JPH07189135A - Processing method for cellulose-based sewn product - Google Patents

Abstract

PURPOSE:To provide a processing method capable of producing a sewn product consisting mainly of flexible cellulose-based textile fabric good in form stability with washing durability. CONSTITUTION:An organic compound cross-linkingly reactive with cellulose such as formaldehyde is reacted in a vapor state with a sewn product consisting mainly of cellulose-based textile fabric subjected to no resin finishing, and the resultant sewn product is then subjected to cellulase treatment to such an extent as to decrease the mechanical strength of the cellulose fibers by 10-30%.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for processing a cellulosic fiber sewn product.

[0002]

2. Description of the Prior Art Cellulose fiber cloths such as cotton and rayon are processed with resin for the purpose of imparting shrinkage resistance and wrinkle resistance.
Although a method for manufacturing a sewn product using this has been generally used for a long time, there has been a problem in the shape stability of the sewn product due to the expansion and contraction of the sewn material and improper adjustment that occur during sewing.

In order to improve this morphological stability, in recent years,
Vapor-phase processing method for sewn products with formaldehyde gas (US
P3738019, USP3884632, USP3960482, USP4067688, JP-A-5-117958, etc.) have been proposed. this is,
This is a processing method in which a sewn product is sewn without directly subjecting the cellulosic fiber cloth to resin processing, and formaldehyde is reacted with the sewn product in a gas phase state. According to this vapor-phase processing method, the sewn product is fixed to the resin in the sewn state, so the morphological stability of the sewn product is very good, but the hardening of the texture due to the resin fixing can be avoided. However, even if the softening agent was applied, only the softening effect with poor durability was obtained.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and is a cellulosic fiber cloth which has good morphological stability of a sewn product and is durable enough to be washed. The object is to obtain a sewn product consisting of

[0005]

SUMMARY OF THE INVENTION The present invention achieves the above object and has the following configuration. That is, according to the present invention, a cross-linkable fibrin-reactive resin is allowed to react in a gas phase state with a sewn product mainly composed of a cellulosic fiber cloth which has not been resin-treated, and thereafter the sewn product is provided with a strong strength of the cellulose fiber. The gist is a method for processing a cellulosic fiber sewn product, which is characterized by subjecting a cellulolytic enzyme treatment to an extent of a decrease of 10 to 30%.

The present invention will be described in detail below.

In the present invention, a sewn product mainly composed of a cellulosic fiber cloth which is not resin-processed is used as a processing object.

The sewn product mainly composed of the cellulosic fiber cloth here means a sewn product composed of a knitted fabric or a woven fabric mainly using natural cellulose fibers such as cotton and hemp, and regenerated cellulose fibers such as rayon and polynosic, It is desirable that the mixing ratio of these is 50% or more, and of course, 100% of these natural fibers and regenerated fibers may be used.
This is because the effect of the present invention can be remarkably seen when the mixing ratio is 50% or more.

Here, the sewn product means a sewn product obtained by ordinary sewing, such as a polo shirt, training wear, and casual wear.

In the method of the present invention, first, the above-mentioned sewn product is reacted with the crosslinkable fibrin reactive resin in the vapor phase. This process is called vapor phase processing.

The crosslinkable fibrin reactive resin referred to here is
As represented by formaldehyde, acetaldehyde, etc., it means an organic compound having reactivity with fibrin and having crosslinkability between cellulose molecules. Normally, formaldehyde is used for processing in terms of economy.

In the vapor phase processing, the moisture content of the cloth constituting the sewn product is adjusted uniformly. At this time, the moisture content of the dough must be 1 to 50%, and the moisture must be evenly distributed in the dough. If the moisture content of the dough is 1% or less, the formaldehyde gas used in the next step will not be sufficiently adsorbed to the dough, and if it is 50% or more, the acid catalyst may cause embrittlement of the dough. Be careful. In addition, if moisture is not evenly distributed in the dough, formaldehyde gas will not be adsorbed uniformly.

Any means may be used to adjust the water content uniformly, but it is usually preferable to leave the cloth or sewn product in a constant temperature and constant humidity chamber for 24 hours or more.

After adjusting the moisture content, the sewn product is vapor-phase processed with formaldehyde.
A vapor phase processing apparatus manufactured by ATP (American Textile Processing Co.) can be used.

The formaldehyde gas concentration in this vapor phase processing apparatus is preferably in the range of 1 to 20%, and when it is 1% or less, the crosslinking reaction becomes insufficient, and even when it is 20% or more, the effect is not obtained. It won't work anymore.

The catalyst used for the cross-linking reaction may be prepared by padding the cloth with the catalyst solution in advance, and may be subjected to gas phase processing. Alternatively, the catalyst solution or the liquefied catalyst may be vaporized to form the cloth. It may be adsorbed.

Regarding the kind of the catalyst, when the catalyst is padded in advance, the same catalyst as used in conventional resin processing, for example,
There are metal salts of acids such as zinc nitrate, Lewis acids and Bronsted acids. Further, when vaporizing, a volatile acid having a low boiling point such as hydrogen chloride is desirable.

When treating with a gas, the catalyst concentration is preferably in the range of 0.1 to 3.0%. Gas concentration is 0.1%
If it is less than the above range, the crosslinking reaction will be insufficient, and even if it exceeds 3.0%, the effect will no longer increase. When the catalyst is padded with an aqueous solution and attached, the catalyst concentration is 5 to
A range of 100 g / liter is desirable. If the concentration is less than 5g / liter, the crosslinking reaction will be insufficient and 100g
Even if it exceeds liter / liter, the effect does not increase any more.

After adsorbing the formaldehyde gas, the cloth is heat treated to carry out a crosslinking reaction.
The crosslinking reaction can be completed by performing the treatment at a temperature in the range of 0 to 180 ° C. for 0.5 to 10 minutes.

Next, in the present invention, the garment product after the vapor phase processing is subjected to a cellulolytic enzyme treatment to the extent that the strength of the cellulosic fibers is reduced by 10 to 30%.

The cellulolytic enzyme used here may be cellulase or a cellulase-containing drug, and specific commercially available products include celluclast 1.5L.
(Novo Nordisk Bio Industry Co., Ltd. product), Enchiron CM-40 (Product of Tohto Kasei Co., Ltd.), Cell riser (Product of Nagase Seikagaku Co., Ltd.) and the like can be mentioned.

The enzyme treatment may be carried out by appropriately selecting the concentration of the enzyme solution and the treatment temperature according to the treatment conditions specified by the manufacturer of the commercial product to be used, but the important point in the present invention is the treatment. It is a time setting. When setting the treatment time, the same kind of cloth is appropriately used in advance, and the treatment time is distributed on the beaker scale every 5 minutes, 10 minutes, and 15 minutes, and the strength of the cellulosic fiber is 10 to 10.
It is advisable to set the actual processing time after determining the processing time that will decrease by 30%.

In treating the sewn product with an enzyme, it is preferable to use a rotary washing device such as a washer and to use a rotary dryer such as a tumbler also in the drying step in terms of the feel of the sewn product.

The present invention has the above configuration.

[0025]

[Operation] When a crosslinked fibrin-reactive resin is made to react in the gas phase with a sewn product made of cellulosic fiber cloth, the resin is fixed in the sewn condition, so the morphological stability of the sewn product is very good. When a sewn product in such a state is subjected to a cellulolytic enzyme treatment such that the strength of the cellulosic fiber is reduced by 10 to 30%, a part of the cellulose molecule is decomposed by the cellulolytic enzyme to form a sewn product. The present inventor speculates that since the structure of the cloth and the voids are formed between the fibers to increase the degree of freedom of the fibers, the softening is realized. Furthermore, when a rotary washing device or a dryer is used during the enzyme treatment, a kneading effect can be given to the sewn product, so that a further softening effect can be obtained.

[0026]

EXAMPLES Next, the present invention will be described in more detail with reference to Examples. Measurement and evaluation of the performance of the fabrics in Examples were carried out by the following methods. (1) Bursting strength Measured according to JIS L-1018. (2) Shrinkage rate The wash shrinkage rate was measured according to JIS L-1042. (3) Morphological stability Samples after processing and JIS L-0217 (103 method,
With respect to the sample after 5 times of repeated washing by tumble drying, the shape retention was visually judged, and the following 3 grades were relatively evaluated. Good: Good Good Fair: Somewhat bad X: Poor (4) Flexibility Samples after processing and JIS L-0217 (103 method,
With respect to the sample after 5 times of repeated washing by tumble drying), the softness of the feeling was relatively evaluated by the following three grades by the tentacle (handling). ○: Soft △: Slightly hard ×: Hard

Example 1 100% cotton scoured and bleached by a conventional method, a 40-count-use tenjiku knit (weight per unit area: 200 g / m ² ) was prepared, and a casual shirt was sewn using this cloth, and then 20 ℃,
Leaving it in an environment room of 65% RH will give a moisture content of 8.0.
%, And then, using a vapor phase processing apparatus manufactured by American Textile Processing, vapor phase processing was performed according to the following prescription 1. Prescription 1 Formaldehyde gas concentration 7.0% (volume fraction) Sulfurous acid (catalyst) concentration 2.0% (volume fraction)

Next, the following Formulation 2 was confirmed in advance by a preliminary experiment so that the strength reduction (burst strength) was 26% (45 ° C., 45 minutes), and then the following Formulation 2 was used at 45 ° C. using a washer. The enzyme treatment was performed for 45 minutes. Prescription 2 Cell crust 1.5L 1.7g / liter (Novo Nordisk Bioindustry, cellulolytic enzyme) Acetic acid 1.0g / liter Sodium acetate 2.0g / liter

After the enzyme treatment, it was dried at 60 ° C. for 30 minutes using a tumbler to obtain a sewn product of the present invention.

COMPARATIVE EXAMPLE 1 The scoured and bleached Tenjiku knit used in Example 1 above was sewn as it was, and used as a sample for comparison.

COMPARATIVE EXAMPLE 2 The scoured and bleached Tenjiku knit used in the above Example 1 was used as a fabric to be processed, and it was first immersed in an aqueous solution shown in the following Formulation 3 according to the conventional method (sewn after resin processing). After squeezing with a mangle at 100% squeezing rate, use a tenter at 110 ° C for 2
After drying for 1 minute, heat treatment was performed at 160 ° C. for 2 minutes. Prescription 3 Sumitex Resin NS-19 40 g / liter (Sumitomo Chemical Co., Ltd., glyoxal resin) Sumitex Accelerator X-80 12 g / liter (Sumitomo Chemical Co., Ltd., inorganic metal salt catalyst)

Next, it was dipped in an aqueous solution of a softening agent shown in the following Formulation 4, squeezed with a mangle at a squeezing rate of 100%, and dried in a tenter at 110 ° C. for 2 minutes.
The same casual shirt was sewn as a sample for comparison. Prescription 4 Vicron 55R 30g / liter (one side company Yushi Kogyo Co., Ltd., lanolin, polyhydric alcohol ester, polyamide derivative)

The performances of the present invention and the sewn product for comparison were measured and evaluated, and the results are shown together in Table 1.

[Table 1]

As is clear from Table 1, the sewn product obtained by the method of the present invention was a sewn product having good morphological stability and having wash durability. Furthermore, even when a wearing test was actually conducted and washing and wearing were repeated, the good feeling of the present invention was not impaired as compared with the durability of general softening agents.

[0035]

According to the present invention, the morphological stability is good,
In addition, it is possible to obtain a sewn product that has washing durability and has a softening effect.

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Claims (1)

[Claims] 1. A cross-linkable fibrin-reactive resin is allowed to react in a gas phase with a sewn product mainly composed of a cellulosic fiber cloth which has not been resin-processed, and then the sewn product has a cellulose fiber strength of 10%. A method for processing a cellulosic fiber sewn product, which comprises subjecting a cellulolytic enzyme treatment to an extent of a decrease of -30%.