SOMOS® dryers and drying systems:

Ensuring high-quality final products by proper drying

SOMOS® RDX - compressed air dryers

RDX 2-27 attachment dryers for small volumes

SOMOS® RDX attachment dryers are designed for drying small volumes of polymer pellets with throughputs of around 8 to 10 kg/h using in-plant compressed air. They are ProTec's way of providing an economic alternative to...

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SOMOS® RDM - mobile resin dryers

RDM mobile dryers for moderate throughputs

SOMOS® RDM-10/30 to RDM-140/400 mobile dryers are designed for drying highly flowable, hygroscopic polymer pellets and regrind. They can be used flexibly as auxiliary units for supplying...

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SOMOS® RDF - stationary resin dryers

SOMOS® RDF stationary drying systems for moderate throughputs

The SOMOS® RDF dryer is used for drying hygroscopic polymer pellets. It consists of compact RDF modules which can be flexibly combined, are capable of autonomous operation and have drying capacities of 10 kg/h to 250 kg/h per module.

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SOMOS® RDC - stationary resin dryers

SOMOS® RDC stationary drying systems for moderate to large throughputs of over 1,000 kg/h.

Modular SOMOS® RDC stationary drying systems are suitable for efficiently drying virtually any kind of hygroscopic polymer pellets and regrind. The material is dried with heated drying air, optimum air distribution in the material being dried ensuring uniformly good drying results. ProTec designs and supplies...

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SOMOS® crystallizers

Continuous, efficient crystallization of amorphous PET

PET is an ideal polymer for producing packaging films, bottles, fibers and packaging tapes. Due to its hygroscopic properties, the material has to be dried at around 165°C before being processed. PET regrind, for example, must additionally be converted into cPET by a crystallization process due to its amorphous structure.

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SOMOS® high-performance drying systems meet many different material-specific requirements. If a starting material has not been properly dried for processing in injection molding machines or extruders, this has a negative impact on the final product. If the polymer is too moist, optical defects due to bubbles and streaks on the surface of the final product may appear. Modified physical properties, such as depressed melt viscosity, are not directly visible, but are nevertheless serious defects. Depending on the raw material, overdrying causes severe discoloration and modification of physical characteristics due to oxidation. Components can also outgas from the pellets and so negatively modify the required functions and serviceability of the final product.


The right systems for optimum drying

ProTec drying systems are perfectly tailored for each application, whether as individual units or complete systems, for small right up to very large material throughputs. Hot air dryers provide preheating and remove surface moisture, dry air dryers (adsorption dryers) dry hygroscopic materials while dryers using expanded compressed air are particularly suitable for drying small volumes.



  • Minimal energy requirement
  • Small footprint
  • Guaranteed drying performance
  • User-friendly software
  • Customer-specific design
  • Desired material properties achieved in reproducible processes