Table of Contents

1 -  AS 2498.7-1993 METHODS OF TESTING RIGID CELLULAR PLASTICS - DETERMINATION OF VOLUME PERCENTAGE OF OPEN AND CLOSED CELLS
1 -  METHOD
1 -  1 SCOPE
1 -  2 REFERENCED DOCUMENTS
1 -  3 DEFINITIONS
1 -  3.1 Geometrical surface
1 -  3.2 Geometrical volume
1 -  3.3 Geometrical surface to volume ratio
1 -  3.4 Impenetrable volume
1 -  3.5 Apparent volume percentage of open cells
1 -  3.6 Corrected volume percentage of open cells
2 -  3.7 Corrected volume percentage of closed cells
2 -  4 PRINCIPLE
2 -  5 APPARATUS
2 -  5.1 P Method
4 -  5.2 V Method
4 -  6 TEST SPECIMENS
4 -  6.1 Dimensions
4 -  6.2 Preparation
4 -  6.3 Number
6 -  7 CONDITIONING AND TESTING ATMOSPHERES
6 -  8 PROCEDURE
6 -  8.1 Determination of geometrical surface (S) and geometrical volume (Vg)oftest specimen
6 -  8.2 Determination of impenetrable volume (Vi) by P method
6 -  8.2.1 Principle
6 -  8.2.2 Calibration of the apparatus
8 -  8.2.3 Procedure
9 -  8.2.4 Calculation
9 -  8.3 Determination of the impenetrable volume (Vi) by V method
9 -  8.3.1 Calibration of the apparatus
10 -  8.3.2 Procedure
10 -  8.4 Correction for cells opened by cutting during specimen preparation
13 -  9 CALCULATIONS
13 -  9.1 Apparent volume percentage of open cells
13 -  9.2 Corrected volume percentage of open cells
13 -  9.3 Corrected volume percentage of closed cells
13 -  10 TEST REPORT
14 -  APPENDIX A - NOTES ON PROCEDURE
14 -  A1 STABILITY OF REFERENCE VOLUME
14 -  A2 INFLUENCE OF ATMOSPHERIC PRESSURE
14 -  A3 CHOICE OF THE VALUE OF Pe (P METHOD) OR dVK (V METHOD)
14 -  A4 INFLUENCE OF TEMPERATURE
14 -  A5 INFLUENCE OF HUMIDITY
14 -  A6 INFLUENCE OF GAS OCCLUDED IN TEST SPECIMENS

Abstract

Specifies test methods for rigid cellular plastics.

Scope

This Standard sets out a method for determining the volume percentage of open and closed cells of rigid cellular plastics by measurement; first of the geometrical volume and then of the impenetrable volume of test specimens. This method also permits taking into consideration (for use as a correction) the volume of cells opened during test
specimen preparation by cutting. The results given by this Method can be used for comparative purposes only.

General Product Information

Published
Document Type	Standard
Status	Current
Publisher	Standards Australia
Pages
ISBN
Committee	PL-016
Supersedes	AS 2498.7-1981 DR 92136