Porous film
US4794128A · kind A · utility
13Cited by
8References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 27, 1987 |
| Grant date | Dec 27, 1988 |
| Priority date | — |
| Expiry date | May 27, 2007 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08J2323/02
- WIPO fieldMedical technology
- WIPO sectorInstruments
Abstract
A porous film comprises a polyolefin resin, a filler and a polyester obtained from a polybasic acid, a polyhydric alcohol and a monobasic acid having 14 to 22 carbon atoms and/or a monohydric alcohol having 12 to 22 carbon atoms or a polyester obtained from a polybasic acid and a monohydric alcohol, the film being obtained by melting and moulding and then stretching. It has a good permeability to moisture and impermeability to liquid, and is useful for a sanitary napkin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.