Process for producing porous film or sheet
US4472328A · kind A · utility
168Cited by
8References
5Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Mar 2, 1982 |
| Grant date | Sep 18, 1984 |
| Priority date | — |
| Expiry date | Mar 2, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/13
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for producing a porous film or sheet, which comprises melt-molding a composition prepared by compounding 100 parts by weight of a polyolefin resin with 25 to 400 parts by weight of a filler and 1 to 100 parts by weight of a liquid or waxy hydrocarbon polymer into film or sheet, and stretching the resulting film or sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.