Leisure articles and cars prepared by multilayer rotational moulding
US9919491B2 · kind B2 · utility
0Cited by
2References
20Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 3, 2015 |
| Grant date | Mar 20, 2018 |
| Priority date | — |
| Expiry date | Jun 27, 2036 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1376
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Multilayer articles having reinforced structural properties are prepared by rotational molding of external and internal skin layers prepared from polyethylene resin and an intermediate layer prepared from foamed polyethylene. The composition of the external layer is fed as a dry blend into a mold, and the mold is placed in a pre-heated oven and rotated. The composition of the intermediate layer is fed as a dry blend into the mold, and the mold is placed in a pre-heated oven and rotated. The composition of the internal layer is fed as a dry blend into the mold, and the mold is placed in a pre-heated oven and rotated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.