Pyrotechnic material

摘要

A pyrotechnic sheet material comprising a substrate layer of an oxidizing material having a layer of oxidizable material on at least a portion of at least one surface thereof, the oxidizing material and the oxidizable material being conjointly capable of reaching together exothermically on ignition, characterised in that at least one of said layers of material has at least one portion which is discontinous so as to expose portions of the interface between the oxidizing material and the oxidizable material through flame-permeable apertures in the said discontinous portion.