Treatment of brittle, high-modulus yarns to yield improved processing characteristics
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United States of America Patent
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Nov 17, 2009
Grant Date -
Jun 28, 2007
app pub date -
Dec 22, 2005
filing date -
Dec 22, 2005
priority date (Note) -
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status (Latency Note)
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Abstract
Multifilamentary core yarns of brittle, high-modulus materials are partially encased in a “wrapper” of another material. The wrapped core yarn is then coated with an adhesive that remains tacky over time. The coated wrapped yarn can then be spooled and stored indefinitely; when it is desired to be used, the yarn can be pulled off the spool without “blocking”, that is, the presence of the wrapper precludes damage to the brittle filaments of the core yarn caused by filaments of adjacent strands of the yarn adhering to one another. The tacky surface allows the yarn to be disposed where desired against a substrate, and heat and pressure to be applied to ensure that it will remain in position. Various processes previously not feasible with brittle, high-modulus multifilamentary yarns can be practiced.
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