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Test principle
Desiccant (weight gain method) or place water (weight loss method) in the sample cup; seal the sample cup with the sample and place it in the test box; control the temperature, humidity and wind speed of the test box; The difference in humidity drives the water vapor to penetrate the sample, and the mass of the sample cup increases or decreases; the mass of the sample cup is regularly weighed, and the performance parameters such as the water vapor transmission amount of the sample are calculated.
Standard
ASTM E96、GB/T 1037、GB/T 16928、GB/T 17146、GB/T 12704、GB/T 19082、GB/T 21332、ASTM D1653、ISO 2528、TAPPIT464、DIN 53122-1、YBB00092003
Technical parameters
Item
Technical parameters
Test range
film：0.05~10,000 g/(m2·24h) Container：0.0002~30 g/(pkg·24 h)
Test precision
film：0.05 g/(m2·24h)，Container：0.0002 g/(pkg·24 h)
Test station
12 Pieces
Balance range
210 g
Balance indexing
0.1 mg
Temperature range
10~50±0.1 ℃
Humidity range
5%～95%，100% RH
air speed
0.5~2.5 m/s（0.03~0.5 m/s optional）
Sample size
Φ74 mm
Sample thickness
≤3 mm
Test method
weight gain method, weight loss method
Standard test area
33 cm2
Carrier gas specification
Air compressor
Air pressure
≥0.6 MPa
Connection size
Φ6 mm Polyurethane tube
