... -7126 ; GB/T 19789-2005, Function:To test package oxygen transmission rate. Application :* Filmsrigid films, shrik films, stretch films, ... thermal insulation materials, e.g. PP, PVC, PVDC, and nylon*Packagespaper, plastics, rubber, paper, paper-plastic composite, glass, ... reliable data;3, Two calibration methods of standard gas calibration and standard film calibration, 4, Versatile functions such as ...