A new series of pumps, branded GPX, are said to help processors avoid the random peaks in melt temperature which may be caused either by the heating control system or by frictional heat. Key to the manufacture of these was to optimize the fluid heating system, leading to minimal frictional heat, and thus prevent an increase in the melt temperature.
The manufacturer of the GPX pumps, Kreyenborg, says they are aimed at processors of thermally sensitive products such as thermoplastic elastomers or thermoplastic olefin elastomers (TPEs and TPOs, respectively). In plastics extrusion, gear pumps meter the melt and also the melt pressure. Typically the pumps are electrically heated by means of cartridge heaters or band heaters....