Packaging container, packaged food and packaged feed

Abstract

The present invention provides an economical packaging container, an economical packaged food and packaged feed. Specifically, the packaging container is produced by: forming at least one vent hole in a gas-impermeable container; preparing a hole-sealing sheet 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 40° 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; and sealing each vent hole by the hole-sealing sheet. The packaged food and packaged feed are obtained by airtightly enclosing food, feed or the like in such a packaging container. S=L/W(m3/N)  (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).

Dependencies are inferred from the claim text.