Melt-spun elastoester multifilament yarns

Inactive Publication Date: 2008-06-12
EI DU PONT DE NEMOURS & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0077]An advantage of this invention is that spun drawn yarns can be prepared using higher draw ratios than disclosed in U.S. Pat. No. 6,562,457 and U.S. Pat. No. 6,599,625 for the same polyether esters. This can be accomplished by using a lower spin speed than normal, and then drawing at previously used speeds. When carrying out this process, there are fewer breaks than previously encountered.

Problems solved by technology

These spinning conditions are too slow for practical commercialization of the fibers.

Method used

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  • Melt-spun elastoester multifilament yarns
  • Melt-spun elastoester multifilament yarns
  • Melt-spun elastoester multifilament yarns

Examples

Experimental program
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Effect test

example 1

[0111]This example describes preparation of a polyether ester elastomer having a polytrimethylene ether ester soft segment and a tetramethylene ester hard segments, as described in U.S. Pat. No. 6,562,457. The polymer was designed to have a 72 / 28 weight ratio of soft segments to hard segments. The polymer was prepared using a batch process from dimethyl terephthalate, 1,4-butanediol and polytrimethylene ether glycol.

[0112]An autoclave reactor equipped with an agitator, vacuum jets and a distillation still was charged with 8.81 kg of dimethyl terephthalate, 8.94 kg of 1,4-butanediol, 20.2 kg of polytrimethylene ether glycol of number average molecular weight 2019, 22 g of tetraisopropyl titanate polymerization catalyst, and 37.5 g of ETHANOX 330 antioxidant (Albemarle Corporation). The temperature of the reactor was gradually raised to 210° C., and approximately 2.6 kg of methanol were recovered by distillation from the reactor. The reaction was continued further at 250° C. under red...

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Abstract

This invention relates to a method of melt-spinning a polyether ester thermoplastic elastomer under commercially viable conditions to produce an elastoester multifilament yarn, wherein the polyether ester thermoplastic elastomer is a polytrimethylene ether ester comprising a polytrimethylene ether dicarboxylate ester soft segment and hard segment selected from a trimethylene dicarboxylate ester and / or a tetramethylene dicarboxylate ester hard segment.

Description

FIELD OF THE INVENTION[0001]This invention relates to a method of melt-spinning a polyether ester thermoplastic elastomer under commercially viable conditions to produce an elastoester multifilament yarn, wherein the polyether ester thermoplastic elastomer is a polytrimethylene ether ester comprising a polytrimethylene ether dicarboxylate ester soft segment and hard segment selected from a trimethylene dicarboxylate ester and / or a tetramethylene dicarboxylate ester hard segment.BACKGROUND OF THE INVENTION[0002]The name “elastoester” is, in the USA, a generic description in the context of a fiber that contains at least 50% by weight of an aliphatic polyether and at least 35% by weight of a polyester. An elastoester is stretchy like a spandex, readily washable, and capable of withstanding high temperatures when wet. Elastoesters are said to retain dyes better than fabrics made of nylon and spandex, and are less likely to be discolored or adversely affected by chlorine, which is an imp...

Claims

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Application Information

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IPC IPC(8): D01G1/00
CPCD01F6/86
Inventor CHANG, JING C.SUNKARA, HARI BABU
Owner EI DU PONT DE NEMOURS & CO
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