Method for manufacturing heat resistant PET containers
US4836971A · kind A · utility
56Cited by
4References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 31, 1986 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Oct 31, 2006 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10S264/908
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A heat resistant container is made from a PET preform by crystallizing its neck (10), heating just its body to the softening temperature of PET, blow molding an intermediate container (21) in a cooled mold (5.degree. to 40.degree. C.) with a larger volume than that of the final container to be obtained, heating the intermediate container to 180.degree.-220.degree. C. for 1 to 15 min, and then molding it a second time to its final dimensions at a temperature of 80.degree.-100.degree. C. for 2 to 6 sec.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.