Method for measuring moisture vapor transmission rate in wearing

Measuring and testing – Moisture content or absorption characteristic of material – By desiccation or extraction

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2DIG7, 73 38, 177 2514, G01M 326

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active

049189816

ABSTRACT:
A method and apparatus for testing wearing apparel that defines an enclosure for moisture vapor transmission. Thin, flexible, waterproof liners which have a high permeability to moisture vapor are inserted into the interior of the apparel and filled with water. The water may be heated to simulate body temperatures and to produce higher concentrations of moisture vapor inside the apparel article. The amount of moisture transferred to the external environment of the apparel article, as well as the amount of moisture absorbed and condensed in the apparel article itself, can be measured by the weight differences which occur over a test period. The method is non-destructive and suitable for quality control, as well as for new product design.

REFERENCES:
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patent: 3116629 (1964-01-01), Neil
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patent: 4344999 (1982-08-01), Gohlke
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ASTM E 96-80, Standard Text Method for Water Vapor Transmission of Materials, approved Oct. 31, 1980, originally E 96-53t and last edition t96-66 (1972), (pp. 795-804).

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