Lightweight bottles and method for making same
US6060140A · kind A · utility
18Cited by
4References
29Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 17, 1998 |
| Grant date | May 9, 2000 |
| Priority date | — |
| Expiry date | Apr 17, 2018 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/1397
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention discloses a process comprising forming a preform with planar stretch ratios greater than about 14 from a polyester having a natural stretch ratio which is substantially matched to the preform planar stretch ratio at processing conditions; and stretch blow molding said preform to produce a container. Suitable natural stretch ratios include those greater than about 13 at 210.degree. F. The desired natural stretch ratios and desirable final container properties are achieved by balancing the appropriate I.V. and copolymer modification.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.