Drying, conveying as well as dosing and mixing systems with highest accuracy

Process description

Plastic compounding is a continuous, multi-stage process for the production plastic formulations by mixing polymers and additives in a molten state using twin screw extruders.

Typical end products:

The end products are pellets or granules for later use in other plastic processes, such as injection moulding or extrusion. For example: mono-pigment and additive masterbatches, filler and fibre reinforced compounds and tailor-made masterbatches. Typically short run lot sizes (weight) are produced.


The raw materials are fed into the heated barrel of a twin screw extruder. Here the recipe will be mixed to achieve a homogenous blend and the molten plastic forced through a die. The extrudate is cooled and then pelletized.

Typical materials being processed

Use of raw polymers, regrind and compounds but also powders, fibres, liquids and gases.

Description of motan system/equipment used

Drying, conveying as well as dosing and mixing systems with highest accuracy.

Typical dosing & mixing units

Highly accurate, complex and flexible loss-in-weight dosing & mixing systems (GRAVIPLUS, C-FLEX ER, C-FLEX M, CT and CV units).

Wavin UK logo
John Guest logo
Plastek UK Ltd logo
CRC Evans logo
Fibre Extrusion Technology logo
Utz Ltd logo

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