| 摘要 |
A moisture permeability measuring method comprising the steps of measuring t he weight of a specimen in constant temperature and humidity room without takin g out the specimen from the constant temperature and humidity room to the atmosphere and without being affected by vibration and objectively evaluatin g the results of the weight measurement by detecting the state of the water vapor permeating a sample and the temperature of stored water; a moisture permeability measuring device, wherein a precision electronic scale (7) is installed on a damping stand (6) set in the constant temperature and humidit y room (P), the weight of the specimen (T) in which the sample (2) is installe d on a measuring cup (1) containing water (W) is measured by the precision electronic scale and the measured results are converted into a moisture permeability, the measuring cup (1) comprising a cup main body (10) and a retaining ring (11), thermocouples (40) immersed in water being installed through the peripheral wall part of the cup main body, and a temperature- humidity sensor (41) being attached to extend to a space (15) between the water surface and the sample.
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