JPH04327274A - Shrink proofing method for animal hair fiber product - Google Patents

Abstract

PURPOSE:To obtain a shrink-proof fiber having shrink proofing property and excellent resistance to washing and capable of retaining soft handle having drape property by subjecting woven and knitted fabric consisting of animal hair fiber product to specific shrink proofing. CONSTITUTION:A woven and knitted fabric consisting of an animal hair fiber is subjected to low-temperature plasma treatment and then subjected to shrink proofing using e.g. blocked urethane resin and glyoxazal resin and subjected to weight reducing treatment by a proteolytic enzyme such as protease and as necessary subjected to softening treatment by an amino-modified dimethylsiloxane to provide an animal hair fiber product having shrink-proof performance and excellent washing resistance and applied in shrink proofing having soft handle.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a processing method for imparting shrink-proofing properties to animal hair fiber products that can withstand washing in a washing machine without impairing the original soft texture of the animal hair fibers.

0002

BACKGROUND OF THE INVENTION When animal hair fiber products are washed with water, they become felted due to the entanglement of the scales that make up the fiber surface and shrink significantly, so they usually cannot withstand washing in a washing machine. However, recently, technological development has progressed in this field, and currently there are two methods of shrink-proofing that can withstand washing in a washing machine: the Dylan method, which processes the fabric in its top state, the chlorinated Hercocet resin method, and the method, which processes the fabric in its state. Silorane BAP method, low-temperature plasma treatment method, etc. have been developed, and products that can actually be washed in a washing machine are now available.

[0003] As described above, although the shrink-proof properties have been considerably improved, these processed animal hair products have roughness and core, and the coreless resilience characteristic of animal hair fibers is impaired. The current situation is that it has a similar texture.

0004

[Problems to be Solved by the Invention] The present invention was made in view of the current situation, and it is an object of the present invention to provide animal hair fiber products with the soft texture inherent in animal hair fibers that has no core and has resilience and drapability. The purpose is to provide high shrink-proofing properties that can withstand 30 washes in a washing machine without damaging the fabric.

[0005]

[Means for Solving the Problems] The present invention achieves the above object and has the following configuration. That is, the present invention is characterized in that the animal hair fiber product is subjected to low-temperature plasma treatment, then subjected to an anti-shrink treatment using an anti-shrink resin, and then subjected to a weight reduction treatment of 2 to 10% by weight using a proteolytic enzyme. The gist of this article is a shrink-proofing method for hair fiber products.

The present invention will be explained in detail below. In the method of the present invention, the animal hair fiber product is first subjected to low-temperature plasma treatment. The animal hair fibers mentioned here include wool, camel, goat,
It refers to natural keratinous fibers obtained from animals such as rabbits, and animal hair fiber products include fabrics obtained by using the above animal hair fibers alone or by mixing the above animal hair fibers with other types of fibers. It refers to textile products in general, such as knitted fabrics. Examples of other types of fibers that may be mixed and used here include polyester fibers, acrylic fibers, nylon fibers, aramid fibers, polyclar fibers, and vinyl chloride fibers.

As mentioned above, animal hair fiber products are first subjected to low-temperature plasma treatment. This device has the structure and performance to introduce gas at a predetermined flow rate, evacuate the inside of the container with an attached vacuum pump, and maintain a constant pressure. When a voltage is applied to the electrodes in this device, a glow discharge occurs, and the introduced gas becomes a low-temperature plasma. Most commonly, 13
．． A high frequency power of 56 MHz is applied. Animal hair fiber products to be processed in a low temperature plasma atmosphere formed between electrodes (
A low-temperature plasma treatment can be performed by passing a cloth (such as a fabric) at a desired speed.

Specifically, the fabric to be treated is placed in a vacuum container, and the internal pressure is reduced to 0.0 by evacuating and reducing the pressure using a vacuum pump.
Adjust to 1 to 10 Torr. Next, a predetermined gas is introduced and the pressure is adjusted to 0.1 to 5 Torr. As the gas used at this time, various gases such as oxygen, nitrogen, argon, helium, ammonia, and air can be used. When high-frequency power is applied to the electrodes, the introduced gas becomes a low-temperature plasma. High frequency power is 0.1~5W
/cm2 (electrode unit area) is appropriate. By passing the fabric through this low-temperature plasma atmosphere, low-temperature plasma treatment can be performed. The processing time is usually several seconds to 300 seconds, preferably 30 to 180 seconds.

Next, in the method of the present invention, the animal hair fiber product is treated with a shrink-proof resin in order to stabilize the shrink-proof property obtained by the low-temperature plasma treatment. As the shrink-proofing resin, blocked urethane resin, polyamide epichlorohydrin resin, glyoxal resin, ethylene urea resin, acrylic ester resin, etc. can be used. The amount of the shrink-proofing resin used is preferably about 0.5 to 10% by weight based on the weight of the fibers in terms of solid content. When using anti-shrink resin, it is recommended to use a softener at the same time. As the softener, it is preferable to use amino-modified dimethylpolysiloxane because it gives a softer texture.

After applying the resin, it is dried and heat treated. The heat treatment is performed at 130 to 160°C for about 1 to 2 minutes. In order to apply an anti-shrink resin to animal hair fiber products, it is preferable to process them using a conventional continuous process.

Furthermore, in the method of the present invention, the animal hair fiber product is subjected to weight reduction processing using a proteolytic enzyme to soften the texture. Protease is used as the proteolytic enzyme. This protease has alkaline, neutral, and acidic types. It is best to use a protease that has as strong a decomposition power as possible and has a high weight loss rate. A concentration of protease used of about 0.5 to 10% by weight is sufficient. The softening effect targeted by the present invention can be obtained at a weight loss rate of 2 to 10%.

[0012] The weight reduction process is carried out by the exhaustion method, and the pH and temperature of the treatment bath may be selected according to the optimum conditions for the enzyme used. The treatment time is set to 30 to 60 minutes in order to reduce processing costs and prevent surface roughness due to long-term rubbing. A nonionic surfactant may be used in combination to improve permeability during treatment.

After the weight reduction treatment, it may be washed with water and, if necessary, treated with a common softener using amino-modified dimethylpolysiloxane. The present invention has the above configuration.

[0014]

[Effect] When animal hair fiber products are subjected to low-temperature plasma treatment, high shrink-proofing performance is obtained without damaging or falling off scale, but the texture becomes rough. This roughness is thought to be due to the unevenness of the scale surface affected by the plasma. If animal hair fiber products in such a state are subjected to shrink-proof processing using a shrink-proof resin and then subjected to a weight reduction treatment using a proteolytic enzyme, the scales in the outermost layer and difficult to be protected by the shrink-proof resin will be reduced. It is presumed that the surface melts very smoothly and the unevenness disappears, so there is no roughness, and the fibers become thinner and move more easily, resulting in a softer texture. As for the shrink-proof performance, the shrink-proof property due to the action of low-temperature plasma and the shrink-proof property due to the shrink-proof resin combine to show a shrink-proof property that can withstand 30 washes.

[0015]

EXAMPLES Next, the method of the present invention will be explained in more detail with reference to Examples. The performance of the fabrics in the Examples was measured by the following method. (1) Shrinkage rate JIS L-0217 (103 method, line drying) (2) Flexibility JIS L-1096 (handle-o-meter method) (3
) Wind A texture sensitivity test was conducted to evaluate the presence or absence of a soft texture with coreless resilience and drapability inherent to animal hair fibers in the following three stages. ○: Yes △: Weak ×
:none

Example 1 Using 100% wool 2/48 Viera fabric,
This was subjected to low temperature plasma treatment under the following low temperature plasma treatment conditions 1. [Low-temperature plasma treatment conditions 1] Gas type: Oxygen Gas flow rate: 0.2 liters/min Vacuum
Degree: 1.0 Torr High frequency output: 0
．． 5kw Processing time: 1 minute

Next, the fabric treated with low-temperature plasma was immersed in an aqueous solution of the following formulation 1, squeezed with a mangle at a squeezing rate of 70%, and dried at 110°C for 2 minutes.
Heat treatment was performed at 0° C. for 1.5 minutes. [Formulation 1] Elastron BAP 50
g/liter (Daiichi Kogyo Seiyaku Co., Ltd., blocked urethane resin) Sodium bicarbonate
3g/liter (pH adjuster) Nikka Silicone AM-3000 20g/liter (manufactured by NICCA Chemical Co., Ltd., amino-modified dimethylpolysiloxane)

Subsequently, using a treatment solution of the following formulation 2, enzyme treatment was carried out in a jet dyeing machine at a bath ratio of 1:30, a solution temperature of 50° C., and a time of 30 minutes to reduce the weight. The weight loss rate was 4%. [Formulation 2] Enthilon PN-10L 15% owf (manufactured by Rakuto Kasei Co., Ltd., protease) Actinol R-100
1g/liter (manufactured by Matsumoto Yushi Co., Ltd., nonionic surfactant)

[0019] Next, wash with water and hot water in the usual manner, and then use the Nikka Silicone AM-300.
0 (manufactured by Nicca Chemical Co., Ltd., amino-modified dimethylpolysiloxane) 5% owf, bath ratio 1:30, temperature 40° C., treatment time 10 minutes, dehydrated and then dried.

For comparison with the present invention, a comparative shrink-proofed fabric (Comparative Example 1) was obtained in exactly the same manner as in this example except that only the enzyme treatment was omitted.

The performance of the shrink-proof fabrics of the present invention and comparative fabrics was measured and evaluated, and the results are shown in Table 1.

[0022]

[Table 1]

As is clear from Table 1, the preshrunk fabric obtained by the method of the present invention has a soft texture and retains the original texture of animal hair fibers, while also having durable antishrunk properties. Ta.

[0024]

Effects of the Invention: According to the method of the present invention, while maintaining the soft texture with coreless resilience and drapability inherent to animal hair fibers, it has excellent shrink-proofing performance that can withstand 30 washes in a washing machine. It can be applied to animal hair fiber products.

Claims (1)

[Claims] [Claim 1] Animal hair characterized by subjecting an animal hair fiber product to low-temperature plasma treatment, followed by pre-shrunk processing using a shrink-proofing resin, and then subjecting it to a weight loss treatment of 2 to 10% by weight using a proteolytic enzyme. A shrink-proofing method for textile products.