Gas-permeable, waterproof nonwoven fabric and process for its production
US4983450A · kind A · utility
37Cited by
3References
8Claims
0Family size
Assignees
Inventors
Key dates
| Filing date | Jul 28, 1988 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Jul 28, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T442/699
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A porous waterproof nonwoven fabric having a superior gas-permeability and waterproofness, capable of being produced at cheap cost under simple processing conditions and by means of simple processing equipments, having superior mechanical strengths and a good feeling and useful for disposable uses and a process for producing the fabric are provided, which fabric comprises a thermoplastic resin composition film comprising a thermoplastic resin and a specified quantity of a filler, the thermoplastic resin composition film having fine pores formed by calender processing.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.