JPS6094676A - Treatment of modified polyester fiber product - 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 The present invention relates to a method for treating modified polyester fiber products, and more particularly to a treatment method for preventing pilling of modified polyester fiber products.

Polyester fibers have excellent physical properties that natural fibers such as cellulose fibers and wool do not have, such as excellent dimensional stability, wrinkle resistance, strength and elongation, and are therefore widely used for clothing, industrial materials, etc. However, because of their high strength and elongation, they tend to cause pilling especially when short fibers are used for clothing, which has the drawback of significantly impairing the quality of appearance and feel. The tendency for pilling to occur differs depending on the texture, and although it is usually not so noticeable in plain woven fabrics, it is particularly noticeable in twill woven fabrics, satin woven fabrics, and knitted fabrics, making commercialization difficult.

Conventionally, various proposals have been made for preventing pilling of polyester fibers. Pilling prevention methods can be roughly divided into methods that treat the fabric with synthetic polymers to prevent single fibers from being pulled out of the tissue, methods that reduce fiber strength during the fiber manufacturing stage or post-processing, and even if pilling occurs, it is the same as natural fibers. There are known methods to make it fall off quickly. However, the former method not only suffers from structural limitations and changes in texture due to the addition of synthetic polymers, but also has insufficient durability, making it impractical. Therefore, the latter method has mainly been proposed. However, if the strength is lowered by lowering the degree of polymerization at the fiber manufacturing stage, there will be quality and operational problems due to frequent yarn breakage during spinning, and productivity will be reduced due to the inability to increase the spindle rotation speed due to decreased spinnability during spinning. There is a limit to the reduction in the degree of polymerization because of the drawbacks such as reduction in the degree of polymerization, and it is impossible to obtain satisfactory pilling prevention. In particular, the effect is completely insufficient for high value-added products such as twill weave, satin weave, and raised products thereof, which are prone to pilling. On the other hand, as a method for preventing pilling due to a decrease in the degree of polymerization due to post-processing, many methods using amines or acids have been proposed, such as those disclosed in Japanese Patent Publication No. 8 B-247. However, the reality is that none of them have been put into practical use due to lack of efficacy or drawbacks arising from the drugs used. Zunawaji, especially in the case of amines that have a strong anti-pilling effect, usually requires a large amount of amine to obtain the desired anti-pilling effect, which not only causes problems such as odor and discoloration, but also makes it difficult to reproduce the effect. It has disadvantages such as being inferior.

The inventors of the present invention have arrived at the method of the present invention as a result of intensive research in order to solve the drawbacks mentioned above and obtain a good pilling prevention effect without any reduction in productivity during fiber manufacturing and spinning processes. . That is, the present invention provides an alkylene terephthalate polyester comprising as copolymerization components an ester-forming component (A) containing a metal sulfonate base and an ester-forming component (B) not containing a metal base sulfonate, which has an alkylene terephthalate composition. From an alkylene terephthalate polyester containing 1 to 6 mol% of component (A) and 8 to 20 mol% of component (A) and component (B) in total, based on all repeating units of the polyester. The textile product is scouring and bleaching using a scouring bleaching solution having a pH of 8 to 12, and then subjected to a moist heat treatment using an aqueous solution having a pH of 2 to 6.

To explain the treatment method of the present invention in detail below, the modified polyester fiber used in the present invention contains an acid component mainly (80 mol% or more) of terephthalic acid or its ester-forming component, ethylene glycol, tetramethylene, etc. An alkylene terephthalate polyester obtained from a glycol component mainly (80 mol% or more) such as glycol, 1゜4-cyclohexane dimetatool, etc., in which sulfonic acid metal base-containing ester is added to all repeating units. A modified polyester containing 1 to 6 mol % of the forming component (A) and 8 to 20 mol % of the component (A) and additional components (B) other than the above is spun and drawn, and if desired, heat jetted. It is a modified polyester fiber obtained by

Examples of the sulfonic acid metal base-containing ester-forming component (A) include 5-sodium sulfoisophthalic acid, sulfosuccinic acid, and 4-sulfonaphthalene-2,7
In addition to acid components such as -dicarboxylic acid and 5(4-sulfophenoxy]isophthalic acid, sulfonic acid metal base-containing glycols and the like may be mentioned, with 5-sodium sulfoisophthalic acid being particularly preferred.

Further, as the additional component (B), acid components such as isophthalic acid, adipic acid, sebacic acid, glutaric acid, diethylene glycol, diethylene glycol, molecular weight 10
Among them, isophthalic acid and polyether glycol are preferred, and polyether glycol represented by the general formula (1) is particularly preferred.

HO(CIH*l□+mR-0+CjHxjO+nH・
...(1) (wherein R is a divalent hydrocarbon group having 4 to 20 carbon atoms, m and n are the same or different integers, and 1≦m and n≦1
5.1, j is an integer from 2 to 4. ) The additional component (B) may be produced by dehydration condensation of alkylene glycol in the polycondensation step of polyester, but it is usually preferable that the amount of component (B) is 6-2 mol % or more. If components (A) and (B) deviate from the above range and are below the lower limit, it will be difficult to obtain the desired excellent anti-pilling properties under the mild treatment conditions of the present invention, while if they exceed the upper limit, it will be difficult to control the treatment. This results in disadvantages in that not only the anti-pilling properties obtained tend to vary, but also the physical properties of the fibers deteriorate. In addition, the intrinsic viscosity of modified polyester fiber (phenol/tetrachloroethane 6
/4 weight ratio, measured at 80°C) is preferably about 0.85 to 0.6. Specific examples of R in the above formula (1) include linear aliphatic hydrocarbon groups such as +CHr)-6, aliphatic hydrocarbon groups having side chains such as Cfh-C-CH2-, Which can be mentioned. In addition, modified polyester fiber products include not only modified polyester fiber products alone, but also products in which modified polyester fibers are mixed with other fibers such as regular polyester fibers, synthetic fibers such as polyurethane fibers, cellulose fibers, and natural fibers such as wool. It also includes. The textile product may be a yarn product, a fabric-like product, a tape-like product, a raised product, a rug, a sewn product, or any other type. Further, the form of mixing with other fibers may be arbitrary, such as blended spinning, mixed fibers, composite, mixed knitting and weaving, and multilayer structure.

In the present invention, the modified polyester fiber product has P H
Scouring and bleaching is performed using a scouring and bleaching solution of 8 to 12. Zunawaji, preferably at a pH of 95% by pH 8-12 treatment bath containing a peroxide bleach such as hydrogen peroxide and a scouring agent (penetrating agent), optionally a bleach stabilizer, and a gold-ion sequestrant.
It is treated for 9C or less, preferably 80-95'0, 15-120 minutes, preferably 80-90 minutes. However, the method is not limited to this, and a method of processing at a relatively low temperature for a long time may be used. The pH adjuster used may be a commonly used alkaline agent, such as alkali metal phosphates such as tribasic sodium phosphate and sodium pyrophosphate, sodium metaborate, sodium carbonate, and sodium silicate. Examples include weak acid salts of alkali metals, hydroxides of alkali metals such as caustic soda and caustic potash, ammonium compounds such as ammonium ammonia hydroxide, organic quaternary ammonium hydroxides, and compounds that produce them. Note that if the pH is less than 8, the treatment effect will be poor, while if it is more than 12, the strength and weight loss will be large.

Further, the moist heat treatment after scouring is performed with an aqueous solution having a pH of 2 to 6. When the pH is below 2, the strength decreases too much, while when the pH is above 6, the treatment effect almost disappears.

Examples of pH adjusting agents include organic acids such as formic acid, acetic acid, oxalic acid, tartaric acid, citric acid, succinic acid, maleic acid, and adipic acid; inorganic acids such as hydrochloric acid, nitric acid, sulfuric acid, and phosphoric acid; Examples include inorganic acid salts that give 6, organic compounds that produce acids upon decomposition, and the like. The treatment conditions are preferably higher than the scouring and bleaching conditions, usually at a temperature exceeding 95°C, particularly preferably at 97-180°C and a liquid heat treatment for 110-100 minutes. The bath ratio in the immersion treatment is 1:5 to 800,
Preferably l:10-100. Of course, the moist heat treatment may be performed simultaneously with dyeing and processing.

When the method of the present invention is used, excellent effects can be obtained even when the treated fabric, which has excellent anti-pilling properties and good feel under mild conditions, is applied to articles, and is particularly effective. In particular, when applied to a wool blend whose surface has been oxidized by active chlorine treatment, it has the advantage that the wool itself has excellent anti-build properties and further improved shrink proof properties.

The present invention will be explained below with reference to Examples, but the present invention is not limited to the Examples. Note that parts and percentages in Examples J are based on weight.

Example ゛l゛6-Nadriium sulfoi□ Sophthalic acid was used at a ratio of 8.6 mol% based on the total acid components, and diethylene glycol was set at a ratio of 2.5 mol% based on the total glycol components. A go's jersey knitted fabric of ethylene terephthalate-based modified polyester fiber obtained by spinning, stretching, and heat-setting the copolymerized modified polyester was knitted.

This knitted fabric was subjected to a scouring bleaching treatment for 90°060 minutes in a treatment solution having the following formulation.

<Treatment liquid> Hydrogen peroxide solution (85%) 10 parts Caustic soda 1 Hydrogen peroxide stabilizer 1 Sequestering agent 0.2 Penetrant (nonionic) 1 Water Remaining amount 1) PH 10.8 Then, after washing with water, A wet heat treatment was performed for 20 minutes at a bath ratio of 1:20.97°C in an acidic aqueous solution of phosphoric acid-sodium sulfate with a pH of 4, followed by washing with water and drying. It is shown in Table 1.

Table 1 Pilling property (grade): ICI pilling test By the method of the present invention, a knitted fabric product with a soft feel and good pill resistance was obtained.

Example 2 R in the general formula (1) is a 2,2-dimethylpropylene group, and the glycol component with m −1-n = 4, i, and j = 2 is 2 mol % and 5 sl based on the total glycol component.
・Rium sulfoisophthalic acid is 8 mol% of the total acid components
A 28G jersey fabric was knitted using a blended yarn of ethylene terephthalate-based modified polyester fiber and cotton copolymerized at a ratio of 1/80'S (50% modified polyester fiber/50% cotton). Circular dyeing machine Then, after heat treatment at 100°C for 20 minutes in an aqueous solution adjusted to pH 4.5 with acetic acid-sodium acetate, it was bleached, washed with water, and dried. The pill resistance of the obtained silk fabric was evaluated and the results are shown in Table 9J2.

Table 2 By the method of the present invention, knitted fabrics with a soft feel and good pill resistance were obtained.

Example 8 The knitted fabric used in Example 2 was treated in the treatment solution of Example 1 at a bath ratio of 1
: Processed for 80.90°060 minutes. Then PH4,5
It was cooked in an acidic treatment solution for 100'020 minutes, washed with water, dried, and heat-set. The anti-pilling properties of the obtained silk fabric were evaluated,
The results are shown in Table 8.

18-Table 8 A silk fabric with a soft feel and good pill resistance was obtained by the method of the present invention.

In addition, comparative examples treated with an acidic treatment solution without bleaching had rough and hard texture and poor anti-pilling properties of grades 8 to 4.

Patent applicant: Toyobo Co., Ltd. 14-

Claims (1)

[Claims] 1. Sulfonic acid metal base-containing ester-forming component (A
) and a sulfonic acid gold stripe base-free ester-forming component (B) other than the alkylene terephthalate component as copolymerization components, the (A) component being 1 to 6 moles based on the total acid component. %,
and 8 to 20 mol% in total of component (A) and component (B)
A method for treating a modified polyester fiber product, which comprises scouring and bleaching a fiber product made of an alkylene terephthalate polyester containing an alkylene terephthalate polyester with a scouring bleaching solution having a pH of 8 to 12, and then subjecting it to wet heat treatment with an aqueous solution having a pH of 2 to 6. . 2. Claim 9, wherein the scouring and bleaching conditions are at a temperature of 95°C or less, and the moist heat treatment is at a temperature of over 95°C.
A method for treating modified polyester fiber products as described in Section J1.