JPS62117891A - Printed fiber composite structure and its production - 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 (Field of Industrial Application) The present invention relates to a method for printing a composite structure of polyester fibers and cellulose fibers that are dyeable under normal pressure with cationic dyes and disperse dyes or disperse dyes. It is a thing,
More specifically, the present invention relates to a fiber composite structure in which the polyester fibers and cellulose fibers of the composite structure are dyed with Hunt dye to substantially the same hue, and a method for printing the same.

(Prior art) Conventional printing methods for composite structures of polyester fibers and cellulose fibers include (1) a method of printing using pigments, (2) a method of printing by mixing a disperse dye and a reactive dye, and (3) a method of printing by mixing a disperse dye and a reactive dye. ) One side printing method of polyester fibers using disperse dyes (4) One side printing method of cellulose fibers using dyes for cellulose fibers (5) Printing methods using dispersed cellulose fiber swelling type dyes are known.

Since the method (1) uses a pigment, the texture of the fiber composite, that is, the fabric, is hardened, and the fastness of the pigment-printed area is poor, making it impossible to obtain a high-quality printed product. In method (2) above, a mixture of regular polyester fibers and cellulose fibers is printed using conventional disperse dyes and reactive dyes, followed by color development by drying, steaming, baking, alkaline treatment, and cold batch. However, with this method, there is almost no movement of the dye onto the fibers, so most of the reactive dyes in the polyester fibers and the disperse dyes in the cellulose fibers are dyed. It remains as an undyed dye.Therefore, it is difficult to remove by washing, resulting in poor fastness, and has the drawbacks of high cost due to low dye utilization rate.

Furthermore, in the method of f31 (41), because it is a one-sided printing method, the printed area becomes marbling, making it impossible to obtain a clear printed product.

Method (5) has the disadvantages of poor hue clarity, poor freshness, and hue differences due to changes in the mixing ratio of polyester fibers and cellulose fibers, making it difficult to obtain high-quality printed products.

(Problems to be Solved by the Invention) The present invention solves the above problems, namely: (1) No hand hardening (2) Excellent color fastness (3) Polyester part and tightening part (4) To provide a printed product which is dyed uniformly and in the same color tone and whose color tone does not change due to changes in mixing ratio.

(Means for Solving the Problems) The present inventors have conducted research to improve the problems that should be solved in the conventional method for printing a composite structure of polyester fibers and cellulose fibers, and reached the law.

That is, the present invention is a composite structure of polyester fibers and cellulose fibers that are dyeable under normal pressure with cationic dyes and disperse dyes, and the polyester fibers and cellulose fibers in the printed area are substantially dyed with the vat dye. A fiber composite structure made of polyester fibers and cellulose fibers, which are dyed in the same hue and are dyeable to cationic dyes and disperse dyes or disperse dyes under normal pressure. Or vat dyes, alkaline agents, etc. on cellulose fibers.
The present invention relates to a method for producing printed polyester fibers and cellulose-based composite structures, which comprises printing or partially applying a dye liquid or printing paste containing a reducing agent as an ingredient, followed by steam fixation treatment at 90 to 110°C. .

In the method of the present invention, since polyester fibers that can be easily dyed in deep colors with cationic dyes, disperse dyes, or disperse dyes at normal pressure are used, normal pressure ground dyeing by dipping is possible in the case of ground dye overprinting. As a result, the hydrolysis of the dye during dyeing is suppressed, the utilization rate of the dye used is high, and the effect of reducing dye costs is particularly large for dark colors. Furthermore, high color fastness can be easily obtained due to the high dye utilization rate and sufficient washing after background dyeing. In particular, it is possible to perform reduction washing if necessary after dyeing polyester fibers, and it is easy to obtain high fastness in deep colors. Furthermore, when dyed under normal pressure, the texture of the dyed fabric is soft.

In the present invention, since polyester fibers and cellulose fibers are simultaneously dyed using only a vat dye by one-time atmospheric pressure steaming, it is possible to dye polyester fibers and cellulose fibers to substantially the same hue, and to dye high quality It is possible to print with a nice feel.

Furthermore, since polyester fibers and cellulose fibers are simultaneously dyed using only vat dyes, the dye usage rate is extremely high, and washing after printing is easy, making it easy to obtain high fastness. Furthermore, the present invention is characterized in that the process is simpler than that of other printing methods for polyester fibers and cellulose fibers, the conditions in each process are easy to control, and it is easy to obtain stable quality.

As described above, according to the present invention, a printed product of a composite structure of high-grade polyester fibers and cellulose fibers can be obtained at a relatively low cost.

The polyester fibers used in the present invention that are dyeable at normal pressure with cationic dyes, disperse dyes, or disperse dyes are those that can be dyed to a sufficiently deep color with cationic dyes, disperse dyes, or disperse dyes at normal pressure. It is polyester fiber.

The polyester fibers that are dyeable under normal pressure with cationic dyes and disperse dyes or disperse dyes used in the present invention are:
A specific example is given below.

An acid component mainly consisting of terephthalic acid or its ester-forming component (80 mol% or more), ethylene glycol,
Based on a terephthalate polyester obtained from a glycol component mainly (80 mol% or more) consisting of one or more types selected from tetramethylene glycol and 1,4-cyclohexane dimetatool, and further (A) It is a fiber obtained by spinning a polyester obtained by copolymerizing an ester-forming component having a sulfonic acid metal salt group as a component and an additional component other than component (A) as a component (B). Specific examples of component (A) include 5-sodium sulfoisophthalic acid, sulfosuccinic acid, 4-sulfonaphthalene-2,7-dicarboxylic acid, 5[4-sulfophenoxy]isophthalic acid, and sulfonic acid metal salt groups. Containing glycols and the like can be mentioned.

More preferred among these are 5-sodium sulfoisophthalic acid and its lower alcohol ester.

Specific examples of component (B) include acid components such as isophthalic acid, adipic acid, sebacic acid, glutaric acid, and naphthalene dicarboxylic acid, and diethylene glycol, triethylene glycol, diethylene glycol, molecular weight i, oo
Examples include polyether glycols having a molecular weight of 500 or less, ethylene oxide adducts, etc., and more preferred are isophthalic acid, glutaric acid, polyethylene oxide adducts having a molecular weight of 500 or less, and diethylene glycol. (A
Components ) and (B) can be selected as appropriate within a range that does not particularly impair the fiber properties, but component (A) is preferably selected in an amount of 6 mol % or less based on the acid component. Alternatively, the glycol component is selected to be 6 mol% or less. (B) As the component,
6.5% or less based on the total polymer is selected. Also(
B) Ingredients such as diethylene glycol and triethylene glycol are not only added actively (
Of course, the monoglycol component may be self-condensed during polymerization and copolymerized into the polymer as a result.

Fibers obtained by spinning these polyesters using a normal spinning method, drawing them, optionally heat setting them, and crimping them are used in the present invention, and the fibers are further spun at a high speed of 2,500 m/min or more. Fibers obtained using other additional means, such as, may also be used. These fibers may be either stable or filament, crimped yarn, processed yarn, or heat-processed yarn. They may also be a mixture of these fibers (and the cross-sectional shape may be circular, irregular, or hollow.

Furthermore, various compounding agents such as inorganic fillers such as silica, clay, kaolin, and calcium carbonate, organic phosphoric acid salts, and sulfonate salts are added during the production of polyester fibers or at any stage after production. Fibers containing organic additives such as these may also be used.

The polyester fibers that are dyeable under normal pressure with the cationic dyes, disperse dyes, or disperse dyes used in the present invention have a dyeing rate (D
When y)% is a disperse dye, it is 50% or more, preferably 70%.
% or more, more preferably 80% or more, and in the case of cationic dyes, 50% or more, preferably 80% or more.
% or more, more preferably 90% or more. (a) Disperse dye dyeing rate test (b) Cationic dye dyeing rate test
Examples include natural cellulose fibers such as cotton and linen, regenerated cellulose fibers such as viscose, polynosic rayon, and ammonium rayon.

They may be staples, filaments. Composite mixtures of these polyester fibers and cellulose fibers include thread-like materials, knitted fabrics, non-woven fabrics, rugs, raised blankets, belt-like materials, etc. Composite forms include blended spinning, blended fibers, mixed knitting and woven fabrics, and multilayered fabrics. In addition to structural fabrics, examples include composite yarns such as cover yarns and arbitrary structures using them.

The mixing ratio of polyester is 5-80%, preferably 10-7
It is 0%.

To explain the printing method in the present invention, a dye liquid or printing paste containing a bundt dye, an alkaline agent, and a reducing agent is printed or partially applied, and after drying, a vapor fixing treatment is preferably carried out at 90 to 110°C.

Further, in a step before or after partial application or printing, under-dying can be carried out by a conventional method using a disperse dye, a cationic dye, or a dye for cellulose fibers.

Furthermore, it is also possible to partially apply or print only a vat dye or a mixture of a vat dye and an alkaline agent, or a sizing agent, and then apply an alkaline agent and a reducing agent, or a liquid or a sizing agent containing only a reducing agent, for dyeing. I can do it.

The buff dye used in the present invention is a vat dye commonly used for dyeing cellulose fibers.

The dye solution and printing paste components can be applied by a transfer method using an engraved roll or by ordinary printing methods such as roller printing,
There are screen printing methods, low-kuri printing methods, etc.

Suitable vat dyes that can be used include indigo and thioindigo dyes. Examples of alkali agents include sodium hydroxide, potassium hydroxide, sodium carbonate, potassium carbonate, sodium bicarbonate, sodium silicate, potassium silicate, trisodium phosphate, tripotassium phosphate, alkali metal salts of trichloroacetate, alkali metal salts of acetate, etc. It will be done. As a reducing agent, Redol C (NallSOz'
Examples include CH2O.211zO), NazSzOs, and Redol C is preferably used. Next, a co-adhesion treatment is carried out, and the conditions are normal pressure steaming at 90 to 110°C, preferably 95 to 105°C.
℃, and the time is 5 to 60 minutes, preferably 10 to 30 minutes. By employing such conditions in the present invention, polyester fibers and cellulose fibers can be colored at once to substantially the same hue under normal pressure.

As a finishing treatment, softness treatment, silicone-based or fluorine-based water repellent treatment, antifouling treatment, or other desired performance may be imparted.

(Example) Example-1 Copolymerization of 3 mol% of 5-sodium and sulfoisophthalic acid based on the total acid component and 3.0% by weight and 1.5% by weight of diethylene glycol based on the total polymer. Polyester staple obtained by spinning, stretching, and heat setting ethylene terephthalate polyester and regenerated cellulose fiber staple (50:
A twill weave made of a blended yarn (weight ratio of 50) was refined by a conventional method and printed according to the following recipe. As a comparative sample, a twill fabric consisting of a blended yarn of polyethylene terephthalate fiber staple obtained by a conventional method and polynosic regenerated cellulose fiber staple (50:50 weight ratio) was similarly refined and printed using the same process.

The printed and dried printed fabric was steamed at 100°C for 20 minutes, and then soaped in a conventional manner. Table 1 shows the observation results of the color density of the printed portion of the printed fabric and the dyeing state of the polyester and polynosic fiber portions.

Table 1 Polyester fibers exhibit vat dye dyeing properties similar to those of polynosic fibers under steaming conditions of 100° C. for 20 minutes, but regular polyester fibers are hardly dyed or dyed only to the extent of staining.

Example-2 Ethylene terephthalate based copolymerization of 3 mol% of 5-sodium sulfoisophthalic acid based on the total acid components, 3.0% by weight of itt based on the total polymer, and 1.5% by weight of diethylene glycol. Polyester fiber staple obtained by spinning, drawing, and heat centrifuging polyester using conventional methods and Polynosic's regenerated cellulose fiber stable (3
A fill fabric made of a blended yarn (weight ratio of 0:70) was refined by a conventional method, printed with a printing paste having the following formulation, and dried.

Thereafter, an alkaline reducing solution having the following formulation was applied to the entire surface of the cloth, and after drying, the cloth was steamed at 100° C. for 20 minutes and soaped in a conventional manner.

(British gum 1% 20) As a result, a uniform purple printed cloth was obtained.

(Effects of the Invention) According to the present invention, a printed article having excellent color fastness without hand hardening can be obtained by a simple printing process.

Further, in the printed product, the polyester portion and the cellulose portion are printed uniformly and in substantially the same color tone.

Further, according to the present invention, the utilization rate of the dye used is high, the effect of reducing the dye cost is large, and cleaning after printing becomes easy.

Claims (1)

[Scope of Claims] 1. A composite structure of polyester fibers and cellulose fibers that is dyeable with cationic dyes and disperse dyes or disperse dyes under normal pressure, and the polyester fibers and cellulose fibers in the printing part are dyed in a batt. A fiber composite structure that is dyed with a dye to substantially the same hue. 2. A dye solution or printing paste containing a vat dye, an alkaline agent, and a reducing agent is applied to a composite structure consisting of polyester fibers and cellulose fibers that are dyeable to cationic dyes, disperse dyes, or disperse dyes under normal pressure. A method for producing a composite structure of printed polyester fibers and cellulose fibers, which comprises printing or partially applying the fibers and subjecting them to a steam fixation treatment at 90 to 110°C.