JPH0657628A - Modification process for animal hair fiber structures - Google Patents

Abstract

PURPOSE:To provide the processing process comprising treatment of an animal hair fiber structure with a solution containing proteinase and treatment of the product with microwaves under wetted conditions. CONSTITUTION:The resultant animal hair fiber structure has outstanding touch and dyeability and is very useful in the casual application where it can be used even in the applications where the conventional animal hair fiber structures could not be used. Further, the modification can be finished by means of heat in a shortened time, and the needed energy, water and costs are markedly saved.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for modifying and processing animal hair fiber structures, and more particularly to a method for modifying and processing animal hair fiber structures which are excellent in texture and dyeability.

[0002]

2. Description of the Related Art Animal hair is said to be the most ideal fiber among natural fibers and synthetic fibers. this is,
This is because, even though the cuticle on the surface exhibits water repellency and repels water, the cortex inside has hydrophilicity and thus exhibits hygroscopicity and water absorption. Therefore, animal hair has been processed as much as possible without modification to make the most of the material, but in recent years, in order to respond to the diversification and individualization of life,
The development of high added value has been demanded.

Therefore, as one of the modification methods for imparting various functions to the animal hair fiber itself, a method of treating with a proteolytic enzyme to improve the feeling and the dyeability has been proposed. Conventionally, regarding the modification of animal hair fibers with a proteolytic enzyme, a batch method using a Wins dyeing machine, a beam dyeing machine or the like has been conventionally performed, and a continuous method such as a pad steam method or a pad-cure method has not been performed. This is because the proteolytic enzyme is inactivated by the moist heat treatment or the dry heat treatment at 100 ° C. or 100 ° C. or more, and a sufficient modifying effect cannot be obtained. However, the proteolytic enzyme treatment by the batch method has a problem that the productivity is not improved, and further, there is a problem that the feeling and the dyeability are different between lots, and it is desired to solve the problem.

[0004]

DISCLOSURE OF THE INVENTION The inventors of the present invention have conducted extensive studies on the improvement of animal hair fiber structures by proteolytic enzymes, and as a result, a new improved method in which the problems of the existing methods have been solved. The inventors have found the present invention and completed the present invention. An object of the present invention is to provide a method for continuously modifying and processing animal hair fiber structures having excellent texture and dyeability.

[0005]

[Means for Solving the Problems] The above-mentioned object is a modification treatment of animal hair fiber structure characterized by subjecting the animal hair fiber structure to microwave irradiation treatment in a wet state after applying a protease to the animal hair fiber structure. Achieved by the method.

The constituent features of the present invention will be described in detail below. Examples of animal hair fibers used in the present invention include wool, cashmere, mohair, alpaca, camels, and rabbit hair. The animal hair fiber structure means raw hair, yarn, woven fabric, knitted fabric, non-woven fabric, clothes, etc. before spinning, such as roses and sliver, which are made of these animal hair fibers. Of course, these fiber structures include cellulosic fibers. It goes without saying that silk, synthetic fiber, etc. may be contained.

Examples of the proteolytic enzyme used in the present invention include bacterial proteases of microbial origin such as mold which are stable and active in alkaline, neutral and acidic regions.
The pH of the treatment liquid is used in the area where each protease is active. When it is treated with alkaline protease, it becomes brittle in strong alkali, so weak alkaline agents such as sodium carbonate, potassium carbonate, baking soda, soda ash, sodium tripolyphosphate,
Ammonium sulfate and ammonium acetate are used. If performed neutrally, a buffer solution is used. For example, potassium dihydrogen phosphate-sodium hydrogen phosphate dihydrate is used. When the acid is used, formic acid, acetic acid, sulfuric acid, oxalic acid, phosphoric acid, nitric acid, boric acid, tartaric acid, succinic acid, malic acid, oxalic acid, etc. are used. It is better to use a mixed buffer solution.

It is better to add a surfactant for more uniform penetration. Examples of the surfactant include soap, sulfated oil, sulfate ester salt of higher alcohol, sulfonated fatty acid amide or sulfonate salt of alkylbenzene or alkylnaphthalene, sulfosuccinate ester salt,
Examples thereof include condensates such as polyethylene oxide or polypropylene oxide, and fatty acid ester, alkyl ether, alkyl phenyl ether, alkyl amine, and alkanoyl amide condensates thereof.

Examples of the method for applying the treatment liquid containing the proteolytic enzyme to the animal hair fiber structure include a padding method and a spray method. And if necessary, the liquid is squeezed to a pick-up rate of 50 to 250% so that the proteolytic enzyme adheres to the fiber weight in an amount of ˜wt%. If the amount of adhesion is less than wt%, the effect is small, and if it exceeds wt%, it is not economical for the effect.

Next, the animal hair fiber structure is subjected to microwave irradiation treatment without being dried. Microwave frequency is 24
Irradiation at 50 MHz is preferable, and output is 300 to 7
00W is preferable. Regarding the irradiation timing, for example, when the output is 500 W, the aqueous solution of proteolytic enzyme is squeezed at a pick-up rate of 100 to 250%, irradiated for 2 minutes, and then repeatedly impregnated, squeezed and irradiated. The total irradiation time is 6 minutes (2 minutes repeated 3 times) to 16 minutes (2 minutes repeated 8 times), preferably 8 minutes (2 minutes repeated 4 times) to 12 minutes (2 minutes repeated 6 times). . The treated animal hair fiber is washed with water and then dehydrated.

[0011]

EXAMPLES The present invention will be specifically described below based on examples. The texture, dyeability and tenacity were measured by the following methods. (1) Feeling The bending rigidity characteristics were tested by the Kawabata type feeling test method (KES). The smaller the number, the softer it is. (2) Dyeability C.I. I. Reactive Black 5 100g
Staining was carried out by the pad dry baking method at a pH of 9 using the same method as above according to a conventional method. 630 by spectrophotometer
The K / S value in nm was measured, and the value obtained in the comparative example was 1
The density of the example when 00 is shown. (3) Strength The tear strength was measured according to JIS L-1096.

(Embodiment 1) 170 g / m ² basis weight consisting of 1/52 wool worsted warps and 1/49 wefts, density 87 × 74
30g / l of Alkaline Protease (brand name Protease "S" Amano, product of Amano Pharmaceutical Co., Ltd.)
2 g / l of baking soda and 2 g / l of nonionic surfactant (trade name amylazine D, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) After impregnation with a pick-up rate of 200%, microwaves are transmitted but steam is allowed to pass. 2450MH sealed with no film
After irradiating with a microwave generator of z for 500 W for 10 minutes (2 minutes repeated 5 times), it was washed with boiling water and dried. Figure 1
3 is a photograph showing the fiber shape of the product obtained in Example 1. Since the wool epidermis scales are peeled off and gaps are formed, the permeability of the dye is improved and the texture is also improved.

Comparative Example 1 In Example 1, the film was sealed, and the steaming treatment was performed without performing the microwave irradiation treatment. FIG. 2 is a photograph showing the fiber shape of the product obtained in Comparative Example 1. Compared with Example 1, the degree of peeling of the wool epidermis scale is less.

Table 1 shows the evaluation results of feeling, dyeing property and tenacity after the treatment of Example 1 and Comparative Example 1.

[Table 1] From Table 1, in the present invention, the strength is not significantly reduced,
A fiber having a soft texture and excellent dyeing property was obtained.

(Example 2) 30th cotton, wool worsted yarn 1 /
170 g / m 2 basis weight consisting of 52 mixed yarns (70:30)
² twill fabric with a density of 98x66 is treated with alkaline protease (trade name: Pro Leather, product of Amano Pharmaceutical Co., Ltd.) 20 g / l,
A solution containing 2 g / l of baking soda and 2 g / l of a nonionic surfactant (trade name: amylazine D, manufactured by Dai-ichi Kogyo Seiyaku Co., Ltd.) was padded and then squeezed with a pick-up rate of 170%. Seal with a non-permeable film, 2
It was irradiated with 500 W of a microwave generator of 450 MHz for 10 minutes (2 minutes were repeated 5 times), washed with boiling water and dried.

(Comparative Example 2) In Example 2, the film was sealed, and steaming was performed without performing microwave irradiation treatment.

Table 2 shows the evaluation results of feeling, dyeing property and tenacity after the treatments of Example 2 and Comparative Example 2.

[Table 2] From Table 2, in the present invention, the strength is not significantly reduced,
A fiber having a soft texture and excellent dyeing property was obtained.

The products obtained in the examples had almost the same feeling and dyeability as those obtained by the conventional batch method.

[0019]

Industrial Applicability As described above in detail, the animal hair fiber structure obtained by the method of the present invention has excellent texture and dyeing property, and is very useful for casual use. It can also be used in applications where the structure could not be used. Further, since the present invention is a reforming method of heating for a short time,
It is energy-saving and water-saving type, which is very useful for cost reduction.

[Brief description of drawings]

FIG. 1 is a photograph showing the shape of fibers of a product obtained in Example 1 of the present invention.

FIG. 2 is a photograph showing the fiber shape of the product obtained in Comparative Example 1 of the present invention.

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[Procedure amendment]

[Submission date] September 29, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0009

[Correction method] Change

[Correction content]

Examples of the method for applying the treatment liquid containing the proteolytic enzyme to the animal hair fiber structure include a padding method and a spray method. If necessary, the liquid is continuously squeezed to a pick-up rate of 50 to 250% so that the proteolytic enzyme adheres to the fiber weight in an amount of 0.05 to 30% by weight. If the amount of adhesion is less than 0.05 % by weight, the effect is small, and if it exceeds 30 % by weight, it is not economical for the effect.

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Claims (1)

[Claims] 1. A method for modifying and processing a animal hair fiber structure, which comprises applying a treatment solution containing a proteolytic enzyme to the animal hair fiber structure and then subjecting the animal hair fiber structure to microwave irradiation treatment in a wet state.