Gas Permeability

The measurement of the permeability of rubber to gases is important in the evaluation of compounds for products such as inner tubes, tubeless-tyre liners, hoses, balloons and other gas containers, seals and diaphragms.

Smithers Rapra are able to determine the permeability of vulcanised and thermoplastic rubber to Oxygen, Carbon Dioxide and Methane gas routinely to BS ISO 2782. Permeability assessment using a number of other gases is possible - please contact us for further details.

The determinations are made using the cavity of a test cell which is divided by a disc test piece into a high-pressure and low-pressure side. The high-pressure side is connected to a constant-pressure test gas reservoir. The gas permeates into the low-pressure which is connected to a capillary tube which measures volume change caused by the permeation of the gas.

Sample Preparation

The presence of our extensive sample preparation which includes the thickness reduction of rubbers by slitting/buffing ensure we are able to test a wide variety of materials and product forms. 

Please contact us to discuss your needs, for more information or to request a quote.