info@gbtest.cn
en
ru
es
ar
Test principle
Desiccant inside the specimen cup (weight gain method) or place water (weight loss method); seal the specimen cup with the specimen and place it inside the test chamber; control the temperature, humidity and wind speed of the test chamber; the difference of humidity inside and outside the specimen cup, drive the water vapor to penetrate the specimen, the mass of the specimen cup increases or decreases; weigh the mass of the specimen cup at regular intervals and calculate the water vapor transmission amount of the specimen and other performance parameters.
Standard
ASTM E96、GB/T 1037、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 |
0.0001 g/(m2·24h) |
|
Test station |
6 Pieces |
|
Balance range |
210 g |
|
Balance indexing |
0.01 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 |
