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Title: 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:
 [1];  [1];  [2];  [3]
  1. (Oak Ridge, TN)
  2. (Clinton, TN)
  3. (Knoxville, TN)
Issue Date:
Research Org.:
LOCKHEED MARTIN ENRGY SYST INC
OSTI Identifier:
871541
Patent Number(s):
5750882
Assignee:
Lockheed Martin Energy Research Corporation (Oak Ridge, TN) ORNL
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 = {1998},
month = {1}
}

Patent:

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