In-line mixer for modified bitumen SILVERSON MACHINES

Silverson offers a range of High Shear In-Line mixers developed for the disintegration & solubilisation of polymers into bitumen for the production of modified bitumens. The cylindrical body walls are jacketed for oil heating, ensuring that the product cannot cool & solidify inside machines.

Because processing products that solidify when cold requires thorough heat saturation before start-up, the machines ensure heat reaches all areas where residue accumulates.

Sealing is by means of a graphite/carbon fibre gland packing, designed for operation on bitumens. Standard mechanical shaft seals are available according to the application. Like all Silverson units, interchangeable stators can adapt the machine for varying processes.

Modified bitumen production Polymers & rubbers such as SBS, APP, PVC, EVA & Butyl are blended with bitumen primarily used in the production of road surfaces & roofing felts. The polymers modify bitumen to improve its physical stability, flexibility & resistance to extreme temperatures.

Some polymers such as SBS are more difficult to dissolve/disperse & require high shear to achieve a satisfactory mixing time. Silverson Jacketed In-Line mixers attain this. The bitumen/polymer mix is recycled through the Silverson In-Line mixer where the high shear rotor/stator workhead rapidly disintegrates the polymer pieces. This high shear action exposes constantly increasing areas of fresh polymer to the surrounding bitumen, reducing the process time.

Typical applications: Polymer modified bitumen (production of modified road bitumen & roofing felts), Bitumen emulsions, Underseals & waterproofing compounds, Bitumen cable insulation

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