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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

MAIN DESIGN FEATURES

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.

INDUSTRY

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


Mode

QS1

QS2

QS3

QS4

QS6

QS8

QS10

QS12

QS15

QS18

QS20

QS24

Paddle Dia mm

25

50

100

125

150

200

250

300

375

450

500

600

Barrel Length mm

255

440

120

900

1080

1440

1800

2160

2700

3240

3600

4320

Barrel Length mm

250

500

1000

1250

1500

2000

2500

3000

3750

4500

5000

6000

Paddle Rotation

~480

~360

~360

~300

~300

~240

~240

~200

~200

~150

~100

~90

Motor KW

1.5

11

30

55

11-75

30-90

55-132

75-200

90~300

110-355

132-600

160-800


APPLICATION FIELDS

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MODELS AND TECHNICAL SPECIFICATIONS


Mode

QS1

QS2

QS3

QS4

QS6

QS8

QS10

QS12

QS15

QS18

QS20

QS24

Paddle Dia mm

25

50

100

125

150

200

250

300

375

450

500

600

Barrel Length mm

255

440

120

900

1080

1440

1800

2160

2700

3240

3600

4320

Barrel Length mm

250

500

1000

1250

1500

2000

2500

3000

3750

4500

5000

6000

Paddle Rotation

~480

~360

~360

~300

~300

~240

~240

~200

~200

~150

~100

~90

Motor KW

1.5

11

30

55

11-75

30-90

55-132

75-200

90~300

110-355

132-600

160-800


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