KR900007095B1 - Finishing method for lossin weight of cellulosic fabric - Google Patents

Abstract

A finishing method for losing a wt. of cellulosic fabric comprises dipping a cotton fabric to into bath of pH 4.5-5.5 mixed water of water and organic acid, and dipping the cotton fabric into the bath of a finishing soln. of water and 0.2-1 wt.% cellulase at 40-60 deg. C for 8-24 hr. and decomposing-removing a hemicellulose from the fabric.

Description

Reduction of Cellulose Fabrics

1 is an embodiment of the present invention by the Jigger method.

2 is an exemplary embodiment of the present invention by a pad-batch method.

3 is an embodiment of the present invention by a liquid dyeing machine.

* Explanation of symbols for main parts of the drawings

1: immersion roller 2,3: winding roller

5,7,15: Treatment solution 10: Squeeze roller

11: reactor

The present invention relates to a method for weight reduction of cellulose-based fabrics using cellulase enzymes.

Conventionally, there has been a weight loss processing method using caustic soda only for synthetic fibers, and no weight loss processing method for cellulose-based fabrics such as cotton fabrics has been provided. The cotton yarn is composed of cellulose (cellu1ose), but the enlarged cross-sectional structure of the cotton yarn shows that a hemi-cellulose layer is formed on the epidermal part of the cellulose in which the hollow part is formed. Cellulose is excellent in hygroscopicity and dyeability, and the texture is very soft. However, hemi-cellulose in the epidermis receives a lot of external stimuli during the growth process.

Therefore, it is because of this hemi-cellulose that the cellulose-based fabrics such as cotton hemp and silk fabric are generally rough and not soft, and hemi-cellulose is only about 18.5% of the total cotton yarn. Back cellulose fabrics are highly hygroscopic and breathable, the surface is smooth, and the texture is very soft.

Therefore, in the present invention, the cellulose-based fabric is reduced by an appropriate amount as required by the cellulose degradation of the cellulase enzyme, so that the cellulose in the epidermal layer is removed.

In other words, an appropriate amount of cellulase enzyme is added to the water having a proper acidity to obtain a treatment solution, and the temperature of the treatment solution is 40 ° C. to 60 ° C. so that the activity of the enzyme is actively performed. Absorption is appropriately reduced by the decomposition of cellulase enzyme for a certain time, and then heated to a high temperature to remove residual enzyme.

An embodiment of the present invention will be described in detail with reference to the accompanying drawings.

EXAMPLE

Figure 1 is a schematic diagram of the jigger mlc (A) is guided to the immersion roller (1) and wound on the winding roller (2) (3) is 100% cotton fabric (4) about 200kg 100g / yd ² )to be.

Approximately 500 liters of water is added to the bath and organic acid (glacial acetic acid) is added to maintain the acidity of P · H 4.5 to 5.5. To be. When water is absorbed evenly by 200kg of cotton cloth (4), about 300l of water is left in the bathtub. That is, 200 l of water is absorbed into the cotton fabric 4.

Cellulase enzyme was added to the water in the bath at 0.2 to 1% (weight ratio to water) to form the treatment solution (5), and the temperature of the treatment solution (5) was 40 ° C by indirect heating by the steaming method. Rotating the take-up rollers (2) and (3) to the left and right while keeping the -60 ° C to immerse the cotton fabric (4) in the treatment solution (5) for about 8-24 hours causes the cellulase element to become active and hemi- Decomposing and removing cellulose will result in a 10-20% (OW F) reduction.

In the present invention, the water is absorbed into the cotton fabric 4 before the cellulase enzyme is added, so that the treatment solution 5 is more evenly absorbed after the cellulase enzyme injection, so that the weight loss is uniform in the front fabric. Keeping the temperature of (5) at 40 ° C.-60 ° C. and maintaining the acidity of P · H 4.5-5.5 is to provide conditions for the activity of the cellulase enzyme to be most active.

In addition, after a certain amount of weight loss after the appropriate heating by heating to remove the residual enzyme to complete the weight loss processing.

The present invention can also adjust the weight loss effect by adjusting the enzyme dose or immersion time.

In the present invention, the cellulase enzyme does not necessarily decompose and reduce only hemi-cellulose, but also decomposes cellulose, so that the thread is very thick or, if necessary, can be appropriately reduced to cellulose to obtain a predetermined effect.

The reduction effect according to the change of enzyme input or immersion time is shown in Table (1) (2) below.

Cellulose Reduction by Cellulase Enzyme Treatment

* (Feel improvement)

(A) Acidity: 4.5 Temperature: 12 hours treatment at 50 ° C

(B) Acidity: 4.5 Temperature: 6 hours at 50 ° C

Reduction ratio (%) under various conditions (temperature, time, concentration)

Treatment sample: 100% cotton 230T

The weight reduction processing method by the jiggering method described above is a suitable method when mainly reducing a small amount. When weight loss processing in large quantities, it is better to use the pad-batch method as shown in FIG.

The weight loss processing method by the pad-batch method is as follows.

Put the treatment solution (7) mixed with water and cellulase enzyme in the padding bath (6) and the work piece (9) wound on the winding roller (8) passes through the immersion roller (8). 6) Ensuring that the treatment solution 7 inside is sufficiently absorbed (1DIP) and squeezed properly in the squeeze roller 10 so that the absorbed treatment solution is evenly spread over the fabric 9 (1NIP). When wound around the winding roller 12 and maintained at an appropriate temperature for a predetermined time by an indirect method by steaming, hemi-cellulose is decomposed and removed by the decomposition of the cellulase enzyme to obtain a predetermined reduction effect. When the weight loss is achieved, the weight loss process is completed by heating the residue at 100 ° C for 10 to 15 minutes to remove residual enzyme.

As a method for reducing a small amount by the method of the present invention, in addition to the processing method according to the jiggering method, a method using a liquid dyeing machine may be performed as in FIG. 3, and specific examples thereof are as follows.

[Example by liquid dyeing machine]

When cotton cloth acetic acid (13) is based on 2,000 kg, 1,500 l of mole is added to the bath 14 of the liquid dyeing machine (C) to maintain the acidity of P · H 4.5 to 5.5 and the cotton fabric 13 is rotated to absorb water. Then, the treatment solution (15) obtained by adding 0.2% to 1% (weight ratio to water) of cellulase enzyme was brought to a temperature of 40 ° C to 60 ° C by indirect heating, and the cotton fabric 13 was subjected to 8 to 24 hours. When the treatment solution 15 is sufficiently absorbed by rotation, the reduction effect of about 10 to 20% (OWF) is obtained as in the jiggering method. same. When the hemi-cellulose is decomposed and removed by the above-described weight reduction method, all fine hairs of the fiber are removed at the same time, so that the texture of the fabric is very soft, hygroscopic, breathable, and smooth.

Claims (2)

A method of processing a cellulose based fabric in which a treatment solution obtained by incorporating a cellulase enzyme in water having an acidity is absorbed by a heating hag fabric to be reduced. The method for reducing or reducing the cellulose-based fabric according to claim 1, wherein the treatment solution obtained by adjusting the acidity of the water to pH 4.5-5.5 and the enzyme dose of 0.2-1% (weight ratio to 뭍) is heated to 40 ° C-60 ° C. .

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