JP2006052480A - Method for processing cellulosic fiber-containing cloth and the cellulosic fiber-containing cloth - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for processing a cellulosic fiber-containing cloth, capable of furnishing the cloth with shape retention, such as crease resistance and wash-and-wear properties, while keeping practicable strength, and capable of efficiently treating the cloth by heat treatment in a short time, and to provide the cellulosic fiber-containing cloth processed by the method. <P>SOLUTION: This method for processing the cellulosic fiber-containing cloth comprises applying a processing liquid containing a crosslinking agent and a crosslinking catalyst to a cellulosic fiber-containing cloth, then adjusting a water content of the cloth to be constant, and subjecting the cloth to the heat treatment in a contacting manner, so as to conduct crosslinking reaction of the cloth with wet heat under high pressure. Thus, the cellulosic fiber-containing cloth which is furnished with the high crease resistance and wash-and-wear properties, while the practicable strength and whiteness of the cloth are kept. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for processing a cellulosic fiber-containing fabric. More specifically, the present invention improves the antifungal property, wash-and-wear (W & W) property of the cellulosic fiber-containing woven fabric, and reduces the decrease in strength. The present invention relates to a method for processing a cellulosic fiber-containing fabric and a fabric obtained by the method.

  Conventionally, various cross-linking agents (resin processing agents) and resin processing methods have been studied in order to impart shape-stabilizing performance such as anti-mold or anti-shrink property to cellulosic fiber-containing fabrics.

  By the way, the cause of wrinkles on the dough or shrinkage of the dough is caused by the fact that hydrogen bonds in the amorphous region of cellulose are broken and deformed by the action of external force or water, and hydrogen bonds are generated again in that state. .

  The imparting of anti-mold or anti-shrink property by resin processing of the fabric is based on the fact that cross-linking is generated between cellulose molecules by a cross-linking agent, and this hydrogen bond is not easily broken by the external force or the action of water. In this case, as the crosslinking agent, a method using a so-called fibrin-reactive resin such as glyoxal resin is generally used.

  In addition, a method of forming a film using a polyurethane resin or the like to restrain the movement of the fibers and a method of using a crosslinking agent such as a urea formalin resin or a methylol melamine resin are also known in order to give the fabric a mildew-proofing process. ing.

  On the other hand, various types of processing using a compression / shrinking processing machine have been proposed as physical shrinking processing methods.

  These processing methods require heat treatment under a high temperature condition for a certain period of time or more after applying a crosslinking agent and a catalyst to the dough in order to obtain high antifungal properties and wash and wear (W & W) properties. is there. However, there has been a problem in that the cellulose fibers cause hydrolysis and the like during the heat treatment, resulting in a decrease in strength and whiteness of the fabric.

  In order to suppress such decrease in strength and decrease in whiteness to such an extent that there is no practical problem, when the crosslinking reaction is carried out by reducing the amount of crosslinking agent or catalyst applied or by lowering the heat treatment temperature, sufficient protection is achieved. In order to achieve the properties and W & W properties, problems such as deterioration of thermal efficiency and increase in processing time occur, and it is necessary to obtain a fabric having flaw resistance and W & W properties and having sufficient strength and whiteness. It was difficult.

In addition, as a well-known document relevant to this invention, there exist the following.
Japanese Patent No. 2930247 JP 58-208472 A

  The present invention has been made in view of the above circumstances. Cellulosic fibers can be efficiently processed with a short heat treatment while imparting form stability such as antifungal properties and W & W properties to a cellulosic fiber-containing fabric while maintaining practical strength. A method for processing a containing fabric and a cellulosic fiber-containing fabric obtained by this processing method are provided.

  As a result of intensive studies to achieve the above object, the present inventor adjusted the moisture content of the fabric within a certain range after applying a treatment liquid containing a crosslinking agent and a catalyst to the cellulosic fiber-containing fabric. Then, by performing a contact-type heat treatment and carrying out a cellulose crosslinking reaction under high pressure of wet heat, it is possible to improve the form-stabilizing performance such as fender resistance and W & W properties without causing a significant decrease in the strength of the fabric. The present inventors have found that processing can be efficiently performed in a short time without causing problems such as hue change, and energy saving in the process can be realized.

Therefore, the present invention
(1) After a treatment liquid containing a crosslinking agent and a crosslinking catalyst is applied to a cellulose-based fiber-containing fabric, the moisture content of the fabric is adjusted to a constant value, and then a contact-type heat treatment is performed to perform a crosslinking reaction under high pressure of wet heat. A method for processing a cellulosic fiber-containing fabric,
(2) The method for processing a cellulosic fiber-containing fabric according to (1), wherein the moisture content of the fabric is adjusted to 5 to 30%.
(3) The processing method of the cellulosic fiber-containing fabric according to (1) or (2), wherein the treatment pressure in the contact-type heat treatment is 0.5 to 2.0 kgf / cm ² .
(4) The processing method of the cellulosic fiber-containing fabric according to (1), (2) or (3), wherein the treatment time in the contact heat treatment is 5 to 30 seconds,
(5) Provided is a cellulosic fiber-containing fabric obtained by the processing method according to any one of (1) to (4).

  According to the present invention, it is possible to obtain a cellulosic fiber-containing fabric imparted with high antifungal properties and W & W properties while maintaining practical strength and whiteness.

  In the processing method of the present invention, a treatment liquid containing a cross-linking agent and a cross-linking catalyst is applied to a cellulosic fiber-containing fabric, and then the moisture content of the fabric is adjusted to be constant, followed by contact-type heat treatment.

  Here, examples of the cellulosic fiber-containing fabric of the present invention include woven fabrics, knitted fabrics, and nonwoven fabrics. Cellulosic fibers constituting these fabrics include natural fibers such as cotton, hemp, viscose rayon, copper ammonia rayon (cupra), tencel (purified cellulose), polynosic, acetate, and regenerated or semi-regenerated cellulose fibers. Further, these natural, regenerated or semi-regenerated cellulose fibers can be used by blending, knitting, knitting, etc. with synthetic fibers such as polyester, nylon, acrylic, polyurethane and the like. In this case, the proportion of cellulosic fibers in the fabric is preferably 30% by mass or more and more preferably 50% by mass or more from the viewpoint of water absorption, hygroscopicity, texture, and the like. The upper limit is not particularly limited, and the cellulosic fiber may be 100% by mass. In the present invention, among the cellulosic fibers, cotton fibers can be preferably used.

  These cellulosic fiber-containing fabrics can be subjected to known treatments such as hair firing, desizing, scouring, bleaching, mercerizing and the like as pretreatment as necessary. The fabric may be dyed or printed.

In the method of the present invention, first, a treatment liquid containing a crosslinking agent (resin processing agent) and a crosslinking catalyst is applied to the cellulosic fiber-containing cloth, and the cloth is impregnated with the treatment liquid.
Here, the cross-linking agent used in the present invention may be any as long as it reacts with the hydroxyl group of cellulose to form cross-links. Examples of such cross-linking agents include formaldehyde, glyoxal, glutaraldehyde, and the like. Aldehydes, epoxy compounds such as diglycidyl ether, polycarboxylic acids such as tetrabutanecarboxylic acid, fibrin-reactive N-methylol compounds such as dimethylolurea, trimethylolmelamine, dimethylolethyleneurea, dimethyloldihydroxyethyleneurea, etc. Among these, a fiber-reactive N-methylol compound, a glyoxal-based resin, and the like are particularly preferable from the viewpoint of good balance between antifouling accompanying resin processing, improvement in W & W performance, and reduction in fabric strength.

  The addition amount of the crosslinking agent is preferably 1 to 10% by mass, and more preferably 2 to 6% by mass as a solid content with respect to the mass of the cellulosic fiber-containing fabric subjected to crosslinking (resin processing). If the addition amount is less than 1% by mass, the effect of crosslinking may not be sufficiently exhibited. If the addition amount exceeds 10% by mass, the strength reduction associated with crosslinking may be significant.

  A crosslinking catalyst is added to the crosslinking agent of the present invention in order to increase the reaction activity between the crosslinking agent and cellulose and to rapidly perform the crosslinking reaction. The catalyst is not particularly limited as long as it is a catalyst usually used in a crosslinking reaction (resin processing). For example, boron fluoride such as ammonium borofluoride, sodium borofluoride, potassium borofluoride, zinc borofluoride and the like. Examples include compounds, neutral metal salt catalysts such as magnesium chloride, magnesium sulfate, and magnesium nitrate, and inorganic acids such as phosphoric acid, hydrochloric acid, sulfuric acid, sulfurous acid, hyposulfite, and boric acid. These catalysts can be used in combination with organic acids such as citric acid, tartaric acid, apple acid and maleic acid as a co-catalyst, if necessary.

  5-50 mass% is preferable with respect to a crosslinking agent, and, as for the usage-amount of the said crosslinking catalyst, More preferably, it is 10-20 mass%. If the amount of the catalyst used is too small, the crosslinking reaction may not proceed, and if it is too large, the fabric may be deteriorated.

  Moreover, the auxiliary | assistant for advancing reaction of a cellulose and a crosslinking agent smoothly can be added to a crosslinking agent as needed. That is, the auxiliary agent has an action as a reaction solvent that promotes the reaction between the crosslinking agent and cellulose, or promotes the reaction even in the crosslinking formation reaction, and further has an action of swelling the cellulose.

  Examples of the auxiliary agent include polyhydric alcohols such as glycerin, ethylene glycol, polyethylene glycol, and polypropylene glycol, ethylene glycol monoethyl ether, diethylene glycol monoethyl ether, ethylene glycol monomethyl ether, diethylene glycol monomethyl ether, and diethylene glycol monobutyl ether. Nitrogen-containing solvents such as ether alcohols, dimethylformamide, morpholine, 2-pyrrolidone, dimethylacetamide, N-methylpyrrolidone, ethyl acetate, isopropyl acetate, butyl acetate, amyl acetate, ethylene glycol monomethyl ether, ethylene glycol monoethyl acetate Examples thereof include esters such as ether and γ-butyrolactone.

  In addition to the above-mentioned agents, a softening agent for adjusting the texture, a formalin catcher for reducing free formalin concentration, a surfactant as a penetrating agent, and the like are added to the crosslinking agent of the present invention as necessary. You can also.

  In the present invention, the crosslinking agent and the crosslinking catalyst are applied to the cellulosic fiber-containing fabric, but the application method is not particularly limited, and a normal pad / dry method, coating method, spray method, gas phase reaction (VP reaction) method, etc. These known methods can be employed.

  In the pad-dry method, after the fabric is immersed in a treatment solution containing a crosslinking agent and a crosslinking catalyst, the squeezing rate is, for example, 50 to 120% so that the amount of the crosslinking agent and the catalyst is attached to the fabric in the above-described range. It is preferable to squeeze and dry the moisture at an ambient temperature of about 70 to 120 ° C. for about 1 to 3 minutes. If the atmospheric temperature is less than 70 ° C., a long drying time is required, and if it exceeds 120 ° C., migration of the cross-linking agent occurs, which may cause inconveniences such as uneven distribution of the cross-linking agent.

After the treatment liquid containing the crosslinking agent and the catalyst is applied to the fabric, the moisture content of the fabric is adjusted to be within a certain range. Here, the moisture content is expressed by the following formula from the weight (W ₁ ) of the fabric after moisture adjustment and the weight (W ₀ ) before adjustment (after application of the crosslinking agent):
Moisture content = {(W ₁ −W ₀ ) / W ₀ } × 100 (%) (25 ° C., 65% RH)
This is a value obtained using, and the adjustment / measurement method is as described later.

  In this case, the water content is preferably adjusted to 5 to 30%, more preferably 10 to 20%.

Next, contact heat treatment is performed to complete the crosslinking reaction. Here, the contact-type heat treatment is a treatment at a constant temperature and a constant pressure. Specifically, the contact-type heat treatment can be performed using a compression / shrinking machine, a high-pressure press, a flat plate press, or the like. As the compression / shrinking machine, one utilizing the extension of the rubber belt by compression, one utilizing the difference in surface speed between the two rollers, etc. can be used, and the compression / shrinkage rate is 1 to 5%, particularly 1 to 3%. A fabric can be obtained. The compression / shrinkage ratio is a value measured by a method specified in JIS L-0217 (Method 103). In this case, the pressure applied to the fabric in the contact heat treatment is preferably 0.5 to 2.0 kgf / cm ² , more preferably 1.0 to 2.0 kgf / cm ² in any method.

  The fabric is preferably heat-treated at a temperature of 120 to 170 ° C., more preferably 130 to 160 ° C., preferably for 5 to 30 seconds, more preferably for 15 to 30 seconds, to generate crosslinks between cellulose molecules. The temperature and time of this heat treatment depend on the type of crosslinking agent to be added, the amount of crosslinking agent used, the type of catalyst, the amount of catalyst used, etc., but if the heat treatment temperature is less than 120 ° C., the reaction progress may be slow, If the temperature exceeds ℃, the fabric may be inconvenient such as yellowing. In addition, if the treatment time is less than 5 seconds, the reaction may not proceed sufficiently, and if it exceeds 30 seconds, there may be a problem such as yellowing of the dough.

  In the present invention, after the moisture content of the fabric is adjusted to a certain range, the contact-type heat treatment is performed, and the cellulose molecules are cross-linked under high humidity and high pressure. Advantages such as enhancing the form stability performance such as fender resistance and W & W properties without causing a decrease occur.

  The fabric obtained by heat treatment can be subjected to dyeing, raising, soft finishing, etc., if necessary, after washing with hot water.

  The cellulosic fiber-containing fabric obtained by the method of the present invention is excellent in balance between anti-mold and improvement in W & W performance, fabric strength and whiteness reduction, and can be widely used as various products such as clothing products.

  EXAMPLES Hereinafter, although an Example and a comparative example are shown and this invention is demonstrated concretely, this invention is not restrict | limited to the following Example.

[Example 1]
A 148 × 70 (inch / inch) plain structure machine consisting of 100% warp cotton and 50% weft cotton and 40th weft was scoured, bleached and mercerized according to a conventional method.
The above-mentioned woven fabric was treated with a no-formaldehyde-based crosslinking agent-containing treatment liquid (aqueous dispersion) prepared at a blending ratio shown in Table 1 below by a pad-dry method (squeezing rate 60%, 110 ° C., 1 minute).

Next, the moisture content of the woven fabric was adjusted to 20%. The moisture content was adjusted and measured by the following method.
First, moisture was given with a steamer, and the moisture content was measured with a moisture meter (manufactured by Marlo) in front of Palmer (25 ° C., 65% RH). As the moisture meter, a β-ray use weight measuring device was used. The moisture imparted by the steamer can be adjusted to a desired moisture content at temperature and time, and treated at 100 ° C. for 1 minute to obtain a woven fabric having the above moisture content.

The moisture adjusted fabric was pressed at 160 ° C. for 20 seconds under a pressure of 1 kgf / cm ² using a flat plate press (manufactured by Kobe Electric Industry Co., Ltd.). After that, it was washed with hot water at 80 ° C., using a softener (Nikka Silicon AMC800E (manufactured by Nikka Chemical Co., Ltd.), Finetex PE140 (manufactured by Dainippon Ink and Chemicals)), and a pad-dry method (squeezing rate). : 60%, 25 ° C).

[Comparative Example 1]
Treat in the same manner using the same fabric as in Example 1, apply the treatment solution to the fabric by the pad-dry method, bake at 160 ° C. for 20 minutes, then wash in hot water as in Example 1 and soften the fabric. did.

The properties of the fabrics obtained in Example 1 and Comparative Example 1 were evaluated by the following methods. The results are shown in Table 2.
Wash & Wear (W & W) Property; JISL-1096 A Method Tensile Strength (Weft); JISL-1096 Labeled Strip Method Tear; JISL-1096 Method D (Pendulum Method)
Antifungal property; JISL-1096 Method B (Monsanto Method)
Whiteness: JISL-0803 Measurement of whiteness

[Example 2]
A 147 × 76 (inch / inch) plain machine made of 47% polyester, 53% cotton and 50 counts for both warp and weft was scoured, bleached and mercerized by conventional methods.
The low formaldehyde-based crosslinking agent-containing treatment liquid prepared at the blending ratio shown in Table 3 below was treated with the pad / dry method in the same manner as in Example 1 to adjust the moisture content of the fabric to 20%.

The woven fabric whose moisture content was adjusted was pressed at 150 ° C. for 20 seconds under a pressure of 1 kgf / cm ² using a flat plate press, and then washed with hot water and softened in the same manner as in Example 1.

[Comparative Example 2]
Treated in the same manner using the same fabric as in Example 2, and after applying the treatment liquid to the fabric by the pad-dry method, heat treated by a pin tenter at 150 ° C. for 90 seconds, and then washed in hot water as in Example 2. Flexible processing.

  With respect to the fabrics obtained in Example 2 and Comparative Example 2, the properties were evaluated in the same manner as in Example 1. The results are shown in Table 4.

Claims (5)

  After a treatment liquid containing a crosslinking agent and a crosslinking catalyst is applied to a cellulosic fiber-containing fabric, the moisture content of the fabric is adjusted to be constant, and then a cross-linking reaction is performed under wet heat and high pressure by contact-type heat treatment. A method for processing a cellulosic fiber-containing fabric.   The method for processing a cellulosic fiber-containing fabric according to claim 1, wherein the moisture content of the fabric is adjusted to 5 to 30%. Method of processing cellulosic fiber-containing fabric of the processing pressure in the contact type heat treatment is 0.5~2.0kgf / cm ² according to claim 1 or 2, wherein.   The processing method of the cellulosic fiber-containing fabric according to claim 1, 2, or 3, wherein a treatment time in the contact heat treatment is 5 to 30 seconds. A cellulosic fiber-containing fabric obtained by the processing method according to any one of claims 1 to 4.