AS 2498.7-1993

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

Specifies test methods for rigid cellular plastics.

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 testspecimen preparation by cutting. The results given by this Method can be used for comparative purposes only.

First published as AS 2498.7-1981.
Second edition 1993.