Measuring and testing – With fluid pressure – Porosity or permeability
Patent
1997-04-04
1998-05-12
Williams, Hezron E.
Measuring and testing
With fluid pressure
Porosity or permeability
428 69, G01N 1508
Patent
active
057508828
ABSTRACT:
Method and apparatus for measuring the permeability of polymer film materials such as used in super-insulation powder-filled evacuated panels (PEPs) reduce the time required for testing from several years to weeks or months. The method involves substitution of a solid non-outgassing body having a free volume of between 0% and 25% of its total volume for the usual powder in the PEP to control the free volume of the "body-filled panel". Pressure versus time data for the test piece permit extrapolation to obtain long term performance of the candidate materials.
REFERENCES:
patent: 4213327 (1980-07-01), Prescott et al.
patent: 4668551 (1987-05-01), Kawasaki et al.
patent: 5157960 (1992-10-01), Brehm et al.
patent: 5513515 (1996-05-01), Mayer
patent: 5591898 (1997-01-01), Mayer
Kollie Thomas G.
Ludtka Gerard M.
Walton David G.
Watkin David C.
Davis J. Kenneth
Lockheed Martin Energy Research Corporation
Politzer Jay L.
Williams Hezron E.
LandOfFree
Gas permeability measurements for film envelope materials does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Gas permeability measurements for film envelope materials, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Gas permeability measurements for film envelope materials will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-981906