Gas permeability measurements for film envelope materials
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.
- Inventors:
-
- Oak Ridge, TN
- Clinton, TN
- Knoxville, TN
- Issue Date:
- Research Org.:
- Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
- OSTI Identifier:
- 871541
- Patent Number(s):
- 5750882
- Assignee:
- Lockheed Martin Energy Research Corporation (Oak Ridge, TN)
- Patent Classifications (CPCs):
-
G - PHYSICS G01 - MEASURING G01N - INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y10 - TECHNICAL SUBJECTS COVERED BY FORMER USPC Y10T - TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- DOE Contract Number:
- AC05-84OR21400
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- gas; permeability; measurements; film; envelope; materials; method; apparatus; measuring; polymer; super-insulation; powder-filled; evacuated; panels; peps; reduce; time; required; testing; weeks; months; involves; substitution; solid; non-outgassing; free; volume; 25; total; powder; pep; control; body-filled; panel; pressure; versus; data; piece; permit; extrapolation; obtain; term; performance; candidate; permeability measurements; film materials; total volume; time required; polymer film; method involves; film material; free volume; method involve; gas permeability; powder-filled evacuated; pressure versus; /73/428/
Citation Formats
Ludtka, Gerard M, Kollie, Thomas G, Watkin, David C, and Walton, David G. Gas permeability measurements for film envelope materials. United States: N. p., 1998.
Web.
Ludtka, Gerard M, Kollie, Thomas G, Watkin, David C, & Walton, David G. Gas permeability measurements for film envelope materials. United States.
Ludtka, Gerard M, Kollie, Thomas G, Watkin, David C, and Walton, David G. Thu .
"Gas permeability measurements for film envelope materials". United States. https://www.osti.gov/servlets/purl/871541.
@article{osti_871541,
title = {Gas permeability measurements for film envelope materials},
author = {Ludtka, Gerard M and Kollie, Thomas G and Watkin, David C and Walton, David G},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Thu Jan 01 00:00:00 EST 1998},
month = {Thu Jan 01 00:00:00 EST 1998}
}
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