<p>This document specifies a method for the determination of the resistance of moulded test specimens of polypropylene and propylene-copolymers to accelerated ageing by heat in the presence of air using a forced draught oven.</p>
<p>The method represents an attempt to estimate the service life of parts fabricated from propylene plastics.</p>
<p>The stability determined by this method is not directly related to the suitability of the material for use when different environmental conditions prevail.</p>
<p>NOTE The specified thermal levels are considered sufficiently severe to cause failure of commercial grades of heat-stable propylene plastics within a reasonable period of time. If desired, lower temperatures can be applied to estimate the performance of propylene plastics with lower heat stabilities.</p>
Registration number (WIID)
70407
Scope
<p>This document specifies a method for the determination of the resistance of moulded test specimens of polypropylene and propylene-copolymers to accelerated ageing by heat in the presence of air using a forced draught oven.</p>
<p>The method represents an attempt to estimate the service life of parts fabricated from propylene plastics.</p>
<p>The stability determined by this method is not directly related to the suitability of the material for use when different environmental conditions prevail.</p>
<p>NOTE The specified thermal levels are considered sufficiently severe to cause failure of commercial grades of heat-stable propylene plastics within a reasonable period of time. If desired, lower temperatures can be applied to estimate the performance of propylene plastics with lower heat stabilities.</p>
