James E Waggoner

US Patent:

6136911, Oct 24, 2000

Filed:

Jun 30, 1998

Appl. No.:

9/101118

Inventors:

Hyunkook Shin - Wilmington DE
James Ross Waggoner - Midlothian VA
John Edward Armstrong - Newark DE

Assignee:

E.I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D01D 511
D01F 632
C08J 309
C08L 2712

US Classification:

524463

Abstract:

A flash-spun material comprised of at least 20% partially fluorinated hydrocarbon polymers in which between 10% and 70% of the total number of hydrogen atoms in each hydrocarbon polymer are replaced by fluorine atoms. The partially fluorinated hydrocarbon polymers is preferably comprised of at least 80% by weight of polymerized monomer units selected from ethylene, tetrafluoroethylene, chlorotrifluoroethylene, vinylidene fluoride and vinyl fluoride. The flash-spun material may be a plexifilamentary strand or a microcellular foam. Also provided is a process for producing flash-spun material from partially fluorinated hydrocarbon polymers in a solvent and a solution from which such polymers may be flash-spun.

US Patent:

60046724, Dec 21, 1999

Filed:

Jun 30, 1998

Appl. No.:

9/101088

Inventors:

Hyunkook Shin - Wilmington DE
James Ross Waggoner - Midlothian VA
Sam Louis Samuels - Landenberg PA
Michael Allen Bryner - Midlothian VA
Rudolph Francis Janis - Richmond VA

Assignee:

E. I. du Pont de Nemours and Company - Wilmington DE

International Classification:

D02G 300

US Classification:

428364

Abstract:

This invention is directed to a flash spun plexifilamentary strand material comprising blends of thermoplastic material including polyethylene and polypropylene, the resulting strand has a unique morphology comprising a three dimensional integral plexus of semicrystalline fibrous elements.