Patent ID: 6814991
Filing Date: 2004-11-09
Classification: B65D,Y02W

Abstract:
A packaging container which is a gas-impermeable container having at least one vent hole sealed by an adhesive hole-sealing sheet, characterized in that the hole-sealing sheet is formed by providing, on a back surface of a gas-impermeable sheet base material whose bending strength (S) represented by the following formula (A) is no less than 0.20 m3/N, a pressure sensitive adhesive layer whose vertical peeling strength at 40Â° C., with respect to a surface of the container in which the at least one vent hole is formed, is in the range of 0.3-2 N/cm-S=L/W (m3/N)â€ƒâ€ƒ(A) wherein L: Critical length measured by a Clark degree testing machine (m)W: Weight per 1 m2 of the sheet base material (N/m2).