| developed by Dalian Hede Technologies Corporation specifically for making high quality gas sampling bags. It is composed of total 11 layer films (PET, PA, Aluminum, PE, etc) with thickness 120-140um.It has superb strength and low permeability; meanwhile it possesses excellent chemical inertness and stability. The overall property of DEVEX film exceeds that of PVDC film such as Saran. During lamination, environmental-friendly adhesive is used to eliminate solvent residue such as benzene, acetone, and esters. DEVEX gas sampling bags have a wide range of applications including hydrocarbons, CO,CO2, nitrogen, hydrogen, oxygen, hydrogen sulfide, nitrogen oxides and halogens. But it is not recommended to use for hydrogen sulfide, nitrogen oxides and halogens at ppb level. Co***red to Polyfluoro film bags, DEVEX bags have low price, and can be used in VOCs assessment |
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