Innerduct
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United States of America Patent
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Apr 21, 2015
Grant Date -
Mar 19, 2015
app pub date -
Sep 16, 2013
filing date -
Sep 16, 2013
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Abstract
A seamless and integrated textile innerduct having: a warp composed of polyester monofilament yarns and a weft composed of polyester multifilament yarns, wherein the warp has 70-85 ends per inch, the weft has 14-25 ends per inch, the warp and weft are integrated seamlessly to form an elongated enclosure having breaking strength of at least 1000 pounds, a vertical retraction rate of less than 3% at 150° C. for a duration of one hour, a longitudinal shrinkage rate of less than 3% at −80° C.; a pulling strip is placed inside the enclosure; the pulling strip is made of polyester multifilament yarns; and the inner duct is flexible and stretchable longitudinally.
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