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Polyester fiber structures

Inactive Publication Date: 2006-03-16
TEJIN FIBERS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0014] It is an object of the invention to solve the aforementioned problems of the prior art by providing a polyester fiber structure having satisfactory color tone (a high L* value and a low b* value), produced from high quality polyester fiber.

Problems solved by technology

A problem is associated with the use of antimony compounds, however, because prolonged continuous melt spinning of polyesters results in accumulated adhesion of foreign matter around the spinneret hole (hereinafter referred to simply as “spinneret adhesion” and redirection of the molten polymer flow (bending), which ultimately lead to fluff and yarn breakage or mottling of the physical properties of the fiber during the spinning and stretching steps.
In addition, using polyester fibers comprising such polyesters for production of polyester fiber structures has resulted in problems such as poor process stability and low quality of the obtained polyester fiber structures.
While these methods do enhance the molten heat stability of polyesters to some degree, the enhancing effect is inadequate and the obtained polyester resins are in need of color tone improvement.
However, although this method enhances the molten heat stability to some degree, the effect has been inadequate and the obtained polyesters are in need of color tone improvement.

Method used

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  • Polyester fiber structures
  • Polyester fiber structures
  • Polyester fiber structures

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0189] After charging 0.009 part of tetra-n-butyl titanate into a mixture of 100 parts of dimethyl terephthalate and 70 parts of ethylene glycol in a pressure reaction-capable stainless steel reactor, pressurization was conducted at 0.07 MPa for transesterification reaction while increasing the temperature from 140° C. to 240° C., and then 0.04 part of triethyl phosphonoacetate was added to terminate the transesterification reaction.

[0190] The reaction product was then transferred to a polymerization reactor, the temperature was raised to 290° C., and polycondensation reaction was conducted in a high vacuum of no greater than 26.67 Pa to obtain a (delustering agent-free) polyester with a limiting viscosity of 0.60, a diethylene glycol content of 1.5 wt % and a melting point of 254° C.

[0191] The obtained polyester was prepared into chips and dried by ordinary procedures. The dried chips were used for spinning, stretching, cutting, etc. according to ordinary methods to obtain polyes...

example 2

[0193] The same procedure was carried out as in Example 1, except that 0.016 part of titanium trimellitate synthesized by the method described in the reference example was used as the titanium compound. The results are shown in Table 1.

examples 3-5

, Comparative Examples 1-3

[0194] The same procedure was carried out as in Example 1, except for adding the titanium compounds and phosphorus compounds listed in Table 1 in the indicated amounts. The results are shown in Table 1.

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Abstract

Polyester fiber structures having good color tones (low b* values) and being excellent in moldability can be made from polyester fiber produced in the presence of a catalyst which comprises (I) a mixture consisting of a Ti compound component composed of one or more members selected from among titanium alkoxides of the general formula (I) and products of reaction of these alkoxides with carboxylic acids of the general formula (II) or anhydrides thereof and a P compound component consisting of a compound of the general formula (III) and / or (2) a product obtained by reacting a Ti compound component composed of one or more members selected from among titanium alkoxides of the general formula (IV) and products of reaction of these alkoxides with carboxylic acids of the general formula (II) or anhydrides thereof with a P compound component consisting of a compound of the general formula (V).

Description

TECHNICAL FIELD [0001] The present invention relates to a polyester fiber structure. More specifically, it relates to a polyester fiber structure produced using a polyester resin with satisfactory color tone and excellent moldability. BACKGROUND ART [0002] Polyester resins, and particularly polyethylene terephthalate, polyethylene naphthalate, polytrimethylene terephthalate and polytetramethylene terephthalate resins, exhibit excellent mechanical, physical and chemical performance and are therefore widely used for fibers, films and other molded products. Especially when used in fiber structures, they are known to exhibit excellent mechanical strength and dimensional stability. [0003] Such polymers for fiber structures, for example polyethylene terephthalate, are usually produced by first preparing an ethylene glycol ester of terephthalic acid and / or a lower polymer thereof and then heating it under reduced pressure in the presence of a polymerization catalyst for reaction to the des...

Claims

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Application Information

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IPC IPC(8): D04H1/54D04H1/00D02G3/00C08G63/85C08G63/87D01F6/62D04H1/42
CPCC08G63/85C08G63/87Y10T428/2904D04H1/42Y10T428/2929D01F6/62D04H1/435Y10T442/69Y10T442/637Y10T442/696Y10T442/638Y10T442/692D04H1/43828D04H1/43835D04H1/43832D04H1/541
Inventor INAGAKI, KENJIBABA, KENJISUZUKI, ATSUSHI
Owner TEJIN FIBERS LTD
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