JPH06108307A - Highly moisture absorbing fiber - Google Patents

Abstract

PURPOSE:To obtain fibers with very good hand having a specific feeling given by collagen addition and excellent in moisture absorbability and passableness in a following process. CONSTITUTION:To a solution in which 100 pts.wt. acrylonitrile polymer are dissolved in a solvent, 5-70 pts.wt. collagen particles having <=10mum average particle size are added and dispersed to make a composition, which is spun to obtain an acrylonitrile highly moisture absorbing fibers having specific characteristics.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an acrylonitrile-based highly hygroscopic fiber having excellent hygroscopicity and suitable fiber properties suitable for clothing.

[0002]

2. Description of the Related Art Conventionally, from the viewpoint of comfort of clothing, it is very important to absorb water vapor generated by perspiration from the skin and to impart a function of preventing stuffiness in clothes. In order to impart the property, a method of modifying the polymer itself or incorporating an additive having excellent hygroscopicity has been studied.

On the other hand, in order to supply it as a clothing material, it is necessary to be able to perform processing such as knitting and weaving, but for that purpose, the fiber must have a certain level of fiber physical properties.

Acrylonitrile fibers are widely accepted in the world due to various characteristics such as excellent texture, color development and heat retention, but they are not sufficient in terms of hygroscopicity. Studies have been conducted on the improvement of hygroscopicity.

[0005] However, according to the techniques hitherto, no acrylonitrile-based fiber has been obtained which satisfies hygroscopicity and fiber physical properties to a higher degree.

[0006]

The object of the present invention is to have high hygroscopicity and appropriate physical properties while maintaining the characteristics as an acrylonitrile fiber, so that it can be used for clothing. In the case of the above, it is to provide a fiber which is very comfortable and does not require a special processing method.

[0007]

The gist of the present invention is to add and disperse 5 to 70 parts by weight of collagen particles having an average particle size of 10 μ or less to a solution prepared by dissolving 100 parts by weight of an acrylonitrile polymer in a solvent. It is an acrylonitrile-based highly hygroscopic fiber having the following characteristics, which is obtained by spinning the above composition. Official moisture regain ≧ 3% by weight Fineness ≦ 20d Tensile strength ≧ 1g / d Tensile elongation ≧ 5% Initial elastic modulus ≧ 10g / d In order to obtain the comfort of the clothing, which is the object of the present invention, The higher the hygroscopicity is, the more preferable, but the official moisture regain is required to be at least 3% or more.

Further, in order to perform knitting, weaving, etc., which are generally performed at present, in order to supply it as a clothing material,
Fiber physical properties include a fineness of 20 d or less, a tensile strength of 1 g / d or more,
It is necessary that the tensile elongation is 5% or more and the initial elastic modulus is 10 g / d or more.

As the acrylonitrile polymer in the present invention, various copolymers which are generally used at present can be used, and examples thereof include vinyl acetate, vinylidene chloride, acrylamide, methyl methacrylate, acrylic acid, methyl acrylate, Examples thereof include vinyl bromide and sodium methacryl sulfonate.

As the solvent used in the present invention, those generally used as a solvent for an acrylonitrile polymer can be used, and examples thereof include dimethylacetamide, dimethylformamide, dimethylsulfoxide,
Examples include γ-butyrolactone, ethylene carbonate, sodium thiocyanate nitrate, and zinc chloride aqueous solution.

The collagen particles in the present invention include
It is not particularly limited, and for example, those obtained by refining commonly used skin-like substances such as pigs and cows and pulverized to an average particle size of 10 μ or less can be used.
The use of collagen powder having an average particle size of more than 10 μ is not preferable because spinning stability is reduced.

The amount of collagen particles to be added and dispersed in the acrylonitrile polymer should be 5 to 70 parts by weight based on 100 parts by weight of the acrylonitrile polymer. If the amount is less than 5 parts by weight, sufficient hygroscopicity is not imparted, and improvement in comfort when used as clothing cannot be obtained. On the other hand, when it exceeds 70 parts by weight, the physical properties of the obtained fiber are deteriorated and the usual post-processing processability is deteriorated, which is not preferable.

The spinning method in the present invention is not particularly limited, and wet, dry-wet and dry spinning methods which are generally used for the production of acrylonitrile fibers can be used and can be selected depending on the purpose. You can choose The post-processing referred to in the present invention means, for example, a crimping step, a drafting step, a spinning step, a dyeing step, which is performed to create a knitted fabric.
This is a weaving process and the like, and in these subsequent processes, it is necessary that the raw yarn has appropriate strength, elongation and initial elastic modulus.

The present invention will be described below with reference to examples.

[0015]

【Example】

(Example 1) A 20% by weight dimethylacetamide solution of an acrylonitrile-based copolymer consisting of 91.4% by weight of an acrylonitrile unit and 8.6% by weight of a vinyl acetate unit was treated with collagen powder having an average particle size of 5μ and an acrylonitrile-based polymer 100. 30 parts by weight with respect to parts by weight was added and dispersed, and the resulting composition was wet-spun to obtain fibers having a fineness of 5 denier having the following characteristics.

In the spinning at this time, a nozzle having a pore diameter of 100 μ was used, a coagulation bath was a 60% by weight aqueous solution of dimethylacetamide at 50 ° C., and a cascade draw ratio was 5 times.

Equilibrium moisture content 8% by weight Tensile strength 1.8 g / d Tensile elongation 12% Initial elastic modulus 33 g / d Further, when the obtained fiber is knitted,
No problem occurred in the process.

Further, the fabric using the present fiber has no stickiness and has a texture unique to the addition of collagen as compared with the conventional acrylic fiber, and the touch is very good.

(Example 2) Acrylonitrile unit 94.
To a 28% by weight dimethylacetamide solution of an acrylonitrile-based copolymer composed of 4% by weight and a methyl acrylate unit of 5.6% by weight, 10 parts by weight of collagen powder having an average particle diameter of 5 μ was added to 100 parts by weight of the acrylonitrile-based polymer. Then, the obtained composition was subjected to dry-wet spinning to obtain a fiber having a fineness of 5 denier having the following characteristics.

In the spinning at this time, a nozzle having a pore diameter of 200 μ was used, a coagulation bath was a 60% by weight aqueous solution of dimethylacetamide at 30 ° C., and a cascade draw ratio was 5 times.

Equilibrium moisture content 4% by weight Tensile strength 2.1 g / d Tensile elongation 15% Initial elastic modulus 40 g / d Further, when knitting was performed using the obtained fiber,
No problem occurred in the process.

Further, the fabric using the present fiber had a non-greasy feeling and a texture unique to the addition of collagen as compared with the conventional acrylic fiber, and the touch was very good.

Example 3 Acrylonitrile unit 91.
To a 15% by weight dimethylacetamide solution of an acrylonitrile-based copolymer consisting of 4% by weight and a vinyl acetate unit of 8.6% by weight, 60 parts by weight of collagen powder having an average particle diameter of 5μ was added to 100 parts by weight of an acrylonitrile-based polymer. The resulting composition was dispersed and wet-spun to obtain a fiber having a fineness of 5 denier having the following characteristics.

In the spinning at this time, a nozzle having a pore size of 100 μ was used, a coagulation bath was a 60% by weight aqueous solution of dimethylacetamide at 50 ° C., and a cascade draw ratio was 5 times.

Equilibrium moisture content 12% by weight Tensile strength 1.1 g / d Tensile elongation 10% Initial elastic modulus 25 g / d Further, when knitting was performed using the obtained fiber,
No problem occurred in the process.

Further, the fabric using the present fiber has a non-greasy feeling and has a texture unique to the addition of collagen as compared with the conventional acrylic fiber, and the touch is very good.

Comparative Example 1 The amount of collagen particles added was 8
A fiber having the following characteristics was obtained in the same manner as in Example 1 except that the amount was 0 part by weight.

Equilibrium moisture content 12% by weight Tensile strength 0.6 g / d Tensile elongation 3% Initial elastic modulus 15 g / d Further, using the obtained fiber, knitting was carried out.
The yarn could be broken and the process could not be passed.

(Comparative Example 2) The amount of collagen particles added was 2
A fiber having the following characteristics was obtained in the same manner as in Example 1 except that the weight part was used.

Equilibrium moisture content 2% by weight Tensile strength 2.2 g / d Tensile elongation 20% Initial elastic modulus 35 g / d Further, when knitting was performed using the obtained fiber,
No problem occurred in the process.

However, the fabric using the present fiber did not show any particular change in tactile sensation as compared with the conventional acrylic fiber.

(Comparative Example 3) Wet spinning was tried in the same manner as in Example 1 except that collagen powder having an average particle size of 20μ was used, but spinning stability was not obtained, and fibers could not be obtained. .

[0033]

As described above in detail, a fabric obtained by spinning a composition in which a specific amount of collagen particles having a specific particle size is added and dispersed in a solution prepared by dissolving an acrylonitrile-based polymer in a solvent is It is excellent in hygroscopicity and post-process passability, has a unique texture of collagen addition, and has a very good feeling, and its effect is extremely large.

Continuation of front page (51) Int.Cl. ⁵ Identification code Office reference number FI technical display area // D06M 101: 14

Claims (1)

[Claims] 1. A composition comprising 100 parts by weight of an acrylonitrile-based polymer dissolved in a solvent and 5 to 70 parts by weight of collagen particles having an average particle diameter of 10 μm or less added thereto and dispersed to obtain a composition, Acrylonitrile-based highly hygroscopic fiber having characteristics. Official moisture content ≧ 3% by weight Fineness ≦ 20d Tensile strength ≧ 1g / d Tensile elongation ≧ 5% Initial elastic modulus ≧ 10g / d