Method for preparing high-flexibility PET copolymer used in spun-lace non-woven fabrics

A spunlace non-woven fabric, high flexibility technology, applied in the direction of single-component copolyester artificial filament, etc., to achieve the effect of tight combination, shortened reaction time, and improved environmental protection

Inactive Publication Date: 2010-05-12
JIANGYIN BOLUN CHEM FIBER
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  • Abstract
  • Description
  • Claims
  • Application Information

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  • Method for preparing high-flexibility PET copolymer used in spun-lace non-woven fabrics
  • Method for preparing high-flexibility PET copolymer used in spun-lace non-woven fabrics

Examples

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Example Embodiment

[0030] Example: PEG-PET (PEG molecular weight is 400~600)

[0031] 1. Terephthalic acid, isophthalic acid and ethylene glycol are stirred in the slurry mixing tank according to the set density or molar ratio (1:0.02~0.05:1~2.2), and pumped to the slurry feeding tank. The slurry feeding tank enters the esterification kettle through the slurry injection nozzle, and the slurry is uniformly mixed and reacted through the circulation principle of the thermosyphon or the action of the agitator. The esterified oligomer together with various additives on the pipeline through a gear pump:

[0032] The catalyst is an antimony and titanium compound catalyst, injected through an additive nozzle, the addition amount is based on the content in the polyester chip, titanium is 10ppm, antimony is 8ppm, polyphosphoric acid is injected in another nozzle, and the addition amount is in the polyester The content of PEG is 12ppm. The flexible group PEG is injected through another nozzle and added through...

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Abstract

The invention relates to a method for preparing a high-flexibility PET copolymer used in spun-lace non-woven fabrics, which comprises the following technological processes: (1) stirring p-phthalic acid, m-phthalic acid and glycol in a sizing agent mixing tank in a set mol ratio, pumping the mixture into a sizing agent feeding tank, feeding the mixture into an esterifying kettle through a sizing agent injection nozzle from the sizing agent feeding tank, and evenly mixing and reacting the sizing agent according to a cycle theory of a thermosiphon or under the action of a stirrer; and (2) injecting an oligomer after the esterification and each additive on a pipeline into a pre-polymerization kettle by a gear pump, introducing the materials into a final-polymerization kettle when the materials reach the upper part of the pre-polymerization kettle, filtering a product after the final polymerization by a melt filter, and towing the product to a dicing cutter to prepare polyester slices. The additives in a condensation polymerization process comprise a compound catalyst of antimony and titanium, a flexible radical PEG and a stabilizing agent polyphosphoric acid. The preparation method generates a PEG-PET block copolymer by connecting the flexible radical PEG to a PET trunk chain and adopting a copolymerization method. The fiber produced by using the copolymer has excellent flexibility.

Description

(1) Technical field [0001] The invention relates to a preparation method of a highly flexible PET copolymer applied to spunlace non-woven fabrics. The invention belongs to the technical field of chemical fiber materials. (2) Background technology [0002] Fiber materials are the basis of clothing fabrics and various fabrics. The emergence of new fiber materials will bring about the emergence of a variety of new fabrics, and will play a positive role in promoting the development of fashion and other industries. This requires the design and development of new fibers and new fabrics to continuously provide new materials for the manufacture of new fashions. [0003] Polyester fibers are used not only for clothing but also for industrial purposes due to their excellent mechanical properties such as dimensional stability and durability. Among them, rubbers such as tire cords, V-belts, conveyor belts, and hoses are widely used. PET has become the most successful variety in chemi...

Claims

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Application Information

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IPC IPC(8): C08G63/672C08G63/86D01F6/84
Inventor 卞惠刚
Owner JIANGYIN BOLUN CHEM FIBER
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