Thermoformable laminated packaging material
US4927690A · kind A · utility
15Cited by
10References
4Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Nov 28, 1988 |
| Grant date | May 22, 1990 |
| Priority date | — |
| Expiry date | Nov 28, 2008 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31928
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A rigid thermoformable packaging material is provided which includes an outer layer of a nonfoamed oriented polystyrene and an inner layer of a functional polymer resin. The laminated packaging material can be produced by either thermal lamination or coextrusion. The packaging material is readily thermoformed into containers for medical or dental products or foods and is heat sealable, tough, resistant to chemicals, and resistant to cracking and tearing during handling by thermoforming equipment.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.