Polyester yarn with good rubber adhesion made of core-sheath fibers with two different types of polyesters
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United States of America Patent
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Jun 5, 2001
Grant Date -
N/A
app pub date -
Aug 6, 1993
filing date -
Aug 10, 1992
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Core-sheath fibers are useful as textile reinforcing materials in rubber items having rubber adhesion of 180 to 260 N/2 cm. The fiber core is a high-melting (co)polyester and the sheath is a high-melting unsaturated copolyester. The high-melting unsaturated copolyester is made from at least one unsaturated dicarboxylic acid coconstituent, which contains at least 2 mole-%, based on dicarboxylic acid components, of alkylmaleic acid, having a 1 to 18 carbon atom alkyl group; alkylenesuccinic acid having a 1 to 18 carbon atom alkylene group; or their polyester-forming derivatives.
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