This standard specifies the test method for determining the gas transmission rate and gas transmission coefficient of plastic films and sheets by differential pressure method. This standard applies to the determination of air or other test gases.
GB/T 1038-2000 history
2022GB/T 1038.1-2022 Plastics—Film and sheeting—Determination of gas-transmission rate—Part 1:Differential-pressure methods
2000GB/T 1038-2000 Plastics-Film and sheeting-Determination of gas transmission-Differential-pressure method