发明名称 |
BICOMPONENT FIBERS AND METHODS FOR MAKING THEM |
摘要 |
<p>The present invention relates to bicomponent polymer fibers, and to processes for forming those fibers. Bicomponent polymer fibers are described, having a core comprising a core polymer and a sheath comprising a sheath polymer, wherein the sheath polymer is a polyolefin having an Mw less than about 65,000 g/mol. The core polymer has an Mw at least about 20,000 g/mol greater than the Mw of the sheath polymer. Processes for forming bicomponent fibers are also described, comprising (i) forming a molten blend of a core polymer and a sheath polymer; (ii) extruding the molten polymer blend using an extrusion die having a length to diameter ratio greater than or equal to about 10 and under shear conditions sufficient to drive the sheath polymer to the die wall; and (iii) forming meltblown fibers having a core comprising the core polymer and a sheath comprising the sheath polymer.</p> |
申请公布号 |
EP2638190(B1) |
申请公布日期 |
2015.04.22 |
申请号 |
EP20110779287 |
申请日期 |
2011.10.18 |
申请人 |
EXXONMOBIL CHEMICAL PATENTS INC. |
发明人 |
RICHESON, GALEN, C.;WESTWOOD, ALISTAIR, D.;MEHTA, ASPY, K. |
分类号 |
D01D5/06;D01F6/46;D01F8/06 |
主分类号 |
D01D5/06 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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