PET Food-Grade Bottle Flake Granulator

Product Overview

The PET food-grade bottle flake granulator is a low-temperature extrusion granulation machine specially designed for PET bottle flake waste. It can be customized according to customer production requirements and does not have a fixed price. The equipment employs a single-screw extrusion process, suitable for various types of cleaned and dried PET bottle flake materials. Through segmented, precise temperature control within the 240–270°C low-temperature range, it achieves melt plasticization while minimizing PET thermal degradation, preserving material characteristics and viscosity, and producing high-purity PET recycled pellets. Equipped with multi-stage vacuum degassing and multi-level high-precision filtration systems, it removes residual moisture, low-molecular substances, and fine impurities, ultimately forming pellets via water-cooled strand cutting or underwater pelletizing. The resulting pellets are uniform, transparent, and stable in appearance, meeting reuse requirements for spinning, injection molding, and other applications.

Technical Principle

This PET food-grade bottle flake granulator operates based on a single-screw extrusion process, with five key stages: First, it accepts PET bottle flake materials that have undergone cold or hot washing and drying, requiring no additional pre-processing before entering the production line. Second, a segmented, precise temperature control system strictly maintains processing temperatures between 240–270°C, significantly reducing thermal degradation caused by high heat while ensuring material melt plasticization and preserving the original material’s characteristic viscosity. Third, a multi-stage vacuum degassing system continuously extracts residual moisture and low-molecular volatile substances during plasticization, preventing defects such as bubbles and voids in the recycled pellets. Fourth, a multi-level high-precision filter die ensures filtration accuracy up to 150 mesh, thoroughly removing minute impurities and guaranteeing product purity. Finally, depending on customer needs, either die-face pelletizing or strand-cutting methods can be selected, ensuring uniform pellet shape and quality that meets downstream application requirements.

Performance Parameters

1. Standard capacity: 300–2000 kg/h
2. Processing temperature range: 240–270°C
3. Retention rate of IV value (intrinsic viscosity) in finished pellets: ≥85%
4. Impurity content in finished pellets: ≤0.5%
5. Filtration precision: up to 150 mesh
6. Main motor power: 37–355 kW
7. Compatible materials: cold-washed and hot-washed PET bottle flakes (mineral water bottles, beverage bottles, edible oil bottles, industrial PET scraps, clear or colored PET flakes, etc.)
8. Screw and barrel material: 38CrMoAlA alloy or bimetallic material, nitrogen-treated
9. Heating method: electric heating or electromagnetic heating
10. Heater materials: cast aluminum, cast copper, mica, ceramic heaters
11. Motor brands: Siemens, ABB, Weg, or leading domestic brands
12. Cutting method: die-face pelletizing or 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
17. Trademark/brand: PURUI
18. Place of origin: NANTONG

Core Advantages

1. Low-temperature plasticization protection: Operating at 240–270°C minimizes PET thermal degradation, achieving an IV value retention rate of ≥85%, with recycled material properties approaching those of virgin material, making it suitable for high-end applications like spinning and injection molding.
2. Multi-stage filtration for enhanced purity: Featuring a multi-level high-precision filter die up to 150 mesh, effectively removing fine impurities, resulting in finished pellets with impurity content ≤0.5%, high purity, and uniform, bright appearance—meeting the demands of high-end sectors such as food packaging recycling.
3. Wide material compatibility: Accepts both cold-washed and hot-washed PET bottle flakes, including mineral water, beverage, edible oil bottles, industrial PET scraps, and clear or colored PET flakes, without needing to replace core components, offering exceptional adaptability.
4. Customizable capacity: Tailored to meet specific customer production needs, covering a broad capacity range of 300–2000 kg/h, suitable for small recycling plants as well as large-scale recycled plastics processors.
5. High-value recycling: By maintaining stable performance and controlling purity, it transforms PET bottle flake waste into high-quality recycled pellets suitable for premium applications, increasing the value of waste reuse by over 40% and helping customers expand into high-end downstream markets, breaking free from reliance on low-end markets.
6. Use of international top-tier components: Core parts utilize world-class brands like Siemens, ABB, NSK, SKF, or leading domestic manufacturers, ensuring robust operational stability, low failure rates, and a generous 13-month warranty, thereby reducing long-term maintenance costs.

Core Product Value

1. High IV value retention allows recycled material to be directly used in spinning, injection molding, and other high-end processes, overcoming the limitation of recycled materials being confined to low-end applications and enhancing product added value.
2. Broad material compatibility enables handling various PET bottle flake wastes without additional equipment changes, expanding raw material sources and reducing procurement costs.
3. Customized capacity design precisely matches customer production scales, avoiding underutilization or oversupply, optimizing production efficiency and return on investment.
4. Low-temperature plasticization reduces degradation, saving over 10,000 tons of virgin PET annually and supporting green manufacturing aligned with sustainable development goals.
5. With 24-hour continuous operation, producing up to 48 tons of PET recycled pellets per day, it dramatically boosts waste processing efficiency and meets large-scale recycling demands.

Target Customer Groups

PET bottle flake recycling plants, synthetic fiber producers, food packaging recyclers, large-scale recycled plastics processors, and polyester resource recovery companies—especially those with high-end recycled material production needs, seeking to increase the added value of waste reuse, as well as processing enterprises requiring equipment tailored to their specific production capacities.

Application Scenarios

This PET food-grade bottle flake granulator is primarily used for recycling and granulating various PET bottle flake wastes, including mineral water bottles, beverage bottles, edible oil bottles, industrial PET scraps, cold-washed PET flakes, hot-washed PET flakes, clear PET flakes, and colored PET flakes. The resulting high-purity PET recycled pellets can be directly utilized in spinning to produce synthetic fiber raw materials, injection molding for food packaging containers, and manufacturing polyester products, serving both high-end and mid-range downstream markets and enabling customers to achieve high-value waste reuse.

Solutions to Industry Pain Points

1. Addressing the issue of PET degradation, yellowing, and significant loss of intrinsic viscosity during high-temperature processing: By employing a low-temperature plasticization process at 240–270°C and precisely controlling processing temperatures, thermal degradation is minimized, ensuring an IV value retention rate of ≥85% and meeting high-end processing requirements.
2. Solving the problem of insufficient filtration precision in conventional equipment, excessive impurities, and inability to enter high-end downstream markets: Equipped with a multi-level high-precision filter die up to 150 mesh, it keeps finished pellet impurity levels below 0.5%, delivering high purity and stable quality suitable for food packaging recycling, spinning, and other high-end applications.
3. Tackling the challenge of low added value in recycled materials and limited market access: With its high IV value retention and superior purity, it transforms PET bottle flake waste into high-quality recycled material, boosting reuse value by over 40% and helping customers expand their high-end customer base, thus increasing profit margins.
4. Overcoming the limitation of single-material compatibility in existing equipment, which cannot handle diverse PET bottle flake wastes: Compatible with both cold-washed and hot-washed PET bottle flakes, it eliminates the need to replace core components when processing different materials, broadening raw material sources, reducing procurement costs, and enhancing operational flexibility.

Frequently Asked Questions (FAQ)

Q1: What is the capacity range of this PET food-grade bottle flake granulator? Can it be customized?
A: The standard capacity ranges from 300 to 2000 kg/h, and customization is available based on customer production needs, allowing for capacity configurations tailored to each enterprise’s scale.
Q2: What is the retention rate of the IV value in the finished pellets? Which applications are they suitable for?
A: The IV value retention rate of finished pellets is ≥85%, with recycled material properties approaching those of virgin material, making them suitable for high-end applications such as spinning synthetic fibers and injection molding food packaging containers, as well as general polyester product manufacturing.
Q3: What types of PET bottle flake materials can this equipment process?
A: It accommodates cold-washed and hot-washed PET bottle flakes, including mineral water bottles, beverage bottles, edible oil bottles, industrial PET scraps, and clear or colored PET flakes, without requiring replacement of core components for processing different materials.
Q4: What are the delivery time and warranty period for this equipment?
A: Delivery takes 70–80 working days, with a 13-month warranty starting from the bill of lading date. Core components use internationally renowned brands or top domestic manufacturers, ensuring stable operation and reliable performance.
Q5: Compared to conventional granulators, what tangible benefits can this equipment bring to businesses?
A: First, it increases the added value of recycled materials by over 40%, opening doors to high-end markets and boosting profits; second, it reduces annual virgin PET procurement by more than 10,000 tons, lowering raw material costs; third, with 24-hour continuous operation producing up to 48 tons per day, it enhances waste processing efficiency and expands production capacity.