Claims
- 1. A method for producing a non-oriented film that comprises depositing high molecular weight polyolefin powder on a smooth non-adherent substrate, sintering said deposited powder at a sintering temperature just below the melting temperature of the polyolefin, rolling in a longitudinal direction the sintered powder held at the sintering temperature with at least one unheated roller at a pressure sufficient to effect densification of the polyolefin normal to its surface but insufficient to effect significant longitudinal flow of the polyolefin to form a non-oriented void free film, and quenching and stripping said film from said substrate.
- 2. The method of claim 1, wherein said polyolefin is high density polyethylene.
CROSS-REFERENCE TO RELATED APPLICATIONS
This application is a continuation-in-part of copending application Ser. No. 108,924, filed Dec. 31, 1979 now abandoned.
US Referenced Citations (2)
Number |
Name |
Date |
Kind |
3400186 |
Wiley |
Sep 1968 |
|
3975481 |
Baumgaertner |
Aug 1976 |
|
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
108924 |
Dec 1979 |
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