PASTE-PROCESSED ULTRA HIGH MOLECULAR WEIGHT POLYETHYLENE EXPANDED INTO DENSE ARTICLES

Paste-processed ultra high molecular weight polyethylene (UHMWPE) polymers, and processes for the formation of dense UHMWPE films from a highly crystalline ultra high molecular weight polyethylene polymer are provided. The UHMWPE films described herein may be manufactured by 1) compressing a dry, po...

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Bibliographische Detailangaben
Hauptverfasser:	STRID, Jason J, SBRIGLIA, Guy A, JACKMAN, Spencer D
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F,C08G AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING CHEMISTRY COMPOSITIONS BASED THEREON GENERAL PROCESSES OF COMPOUNDING METALLURGY ORGANIC MACROMOLECULAR COMPOUNDS PERFORMING OPERATIONS SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDEDFOR SHAPING OR JOINING OF PLASTICS THEIR PREPARATION OR CHEMICAL WORKING-UP TRANSPORTING WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL WORKING-UP
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Beschreibung
Zusammenfassung:	Paste-processed ultra high molecular weight polyethylene (UHMWPE) polymers, and processes for the formation of dense UHMWPE films from a highly crystalline ultra high molecular weight polyethylene polymer are provided. The UHMWPE films described herein may be manufactured by 1) compressing a dry, porous UHMWPE tape and then stretching above the melt temperature of the UHMWPE polymer; 2) expanding a dry, porous UHMWPE tape above the melt of the UHMWPE polymer without compression; or 3) expanding a dry, porous UHMWPE tape below the melt of the UHMWPE polymer to form a porous membrane and subsequently compressing the porous membrane at temperatures above the melt of the UHMWPE polymer to forma dense film. This dense film may be further stretched biaxially to enhance the properties of the dense film.