Method for injection molding polyethylene terephthalate
US5597525A · kind A · utility
16Cited by
7References
11Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 2, 1994 |
| Grant date | Jan 28, 1997 |
| Priority date | — |
| Expiry date | May 2, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C2045/605
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A method for injection molding polyethylene terephthalate by employing a vent type injection unit as means for omitting preliminary drying the resin, wherein the unit does not develop a poor screw biting, and even when the molding material is an undried uncrystallized or crystallized PET, can feed a certain amount of the material at all times to injection mold a desired transparent molded form such as a preform, and use the preform to produce a thin-wall container at a low cost.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.