vapor transmission


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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).
References in periodicals archive ?
In contrast, papers or linerboard coated with EcoShield Barrier Coating remain fully recyclable and repulpable while achieving a very low moisture vapor transmission rate (MVTR) comparable to that of polycoated or waxed paper, the company said.
If the addition's ceiling is drywall, you can improve its vapor transmission resistance by making sure that there are no gaps around the perimeter and no cracks in the taping and painting it with B-I-N followed by your choice of finish paint.
The Tri-Sorb tablets are designed for placement into blister headspaces, either singly or in multiples, in lieu of the actual drug product, where they are used to test and verify the moisture vapor transmission rate, or MTVR, of blister packaging according to the USP standard.
At the same time, there's also protection from water vapor transmission while the urethane sealant used between the panels provides superior protection against sidewall water penetration.
If we replace the vertical axis with vapor transmission in permeability, we get pretty much the same shape of curve.
The water vapor transmission rates (WVTRs) and oxygen transmission rates (OTRs) of the films were studied to evaluate barrier properties.
It shows high moisture vapor transmission rate (MVTR) and good biocompatibility based on ISO 10993 testing.
It features a moisture vapor transmission rate (MVTR) that is six times that of other dressings when placed over a wet surface and better than all dressings except gauze when placed over a dry surface.
The patches were prepared by solvent evaporation technique and analyzed for weight variation, thickness, drug content, swelling index, moisture content, moisture uptake, water vapor transmission rate (WVTR) and water vapor permeability (WVP).
Water vapor transmission rate (WVTR) was determined gravimetrically using a modification of ASTM Method E 96 [26].
The upright cup test is used to test microporous hydrophobic coatings and laminates and measures water or perspiration vapor transmission.
Meanwhile films made from thermoplastic polyurethane are tailor-made for use as soft, thin-film protective coverings that control water vapor transmission and are highly flexible, with a matte surface.