Patent ID: 7713602
Filing Date: 2010-05-11
Classification: B32B,B65D,Y10T

Abstract:
1. A packaging material comprising: a layer structure having a sealant positioned on an internal side, and a base material film positioned on an external side; a light-blocking printed layer positioned between the sealant and the base material film in a bag being formed; and an odor ingredient barrier layer provided between the light-blocking printed layer and the sealant, wherein the light-blocking printed layer includes a white-colored printed layer printed by a white-colored ink and a sepia printed layer printed by a sepia ink on the white-colored layer, and a color of the sepia printed layer has a color hue of 5R to 10R, a lightness of 5 to 7, and a chroma of 0 to 3 in the Munsell color system, a light permeability of the packaging material is 10% or less at wavelengths of 300 to 800 nm, the odor ingredient barrier layer is configured to have impermeability or block against odor ingredients, caused by pigments and binders in the white-colored ink and the sepia ink of the light-blocking printed layer, to an internal side of the bag, and an entire bottom surface of the odor ingredient barrier layer is in direct contact with an entire upper surface of the sealant.