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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 |
