Water Vapor Permeability Tester

Application:

Determine the water vapor permeability (WVP) of shoe uppers. 

 

Principle:

The test piece is fixed over the opening of a jar, which contains a quantity of solid desiccant. This unit is placed in a strong current of air in a conditioned atmosphere.

The air inside the container is constantly agitated by the desiccant, which is kept in movement by the rotation of the jar.

The jar is weighed in order to determine the mass of the moisture that has passed through the test piece and has been absorbed by the desiccant.

 

Test Standard:

ISO 20344, EN 344   

 

Specification:

Specimen size	Φ34mm
Specimen disc rotate  speed	75±5r/min
Bottle neck diameter	Approx. 30mm
Fan incline angle	120°
Fan rotate speed	1400±100r/min
Test station	6 sets
Testing condition	Temperature 0~80℃ Humidity 30~90%RH