Resinous foam formulation for self-skinning cover material
US5238622A · kind A · utility
20Cited by
11References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 22, 1991 |
| Grant date | Aug 24, 1993 |
| Priority date | — |
| Expiry date | Nov 22, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/60
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method of producing a molded foam article having an integral skin and a backing layer of foam comprising mixing particles of two polyvinyl compounds one of the compounds having a molecular weight less than that of the other compound and a higher solvating plasticizer than that of the other compound and casting the mixture against a heated mold surface and melting the one compound to flood the interstices of the particles of the other compound and float to the surface of the heated mold to form a skin and wherein the other compound includes foaming constituents to simultaneously form a layer of foam material behind the skin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.