Full Description

This part of ISO 5636 describes a method for measuring the air permeance of paper and board using the measurement principle known as "Gurley". The air pressure within the cylinder varies slightly according to the displacement of the cylinder, but it has been shown that the variation is 1.2% of mean pressure for 100 ml of displacement and 3.3% for the full scale displacement of 350 ml. This part of ISO 5636 specifies the Gurley method of determining the air permeance of paper and board. It is applicable to papers and boards which have air permeances between 0.1 and 100 Pa.s. It is unsuitable for rough surfaced materials, such as creped or corrugated papers, which cannot be securely clamped to avoid leakage.

Product Details

Published: 12/01/1986 Number of Pages: 5