Is a
Patent attributes
Patent Jurisdiction
Patent Number
Patent Inventor Names
Ravi R. Vedula0
Yinbing Xia0
Date of Patent
April 15, 2008
0Patent Application Number
108132180
Date Filed
March 30, 2004
0Patent Citations Received
Patent Primary Examiner
Patent abstract
Thermoplastic polyether polyurethane polymers are disclosed which are mixed with a non-polyether crosslinking agent to achieve long run times in a melt spinning process to make elastic fibers. The crosslinking agent is preferably a polyester polyol reacted with a diisocyanate. A melt spinning process is also disclosed using a polyether polyurethane with a polyester crosslinking agent. Long melt spinning run times can be achieved without experiencing excessive pressure buildup in the spinneret and fiber breakage.
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