Flame-retarding low-melting-point polyester fiber and preparation method thereof

A low-melting point polyester and flame-retardant polyester technology, which is applied in fiber processing, conjugated synthetic polymer artificial filament, filament/thread forming, etc., can solve problems such as slow melting speed, high melting point, and single variety , to achieve the effect of fast melting speed, lower melting point and low melting point temperature

Active Publication Date: 2017-06-09
扬州富威尔复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The market demand for low-melting point polyester is huge. Compared with foreign countries, the development of domestic low-melting point fibers started relatively late, and the variety is relatively single. There is still a certain gap between the raw materials, technology and equipment and international leading products. At present, the domestic Most of the products are still in the development stage, and they still face many difficulties on the road to industrialization
On the one hand, the existing low-melting point polyester has a higher melting point, on the other hand, its melting speed is slow, which greatly affects the use of low-melting point polyester

Method used

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  • Flame-retarding low-melting-point polyester fiber and preparation method thereof
  • Flame-retarding low-melting-point polyester fiber and preparation method thereof
  • Flame-retarding low-melting-point polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] A preparation method of flame-retardant low-melting polyester fiber:

[0048] The preparation steps of low melting point polyester:

[0049] (1) Esterification reaction;

[0050] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol and 2-pentyl-1,12 dodecanediol into a slurry, carry out esterification reaction, pressurized reaction under nitrogen atmosphere, The pressurized pressure is normal pressure and 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; among them, terephthalic acid, m- The molar ratio of phthalic acid, diethylene glycol, 2-pentyl-1,12 dodecanediol and ethylene glycol is 1:0.4:0.1:0.05:1.8;

[0051] (2) polycondensation reaction;

[0052] Then, under the action of catalyst and stabilizer, the polycondensation reaction in the low vac...

Embodiment 2

[0067] A preparation method of flame-retardant low-melting polyester fiber:

[0068] Low melting point polyester polymerization steps:

[0069] (1) Esterification reaction;

[0070] After preparing terephthalic acid, isophthalic acid, ethylene glycol, diethylene glycol and 2-hexyl-1,12 dodecanediol into slurry, carry out esterification reaction, pressurize reaction under nitrogen atmosphere, add The pressure is 0.3 MPa, 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; among them, terephthalic acid, m-benzene The molar ratio of dicarboxylic acid, diethylene glycol, 2-hexyl-1,12 dodecanediol and ethylene glycol is 1:0.6:0.3:0.1:2.5;

[0071] (2) polycondensation reaction;

[0072] Then, under the action of catalyst and stabilizer, the polycondensation reaction in the low vacuum stage starts...

Embodiment 3

[0087]A preparation method of flame-retardant low-melting polyester fiber:

[0088] Low melting point polyester polymerization steps:

[0089] (1) Esterification reaction;

[0090] 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.

[0091] (2) polycondensation reaction;

[0092] Then, under t...

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Abstract

The invention discloses a flame-retarding low-melting-point polyester fiber and preparation method thereof, wherein the flame-retarding low-melting-point polyester fiber is a belt core structure, wherein the belt layer is low-melting-point polyester, and the core layer is flame-retarding polyester; the low-melting-point polyester is formed by terephthalic acid chain section, isophthalic acid chain section, glycol chain section, diglycol chain section and branch-chain-contained dodecynoic glycol chain section; the flame-retarding polyester consists of terephthalic acid chain section, glycol chain section, and flame retardant 2- ethoxy phenyl hypophosphorous acid chain section. The preparation method includes low-melting-point polyether polymerization and belt core composite spinning; the post spinning adopts drafting technique; the flame-retarding low-melting-point polyester fiber is acquired through rolling, cutting and drying. The flame-retarding low-melting-point polyester fiber is low in melting point and good in flame retarding effect.

Description

technical field [0001] The invention belongs to the field of flame-retardant low-melting-point polyester fibers, and relates to a flame-retardant low-melting-point 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 i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14C08G63/672C08G63/692D01D5/34
CPCC08G63/672C08G63/6926D01D5/34D01F8/14
Inventor 詹勇朱兴荣余小平
Owner 扬州富威尔复合材料有限公司
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