Compouning and pelletization

Processing trials on Coperion ZSK26 compounding extruder.

Set up

• Twin screw, co-rotating, intermesh
• 10-80 kg/h
• L/D 40
• Rpm 120 – 1800
• 3 + 2 feeders, one side feeder
• String pelletizing

Added features

• N², Ventilation (degassing)
• Vacuum unit
• Liquid feeding

Nordson melt filtration

• Continuous melt filtration
• Mesh flexibility

Processing trials/results 

Processing results

• Torque
• Pressure
• Energy
• Melt temperature
• Output
• Flow characteristics

Process parameter optimisation

• Machine pressure, temperature and speed requirements.
• Processability evaluation
• Material evaluations
• Evaluation of recycled material
• Quality improvement
• Tests at industrial relevant conditions
• Raw material quality and consistency

Test volume production

• Compounded PCW
• Modified PCW/PCR

Performance testing

Polymer characterization

• Volatile components
• Odour
• Head space, unknown components
• Molecular characterization
• Gels and polutions
• Visual inspection

Application processing

• Injection moulding
  • C&C, thin wall, general injection moulding
• Film extrusion
  • Blown film, cast film, sheet
• Bottles HIC (Household Industrial Chemicals)
• Thermoforming
  • Appliances, packaging

Application performance tests

• Std tests
• End-use tests (e.g. cap hinge performance)