High and low viscosity
Coating film manufacturers are faced with numerous challenges when tasked with the feeding of the high viscosity adhesives. At Anyone Tape, the adhesive has a viscosity of 3000 cP, akin to honey. However, as part of a cleaning process, the pump is also required to transfer substances such as MEK (methyl ethyl ketone), a colourless organic compound, and toluene, a clear water-insoluble liquid. Added to all this, there must be no bubbles during the adhesive feeding process as these will compromise the integrity of the coating film, the face of which demands absolute uniformity.
The MasoSine SPS 100 from Watson-Marlow, which was supplied with mechanical seal and PTFE O-ring kit, provided the answer. The speed of the pump is around 50 rpm (2-3 litres/min) when feeding the adhesive, increasing to 350 rpm (18-19 litres/min) during the cleaning process comprising toluene and MEK.
The source point for the adhesive is an open storage tank, with the SPS 100 deployed to feed the substance to a discharge point on the film coating machine at a delivery pressure of 2 bar (30psi) and an accuracy of ±1.0%. Typical pump run time is 8 hours per day.
Sine pump trend
The decision by Anyone Tape to adopt MasoSine pump technology is not the first in Korea. In fact, Watson-Marlow reports that its Korean team have now supplied seven different coating film manufacturers with a total of eight sets of MasoSine SPS 100 pumps in recent months. In addition, the prognosis moving forward is for further orders.
The reason behind this trend is that MasoSine sanitary and industrial pumps are inherently designed to cater for demanding applications such as that at Anyone Tape. In fact, the range offers flows of up to 1650 litres/min 99 cubic metres/hr, pressures up to 15 bar 220psi, and viscous handling up to 8 million centipoise without modification to the pump.