Compounding Hypalon for tank lining

Hypalon does not break down during mastication in the sense that natural rubber and Neoprene do. These rubbers undergo an irreversible chemical change (i.e., a reduction in molecular weight) when they are worked in the mixing mill. 

Mixed stocks should not be stored in conditions of high humidity. Because moisture absorbed by Hypalon compounds under high humid condition acts as an accelerator 

Division strips, caulking strips and end rings used for fixing filter grids on the Hypalon lined filter drums for sulfamic acid slurries are extruded from Hypalon compounds. The extrusion temperature condition are maintained as follows  

Extrusion of Hypalon tends to be soft when hot. The die correction for the profiles for accommodating shrinkage and swelling of the stock should be done based on a few trials. As soon as the correct profile comes out of the die, it should be thoroughly cooled in a cooling tank with soapy water. 

The curing system based on magnesia would be used to provide resistance against concentrated sulfuric acid and other drying agents. If there is a possibility where the lining is exposed to 30% hydrochloric acid, magnesia should not be used. 

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