FIELD: chemistry.
SUBSTANCE: expandable granules of styrene polymer are obtained through direct saturation of molten polymer with a foaming agent in a system of static mixers. The method involves feeding an additive into the melt and granulation of the obtained melt using a submersed granulator. The additive used is oxidised or non-oxidised polyethylene fibre with drop point higher than 70°C in amount of 0.1-2.5 wt % per weight of the granules of the expandable styrene polymer. An additional additive used can be antipyrene hexabromocyclododecane.
EFFECT: improved intermixing of components of the molten polymer, activation of flow of the molten polymer, saving electrical power, improved internal structure of the expanded article using one additive.
2 cl, 1 dwg, 1 tbl, 9 ex
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