JPH03213574A - Modification of zootic hair fiber - Google Patents

Abstract

PURPOSE:To modify shrink resistance, resistance to pilling and hydrophobic properties of zootic hair fibers without losing feeling by crosslinking the cuticle part of zootic hair fibers in treating with enzyme. CONSTITUTION:Zootic hair fibers such as wool or cashmere are modified by crosslinking the cuticle part in treating with enzyme [e.g. trans-glutaminase derived from a microorganism belonging to streptoverticillium].

Description

DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to a method for modifying animal hair fibers in which shrink-proofing properties and hydrophobicity are modified while maintaining animal hair-like texture.

<Prior art and its problems> Animal hair fibers have the drawback of shrinking significantly and becoming felt when washed at home, and various anti-shrunk processing methods have been developed to improve this problem. The shrink-proofing method is usually the following 1.
) to 4) are available.

1) A method in which the cuticle of animal hair fibers is removed using a chlorinating agent such as sodium hypochlorite or sodium dichloroisocyanurate, and an oxidizing agent such as monopersulfuric acid or potassium permanganate.

2) A method in which the cuticle of animal hair fibers is treated with chlorine and other agents in 1) and then coated with polyamide shrimp chlorohydrin resin.

3) A method of coating the cuticle of animal hair fibers with a synthetic polymer.

4) Methods of reducing the anisotropy of the coefficient of friction on the fiber surface, such as low-temperature plasma treatment and corona discharge treatment.

Methods 1) and 2) above are shrink-proofing methods that are currently widely used, but they have the drawback of being accompanied by a decline in the performance of treating with chlorinating agents and oxidizing agents. Regarding method 3), in order to obtain satisfactory shrink-proofing properties, the processing form is limited to the processing of animal blankets;
Moreover, it has the disadvantage that the texture is poor. Also 4)
The use of this method is still limited.

In addition, the physical properties of the fibers gradually change as they are worn. There is a problem that the problem occurs.

<Problems to be Solved by the Invention> The present invention was made in view of the above-mentioned problems, and by treating animal hair fibers with enzymes, it is possible to achieve shrink-proofing, anti-pilling, and hydrophobic properties while maintaining the texture of animal hair. The purpose is to give gender.

<Means for Solving the Invention> As a result of intensive research in order to solve this problem, the present inventors have found that by treating animal hair fibers with enzymes to partially crosslink the cuticle of animal hair, The present invention was completed based on the discovery that animal hair fibers having excellent shrink-proofing properties, anti-pilling properties, and hydrophobicity can be obtained while maintaining a hair-like texture. That is, the present invention uses animal hair 11
This is a method for modifying animal hair fibers, which is characterized by treating the A-fibers with an enzyme to crosslink the cuticle region.

The present invention will be explained in detail below.

In the present invention, the animal hair WC cord refers to natural keratinous fibers obtained from animals such as sheep, cashmere, mohe, angora, camel, and albaca, and the fiber form may be animal hair alone or animal hair. Sliver yarn, knitted fabric, non-woven fabric, etc. containing at least 15% animal hair, etc.

The enzyme used in the present invention specifically selects and reacts with the functional groups of amino acids or amino acid derivatives in the cuticle region of animal hair to cause crosslinking. Typical examples of enzymes used include transglutaminase and lysyl oxidase. The transglutaminase that can be used in the present invention is not particularly concerned with its origin; for example, Streptoverticillium (Streptoverticillium)
microorganisms (B.
It is sometimes abbreviated as TGase. JP-A-64-274
71), those derived from chewing mammals such as guinea pigs (see M
It is sometimes abbreviated as TGase. Japanese Patent Publication No. 58-149
64), those derived from fish such as cod (Nobuo Seki et al.
(Refer to page 167 of the 3rd Annual Japanese Fisheries Society Autumn Conference Abstracts), including those obtained by scene cloning using biotechnology. Lysyl oxidase is partially purified from chicken embryo tissue and can catalyze the oxidation reaction of lysine and hydroxylysine.
Crosslinks can be introduced into collagen.

Furthermore, in the fiber modification method of the present invention, enzymes are added to water (
Dissolve or suspend the enzyme in a solution containing a buffer solution or a mixed solution of water and a water-soluble organic solvent so that the temperature of the enzyme is 1X10-' to 10%, and 0°C to 70°C, preferably 10 to 10%.
The fibers are soaked and reacted at 50°C. Depending on the type of enzyme, a promoter may be added. After the reaction, the animal hair fibers can be modified by washing with water and drying.

<Effect> When animal hair fibers are treated with enzymes, it is possible to impart excellent shrink-proofing properties, anti-pilling properties, and hydrophobicity to the animal hair fibers while maintaining the animal hair-like texture. This is because enzymes selectively crosslink the functional groups of amino acids in the cuticle of animal hair fibers, improving 5-hydrophobicity, reducing changes in the cuticle when wet, and leaving other parts completely unreacted. it is conceivable that.

<Example> The present invention will be explained in detail below with reference to Examples.

Example 1 A plain knitted fabric with a cover factor of 0.41 was created by aligning two 2/48 stockinette yarns on a 100 flat knitting machine.
It was washed with hot water at 40'C for 15 minutes and dried. Next, BTGa
SEO, 5g was dissolved in 11 water, the wool knitted fabric prepared above was immersed in this aqueous solution, reacted for 2 minutes at 20-30°C, washed with water and dried.

Using the processed wool knitted fabric thus obtained, fiber performance was evaluated by the following test method.

(1) Shrink-proof property IWS TM31 After performing relaxation shrinkage of 7A using the weskator test method, 5-A felt shrinkage was performed, and the 6-% area shrinkage was determined from the dimensional change of the sample to evaluate the shrink-proof property.

(2) Hydrophobic JIS LlolB, 5.27.1. According to Law B, 2.
The lower end of a knitted fabric with a size of 5 x 20 cm was immersed in distilled water at 20°C for 2 hours, and the evaluation was made by measuring the height of the water rising.

(3) Pilling resistance was evaluated using a CI type tester according to JIS L1076 A method.

Table 1 shows the results.

7-Table 1 Table 1 shows that treatment with BTGase provides excellent shrink-proofing properties, anti-pilling properties, and hydrophobicity.

81 Example 2 A sliver of Australian No. 66 Merino wool was preliminarily treated with 3.5% sodium dichloroisocyanurate.
Add w, f, and soak for 25 minutes at 25°C. After washing with water,
Add sodium sulfite 10.0% o, w, f, 35
After processing at °C for 15 minutes, the wool was thoroughly washed with water to obtain an oxidized wool sliver. This was processed in the same manner as in Example 1. Using the processed wool knitted fabric thus obtained, fiber performance was evaluated by the following test method.

(1) Shrink resistance It was carried out in the same manner as in Example 1.

(2) Hydrophobic JIS L1018.5.27.1. In accordance with Law B, 2.
The lower end of a knitted fabric with a size of 5 x 20 cm was immersed in distilled water at 20°C for 10 minutes, and the evaluation was made by measuring the height of the water rising.

The results are shown in Table 2.

9-Table 2 Table 2 shows that even oxidized wool has excellent shrink-proofing properties and hydrophobicity when treated with BTGase.

10- <Effects of the Invention> According to the present invention, modified animal hair fibers with excellent shrink-proofing properties, anti-pilling properties, and hydrophobicity can be obtained by treating fibers with enzymes without impairing the texture of the animal hair fibers. I can do it.

Claims (1)

[Claims] A method for modifying animal hair fibers, which comprises treating the animal hair fibers with an enzyme to crosslink the cuticle region.