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 |
0.05~10,000 g/(m²・24h) |
Test precision |
Resolution: 0.0001 g/(m²・24h) |
Test station |
12 Pieces |
Balance range |
220 g |
Balance indexing |
0.1 mg (optional 0.01 mg) |
Temperature range |
10~50℃±0.1℃ |
Humidity range |
(5~90) % 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 MP |
Connection size |
Φ6 mm Polyurethane tube |