Filament low-melting-point polyester fiber and preparation method thereof

A low-melting point polyester and filament technology, applied in fiber processing, rayon manufacturing, fiber chemical characteristics, etc., can solve the problem of large market demand for low-melting point polyester, late start of low-melting point fiber development, and impact on low-melting point polyester Use and other problems to achieve the effect of easy melting speed, widening molecular weight distribution, and good coating adhesion effect

Active Publication Date: 2017-05-31
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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  • Filament low-melting-point polyester fiber and preparation method thereof
  • Filament low-melting-point polyester fiber and preparation method thereof
  • Filament low-melting-point polyester fiber and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0050] A preparation method of filament low melting point polyester fiber:

[0051] a) low melting point polyester polymerization;

[0052] (1) Esterification reaction;

[0053] 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, and 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%.

[0054] (2) polycondensation reaction;

[0055] Then, ...

Embodiment 2

[0068] A preparation method of filament low melting point polyester fiber:

[0069] a) low melting point polyester polymerization;

[0070] (1) Esterification reaction;

[0071] 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.

[0072] (2) polycondensation reaction;

[0073] Then, under the action...

Embodiment 3

[0086] A preparation method of filament low melting point polyester fiber:

[0087] a) low melting point polyester polymerization;

[0088] (1) Esterification reaction;

[0089] 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.

[0090] (2) polycondensation reaction;

[0091] Then, under the ...

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Abstract

The invention relates to a filament low-melting-point polyester fiber and a preparation method thereof. The filament low-melting-point polyester fiber is in a skin-core structure, a skin layer is made of low-melting-point polyester; a core layer is made of PET (polyethylene terephthalate); the low-melting-point polyester consists of a terephthalic acid chain segment, an isophthalic acid chain segment, an ethylene glycol chain segment, a diethylene glycol chain segment, a molecular weight modifier chain segment and a 1, 12-Dodecanediol chain segment containing branched chains; a molecular weight modifier corresponding to the molecular weight modifier chain segment is specifically a monoacid series or a diacid series; the preparation method of the filament low-melting-point polyester fiber comprises the following steps: polymerization of the low-melting-point polyester and skin-core composite spinning, so as to obtain the filament low-melting-point polyester fiber. The prepared filament low-melting-point polyester fiber has the advantages that the initial melting point is reduced, the melting speed is increased, the polyester fiber is immediately melted at the corresponding temperature, and the melting effect is good.

Description

technical field [0001] The invention belongs to the field of filament low-melting polyester fiber and relates to a filament 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. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F8/14D01F1/10C08G63/672C08G63/78C08G63/86D01D5/34
CPCC08G63/672C08G63/78C08G63/866D01D5/34D01F1/10D01F8/14
Inventor 朱兴荣高国张盛
Owner 扬州富威尔复合材料有限公司
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