Annealed thin walled polymer articles and method to anneal
US4696857A · kind A · utility
14Cited by
8References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Dec 13, 1985 |
| Grant date | Sep 29, 1987 |
| Priority date | — |
| Expiry date | Dec 13, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31725
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The permeation resistance to gases and vapors of polymeric articles including thin walled articles such as films and bottles can be increased by annealing the film. A preferred embodiment is one where the preferred polymer is polycaprolactam or high density polyethylene. There is from 1 to 50 percent of a platelet filler having an average equivalent diameter of from 1 to 8 micrometers, a maximum equivalent diameter of about 25 micrometers, and an average thickness of less than 0.5 micrometers.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.