Plastics Recycling

Centered on modular, multifunctional twin‑screw extruders, this key technology employs powerful shearing and mixing, efficient devolatilization, and flexible formulation addition to enable the continuous and controlled physical and/or chemical recycling of contaminated and heterogeneous plastic waste. It transforms these materials into standardized recycled products with stable performance and high added value, serving as a critical technological platform that bridges low-end mechanical recycling and high-end chemical recycling.

Process Characteristics:

• Chemical Recycling: Involves solvents, catalysts, or depolymerization reactions, the materials are highly chemically aggressive, requiring exceptional sealing, corrosion resistance, and precise temperature control.

• Waste Film Recycling: Materials exhibit low bulk density and are prone to entanglement. They contain high moisture and volatile content, and may carry impurities such as printing inks. This process requires force feeding, efficient devolatilization, and high wear resistance.

• PET Recycling: Focused on bottle flake recycling, the process requires efficient crystallization drying and high-vacuum devolatilization to remove acetaldehyde and moisture, while strictly controlling the thermal history to prevent viscosity loss.

• High-Value Recycling: During recycling, compounding, modification, and reinforced are integrated to restore or enhance material performance. The process approaches precision processing, with extremely high demands on dispersion, mixing, and devolatilization.

Core Component Requirements:

Screw element: 

• Chemical Recycling: Uses special corrosion-resistant alloys or coatings, with configurations optimized for reactant contact and residence time control.

• Waste Film Recycling: Features enhanced large-pitch feeding and intensive kneading-devolatilization design to ensure consistent feeding capacity and efficient volatile removal.

• PET Recycling: Employs a gentle, low-shear design, focused on optimizing the devolatilization section surface to strictly prevent degradation.

• High-Value Recycling: Equipped with high-performance dispersive and distributive mixing elements, made from highly wear-resistant materials to withstand fillers.

Screw shaft: 

• Chemical Recycling: Offers excellent corrosion resistance and high compatibility compatible with high-pressure sealing systems. 

• Waste Film Recycling: Provides high torsional rigidity to withstand load shocks caused by non-uniform materials.

• PET Recycling: Ensures stable operation under high-vacuum conditions and supports multi-stage venting configurations.

• High-Value Recycling: Provides exceptionally high strength and precision to support complex screw configurations and sustained high-torque operation.

Screw barrel:

• Chemical Recycling: Uses integral corrosion-resistant materials or special liners, integrates precise temperature control with liquid injection and venting ports, and provides a high sealing level.

• Waste Film Recycling: Features a specially designed feed inlet, extra-large vent ports, and a barrel with heavy-duty bimetallic liners for enhanced wear resistance.

• PET Recycling: Equipped with a multi-stage high-vacuum venting system, constructed from materials resistant to moisture and oligomer corrosion, with precise temperature control.