JPH04316687A - Coloring of cellulosic fiber structure containing protein fiber - Google Patents

Abstract

PURPOSE:To provide a one-stage process for the coloring of a cellulosic fiber structure containing protein fibers and having excellent level dyeing property. CONSTITUTION:A processing liquid containing an epoxy compound and a catalyst is applied to a fiber structure composed of cellulosic fibers and protein fibers and cross-linked. The treated fiber structure is colored with at least one kind of dye selected from reactive dye, direct dye and acid dye.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for coloring fibrous structures made of cellulose fibers and protein fibers.

0002

[Prior Art] When coloring cellulose fiber structures containing protein fibers, such as fiber structures made of cotton, silk, or wool, by dyeing, printing, etc., a large amount of alkaline chemicals are used in pretreatment steps such as scouring and bleaching. Treatment is necessary, but protein fibers have poor alkali resistance and easily become brittle.
The processing conditions in these pretreatment steps are significantly restricted,
Since sufficient scouring cannot be carried out, improvement of the dye,
Various methods of improving the coloring method, preparation process, etc. have been considered (for example, Japanese Patent Publication No. 35508/1983). however,
Despite various improvement methods, the coloring of cellulose fiber structures containing protein fibers is carried out using a two-step coloring method consisting of coloring with dyes for protein fibers and coloring with dyes for cellulose fibers. One-step coloring methods using dyes common to This is because cellulose fibers and protein fibers have different dyeing rates even when common dyes are used, and it is difficult to uniformly color both cellulose fibers and protein fibers.

[0003] In order to solve these problems, Japanese Patent Application Laid-Open No. 186580/1983 discloses a method containing a vinyl sulfone type reactive dye when dyeing a fiber structure made of cellulose fibers and protein fibers. A one-step dyeing method has been proposed in which a neutral to acidic dye solution is applied, the material is rolled up, left to stand, and then dried, and then an alkaline solution is applied and then steamed.

0004

[Problems to be Solved by the Invention] However, the two-step coloring method disclosed in the above-mentioned prior art, which consists of coloring with a dye for protein fibers and coloring with a dye for cellulose fibers, does not improve productivity and increases costs. There is a problem.

Furthermore, the method disclosed in JP-A-61-186580 also has the drawback that only vinylsulfone type reactive dyes can be used.

As a result of intensive research into methods for coloring cellulose fiber structures containing protein fibers, the present inventors discovered a new coloring method that solved the problems of the existing methods described above, and the present invention was achieved. It is.

An object of the present invention is to provide a method for coloring cellulose fiber structures containing protein fibers with excellent level dyeing properties. Another object is to provide a coloring method in which such coloring is carried out in one step.

[0008]

[Means for Solving the Problems] The above object is to apply a processing liquid containing an epoxy compound and a catalyst to a fibrous structure consisting of cellulose fibers and protein fibers, crosslink it, and then dye the fibrous structure with a reactive dye. This is achieved by a method for coloring cellulose fiber structures containing protein fibers, which is characterized by coloring with at least one kind of dye selected from , direct dyes, and acid dyes.

The present invention will be explained in detail below.

Cellulose fibers that can be used in the present invention include cotton, linen, viscose rayon, cupro, acetate, etc., but cotton is most preferred from the viewpoint of the invention's effectiveness and utility value. Also, protein fibers include wool,
Silk, mohair, cashmere, recycled silk, etc. are available, but wool and silk are preferable.

[0011] The mixing ratio of cellulose fibers and protein fibers is not particularly limited, and the mixing of the two may be any of blended spinning, twisted twisting, mixed weaving, and mixed knitting.

[0012] The present invention pre-treats fiber structures such as yarns, woven fabrics, knitted fabrics, and non-woven fabrics using cellulose fibers containing protein fibers with an epoxy compound as described below, and dyes selected from reactive dyes, direct dyes, and acid dyes. Coloring with at least one type of dye is sequentially applied.

[0013] The epoxy compound used in the present invention is preferably of a water-soluble type for work purposes. Such water-soluble epoxy compounds include ethylene glycol, polyethylene glycol, propylene glycol, polypropylene glycol, glycerin, sorbitol, polyglycerol, pentaerythritol, tris(2-hydroxyethyl)
Mention may be made of the mono- and polyglycidyl ethers of isocyanurates, trimethylolpropane, neopentyl glycol, phenol ethylene oxide, lauryl alcohol ethylene oxide. ethylene glycol,
Preferred are polyglycidyl ethers such as polyethylene glycol, propylene glycol, polypropylene glycol, phenol ethylene oxide, lauryl alcohol ethylene oxide, glycerol, and polyglycerol. These water-soluble epoxy compounds are used after being dissolved in water, but in the case of compounds with low solubility, they are dissolved in a medium consisting of a small amount of an organic solvent such as dioxane or isopropyl alcohol and water.

[0014] The amount of epoxy compound applied varies depending on the epoxy equivalent, etc., but in the dipping method, it is
-20% by weight, preferably 3-15% by weight. 3 to 3 for pad-steam method and pad-dry-steam method
50% by weight, preferably 6-40% by weight. In the cold batch method, 5 to 50% by weight, preferably 10 to 40% by weight.
Weight%.

[0015] Neutral salts, weak alkaline salts, alkaline salts, acid salts, alkali metal hydroxides, aqueous ammonia and amines can be used as catalysts, but they can be used in combination with epoxy compounds to modify protein fibers. Neutral salts, weakly alkaline salts, and amines are most effective for this purpose. Sodium citrate, sodium tartrate, sodium acetate, sodium thiosulfate, pentasodium diethylenetriaminepentaacetate, sodium chloride, sodium sulfate, 2
Methylimidazole and magnesium chloride are preferably used.

[0016] As a method for treating the cellulose fiber structure containing protein fibers, an immersion heating method, a pad-steam method, a pad-dry-steam method, and a cold batch method can be used. In order to achieve sufficient processing in the immersion heating method, that is, to advance the reaction of the epoxy compound to the protein fibers, the heat treatment temperature needs to be 70° C. or higher. Pad-
In the steam method, for example, 50 to 200
After applying % by weight, preferably 80-120% by weight of the processing liquid, saturated steam is steamed at a temperature below 120°C, preferably below 110°C. In the pad-dry-steam method, for example, after applying a processing liquid of 50 to 200% by weight, preferably 80 to 120% by weight, to the protein fiber,
Drying at a temperature of 0 to 120 °C, then steaming with superheated steam at a temperature of 150 °C or less or a temperature of 120 °C or less, preferably 11
Steam with saturated steam below 0°C.

[0017] In the cold batch method, for example, 50 to 200% by weight, preferably 80 to 120% by weight, based on protein fiber.
After applying a processing liquid of % by weight, the material is then placed at room temperature without drying, for example, by rolling it up and covering it with a film or the like to prevent water evaporation. Room temperature is 10℃ or higher, 40℃
The following is preferable, and 20°C or more and 35°C or less are particularly preferable. The time for leaving at room temperature varies depending on the temperature and composition of the working fluid, but it is preferable to allow the reaction to proceed sufficiently for 20 hours or more. If the reaction is allowed to proceed sufficiently within 20 hours, the treatment solution may become unstable and the fibers may harden. While keeping it at room temperature, give it some movement to prevent the formation of adhesion spots. For example, it is desirable to roll it up and rotate it.

After the treatment with the epoxy compound, washing with hot water, soaping, washing with hot water, and washing with water are carried out according to conventional methods.

Next, these fiber structures are colored by dyeing, printing, etc. In the coloring step, reactive dyes, direct dyes, and acid dyes are used, and reactive dyes are preferably used. The method is not particularly limited, and commonly used continuous methods, exhaustion methods, pad-batch methods, printing methods, etc. can be applied, but it is preferable to carry out the method at a low temperature and a low alkali content as much as possible. .

The present invention has the advantage that cellulose fibers and protein fibers are dyed in the same color, and the same can be said for printing. The fibrous structure colored by dyeing, printing, etc. as described above is subjected to finishing treatments such as steaming, softening agent treatment, etc., as necessary. These colored fiber structures are brighter, darker, and have better color fastness than conventional colored cellulose fiber structures containing protein fibers, and the protein fibers do not become brittle and have a good texture. . Such an effect can only be obtained by coloring a fiber structure treated with the epoxy compound according to the method of the present invention, and its industrial utility value is great.

It goes without saying that bleaching may be carried out before the treatment with the epoxy compound. Due to the protein fiber content, bleaching cannot be performed using strong alkalis such as caustic soda, which is normally used for cotton, and is preferably carried out at a pH of 10.0 or less. Methods carried out in acidic ranges include acidic activation methods using peracetic acid, strong formic acid, and hydrogen peroxide, and methods carried out in weakly alkaline ranges include:
pH8.0-1 using surfactants, hydrogen peroxide, ammonia, sodium pyrophosphate, sodium tripolyphosphate, etc.
It is adjusted to 0.0 and carried out by a dipping method, a pad roll method, a pad steam method, etc.

[0022] Also, before performing such bleaching,
35508, in which a hydrophobic activator is applied and then an aqueous alkali metal oxide solution is applied, or ammonia, sodium pyrophosphate, sodium tripolyphosphate, etc. are used in combination with a surfactant to achieve a pH of 6.0 to 10. Needless to say, you can adjust it to 0 and refine it.

[0023]

[Function] Since the present invention is constructed as described above, by treating the protein fiber with an epoxy compound, the amino terminal groups of the protein fiber are appropriately blocked, and the dyeability of the protein fiber is reduced. When dyed with reactive dyes, the dyeability of cellulose fibers and protein fibers becomes similar, making it possible to perform a one-step coloring method.

[0024]

[Examples] The present invention will be specifically explained below with reference to Examples.

[0025] The dyeability, dyed surface, and wrinkle resistance described in the Examples were measured by the following methods.

(1) Stainability K/S=(1-R)2/2R R: Reflectance at 450 nm in spectrophotometer 450 nm
The optical density K/S value was taken and the stainability was compared.

(2) Dyeing surface The test was carried out by five specialized inspectors to evaluate the marbling state caused by the warp and weft.

(3) Anti-wrinkle property Five professional inspectors evaluated the state of recovery after applying wrinkles by visual judgment.

Example 1 Silk and cotton mixed fabric (warp silk 100% silk spun 140 count double yarn, density 110 yarns/inch, weft 100% cotton 50 count single yarn, density 75 yarns/inch) was treated with hydrogen peroxide (35% yarn). )1% by weight,
Bleaching was carried out at 70° C. for 90 minutes in a Jigger dyeing machine with a bath ratio of 1:30 consisting of 2% by weight of sodium pyrophosphate.

P containing 80 g/l of Denacol EX-810 (manufactured by Nagase Kasei Co., Ltd., ethylene glycol diglycidyl ether) and 100 g/l of common salt as a catalyst was added to the fabric.
Immerse in an aqueous solution of H11 and squeeze to 85% using a mangle.11
After drying at 0°C, it was steamed at 120°C for 10 minutes using superheated steam. After that, it was washed with hot water, soaped, washed with hot water, washed with water, and then dried.

[0031] The fabric subjected to the above pretreatment is treated with Drimar.
ene Blue-K2RL (manufactured by Sandoz Co., Ltd., reactive dye) 20 g/l, urea 100 g/l, Succinol CSK (manufactured by Nippon Someka Kogyo Co., Ltd., penetrating agent) 2 cc/l,
After padding with a dyeing solution consisting of 5 g/l of Diatex DY Conc (manufactured by Nagase Sangyo Co., Ltd., reduction inhibitor) and 15 g/l of soda ash at a pick-up rate of 70%, it was rolled up and heated at 20°C (room temperature). It was left for 20 hours. Thereafter, the product of Example 1 was obtained by washing with water, hot water, and drying after washing with water.

A product of Comparative Example 1 was obtained by using the same fabric as in Example 1 and carrying out the same treatment as in Example 1 except for the portion to be treated with the epoxy compound of Example 1.

[0033] The warp and weft yarns were unwound from the products obtained in Example 1 and Comparative Example 1, tied into bundles of 30 yarns each, and the color was measured using a Macbeth MS-2020 spectrophotometer.
The S value was calculated. The results are shown in Table 1.

[0034]

[Table 1]

As is clear from Table 1, the dyed products treated with the epoxy compound have a small color difference between silk fibers (warps) and cotton fibers (wefts), and are uniformly dyed. It can also be seen that it has excellent wrinkle resistance.

[0036]

As described in detail above, according to the method of the present invention, a fiber structure having excellent level dyeing properties and a deep color can be obtained. Moreover, since it is a one-step coloring method, it is an energy-saving and water-saving coloring method and is extremely useful. Furthermore, since wrinkle resistance is obtained by crosslinking the epoxy compound, it is extremely useful as a wash-and-wear product for casual use.

Claims (1)

[Claims] Claim 1: After applying a processing liquid containing an epoxy compound and a catalyst to a fibrous structure consisting of cellulose fibers and protein fibers and crosslinking the fibrous structure, the fibrous structure is treated with a dye selected from reactive dyes, direct dyes, and acid dyes. A method for coloring a cellulose fiber structure containing protein fibers, the method comprising coloring a cellulose fiber structure containing protein fibers with at least one dye.