Method of producing resin sheet with roughened surface
US5169583A · kind A · utility
9Cited by
6References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 9, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | May 9, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2995/0073
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A crystalline resin sheet having one, smooth surface and the other, roughened surface is produced by extruding a melt of the resin through a die to form a molten sheet, the molten sheet being subsequently contacted, at only one of the both surfaces thereof, with a cooled, smooth surface maintained at a temperature lower by 20.degree.-90.degree. C. than the melting point of the resin to solidify the molten sheet and to make the contacted surface of the sheet smooth. The other surface of the sheet which has not been contacted with a cooled surface becomes roughened because of the crystallization of the resin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.