Heat-shrinkable polyester label film and method for preparing thereof
US12400562B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Jul 21, 2022 |
| Grant date | Aug 26, 2025 |
| Priority date | — |
| Expiry date | Jun 6, 2044 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG09F2003/0272
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Disclosed herein are a heat-shrinkable polyester label film and a preparation method thereof. The label film has a shrinkage force not lower than 5.5 N in at least one shrinkage direction after immersing the heat-shrinkable polyester label film in water at 55° C. for 30 seconds, and a heat shrinkage rate of not lower than 50% in the shrinkage direction after immersing the heat-shrinkable polyester label film in water at 55° C. for 240 seconds.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.