JPS5947473A - 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 relates to a method for surface modification of polyester fibers, and provides a method for improving the durability of the treatment effect when treating polyester lam products with low temperature plasma. The purpose is to

Polyester fibers are superior in properties such as strong strength9 dimensional stability, wash and wear properties, and quick drying properties.They are superior in properties such as antistatic properties, water absorption properties, and soil release properties compared to other fibers, especially natural fibers. It was inferior and had limited uses.

Therefore, are there various ways to improve these shortcomings? l'f
Among these, a new method of modifying the surface of polyester fibers by low-temperature plasma treatment is attracting attention as a method. According to this low-temperature plasma treatment, the type of gas that generates low-temperature plasma It is possible to vary the surface properties of the polymeric material being treated by changing the amount of oxygen-containing gas,
Polymers can be made hydrophilic by treating them with low-temperature plasma using gases such as oxygen, static electricity, and carbon dioxide, resulting in water absorption and soil release properties. In addition, adhesion can be improved by using gases such as A/I/Gon, Heliuno, etc., and water repellency can be obtained by using fluorine-based gases such as CF't.The same can be said for polyester fibers. Yes polynis T
Disadvantages of yv-based IEI fibers: antistatic property, water absorption 1:b
, Various low-temperature plasma treatment methods are being researched to improve soil release properties. Here, it is important that the improved surface properties of surface deposits, especially those for clothing, do not deteriorate even after wearing and repeated washing. Even if you go.

It is necessary that its performance does not deteriorate significantly.

However, the low-temperature plasma treatment I that has been studied so far
With surface modification technology for polyester W fibers, the performance of polyester W fibers significantly decreases due to repeated washing, and in extreme cases, performance may decrease even if the fibers are left inside. This is the reason why the modification method has not been widely put into practical use as a fiber processing method.

In order to solve these problems, the present inventors conducted intensive studies and found that when performing low-temperature plasma treatment on polyester fibers, the object to be treated with low-temperature plasma is first relaxed by dry heat or wet heat treatment, and then subjected to low-temperature plasma treatment again. The present invention was achieved based on the discovery that a surface modification effect with excellent durability can be obtained by treatment.

That is, one aspect of the present invention is to treat polyester fibers with low-temperature plasma, then relax with dry heat or wet heat, and then subject the fibers to low-temperature plasma treatment again. This is a method for modifying fibers.

The present invention will be explained in detail below.

In the present invention, the Borienether-based m-fiber is a 1118 polymerized polyester IV a containing polyethylene terephthalate or terephthalic acid and ethylene glycol as a third component.
V-fibers may be in the form of cotton, yarn, fabric, sheet-like molded materials such as non-woven fabrics, or other shaped materials. Also, what is low-temperature plasma?

Ar under low pressure? It is generated by causing a glow discharge in a gas such as hIOt, Cot, air, or CF'4.

A system in which gas particles are in a redundant and excited activated state.
It refers to what is called non-equilibrium plasma. In general, the method of generating low-temperature plasma is to evacuate and reduce the pressure of an empty container containing a sample using a vacuum pump, and then add gases such as Ar, O*, etc., alone or in a mixture, necessary for the desired processing effect, to create a vacuum. Introduced into the container and maintained at a constant degree of vacuum (e.g. (
1,1~2. [] Torr) and apply energy.2. Depends on the method of causing glow discharge. There are methods of applying electrical energy such as applying a high DC voltage or applying an AC voltage to the rrL poles installed in a vacuum container.1
0KHz to 2450 MHz high frequency 0.5 to 10K
Generally, it is applied with the output of III. An example of low temperature plasma treatment for the purpose of surface modification of polyester IR fibers is treatment under low temperature plasma treatment conditions 1 below.

Low-temperature plasma treatment conditions 1 Gas used: Air Gas flow rate: 1000 *Z/min Degree of vacuum: 0.5 Torr High frequency electric crab IL56 MHz I KW treatment time: 1 minute Polyester series treated under these conditions lR,I! greatly improves water absorption and soil release properties. However, when the treated polynisder fibers are washed repeatedly, their performance deteriorates, and in particular, the soil release property decreases significantly after 10 repeated washings compared to the initial state. If the low-temperature plasma treatment conditions are varied, the durability changes, but the durability cannot be improved enough to be suitable for practical use.

In the method of the present invention, the polyester type *, #Ie is first subjected to low-temperature Gufusma strips (low temperature at 'F)' according to the desired modification effect.
Process Wozuma. This treatment strip P[ may be used as long as the initial performance after treatment is obtained, for example, water absorption, soil jJ IJ-7
In terms of sex, there are two examples of Sen Cot, Nt, To○
, A/I: Using a 7-al gas, ! If the purpose is to make R water water oily, it may be treated using CF4 or the like. In the method of the present invention, after two series of low-temperature defusal treatments, the object to be treated at °C is subjected to a relaxing treatment in a dry heat or moist heat section. Here, the term "relaxation treatment" refers to treatment so that the mJ (5) chain that constitutes li, which has been subjected to low-temperature plasma treatment, is in the most ``noζ'' state.
Physically, the alternative is to heat it with dry heat or moist heat and leave it in a state with as little tension as possible.

Low-temperature plasma treatment only affects the surface of the object to be treated, and the treatment effect is in the range of several hundred people.
[The modification effect obtained by the treatment does not involve chemical changes only in the surface molecules that make up the fiber; surface molecules with modification groups rotate around the molecular chain or replace molecules on the inside. If the surface modification effect is lost, the surface modification effect will be lost. This is considered to be the reason why the low-temperature plasma treatment effects that have been studied so far have been inferior in durability. Therefore, in the present invention, the object to be treated with low-temperature plasma is kept as relaxed as possible and stabilized by C, that is, the rotation of the molecules or the exchange with internal molecules is sufficiently caused, and in this stabilized state, the object to be treated is treated again. The aim is to improve the durability of performance by performing low-temperature plasma treatment. To explain the more specific method of relaxation treatment, in the case of dry heat condition, 1
It is sufficient to process at 20℃ to 180℃ for 30 seconds to 2 minutes with as little tension as possible.
Treatment in saturated steam at 20°C for 30 seconds to 2 minutes or in hot water at 80°C to 100°C for 1 minute to 60 minutes;
4 mollets in hot water with extreme temperature and high pressure from 00℃ to 130℃ - Toichi -
For 4÷9-C-, the treatment may be carried out for 50 seconds to 10 minutes with as little tension as possible. In this case, if the treatment is performed while applying mechanical vibration, the relaxing effect can be further improved. Industrially, relaxers, show 1-loop dryers, liquid jet dyeing machines, etc. used in ordinary dyeing processes can be used. What is important here is that if you try to process this relaxation process within an industrially productive processing time (for example, 30 seconds to 60 minutes),
Processing should be carried out at a temperature below the secondary transition point of the processing worker, with as little tension as possible, and the temperature and time should be selected as appropriate depending on the equipment used and the type of desired processing effect. .

Although the object to be treated that has been subjected to the relaxation treatment as described above will once undergo a lowering of the reforming performance of the object that was first subjected to the low-temperature plasma treatment, in the method of the present invention, the object to be treated is then subjected to the low-temperature plasma treatment again. In this case, the low-temperature defusma processing conditions may be the same as those for the first processing, but may be changed to C depending on the processing purpose. In general, better results can be obtained by taking longer processing times than by first processing. The durability of the modification effect obtained in this way is surprisingly good, and compared to the conventional modification method using low-temperature plasma treatment and other general resin modification methods, the durability of the performance is significantly better. It was found that it indicates gender.

In addition, when even higher performance and durability are required,
This objective can be achieved by repeating the combination of the above-mentioned Riwoknu process and the subsequent Goodsma process two or more times.

The present invention will be explained in more detail below with reference to Examples, and the performance of the samples in the Examples was measured by the following method.

(1) Water absorption: The water absorption length (#1!) was measured after 10 minutes by the J-Technology S L 1096 Pyrex method.

b2) Soil lineability: Add 0.2 ml of B heavy oil to the sample.
After dripping and leaving for 20 hours, the stains were washed at home and the residual state of the stains was graded on a five-point scale from grade 5 (good) to grade 1 (poor) using the Blaze scale for contamination.

Example 1 Polyester processed yarn fabric (warp 150d, weft 150d
/2; M yarn density 110 threads/inch, aA density & 55 Kazushi) was prepared after scouring, dyeing and drying, and it was divided into 9 equal parts [Samples A1 to A9 were attached to each part]. Sample A4 was subjected to low-temperature plasma treatment under the following low-temperature plasma treatment conditions A. I went 4,
th: Samples AI and 2r3 were subjected to the following low-temperature plasma treatment conditions A, B, and C, respectively, without performing the following post-process θL JW. 42 as a comparison sample.

Low-temperature plasma treatment conditions A: Gas used: 20! Gas flow nail: 100 ml/m1. n Degree of vacuum: 0.7 Torr High frequency: 15.56 MHz IKN Processing time = 30 seconds Low temperature plasma treatment condition B Gas used: ○ Gas flow M: 100 F//mj, n Degree of vacuum: 0.
7 Torr High frequency: 13.56 MHz I KW processing time: 1
Minute low temperature Pfusma processing conditions C Used gas = Of Gas flow JFk: 10'O*l/min Vacuum degree: 0
．． 7 Torr High frequency: 13.56 MH21n Treatment time: 20 minutes Following the first low-temperature Gwozma treatment, sample point 4.5,
Sample No. 6.7 was subjected to the relaxation treatment described below.

Washing 4 and A5 samples were treated for 20 minutes with stirring in 100C water as Fuchs treatment (I treatment), &6
The sample was treated with a continuous refluxer at 80C, 451 II.
The sample of untreated s A7 was 16 in show loop defire.
00 was treated with "C" for 2 minutes (@ treatment). After each was dried, the sample in room 4 was subjected to low-temperature defusma treatment under the above-mentioned low-temperature plasma treatment condition A, and the samples A5 to 7 were subjected to low-temperature defusma treatment under the above-mentioned low-temperature plasma treatment condition B. The performance of the obtained treated product and the performance after repeated washing were measured, and the results are shown in Table 1.

Note that sample point 9 is a comparative sample that is not subjected to any treatment.

It is clear from Table 1 that (U+ (conventional addition, 1: 11-
Sample points 1, 2, which are culms. In 3, Tff! After pH 0
μ is excellent though.

The durability is poor, and after 30 washes, the 1flj performance is very close to that of no treatment (sample & 9).

As can be seen from the performance and durability of sample 43 (treatment time 20 minutes), even when the low-temperature defuma treatment time was prolonged, there was almost no effect on improving durability. On the other hand, samples of flat sizes 4 to A7 obtained by the method according to the present invention not only had better performance after treatment, but also had extremely improved durability, which had been a problem in the past, and were always excellent. It can be seen that it has a performance that has not been achieved before.

Therefore, according to the method of the present invention, the water absorption and jelly release properties of boester-based IR fibers, which were conventionally used for clothing and had limited use due to insufficient performance, have been improved in terms of their durability, and their uses have been greatly expanded. can be expected. In addition, it has been improved in applications other than clothing, and its performance can be utilized for a variety of applications.

For comparison, samples were simply left at room temperature (for 24 hours) without relaxing treatment after treatment with the low-temperature plasma treatment B.
The performance of the sample treated with low-temperature goods under the same conditions is shown as A8.

As can be seen from Table 2, in this case, the durability can be slightly improved compared to the one-time low-powage treatment, but compared to the method of the present invention, the durability is 11'' for l'1'*l: is i
t, which was far inferior.

In particular, the Applicant Unitika shares will be released soon.

Claims (1)

[Claims] (1) A method for modifying polyester/L'-based war fibers, which comprises subjecting polyester fibers to low-temperature plasma treatment, followed by relaxing treatment in dry heat or wet heat conditions, and then subjecting the 1 m fibers to low-temperature plasma treatment again.