EN
ZHTest Method: SATRA TM172
Water vapour permeability
May 1993
SCOPE
This method is intended to determine the amount of water vapour a material will transmit through its structure in a specified time. The method is mainly applicable to leathers and textiles used in footwear uppers and clothing where it gives a measure of the ability to remove perspiration from the surface of the wearer’s skin.
PRINCIPLE
A circular test specimen is clamped across the open end of a test pot containing a moisture absorbing desiccant. Air of specified humidity and temperature is blown over the test specimen at a set velocity. The air within the pot is circulated by moving the pot which agitates the desiccant. After a measured time the mass of water vapour transmitted through the test specimen is determined and the water vapour permeability of the material calculated.
REFERENCES
This Test Method does not reference any additional Standards or Test Methods.
HISTORY
First issued May 1993.
AVAILABILITY
This test method is available to members and non-members.
PRICE (ex. VAT)
This price is for a printed copy of the Test Method.
- Members: £75
- Non-members: £215