Cups, plates, trays or containers formed from laminates containing filled polystyrene
US4111349A · kind A · utility
26Cited by
10References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 14, 1976 |
| Grant date | Sep 5, 1978 |
| Priority date | — |
| Expiry date | Sep 14, 1996 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31924
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
Thermoplastic polymeric laminates are prepared which have one layer of filled styrene polymer composition, and at least one layer of a dissimilar polymer selected from polyolefins such as polyethylene, polypropylene and polybutene, and nitrile group containing barrier polymers. The filled styrene polymer composition contains from 5 to 50 parts by weight filler, and is the product of mixing a styrene polymer masterbatch of impact polystyrene, filler, rubber and oil with polystyrene. The laminates can be used for thermoforming thin walled articles such as cups, plates, trays and containers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.