Standard: PAPTAC - D.14
AIR RESISTANCE OF PAPER (GURLEY METHOD)
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This test measures the air resistance of papers and paper products by determining the time necessary for a given amount of air at nearly constant pressure to pass through a given area of the test specimen. The commonly used term air porosity, or permeance, of paper is inversely proportional to this measurement. The method is applicable to papers that permit the passage of 100 mL of air in the range from 5 to 1800 s through a test area of 6.45 cm2 under a nominal pressure of 1.22 kPa.
This method is unsuitable for rough-surface papers where significant surface and edge leakage can occur even when the test specimen is securely clamped.
|Organization:||Pulp and Paper Technical Association of Canada, Formerly CPPA|
|Most Recent Revision:||YES|
|Document #||Change Type||Update Date||Revision||Status|
|D.14||Change Type:||Update Date: 1993-08-01||Status: INAC|
|D.14||Change Type:||Update Date: 1993-01-01||Status: INAC|
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