JPS6065180A - Modification of polyester fiber - Google Patents

Abstract

(57) [Abstract] 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 modifying polyester fibers using low-temperature plasma of polyethylene oxide and a non-polymerizable gas.

Compared to natural fibers such as cotton and sheep, polyester fibers have many superior properties such as strength, dimensional stability, wash-and-wear properties, and quick-drying properties, but they also have antistatic properties and water absorption properties. However, its use was limited due to its poor soil release properties. To date, various improvements have been attempted in order to improve these drawbacks, but very little has been achieved in terms of performance, particularly good washing durability. Also, even if one performance (e.g. antistatic property)
Even if the properties were satisfactory, other properties (for example, soil release properties) were poor, or color fastness and texture were adversely affected, resulting in insufficient performance.

In addition, since polyester fibers have poor reactivity and adhesive properties under normal conditions, methods using highly reactive treatment agents (for example, compounds containing eboxy groups) have been used, but these substances are toxic ( For example, it is carcinogenic), making it dangerous to use as a clothing material.

In addition to these methods, attempts have recently been made to modify the surface of polyester fibers by low-temperature plasma treatment, which is a very interesting method. Even if improvements could be made, it was still far from a perfect method, as it was not possible to make the antistatic property and antistatic performance have washing durability.

The present invention was made in view of the current situation, and aims to provide polyester fibers with antistatic properties, water absorption properties, and soil release properties that are durable against washing. In order to achieve this object, the present invention has the following configuration.

That is, the present invention uses polyester fibers with an average molecular weight of 30.
0 to 2000 polyethylene oxide is applied, and then the fiber is treated in a low-temperature plasma atmosphere of a non-polymerizable gas such as air, nitrogen, oxygen, or argon while being maintained at a temperature above the secondary dislocation point of the fiber. This is a method for modifying polyester fibers.

The present invention will be explained in detail below.

In the present invention, polyethylene oxide having an average molecular weight of 300 to 2,000 is first applied to polyester fibers.

In the present invention, the polyester fiber refers to polyethylene terephthalate fiber or polyester fiber made by copolymerizing terephthalic acid, ethylene glycol, and a third component such as isophthalic acid. It may be in the form of

The average molecular weight of the polyethylene oxide used in the present invention is preferably in the range of 300 to 2,000.

If the average molecular weight is less than 300, polyethylene oxide will be vaporized and removed during low-temperature plasma treatment, whereas if the average molecular weight exceeds 2000, the resulting fabric will tend to have poor antistatic properties, which is unsuitable.

Polyethylene oxide for polyester fibers (
Although the amount of adhesion of the pure component varies slightly depending on the plasma treatment conditions in the subsequent process, it is usually 0.5 to 0.3 weight percent.

Polyethylene oxide can be applied to polyester fibers by applying an aqueous solution thereof using a pad nip method.

It is best to use the spray method. After application, dry.

Next, in the method of the present invention, a low-temperature plasma treatment is performed to fix polyethylene oxide to the polyester fiber, but what is important in this step is to keep the temperature of the polyester fiber at a temperature higher than the secondary dislocation point of the polyester fiber. (i.e. 85 degrees or higher for polyethylene terephthalate fiber)
The point is that low-temperature plasma treatment is performed in a state where the temperature is maintained at a temperature lower than this, and if the treatment is performed at a temperature lower than this, the washing durability of the treatment performance will deteriorate, making it impossible to achieve the object of the present invention.

Furthermore, the treatment temperature must be such that the quality of the polyester fibers does not change, and specifically, a temperature of 170° C. or lower at which the fibers do not harden or change color is preferable.

The type of gas used for low-humidity plasma treatment may be any non-polymerizable gas that does not cause plasma polymerization, such as air, oxygen, nitrogen, or argon; however, air or oxygen is usually sufficient in view of economic antistatic properties. Low-temperature plasma is generated by reducing the pressure in a container containing polyester fibers using a vacuum pump.
It is obtained by adjusting the pressure to 0.1 to 2.0 Torr and then applying electrical energy to cause a 5-glow discharge.

The electrical energy source at this time can be generated by adjusting the application of either DC voltage or AC voltage (I KHz to 3000 MHz), but generally 1300 MHz is used due to stability and uniformity of plasma generation, regulations of the Radio Law, etc. .56M
Hz is used. Output is 0.1-1.0 watt/ail
The performance targeted by the present invention can be achieved with a processing time of 10 to 180 seconds.

The present invention has the above configuration, and according to the present invention, antistatic properties and water absorption properties that are durable for washing.

Soil release properties can be combined with polyester fibers at the same time.

The present invention consists of: 1 applying polyethylene oxide, which has a molecular weight of 300 to 2000 and has no adverse effects on the human body and which is normally used as a wetting agent in cosmetics, to the surface of polyester fibers and subjecting them to low-temperature plasma treatment at a temperature above the secondary dislocation point; This allows the polyethylene oxide to firmly bond to the surface of the polyester fiber, resulting in extremely durable antistatic properties.

Polyester fiber 6- for water absorption and soil release properties We have discovered that it can be applied to

Next, the present invention will be explained with reference to examples, and the performance of the treated fabrics in the examples was measured by the following method.

(1) Washing durability (home laundry method (■ 1 dose (
1,3@/l) Washing process - washing, rinsing, water, drying (however.

In the case of repeated washing, drying is performed only after the final washing. ) (2) Antistatic property (temperature 20°C, humidity 40% R1+) Half-life: Measured by JIS L-1094A method.

Charge voltage: Measured by JISL-1094B method.

(3) Water absorption: The wicking length (mm) after 10 minutes was measured by the JIS L-1096 Byreck method.

(4) Fill release property: 0.2 m of B heavy oil on the material
j! Drop it, leave it for 20 hours, wash it at home, and grade the remaining dirt on the contamination gray scale (5 (good) to 1).
(Bad)) Shita.

Example 1 Polyester processed yarn fabric (warp 150d, weft 150d)
d/2 i Warp density 110/inch, weft density 55/
吋) After scouring, dyeing, and drying, prepare.

This has a molecular weight of 200. 300. 600.1000
．． Polyethylene oxides of 2000°5000 and 20000 were each applied in an amount of 2% based on the weight of the fabric by a pad drying method. Next, these fabrics were subjected to low-temperature plasma treatment under the following low-temperature plasma treatment conditions 1 while being maintained at 130°C.

Low temperature plasma treatment conditions 1 Gas used Air pressure I Torr High frequency frequency 13.56 Mllz High frequency output 0.5 W/afl Treatment time 60 seconds The fabrics subjected to the above low temperature plasma treatment are those after processing and 30 times After washing, antistatic properties, water absorption properties, and fill release properties were measured.

Table 1 9- The results are shown in Table 1.

As is clear from Table 1, in the case of the present invention method in which polyethylene oxide with a molecular weight of 300 to 2,000 is applied and low-temperature plasma treatment (treatment temperature: 130°C) is performed, the antistatic property is durable enough to withstand 30 washes. It was possible to obtain a fabric having water absorbency and soil release properties.

Example 2 In Example 1 above, a molecular weight of 6 was used as the agent for imparting to the fabric.
00 polyethylene oxide was subjected to low-temperature plasma treatment at 20°C, 60°C, 80°C, 100°C, and 1°C, respectively.
A fabric to be processed having the same specifications as in Example 1 was treated in exactly the same manner as in Example 1, except that the treatment was carried out at temperatures of 30°C, 150°C, and 170°C.

The treatment temperature was controlled by a method in which a roller was installed in the plasma atmosphere to pass the heated liquid, and the fabric was brought into contact with the roller.

The temperature of the fabric was measured by contacting the fabric with a thermocouple. The performance of the treated fabrics obtained before washing and after washing 30 times was measured and shown in Table 2-10.

As is clear from Table 2, the temperature of the fabric during low-temperature plasma treatment is the secondary dislocation point of polyester fibers (approximately 85
When the temperature was higher than (°C), the antistatic performance (washing durability) was very good, and good results were obtained.

Note that when the temperature exceeds 170°C, the texture of the fabric hardens and discoloration appears.

Patent Applicant Unitika Co., Ltd. Procedural Amendment (Own Ship 1, Indication of Case Patent Application No. 58-169991 2, Name of Invention Method for Modifying Polyester Fibers 3, Person Making Amendment Relationship to Case Patent Applicant Address 1-50 Higashihonmachi, Amagasaki City, Hyogo Prefecture 541 Address 4-68 Kitakyutabe-cho, Higashi-ku, Osaka Name Yu
Nichika Co., Ltd. Patent Department Telephone: 06-281-52
58 (Dial-in) = 1-4, "Detailed Description of the Invention" column of the specification to be amended.

5. Contents of amendment (r 0.3J on page 4, line 15 of the 11 specification to r 3
．． Correct with O.J.

2-

Claims (1)

[Claims] (1) Polyester fiber with an average molecular weight of 300 to 200
0 polyethylene oxide is applied, and then the fiber is treated in a low-temperature plasma atmosphere of a non-polymerizable gas such as air, oxygen, nitrogen, or argon while being maintained at a temperature above the secondary dislocation point of the fiber. Characteristic method for modifying polyester fibers.