Polyester vessel for drink and process for preparation thereof
US5250335A · kind A · utility
11Cited by
3References
1Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 22, 1990 |
| Grant date | Oct 5, 1993 |
| Priority date | — |
| Expiry date | Jun 22, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
In preparing a draw-blow-formed polyester vessel, the inner surface and outer surface temperatures of a starting preform are adjusted at specific levels at the preliminary heating step, and the drawing speed in the circumferential direction is adjusted at a level of at least 350%/sec and a specific relation is established between the area draw ratios on the inner and outer surface sides at the draw-blowing step. A polyester vessel having a reduced shrinkage with time and a high pressure-resistant strength is obtained according to this process.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.