Process of making heat-sealable oriented web
US5328653A · kind A · utility
21Cited by
9References
17Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Apr 15, 1993 |
| Grant date | Jul 12, 1994 |
| Priority date | — |
| Expiry date | Apr 15, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31587
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A heat-sealable oriented film or layer of a semi-crystalline thermoplastic polymer. The film has a thin, heat-sealable layer of the same thermoplastic polymer having a different heat-seal temperature, which layer is heat-sealable without requiring fusion of the entire film. There is also provided a method for producing the claimed heat-sealable film.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.