KR0168191B1 - Preparation of easily dyeable polyester fiber - Google Patents

Abstract

The present invention is a method for producing a dihydrogen polyester fiber without a decrease in physical properties.

The conventional method contains a lot of diol components, so that the dyeability is improved, but the mechanical properties such as strength and elongation are severely reduced.

The present invention is a method for producing a co-polyester by adding a small amount of diol component to the polyester, that is 2 to 6% by weight and then spinning by a high-speed spinning method of 4,000 ~ 6,000m / min.

In the present invention, the prepared polyester fiber was dyed at normal pressure × 98 ° C. with a disperse dye, and the dyeing ratio was 88% or more, the strength was 3.8 g / d or more, and the elongation was 57% or more.

Description

Manufacturing method of chlorinated polyester fiber by high speed spinning

The present invention relates to a method for producing a dichroic polyester fiber by high speed spinning. More specifically, the present invention relates to a method for producing a dibasic polyester fiber without deterioration of mechanical properties. In general, polyester fiber has excellent strength, dimensional stability, thermal stability, water fastness, washing fastness, etc., but it has poor dyeing, so it has to be dyed or carrier dyed under high pressure of 120-130 ℃. The high temperature pressure dyeing method requires an expensive dyeing device, and in the case of a blended product with wool, acrylic, and spandex, physical properties deteriorate during dyeing. Carrier dyeing is to increase the micellar spacing in the fiber by using a carrier preparation and to improve the diffusion of the dye to be able to dye under 100 ℃.

However, the carrier preparation is toxic and has a disadvantage in that tarring phenomenon and spots are easily generated when staining surfaces and attachments of dyestuffs. Many efforts and improvements have been made to improve the dyeability of polyester fibers. Many techniques have been reported, such as Japanese Patent Publication Nos. 34-10497 and 42-6199, for dibasic polyester copolymers copolymerized with monomers having sulfonate functional groups to allow direct dyeing on basic dyes. Efforts have also been made to develop copolymers that can broaden the amorphous region of polyester fibers through copolymerization with monomers such as diols and diacids to facilitate dyeing of disperse dyes. Japanese Patent Publication No. 34-10497, Many technologies have been published, including 35-11797, Small 38-15095, and Small 40-24933. The above techniques only consider the effect of modification by changing the composition of the polymer, and when copolymerizing the third component of the diol system, the mechanical properties of the yarn are greatly reduced. Therefore, the present invention eliminates the mechanical property deterioration factor of yarn by introducing minimal dye transferable units in polyester and manufactures dyeable polyester having excellent mechanical properties by dyeing under normal pressure by increasing dyeing effect by high-speed spinning technology. Its purpose is to.

The present invention is described in detail as follows.

[Methylene-3-3 (3.5-di-thi-butyl-4-hydroxyphenyl) propionate] methane with 2 to 6% by weight polyethylene glycol having a molecular weight of 600 to 1,000 and a heat stabilizer relative to 100% by weight of polyester (Product name: IRG-Ciba Gaigi product) Synthesis of copolyester by adding 0.3 ~ 0.5 weight, and then melt spinning the copolyester at a spinning speed of 4,000m / min ~ 6000m / min using a high-speed spinning machine It is a manufacturing method of the dibasic polyester fiber to manufacture.

In the present invention, when the content of polyethylene glycol is less than 2% by weight, the dyeability was not greatly improved even by high-speed spinning. When the content of the polyethylene glycol was more than 6% by weight, the strength of the yarn was lowered. In addition, when spinning at less than 4,000m / min spinning speed did not get more than 85% dyeing when dyed under normal pressure, and when spinning more than 6,000m / min showed a processing problem in the yarn manufacturing. In addition, when the content of the heat stabilizer was less than 0.3% by weight, thermal decomposition occurred during spinning, and the color of the yarn appeared to be yellow. In the present invention, the dyeing effect is increased by a high-speed spinning method with a minimum amount of dibasic diol component in the copolyester. When the dyeing rate was able to maintain more than 88%.

Example 1

After adding 2% by weight of polyethylene glycol and 0.3% by weight of IRG to 100% by weight of polyester, the copolymer was synthesized and spun at 265 ° C. at a spinning speed of 4,000 m / min. Table 1 shows the results of evaluating the dyeing properties and physical properties.

Example 2

Except for 4% by weight of polyethylene glycol was the same as in Example 1 and the results are shown in Table 1.

Example 3

Except for 6% by weight of polyethylene glycol was the same as in Example 1 and the results are shown in Table 1.

Example 4

Except that the spinning speed was set to 6,000 m / min is the same as in Example 1 and the results are shown in Table 1.

Example 5

Except that the spinning speed was set to 6,000 m / min is the same as in Example 2 and the results are shown in Table 1.

Example 6

Except that the spinning speed was set to 6,000 m / min is the same as in Example 3 and the results are shown in Table 1.

Comparative Example 1

Each copolymer synthesized to 100% by weight of polyethylene terephthalate to 2% by weight of polyethylene glycol was drawn in a melt spinning tester at a spinning speed of 1,000 m / min, followed by stretching at a stretching speed of 1,000 m / min and a drawing ratio of 3,254. Table 1 shows the results of evaluating dyeing properties and physical properties of the yarns.

Comparative Example 2

Except that 4% by weight of polyethylene glycol was the same as in Comparative Example 1 and the results are shown in Table 1.

Comparative Example 3

Except for 6% by weight of polyethylene glycol was the same as in Comparative Example 1 and the results are shown in Table 1.

[Comparative Example 4]

Except that 8% by weight of polyethylene glycol was the same as in Comparative Example 1 and the results are shown in Table 1.

[Comparative Example 5]

Except that the polyethylene glycol 10% by weight was the same as in Comparative Example 1 and the results are shown in Table 1.

* Final decision; Good when the strength of the yarn is 4.0 g / d or more and the dyeing rate is 90% or more, and when the strength is 3.5 g / d or more and less than 4.0 g / d and the dyeing rate is 85% or more and less than 90%, the strength is 3.5 If less than g / d or the dyeing rate is less than 85% was determined to be bad.

Claims (1)

Polyethylene glycol (molecular weight: 600-1,000) 2-6% by weight relative to polyester, [Methylene-3-3 (3,5-di-thi-butyl-4-hydroxyphenyl) propionate] as a heat stabilizer] A method for producing a di-chlorinated polyester fiber by high-speed spinning, characterized in that the copolyester synthesized by adding 0.3-0.5% by weight of methane is melt spun at a spinning speed of 4,000 m / min-6,000 m / min.