Method for producing multilayer stretch-molded article
US7998385B2 · kind B2 · utility
9Cited by
3References
7Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Sep 29, 2004 |
| Grant date | Aug 16, 2011 |
| Priority date | — |
| Expiry date | Aug 24, 2027 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB32B2553/00
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A transparent multilayer stretched product is produced through a process including: providing a resin laminate including at least on layer of polyglycolic acid resin, heat-forming and cooling the resin laminate, reheating the resin laminate until the polyglycolic acid resin is crystallized to be opaque and then stretching the reheated resin laminate. The thus-obtained multilayer stretched product is excellent in gas-barrier property in addition to the transparency and is suitable as a packaging material or container.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.