JPS61138773A - Elastic processing of fiber cloth - 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 (Field of Industrial Application) The present invention relates to a method for elastically processing a polybutylene terephthalate fiber fabric.

(Prior Art) Fibers made of polybutylene terephthalate have been well known for some time, and methods for spinning the fibers have been disclosed, for example, in JP-A-48-31247 and JP-A-49-55920. There is.

Polybutylene terephthalate fiber has better elasticity than polyethylene terephthalate fiber, and is used in clothing that requires elasticity such as swimwear and training wear. However, to obtain even better elasticity, polybutylene terephthalate fiber Elastic processing is performed by adding silicone resin or the like to terephthalate fiber fabric. Applying a silicone resin to a stretchable fabric is a known technique as disclosed in Japanese Patent Publication No. 54-31120, but this method has the drawback that snagging of the fabric is likely to occur.

Snagging refers to a phenomenon in which fibers on the surface of a fabric are pulled out due to friction, etc. When this snagging occurs, the surface of the fabric becomes extremely dirty and loses its high quality value.

(Problems to be Solved by the Invention) The object of the present invention is to impart good stretchability to a polybutylene terephthalate fiber fabric without causing snagging, which is a drawback of conventional elastic processing.

(Means for Solving the Problems) The present invention involves immersing a fabric mainly made of polybutylene terephthalate fibers in an aqueous solution at 100 to 140°C containing a polycondensate of polyalkylene glycol and terephthalic acid. ``An elastic processing method for a polybutylene terephthalate fiber fabric,'' characterized by the following.

Hereinafter, one aspect of the present invention will be explained in detail.

The polybutylene terephthalate fiber referred to in the present invention is
Mainly fibers made of polybutylene terephthalate, but also fibers made by partially copolymerizing polybutylene terephthalate with other chemical structural units.

For example, the term "sodium sulfoisophthalate di(4-hydroxybutyl)" is used to include fibers made of copolymerized sulfoisophthalic acid compounds such as di(4-hydroxybutyl) 5-sodium sulfoisophthalate.

The fabric used in the present invention is mainly a fabric made of polybutylene terephthalate fibers, but fabrics containing natural fibers such as wool and cotton, nylon, polyethylene terephthalate fibers, etc. in addition to polybutylene terephthalate fibers may also be used. good.

In the method of the present invention, a fabric mainly composed of the above-mentioned polybutylene terephthalate fibers is used.

Process in an aqueous solution containing a polycondensate of polyalkylene glycol and terephthalic acid.

Examples of the polyalkylene glycol include polyethylene glycol, polypropylene glycol, polybutylene glycol, and the like.

The molecular weight of polyalkylene glycol is 500-5000
If the molecular weight is less than 500, it is difficult to obtain the effects of the present invention.1 If the molecular weight is more than 5,000, it is poorly soluble in water and is inconvenient for work.

The degree of polycondensation between polyalkylene glycol and terephthalic acid varies depending on the type of alkyl group and the molecular weight of polyalkylene glycol, but it is preferable that the average degree of polycondensation is in the range of 3 to 12. Outside this range, the effect of the present invention will not be achieved. is difficult to obtain.

When treating a fabric mainly composed of polybutylene terephthalate fibers in an aqueous solution containing a polycondensate of polyalkylene glycol and terephthalic acid, the amount of polycondensate of polyalkylene glycol and terephthalic acid used is 0 based on the weight of the fiber. It is desirable that it is .05% or more. Usage is 0
．． If it is less than 0.05%, it is difficult to obtain the effects of the present invention.

Further, the treatment temperature should be in the range of 100°C to 140°C, and if the temperature is below 100°C, good stretchability cannot be obtained. If the treatment temperature is 140° C. or higher, defects such as embrittlement of the treated fabric will occur.

The treatment time may be appropriately selected depending on the structure and form of the fabric, but it is usually within the range of 10 minutes to 60 minutes.

In the treatment method of the present invention, dyes, dyeing aids, etc. are added to an aqueous solution containing a polycondensate of polyalkylene glycol and terephthalic acid, and the treatment is performed at an appropriate temperature and time. It is also possible to carry out staining at the same time.

(Function) How is it possible to impart good elasticity to polybutylene terephthalate fiber fabric without causing snagging according to the method of the present invention?

Although the detailed reason is not necessarily clear, the present inventors speculate that the reason is as follows.

In other words, the conventional elastic processing using silicone resin forms an elastic silicone polymer on the fiber surface to obtain elasticity, but silicone resin has the property of extremely reducing friction between fibers. This makes it easy for the fibers to fall out and cause snagging, but the polycondensate of polyalkylene glycol and terephthalic acid used in the method of the present invention penetrates into the interior of the polybutylene terephthalate fibers. Since it further improves the elasticity of the fiber itself, it does not have a large effect on the fiber surface, and is therefore not likely to cause snagging.

(Example) Next, the method of the present invention will be explained in detail with reference to Examples. In the Examples, the performance of the fabric was measured and evaluated by the following method.

(1) Elongation rate and elongation recovery rate JIS-L-1080 constant speed elongation method and JIS-L-
According to 1096.

(2) Snasogging JIS-L40761CI type pilling tester A rubber tube (JIS-L-1079A method) with a sample wrapped around it is inserted into a knot with one "hacksaw" attached to the top and bottom of a cork basket. After operating for 5 hours, the samples were compared with standard photographs and evaluated from grade 1 to grade 5.

(Snasogging occurs less frequently in grade 5.

Example 1 Polybutylene terephthalate fiber 50 d/24 f
A 28-gauge interlock knitted fabric using false-twisted yarn of Inside 13
Treatment was performed at 0°C for 30 minutes, followed by drying and heat setting. The performance of the obtained knitted fabric was measured and evaluated, and the results are shown in Table 1.

For comparison with the present invention, a blank comparative sample (hereinafter referred to as Comparative Example 1) was obtained by performing the same treatment as in this example except for removing the polycondensate from the aqueous solution.

In addition, the knitted fabric of Comparative Example 1 was coated with Poron MF-20 (Shin-Etsu Chemical ■
(silicon resin) 50 g/l aqueous solution, further squeezed uniformly at a squeezing rate of 100%, and dried at 9160°C.
A comparative sample (referred to as Comparative Example 2) knitted fabric was obtained by the conventional method by heat setting for 30 seconds.

The performance of the knitted fabrics of Comparative Example 1 and Comparative Example 2 was measured and evaluated, and the performances are shown in Table 1.

As is clear from Table 1, the knitted fabric obtained by the method of the present invention had excellent stretchability and was found to be good in snagging.

Example 2 Polybutylene terephthalate fiber 50 d/24 f
false twisted yarn and polyethylene terephthalate fiber 50d
/28G truffle made by alternating knitting of 24 f false twist processing system.
After scouring this knitted fabric, it was treated in a treatment bath of the following formulation 1 at 130° C. for 30 minutes.

Prescription I Dlanix Blue U-3R2%owf (disperse dye manufactured by Mitsubishi Kasei ■) 1'-7 Kasansolt RZ-8F 0.5
g/1 (Dispersant manufactured by Nicca Chemical ■) Glacial acetic acid 0.2cc/1 Polycondensate of polyethylene glycol with a molecular weight of 2000 and terephthalic acid (average molecular weight 7000) 0.5χowf
Next, drying and heat centrifugation were performed. The performance of the obtained knitted fabric was measured and evaluated, and the results are shown in Table 2.

As is clear from Table 2, the knitted fabric obtained by the method of the present invention had excellent elasticity and was found to be resistant to snagging.

(Effects of the Invention) The present invention provides a polybutylene terephthalate fiber fabric with a polycondensate of polyalkylene glycol and terephthalic acid, and the method of the present invention allows for good expansion and contraction without causing snagging. properties can be imparted to fabrics mainly composed of polybutylene terephthalate fibers.

Moreover, the obtained knitted fabric has a soft texture.

Furthermore, since the treatment of the method of the present invention can be carried out simultaneously with dyeing, unlike conventional methods, the number of steps is not increased and it is economical.

Claims (1)

[Claims] (1) A polybutylene terephthalate fiber fabric, which is characterized by immersing a fabric mainly made of polybutylene terephthalate fiber in an aqueous solution at 100 to 140°C containing a polycondensate of polyalkylene glycol and terephthalic acid. Elastic processing method.