Uniform small cell foams and a continuous process for making same
US6391931B1 · kind B1 · utility
17Cited by
26References
5Claims
0Family size
Inventors
Key dates
| Filing date | Apr 28, 1999 |
| Grant date | May 21, 2002 |
| Priority date | — |
| Expiry date | Apr 28, 2019 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249986
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A continuous method for making foams having uniform and/or small cell sizes and articles made with these foams are described. The method allows for adjusting or controlling cell size and cell size distribution by controlling temperature and/or blowing agent concentration. The foams feature small and/or uniform cell sizes and may be comprised of amorphous thermoplastic polymers, pressure sensitive adhesive compositions, and immiscible thermoplastic polymer compositions. A method for coextruding the foams is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.