Process for measuring vapor transmission through materials

Details Process for measuring vapor transmission through materials Process for measuring vapor transmission through materials

1997-05-14

1998-11-17

Brock, Michael

Measuring and testing

With fluid pressure

Porosity or permeability

G01N 1508

Patent

active

058378880

ABSTRACT:
A process for measuring the vapor transmission rate characteristics of a test material by first measuring the vapor transmission through a test chamber and sample material and subsequently repeating the measurement with the test material adjacent the sample material. By subtracting the first measured transmission rate reciprocal from the second measured transmission rate reciprocal, a value is determined which is the reciprocal of the vapor transmission rate characteristic of the test material.

REFERENCES:
patent: 3286509 (1966-11-01), Guckman et al.
patent: 5138870 (1992-08-01), Lyssy
Modern Controls, Inc. Technical Bulletin #007--A dated May 12, 1983, "Testing with High RH on the Ox-Tran Systems".
ASTM Journal of Testing and Evaluation, vol. 12, No. 3, dated May 1984, Article "The Sandwich Method--A Proposed Approach to the Measurement of Oxygen Transmission Rate Through Moisture-Sensitive Barrier Films," Rex C. Wood.

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