Process for pressure sintering polymeric compositions
US5167889A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jun 10, 1991 |
| Grant date | Dec 1, 1992 |
| Priority date | — |
| Expiry date | Jun 10, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C43/14
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for heat treating polymeric compositions into a shaped article comprising the steps of: PA0 a. placing a polymeric composition into a molding means; PA0 b. adding a compactible material to the molding means to surround the polymeric composition; PA0 c. pressuring the molding means containing the polymeric composition to force its particles into intimate contact with the compactible material, and clamping the molding means so as to maintain the pressurized state; PA0 d. heat treating the pressurized molding means containing the polymeric composition to form a densified, shaped article; and PA0 e. releasing the pressure on the molding means and removing the heat treated, shaped article.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.