Biaxially stretched composite styrene resin sheet
US4835041A · kind A · utility
3Cited by
4References
9Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 23, 1987 |
| Grant date | May 30, 1989 |
| Priority date | — |
| Expiry date | Jun 23, 2007 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31924
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A biaxially stretched composite styrene resin sheet of a multilayer structure, comprising at least one layer of polystyrene and at least two layers of a mixture of polystyrene and styrene/butadiene block copolymer resin, wherein both outside layers are formed of said mixture, the thickness of each of the outside layers is 1 to 20% of the total thickness of the sheet, and the entire sheet is biaxially stretched.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.