JPS60224883A - Color densifying treatment of polyester 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 Field of Application) The present invention relates to a treatment method for improving the depth of color of dyed polyester fiber structures.

(Prior Art) Synthetic IIN, especially polyester fibers, are widely used due to their excellent functionality and texture. However, their major drawback is that they are flame retardant, as well as natural fibers such as wool and silk. $1. Compared to semi-synthetic fibers such as rayon and acetate, it is inferior in clarity, depth of dark color, especially black depth, and color development. This drawback is due to the fact that polyester-based MTGT is dyed with a disperse dye with poor clarity, and the refractive index of polynisrutile-based fiber is about 1.7, which is higher than other IINs and causes light to scatter easily. As a solution to these problems, modifications have been made to polyester fibers to introduce seats that can be dyed with vivid dyes such as cationic dyes and acid dyes. The rate-based light scattering is not reduced and there is essentially no improvement in color depth. On the other hand, it is known that if the fiber surface is coated with a compound with a low refractive index, the color will appear darker and the depth of the texture will increase. To date, methods have been proposed in which the fiber surface is coated with low refractive index compounds such as fluorine compounds and silicone compounds, but these have poor durability against dry cleaning, and in order to obtain a sufficient deep color effect, conventional methods are required. Even if a larger amount of the compound is applied than used in texture processing, no phase is formed, and even if a deep color effect is achieved, problems such as a change in texture and a decrease in the fastness of the dyed product occur.

JP-A-56-73175 proposes a method in which a water-soluble urethane prepolymer is applied to the fiber surface and then subjected to steam treatment, but this method causes a decrease in fastness, especially discoloration during washing and dry cleaning, and **decreased fastness. was the problem.

Furthermore, JP-A-56-112581 proposes a method of treating dyed fiber structures in a treatment bath in which a hydrophobic polymer with low refraction is emulsified or dispersed in the coexistence of an electrolytic substance. However, since it uses a hydrophobic polymer, there were problems with uniformity and reproducibility.

(Problems to be Solved by the Invention) As a result of studies to solve these drawbacks, the present inventors found that
We found that problems such as bath stability, white powder adhesion and speck formation due to tarring and precipitation can be effectively solved with a 111 two-component system using a water-soluble urethane prepolymer and an alkaline earth metal salt. did. Moreover, according to the method of the present invention, the prepolymer is efficiently and firmly exhausted on the surface of llll11, and a high deep coloring effect with uniformity and excellent reproducibility can be achieved.

(Means for solving the problem) A dyed polyester fiber structure is treated with a water-soluble urethane prepolymer and a water-soluble neutral alkaline earth metal salt.
A method for deep-coloring a polyester fiber structure, characterized by subjecting it to an in-bath treatment by immersing it in a component-based treatment bath.

(2) The deep coloring treatment method for polyester-based IIM according to claim 1, characterized in that an alkaline compound is added during bath treatment.

(Description of Means) The polyester-based woven II fabric as used in the present invention includes 11AIIIi produced by melt spinning from a normal fiber-forming polyester resin. In addition, the present invention is based on natural 1
It is also effective on dyed products made of 1AH, recycled fibers, semi-synthetic raett, other synthetic fibers, or mixtures of these fibers (mixed weaves, twisted twists, blended yarns, etc.).

In the present invention, the structure includes all types of structures such as tow, filament, yarn, woven or knitted fabric, and non-woven fabric.

The water-soluble urethane prepolymer used in the present invention is a hydrophilic urethane prepolymer in which isocyanate groups are blocked with bisulfite, and this urethane prepolymer is
For example, it is manufactured by the method described in Japanese Patent Application Laid-Open No. 50-108395.

For example, a block of propylene oxide and ethylene quaternary diol, or a urethane prepolymer made of a random copolymerized polyether diol and methylene diisocyanate or xylene diisocyanate, in which the free isocyanate groups are blocked with bisulfite, is used. can give.

The amount of the urethane used is preferably 0.1 to 10% (ratio to the total weight of the fibers) as a solid content adsorbed to the fibers.

The water-soluble urethane prepolymer is water-soluble and is efficiently absorbed onto the fiber surface by adding a neutral alkaline earth metal salt.

Such alkaline earth metal salts include 3e, Mg, and Ca.

3r, 3aJ (refers to a salt containing one of the metals in a as a cation, such as W1 salts, @ acid salts, nitrates of the above metals, and tin salts of these metals.Among such compounds, MOCI2, CaC12, Ba
cl 2 and their hydrates are practically preferred. The amount of the metal salt compound used is 0.5 to 0.5 to the total amount of the treatment liquid.
10 g/Ω is preferred.

0.5q10. If it is less than 1, there is no effect of improving color development, and if it is less than 1
Even if it is used in excess of 0 g/Q, the effect will not increase.

The treatment of the present invention is carried out by an immersion bath treatment method. It can be processed with dyeing machines normally used for dyeing, and the bath ratio is 1:5 to 1:1.
If the bath ratio is less than 1:5, uneven adhesion tends to occur, and if it is more than 1:100, the adhesion efficiency decreases. The treatment temperature may be appropriately selected within a practical range depending on the resin used, but generally a treatment temperature of about 30 to 60°C is possible. The exhaustion of the water-soluble urethane prepolymer of the present invention can be completed within practical time without the need for heating if the specific metal salt is used in combination.

In order to improve the durability of the exhausted polymer, it is necessary to further add and blend an alkaline compound into the treatment bath. The alkaline compound may be any compound that exhibits alkalinity in the bath. Examples include hydroxides and carbonates of alkali metals, alkaline earth metals, and ammonium salts, and weak acid salts such as 'W carbonates.

The amount of such compounds is 0.01 to 0.5 (
It is preferable to adjust the treatment bath so that the pl-1 of the treatment bath is approximately 8 to 10. The timing of addition of the alkaline compound is not particularly limited, but it is preferably added at a stage when the polymer has been exhausted to a certain extent. The urethane prepolymer absorbed onto the fiber surface by this alkali causes a self-crosslinking reaction, forming a strong film. As a result, durability was significantly improved. Durability is 120~ after treatment with water, dehydration, and drying
This can be improved by heat treatment at 180°C to improve the film strength.

(Examples) The proportions of various drugs in the examples mean percentages based on the fiber weight M unless otherwise specified.

Considering the bathochromic effect, the L value was used as a scale, and this value was measured using a digital meter made by Suga Test Instruments Co., Ltd. Lw
When l is a dark color, the value becomes tJ<smaller.

Example 1 A textured yarn fabric (cashmere skin) made of a polyester fabric having a length of 1 m was dyed under the following conditions.

Dianix 31ack BG-FS (Mitsubishi Chemical Industries) 12% Acetic acid (90%) 0.5cc/σ Sodium acetate 0.1a/Q After dyeing at 130°C for 60 minutes in a dye bath with a bath ratio of 1:30, the conventional method A black dyed product was obtained by reduction washing and water washing according to the following.

Using this dyed material, 10% (solid content 1.7%) of water-soluble urethane prepolymer Elastron "F-29" (Daiichi Raku Pharmaceutical Co., Ltd.) and water-soluble alkaline earth metal salt (A
) Mo C12・6H20, (B) Ca Cl 2 ・
2 G120. (C) Ba C12・2H20 was used as shown in the table below, and as a comparison amount (D>OLI CI 2
・2H201(E)Na C1, ('')K2 CO3
6 g/α of each were prepared, the bath ratio of the treatment bath was adjusted to 1:3o, and the treatment was performed at room temperature for 30 minutes. Thereafter, it was dehydrated and dried in a mangle without washing with water. Another 160
The color development was evaluated by dry heat curing at ℃ for 1 minute. The evaluation results are shown in the table below.

As is clear from the table, the products treated by the method of the present invention in which alkaline earth metal salts were added had a large effect of improving color development, and the texture was almost as good as that of the finished products. However, when other metal salts were added, little effect of promoting exhaustion of the water-soluble urethane prepolymer was obtained.

Example 2 A processed yarn fabric (double dicozet) of cationic dye-dyeable polyester fiber in which 2.4 mol % of the total structural units was ethylene 5-sodium sulfoisophthalate was dyed under the following conditions.

A 1zen Q athilon BlackC[)
-311-1 (Odugaya Chemical) 10% acetic acid (90% > 0.5cc/47 Sodium acetate 0.2Q/Q Dye at 120°C for 60 minutes at a bath ratio of 1:30, then reduce and wash according to the usual method A black dyed product was obtained by washing with water.

This dyed material was dyed with 15% (solid content 2.55%) and MgC12.
-50 in a bath containing 69/Q of 6H20 at a bath ratio of 1:30.
It was treated at ℃ for 30 minutes. Next, in this treatment bath, further f
Add 0.07g/Q of sJa 2 COs and heat at 50'C.
It was treated for 15 minutes. After the treatment in the bath ratio, the product was washed with water at room temperature for 10 minutes to remove unreacted urethane prepomer and MOC112. Thereafter, it was dehydrated, dried, and dry heat cured for 1 minute at 160° C., and its color development was evaluated.

Although Ll+II was 16.1 in the case of staining only,
When the treatment of the present invention was applied, the value was 13.2, indicating a remarkable effect of improving color development. In addition, regarding durability, washing 5 times
When the color development after washing was compared with and without Na2COs treatment, the L value was 13.2 before washing but decreased to 15.5 with the heat treatment, while it was 13.5 with the treatment.
2 and no decrease in value was observed.

Washing]: Using a 0.5% aqueous solution of Pazabupa (manufactured by Kao Soap Co., Ltd.: neutral detergent) at 40°C, spin it in a household washing machine (manufactured by Toshiba) for 10 minutes, dehydrate it, then wash it with water for 5 minutes. The operation of dehydrating for 1 minute is counted as one operation.

(Effects of the Invention) The treatment method of the present invention forms a film with strong adhesive strength on fibers, and provides a deep IIN structure with excellent washing resistance and dry cleaning resistance.

Claims (2)

[Claims] (1) A dyed polyester fiber structure is immersed in a two-component treatment bath of a water-soluble urethane prepolymer and a water-soluble neutral alkaline earth metal salt to perform an in-bath treatment. Deepening treatment method for polyester fiber #1. (2) A method for deep-coloring polyester fibers according to claim 1, characterized in that an alkaline compound is added during bath treatment.