Label for in-mold forming and resin container with the label

摘要

A label for in-mold forming which comprises a thermoplastic resin film base layer (I), a heat-sealable resin layer (II), and an antistatic layer (III), wherein the heat-sealable resin layer (II) comprises a heat-sealable resin including a copolymer of propylene and α-olefin having 4-20 carbon atoms and has a degree of non-crystallinity of 60-90% as determined with a differential scanning calorimeter (DSC) at temperatures less than 90° C., the antistatic layer (III) comprises an antistatic agent in an amount of 0.001 to 1 g per unit area (m2) and the surface of the layer has a wettability index (JIS-K-6768) of 32-54 mN/m, and the label has a porosity higher than 10% and not higher than 70% and has an opacity (JIS-P-8138) higher than 20% and not higher than 100%; and a labeled container with the label.

主权项

1. A label for in-mold forming which comprises a thermoplastic resin film base layer (I), a heat-sealable resin layer (II), and an antistatic layer (III), wherein
the heat-sealable resin layer (II) comprises a heat-sealable resin including a copolymer of propylene and butene-1, the heat-sealable resin having a degree of non-crystallinity of 60 to 90% as determined with a differential scanning calorimeter (DSC) at temperatures less than 90° C., wherein the content of the butene-1 in the propylene/butene-1 copolymer is 11.5 to 25 mol %, the antistatic layer (III) comprises an antistatic agent in an amount of 0.001 to 1 g per unit area (m2) and the surface of the layer has a wettability index (JIS-K-6768) of 32 to 54 mN/m, and the label has a porosity higher than 10% and not higher than 70% and has an opacity (JIS-P-8138) higher than 20% and not higher than 100%, wherein the degree of non-crystallinity below 90° C. (%)=100−100×(quantity of heat of fusion at temperatures of 90° C. and higher)/(quantity of heat of fusion in 100% crystalline state).