PET Bottle Shredder and Granulator

Product Overview

This PET bottle shredder and granulator is a customized low-temperature extrusion granulation machine developed by the PURUI brand specifically for PET bottle flake waste. It originates from Nantong. The equipment employs a single-screw extrusion process, compatible with various PET bottle flakes after cold or hot washing. Through a segmented precision temperature control system operating within a low-temperature range of 240–270°C, it achieves complete melting and plasticization while minimizing thermal degradation of PET, ensuring that the finished pellets maintain an intrinsic viscosity (IV) retention rate of ≥85%. Additionally, it features a multi-stage vacuum degassing system and a multi-level high-precision filter die, effectively removing residual moisture, low-molecular-weight substances, and fine impurities, ultimately producing high-purity, stable-quality PET recycled pellets suitable for spinning, injection molding, and other applications, thereby increasing the value of waste recycling by more than 40%.

Technical Principle

The equipment operates on a single-screw extrusion principle, processing PET bottle flakes that have been cleaned and dried. First, a segmented precision temperature control system strictly maintains the processing temperature within the low-range of 240–270°C, ensuring thorough melting and plasticization while significantly reducing thermal degradation of PET and preventing excessive loss of intrinsic viscosity. Next, a multi-stage vacuum degassing system progressively removes residual moisture and volatile low-molecular compounds, further enhancing raw material purity. Subsequently, the material passes through a multi-level high-precision filter die—up to 150 mesh—to effectively eliminate fine impurities, guaranteeing pellet purity. Finally, depending on requirements, users can choose between water-cooled strand cutting or underwater pelletizing, ensuring uniform, transparent pellets with stable performance.

Performance Parameters

1. Standard capacity: 300–2,000 kg/h
2. Processing temperature range: 240–270°C
3. Intrinsic viscosity (IV) retention rate of finished pellets: ≥85%
4. Impurity content: ≤0.5%
5. Filtration accuracy: up to 150 mesh
6. Main motor power: 37–355 kW
7. Compatible feedstock: cold- and hot-washed PET bottle flakes
8. Screw and barrel materials: 38CrMoAlA alloy and bimetallic materials, nitrogen-treated
9. Heating methods: electric heating, electromagnetic heating
10. Heater materials: cast aluminum, cast copper, mica, ceramic heaters
11. Motor brands: Siemens, ABB, Weg, or leading domestic brands
12. Cutting methods: die-face pelletizing, strand cutting
13. Bearing brands: NSK, SKF, INA, FAG, or top domestic brands
14. Inverter brands: ABB, FUJI, Delta, Siemens
15. Delivery time: 70–80 working days
16. Warranty period: 13 months from the bill of lading date

Core Advantages

1. Low-Temperature Plasticization Reduces Degradation: Operating at 240–270°C, this process minimizes thermal degradation of PET, maintaining an IV retention rate of ≥85% in finished pellets, ensuring recycled materials meet performance standards and can be directly used in high-end applications such as spinning and injection molding.
2. Multi-Level Filtration Enhances Purity: Equipped with a multi-stage high-precision filter die up to 150 mesh, it effectively removes fine impurities, resulting in pellets with impurity content ≤0.5%, high purity, and uniform, bright appearance—enabling entry into premium downstream markets and boosting the added value of recycled materials.
3. Wide Compatibility with Various Feedstocks: Capable of handling cold- and hot-washed PET bottle flakes—including mineral water bottles, beverage bottles, edible oil bottles, industrial PET scraps, and clear/colored PET flakes—offering broad applicability to meet diverse recycling plant needs.
4. Customizable Flexible Configuration: As a tailored product, it can be customized according to customer production demands, with core components like motors, bearings, and inverters available from international top-tier brands or reputable domestic manufacturers, balancing performance and cost-effectiveness.
5. High Efficiency, Energy Savings, and Cost Reduction: The equipment enables 24-hour continuous operation, producing up to 48 tons of PET recycled pellets per day, reducing annual virgin PET procurement by over 10,000 tons, increasing the value of waste recycling by more than 40%, and substantially lowering enterprise raw material costs and energy consumption.

Core Value of the Product

1. High IV Retention Ensures Recycled Material Performance Meets Standards, Allowing Direct Entry into High-End Downstream Markets Such as Spinning and Injection Molding, Thus Increasing Product Added Value.
2. High-Precision Filtration Removes Impurities, Producing High-Purity PET Recycled Pellets That Address the Shortcomings of Conventional Equipment—Excessive Impurities and Inability to Penetrate Premium Markets.
3. Customized Capacity Configurations Match Production Needs Across Enterprises of Different Scales, Optimizing Production Efficiency.
4. Significantly Increases the Value of PET Waste Recycling, Reducing Virgin Raw Material Procurement and Helping Companies Cut Costs While Boosting Green Production.

Target Customer Groups

PET bottle flake recycling plants, synthetic fiber producers, food packaging recyclers, large-scale recycled plastics processors, and polyester resource recovery enterprises.

Application Scenarios

Designed specifically for recycling and granulating PET bottle flakes, this equipment is suitable for processing mineral water bottles, beverage bottles, edible oil bottles, industrial PET scraps, cold- and hot-washed PET flakes, as well as clear and colored PET flakes. The resulting high-purity PET recycled pellets can be directly used in spinning to produce synthetic fibers, injection molding for food packaging containers, and manufacturing various PET plastic products, enabling high-value circular utilization of PET waste.

Solutions to Industry Pain Points

1. Addresses the issue of PET yellowing due to high-temperature degradation, significant loss of intrinsic viscosity, and substandard recycled material performance: By employing a low-temperature plasticization process at 240–270°C, thermal degradation is minimized, ensuring an IV retention rate of ≥85%, thus meeting the performance requirements of high-end processing.
2. Solves the problem of insufficient filtration precision and excessive impurities in conventional equipment, which prevents entry into premium downstream markets: Equipped with a multi-stage high-precision filter die up to 150 mesh, it controls impurity content in finished pellets to ≤0.5%, producing high-purity pellets suitable for spinning, food packaging, and other high-end applications.
3. Tackles the challenge of low added value in recycled materials, limiting supply to only low-end markets: With high-purity, high-IV recycled pellets, the product’s market positioning is elevated, significantly increasing the value of waste recycling and creating greater profit margins for enterprises.

Frequently Asked Questions (FAQ)

Q1: What is the capacity range of this PET bottle shredder and granulator?
A: The standard capacity is 300–2,000 kg/h, customizable based on customer production needs, with a maximum daily output of up to 48 tons.
Q2: What applications can the PET recycled pellets produced by this equipment serve?
A: With an intrinsic viscosity retention rate of ≥85% and impurity content ≤0.5%, the finished pellets can be directly used in spinning to produce synthetic fibers, injection molding for food packaging containers, and manufacturing various PET plastic products, among other applications.
Q3: How long is the warranty period?
A: The product comes with a 13-month warranty starting from the bill of lading date, during which relevant after-sales support services are provided.
Q4: What types of PET bottle flakes can this equipment process?
A: It accommodates cold- and hot-washed PET bottle flakes, including mineral water bottles, beverage bottles, edible oil bottles, industrial PET scraps, and clear/colored PET flakes.
Q5: Can core components be selected from different brands?
A: Yes, core components such as motors, bearings, and inverters can be chosen from international top-tier brands like Siemens, ABB, NSK, or from reputable domestic manufacturers, balancing performance and cost considerations.