Air permeance can influence how porous materials perform during conversion and in their intended application. Testing can support material characterisation, comparison and performance evaluation for applications including filters, labels and medical device packaging materials.
Smithers offers both Bendtsen and Gurley air permeance testing, enabling materials with different air-flow characteristics to be evaluated.
Bendtsen and Gurley testing
The Bendtsen method measures the rate of airflow through a defined area of material, with results expressed in ml/min.
The Gurley method measures the time required for a specified volume of air to pass through a defined area of material.
Together, these methods can be used to evaluate a range of porous materials and air permeance characteristics.
Standards and accreditation
Smithers' UKAS ISO 17025 accredited testing is performed to:
- BS 6538 Part 2 and ISO 5636 Part 3 – Bendtsen
- BS 6538 Part 3 and ISO 5636 Part 5 – Gurley
Talk to our experts about your material, application and the air permeance properties you need to evaluate.
