JP3529089B2 - Processing method of refined cellulose fiber woven or knitted fabric - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a woven or knitted fabric made of a purified cellulose fiber known by a trade name such as Tencel. [0002] Purified cellulose fiber is a new regenerated cellulose fiber obtained by solvent spinning using pulp as a raw material.
Tencel (trade name) manufactured by Coatles, Lyocell (trade name) manufactured by Lenzing, and the like are known. This fiber has tensile strength comparable to polyester, is superior in physical properties such as less decrease in strength when wet compared to regenerated cellulose such as rayon, and is manufactured by a closed recycling system that recovers solvent Attention has been paid to applications for clothing and the like. [0003] However, since the purified cellulose fiber swells greatly in water, it becomes very hard in water, and when subjected to a physical action in water, a part of the fiber is peeled off and fibrillated to generate a large amount of fluff. And many problems such as spots occurred in the dyeing / finishing process. Therefore, currently, the following processing steps are generally taken. [0004] That is, a woven or knitted fabric made of purified cellulose fiber is sufficiently fibrillated by (1) fir / tataki treatment. (2) Fuzz is cut off by bioprocessing with an enzyme, leaving hair-like fibrils. As a result, a woven or knitted fabric having a faint color tone and an excellent soft drape property can be obtained. In addition, resin processing is not generally performed in order to make the most of the light brushed texture. [0005] However, even after these steps, the following problems remain. (1) Since it becomes hard in water, troubles such as threads and hits occur frequently during processing. (2) The texture becomes extremely hard after washing at home, and pills are likely to occur. (3) If the cloth is strongly rubbed with dirt or the like, it becomes partially white. (4) Since all processes are batch processing, the processing cost is high. SUMMARY OF THE INVENTION The present invention solves these problems, and is flat, has a glossy surface, has an appropriate firmness and stiffness, has good wrinkle resistance and shrink resistance, and has good repetition. An object of the present invention is to provide a method for processing a woven or knitted fabric made of a purified cellulose fiber which is difficult to fibrillate even after washing. According to the present invention, the swelling of the fiber is suppressed by performing liquid ammonia treatment in particular,
That the curing phenomenon in water is considerably reduced, and
It has been found that the above-mentioned problem can be solved by subsequently performing resin processing.According to the present invention, purified cellulose fiber woven or knitted fabric is burnt on the woven or knitted fabric as required,
Desizing, scouring, bleaching, mercerizing, etc.
Or, after applying print processing, liquid ammonia processing, and then removing attached ammonia by heating
Then , a purified cellulose fiber woven or knitted fabric is provided which is processed with a resin to prevent fibrillation after washing . DETAILED DESCRIPTION OF THE INVENTION In the present invention, a purified cellulose fiber is a regenerated cellulose fiber obtained by a solvent spinning method, and is a fiber whose trade name is known as Tencel, Lyocell, or the like. Composite fibers obtained by mixing other natural fibers such as cotton and hemp, regenerated fibers such as rayon, polynosic, cupra, and synthetic fibers such as polyester and polyamide with these fibers. In this case, the content of the purified cellulose fiber in the composite fiber is preferably 50% by weight or more. [0009] The fibers are made into filaments or staple spun yarns, and woven or knitted by a usual method to form a woven or knitted fabric. [0010] As a pre-treatment for the processing of the present invention, the woven or knitted fabric can be subjected to a process such as fuming, desizing, scouring, bleaching, mercerizing as required. The woven or knitted material may be dyed or printed. The liquid ammonia treatment can be carried out, for example, by impregnating the woven or knitted material with liquid ammonia maintained at a temperature of −33 ° C. or less at normal pressure. As the impregnation method, a method of dipping in a liquid ammonia bath, a method of spraying or coating with liquid ammonia, and the like can be used. Generally, the impregnation time of liquid ammonia is 5-40.
Seconds are appropriate. Here, liquid ammonia is most commonly used, but lower alkylamines such as methylamine and ethylamine may be used in some cases. The woven or knitted fabric treated with liquid ammonia removes ammonia adhered thereto by heating. [0013] The purified cellulose fiber woven or knitted fabric which has been treated with liquid ammonia is prevented from swelling in water, and the curing phenomenon in water is considerably reduced. In the present invention, if necessary, dyeing can be performed after the liquid ammonia treatment. Next, resin processing is performed. Examples of resin processing agents include aldehydes such as formaldehyde, glyoxal, and glutaraldehyde, epoxy compounds such as diglycidyl ether, polycarboxylic acids such as tetrabutanecarboxylic acid, dimethylol urea, and trimethylol. Cellulose-reactive methylol compounds such as melamine, dimethylol ethylene urea, and dimethylol dihydroxyethylene urea are exemplified. Of these, fibrin-reactive methylol compounds are preferable, and dimethylol dihydroxyethylene urea is particularly preferable. The amount of the resin processing agent added is 2.5 to 15% by weight, preferably 4 to 8% by weight, based on the solid content of the woven or knitted material to be processed. If the addition amount is 2.5% by weight or less, fibrillation cannot be sufficiently prevented, and
There is a problem that the anti-wrinkle property and the anti-shrink property are also insufficient.
If the content is more than 10% by weight, there is a problem that the strength is greatly reduced. A catalyst can be added to the resin processing agent of the present invention in order to increase the reaction activity between the above-mentioned resin processing agent and cellulose and to perform resin processing quickly. As the catalyst, a catalyst usually used for resin processing can be used. For example, borofluoride compounds such as ammonium borofluoride, sodium borofluoride, potassium borofluoride, zinc borofluoride, magnesium chloride, magnesium sulfate, Examples include neutral metal salt catalysts such as magnesium nitrate, and inorganic acids such as phosphoric acid, hydrochloric acid, sulfuric acid, sulfurous acid, hyposulfurous acid, and boric acid. These catalysts may be used together with an organic acid such as citric acid, tartaric acid, malic acid, maleic acid or the like as a cocatalyst, if necessary. If necessary, an auxiliary agent such as glycerin, ethylene glycol or polyethylene glycol can be added to the resin processing agent in order to promote the reaction between cellulose and resin. Further, a softening agent for adjusting texture, a formalin catcher for reducing the concentration of free formalin, and the like can be added. In the present invention, as a method of applying a resin processing agent to the woven or knitted material, a usual pad dry method or a method such as a gas phase reaction with formaldehyde can be employed. For example, in the pad dry method, the woven or knitted fabric is immersed in a preparation liquid containing a resin processing agent, squeezed at a squeezing rate of 50 to 120%, and dried at an ambient temperature of about 120 ° C. Subsequently, a resin processing agent and cellulose were added to 1
The woven or knitted fabric of the present invention can be obtained by performing a heat treatment at a temperature of 20 to 180 ° C. for 1 to 10 minutes to generate crosslinks. EXAMPLES The present invention will be described below in detail with reference to examples, but the present invention is not limited to these examples. The measurement and evaluation of the fabric performance in the examples were performed by the following methods. (1) Tensile strength: JIS L 1096 labeled strip method (2) Tear strength: JIS L 1096 Pendulum method (3) Wrinkle prevention: JIS L 1059 Monsanto method (4) W & W property: JIS L 1096 A method, tumble drying (5) Shrinkage: JIS L 1042 F-2 method, tumble drying (6) Flexural resilience (rigidity): JIS L 1096 Gurley method (7) Continuous washing test: JIS L 1042 F-2 method, tumble drying (8) Burst strength: JIS L 1096 Mullen method [Example 1] Normally applied to a 40% Tencel 100% plain woven fabric (density 130 / inch, weft density 70 / inch) in both warp and weft. The hair was burnt, desized, bleached, treated with liquid ammonia for 10 seconds, and then dyed with a reactive dye to dark nevy. Next, it is immersed in the treatment solution of the following prescription 1, squeezed to 70% of the pickup with a mangle, dried, and heated to 160 ° C.
For 2 minutes. Through these steps,
A resin processed cloth according to the method of the present invention was obtained. [Prescription 1] Sumitec Resin FSK 100g / l (dimethylol thiocyanoxyethylene urea, Sumitomo Chemical) Zinc borofluoride 15g / l (acid catalyst) Gara Silicon Softener XC-901 30g / l (amino silicon softener, Ohara Gara ) Polyethylene glycol 100 g / l (cellulose swelling agent, degree of polymerization 200) [Comparative Example 1] For comparison with the present invention, after bleaching of Example 1, dyeing was carried out in dark navy without liquid ammonia treatment. Then, it was immersed in a treatment liquid containing only a softener having the following formulation 2, squeezed by a mangle to a pickup of 70%, and dried to obtain a work cloth for comparison. [Formulation 2] Gara Silicon Softener XC-901 30g / l (aminosilicone softener, Ohara Garashi) [0024] The processed cloth obtained in Example 1 and Comparative Example 1
Table 1 shows the measurement results of the physical properties. [Table 1] As is clear from Table 1, the work cloth according to the method of the present invention has better wrinkle resistance, W & W properties and shrink resistance than the work cloth of the comparative example, and almost no fibrillation is observed even after washing. I couldn't. The surface is flat and shiny,
It had moderate firmness and firmness. From the results of the measurement of the softness, the numerical value of the work cloth of Example 1 was not significantly different between dry and wet, whereas the numerical value of the work cloth of the comparative example was greatly increased by wet, and the work cloth was wet. It can be confirmed that it becomes very hard sometimes. [Example 2] A knit made of sheet-knitting was prepared using 100% yarn of Tencel No. 40. After subjecting this knit to normal hair-burning and bleaching, it is subjected to liquid ammonia treatment for 10 seconds, then dyed into a dark brown color using a reactive dye, then immersed in a treatment solution of the following formula 2, and picked up with a mangle. It was squeezed to 100%, dried and baked at 160 ° C. for 90 seconds. Through these steps, a resin processed cloth according to the method of the present invention was obtained. [Prescription 1] Sumitec Resin FSK 60g / l (dimethylol thiocyanoxyethylene urea, Sumitomo Chemical) Catalyst M 1.8g / l (Macnesium chloride, Dai Nippon Ink) Bara Silicon Softener XC-901 30g / l (amino silicone softener [Comparative Example 2] For comparison with the present invention, after bleaching in Example 2, dyeing in dark brown without liquid ammonia treatment, and then treatment with only a softener of the following formula 2 It was immersed in the solution, squeezed to 100% pickup with a mangle, and dried to obtain a work cloth for comparison. [Formulation 2] Gara Silicon Softener XC-901 30 g / l (aminosilicone softener, Ohara Garashi) The processed cloth obtained in Example 2 and Comparative Example 2
Table 2 shows the measurement results of physical properties. [Table 2] As is clear from Table 2, the work cloth according to the method of the present invention had better W & W properties and shrink resistance than the work cloth of the comparative example, and almost no fibrillation was observed even after washing. In addition, the surface was flat and had a glossy surface, and had moderate firmness and firmness. According to the present invention, a woven or knitted fabric comprising a purified cellulose fiber having the following excellent characteristics can be obtained. (1) Flat and glossy surface. (2) It has moderate firmness and firmness, and good texture. (3) The degree of curing is low even when immersed in water. (4) Fibrillation after washing can be prevented. (5) Good wrinkle resistance and shrink resistance.

Claims (1)

(57) Claims: 1. A purified cellulose fiber woven or knitted fabric, required response
The woven and knitted fabric is burnt, desizing, scouring, bleaching, mercerizing
After processing, such as dyeing or printing,
Ammonia adhering after liquid ammonia treatment
Was removed by heating, followed Fi after resin treatment to wash
A purified cellulose fiber woven or knitted fabric characterized by preventing brillation.