Monoaxially oriented multilayered packaging material
US5348794A · kind A · utility
41Cited by
1References
6Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 23, 1993 |
| Grant date | Sep 20, 1994 |
| Priority date | — |
| Expiry date | Aug 23, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/3175
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A multilayered packaging material having good piercing resistance and tearability and being excellent in appearance, transparency and so forth, can be produced by orienting multilayered structure which is composed of a polyamide resin layer and other thermoplastic resin layer(s) at a monoaxially stretching ratio of 1.5- to 7.0-fold in such a manner that the thickness of the polyamide resin layer is 3 to 30 .mu.m and the thickness(es) of the other thermoplastic resin layer(s) is (are) at least twice as much as that of the polyamide resin layer.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.