DETECTION METHOD OF DEFORMATION OF PACKAGING BAG

摘要

PROBLEM TO BE SOLVED: To provide a detection method of deformation of a packaging bag capable of detecting highly accurately without visual inspection, temporal deformation or breakage of the packaging bag caused by a heating test, a transportation test or the like.SOLUTION: Temporal deformation of a packaging bag 1 including a sealed space is detected by a change of an electric resistance measured by a strain gauge 5 mounted on the surface of the packaging bag 1.