... seal strength , heat sealing speed and pressure tec.Application :* Filmsrigid films, shrik films, stretch films, plastic films, plastic composite films, paper-plastic ... g. PP, PVC, PVDC, and nylon*Packagespaper, plastics, rubber, paper, paper-plastic composite, glass, and metal packages, eg: bottles, containers,Techinical ... Laboratory: Our team: Heat Sealing Tester(ASTM) for plastic heat seal testing