JPS61174485A - Dyeing of regenerated fiber or fiber structure - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to recycled cellulose fibers or F! , relates to a dyeing method for w&fiber structures.

(Prior Art) Viscose fibers generally exhibit good dyeability with direct dyes and reactive dyes, but are poorly dyed with cationic dyes.

An attempt to improve the dyeability of cationic dyes and to uniformly dye cationic dyes at the same time without impairing the texture of cellulose in blended, knitted and woven textile products of viscose fibers and acrylic fibers or cationically dyeable polyester fibers. is being done.

For example, a method in which cellulose fibers are pretreated with tannic acid at the cotton and yarn stage to make them cationically dyeable is dyeable with cationic dyes in light colors, but poor color fastness in dark colors, making it impractical.

Furthermore, the method of at-carboxymethylating cellulose fibers to make them cationically dyeable impairs the texture and hygroscopicity of the cellulose fibers, which is also not practical. In addition, special public service Sho 57-1920
Publication No. 7 discloses that aromatic acyl groups or aromatic sulfone groups are introduced into cellulose fibers only on the surface portion of the cellulose fibers using aromatic carboxylic acid or aromatic sulfonic acid, and then an anion having a sulfate ester group or sulfonic acid group is introduced into the cellulose fibers. A method of cationic dyeing in the presence of an ionic surfactant is disclosed. This method also degrades the texture of the cellulose, and when dyed in a deep color, there are problems in terms of fastness. As mentioned above, when cellulose fibers are made cationically dyeable, there is a drawback that the texture of cellulose is impaired to some extent, and neither of these methods is useful.

(While the invention is trying to solve the problem!/a) The object of the present invention is to produce recycled fibers that have almost the same dyeability with direct dyes and wide-spread dyes as ordinary recycled cellulose fibers, and that are dyeable with cationic dyes. To provide a dyeing method with excellent verticality that can simultaneously dye blended yarns, blended woven and knitted fabrics, and mixed woven and knitted fabrics of basic fibers and acrylic with cationic dyes.

(Means for Solving the Problems) The method of the present invention involves treating recycled cellulose fibers or fiber structures containing gold polystyrene sulfonate with an aqueous solution of tannic acid before or after dyeing with a cationic dye. It is characterized by

The amount of polystyrene sulfonate used in the present invention is usually 0.1 to 20% by weight, preferably 10% to 10% by weight. The recycled cellulose fiber may be either viscose process rayon or copper ammonia process rayon.

Fiber structures include not only recycled cellulose fibers alone, but also blended yarns of recycled cellulose fibers and acrylic fibers or polyester fibers, woven or knitted fabrics made of these, or yarns made of recycled cellulose fibers and acrylic yarns. Alternatively, intertwisted yarns with polyester yarn, interwoven fabrics, interlaced & i1 knitted fabrics, etc. may be mentioned. The mixing ratio of recycled cellulose fibers and acrylic fibers or cationically dyeable polyester fibers is 60% by weight of acrylic fibers or cationically dyeable polyester fibers.

Further, in the present invention, the treatment with an aqueous tannic acid solution may be performed before or after dyeing, but treatment after dyeing is preferable. The concentration of tannic acid is usually 10-601//l.

Preferably 15-50 g/l, temperature usually 80-9
The temperature may be 5° C., preferably 60 to 96° C., and the time may be 0.5° C., but it is preferable to perform the treatment after dyeing, so the fabric is usually treated.

(Effects of the Invention) According to the present invention, a fiber structure consisting of modified regenerated cellulose fibers alone or regenerated cellulose fibers, acrylic fibers, or polyester fibers can be made into cationic fibers without a decrease in strength or feel. Acrylic fibers can be dyed with dyes, and acrylic fibers can be dyed at the same time as polyester fibers, and have good color fastness, and have great industrial utility value such as improved quality, simplified processes, and reduced costs.

(Example) 51 below! The present invention will be specifically explained by giving examples.

In addition, the dyeability, strength, texture, and washing fastness described in the examples were measured by the following methods.

(1) The optical density VS at the maximum absorption wavelength was determined using a dye spectrophotometer.

(2) Strong (g) The warp and weft threads were measured using Tensilon.

(3) Texture Judging by touch).

(4) Washing fastness It was measured by the method of JIS 0844 A-2.

Examples 1-4 Polystyrene sulfonic acid 4 with molecular weight t o, o o o
8oS using modified rayon raw cotton containing 41% by weight
A plain weave fabric with a density of 100 and a girth of 72 (lines/inch) was obtained. After de-sizing using a commonly used enzyme remover, aqueous sodium carbonate solution containing hydrogen peroxide (85%) 1011/l and nonionic surfactant IVl was used at pH 10.0 and temperature 80°C. 80,6
It was exposed for 0.90 minutes, washed with water, and then dried.

Next, C1thilon Red BL-H (manufactured by Hodogaya Chemical Co., Ltd.) 6% owf, sodium acetate 1% owf1
Bath ratio 1:50 with PH4 staining solution. Dyeing was carried out at a temperature of 100° C. for 60 minutes, and then treated with an aqueous solution of tannic acid of K 5 G El/l at 80° C. for 30 minutes at a bath ratio of 1:50, washed with water, and then dried.

Comparative Example 1 uses regular rayon, and all other conditions are the same.

Comparative Example 1 is a bleaching treatment run, and Examples 2 to 4 have bleaching treatment times of 80,60 and 90 minutes, respectively.

The results are shown in Table 1.

Table 1 After carrying out the usual desizing and scouring treatments, there was no change in dyeability with cationic dyes even when the specimens were treated under various bright conditions. In addition, compared to the regular sample, the cationic dye dyeing property of this example was greatly improved, and the washing W1 rigidity was also good.

Examples 6-6 Using rayon containing polystyrene sulfonate, rayon 80. A plain weave fabric with a warp and warp of K, a density of warp of 100, and a weft of 72 (thread/inch) was woven from blended yarn 801 of acrylic 20. After de-sizing this fabric by enzymatic de-sizing treatment, it was treated with a sodium carbonate aqueous solution containing 101171 hydrogen peroxide (851) and 1 f/l nonionic surfactant at pH 10.
, 0, temperature 80" (:! After 80 minutes of bleaching and water washing, 10
It was dried under hot air at 6°C.

Next, Cathilon Red BL-H (manufactured by Hodogaya Chemical Co., Ltd.) 5% owf, sodium acetate 1'jowf
, using a PH4 staining solution at a bath ratio of 1:50. Staining was carried out at a temperature of 100°C for 60 minutes, and further dyed with silver tannate NC601.
/l.

The mixture was heated at 80° C. for 80 minutes, bath ratio 1350), washed with water, and then dried.

Comparative Example 2 uses regular rayon, Example 6 Fi polystyrene sulfonate has a molecular weight of 10.000
In Example 6, the molecular weight of polystyrene sulfonate was 50,000.
, using modified rayon containing 81% by weight.

The results are shown in Table 2.

In Comparative Example 2 of Table 2, only the acrylic was dyed, resulting in a frosty finish. In Examples 6 and 6, the frosting tone was improved, the level dyeing property was good, and the washability was also good.

Examples 7-8 Polystyrene sulfonate with molecular weight to, ooo
Two (1/inch) plain weave fabrics were obtained. After desizing using a commonly used enzymatic desizing agent, nonionic surfactant 1
PH10.0 with sodium carbonate aqueous solution containing 11/l
, After scouring for 60 minutes at a temperature of 80°C and washing with water, the concentration of tannic acid was 5011/l.

The samples were treated for 10 minutes and 80 minutes at a bath ratio of 1:8G and a temperature of 80°C, respectively, and washed with water and dried.

Next, C1thilon Red BL-H (manufactured by Hodogaya Chemical Co., Ltd.) 5% owf, sodium acetate 1*owf,
Dyeing was carried out for 60 minutes using a PH4 staining solution at a bath ratio of 1:60 and a temperature of 100°C.

Comparative Example 8 is a blended yarn of regular rayon and acrylic, and Comparative Example 4 is a blended yarn of rayon and acrylic with improved Fi, but without tannic acid treatment.

Table 8 In Comparative Example 8, only the acrylic was dyed, giving a frosty finish.

In Comparative Example 4, the frost tone was improved and the level dyeing property was good, but the washing fastness was poor.

Examples 7 and 8 had good level dyeing properties and washing fastness.

Claims (7)

[Claims] (1) When dyeing recycled cellulose fibers or fiber structures containing polystyrene sulfonate with cationic dyes,
A method for dyeing regenerated cellulose fibers or fiber structures, which comprises treating them with an aqueous solution of tannic acid before or after dyeing. (2) The molecular weight of polystyrene sulfonate is 1,000
2,000,000. The dyeing method according to claim 1. (3) The dyeing method according to claim 1, which contains 0.1 to 20 parts by weight of polystyrene sulfonate. (4) The dyeing method according to claim 1, wherein the concentration of tannic acid is 10 to 60 g/l. (5) When the temperature of the aqueous solution of tannic acid is 80 to 90°C, 0.
The staining method according to claim 1, wherein the staining method is carried out for 5 to 60 minutes. (6) The dyeing method according to claim 1, wherein the fiber structure is a yarn, a woven fabric, or a knitted fabric. (7) The dyeing method according to claim 1, wherein the fiber structure contains at most 50% by weight of acrylic yarn fibers or polyester fibers.