Microfibers-generating fibers and a woven or non-woven fabric of microfibers
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United States of America Patent
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Mar 1, 1994
Grant Date -
N/A
app pub date -
Feb 7, 1992
filing date -
Feb 7, 1991
priority date (Note) -
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Abstract
A web or a fibers consisting of microfibers having a fineness of 0.01 denier or less is provided, which web or fibers is obtained by spinning conjugate fibers consisting of microfibers-generating fibers of island-in-sea type, according to melt blown process, the sea component being a thermoplastic resin (polyvinyl alcohol) capable of being removed with a solvent (water) and the island component being a thermoplastic resin (polypropylene) insoluble in the solvent used for the sea component, followed by collecting the spun conjugate fibers in the form of a web or a tow; the resulting composite fibers being thinner than those obtained according to conventional conjugate spinning and the microfibers obtained by removing the sea component also being thinner than fibers obtained from conventional conjugate fibers of island-in-sea type.
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