Twin Screw Extruder Plastic

Fields of application

Polymer Materials and the Plastics Industry：
Plastic Modification and Compounding Granulation:
Filler Modification: Uniformly blending fillers such as calcium carbonate, talc powder, and glass fibres with the plastic matrix to reduce costs while enhancing rigidity, heat resistance, and other properties.
Reinforcement Modification: Incorporating chopped fibres like glass or carbon fibres into plastics to substantially increase material strength.
Alloying: Achieving uniform microphase distribution of two or more incompatible polymers (e.g., PC/ABS, PP/EPDM) via compatibilisers within an extruder to produce high-performance polymer alloys.
Colouring and Pelletisation: Uniformly blending masterbatches or pigments with resin to produce colour-consistent plastic pellets.

Reactive Extrusion:
Continuous execution of polymer chemical reactions (e.g., grafting, polymerisation, cross-linking, degradation) within the extruder.

Examples:
Maleic anhydride grafting of polyolefins: Production of bonding resins or compatibilisers.
Controlled degradation: PP degradation via peroxides for spinning applications.
Polyamide polymerisation: Direct nylon formation through monomer polycondensation.
Devolatilisation and degassing: Efficient removal of residual monomers, solvents, moisture and other volatiles from materials via vacuum ports on the barrel, used in high-purity material production and recycled material processing.

Food and pharmaceutical industries

Food processing: For cooking, shaping and puffing breakfast cereals, snacks, pet food, confectionery (e.g. toffee), noodles, etc.

Pharmaceuticals: Employed for drug granulation, mixing carriers with drugs for sustained-release formulations, and preparing solvent-free drug delivery systems.

Masterbatch Preparation: Production of high-concentration colour masterbatches and additive masterbatches (e.g., antioxidant and flame retardant masterbatches).

Industry Advantages

Superior mixing capability: Achieves a perfect combination of distributed and dispersed mixing.

Self-cleaning function (particularly during co-rotation): minimises material degradation, ideal for switching colours and formulations.

High flexibility: modular design permits flexible combination of screw and barrel configurations to suit process requirements.

High heat and mass transfer efficiency: suitable for reactive extrusion and devolatilisation processes.

Broad processing range: handles diverse feedstock forms including powders, pellets, fibres, and liquid additives.

Continuous production: delivers high efficiency with consistent product quality.