Fire resistance of polyethylene is realized by magnesium hydroxide which is distinguished from halogenated fire-proofing agents
by its lower cost and its non toxicity. Magnesium hydroxide decomposed by an endothermic reaction with liberation of water,
contributing to fire proofing. The sample used (Kisuma 5A-N*) is constituted from a powder (0.6–0.8 micrometre) its surface is treated by plastic material in order to ameliorate its
We studied the thermal decomposition by DTA and TG, of mixtures constituted by polyethylene and magnesium hydroxide. A sudden
decomposition began at 385°C for pure polyethylene and decomposition took place at 429°C for the mixture polyethylene-Kisuma
(50–50). Incorporation of magnesium hydroxide in polyethylene increases fire resistance.