250kW Two Stage Extruder PVC Pelletizing Extrusion Line OEM

Wood-plastic Composite Pelletizing (WPC Material Preprocessing)

Two-Stage Extruder

A two-stage extruder, also known as a double-stage extruder, is a high-performance plastic recycling and pelletizing machine designed for processing high-moisture, high-impurity, and highly-volatile materials. It combines the advantages of a single-screw primary extruder and a secondary low-temperature extruder, delivering excellent degassing, stable melting, and superior filtration performance. This configuration makes the two-stage extruder ideal for PE/PP film recycling, woven bag recycling, foam materials, washing line flakes, and low-bulk-density plastics.

The two-stage extrusion process ensures efficient melt filtration, double degassing, and temperature stabilization, producing uniform, high-quality recycled pellets. This system is widely used in plastic recycling plants, packaging material recovery, agricultural film reprocessing, and industrial waste recycling.

Applications of the Two-Stage Extruder

PE/PP Film Recycling: agricultural film, stretch film, packaging film.

Woven Bag & Raffia Recycling: PP woven bags, jumbo bags, tapes.

Foam Material Recycling: EPS, EPE, XPE foam reprocessing.

Washed Flake Pelletizing: post-consumer or post-industrial flakes.

Low-bulk-density Materials: soft plastics, foam scraps, lightweight waste.

General Plastic Reprocessing: LDPE, HDPE, LLDPE, PP, EVA, ABS.

Technical Specifications

These specifications allow the two-stage extruder to handle contaminated, wet, or unstable materials with exceptional efficiency and consistency.

Key Advantages

Double degassing design removes moisture, ink, and volatile impurities effectively.

Stable low-temperature secondary stage prevents material degradation and burning.

High-performance melt filtration ensures clean, uniform recycled pellets.

Designed for high-moisture and high-impurity plastics, providing stable output.

Energy-efficient motors and optimized screw structure reduce operating costs.

Large capacity, suitable for heavy-duty industrial recycling operations.

FAQ

Q1: What materials are suitable for a two-stage extruder?
PE, PP, LDPE, HDPE, LLDPE, PP woven materials, foam, washed flakes, and soft plastics.

Q2: Why choose a two-stage extruder instead of a single screw?
Two-stage extruders offer better degassing, filtration, stability, and pellet quality, especially for film and foam.

Q3: Can the feeding system be customized?
Yes. Options include conveyor feeding, compactor feeder, or force-feeding hopper.

After-Sales Service

We provide complete installation support, operator training, process optimization, 24/7 online technical assistance, spare parts supply, and lifetime maintenance guidance to ensure your two-stage extruder runs efficiently and reliably.