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Modified copolyester slicer or fabric and method for making same

A copolyester and slicing technology, which is applied in the direction of single-component polyester rayon, can solve the problems of difficult polymerization reaction, low molecular weight, and decreased thermal stability of copolyester, and achieve low cost and super softness Feel, high shrinkage effect

Inactive Publication Date: 2007-10-31
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the introduction of ether bonds into the copolyester macromolecular chain, the thermal stability of the copolyester is reduced, resulting in a narrow range of spinning temperature and poor spinnability.
Since the 1990s, the United States, Japan and other developed countries have developed a batch of brand-new characteristic products HCDP by increasing the SIP content. This kind of fiber has better dyeing rate and color fastness, and with the increase of SIP content , its hygroscopicity and antistatic properties are greatly increased, but due to the increase in the content of SIP in the polymerization stage, the interaction of ionic groups is enhanced, resulting in a sharp increase in melt viscosity, making it difficult to carry out the polymerization reaction. It is necessary to increase the molecular weight of the polymer. It is very difficult to obtain, so the molecular weight of HCDP is generally low, and the high viscosity during melting also causes difficulty in product processing and decline in mechanical properties, which have become important factors that limit the further application of this type of modified copolyester

Method used

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  • Modified copolyester slicer or fabric and method for making same
  • Modified copolyester slicer or fabric and method for making same
  • Modified copolyester slicer or fabric and method for making same

Examples

Experimental program
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Effect test

Embodiment 1

[0037] Using batch polymerization equipment, after mixing 2.117mol PTA, 3.403mol EG and 0.142mol MPD equivalent to 4mol% molar weight of EG and MPD mixed alcohol, they were added to the reaction system, and 0.01wt% antimony acetate catalyst and 0.02 Wt% triphenyl phosphate (relative to PTA), stirring at a temperature of 230~240°C and a pressure of 0.0~0.5Mpa for 1.5h, when the esterification reaction is completed, add SIPE equivalent to 3mol% of PTA to enter the polycondensation process stage, control the reaction temperature at 240~280°C, gradually reduce the pressure to vacuum degree <130pa, polycondensate for 2 hours, and finally obtain MCDP copolyester chips containing 4mol% of MPD units and 3mol% of SIPE units. The copolyester has an intrinsic viscosity of 0.512 and a melting point of 235°C.

Embodiment 2

[0039] Adopt batch-type polymerization equipment, add PTA 150kg, EG 70.6kg, and the MPD that is equivalent to EG and MPD mixed alcohol 10mol% molar weight, add the triphenyl phosphate of catalyst 0.01wt% antimony acetate catalyst and 0.02wt% (relative to PTA ), stirring for 3 hours at a temperature of 230~240°C and a pressure of 0.0~0.5Mpa. When the esterification reaction is over, add SIPE equivalent to 3mol% of PTA, control the reaction temperature at 240~280°C, and gradually reduce the pressure to vacuum <130pa, polycondensation for 4 hours, and MCDP copolyester chips containing 10 mol% of MPD units and 3 mol% of SIPE units were obtained. The copolyester has an intrinsic viscosity of 0.486 and a melting point of 214°C.

Embodiment 3

[0041] Adopt batch-type polymerization equipment, add PTA 150kg, EG 66.7kg, and the MPD that is equivalent to EG and MPD mixed alcohol 15mol% molar weight, add the triphenyl phosphate of catalyst 0.01wt% antimony acetate catalyst and 0.02wt% (relative to PTA ), stirring for 4 hours at a temperature of 230~240°C and a pressure of 0.0~0.5Mpa. When the esterification reaction is over, add 3mol% SIPE equivalent to PTA under a system of 0.1~0.01Mpa, and control the reaction temperature at 240~280°C , gradually decompressed to a vacuum degree <130pa, polycondensed for 4 hours, and prepared MCDP copolyester chips containing 15 mol% of MPD units and 3 mol% of SIPE units. The copolyester has an intrinsic viscosity of 0.476 and a melting point of 209°C.

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Abstract

The invention relates to a modified copolyester slice or fiber and a relative preparation, wherein the slice is copolymerized from terephthalic acid, ethandiol, isophthalate esters of sulfonic acid sodium (or potassium), and fatty group dibasic alcohol (or relative alkylate) with side chain. And the preparation comprises that (1), mixing the ethandiol and the fatty group dibasic alcohol (or relative alkylate) into a mixed alcohol, adding catalyzer and stabilizer to esterify the terephthalic acid under 220-260Deg. C, (2), adding 1-9%mol isophthalate esters of sulfonic acid sodium (or potassium) relative to the terephthalic acid for polycondensation at 250-300Deg. C, (3), drying, fusing, spinning, and drawing to obtain the modified copolyester filament. The inventive product can dye anion paint and disperse paint into deep color at normal pressure, with better feeling, high contraction, hidden micro coiled property, simple preparation, low cost and batch production support.

Description

technical field [0001] The present invention relates to a kind of polyester fiber (polyester fiber) and its preparation, specifically a kind of side chain-containing aliphatic dihydric alcohol (or its alkoxide) modified copolyester chip or fiber and its preparation method. Background technique [0002] Polyester fiber has outstanding properties, such as high modulus, high strength, resilience, light resistance, abrasion resistance, heat resistance, good chemical resistance and low cost, and can be used in many fields such as clothing, decoration and industry . However, the excellent physical and mechanical properties of polyester fibers depend on their regular molecular structure and high crystallinity, but this also brings difficulties in dyeing polyester fibers. Disperse dyes can only be used under high temperature and high pressure Dyeing, and the color fastness is low, the color is light, its equipment and technical requirements are high, and it pollutes the environmen...

Claims

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Application Information

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IPC IPC(8): D01F6/62C08G63/183
Inventor 顾利霞陈斌仲蕾兰程健肖茹
Owner DONGHUA UNIV
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