Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1991-06-17
1992-08-18
Shoap, Allan N.
Measuring and testing
With fluid pressure
Porosity or permeability
73 2901, 73 76, G01N 1508, G01N 502
Patent
active
051388707
ABSTRACT:
An apparatus for measuring the water vapor permeability of sheet materials such as films, foils, paper and cardboard, under adjustable constant measuring conditions. A lid having an air inlet opening and an outlet opening is attached on a cup containing water in a vapor and airtight manner. A sheet material, its circumferential border sealingly held between the rims of the cup and lid, separates the water in the cup from the lid. An absorption member containing a moisture-absorbent material is in communication with the outlet opening. A blower in communication with the air inlet opening aspirates air through an air dryer and blows the resulting dry air into the sealed cup containing the sheet material, the permeability of which is to be measured.
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Gutierrez Diego F. F.
Shoap Allan N.
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