Degradable container
US5409751A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 17, 1993 |
| Grant date | Apr 25, 1995 |
| Priority date | — |
| Expiry date | Mar 17, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A degradable container which is excellent in transparency and impact strength and can be decomposed into nontoxic water and carbon dioxide in the natural environment within a relatively short period can be obtained by using the process for molding a container of an arbitrary shape from a thermoplastic composition having polylactic acid of lactic acids or a copolymer of lactic acids and other hydroxycarboxylic acids as a main component, preforming the composition and thereafter molding the container in a temperature range from Tg to Tg+60.degree. C. on the basis of the glass transition temperature Tg of the thermoplastic polymer composition and under the condition of a draw ratio of 6 times or less.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.