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SK3000S-REX Extruding Kneader

SK3000S REX Extruding Kneader is used in the processing of materials that require mixing and chemical reaction during the extrusion process for polymer processing, rubber compounding, or other reactive material handling. This is suitable for reactive polymerization for TPU, Spandex, etc


WORKING THEORY

Reactive extrusion (REX) is a continuous process in which an extruder is used as a chemical reactor, allowing process intensification by the combining the chemical synthesis / modification with conventional processes carried out in extruders like compounding, devolatilization and granulation in only one step.

SK3000S-REX Extruding Kneader
kneaders prices

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Reactive Extrusion capacities 

XNEADER  has the following capacities to carry out the process of reactive extrusion: 

  • Synthesis laboratory with batch reactors and mini-compounder unit. 

  • Torque rheometers of different capacities. 

  • Possibility to scale up the reaction to pilot plant scale with the help of simulation software.  

  • Different co-rotating  with screw diameters from 16 to 300 mm and L/D ratios from 8 to 56, completely modular that allow the incorporation of solids and liquids in different points of the extruder. 

  • Use of special dosing systems such as heated reactors and gravimetric feeders for both solids and liquids, vacuum pumps for extraction of unreacted monomers, , reaction by-products and other volatiles. 

  • Possibility of the customer to assist to the trials in the pilot plants.  

  • Characterization laboratory for complete analysis of the obtained products. 

SK3000S-REX Extruding Kneader
Design Consideration

SUNKAIER Kneader is a horizontal, twin screw, closed type continuous kneading/reacting processor. the KRC Kneader has a number of recent successful accomplishments as continuous polymerization / reacting processor for engineering plastics and others. Compared to twin screw extruder, SK3000S Kneader has compact structure such as short L/D and low power while having equivalent kneading and dispersion performance and contributing to rationalization of manufacturing process and cost reduction.

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Reactive extrusion applications

  • Polyaddition: to obtain thermoplastic polyurethanes (TPUs) of different hardness. 

  • Polycondensation: synthesis of polyesters such as polyethene terephthalate (PET), polybutylene terephthalate(PBT) and polyamides (Pas). 

  • Graft reactions and functionalization: functionalization of polyolefins with maleic anhydride and other acrylic monomers (for example PE-g-MAH, PP-g-MAH, PE-g-AA, PE-g-GMA). 

  • Free radical: production of styrenic and acrylic polymers, polystyrene (PS), polymethyl metacrylate (PMMA), Styrene Acrylonitrile (SAN), Styrene maleic anhydride copolymers (SMAC). 

  • Crosslinking: formulation of thermoplastic vulcanizates (TPVs) from polyolefins, rubbers, oils, and cross-linking agents. Crosslink of polyethene with vinyl silanes and peroxides. 

  • Controlled rheology: viscosity reduction of recycled PP (vis-breaking), PAs. 

  • Ionic polymerization: production of polylactic acid (PLA), polycaprolactone (PCL) and polyamide 6 (PA6) by ring opening polymerization reactions. 

  • Glycolysis: chemical recycling of PET. 

  • Hydrolysis: chemical recycling of PLA, PUs, Pas to obtain lactic acid, polyols, amines and acids. 

  • Reactive coupling: production of polymer blends, or in-situ compatibilization with fillers, fibres, nanoparticles, etc. 

  • Transesterification reactions: production of ethylene vinyl alcohol (EVAL) by transesterification of ethylene vinyl acetate (EVA) copolymers with alcohols. 

  • Saponification: Synthesis of elastomeric ionomers from ethylene acrylate copolymers (EMA, EBA). 

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MODELS AND TECHNICAL SPECIFICATIONS

Model

Working Volume(L)

Max Working Volume(L)

Power (KW)

Speed(RPM)

Working Temparature e(C)

Cylinder Design Pressure (MPa)

Jacket Design Pressure (MPa)

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APPLICATION FIELDS

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LAB REACTOR

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MODELS AND TECHNICAL SPECIFICATIONS

Model

Working Volume(L)

Max Working Volume(L)

Power (KW)

Speed(RPM)

Working Temparature e(C)

Cylinder Design Pressure (MPa)

Jacket Design Pressure (MPa)

50








100








200








350








500








750








1000








1500








2000








3000









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