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Description

Energy-Efficient Twin-Screw Plastic Sheet Extrusion Line

The PET/PLA/PP Parallel Twin-Screw Extrusion Machine is designed for the continuous production of high-quality thermoplastic sheets used in thermoforming, food packaging, industrial packaging, and other plastic-product applications.

The production line combines advanced PET extrusion technology with a co-rotating parallel twin-screw structure. Its specially designed screw elements provide efficient material conveying, melting, mixing, plasticizing, and degassing.

Unlike conventional PET single-screw extrusion systems, this machine can process PET materials without requiring a separate crystallizing machine or dehumidifying dryer. This simplifies the production line, reduces equipment investment, shortens material-preparation time, and avoids the high electricity consumption associated with prolonged drying and crystallization.

Typical Production Process

Raw-material feeding → Twin-screw conveying and plasticizing → Vacuum degassing → Melt filtration → Sheet-die extrusion → Calendering and cooling → Edge trimming → Sheet pulling → Winding or cutting

The final production-line configuration can be adapted according to the required material, sheet structure, width, thickness, and production capacity.

Key Features

No Crystallizer Required

The twin-screw design allows PET materials to be processed without a separate crystallizing system, reducing equipment requirements and simplifying production.

No Dehumidifying Dryer Required

The advanced extrusion and vacuum-degassing system removes moisture and volatile substances during processing, eliminating the need for conventional long-duration PET drying equipment.

Parallel Co-Rotating Twin-Screw System

The parallel twin screws provide strong material mixing, uniform plasticization, stable extrusion pressure, and efficient processing of different thermoplastic materials.

Modular Screw Design

The screw uses an element-based modular construction. Screw combinations can be adjusted to suit different materials, formulations, mixing requirements, and production conditions.

Advanced Vacuum Degassing

The barrel incorporates an efficient vacuum system designed to remove moisture, gases, and volatile substances from the melt, improving sheet quality and production stability.

Recycled Material Processing

The machine’s specialized screw structure supports the production of sheet using up to 100% crushed PET flakes, subject to material cleanliness, formulation, and final product requirements.

Mixed PET Material Capability

The system is designed to address the processing challenges associated with high-temperature APET and lower-temperature GPET material mixtures. It can also be configured for CPET and other modified PET materials.

Reduced Energy Consumption

Removing the need for separate crystallizing and drying equipment helps reduce electricity consumption and overall production costs compared with traditional PET single-screw production lines.

Stable Sheet Quality

Efficient melting, mixing, filtration, degassing, cooling, and calendering help produce sheets with consistent thickness, smooth surfaces, and reliable thermoforming performance.

Flexible Production Configuration

The extrusion line can be configured for different raw materials, sheet widths, thicknesses, structures, winding systems, and downstream applications.

Suitable Raw Materials

The XG-J extrusion machine can be configured for:

• PET
• APET
• GPET
• CPET
• Recycled PET flakes
• Modified PET
• PLA
• PP
• PS
• Blended thermoplastic materials

The exact machine configuration should be selected according to the material formulation, recycled-content percentage, sheet specifications, and finished-product requirements.

Sheet Applications

Sheets produced by the machine can be used for:

• Food packaging containers
• Disposable meal boxes
• Fruit and vegetable trays
• Meat and seafood trays
• Bakery and cake packaging
• Plastic cups and lids
• Transparent clamshell packaging
• Electronic component trays
• Cosmetic packaging
• Medical packaging
• Stationery products
• Industrial packaging
• Thermoformed trays and containers
• Biodegradable PLA packaging
• Recycled PET packaging products