Gas permeability measurements for film envelope materials
Patent
·
OSTI ID:644411
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. 4 figs.
- Research Organization:
- Lockheed Martin Energy Syst Inc
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC05-84OR21400
- Assignee:
- Lockheed Martin Energy Research Corp., Oak Ridge, TN (United States)
- Patent Number(s):
- US 5,750,882/A/
- Application Number:
- PAN: 8-832,824
- OSTI ID:
- 644411
- Country of Publication:
- United States
- Language:
- English
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