With a total of four filter discs


The MAS 24 Lab Extruder has been developed specifically […]

The MAS 24 Lab Extruder has been developed specifically for plastics manufacturers and compounders to develop formulas in a scientifically oriented manner and produce them in very small volumes, the company says. The highly compact build, with a screw length of just 400 millimetres and a diameter of 48 millimetres, narrowing down to 24 millimetres, is equipped with interchangeable mixing elements. The large feed opening makes it possible to process regrind material, flakes and finely ground film or fibres, MAS says. It also allows full control over shear strength and, thus, the melt temperature of the material by varying the screw speed .

The maximum output of this lab machine is in the range of 10 to 35 kilograms per hour. The MAS 24 Lab Extruder will be presented in operation at K 2016 in combination with an underwater pelletizing unit.MAS says its technology has held a U.S. Food and Drug Administration "No Objection Letter" for food-contact grade recycling of polyethylene terephthalate (PET) since mid-2015 and meets all European Food Safety Authority  criteria.MAS also will exhibit the latest generation CDF elt filter series, a leading continuous filter system for recycling applications. The CDF system has reached its current status thanks to a design that permits previously unattainable filtration surfaces, the company says.

Smallest CDF 300 uses a 300-millimetre disc with a square-centimetre filter surface area and is suitable for a melt throughput of 300 to 700 kilograms per hour. All other sizes use a 510-millimetre filter disc. The CDF 500, with one disc, offers a filtration area of 1,640 square centimetres kilograms per hour. The next step up offers twice the filter surface area at 3,280 square centimetres and allows a throughput of kilograms per hour. The largest filter unit, with the designation CDF-500-D-P, consists of two parallel CDF-500-D units with a total of four filter discs and a filter surface area of 6,560 square centimetres. At a possible melt throughput of up to 4,000 kilograms per hour, it is currently one of the highest-performing units of its size on the market.

MAS says.MAS also will present the third generation of its conical, co-rotating, twin-screw extruder. It is available in six different sizes with output ranges from 10 kilograms per hour to more than 2,000 kilograms per hour. The characterising feature of MAS’ new extruder generation is its optimised machine design, according to the company. Its segmented barrel construction permits the exchange of individual barrel sections rather than the entire cylinder or the selective application of special wear protection to individual cylinder sections. The new series is exemplified by the MAS 75, which is suitable for an output of up to 1,100 kilograms per hour, the company says.

Extrude screw barrel