Heat-shrinkable films
AssigneeFuji Seal International, Inc.
InventorHideaki Umeda
Life of this patent
Estimating the term…
Abstract
A heat-shrinkable film includes outer layers containing a polyester resin, and at least one inner layer being arranged between the outer layers and containing an olefinic resin including at least one ethylene-propylene-butene terpolymer. The film has an interlayer bonding strength between the inner layer and the outer layer of 3.0 N/15-mm or more. The inner layer may contain the ethylene-propylene-butene terpolymer in an amount of 45 percent by weight or more based on the total weight of the inner layer. The heat-shrinkable film is excellent in strength, abrasion resistance, solvent resistance, dimensional stability, and optical transparency, exhibits high shrinkability and high flexibility as a result of heating, and thereby yields beautiful finish after shrinkage. The heat-shrinkable film can be suitably recycled after use.
Claims2
A heat-shrinkable film comprising:
- outer layers comprising a polyester resin;
- and
- at least one inner layer being arranged between the outer layers and comprising an olefinic resin containing 45 percent by weight or more of at least one ethylene-propylene-butene terpolymer based on the total weight of the inner layer,
- wherein the film has an interlayer bonding strength between the inner layer and the outer layer of 3.0 N/15-mm or more.
Dependencies are inferred from the claim text.