Modified cross-section polyester fibers

Inactive Publication Date: 2006-09-21
TEJIN FIBERS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0055] The polycondensation catalyst comprises at least one selected from among (1) mixtures of the titanium compound component (A) and phosphorus compound component (B) described below and (2) reaction products of the titanium compound component (C) and phosphorus compound component (D) described below.
[0056] The titanium compound (A) of the mixture (1) for the polycondensation catalyst is comprised at least one compound selected from the group consisting of:
[0057] (a) titanium alkoxides represented by the following genera

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 filaments during the spinning and drawing steps.
Particularly when it is attempted to produce filaments with modified lateral cross-sections by melt spinning, the complex shape

Method used

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  • Modified cross-section polyester fibers
  • Modified cross-section polyester fibers
  • Modified cross-section polyester fibers

Examples

Experimental program
Comparison scheme
Effect test

Example

Example 1

Preparation of Titanium Compound:

[0199] A 2 L three-necked flask equipped with a function allowing mixing and stirring of the contents was prepared, 919 g of ethylene glycol and 10 g of acetic acid were placed therein, and after stirring and mixing, 71 g of titanium tetrabutoxide was slowly added to obtain a (transparent) solution of a titanium compound in ethylene glycol. This solution will hereinafter be abbreviated as “TB solution”. The titanium atom concentration of the solution was 1.02%.

Preparation of Phosphorus Compound:

[0200] A 2 L three-necked flask equipped with a function allowing heating, mixing and stirring of the contents was prepared, and 656 g of ethylene glycol was placed therein and heated to 100° C. while stirring. Upon reaching 100° C., 34.5 g of monolauryl phosphate was added, and the mixture was heated, mixed and stirred to dissolution to obtain a transparent solution. This solution will hereinafter be abbreviated as “P1 solution”.

Preparation o...

Example

Examples 2-3, Comparative Example 1

[0207] The same procedure was carried out as in Example 1, except that the spinneret was replaced for discharge holes to produce the shapes shown in FIGS. 1(b) and (c) and a round single filament cross-sectional shape. The results are shown in Table 1.

Example

Comparative Example 2

[0208] The same procedure was carried out as in Example 1, except that the polycondensation catalyst was changed to a 1.3% solution of antimony trioxide in ethylene glycol, the charged amount was 4.83 parts by mass, and there was further charged 0.121 part by mass of a 25% solution of trimethyl phosphate in ethylene glycol as a stabilizer. The results are shown in Table 1.

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Abstract

Polyester fibers having a deformed section are produced from a polyester polymer which is obtained by polycondensing an aromatic dicarboxylate ester in the presence of a catalyst containing a mixture of a Ti component (A) comprising at least one a titanium alkoxide or a reaction product thereof with a specific carboxylic acid or its anhydride with a P compound component (B) represented by the following general formula (III) and/or a reaction product of a Ti compound component (C) with a P compound component (D) represented by the following general formula (IV). The obtained fibers have a favorable color tone and excellent qualities without showing fluffing.

Description

TECHNICAL FIELD [0001] The present invention relates to modified cross-section polyester fibers. More specifically, it relates to modified cross-section polyester fibers produced using a polyester polymer with satisfactory color tone and excellent moldability. BACKGROUND ART [0002] Polyester polymers, and particularly polyethylene terephthalate, polyethylene naphthalate, polytrimethylene terephthalate and polytetramethylene terephthalate, exhibit excellent mechanical, physical and chemical performance and are therefore widely used for fibers, films and other molded products [0003] Such polyester polymers, 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 desired degree of polymerization. Other polyesters are produced by similar processes. [0004] It is known that the type ...

Claims

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Application Information

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IPC IPC(8): D02G3/00C08G63/85C08G63/181C08K5/51D01D5/253D01F6/62
CPCC08G63/181C08G63/85C08K5/51D01D5/253Y10T428/2978Y10T428/2975Y10T428/2976Y10T428/2973D01F6/62
Inventor MASUDA, TSUYOSHIKAMIYAMA, MIEMIZUMURA, TOMOOMIYASAKA, NOBUYOSHITSUKAMOTO, RYOJIHATTORI, KEIJIRONAKAJIMA, SUGURUKIKUCHI, KATUSHIOSAKA, HIROYUKI
Owner TEJIN FIBERS LTD
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