Heat shrinkable laminated packaging material
US4652490A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 27, 1985 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Aug 27, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldSurface technology, coating
- WIPO sectorChemistry
Abstract
A heat shrinkable and heat sealable laminated packaging material comprising a heat shrinkable film which is endowed with a heat shrinkability by biaxial stretching in advance of lamination, such as biaxially stretched polyamide film or biaxially stretched polypropylene film, and a heat shrinkable polyolefin sealant film which is endowed with a heat shrinkability by stretching in advance of lamination, such as biaxially stretched linear low density polyethylene film, the sealant film being laminated on one or both surfaces of the heat shrinkable film. The laminated packaging material imparts a tight appearance to a finish package in heat shrink packaging due to its excellent heat shrinkability.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.