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A kind of colored low melting point polyester fiber and its preparation method

A low-melting polyester, non-ferrous technology, applied in fiber processing, fiber chemical characteristics, stretch spinning, etc., can solve the problems of slow melting speed and high melting point, achieve fast melting speed, low melting point temperature, reduce softening and melting point. Effect of Flow Temperature

Active Publication Date: 2019-08-09
富威尔(珠海)复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to overcome the problems of high melting point and slow melting speed of the colored low-melting polyester fiber in the prior art, realize large-scale production, and provide a colored low-melting polyester fiber and its preparation method

Method used

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  • A kind of colored low melting point polyester fiber and its preparation method
  • A kind of colored low melting point polyester fiber and its preparation method
  • A kind of colored low melting point polyester fiber and its preparation method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] A kind of preparation method of colored low melting point polyester fiber:

[0046] a) low melting point polyester polymerization;

[0047] (1) Esterification reaction;

[0048] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, benzoic acid and 2-pentyl-1,12 dodecanediol into slurry, carry out esterification reaction, under nitrogen atmosphere Pressurized reaction, the pressurized pressure is normal pressure, the temperature is 230 ° C, when the distilled amount of water in the esterification reaction reaches more than 90% of the theoretical value, it is the end point of the esterification reaction, and the esterification product is obtained; wherein, p-benzene The molar ratio of dicarboxylic acid, isophthalic acid, diethylene glycol, branched dodecyl glycol to ethylene glycol is 1:0.4:0.1:0.05:1.8; the amount of benzoic acid added is the number of moles of phthalic acid 0.01%.

[0049] (2) polycondensation reaction;

[0050] T...

Embodiment 2

[0060] A kind of preparation method of colored low melting point polyester fiber:

[0061] a) low melting point polyester polymerization;

[0062] (1) Esterification reaction;

[0063] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, p-toluic acid and 2-hexyl-1,12 dodecanediol into a slurry, carry out esterification reaction, in nitrogen Pressurized reaction under the atmosphere, the pressurized pressure is 0.3MPa, the temperature is 250 ° C, when the distilled amount of water in the esterification reaction reaches more than 90% of the theoretical value, it is the end point of the esterification reaction, and the esterification product is obtained; wherein, The molar ratio of terephthalic acid, isophthalic acid, diethylene glycol, 2-hexyl-1,12 dodecanediol, and ethylene glycol is 1:0.6:0.3:0.1:2.5; p-toluic acid The addition amount is 0.5% of the moles of phthalic acid.

[0064] (2) polycondensation reaction;

[0065] Then, under the...

Embodiment 3

[0075] A kind of preparation method of colored low melting point polyester fiber:

[0076] a) low melting point polyester polymerization;

[0077] (1) Esterification reaction;

[0078] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol, p-ethylbenzoic acid and 2-heptyl-12 dodecanediol into a slurry, carry out esterification reaction, in a nitrogen atmosphere Under pressurized reaction, the pressurized pressure is 0.1MPa, and the temperature is 240°C. When the distilled amount of water in the esterification reaction reaches more than 90% of the theoretical value, it is the end point of the esterification reaction, and the esterification product is obtained; wherein, for The molar ratio of phthalic acid, isophthalic acid, diethylene glycol, 2-heptyl-12 dodecanediol, and ethylene glycol is 1:0.5:0.2:0.07:2; the amount of p-ethylbenzoic acid added 0.1% of the moles of phthalic acid.

[0079] (2) polycondensation reaction;

[0080] Then, under...

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Abstract

The invention relates to colored low-melting-point polyester (PET) fiber and a preparation method thereof. The colored low-melting-point polyester fiber is of a skin-core structure, a skin layer is of low-melting-point polyester, and a core layer is of colored PET; the low-melting-point polyester is formed by a terephthalic acid chain segment, an isophthalic acid chain segment, a glycol chain segment, a diglycol chain segment, molecular weight modifier capping group and a branched-chain contained twelve carbon-dialcohol segments; a molecular weight modifier corresponding to the molecular weight modifier capping group specifically refers to benzoic acid, p-toluylic acid or ethylbenzoic acid, or methyl ester or ethyl ester corresponding to benzoic acid, p-toluylic acid or ethylbenzoic acid, or saturated fatty acid or methyl ester or ethyl ester corresponding to saturated fatty acid; the saturated fatty acid refers to the fatty acid 9-30 in carbon number; the preparation method includes the steps of low-melting-point polyester polymerization and skin-core composite spinning, drawing process is adopted in back spinning, and the low-melting-point polyester fiber is obtained via crimping, cutting and drying. The low-melting-point polyester fiber prepared is low in melting point and good in fresh image.

Description

technical field [0001] The invention belongs to the technical field of colored low-melting polyester fibers, and relates to a colored low-melting polyester fiber and a preparation method thereof. Background technique [0002] At present, the non-woven fabric industry is developing rapidly, especially the polyester non-woven fabric industry needs a polymer with a melting point lower than ordinary polyester, but has good compatibility with ordinary polyester as a thermal bonding fiber. Modification of ordinary polyester to prepare low melting point polyester. [0003] Low-melting point copolyester is a polyester with a lower melting point obtained by chemically modifying ordinary polyester. Because its structure is similar to that of ordinary polyester, it retains some of the characteristics of ordinary polyester. Ordinary polyester has good compatibility. This modified copolyester not only has low melting point, good fluidity, but also moderate price, so it is widely used. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14D01F1/10D01F1/02C08G63/672D01D5/34D01D5/12D02G1/00
CPCC08G63/672D01D5/12D01D5/34D01F1/02D01F1/10D01F8/14D02G1/00
Inventor 朱兴荣余小平张盛
Owner 富威尔(珠海)复合材料有限公司
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