JPS58120873A - Modification of polyester fiber - 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 modifies cationically dyeable polyester fibers. Generally, there are two methods for imparting pile-pilling properties to fibers: a method for preventing the formation of bulges, and a method for easily causing the bulges to fall off. The present invention relates to the latter method.

By the way, the conventional technology in this field includes a method for imparting anti-pilling properties to +1 myester fibers that can be dyed with cationic dyes [products containing fine cationic cross-material dyeable polyesters at pH 2.5 to Cationic dye-dyeable polyester ## characterized in that it is subjected to moist heat treatment with an acidic aqueous solution of 4.0 at 95 to 140°C for 20 minutes to 2 hours.
A method for modifying a dregs-containing product-1 (Japanese Unexamined Patent Publication No. 1983-46995) is provided. This method combines cationic dye-dyeable polyester, Jlj3,5-dicarbomethoxyphenylsulfonic acid, 4-nodiosulfonyl-3,5-dicarbomethoxyphenylsulfonate, etc. Sulfuric acid, hydrochloric acid, phosphoric acid, and formic acid are used to make fibers made of copolymers that have added acidic groups to polyester by polymerizing them.

pi+2.5 consisting of acids such as acetic acid and citric acid and their salts
However, when this method is used, it is a method of soaking in a treatment bath of 4.0-4.0% Yaburiba solution at a temperature of 95-140°C and a treatment time of 20 minutes to 2 hours, followed by moist heat treatment. (1) Regarding pH concentration, there is a limit on j-1 acidity of pH≧2.5, which is a constraint when it is desired to impart remarkable anti-build properties to cationically dyeable polyester fibers. (2) The treatment temperature can also be limited to a range of 95 to 140° C. due to the acidity and treatment time. (3) The processing time is very long, requiring 20 minutes to 2 hours, and is incompatible with 3M's current trend of increasing speed and improving productivity.

The inventors of the present invention aimed to solve these problems, and as a result of extensive studies, they arrived at the present invention as a method for solving these problems all at once.

That is, in the present invention d, cationic dyeable polyester fiber is
Wet with an acidic aqueous solution under H3, 51 AJ and heat at 145°C.
A method for modifying polyester fibers, which comprises performing high-frequency heat treatment at the above temperature for 0.5 to 10 minutes.

Here, as the cationic dyeable polyester fiber, for example, modified polyethylene terephthalate flat yarn copolymerized with 5-sodium sulfoisophthalic acid can be used, but in addition, 3.5-dicarbomethquine phenylsulfonic acid soda = Examples include. These compounds are usually introduced in a 1 to 6 molar amount, but furthermore,
For example, polyalgylene glycol, polyalkylene oxide, sodium argylsulfonate, etc. may be copolymerized or blended.

In addition, polyester fiber melts terephthal ef as the main acid component, preferably 1% of alkylene glycol having 2 to 6 carbon atoms, namely ethylene glycol, triethylene glycol, tetramethylene glycol, pentamethylene glycol, hexamethylene glycol, ethylene It is a fiber made of polyester whose main glycol component is at least one type of glycol selected from glycol or tetramethylene glycol. It may be a polyester in which a part of the terephthalic acid component is replaced with another difunctional carboxylic acid component, or a fiber made of a polyester in which a part of the glycol component is replaced with a diol component other than the above-mentioned glycol. good.

Examples of difunctional carboxylic acids other than terephthalic acid used here include isophthalic acid, naphthalene dicarboxylic acid, and diphenyl dicarboxylic acid.

Diphenoxyethanedicarboxylic acid, β-okineethoxy7
These are difunctional carboxylic acids such as aromatic, aliphatic, and alicyclic carboxylic acids such as benzoic acid, p-oxybenzoic acid, 7-divic acid, sebacic acid, and 1,4-chlorohexanedicarboxylic acid. Diol compounds other than glycol include aliphatic and alicyclic compounds such as λfuclohexane-1,4-dimethazole, neohentyl glycol, bisphenol A, and bisphenol S.

Aromatic diol compounds may also be used.

For the form d of the cationic dyeable polyester fiber, a normal flat yarn with a round cross section is usually used, but a yarn with an irregular cross section may also be used, or a polyester fiber made porous by chemical treatment may be used. Alternatively, cationic dyeable polyester fibers and cotton may be blended or interwoven.

The form of the article to be treated may be treated with the above-mentioned flat yarn 1-, but it may be woven or knitted into a fabric, and then
It is preferable that the treatment incorporates the stabilization of -If. stomach.

The acidity of the treatment solution needs to be below pH 3.5 J'-1. By setting the pH to 3.5 J or less, it is possible to impart pile building properties to the fibers. Preparation of an aqueous solution with a pH of 3.5 or less -4- As the VC, any acid, either an inorganic acid or an organic acid, may be used as long as it does not impair the purpose of the present invention. Preferably M acid or acetic acid.

These are citric acid and oxalic acid. However, hydrochloric acid and phosphoric acid.

Commonly used inorganic acids such as sulfuric acid and boric acid may also be used. l) In order to maintain the H value within a certain range,
It is desirable to use a buffer solution consisting of and its salt. For example, formic acid and formic acid soda base.

Or &, 1: A buffer solution consisting of acetic acid and an acid-sodium base is preferably used.

Wetting can be achieved by continuously spraying the fabric to which the acidic aqueous solution is to be transferred, or by continuously immersing the fabric in the acidic aqueous solution.
Smaller is better. In the case of the tomato spray method, the device may be made of ceramic material such as a tiled surface 1, which sprays an acidic water bath solution and spreads the fabric.

The treatment temperature with the acidic aqueous solution must be 1.145° C. or higher. If the temperature is not yet 145°C, the processing time can be shortened by 9 times. The greatest feature of the present invention is that the reforming treatment can be carried out quickly at high temperatures and within a short period of time. It is necessary to use high frequency heating for heating during tS of the reforming treatment. In normal contact heating using electric heat, the heating plate is easily softened by acid and cannot withstand 1111 (dI) for a long time.

Non-contact heating can significantly reduce the degree of corrosion caused by acids, but corrosion cannot be avoided.

1. For non-contact heating, electricity.

1. Use superheated steam Izu Jl as a heat source. Even if it is used, it requires a large amount of energy, so it is not a preferable method from the viewpoint of energy efficiency.

Cationically dyeable polyester! & After soaking in an acidic water bath solution with a pH of 3 and 51'J, it was heated to 111 with high frequency heating.
Processing time for embedding, type of lace material, pH value,
Since it varies depending on the degree of processing M, the optimum required time should be determined as appropriate from the combination K of these payment factors, but the time in the range of 0.1 to 10 minutes is my own. 0. If the temperature is less than 145℃, the temperature of the fiber and the acidic aqueous solution in which the fiber is soaked is 145℃.
It is difficult to raise the temperature to a temperature higher than 2, and therefore it is not desirable to impart building properties to the fibers.

If the time exceeds 10 minutes, the temperature of the cord may rise due to extremely high temperatures, and other properties inherent to the fiber such as texture, heat shrinkage rate, etc.
Furthermore, if it is a rod end, it is a strong elongation.

There may be cases where basic mechanical properties such as modulus are impaired.

The present invention will be specifically illustrated below using actual Mi examples. The anti-pilling properties of the fibers subjected to the modification treatment of the present invention were evaluated according to the method under Jl.

(1) Anti-Bill Rei.

JIST, 1 (17fi TQ type pilling tester, rotation speed 12 (1 (l r, T1.m, 30 minutes i3Ig
After testing, the pill incidence was determined.

(Also) 5th grade to 1st grade (defective). For practical purposes, grade 4 or above is required. .

(3) 1. Kuai This was determined intuitively by the feel of the modified product.

(Good) 0〉△〉×(Poor).

Examples 1 to 4 and Comparative Examples 1 to 7 Stable Fino of 01-dyed polyester<-(3,
0 tenier, 51non cut length)
After dipping and squeezing (pickup rate 70%) a 2/2 twill fabric using the following treatment solution (pickup rate 70%), sieve frequency heating was performed according to the treatment conditions shown in Table 1. Heat treatment was performed using a device. process? ζ, washed with water, dried 17 days (#) to determine the elasticity and pilling properties of the treated fabric.

The texture was rated 6f and the binding was 7" in Table 1.

Treatment liquid] (ayacryl Blue GSL (dhonkayaku:
Cationic dye) 2oy/l - Sodium alginate 17/l Urthoflic acid (pH adjuster) Sieve frequency heating condition output 5 Dawn frequency 2450 MHz -1〇 - 1 Table 1 --- 2- 11- 498-

Claims (1)

[Claims] Cationically dyeable polyester! #i fibers are moistened with an acidic aqueous solution with a pH of 3.5 or less, and at a temperature of 145°C or higher, 0.1
A method for preparing polyester frameworks characterized by high frequency heat treatment for ~10 minutes.