Process for preparing thermoinsulating and/or structural formed articles and products so obtained
US5262117A · kind A · utility
2Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1992 |
| Grant date | Nov 16, 1993 |
| Priority date | — |
| Expiry date | Sep 14, 2012 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2623/12
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A process for preparing thermoinsulating and structural formal articles in which PA1 (a) a thermoplastic polymer sheet is heated at a temperature above its softening point; PA1 (b) the heated thermoplastic polymer sheet is thermoformed on a thermoinsulating foamed preform made of substantially the same polymeric material; and in which PA1 (c) prior to the thermoforming in step (b), the thermoinsulating foamed preform is cooled to prevent excessive collapse of the surface of the thermoinsulating foamed preform resulting from contact with the heated sheet.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.