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Process of preparing PDT copolyester fiber

A technology of copolyester and fiber, applied in the field of preparation of PDT copolyester fiber, achieves the effect of reducing energy consumption, promoting sustainable development, and excellent spinning performance and dyeing performance

Inactive Publication Date: 2007-10-03
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the preparation methods of fibers such as existing copolyester PET, PTT, and PBT, the dibasic alcohol used for reacting with terephthalic acid all comes from petroleum industry, and the kind of dibasic alcohol used for preparing every kind of copolyester fiber No more than three kinds, that is, multi-component glycol products (called corn-based glycol products) that have not been made from corn raw materials and have ethylene glycol as the main component to prepare copolyester fibers

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] In the CEG-9306 corn-based ethylene glycol product, the content of ethylene glycol is 93%, the content of 1,2-propanediol is 6.6%, and the rest is water. The main polymerization process of CEG-9306 corn-based ethylene glycol and PTA is as follows: additives: Sb2O3, 340pp; TiO2, 0.3%; SiO2 with a particle size of 20 nanometers, 0.1%; polycondensation temperature: 282 ° C; polymerization time: 6 hours 25 The main indicators of PDT-9306 products obtained by copolymerization are: intrinsic viscosity: 0.625dl / g; glass transition temperature: 66°C; melting point: 240°C; carboxyl content: 28.42%; Conventional POY high-speed spinning machine spinning. Specifications: 75D / 36f; 3100 m / min spinning speed; the temperature of the spinning box is 280°C, which is about 10 degrees lower than that of the pure PET chip spinning box (290°C). The obtained POY yarn is processed by a conventional DTY texturing machine to obtain the final fiber indicators: breaking strength: 3.86CN / dtex; bre...

Embodiment 2

[0021] In the CEG-97001 corn-based ethylene glycol product, the ethylene glycol content is 97.6%, the 1,2-propanediol content is 0.26%, the 1,2-butanediol content is 0.45%, and the water content is 0.43%; CEG-97001 The main polymerization process of corn-based ethylene glycol and PTA is as follows: additives: Sb2O3, 300pp; TiO2, 0.3%; SiO2 with a particle size of 20 nanometers, 0.1%; polycondensation temperature: 283°C; polymerization time: 5 hours and 17 minutes; The main indicators of the polymerized chip PDT-97001 product are: intrinsic viscosity 0.670dl / g; glass transition temperature 69°C; melting point: 255°C; carboxyl content 25.44%; , the speed of the high-speed spinning machine in the normal POY process can reach 3500 m / min; the temperature of the spinning box is 290 ° C, and the resulting POY yarn is processed by a conventional DTY texturing machine. The index of the final fiber obtained is: breaking strength : 3.54CN / dtex; elongation at break: 24.12%. The dyeing pe...

Embodiment 3

[0023] In the CEG-97002 corn-based ethylene glycol product, the content of ethylene glycol is 97.5%, the content of 1,2-propanediol is 0.37%, the content of 2,3-butanediol is 0.13%, and the content of 1,2-pentanediol The content is 1.53%. The main polymerization process of CEG-97002 corn-based ethylene glycol and PTA is: additive: Sb2O3, 300pp; TiO2, 0.3%; SiO2 with a particle size of 20 nanometers, 0.15%; polycondensation temperature: 287 ℃ polymerization time; 6 hours; total The main indicators of the polymerized chip PDT-97002 product are: intrinsic viscosity: 0.729dl / g; glass transition temperature: 62°C; melting point: 236°C; carboxyl content: 24.06%; For fiber specifications, the speed of the high-speed spinning machine in the normal POY process is 3100 m / min; the temperature of the spinning box is 275 ° C, and the resulting POY yarn is processed by a conventional DTY texturing machine. The index of the final fiber is: fracture Strength: 3.62CN / dtex; elongation at break...

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Abstract

The process of preparing PDT copolyester fiber includes the following steps: 1. saccharifying and catalytically hydrogenating corn starch to prepare sorbitol, catalytically hydrogenating to prepare multicomponent mixed alcohol, and fractionating in a fractionating tower at 182-212 deg.c to obtain corn-base ethylene glycol product of 89-99 % content and with ethylene glycol as main component and other diols; 2. detecting the contents of component diols in the ethylene glycol product and adding insufficient components for content fluctuation controlled within 10-30 %; and 3. adding nanometer titania in 0.05-1 wt% into the corn-base ethylene glycol product, and copolymerizing together with terephthalic acid at 280-288 deg.c for 5-7 hr to prepare PDT copolyester. The process is suitable for industrial production.

Description

technical field [0001] The invention belongs to the field of chemical fiber preparation, in particular to a preparation method of PDT copolyester fiber. Background technique [0002] In the preparation methods of fibers such as existing copolyester PET, PTT, and PBT, the dibasic alcohol used for reacting with terephthalic acid all comes from petroleum industry, and the kind of dibasic alcohol used for preparing every kind of copolyester fiber No more than three kinds, that is to say, there is no multi-component diol product (called corn-based ethylene glycol product) made from corn raw material with ethylene glycol as the main component to prepare copolyester fiber. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a preparation method of copolyester fiber, which realizes the industrialized production of corn-based ethylene glycol route. [0004] A kind of preparation method of PDT copolyester fiber of the present...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/84C08G63/78
Inventor 徐周文吴嘉麟陈建文
Owner DONGHUA UNIV
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