Polymer processing system and apparatus
US6602064B1 · kind B1 · utility
15Cited by
20References
16Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 9, 2000 |
| Grant date | Aug 5, 2003 |
| Priority date | — |
| Expiry date | Sep 14, 2020 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/16
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The invention provides a counter-rotating extrusion system for processing foam material. The system is designed to introduce a physical blowing agent into the extruder, thoroughly disperse the blowing agent within the polymer melt and, preferably, to maintain relatively high pressures downstream from the point of blowing agent introduction. High quality polymeric foams, including microcellular foams, can be produced using the extrusion system. The system is particularly suitable for the production of foams using shear sensitive and degradable materials, such as PVC.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.