Heat-shrinkable polyester films and labels using the same
US6663928B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 25, 2002 |
| Grant date | Dec 16, 2003 |
| Priority date | — |
| Expiry date | Jan 25, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/31786
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Heat-shrinkable polyester films, each having a heat shrinkability of 5-60% after treatment in hot water at 70° C. for 5 seconds and 65-95% after treatment in hot water at 85° C. for 5 seconds, both in the main shrinkage direction of the film, and 10% or lower after treatment in hot water at 85° C. for 5 seconds in a direction perpendicular to the main shrinkage direction of the film, the heat-shrinkage stress in the main shrinkage direction of the film being 13 MPa or smaller, and the film haze being lower than 10%, exhibits excellent shrinkage finish in appearance with only rare occurrence of wrinkles, shrinkage spots and strains by shrinkage; 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.