Paper-plastic laminate sheeting
US5244702A · kind A · utility
Inventors
Key dates
| Filing date | Jan 9, 1992 |
| Grant date | Sep 14, 1993 |
| Priority date | — |
| Expiry date | Jan 9, 2012 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31993
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A paper-plastic laminate sheeting capable of being converted by conventional equipment into envelopes, grocery bags and other dilatable container products that initially are in a flat state and are normally made of paper. The sheeting is composed of a paper facing sheet cold-laminated by means of a water-based adhesive to a reinforcing film of synthetic plastic material, such as polypropylene. The film is oriented to impart exceptional tear and burst strength characteristics to the resultant waterproof product. The product, whose exterior surface is formed by the paper facing sheet, is readily printable. For some applications, a second paper facing sheet is cold-laminated to the other side of the film to produce a three-ply laminate sheeting whose exposed surfaces are readily printable and can accept conventional adhesives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.