Ultra-bright polyester moderately-strong filament and preparing method thereof

A technology of polyester and bright light, which is applied in filament/thread forming, single-component polyester artificial filament, textiles and papermaking, and can solve problems such as refractory biodegradation and environmental pollution

Active Publication Date: 2019-05-07
JIANGSU HENGLI CHEM FIBER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the strong chemical inertness of polyester under natural conditions, it is difficult to b

Method used

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  • Ultra-bright polyester moderately-strong filament and preparing method thereof
  • Ultra-bright polyester moderately-strong filament and preparing method thereof
  • Ultra-bright polyester moderately-strong filament and preparing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] The preparation method of super bright polyester mid-strength yarn, the steps are as follows:

[0071] (1) prepare modified polyester;

[0072] (1.1) Esterification reaction;

[0073] Terephthalic acid, ethylene glycol, 2,2-difluoro-1,3-malonic acid, 3-trimethylsilyl-1,2-propanediol and 5-tert-butyl-1,3-benzenedicarboxylic acid Make a slurry, add antimony trioxide and triphenyl phosphate and mix evenly, pressurize in a nitrogen atmosphere to carry out esterification reaction, the pressurized pressure is 0.3MPa, the temperature of the esterification reaction is 250°C, when the esterification reaction The end point of the esterification reaction is when the amount of water distilled out reaches 90.1% of the theoretical value, and the molar ratio of terephthalic acid to ethylene glycol is 1:1.2, 2,2-difluoro-1,3-malonic acid , 3-trimethylsilyl-1,2-propanediol and 5-tert-butyl-1,3-benzenedicarboxylic acid add-on sum is 5mol% of terephthalic acid add-on amount, 2,2-difluor...

Embodiment 2

[0088] The preparation method of super bright polyester mid-strength yarn, the steps are as follows:

[0089] (1) prepare modified polyester;

[0090] (1.1) Preparation of 3-trimethylsilyl-3-methyl-1,2-propanediol;

[0091] (a) Mix 3-trimethylsilyl-3-methylpropene, peracetic acid and dichloromethane at a molar ratio of 1:5:10, and react at a temperature of 35°C for 5 hours, with stirring during the reaction. After the end, the solvent is removed, and trimethylsilylpropylene epoxide is obtained through purification and refining;

[0092] (b) Mix water, concentrated sulfuric acid and trimethylsilyl propylene epoxide, heat it in a water bath to 80°C under stirring conditions, keep it warm for 10 minutes, cool to room temperature after the reaction, and obtain the following formula after neutralization, distillation, separation and purification The dihydric alcohol of band trimethylsilyl side group shown in formula (I), R in formula (I) is-CH(CH 3 )-, concentrated sulfuric acid...

Embodiment 3

[0106] The preparation method of super bright polyester mid-strength yarn, the steps are as follows:

[0107] (1) prepare modified polyester;

[0108] (1.1) Preparation of 3-trimethylsilyl-3-methyl-1,2-propanediol;

[0109] (a) Mix 3-trimethylsilyl-3-methylpropene, peracetic acid and dichloromethane at a molar ratio of 1:10:15, and react at a temperature of 40°C for 8 hours with stirring during the reaction. After the end, the solvent is removed, and trimethylsilylpropylene epoxide is obtained through purification and refining;

[0110] (b) Mix water, concentrated sulfuric acid and trimethylsilyl propylene epoxide, heat it in a water bath to 85°C under stirring conditions, keep it warm for 15 minutes, cool to room temperature after the reaction, and obtain the following formula after neutralization, distillation, separation and purification: The dihydric alcohol of band trimethylsilyl side group shown in formula (I), R in formula (I) is-CH(CH 3 )-, concentrated sulfuric aci...

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Abstract

The invention relates to an ultra-bright polyester moderately-strong filament and a preparing method thereof. The ultra-bright polyester moderately-strong filament is prepared through metering of modified polyester melt, extruding of a spinneret plate, cooling, oiling, secondary stretching, primary heat setting and winding. A molecular chain of modified polyester comprises a terephthalic acid chain segment, an ethylene glycol chain segment, a fluorinated dibasic acid chain segment, a dibasic alcohol chain segment with a trimethyl silicon side group and a dibasic acid chain segment with a tertiary butyl side group. The ultra-bright polyester moderately-strong filament has the dye-uptake of 88.3-93.2% at the temperature of 125 DEG C and has the K/S value of 23.65-25.78, the fastness to soaping reaches the fifth grade, the dry friction fastness reaches the fifth grade, and the wet friction fastness is higher than the fourth grade; the intrinsic viscosity of the ultra-bright polyester moderately-strong filament is reduced by 15-20% after the filament is placed for 60 months at the temperature of 25 DEG C and the relative humidity of 65%. The method is simple in process, and the prepared polyester moderately-strong filament is good in degradability and dyeing performance.

Description

technical field [0001] The invention belongs to the technical field of modified polyester fibers, and relates to a super bright polyester medium-strength yarn and a preparation method thereof. Background technique [0002] Polyester is the trade name of polyester fiber in my country, and it is an important variety in synthetic fibers. It is a fiber-forming high polymer prepared from purified terephthalic acid (PAT) or dimethyl terephthalate (DMT) and ethylene glycol (EG) through esterification or transesterification and polycondensation reactions— Polyethylene terephthalate (PET), a fiber made by spinning and post-processing. With the expansion of polyester production scale, the production technology has also been greatly improved. From the initial production of conventional products, it gradually develops towards the production of high-tech, functional and differentiated fibers. The application fields of polyester fibers It has also gradually developed from the initial cl...

Claims

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Application Information

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IPC IPC(8): D01F6/92D01D5/253C08G63/695C08G63/682
Inventor 王山水王丽丽熊克
Owner JIANGSU HENGLI CHEM FIBER
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