Gas-permeable, waterproof film and process for its production
US5078931A · kind A · utility
5Cited by
20References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 31, 1990 |
| Grant date | Jan 7, 1992 |
| Priority date | — |
| Expiry date | May 31, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/62
- WIPO fieldMacromolecular chemistry, polymers
- WIPO sectorChemistry
Abstract
A porous waterproof film having a superior gas-permeability and waterproofness, capable of being produced under simple processing conditions, by means of simple processing equipments and at cheap cost, having superior mechanical strengths and also suitable for disposable use applications and a process for producing the film are provided, which film is obtained by subjecting a thermoplastic resin composition film comprising a thermoplastic resin and a specified quantity of a filler based on the thermoplastic resin to calender processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.