Heat-shrinkable polypropylene film with improved printability
US5169714A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Apr 16, 1991 |
| Grant date | Dec 8, 1992 |
| Priority date | — |
| Expiry date | Apr 16, 2011 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31913
- WIPO fieldTextile and paper machines
- WIPO sectorMechanical engineering
Abstract
A heat-shrinkable polypropylene film adapted to be printed with, particularly, a flexographic ink is disclosed, which comprises a single layer heat-shrinkable film of a polypropylene resin composition containing spherical silicone resin fine particles of 0.2 to 5 microns in average particle size in a content of 0.1 to 0.7% by weight or a multi-layer heat-shrinkable film wherein at least one of the surface layers is such a polypropylene resin composition, with at least one surface of the single layer film or one surface of the surface layer of the multi-layer film having been subjected to corona discharge treatment to such degree that wettability index of the treated surface becomes 36 to 42 dyn/cm.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.