For packaging: Heat sealing tester 2) test heat sealing temperature, pressure, speed of plastic film & plastic bag etc Heat Sealing TesterStandards ... test package heating tempeature range, heating seal strength , heat sealing speed and pressure tec.Application :* Filmsrigid films, ... materials, and thermal insulation materials, e.g. PP, PVC, PVDC, and nylon*Packagespaper, plastics, rubber, paper, paper ...