Continuous Melt Filtration

Wood and paper are very common impurities in plastic recycling. Conventional filter systems using mesh screens are usually unable to manage even small amounts of such impurities. The continuous CDF-type melt filter separates contamination such as paper, wood, aluminum or rubber efficiently and can deal with large amounts of contaminants in the melt stream (up to 5%). A scraper removes the contamination from the surface of a rotating screen disc.

The impurities are discharged continuously from the CDF, while the filtrated melt is forwarded to the pelletizing system. The melt pressure in front of the filtration disc automatically controls the function of the Scraper.

Easy Maintenance: Filter Disc Replacement

The filter discs are manufactured from hardened steel. Replacement is very simple as the filter screen is freely accessible once the split housing has been opened.


Consequently, the filter screen can be replaced in approximately 40 minutes using conventional tools, and can be reused numerous times.

The CDF melt filters from MAS
Type CDF 300 CDF 300-D CDF 500 CDF 500-D
Diameter of filter 1 x Ø 300mm 2 x Ø 300mm 1 x Ø 510mm 2 x Ø 510mm
Filter surface 706 cm² 1384 cm² 1800 cm² 3600 cm²
Filtration finesse 130μm – 500μm 130μm – 500μm 130μm – 500μm 130μm – 500μm
Max. pressure 200 bar 200 bar 200 bar 200 bar
Capacity 300 – 700 kg/h 700 – 1200 kg/h 1200 – 1800 kg/h 1200 – 1800 kg/h

* Technical designs protected by various patents.