to the fiber axis by pretreatment with an alkali swelling agent, appropriately lengthen the crosslinked chain length, and use a latent acid catalyst. Have been. In particular, liquid ammonia pretreatment is effective for improving the degree of crystal orientation. However, it cannot be said that such a sufficient strength reduction suppressing effect was obtained. In particular, 50th single yarn,
Cotton fabrics with finer counts such as 100-count double yarn, 60-th single yarn, and 120-th double yarn, and raw cotton with low fiber strength, because the strength itself before resin processing is low, the strength after resin processing is lower. However, the suitability for consumption is insufficient, and further improvement is required.

[0004]

Means for Solving the Problems The inventors of the present invention have conducted intensive studies to solve the above-mentioned problems, and as a result, have previously conducted a tension treatment of cotton fiber-containing spun yarn in water to suppress its elongation. It has been found that increasing the degree of orientation of the amorphous portion of the cotton fiber by the above process can suppress a decrease in the strength of the cotton fiber-containing fiber structure due to resin processing.

That is, the present invention provides: A cotton fiber-containing fiber structure using a cotton fiber-containing spun yarn that has been subjected to a tension treatment in an aqueous liquid, and wherein the cotton fiber-containing fiber structure is cross-linked with a cellulose cross-linking agent. 1. a fiber-containing fiber structure; 2. The cotton fiber-containing fibrous structure according to the above 1, wherein the aqueous liquid is at least one liquid selected from the group consisting of water, a warp glue, and an oil. The cotton fiber-containing spun yarn may be a thread-shaped one subjected to a mercerization treatment and then subjected to a tension treatment in an aqueous liquid, or a tensioned treatment in an aqueous liquid followed by a mercerization treatment. 3. The cotton fiber-containing fiber structure according to the above 1 or 2, 4. The cotton fiber-containing fiber structure according to the above item 3, wherein the cotton fiber-containing spun yarn is a yarn-dyed yarn. The tensioning treatment is performed in the range of 25 to 20 per spun yarn containing cotton fiber.
5. The cotton fiber-containing fiber structure according to any one of the above items 1 to 4, wherein the load is 0 cN; The cotton fiber-containing fiber structure according to any one of the above items 1 to 5, wherein the cellulose crosslinking agent is gas-phase formaldehyde.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION The aqueous liquid in the present invention is water or a liquid containing water, an aqueous solution, an aqueous dispersion or the like. Suitable examples include warp sizing agents, oil agents, and various fiber treatment agents used in the field of textiles other than water.
These aqueous liquids are appropriately heated and heated as needed.

The cellulose crosslinking agent in the present invention is a known processing agent such as a urea formalin resin, a melamine formalin resin, a glyoxal resin, and formalin, and is used by a known processing method.

In the present invention, the cotton fiber-containing spun yarn is positively tensioned to increase the degree of orientation of the amorphous portion of the cotton fiber. As a method of increasing the degree of orientation of the amorphous portion of the cotton fiber,
There is a method in which a cotton fiber-containing spun yarn is subjected to a tension treatment (hereinafter, sometimes simply referred to as a water treatment) in the above-mentioned aqueous liquid. Load applied during water treatment is 25-200 cN per cotton yarn
And preferably 50 to 150 cN, more preferably 100
~ 150 cN.

The spun yarn containing cotton fiber in the present invention is cotton yarn, liquid ammonia treatment, aqueous solution of sodium hydroxide and a combination thereof, dyed with cotton yarn such as reactive dye and vat dye. Yarn-dyed yarn and the like.

In the present invention, it is also useful to use an agent capable of changing the crystal structure of cotton fibers.
Such mercerizing agents include alkalis such as lithium hydroxide, sodium hydroxide, potassium hydroxide, ethylamine, liquid ammonia, hydrazine, and combinations thereof. It is also effective to treat the woven or knitted fabric made of the water-treated cotton spun yarn with liquid ammonia, sodium hydroxide or a combination thereof in terms of the strength retention after resin processing, and liquid ammonia treatment is particularly preferable. Further, a combination treatment of sodium hydroxide / liquid ammonia is also a preferable treatment method as a system in consideration of dyeability.

The cotton fiber-containing fiber structure in the present invention is a cotton fiber alone or other fibers, such as natural cellulose fibers such as ramie, linen, kenaf, pulp, and bacterial cellulose, and viscose rayon (including polynosic). ), Regenerated cellulose fibers such as copper-assay rayon, solvent-spinning rayon, etc., protein fibers such as silk, wool, promix fibers, and synthetic fibers such as polyester, polyamide, acrylic, polyethylene and polypropylene. Spun yarn, woven, knitted or shirt, blouse,
It refers to clothing such as pants and jackets and miscellaneous goods such as hats, handkerchiefs and towels. When the cotton fiber is mixed with other fibers, the content of the cotton fiber is preferably 20% by weight or more, more preferably 30% by weight or more, and still more preferably 50% by weight or more, in order to exhibit the characteristics of the present invention more. It is.

[0012]

EXAMPLES The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. The evaluation method used in the examples is shown below. Measurement of strength, elongation and strength retention for spun yarn with and without resin processing:
In the case of a woven fabric, the weft yarn was fractionated, and the breaking strength and elongation were measured according to JIS L 1095-1990 (standard). The strength retention was shown as a percentage of the breaking strength ratio before and after resin processing.

Determination of the amount of bound formaldehyde: Abe et al.
The measurement was carried out according to the method of the Japan Society of Textile Machinery, 50, T124 (1997).

Example 1 30 loops were collected in a skein shape using a cotton yarn count of 120 / double yarn.
With a load of 75N applied to the lower end of the skein-like cotton thread, immersed in a water tank containing 0.1% by weight of a surfactant (manufactured by P & G, Joy) at 20 ° C. And air-dried. The raw yarn was subjected to a conventional gas phase formaldehyde treatment. The characteristics of the raw yarn are shown in Table 1.

Example 2 A raw yarn of 120 count cotton / double yarn was mercerized with a 25 ^° Be sodium hydroxide aqueous solution. Then, 0.1% by weight of a surfactant (P & G
100 cN per raw thread in a water tank containing Joy)
After applying a load tension, the sample was dried. This mercerized yarn was subjected to a conventional gas-phase formaldehyde treatment. Table 1 shows the characteristics of the mercerized yarn.

Example 3 A yarn dyed at a count of 60 / single yarn was subjected to tension treatment in water in the same manner as in Example 1. This yarn-dyed yarn was subjected to a conventional gas-phase formaldehyde treatment. The properties of the yarn are shown in Table 1.

Example 4 A broad woven fabric obtained by weaving in a conventional manner the warp yarn subjected to tension treatment under water as a warp yarn and a weft yarn of Example 1 was desizing and scouring, and a shirt was sewn. This shirt was subjected to conventional gas-phase formaldehyde processing. Table 1 shows the properties of the weft yarns separated from the shirt.

Example 5 The warp yarn under tension in water of Example 1 is woven as a warp yarn and a weft yarn by a conventional method, and after desizing, scouring and bleaching, 25
° Be 'A shirt was sewn using a broad woven fabric mercerized with an aqueous sodium hydroxide solution. This shirt was subjected to conventional gas-phase formaldehyde processing. Table 1 shows the properties of the weft yarns separated from the shirt.

Example 6 The procedure of Example 1 was repeated, except that a load of 30 N was applied to the lower end of the skein-shaped cotton thread. The raw yarn was subjected to a conventional gas phase formaldehyde treatment. Table 1 shows the properties of the obtained raw yarn.

Comparative Example 1 The procedure of Example 1 was repeated, except that no load was applied to the lower end of the skein-shaped cotton thread. This cotton yarn was subjected to a conventional gas-phase formaldehyde treatment. Table 1 shows the characteristics of the cotton yarn.

Comparative Example 2 The procedure of Example 2 was repeated, except that the treatment was carried out with a warp sizing machine under no tension. This mercerized yarn was subjected to a conventional gas-phase formaldehyde treatment. Table 1 shows the characteristics of the mercerized yarn.

Comparative Example 3 Example 3 was carried out in the same manner as in Example 3 except that the pre-dyed yarn was not subjected to a tension treatment in water. This yarn-dyed yarn was subjected to a conventional gas-phase formaldehyde treatment. The properties of the yarn are shown in Table 1.

Comparative Example 4 The procedure of Example 1 was repeated, except that a load of 12 N was applied to the lower end of the skein. The raw yarn was subjected to a conventional gas phase formaldehyde treatment. Table 1 shows the characteristics of the raw yarn.
Shown in

[0024]

[Table 1] 1) The strength ratio (strength retention;%) before and after gas phase formaldehyde processing is shown.

[0025]

According to the present invention, it is possible to greatly improve the strength retention of the cotton fiber-containing fiber structure after resin processing.

[Brief description of the drawings]

FIG. 1 is a diagram showing a relationship between a load at the time of a tension treatment of a cotton yarn and a strength of a vapor-phase formaldehyde-treated cotton yarn.

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Inventor Masatoshi Yoshikawa 50 Inuuchi, Daimon-cho, Imizu-gun, Toyama F-term (reference) in Shobo Plant of Toyobo Co., Ltd. 4L031 AA02 BA11 BA33 CA01 CA09 DA00 DA11 4L033 AA02 AC15 BA10 BA98 BA99 DA07

Claims (6)

[Claims] 1. A cotton fiber-containing fiber structure using a cotton fiber-containing spun yarn that has been tensioned in an aqueous liquid, and the cotton fiber-containing fiber structure is cross-linked with a cellulose cross-linking agent. A cotton fiber-containing fiber structure characterized by the following. 2. The method according to claim 1, wherein the aqueous liquid is at least one liquid selected from the group consisting of water, a warp glue and an oil.
The cotton fiber-containing fiber structure according to the above. 3. The cotton fiber-containing spun yarn is a thread-shaped, mercerized, and then tensioned in an aqueous liquid, or a tensioned in an aqueous liquid, and then mercerized. The cotton fiber-containing fibrous structure according to claim 1 or 2, wherein: 4. The cotton fiber-containing fiber structure according to claim 3, wherein the cotton fiber-containing spun yarn is a yarn-dyed yarn. 5. The method according to claim 1, wherein the tensioning treatment is performed with a load of 25 to 200 cN per spun yarn containing cotton fiber.
5. The cotton fiber-containing fiber structure according to any one of 4. 6. The cotton fiber-containing fiber structure according to claim 1, wherein the cellulose crosslinking agent is gaseous formaldehyde.