JPH05295676A - Method for dyeing polyamide-based fiber structure - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a dyeing method for obtaining a polyamide dyed fiber structure which is dark and has excellent dyeing fastness. [Structure] A polyamide fiber structure having a single yarn fineness of 0.02 to 1.0 denier is dyed with a neutral metal-containing dye and / or a disperse dye, and then fixed with tannic acid and tartar, and further, A method for dyeing a polyamide-based fiber structure, which comprises performing alkali reduction cleaning.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dyeing a polyamide fiber structure having excellent dyeing fastness.

[0002]

2. Description of the Related Art Polyamide fibers represented by nylon 6 or nylon 66 have excellent characteristics that they are soft to the touch and resistant to abrasion, and are used in the clothing field by themselves or in combination with polyester fibers. There is.

However, it is well known that when the single yarn fineness becomes small, even if the amount of dye used is increased, a sufficient apparent density cannot be obtained due to the large amount of light reflected from the surface of the fiber. However, the dyeing fastness, which is typified by the washing fastness, is inferior and is a problem in practical use.

As a method for improving these drawbacks, there has been proposed a method in which a polyamide-based ultrafine fiber is dyed and then treated with tannin and a metal salt (JP-A-63-31596).
JP-A No. 60-252784, JP-A No. 63-63
No. 303187), the dyeing fastness of the deep-colored dyed product is not perfect and is still insufficient.

[0005]

DISCLOSURE OF THE INVENTION The object of the present invention is to provide a dyeing method for obtaining a polyamide dyed fiber structure having a dark color and excellent dyeing fastness.

[0006]

According to the present invention, a single yarn fineness of 0.
After dyeing a polyamide-based fiber structure having a denier of 02 or more and 1.0 denier or less with a neutral type gold-containing dye and / or a disperse dye, fixing treatment is performed with tannic acid and tartar, and further alkali reduction washing is performed. A method for dyeing a polyamide-based fiber structure, which is characterized in that it is applied.

The polyamide-based fiber structure used in the present invention is obtained by a known production method. For example, a sea-island type multi-component fiber in which sea components are decomposed, a release-type fiber is released, and a strong stretch is used. Examples include spun type fibers. Further, fibers other than polyamide fibers, for example, fibers of polyester type may be used in combination. The fibrous structure is a fibrous sheet-like material such as a woven fabric, a knitted fabric, and a non-woven fabric.

Any neutral type gold-containing dye and disperse dye can be used in the present invention, but it is preferable to select one which is easily dispersed in water and has a high affinity for polyamide fibers. Examples of the tannic acid of the present invention include pentan tannin, gallic tannin and the like. The fixing treatment with tannic acid and tartar is preferably at about 70 to 80 ° C.

In the alkaline reduction cleaning of the present invention, caustic soda, soda ash and the like can be used as the alkaline agent, and hydrosulfite, Rongalit and the like can be used as the reducing agent. If a polyoxyethylene alkylamine quaternary compound is used as an auxiliary agent in the alkaline reduction cleaning, the cleaning effect is further improved.

[0010]

EFFECTS OF THE INVENTION The polyamide dyed fiber structure thus obtained has a higher dyeing fastness, especially a washing fastness, than the one obtained by fixing treatment with tannin and tartar which has been carried out by a conventionally known method. The degree is good, and even a deep-colored dyeing product is sufficiently durable for practical use.

The present invention will be specifically described below with reference to examples, but the present invention is not limited to these examples. In the examples, the dyeing property is CIE1976L * a.
It is expressed by the L * value of * b * system, and the wash fastness is JIS L-
It was carried out by the 0844A-2 method and judged on a gray scale.

[0012]

Example 1 A knitted fabric having a basis weight of 150 g / m ² made of nylon 6 fiber having a single yarn fineness of 0.05 denier was subjected to dyeing, fixing treatment and alkali reduction washing under the following conditions. Table 1 shows the dyeability and the wash fastness of the treated fabric. Dyeing conditions Lanasyn Black S-AL (Sand) 10.0 (% owf) Acetic acid 1.0 (g / l) Bath ratio 1:20 Dyeing temperature 100 ° C time 60 minutes Fixing treatment condition Tannic acid extract (Dainippon Pharmaceutical Co., Ltd.) 4.0) (% owf) Bath ratio 1:20 Treatment temperature 70 ° C. time 20 minutes Potassium antimony tartrate (Dainippon Pharmaceutical Co., Ltd.) 3 (% owf) Treatment temperature 70 ° C. time 20 minutes Alkali reduction cleaning Bisnol RK ( On the other hand, manufactured by Yushisha Co., Ltd.) 1 g / l hydrosulfite 3 g / l caustic soda 2 g / l temperature 60 ° C. time 15 minutes

[0013]

[Comparative Example 1] Table 1 shows the dyeing property and the washing fastness when the same fabric as in Example 1 was dyed and fixed under the same conditions as in Example 1 and only alkali reduction washing was omitted. Show.

The dyeability was good, but the wash fastness was unsatisfactory.

[0015]

[Example 2] Total fineness 150 denier, filament number 4
It consists of 0 and the mixing ratio of nylon to polyester is 1 to 1
A weight of 20 using a 12-division release fiber (weight ratio)
By knitting a 0 g / m ² knitted fabric and subjecting the resulting fabric to a relaxing treatment in high temperature hot water of 130 ° C. for 60 minutes,
A polyester / nylon mixed fabric having a single yarn fineness of 0.3 denier was obtained. The cloth was dyed, fixed and treated with an alkali reducing agent under the following conditions.

Table 1 shows the dyeing properties and the fastness to washing at that time. Dyeing conditions Foron Black RD-2GS 200% (Sand) 4.5 (% owf) Acetic acid 1.0 (g / l) Bath ratio 1:20 Dyeing temperature 130 ° C time 60 minutes Fixing treatment condition Tannic acid extract (Dainippon Pharmaceutical Co., Ltd.) 4.0 (% owf) Bath ratio 1:20 Treatment temperature 80 ° C. time 20 minutes Potassium antimony tartrate (Dainippon Pharmaceutical Co., Ltd.) 2 (% owf) Treatment temperature 80 ° C. time 20 minutes Bath ratio 1:20 Alkali reduction cleaning Bisnol RK (manufactured by Yatasha Yushi Co., Ltd.) 2 g / l hydrosulfite 3 g / l caustic soda 2 g / l temperature 80 ° C. time 15 minutes bath ratio 1:20

[0017]

[Comparative Example 2] Table 1 shows the dyeing properties and washing fastness when the same fabric as in Example 2 was dyed and fixed under the same conditions as in Example 2 and only alkali reduction washing was omitted. Show.

No satisfactory wash fastness was obtained.

[0019]

Example 3 Using the cloth obtained in Example 2 under the following conditions:
Dyeing, fixing, and alkali reduction cleaning were performed. Dyeing conditions Foron Black RD-2GS 200% (Sand) 10 (% owf) Acetic acid 1.0 (g / l) Bath ratio 1:20 Dyeing temperature 135 ° C time 60 minutes Fixing treatment condition Tannic acid extract (Dainippon Pharmaceutical Co., Ltd.) 4) (% owf) Bath ratio 1:20 Treatment temperature 80 ° C. Time 20 minutes Potassium antimony tartrate (manufactured by Dainippon Pharmaceutical Co., Ltd.) 2 (% owf) Bath ratio 1:20 Treatment temperature 80 ° C. Time 20 minutes Alkali reduction cleaning Bisnol RK (manufactured by Yatasha Yushi Co., Ltd.) 2 g / l hydrosulfite 3 g / l caustic soda 2 g / l temperature 80 ° C. time 15 minutes bath ratio 1:20

[0020]

[Comparative Example 3] Table 1 shows the dyeing properties and washing fastness when the same fabric as in Example 2 was dyed and fixed under the same conditions as in Example 3 and only alkali reduction washing was omitted. Show.

No satisfactory wash fastness was obtained.

[0022]

[Table 1]

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Claims (1)

[Claims] 1. A single yarn fineness of 0.02 denier or more and 1.0
A polyamide characterized in that a polyamide fiber structure having a denier or less is dyed with a neutral type gold-containing dye and / or a disperse dye, and then fixed with tannic acid and tartar, and further subjected to alkali reduction washing. Method for dyeing fiber-based structures.