| http://www.w3.org/ns/prov#value | - If, however, the blowing agent is a liquid which vaporises on heating, the conditions under which the gas is liberated Will depend on both the temperature of the foamable composition and the pressure to which it is subjected; in this situation the temperature of the composition as it leaves the nozzle should be sufficiently high that, when a constant volume mould cavity is used, the gas will be fo
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