Method for producing transparent plastic article
US4983335A · kind A · utility
90Cited by
8References
3Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 29, 1988 |
| Grant date | Jan 8, 1991 |
| Priority date | — |
| Expiry date | Dec 29, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29L2011/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A transparent plastic article with less internal strain is produced by successively polymerizing a monomer part by part with forming a gel state part between the already polymerized part and the unpolymerized part, or by polymerizing a monomer by means of a mold which can follow cure shrinkage of the monomer in order to decrease cure shrinkage. The article produced is particularly suitable for optical applications such as an optical disc, a lens and a prism.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.