MELT FILTRATION | TECHNOLOGY
weave ensures high output, while the revised heating system keeps the operating costs of the melt filter low. Britas also presented its CMF-BF continuous piston screen changer technology with a backflush function at the K2022 show. Designed for less contaminated industrial and production plastic waste, the CMF-BF can clean the filters automati- cally as it is designed with two backflush pistons in an attachment module which enables the backflush cleaning process of the filter to occur automatically. When a filter change is required, one of the two backflush pistons is first moved into the backflush position. This interrupts the melt flow of the corresponding filter. A small flow of clean melt is branched off and directed backwards through the filter, where it cleans the filter and is discharged to the outside.
Users can select from four filter types for use with the CMF series, including discontinuous and continuous variants. The series is offered in seven models with screen area from 2 x 45 cm2 cm2
and throughputs from 80 to 1,260 kg/h depending on model. The melt filter system handles process temperatures up to 350°C and
process pressures up to 350 bar. German company BB Engineering expanded its
to 2 x 314
portfolio to include a patented large-area vacuum filter especially for processing polyester waste. Instead of operating as a classic PET melt-filter, the screen surface is used as an innovative system applying liquid-state polycondensation and vacuum to produce material with the desired IV value. Its Visco+ vacuum filter, already known as the key component of BB Engineering’s VacuFil
Above: Britas has developed the ABMF PET-C system to meet
demand for improved quality of rPET materials
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IMAGE: BRITAS
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