Injection blow molding pet products
US4356142A · kind A · utility
15Cited by
1References
3Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 27, 1980 |
| Grant date | Oct 26, 1982 |
| Priority date | — |
| Expiry date | Aug 27, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/253
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Method for injection blow molding transparent hollow objects from a polyethylene terephthalate melt comprises molding from a melt at 530.degree.-575.degree. F. into a parison, quickly and relatively uniformly cooled by parison mold elements, at 75.degree.-150.degree. F., to a temperature above the glass transition temperature of the melt. The parison is then immediately blown and cooled to temperature below the softening point of the melt, all in a manner to avoid crystallization and to produce a hollow PET object, typically a clear bottle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.