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Method for producing functional polyester continuously, and dedicated equiment

A special equipment and functional technology, applied in the field of continuous production of functional polyester and special equipment, can solve the problems of unsuitable fiber and film products, poor dispersion of modifier components, high cost, etc., and achieve low production cost and variety. Stable and simple effect

Inactive Publication Date: 2007-05-09
TORAY FIBER RES INST(CHINA) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Sending the polyester in solid form to the blend production site requires the polyester to be cooled in the production unit and then optionally pelletized to achieve solidification. This commonly used traditional method brings the following disadvantages: cooling, solidification, pelletizing, Costly and cumbersome steps such as storage, transport and melting
[0004] On the other hand, the manufacturing method of directly adding modifier components to polyester melt has the defect of poor dispersion of modifier components, which is not suitable for fiber and film products

Method used

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  • Method for producing functional polyester continuously, and dedicated equiment
  • Method for producing functional polyester continuously, and dedicated equiment
  • Method for producing functional polyester continuously, and dedicated equiment

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Use terephthalic acid and ethylene glycol as raw materials to carry out esterification reaction at 200-260°C, and then carry out recondensation reaction at 280-300°C under a vacuum lower than 300Pa to continuously produce poly(p-phenylene) with a viscosity of 0.655 Ethylene glycol diformate (abbreviated as: PET) melt. The polyethylene terephthalate melt in the continuous polymerization equipment 1 is input through the main pipeline 2 at a speed of 1000kg / h at a temperature of 220-300°C (for example, 220°C, 240°C, 280°C, 300°C). Co-mixing device 3, while branch pipe 4 inputs polyethylene terephthalate into screw mixer 5, and the supply rate is 2.5kg / h; SH-D2 antistatic powder (produced by Nantong Shuanghua Chemical New Material Co., Ltd. ) into the screw mixer 5, the supply rate is 2.5kg / h. The blending temperature in the blending device 3 was 290°C. The content of SH-D2 antistatic powder in the prepared functional polyethylene terephthalate is 0.5%. Then use ordinary...

Embodiment 7

[0023] Use terephthalic acid and ethylene glycol as raw materials to carry out esterification reaction at 200-260°C, and then carry out recondensation reaction at 280-320°C under a vacuum lower than 300Pa to continuously produce polyparaphenylene with a viscosity of 0.655. Ethylene glycol diformate (abbreviated as: PET) melt. Polyethylene terephthalate melt passes through the main pipeline from the continuous polymerization equipment 6 at a speed of 1000kg / h at a temperature of 220-320°C (for example, 220°C, 240°C, 280°C, 300°C, 320°C). 7 is fed into the blending device 8. On the other hand, polyethylene terephthalate with a viscosity of 0.655 is mixed with SH-D2 antistatic powder in the screw mixer 9, wherein the weight part of SH-D2 antistatic powder relative to the mixture is 50 %, the mixture was supplied to the blending device 8 at 190.5 kg / h. Then use ordinary spinning machine to carry out conventional spinning and drawing process to make antistatic fiber. The volume ...

Embodiment 8

[0025] The same polyethylene terephthalate as in Embodiment 7 was supplied into the blending device 8 from the continuous polymerization device 6 through the main pipeline 7, and the supply rate was 1000 kg / h. On the other hand, polyethylene terephthalate with a viscosity of 0.655 was mixed with isophthalic acid alkane-5-sulfonate and ethylene terephthalate copolymer in a screw mixer 9 screws, Wherein the molar content of the modified copolymer isophthalic acid alkane-5-sulfonate relative to the total amount of the dibasic acid is 40%, the weight portion of the modified polyester relative to the mixture is 50%, and the mixture is 430kg / h It is supplied to the blending device 8, and then the ordinary spinning machine is used to perform conventional spinning and drawing processes to make fibers. The obtained silk strips are subjected to conventional simple dyeing, and the dyeing property is relatively uniform. It shows that the copolymer can be uniformly dispersed in the blend....

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Abstract

This invention discloses a method for continuously producing functional polyester. The method comprises: introducing molten polyester (produced by graft-polymerization) into a blending device through a main pipeline (connected with the continuous polymerization device), adding modifier and polyester into a mixer, mixing, introducing into the blending device, and mixing with molten polyester to obtain modified functional polyester. The method is simple and easy to operate. The modification agent is uniform and stable. The produced polyester has good quality.

Description

Technical field: [0001] The invention relates to a polyester production method and equipment. Background technique: [0002] It is known that especially polyethylene terephthalate, polyethylene terephthalate and polybutylene terephthalate, due to their excellent mechanical, physical and chemical properties, are widely used in fibers, films And other molded products are widely used. There are two methods for polyester production: one is kettle polymerization and the other is continuous polymerization. Kettle polymerization can produce many kinds of polyester products, but the cost is relatively high and the quality of the polymer is not stable. In order to reduce production costs and stabilize polymer quality, more and more manufacturers adopt continuous polymerization manufacturing methods. However, the polyester variety obtained by the continuous polymerization method is relatively single, which greatly limits the development of the variety of polyester varieties. [00...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08G63/91C08G63/80B29B7/40
Inventor 曹晓秀本田圭介
Owner TORAY FIBER RES INST(CHINA) CO LTD
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