A kind of ultra-short low melting point polyester fiber and preparation method thereof

A low-melting polyester and fiber technology, applied in fiber processing, fiber type, conjugated synthetic polymer rayon, etc., can solve the problems of slow melting speed, high melting point, single variety, etc., to broaden the molecular weight distribution, Fast melting speed and improved low melting point effect

Active Publication Date: 2019-08-27
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 very large. 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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  • A kind of ultra-short low melting point polyester fiber and preparation method thereof
  • A kind of ultra-short low melting point polyester fiber and preparation method thereof
  • A kind of ultra-short low melting point polyester fiber and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] A preparation method of ultra-short low-melting polyester fiber:

[0047] a) low melting point polyester polymerization;

[0048] (1) Esterification reaction;

[0049] 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, 2-pentyl-1,12 dodecanediol, and ethylene glycol is 1:0.4:0.1:0.05:1.8; the amount of benzoic acid added is benzene 0.01% of the moles of dicarboxylic acid.

[0050] (2) polycondensation reaction;

[0051] T...

Embodiment 2

[0060] A preparation method of ultra-short low-melting 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 action of...

Embodiment 3

[0074] A preparation method of ultra-short low-melting polyester fiber:

[0075] a) low melting point polyester polymerization;

[0076] (1) Esterification reaction;

[0077] 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.

[0078] (2) polycondensation reaction;

[0079] Then, under the act...

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Abstract

The invention relates to an ultra-short polyester fiber with a low melting point and a method for preparing the ultra-short polyester fiber. The ultra-short polyester fiber with the low melting point is of a skin-core structure. Skin layers are made of polyester with a low melting point, and core layers are made of PET (polyethylene terephthalate); the polyester with the low melting point comprises terephthalic acid chain segments, isophthalic acid chain segments, ethylene glycol chain segments, diethylene glycol chain segments, molecular weight regulator chain segments and dodeca-carbon diol chain segments with branch chains; molecular weight regulators corresponding to the molecular weight regulator chain segments are particularly monoacid series or binary acid series. The method includes steps of polymerizing the polyester with the low melting point and carrying out skin-core composite spinning; carrying out back-spinning by the aid of drafting processes; carrying out oiling, cutting-off and drying to obtain the ultra-short polyester fiber with the low melting point. The ultra-short polyester fiber with the low melting point and the method have the advantages that the initial melting point of the ultra-short polyester fiber prepared by the aid of the method is reduced to a certain extent, the melting speed of the ultra-short polyester fiber is increased, the ultra-short polyester fiber can be immediately molten at the corresponding temperatures, and good melting effects can be realized.

Description

technical field [0001] The invention belongs to the field of ultra-short low-melting-point polyester fiber technology, and relates to an ultra-short 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, s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): D01F8/14C08G63/672C08G63/86D06M15/285D06M15/333D06M13/256D01D5/34D06M101/32
Inventor 詹勇余小平朱兴荣
Owner 扬州富威尔复合材料有限公司
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