| 摘要 |
A multi-layer shrink film 10 including a skin layer 13 and a core layer11; the skin layer comprises at least 50% by weight of a cyclic olefin copolymer and the core layer comprises from 5% by weight to 50% by weight of a propylene based elastomer, from 20% by weight to 50% by weight of a propylene based plastomer, from 1% by weight to 20% by weight of a hydrocarbon resin and from 5% by weight to 30% by weight of a cyclic olefin copolymer. The shrink film 10 may comprise a further skin layer 15 such that the core layer 11 is sandwiched between the two skin layers 13, 15. The core layer 11 may further comprise up to 5% by weight of linear low-density polyethylene LDPE. The hydrocarbon resin may be selected from resins based on Rosin, resin acid dimmers, terpene or pretroleum and is preferably a petroleum resin. The skin layers 13 preferrable comprise from 70-100% cyclic olefin copolymer and up to 30% LDPE, the thickness of the skin layers are such that the overall volume of skin layers is 15-35% of the total volume of the shrink film 10. Also included are claims for a shrink sleeve comprising the shrink film 10 and a container comprising the shrink film 10 or the shrink sleeve. |
