Extruded closed-cell polypropylene foam
US5527573A · kind A · utility
55Cited by
14References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 4, 1994 |
| Grant date | Jun 18, 1996 |
| Priority date | — |
| Expiry date | Jun 4, 2014 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249992
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A closed-cell polypropylene foam, with at least eighty percent closed cells and a foamability characteristic of less than about 1.8 is disclosed. Also disclosed are several methods for making such closed-cell polypropylene foams.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.