PARTIALLY UNSEALABLE LID MATERIAL

摘要

PROBLEM TO BE SOLVED: To form a partial opening simply and advantageously even in cost by adjusting an adhesive force of an peelable layer. SOLUTION: In a lid material 1 wherein an outer layer material 3 is laminated on a base material 2 having a heat seal layer 2a with the aid of an easily peelable layer 4, continuous notches 7, 9 penetrating through the base material 2 are respectively provided at portions dividing a base part of a tab 6 and a partial opening, and continuously penetrating notches 10 extending over the rear end of the partial opening from both ends of the base part of the tab 6 are provided in the outer layer material 3 on both sides of the partial opening.