Patent ID: 7658543
Filing Date: 2010-02-09
Classification: B32B,B65D,Y10T

Abstract:
1. A multi-layered packaging member, comprising: a light shielding layer formed by printing, in a multi-layer layer structure, a white color printed layer that is printed by white color ink and a light shielding printed layer that is printed by a light shielding ink, the light shielding layer having positions intended for heat seal to be laid on and heat sealed with each other for making a packaging bag, wherein one of the heat seal positions is provided with a seal state confirming part, the seal state confirming part being inside of the heat seal position and covering an entire length of the heat seal position and including the white color printed layer and not the light shielding printed layer, a light transmittance of the seal state confirming part being greater than a light transmittance of the other positions intended for heat seal.