Copolyester and polyester fibers containing it

A technology of co-polyester and co-polymerization, which is applied in the field of polyester fiber, can solve the problems of reduced light resistance, reduced strength over time, and stick-slip, etc., and achieves the effect of high hygroscopicity and high hygroscopic properties

Active Publication Date: 2016-12-28
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this proposal has problems such as a decrease in light resistance, stick-slip due to the adhesion of moisture-absorbing components to the composition or fiber surface, and a decrease in strength over time, so it has not yet been put into practical use.
However, in the case of fiberizing with a cross-sectional shape having a hollow portion as in this proposal, when the fiber is subjected to twisting or false twisting, the hollow portion is broken in the process, as in the above case. Problems with sheath breakage due to swelling of the absorbent polymer due to subsequent hot water treatment

Method used

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  • Copolyester and polyester fibers containing it
  • Copolyester and polyester fibers containing it
  • Copolyester and polyester fibers containing it

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] In the transesterification reaction device of the reaction device that the transesterification reaction device and the polycondensation reaction device are provided with the transfer pipe of 400 mesh filters, add the dimethyl terephthalate of 429g and the ethylene glycol of 274g, 0.1 g of manganese acetate as a transesterification catalyst was transesterified while distilling off methanol at a temperature of 140 to 240° C., and then 0.15 g of trimethyl phosphate was added thereto to synthesize BHT. Then, when the BHT is transferred from the transesterification reaction device to the polycondensation reaction device through the transfer pipe, 75 g of polyethylene glycol with a molecular weight of 8300 (PEG6000 manufactured by Sanyo Chemical Industry Co., Ltd.) heated to a temperature of 70° C. is injected through the In the transfer tube before the filter, start agitation at the same time as the transfer is completed. Next, add 0.1 g of Irganox 1010 (manufactured by BASF...

Embodiment 2～4、 comparative example 1～2

[0093] Except having changed the copolymerization ratio of PEG into the value shown in Table 1, it implemented similarly to Example 1. The results are shown in Table 1.

[0094]

[0095] Like Examples 2-4, when the copolymerization ratio of PEG is in the range of this invention, the polyester fiber with high hygroscopicity can be obtained. However, as in Comparative Examples 1 and 2, when the copolymerization ratio of PEG was out of the range of the present invention, the hygroscopicity was low, or filament breakage often occurred during spinning or drawing, and desired polyester fibers could not be obtained.

Embodiment 5～6、 comparative example 3～4

[0097] Except having changed the molecular weight of PEG into the value shown in Table 2, it carried out similarly to Example 1. The results are shown in Table 2.

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Abstract

The present invention provides: a copolymerized polyester which has high moisture absorption characteristics, while maintaining excellent characteristics of a polyester; and a polyester fiber which is formed from this copolymerized polyester and has excellent moisture absorption. A copolymerized polyester of the present invention is a copolymerized polyester which is obtained by copolymerizing 10-25% by weight of a polyethylene glycol having a number average molecular weight of 8,000-20,000 and comprises ethylene terephthalate as a main repeating unit, and which is characterized by having an amorphous structure that is mainly formed of a polyethylene glycol, while having a polyethylene terephthalate coexistent with the polyethylene glycol.

Description

technical field [0001] The present invention relates to a hygroscopic copolyester and polyester fiber containing it. More specifically, the present invention relates to a copolyester excellent in hygroscopicity which can be spun alone and a polyester fiber containing it excellent in hygroscopicity. Background technique [0002] Currently, polyesters represented by polyethylene terephthalate are widely used in applications such as fibers, films, and moldings because they are excellent in strength, thermal stability, and chemical resistance. However, since polyethylene terephthalate is hydrophobic in nature, it lacks hygroscopicity, and when used as clothing, it will cause a "stuffy feeling" when the humidity is high, or static electricity when the humidity is low in winter , is not an ideal material in terms of wearing comfort. In addition, when polyethylene terephthalate is used as a resin or a film, there is also a problem of being charged due to low hygroscopicity. [0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08G63/183C08G63/672D01F6/86
CPCC08G63/672D01F6/86
Inventor 堤贤一鹿野秀和荒西义高
Owner TORAY IND INC
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