Recycling soft plastic waste like post-industrial Polyethylene (PE) films and Polypropylene (PP) woven bags presents unique mechanical challenges. Due to their low bulk density, high thermal sensitivity, and tendency to entrap moisture, processing these materials often leads to polymer thermal degradation, high energy consumption, and unstable output.
This case study demonstrates how a mid-sized plastic recycling facility successfully overhauled its production line using Foshan Jiuxin Machinery’s Low-Temperature Eco-Friendly Plastic Granulator.
Client Profile & Recycling Project Overview
- Target Materials: Mixed post-consumer PE stretch film, agricultural PE film, and printed PP woven bag scrap.
- Core Challenge: Frequent polymer burning (yellowing/black spots) caused by conventional high-shear extruders, high energy costs, and low hourly yield.
- Project Goal: Achieve a stable throughput of over 50-100kg/h with premium, uniform, non-degraded recycled pellets while reducing operational carbon footprint.
Technical Bottlenecks in PE Film & PP Woven Bag Processing
| Material Type | Processing Challenge | Traditional Extrusion Failure |
| PE Film (LDPE/LLDPE) | Fluffy, low bulk density, highly elastic | Poor screw filling, output surging, trapped air bubbles |
| PP Woven Bags | High MFI variance, high thermal sensitivity | Overheating during shear, polymer chain degradation, weak tensile strength |
The Solution: Foshan Jiuxin Low-Temperature Eco-Friendly Granulator
To address these challenges, Foshan Jiuxin Machinery supplied a customized recycling pelletizing line equipped with our proprietary low-temperature extrusion and eco-friendly processing technology.
Key Machine Features & Engineering Highlights
- Low-Temperature Gentle Extrusion Technology: Features a specially engineered low-shear modular screw profile. It melts PE and PP plastics at reduced temperature thresholds, fully preserving the polymer's original mechanical properties and viscosity.
- Integrated Forced Side-Feeder / Compactor: Solves the feeding bottleneck of lightweight PE films and woven bag flakes by densifying material prior to screw entry without pre-thermal degradation.
- Multi-Stage Eco-Friendly Vacuum Degassing: Efficiently extracts moisture, trapped air, and printing ink volatiles at low temperatures, producing bubble-free, high-purity granules.
- Energy-Saving Drive System: High-torque energy-efficient motors combined with smart PID heating zones cut overall power consumption by up to 15–20% per ton.
Project Results & Key Performance Metrics
After integrating the Foshan Jiuxin low-temperature granulator, the recycling facility achieved significant performance improvements:
- 35% Yield Increase: Output stabilized at 50-150 kg/h for PE film and 50-100 kg/h for PP woven bags without screw starvation.
- Zero Thermal Carbonization: Pellets maintained high clarity, uniform size, and zero color degradation/black spots.
- 20% Lower Power Consumption: Eco-friendly low-temperature heating zones reduced factory energy overhead noticeably.
Looking for an eco-friendly solution for your PE/PP recycling line?Contact Foshan Jiuxin Machinery Todayto discuss your raw material specifications with our technical engineers.