Preparation method of super cotton-like polyester fiber by continuous polymerizing melt direct spinning

A cotton polyester fiber, melt direct spinning technology, applied in the direction of melt spinning, stretch spinning, fiber processing, etc., can solve the problems affecting the performance stability of polyester fibers, uneven dispersion of additives, uneven mixing, etc. , to achieve the effect of improving spinnability, improving product stability and reducing blending

Active Publication Date: 2017-09-26
SANFANGXIANG GROUP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This patent adds a large amount of additives in the process of masterbatch manufacturing, which will cause uneven dispersion of additives and a large number of side reactions. Before spinning, it must be mixed with ordinary chips, which is more prone to uneven mixing and affects polyester fibers. performance stability

Method used

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  • Preparation method of super cotton-like polyester fiber by continuous polymerizing melt direct spinning
  • Preparation method of super cotton-like polyester fiber by continuous polymerizing melt direct spinning
  • Preparation method of super cotton-like polyester fiber by continuous polymerizing melt direct spinning

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Effect test

Embodiment 1

[0043] This embodiment provides a preparation method for continuous polymerization melt direct spinning super-cotton-like polyester fiber, which firstly produces a super-cotton-like polyester melt in a polyester synthesis device, and then directly imports it into spinning equipment to make a super-cotton-like polyester fiber The polyester fiber, the preparation method specifically comprises the following steps carried out continuously and successively:

[0044] (1) The first esterification reaction process: continuously add terephthalic acid and ethylene glycol in a molar ratio of 1:1 into the first esterification reaction kettle, and control the flow rate of terephthalic acid to 1700kg / h, Perform esterification reaction at 240°C to generate ethylene terephthalate;

[0045] (2) The second esterification reaction process: continuously feed the feed liquid in the first esterification reactor into the second esterification reactor, and feed ethylene glycol into the second esterif...

Embodiment 2

[0051] This embodiment provides a kind of preparation method of continuous polymerization melt direct spinning super cotton imitation polyester fiber, and preparation method specifically comprises the following steps that are carried out continuously successively:

[0052] (1) The first esterification reaction process: continuously add terephthalic acid and ethylene glycol in a molar ratio of 1:2 into the first esterification reaction kettle, and control the flow rate of terephthalic acid to 1700kg / h, Carry out esterification reaction at 230°C to generate ethylene terephthalate;

[0053] (2) The second esterification reaction process: continuously feed the feed liquid in the first esterification reactor into the second esterification reactor, and feed ethylene glycol into the second esterification reactor at a flow rate of 50kg / h , lower the temperature of the system to 200°C, and under the protection of nitrogen, accurately add the hygroscopic mother liquor to the second este...

Embodiment 3

[0059] This embodiment provides a kind of preparation method of continuous polymerization melt direct spinning super cotton imitation polyester fiber, and preparation method specifically comprises the following steps that are carried out continuously successively:

[0060] (1) The first esterification reaction process: continuously add terephthalic acid and ethylene glycol in a molar ratio of 1:1.5 into the first esterification reaction kettle, and control the flow rate of terephthalic acid to 1700kg / h, Carry out esterification reaction at 255°C to generate ethylene terephthalate;

[0061] (2) The second esterification reaction process: continuously feed the feed liquid in the first esterification reactor into the second esterification reactor, and feed ethylene glycol into the second esterification reactor at a flow rate of 50kg / h , lower the temperature of the system to 230°C, and under the protection of nitrogen, accurately add the hygroscopic mother liquor to the second es...

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Abstract

The invention relates to a preparation method of super cotton-like polyester fiber by continuous polymerizing melt direct spinning. The preparation method sequentially comprises the following steps of first esterification reaction procedure, second esterification reaction procedure, polymerizing reaction procedure and spinning procedure. The preparation method has the advantages that ethylene glycol, a reaction monomer containing a hydrophilic group, polyethylene glycol and an additive are prepared into a moisture absorbing mother liquid, the moisture absorbing mother liquid is added into the second esterification reaction procedure, the additive can be thinned by the preparation of the moisture absorbing mother liquid, the accurate adding is realized, the production of side reaction is reduced, and the spinnability and product stability are improved; the polyester melt can be continuously produced, and sent into the spinning equipment to directly spin, the super cotton-like polyester fiber is produced by the continuous melt direct spinning technique, the blending and drying procedure with conventional slices is reduced, and the cost is greatly reduced; the quality of the prepared super cotton-like polyester fiber is stable, and the product property is uniform.

Description

technical field [0001] The invention relates to a method for preparing continuous polymerization melt direct spinning super cotton-like polyester fiber. Background technique [0002] Polyester fiber is the largest variety of synthetic fiber, and its output accounts for more than 80% of the total output of chemical fiber. Because of its excellent cost performance, it is widely used in clothing fabrics and other non-clothing fields. However, due to its hydrophobic nature, it has poor water absorption and hygroscopicity, and lacks comfort when worn. How to prepare a polyester fiber with high sweat absorption, perspiration, and quick-drying for fabrics has been the goal that researchers and entrepreneurs have been striving for for many years. At present, there are mainly the following ways to achieve this: [0003] (1) Spinning copolyester fibers containing hydrophilic groups [0004] During the polyester synthesis process, structural units containing sulfonates or ether bond...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D01F6/92C08G63/688C08G63/78D01D5/253D01D5/08D01D5/12D01D10/02
Inventor 承耀明方小兵卞贤峰薛惠良
Owner SANFANGXIANG GROUP CO LTD
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