In general, common conveyor belt flame retardants should possess such characteristics , namely, rubber belt itself, the physical and mechanical properties and electrical properties of impact should be small ; thermal stability and have to have a suitable decomposition temperature to ensure that the rubber in the processing of the molding conveyor belt will not be decomposed , and has good compatibility to the mobility is small, the flame retardant conveyor belt in the industrial belt and other products can be maintained over the longer term effect of the flame , should not be used the loss of the period , with good weather resistance, no pollution products , no smell , non-toxic or low toxic , safe operation and other advantages, heavy industry, biomass burning conveyor belt contains three elements are flammable, oxygen and heat, to want to prevent combustion , it is necessary to remove the above three elements , at least one element in the following, we will be able to prevent the combustion flame retardant tape mechanism summarized as follows:
1 ) as a flame retardant or decomposition products thereof carbonization dehydration of the polymer , reducing the combustion flame is generated , and the generation of flammable gas , therefore , when the polymer coking quickly bring it can prevent the combustion flame ;
2 ) As the aqueous compounds decompose violently at high temperature dehydration and absorb large amounts of energy , reducing the ambient temperature , and a large dilution of the inorganic flame combustible polymer to improve the flame resistance, while water vapor is diluted a combustible gas , such as an inorganic flame retardant hydrated zinc boron acid , hydrated alumina to have this feature ;
3 ) a flame retardant rubber band non-volatile decomposition products formed protective film , when the lifting belt phosphide containing heat polyvinylidene finally formed under the action of phosphoric acid , the polymer can form a protective film on the surface prevent its continued burning, boron-containing flame retardants has a similar effect ;
4 ) When used as a phosphorus halide flame retardant transport belt ring , ultimately forming a continuous thermal decomposition vitreous , vitreous covering the surface of the polymer , forming a protective film cut off the oxygen ;
5 ) a halogen-containing flame retardants at elevated temperatures the hydrogen halide formed by the decomposition of the polymer decomposition diluting the combustible gases generated from the combustion becomes difficult ; while a hydrogen halide is also captured object of hydroxyl radicals , and it could be large magnitude lower concentration of chain termination reactions play a flame retardant ;
6 ) high-strength belt flame from the decomposition of non-flammable gases covered by the polymer surface , cut off the supply of oxygen and play retardant effect ;
7) Since the density flame decomposition gas or high boiling liquid to cover the surface of the material cut off the supply of oxygen , plays a flame retardant , the polymer containing halogen or phosphorus, and antimony oxide and halogen , or phosphorus , halogen and antimony oxide exist , it would be something like a flame retardant ;