PACKAGING FILM HAVING IMPACT-RESISTANT CHARACTERISTIC AND HIGH RIGIDITY

摘要

PROBLEM TO BE SOLVED: To provide a packaging material film excellent in impact-resistant performance and rigidity.;SOLUTION: In a packaging material film including a base material layer 1 and at least two seal layers, the base material 1, the first seal layer 2 and the second seal layer 3 are stacked in this order. A concave shape 4 is configured on a surface, which is brought into contact with the second seal layer, of the first seal layer or a surface, which is brought into contact with the first seal layer, of the second seal layer. The first and second seal layers partially include a void 5.;COPYRIGHT: (C)2016,JPO&INPIT