Heat-shrinkable film
The present invention provides a heat shrinkable film that has excellent heat shrinkability while preventing contamination in subsequent processes such as printing. The present invention relates to a heat shrinkable film that at least includes a front layer and/or a back layer. The front layer and the back layer each contain a cyclic olefin resin in an amount of 55 to 99.99% by weight and organic fine particles in an amount of 0.01 to 0.3% by weight.
1. A heat shrinkable film comprising:
a front layer; a back layer; and an interlayer, laminated together,
wherein the front layer and the back layer comprise a cyclic olefin resin in an amount from 55 to 74.9% by weight, organic fine particles in an amount from 0.03 to 0.2% by weight, and an ethylene resin in an amount from 0.1 to 25% by weight,
the organic fine particles are crosslinked-organic resin fine particles and have an average particle size in a range from 1 to 5 μm, and
the crosslinked-organic resin fine particles are at least one particles selected from the group consisting of crosslinked acryl resin fine particles and crosslinked styrene resin fine particles,
the interlayer comprises a propylene resin in an amount from 51 to 99% by weight and a cyclic olefin resin in an amount from 1 to 49% by weight, and
the propylene resin comprises a propylene-a-olefin random copolymer.
2. The heat shrinkable film according to claim 1 ,
wherein the interlayer further comprises a hydrocarbon resin.
3. The heat shrinkable film according to claim 1 ,
wherein the interlayer further comprises an olefin elastomer in an amount from 1 to 20% by weight.