Test method for determination of moisture vapor transmission rat

Details Test method for determination of moisture vapor transmission rat Test method for determination of moisture vapor transmission rat

1988-10-03

1989-09-05

Levy, Stewart J.

Measuring and testing

With fluid pressure

Porosity or permeability

G01N 502

Patent

active

048627305

ABSTRACT:
A method is described for determining the degree of moisture vapor transmission of certain materials which comprises taking a weighed test cup containing a saturated salt solution sealed inside the cup with a waterproof, moisture vapor permeable membrane, and inserting it over a sample that is supported on a waterproof, moisture vapor permeable membrane over a controlled temperature waterbath. After a set time, the cup is reweighed and the water pick up recorded.

REFERENCES:
patent: 2012762 (1935-08-01), Kern
patent: 2400481 (1946-05-01), Brabender
patent: 2904996 (1959-09-01), Lamb et al.
patent: 3286509 (1966-11-01), Gluckman et al.
patent: 4532316 (1985-07-01), Henn
patent: 4581921 (1986-04-01), Gillespie et al.
patent: 4741202 (1988-05-01), Gillespie et al.
Amdur, E. J., Test Results from Fast WVT Unit. In Modern Packaging. Dec. 1967.

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