Purui BOPET Film Granulator

Product Overview

The Purui BOPET film granulator is a specialized machine designed for recycling and regenerating waste films. Equipped with a densifier–pelletizing feeding system, it can compact and preheat fluffy used films before efficiently converting them into high-quality recycled pellets. As a customized product, it has no fixed price; it is tailored to meet the specific production needs of each customer and can be adapted to various scales of waste film recycling operations. This equipment is manufactured by the PURUI brand, originating from NANTONG. Leveraging a mature integrated process combining a densifier and a single-screw extruder, it addresses common pain points of traditional granulators—such as uneven feeding and cumbersome procedures—providing plastic recycling companies with an efficient, energy-saving solution for waste film regeneration.

Technical Principle

This granulator employs an integrated densifier–single-screw extrusion process, enabling highly efficient end-to-end processing of waste films from collection to finished pellets. Used films do not require prior shredding and can be fed directly into the densifier (pelletizing hopper), where high-speed rotating blades cut and crush the material. The rapid friction within the hopper generates heat, causing the material to self‑warm. The originally fluffy film contracts and compacts into uniform pellets, significantly increasing its bulk density. These pellets are then smoothly fed into the extrusion screw, completely eliminating issues like bridging or slipping during feeding. Inside the extrusion screw, the material undergoes staged heating and shear‑induced melting and plasticization. After thorough filtration through multiple screens to remove impurities and moisture, the final product is water‑cooled, shaped, and cut into uniform pellets, resulting in high‑quality recycled granules free of air bubbles.

Performance Data

1. Capacity range: Standard models offer 100–1500 kg/h, customizable to suit specific production requirements.
2. Screw parameters: Screw diameters range from φ75 to φ200 mm; screws and barrels are made of 38CrMoAlA steel, with optional bimetallic or nitrided finishes for enhanced wear resistance and durability.
3. Main motor power: 37–355 kW; motor brands include Siemens, ABB, Weg, or other reputable domestic manufacturers, ensuring stable and robust performance.
4. Densifier performance: Capable of handling whole rolls or bundles of film, increasing bulk density by 3–5 times while delivering uniform feeding without bridging.
5. Finished product quality: Pellets contain ≤0.3% moisture, filtered to 80–120 mesh, bubble‑free, and visually appealing.
6. Heating configuration: Supports both electric and electromagnetic heating; heater materials include cast aluminum, cast copper, mica, and ceramic options, all offering high heating efficiency.
7. Cutting method: Offers either die‑face cutting or strand‑cutting, adaptable to different finished product requirements.
8. Core components: Bearings from NSK, SKF, INA, FAG, or other top domestic brands; inverters from ABB, FUJI, Delta, or Siemens, ensuring reliable operation.
9. Delivery and after-sales service: Delivery takes 70–80 working days, with a warranty period of 13 months from the bill of lading date.

Core Advantages

1. Densifier feeding system: Unique pelletizing design increases bulk density by 3–5 times, ensures uniform feeding without bridging, and effectively resolves industry challenges associated with fluffy films—such as bridging and slipping—guaranteeing continuous, stable operation.
2. Self‑friction preheating for energy savings: Material heats itself through high-speed friction inside the densifier, eliminating the need for additional preheating equipment. This not only boosts plasticization efficiency but also significantly reduces energy consumption, saving over 15% per ton processed.
3. Eliminates the shredding step: Whole rolls or bundles of used film can be fed directly into the machine, removing the need for preliminary shredding. This cuts labor costs by 1–2 workers, shortens processing time, and enhances overall productivity.
4. Efficient venting and dehumidification: Multi‑stage venting and dehumidification effectively removes moisture and impurities, keeping finished pellet moisture at ≤0.3%, bubble‑free, and visually appealing, with a defect rate kept below 3%.
5. Customizable adaptation: As a tailor‑made product, equipment parameters can be adjusted to meet specific production needs, accommodating various scales—from 100 kg/h to 1500 kg/h.

Core Value of the Product

1. Cost reduction and efficiency gains: By eliminating separate shredding steps and reducing labor input, while simultaneously improving plasticization efficiency and lowering energy consumption, overall production and operating costs are significantly reduced.
2. Quality assurance: Finished pellets feature low moisture content, no air bubbles, and uniform appearance, with a defect rate kept under 3%, making them suitable for downstream applications such as plastic film production.
3. Increased capacity: With a maximum capacity of 1500 kg/h, the machine can produce up to 36 tons per day when running 24 hours, meeting large-scale waste film recycling demands.
4. Resource circularity: Scrap generated during production can be fully recycled, maximizing resource utilization and aligning with eco‑friendly regeneration principles.

Target Customer Groups

Plastic film manufacturers, waste plastic recycling plants, packaging material companies, and resource regeneration firms—all these enterprises have substantial demand for recycling used films and require efficient, energy‑saving granulation equipment to turn waste into valuable resources, reduce raw material costs, and comply with environmental standards.

Application Scenarios

This equipment is suitable for recycling and regenerating various types of used plastic films, including agricultural greenhouse films, packaging stretch films, BOPP/CPP industrial films, courier plastic bags, heat‑shrink films, and more. Whether dealing with scattered scraps or whole rolls/bundles of industrial waste, the machine can process them directly, producing high‑quality recycled pellets for manufacturing new plastic films, packaging products, and other downstream applications, thus achieving resource circulation.

Solving Industry Pain Points

1. Addressing bridging and uneven feeding issues caused by fluffy films: The densifier’s pelletizing feeding system compacts fluffy films into denser pellets, feeding them smoothly into the extrusion screw, ensuring stable operation and preventing production fluctuations due to uneven feeding.
2. Tackling the challenge of requiring prior shredding, which adds extra steps and labor: The machine can handle whole rolls or bundles directly, eliminating the need for separate shredding, reducing manpower, shortening the production process, and cutting labor and time costs.
3. Solving the problem of insufficient plasticization and low output: Material self‑heats through friction inside the densifier, leading to more thorough plasticization once it enters the extrusion screw. Combined with efficient shear‑melting processes, this boosts plasticization efficiency, allowing the machine to reach a maximum capacity of 1500 kg/h, producing up to 36 tons per day.
4. Resolving issues of excessive air bubbles and high defect rates in wet‑material granules: Multi‑stage venting and dehumidification effectively remove moisture, keeping finished pellet moisture at ≤0.3%, bubble‑free, and visually appealing, with a defect rate maintained below 3%, thereby enhancing product quality and pass rates.

Frequently Asked Questions (FAQ)

Q1: Does this BOPET film granulator require pre‑shredding of used films?
A: No. The machine’s built-in densifier can directly process whole rolls or bundles of used films, using high‑speed cutting and friction to compact them into pellets, eliminating the need for separate shredding and greatly simplifying the production process.
Q2: What is the machine’s capacity range? Can it be customized?
A: Standard models range from 100 to 1500 kg/h. As a custom product, we can adjust equipment parameters according to your specific production needs, adapting to different scales of operation.
Q3: What is the quality of the finished pellets? What is their moisture content?
A: Finished pellets contain ≤0.3% moisture, filtered to 80–120 mesh, bubble‑free, and uniformly shaped, with a defect rate kept below 3%. They are ready for use in downstream plastic product manufacturing.
Q4: What are the delivery and warranty periods?
A: Delivery takes 70–80 working days, with a warranty of 13 months from the bill of lading date. During this period, we provide professional after‑sales maintenance services.
Q5: How does the machine perform in terms of energy consumption?
A: Material self‑heats through friction, eliminating the need for additional preheating equipment. While boosting plasticization efficiency, it significantly reduces energy use—saving over 15% per ton processed—and offers long-term benefits in lowering overall production and operating costs.