JPH10280285A - Method for treating textile products containing polyurethane elastic yarn - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a treatment method which is excellent in dyeing fastness of a fiber material containing a polyurethane elastic yarn dyed with a disperse dye, particularly excellent in stain resistance to a dry cleaning solution. SOLUTION: After dyeing a fabric composed of polyester fiber and polyurethane elastic yarn using a disperse dye,
A high-concentration combination of thiourea dioxide and sodium hydrosulfite is used for reduction washing in a single bath under alkali, followed by finishing. Polyurethane-based elastic yarn-containing fiber products that are dyed with a disperse dye and have excellent color fastness can be realized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating a polyurethane elastic yarn-containing fiber product composed of polyurethane elastic yarn and polyester fiber. More specifically, the present invention relates to the provision of a polyurethane elastic yarn-containing fiber product which is suitably used in the field of stretchable garments, is dyed with a disperse dye, and has excellent dyeing fastness.

[0002]

2. Description of the Related Art Polyurethane elastic yarns have excellent elasticity and are therefore widely used as polyurethane elastic yarn-containing fiber products such as knitted fabrics. In particular, it has considerable utility as a fabric for foundations, swimwear and pantyhose.

Generally, fiber products containing polyurethane elastic yarn are poor in various color fastnesses. In the case where a fabric composed of polyurethane elastic yarn and polyester fiber is dyed with a disperse dye, there is a problem of dry cleaning liquid contamination.

[0004] As a method for improving the liquid contamination of dry cleaning of the polyurethane elastic yarn-containing fiber cloth, there are the following methods.
A method of dyeing with a disperse dye followed by reduction and washing using a high concentration of thiourea dioxide or a method of treating with thiourea dioxide and then performing a two-bath treatment with sodium hydrosulfite has been used. However, in these treatments, even if the liquid contamination level of dry cleaning is insufficient or the liquid contamination level is good, the number of post-processing steps is increased, and it is not satisfactory in terms of labor saving.

[0005]

SUMMARY OF THE INVENTION The present invention has been intensively studied in view of the above circumstances, and various dyeing fastnesses of a fiber product dyed with a disperse dye composed of polyurethane elastic yarn and polyester fiber. The purpose is to improve the degree.

[0006]

According to the present invention, a fabric composed of polyurethane elastic yarn and polyester fiber is dyed with a disperse dye, and then combined with thiourea dioxide and sodium hydrosulfite as reducing agents to form a bath. And a reduction washing process. More specifically, thiourea dioxide is 3
g / l or more and sodium hydrosulfite 4 g /
In a reduction bath having a concentration of 1 or more and a pH of 11 or more, reduction treatment is performed at a treatment temperature of 60 ° C. or more and 100 ° C. or less, and a treatment time of 5 minutes or more and 30 minutes or less.
There is a processing method of finishing and setting in 0 seconds to 2 minutes.

[0007] The polyurethane elastic yarn used in the present invention is a heat-resistant and water-resistant polyurethane elastic yarn which does not deteriorate in mechanical properties against high temperature and high pressure dyeing (liquid heat 130 ° C × 60 minutes). Specifically, it is an elastic yarn obtained by spinning the following polymer composition mainly composed of polyurethane. Examples of the polyurethane in the present invention include polymers obtained by subjecting a prepolymer obtained from a polyol and an excess of organic diisocyanate to a chain extension reaction with a polyfunctional active hydrogen compound.

As the polymer diol, at least one of polyether glycols such as polytetramethylene glycol and polyethylene propylene glycol, ethylene glycol and 1,6-hexane glycol, and adipic acid, suberic acid, azelaic acid, Sebacic acid,
One or two polymer diols such as polyester glycols, polycaprolactone glycol, and polyhexamethylene dicarbonate glycol obtained by reacting at least one of dicarboxylic acids such as β-methyladipic acid and isophthalic acid. The above mixture or copolymer can be exemplified.

As the organic diisocyanate, 4,
4-diphenylmethane diisocyanate, 1,5-naphthalene diisocyanate, 1,4-phenylene diisocyanate, 2,4-tolylene diisocyanate, 4,4
An organic diisocyanate such as dicyclohexylmethane diisocyanate or isophorone diisocyanate;
A species or a mixture of two or more species can be exemplified. Further, a small amount of triisocyanate may be used in combination.

[0010] These polyols and organic diisocyanates
The organic diisocyanate is mixed in a molar ratio of 1.5 to 3.0 so that the organic diisocyanate is in excess, and reacted at a temperature of 60 to 120 ° C to obtain a prepolymer. The obtained prepolymer is cooled to 40 ° C. or lower and dissolved in a polar solvent such as N, N-dimethylacetamide or N, N-dimethylformamide to obtain a prepolymer solution.

The acidic substance added between the end of the prepolymer reaction and the start of the chain extension reaction is such that the acid dissociation index in N, N-dimethylacetamide or N, N-dimethylformamide is 10 or more. It is selected from carboxylic acid and carbon dioxide, and examples thereof include acetic acid and carbon dioxide.

Examples of the polyfunctional active hydrogen compound include ethylenediamine, hexamethylenediamine, xylylenediamine, 4,4-diphenylmethanediamine, hydrazine, ethyleneglycol and the like, or a mixture of two or more thereof. If desired, a small amount of a terminator such as monoamine or monoalcohol may be used in combination with these compounds. Preferred are diamines alone and those mainly composed of diamines.

[0013] The method of spinning the polyurethane-based composition into an elastic yarn is not particularly limited, but it is preferable to dry spin the polyurethane composition solution. Constituents other than polyurethane constituting the polyurethane-based composition include a leveling agent, an ultraviolet absorber, a stabilizer such as an anti-yellowing agent, a pigment, an antistatic agent, a surface treatment agent, a flame retardant, a reinforcing agent and a chlorine deterioration inhibitor. Can be illustrated. In particular, as a chlorine deterioration inhibitor,
Examples thereof include metal oxides and metal hydroxides such as magnesium oxide, zinc oxide, aluminum oxide, magnesium hydroxide, zinc hydroxide, aluminum hydroxide, and hydrotalcite-based compounds. These may be used alone or in combination of two or more. It may be a mixture. Particularly preferred are magnesium oxide or zinc oxide. The addition to these polyurethane solutions is not particularly limited, but the average particle size is 0.05 to 3 μm.
Is preferably added as fine particles.

The polyester fiber in the present invention is:
It is a polyester fiber known to those skilled in the art,
Filament fibers obtained by melt-spinning ordinary polyethylene terephthalate or polyethylene terephthalate-based fibers into which an ionic dye dyeable group is introduced.

The polyurethane elastic yarn used in the present invention is usually used in the form of a covering yarn or a bare yarn.
The textile product in the present invention includes all textile products such as cloth, clothing, socks, etc. The form of the textile may be any of woven fabric, knitted fabric, non-woven fabric and the like.

In the present invention, a commercially available disperse dye is used for dyeing using a disperse dye, and the dyeing temperature is from 100 ° C. to 1 ° C.
In a range of 40 ° C. and a dyeing time of 10 minutes to 120 minutes, it can be carried out by a batch system or a continuous system using an apparatus such as a winch, a zicker, a beam, and a jet dyeing machine.

In the present invention, the conditions of the steps such as scouring and desizing, relaxing, pre-setting, and finishing setting are appropriately selected depending on the form and structure of the fabric.

In the reduction washing in the present invention, it is important to use a combination of thiourea dioxide and sodium hydrosulfite as a reducing agent, and to treat in a single bath under alkali to reduce the temperature and time of the finishing set. ,
In the treatment, it is desirable to use a nonionic or cationic compound as a surfactant. The use concentration of the surfactant can be used in the range of 0.5 g / l to 5 g / l.

[0019]

The present invention will be described below with reference to examples. However, the present invention is not limited by these examples. The evaluation method used in the present invention is shown below. (A) Washing fastness Based on JIS-L0844 (A-2 method). (B) Dry cleaning fastness Based on JIS-L0860 (petroleum). (C) Transfer sublimation fastness According to the JIS-L0854 method, the surfaces of the contaminated cloth were combined using a polyester white taffeta treated with a urethane resin, and the contaminated cloth was treated at 70 ° C. under a load of 0.2 kg / cm ² at 15 ° C.
After standing in a hot air drier for a period of time, the degree of contamination of the contaminated white cloth was graded using a gray scale for contamination.

A 28-gauge two-way tricot warp knitted fabric made of 40 denier 4 filament polyurethane elastic yarn and 50 denier 36 filament polyester fiber was prepared, scoured and relaxed by a conventional method.
After presetting at a temperature of 195 ° C. for 50 seconds to 60 seconds using a pin tenter, a jet dyeing machine [Circ
ular NX].

<Dyeing Formulation 1> Disperse Dye Disperse Black PSD [BASF] 8% owf Dispersion leveling agent Mignol 802 [manufactured by Ichisha Yushi Kogyo Co., Ltd.] 1 g / l pH adjuster 0.5 g / l acetic acid, sodium acetate 0. 2g / l Temperature x time 130 ° C x 60 minutes Bath ratio 1:20 <Dyeing formula 2> Disperse dye Dianix Tuxedo Black Hconc. Liq. [Dystar Japan] 12% owf Disperse leveling agent Mignol 802 [One company 1 g / l pH adjuster 0.5 g / l acetic acid, 0.2 g / l sodium acetate Temperature x time 130 ° C x 60 minutes Bath ratio 1:20 After dyeing, washing with water followed by reduction washing with the following formulation Was done.

<Reduction cleaning 1> (Examples 1 and 2) Reducing agent Techlite [manufactured by Tokai Denka Co., Ltd.] 4 g / l sodium hydrosulfite 6 g / l alkali caustic soda flake 2 g / l cleaning aid amylazine D [Meisei Chemical Co., Ltd. 2g / l Temperature x time 80 ° C x 20 minutes Bath ratio 1:20

<Reduction washing 2> (Comparative examples 1 and 2) Reducing agent Techlite [manufactured by Tokai Denka Co., Ltd.] 4 g / l alkali caustic soda flake 2 g / l washing aid amylazine D [manufactured by Meisei Chemical Co., Ltd.] 2 g / l Temperature × Time 80 ° C × 20 minutes Bath ratio 1:20

<Reduction washing 3> (Comparative examples 3 and 4) Reducing agent Sodium hydrosulfite 6 g / l Alkaline Caustic soda flake 2 g / l Cleaning aid Aramazine D [Meisei Chemical Co., Ltd.] 2 g / l Temperature × time 80 ° C. × 20 minutes bath ratio 1:20

<Reduction washing 4> (Comparative examples 5 and 6) Reducing agent Sodium hydrosulfite 2 g / l Alkaline Caustic soda flake 1 g / l Cleaning aid Aramazine D [Meisei Chemical Co., Ltd.] 1 g / l Temperature × time 80 ° C. × 20 minutes (Repeat the above formulation twice) After reduction washing, rinse with water, and then finish set as 17
Dry heat setting was performed using a pin tenter at a temperature of 5 ° C. for a time of 50 seconds to 60 seconds. Table 1 shows various color fastnesses of the obtained fabric.

[0026]

[Table 1]

[0027]

According to the present invention, when a fabric composed of polyester fibers and polyurethane elastic yarns is dyed with a disperse dye and then subjected to reductive washing, the reductive washing is carried out according to a specific prescription. It is possible to provide a polyurethane-based elastic yarn-containing fiber product having excellent color fastness even when dyed.

Continued on the front page (51) Int.Cl. ⁶ Identification symbol FI // D06M 101: 32 D06M 13/40 101: 38

Claims (2)

[Claims] 1. A textile product comprising a polyurethane elastic yarn and a polyester-based fiber is dyed with a disperse dye, and then reduced and washed in a single bath using a combination of thiourea dioxide and sodium hydrosulfite as a reducing agent. Method for treating a polyurethane elastic yarn-containing fiber product. 2. After the reduction washing, the dry heat temperature is 175 ° C. or less,
The method for treating a polyurethane elastic yarn-containing fiber product according to claim 1, wherein the finishing is set in 0 seconds to 2 minutes.