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Polyester different-contraction commingled yarn

a technology of commingled yarn and polymer, which is applied in the direction of yarn, monocomponent polyester artificial filament, transportation and packaging, etc., can solve the problems of insufficient enhancing effect, inability to achieve color tone improvement, and inability to break or mottle the physical properties of filament, etc., to achieve satisfactory color tone, no fluff, and high quality

Inactive Publication Date: 2009-01-22
TEJIN FIBERS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The invention provides polyester different-contraction commingled yarn that solves the problems of the prior art by providing yarn with good color tone, no fluff, and a high-quality feel. The yarn is made by using a special catalyst made of titanium compounds and phosphorus compounds, which helps to control the different rates of shrinkage in the yarn. The yarn is made by mixing two different types of filaments with different boiling water shrinkage ratios. The resulting yarn has excellent bulk and a wool-like feel."

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 filament breakage or mottling of the physical properties of the filament during the spinning and drawing steps.
While these methods do enhance the molten heat stability of polyesters to some degree, the enhancing effect is inadequate and the obtained polyester polymers are in need of color tone improvement.
However, although this method enhances the molten heat stability to some degree, the effect is inadequate and the obtained polyesters are in need of color tone improvement.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Examples

Experimental program
Comparison scheme
Effect test

example 1

Preparation of Titanium Compound

[0152]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

[0153]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 of Catalyst:

[0154]Next...

example 2

[0165]After charging 0.009 part of tetra-n-butyl titanate (TBT) into a mixture of 100 parts by mass of dimethyl terephthalate and 70 parts by mass 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 0.035 part by mass of triethyl phosphonoacetate (TEPA) was added to terminate the transesterification reaction.

[0166]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 polyester with a limiting viscosity of 0.630 and a diethylene glycol content of 1.5%, which was pelleted by an ordinary method.

[0167]The pellets were used as starting material for spinning at a spinning speed of 3200 m / min to obtain 90 dtex / 24 filaments polyester partially oriented yarn (single filament s...

example 3

[0171]The same procedure was carried out as in Example 2, except that 0.016 part of titanium trimellitate (TMT) synthesized by the method described below was used as the titanium compound. The evaluation results for the obtained dyed cloth are shown in Table 2.

Titanium Trimellitate Synthesis Method:

[0172]Tetrabutoxytitanium was added to a solution of trimellitic anhydride in ethylene glycol (0.20%) at ½ mole with respect to the trimellitic anhydride, and reaction was conducted for 60 minutes in air at normal pressure while maintaining a temperature of 80° C., after which the system was cooled to ordinary temperature and the produced catalyst was recrystallized with a 10-fold amount of acetone, and then the precipitate was filtered out with filter paper and dried at 100° C. for 2 hours to obtain the target compound.

Comparative Example 4

[0173]After charging 0.064 part by mass of calcium acetate monohydrate into a mixture of 100 parts by mass of dimethyl terephthalate and 70 parts by m...

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Abstract

High-quality differential-shrinkage polyester combined filament yarn having good color tone and being free from fluffing can be made from a polyester polymer produced by using a catalyst comprising (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 (I) 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 (IV).

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application is a divisional of U.S. application Ser. No. 10 / 542,373, filed Jul. 14, 2005, which is a National Stage application of PCT / JP03 / 16755, filed Dec. 25, 2003, the entire disclosure of which is hereby incorporated by reference.TECHNICAL FIELD[0002]The present invention relates to a polyester different-contraction commingled yarn. More specifically, it relates to a polyester different-contraction commingled yarn produced using polyester polymers with satisfactory color tone and excellent moldability.BACKGROUND ART[0003]Polyester filaments exhibit excellent mechanical, physical and chemical performance and are therefore widely employed for filament uses.[0004]It has been attempted to utilize filaments made of polyester polymers to obtain bulky filaments, and for example, there have been proposed filaments with different shrinkage ratios being disposed as core filaments and sheath filaments (for example, Japanese Unexamined Paten...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): D02G3/02C08G63/85D01F6/62D02G1/18D02G3/04D02J1/08
CPCC08G63/85D02G1/18Y10T428/2929Y10T428/2931D02J1/08D01F6/62D02G3/04
Inventor MIZUMURA, TOMOOMIYASAKA, NOBUYOSHITSUKAMOTO, RYOJIHATTORI, KEIJIROOSAKA, HIROYUKI
Owner TEJIN FIBERS LTD
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