99.60 Withdrawal effective Aug 2, 2017
CEN/TC 249 Plastics
83.080.01 Plastics in general
ISO 22007-4:2008 specifies a method for the determination of the thermal diffusivity of a thin solid disc of plastics in the thickness direction by the laser flash method. This method is based upon the measurement of the temperature rise at the rear face of the thin-disc specimen produced by a short energy pulse on the front face.
The method can be used for homogeneous solid plastics as well as composites having an isotropic or orthotropic structure. In general, it covers materials having a thermal diffusivity, α, in the range 1 x 10-7 m2s-1 < α < 1 x 10-4 m2s-1. Measurements can be carried out in gaseous and vacuum environments over a temperature range from -100 °C to +400 °C.
For inhomogeneous specimens, the measured values may be specimen thickness dependent.
EN ISO 22007-4:2012
99.60 Withdrawal effective
Aug 2, 2017
EN ISO 22007-4:2017