Stretch Film Granulator

Product Overview

The stretch film granulator is a specialized machine designed for the recycling and regeneration of plastic films. Equipped with an advanced densifier–pelletizing feeding system, it can directly process whole rolls or bales of loose, bulky waste films without requiring prior shredding. Through a professional process, the machine compacts and preheats the waste film before efficiently converting it into high-quality recycled pellets. The finished pellets have a moisture content of ≤0.3% and excellent appearance with no air bubbles, meeting material regeneration needs across multiple sectors such as plastic film production and renewable resource recovery. As a customized product, the equipment can be configured according to customer production capacity requirements; standard models offer capacities ranging from 100 to 1,500 kg/h, suitable for various production scales.

Technical Principle

This machine employs an integrated process combining a densifier and a single-screw extruder, enabling seamless operation throughout the entire recycling and pelletizing workflow. First, waste films are fed directly into the densifier (pelletizing hopper), where high-speed rotating blades cut and shred the material. During rapid movement, friction generates heat, causing the material to self‑heat and compact into uniform pellets. After increasing the bulk density by 3–5 times, the material is smoothly fed into the extrusion screw, effectively eliminating issues like bridging, slippage, and uneven feeding common in traditional equipment. In the extrusion stage, the material undergoes staged heating and shear action to achieve complete melting and plasticization. Subsequently, multi‑stage filtration removes impurities, while venting and dehumidification processes eliminate residual moisture. Finally, water‑cooled shaping and cutting produce high‑quality recycled plastic pellets.

Performance Parameters

1. Standard model capacity: 100–1,500 kg/h
2. Screw diameter: φ75–φ200 mm
3. Main motor power: 37–355 kW
4. Bulk density increase: 3–5 times
5. Finished pellet moisture content: ≤0.3%
6. Filtration precision: 80–120 mesh
7. Screw and barrel materials: 38CrMoAlA alloy, bimetallic construction, nitrogen treatment
8. Heating methods: electric heating, electromagnetic heating
9. Heater materials: cast aluminum, cast copper, mica, ceramic heaters
10. Motor brands: Siemens, ABB, Weg, or leading domestic brands
11. Cutting methods: die-face pelletizing, strand cutting
12. Bearing brands: NSK, SKF, INA, FAG, or top domestic brands
13. Inverter brands: ABB, FUJI, Delta, Siemens
14. Delivery time: 70–80 working days
15. Warranty period: 13 months from the bill of lading date
16. Trademark/brand: PURUI
17. Country of origin: NANTONG

Core Advantages

1. Stable densifier feeding system: Featuring a densifier–pelletizing design, this system increases bulk density by 3–5 times, ensuring smooth, even feeding without bridging, thus resolving issues of slippage when processing loose films and guaranteeing continuous, stable production.
2. Self‑friction preheating for energy efficiency: The material achieves self‑heating through high-speed friction within the densifier, eliminating the need for additional preheating equipment, enhancing plasticization efficiency, and significantly reducing energy consumption—saving over 15% per ton processed.
3. Elimination of shredding steps reduces costs: The machine can handle whole rolls or bales directly, bypassing the need for preliminary shredding, decreasing labor requirements by 1–2 workers, lowering labor costs and processing time, and boosting overall productivity.
4. Superior venting and dehumidification: Multi‑stage venting and dehumidification effectively remove moisture, resulting in finished pellets with moisture content ≤0.3%, excellent appearance free of air bubbles, and a defect rate kept below 3%, ensuring consistent, reliable product quality.
5. Flexible customization: As a custom‑made solution, the machine can be tailored to meet specific production capacity needs, with standard models covering 100–1,500 kg/h, suitable for businesses of varying sizes. Core components can also be selected from international premium brands or high‑quality domestic options, accommodating diverse budgets and quality expectations.

Core Value of the Product

1. Simplified processes reduce costs and boost efficiency: By eliminating separate shredding steps, minimizing manual labor, and streamlining production workflows, the machine enhances overall productivity, enabling up to 36 tons of daily output under 24-hour operation.
2. Energy savings lower operating costs: With its self‑friction preheating design and improved plasticization efficiency, the machine saves more than 15% on electricity per ton processed, significantly reducing long-term energy expenses.
3. High‑quality pellets ensure profitability: Low moisture content, absence of air bubbles, and a defect rate maintained below 3% allow for 100% closed-loop reuse of production scraps, improving raw material utilization and market competitiveness.
4. Customizable solutions meet diverse needs: Tailored to specific production volumes, the machine accommodates enterprises of different scales, with core components available from international premium brands or domestic high‑quality suppliers, satisfying varied production scenarios and budgetary constraints.

Target Customer Groups

Plastic film manufacturers, waste plastic recycling plants, packaging material companies, and renewable resource firms—all face the need to recycle and regenerate used plastic films. This equipment’s high efficiency, energy savings, and superior pelletizing capabilities help them improve resource utilization, reduce production costs, and enhance product profitability.

Application Scenarios

This machine is suitable for recycling and regenerating various types of waste plastic films, including agricultural greenhouse films, packaging stretch films, BOPP/CPP industrial films, courier plastic bags, heat‑shrink films, and more. Whether operating small‑scale recycling facilities or large‑scale plastic manufacturing enterprises, users can transform waste films into high‑quality recycled pellets for reuse, achieving resource circularity and reducing raw material procurement costs.

Solutions to Industry Pain Points

1. Addressing issues of loose film bridging, slippage, and uneven feeding: The densifier–pelletizing feeding system compacts loose films into dense pellets with 3–5 times higher bulk density, ensuring smooth, uniform feeding and maintaining continuous production.
2. Solving the problem of increased processing steps and labor due to pre‑shredding: The machine handles whole rolls or bales directly, eliminating the need for separate shredding operations, reducing labor by 1–2 workers, and cutting both labor costs and processing time.
3. Overcoming insufficient plasticization and low throughput: The material self‑heats through friction within the densifier, boosting plasticization efficiency, complemented by staged heating and shearing during single‑screw extrusion, ensuring thorough plasticization. Standard models deliver up to 1,500 kg/h, with a maximum daily output of 36 tons under 24‑hour operation.
4. Tackling problems of wet material producing bubbly pellets and high defect rates: Multi‑stage venting and dehumidification effectively remove moisture, yielding finished pellets with moisture content ≤0.3%, excellent appearance free of air bubbles, and a defect rate kept below 3%. Additionally, production scraps can be fully recycled, improving raw material utilization.

Frequently Asked Questions (FAQ)

Q1: What types of waste plastic films can this stretch film granulator process?
A: The machine can handle agricultural greenhouse films, packaging stretch films, BOPP/CPP industrial films, courier plastic bags, heat‑shrink films, and other varieties of waste plastic films. No prior shredding is required; whole rolls or bales can be fed directly into the machine.
Q2: What is the equipment’s capacity range? Can it be customized?
A: Standard models offer capacities from 100 to 1,500 kg/h. As a custom‑made product, configurations can be tailored to meet specific production volume requirements, accommodating businesses of different scales.
Q3: What cost savings can be achieved by using this equipment?
A: First, the elimination of shredding steps reduces labor by 1–2 workers, cutting labor costs. Second, self‑friction preheating lowers energy consumption by more than 15% per ton processed, reducing overall energy expenses. Moreover, the low defect rate of finished pellets allows for 100% recycling of production scraps, improving raw material utilization and minimizing waste.
Q4: How long is the warranty period? And how long does delivery take?
A: The warranty lasts 13 months from the bill of lading date, while delivery typically takes 70–80 working days, subject to adjustments based on customized specifications.
Q5: What is the quality of the finished pellets?
A: Finished pellets have a moisture content of ≤0.3%, filtration precision of 80–120 mesh, excellent appearance free of air bubbles, and a defect rate kept below 3%. They are ready for direct use in plastic product manufacturing.