Polymer foam processing with low blowing agent levels
US6593384B2 · kind B2 · utility
67Cited by
18References
86Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 7, 2000 |
| Grant date | Jul 15, 2003 |
| Priority date | — |
| Expiry date | Feb 8, 2021 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C44/348
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Systems and techniques for forming microcellular polymeric material, via injection molding, blow molding, continuous extrusion, or the like, at very low blowing agent levels, are described. The invention involves, in one aspect, the discovery of a region of very low blowing agent level where, surprisingly, microcellular material can be formed. Articles with particularly good surface properties are provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.