water vapor transmission


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Related to water vapor transmission: water vapor permeability, Moisture vapor transmission rate

water vapor transmission (WVT)

The rate of water vapor flow, under steady specified conditions, through a unit area of material between the two parallel surfaces (and normal to these surfaces).
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References in periodicals archive ?
[14] America Society for Testing Materials, Standard Test Methods for Water Vapor Transmission Rate of Materials (E96), America Society for Testing Materials, Washington, DC, USA, 1995.
As per ASTM method D 1653-93 the wet cup method was used to determine the water vapor transmission and permeance of pigmented coatings.
Addition of 10% of glass flake in chloroprene rubber gave a ten-fold reduction in water vapor transmission rate.
ASTM Standard E96, Test Methods for Water Vapor Transmission of Materials, prescribes two specific cases of this procedure--a dry cup method that gives the permeance or permeability at a mean RH of 25% and a wet cup method that gives the permeance or permeability at a mean RH of 75%.
This paper exhibited approximately the same water vapor transmission rate and grease resistance as the paper made from high freeness 100% sulfite pulp.
The water vapor transmission rate was measured using a Mocon Permatran-W Twin at 23[degrees]C and 100% relative humidity, according to ASTM F 1249-90.
There was significant interaction between the chitosan concentration and molecular weight, affecting the water vapor transmission rate.
We have had a huge reduction in water vapor transmission to the inside with the unfortunate trend to plastic vapor barriers, vinyl wall coverings and foil-faced fiberglass batts.
T 465 sp-01 "Static creasing of paper for water vapor transmission tests" (November 1, 2005)
LYSSY water vapor transmission testers are used to assess the quality of nonwovens, films, blister packaging, metallized foils, impermeable fabrics, PUR-coated fabrics for nursing and surgical and hygienic membranes.