Heat shrinkable film composition comprising polyethyleneterephtalate resin and polyester based copolymer, and heat shrinkable film
US11236210B2 · kind B2 · utility
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Key dates
| Filing date | Apr 24, 2020 |
| Grant date | Feb 1, 2022 |
| Priority date | — |
| Expiry date | Apr 24, 2040 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC08L2205/025
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
A composition for forming a heat shrinkable film includes a polyethylene terephthalate (PET) resin having an inherent viscosity of 0.50 to 1.2 dl/g, and a polyester based copolymer including a dicarboxylic acid-derived residue including a residue derived from an aromatic dicarboxylic acid and a diol-derived residue including a residue derived from 4-(hydroxymethyl)cyclohexylmethyl 4′-(hydroxymethyl)cyclohexane carboxylate represented by the following Chemical Formula 1 and a residue derived from 4,4-(oxybis(methylene)bis)cyclohexane methanol represented by the following Chemical Formula 2.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.