Polymerisation is the first basic step in plastics production. Depending on the monomers, it can be carried out in bulk, in a solution, or in an emulsion. If monomer solutions are introduced into the reactor, they are first filtered to separate impurities. Filtration is also used after polymerization to recover monomer residues from polymer solutions/suspensions and to return them to the polymerization reactor. Thermoplastics are an important class of plastic raw materials, like polyamide (PA), polymethyl methaycrylate, polycarbonate, or polyether ether ketone (PEEK). After polymerisation, these materials are either directly granulated for further processing elsewhere, or they are directly melted and processed by extrusion or injection moulding. Our screen changers and melt filter systems are used in this stage.
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Polymers Industry Services
John Crane services can help extend the life of polymer applications and increase production by limiting unplanned downtime and identifying opportunities for improvement:
Polymers 产品
Showing 1–4 of 4 products
Filter Candles / Cartridges

Seebach filter candles and filter cartridges are cylindrical filter elements, which are produced flat or pleated (for the enlargement of the filter surface). Suitable connection…
Leaf Discs

Seebach leaf discs are flat, with sealed edges, single or multilayer packages of filter media. These are used essentially as “screens” in a line, e.g…
Filter Discs

Seebach filter discs are flat filter elements where the filtrate flows through a filter medium at the top and bottom in a base carrier and…
Melt Filters

Seebach melt filters are especially large area filters designed for the processing of plastic melts. They are used for high pressures and high temperatures to…
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