Air permeance /porosity

The permeability of paper to air affects how the material behaves during many conversion and application processes. It can be measured using a range of air leakage instruments of different types:

The Bendtsen air permeance tester measures the flow of air through a fixed area in ml/min.

The Gurley tester measures the time for 100ml of air to flow through a set area.

Pira measure the porosity and air permeance of a range of porous materials including tissue, paper and non-woven materials for packaging applications such as filters, labels and packaging materials for medical devices.

Pira's UKAS, ISO 17025 accredited testing is performed to British standard, BS 6538: Part 2 (Bendtsen) and BS 6538 Part 3 (Gurley), and International standards, ISO 5636 Part 3 (Bendtsen) and ISO 5636 Part 5 (Gurley).

Contact:

Doug Leatherdale
email: doug.leatherdale@pira-international.com
Tel: +44 1372 80 2108