Polyolefin layer with improved adhesion to a foamed plastic substrate and a method for its manufacture
US4457729A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 31, 1981 |
| Grant date | Jul 3, 1984 |
| Priority date | — |
| Expiry date | Aug 31, 2001 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/249993
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A rotational molding process for manufacturing objects having a foamed plastic substrate adhered to an outer polyolefin coating layer, and having improved adhesion therebetween comprising the combination of steps of: preparing a first outer coating layer of a stabilized polyolefin; forming a second inner layer of an at most slightly stabilized polyolefin contiguous with and on the interior surface of said first outer layer; and thereafter introducing a foamable plastic material onto the interior surface of said second layer and foaming said plastic material thereagainst thereby the foamed plastic is bonded to said second interior surface.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.