Process for producing fibers for high strength non-woven materials
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United States of America Patent
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Mar 16, 1999
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N/A
app pub date -
Dec 29, 1997
filing date -
Dec 19, 1994
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Abstract
Process of producing a polypropylene containing fiber and the resulting fiber and non-woven articles. The process involves the extruding of polypropylene containing material having a broad molecular weight distribution to form a hot extrudate having a surface, and quenching the hot extrudate in an oxidative atmosphere so as to effect oxidative chain scission degradation of the surface to obtain a fiber having a higher average melt flow rate as compared to an average melt flow rate of an inner, non-degraded portion thereof, and containing at least 7 percent of molecules having a molecular weight greater than 5.times.10.sup.5.
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