Heat-shrinkable polyester films
US6761966B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 4, 2002 |
| Grant date | Jul 13, 2004 |
| Priority date | — |
| Expiry date | Oct 8, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/29
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Heat-shrinkable polyester films, each having a heat shrinkability of 30% or higher after treatment in hot water at 85° C. for 10 seconds in the main shrinkage direction of the film, and 10% or lower after treatment in hot water at 85° C. for 10 seconds in a direction perpendicular to the main shrinkage direction of the film, the resistance to tear propagation in the direction perpendicular to the main shrinkage direction after the film has been shrunk at 10% in the main shrinkage direction of the film being 1500 mN or smaller, exhibit excellent shrinkage finish with only rare occurrence of wrinkles, shrinkage spots and strains by shrinkage and have excellent cut properties along perforations; therefore, these films are suitable for full labels on bottles, particularly for full labels on PET bottles.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.