Heat shrinkable polyester film
AssigneeToyo Boseki Kabushiki Kaisha
InventorsHideki Ito, Masakazu Iwasaki
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Abstract
Disclosed is a heat shrinkable polyester multilayer film having excellent transparency, gloss and workability, which can be produced easily. Specifically disclosed is a heat shrinkable polyester film having a haze value of not more than 2%, a glossiness at a measurement angle of 45° of not less than 200% in at least one side of the film, and a dynamic coefficient friction between one side of the film and the other side of the film of not more than 1.5. The heat shrinkable polyester film also has a shrinkage in the main shrinking direction of not less than 50% when immersed in hot water of 95° C. for 10 seconds and a surface resistivity of not more than 13 log Ω at a relative humidity of 65%.
Claims5
A heat shrinkable polyester laminated film comprising (a) a base film of a polyester resin and (b) a surface layer formed on at least one face of the base film, wherein the surface layer contains (i) colloidal silica with a particle diameter of 1 nm or more and 300 nm or less and (ii) 0.001 to 0.5 g/m2 of an anionic antistatic agent containing an alkyl group having 10 to 20 carbon atoms, and wherein the heat shrinkable polyester film has a haze value of 2% or less, a glossiness of 200% or more at a measurement angle of 45° for at least one face, a dynamic friction coefficient between one face and the other face of 1.5 or less, a shrinkage ratio of 50% or more in the main shrinkage direction when the film is immersed in hot water at 95° C. for 10 seconds, and a surface resistivity of 13 log Ω or less at a relative humidity of 65%.
Dependencies are inferred from the claim text.