Measuring and testing – Moisture content or absorption characteristic of material
Patent
1985-04-12
1986-04-15
Myracle, Jerry W.
Measuring and testing
Moisture content or absorption characteristic of material
73 38, G01N 502
Patent
active
045819211
ABSTRACT:
A test cell comprises a first enclosure which is closed at one end and open at the other. There are means located near the closed end for supplying conditioned air to the first enclosure and an aperture in the bottom wall of the enclosure near its open end. A second enclosure is secured to the lower surface of the first enclosure so that the interiors of the two enclosures are in fluid communication. A porous plate is mounted within the second enclosure to provide a fluid reservoir below it and a lead space above it. There are means associated with the second enclosure for conducting a test liquid to the interior thereof. An apertured sample holder may be used to hold the test specimen in place during use. The first enclosure is preferably divided into first and second compartments by a slotted divider. The test cell may optionally include a baffle means near its closed end to reduce eddying of the air and to provide a uniform air flow pattern across the test specimen. The test cell of the present invention may be used in conjunction with the apparatus described in U.S. Pat. No. 4,357,827 to measure moisture vapor transmission characteristics of a test specimen.
REFERENCES:
patent: 3548634 (1970-12-01), Roy
patent: 3572090 (1971-03-01), Graham et al.
patent: 3886057 (1975-05-01), Bredweg
patent: 4357827 (1982-11-01), McConnell
Poitberg et al., Method for Determining Vapor Permeability of Films & Thin Sheets from Polymer Materials; Ind. Lab. (USA), vol. 44, No. 1, 1-1978.
Farrington Allan P.
Gillespie Ronald J.
Johnson & Johnson
Myracle Jerry W.
Schuler Lawrence D.
Williams Hezron E.
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