Advanced Solution for Producing Food-Grade Recycled PET Sheets from PET Flakes
ACERETECH provides advanced rPET sheet extrusion solutions for converting high-quality recycled PET flakes into food-grade recycled PET (rPET) sheets.
The complete production line has achieved FDA certification and supports E to G grade recycled PET production, providing a reliable solution for customers who require recycled PET materials for food-contact packaging applications.
By integrating advanced extrusion technology, vacuum degassing, continuous melt filtration, and precise process control systems, ACERETECH helps customers transform post-consumer PET packaging waste into high-value sustainable packaging materials.
Recycling & Material
PET Bottle Flakes
PET Bottle
PET Film
PET Food Grade Products
Key Advantages of ACERETECH rPET Sheet Extrusion Line
01. FDA-Certified E to G Grade rPET Production
ACERETECH rPET sheet extrusion line has achieved FDA certification and supports E to G grade recycled PET production for food-contact applications.
Through advanced extrusion processing, material purification, and quality control technologies, the system helps produce recycled PET sheets with stable quality and reliable performance.
02. Direct Flake-to-Sheet Production
The system enables direct conversion of qualified washed PET flakes into recycled PET sheets without additional pelletizing processes.
Advantages include:
• Reduced production steps
• Lower energy consumption
• Improved production efficiency
• Better preservation of PET material properties
This integrated process provides customers with a more efficient solution for converting recycled PET waste into finished packaging materials.
03. Advanced Decontamination and Melt Purification
During extrusion, the integrated reaction chamber and vacuum degassing system effectively remove:
• Residual moisture
• Volatile substances
• Low molecular weight compounds
• Processing impurities
The continuous melt filtration system further improves melt purity by removing remaining solid contaminants.
These technologies help maintain stable PET melt quality and support food-grade rPET sheet production.
04. Stable PET Processing Performance
The PET-optimized extrusion system provides:
• Uniform melting
• Gentle plasticization
• Stable melt pressure
• Reduced PET degradation
The online melt viscosity monitoring system continuously monitors melt conditions and helps maintain consistent sheet quality during continuous production.
05. High-Quality Sheet Output
The precision T-die and three-roll calendering system ensure:
• Excellent transparency
• Uniform thickness
• Smooth surface finish
• Excellent thermoforming performance
• Stable dimensional accuracy
Food-Grade rPET Sheet Applications
rPET (recycled polyethylene terephthalate) sheets maintain the excellent properties of PET while providing the environmental advantages of recycled materials.
With high transparency, excellent impact resistance, good thermal stability, and outstanding thermoforming performance, food-grade rPET sheets are widely used in:
• Food containers
• Fruit and vegetable trays
• Egg trays
• Beverage cups and lids
• Thermoformed food packaging
• Electronic packaging trays
• Industrial packaging applications
Suitable Raw Materials
The production line is designed for processing high-quality recycled PET materials, including:
• Post-consumer PET bottles
• Food-contact PET packaging waste after washing and sorting
• Washed PET bottle flakes
• High-quality recycled PET flakes
Stable production of food-grade rPET sheets requires strict control of:
• Raw material cleanliness
• Contamination level
• Moisture content
• Intrinsic viscosity (IV)
Technical Specifications
| Application |
Food-grade rPET sheet production |
| Certification | FDA certificate |
| Recycled PET grade | E to G Grade |
| Raw Material | Raw Material |
| Sheet Thickness | 0.15–1.5 mm |
| Sheet Width | Max. 830 mm |
| Sheet Structure | 1-layer / 2-layer / 3-layer |
| Output Capacity | Up to 600 kg/h |
| Main Applications |
Food containers, thermoforming packaging, trays, cups, electronic packaging |
Working Process
The complete rPET sheet extrusion process includes:
Vacuum Feeding System
→ Reaction Chamber
→ ACS Single Screw Extruder
→ Continuous Screen Changer
→ Melt Pump
→ Online Melt Viscosity Measurement System
→ T-Die
→ Three-Roll Calender
→ Edge Trimming Unit
→ Silicone Oil Coating System
→ Haul-Off Unit
→ Winder
System Configuration and Working Principle
Reaction Chamber
Washed PET flakes are fed into the reaction chamber where controlled frictional heating is generated by high-speed rotating components.
The process helps preheat and homogenize PET flakes while removing part of the moisture and volatile substances before extrusion.
Under controlled conditions, impurities and volatile components are extracted to improve material quality and extrusion stability.
Material Level Control Valve
The specially designed valve is integrated into the PET vacuum-sealed reaction chamber to ensure precise material flow control.
By adjusting the valve opening according to the material level inside the chamber, the system maintains stable filling conditions and accurately controls PET residence time.
This ensures sufficient heat transfer, moisture removal, and material homogenization before extrusion, while achieving continuous and uniform feeding to the extruder.
The optimized feeding control helps maintain stable extrusion conditions and consistent quality of food-grade rPET sheets.
Single Screw Extruder
The PET-specific single screw extruder is optimized for recycled PET processing.
The system provides:
• Efficient melting
• Uniform plasticization
• Stable material conveying
• Reduced thermal degradation
The vacuum degassing zone removes residual moisture and volatile components from the PET melt.
Vacuum Degassing System
The barrel is equipped with double vacuum degassing zones. Combined with a liquid water ring pump and Roots three-stage vacuum system, the degassing unit effectively removes residual moisture, volatile substances, and low molecular weight compounds generated during PET melting.
This advanced vacuum degassing technology improves PET melt quality, reduces material degradation, and ensures stable production of high-quality rPET sheets.
Piston type Filtration System
The piston type screen changer removes remaining solid impurities from molten PET.
Combined with the melt pump, the system provides stable melt pressure and uniform feeding to the T-die.
Online Melt Viscosity Monitoring System
The online viscosity monitoring system continuously measures PET melt conditions during production.
This enables better process control and helps maintain consistent recycled PET sheet quality.
T-Die
The T-Die is specially designed for PET/rPET sheet extrusion, featuring a coat-hanger flow channel design to ensure uniform melt distribution and stable sheet thickness.
Key Features:
• Die Material: 5CrNiMo alloy steel
• Die Cavity: Chrome-plated surface (chrome thickness: 0.02–0.05 mm, hardness: HV900–1000)
• Die Lip Adjustment: Upper lip fixed, lower lip adjustable by bolts for precise thickness control
• Effective Die Lip Width: 950 mm
• Effective Product Width: 800 mm
• Sheet Thickness: 0.2–1.5 mm
• Temperature Control Zones: 5 zones
• Heating Power: Approx. 20 kW
Three-Roll Calender
The specially designed three-roll calender system is optimized for PET/rPET sheet production, providing efficient cooling, excellent transparency, and stable sheet thickness control.
Key Features:
• Three roll speeds can be adjusted individually by servo motors or synchronized according to production requirements
• Hydraulic roll gap adjustment for precise thickness control
• Equipped with dial indicators and position-limit devices for accurate operation
Temperature Control Unit
The temperature controller is equipped with an integrated water tank for water circulation and recycling, ensuring stable temperature control during PET sheet production.
Key Features:
• Integrated water tank for water circulation
• Safety alarms for over-temperature, over-pressure, and low water level
• Mobile design with wheels for easy movement
Edge Trimming Unit
The edge trimming unit is designed to achieve precise sheet edge cutting and can be adjusted according to different sheet widths.
Key Features:
• Cutting blade positions adjustable according to sheet width
• Pneumatic cylinder control for blade opening and closing
• Round blade design for stable and clean edge trimming
Edge Trimming Winder
The edge trimming winder is designed for collecting trimmed sheet edges with stable winding performance.
Key Features:
• Working position adjustable by hand wheel for easy operation
• Two working positions available
• Driven by torque motor for stable winding tension control
Silicone Coating & Drying Unit
The silicone coating and drying unit is designed for uniform coating and efficient drying of PET sheets.
Key Features:
• Pneumatic cylinder control for coating roll and drying box opening/closing
• Silicone oil circulation system for efficient material utilization
• PU rubber coating roll for uniform coating performance
• Infrared heating tubes combined with fans for effective drying
Haul Off
The haul-off unit provides stable sheet pulling and precise speed control, ensuring smooth operation during PET sheet production.
Key Features:
• Haul-off speed can be adjusted independently or synchronized with the calender speed
• Equipped with safety line and emergency stop system
• Static eliminator installed for removing surface static electricity
Sheet Accumulator
The accumulator is designed to temporarily store the sheet during roll change, enabling continuous production without stopping the extrusion line.
Key Features:
• Accumulates PET sheets during automatic winding roll change
• Pneumatic cylinder-driven movement
• Automatic control by PLC according to production requirements
Heavy Winder
The heavy winder is designed for stable winding of large-diameter PET sheets, featuring an automatic length calculation system for precise roll management.
Key Features:
• Automatic winding length calculation system
• Two working positions for continuous production operation
• Servo motor drive for precise winding tension control
FAQ
Q1. Can this line produce food-grade recycled PET sheets?
A: Yes. ACERETECH rPET sheet extrusion line has achieved FDA certification and supports E to G grade recycled PET production for food-contact applications.
The final product quality depends on raw material quality, washing performance, sorting efficiency, and overall process control.
Q2. Can the production line process 100% recycled PET flakes?
A: Yes. ACERETECH rPET sheet extrusion line has achieved FDA certification and supports E to G grade recycled PET production for food-contact applications.
The final product quality depends on raw material quality, washing performance, sorting efficiency, and overall process control.
Q3. What is E to G grade recycled PET?
A: E to G grade is an FDA-recognized classification related to recycled PET materials used for food-contact applications.
It represents a high-quality recycled PET application level achieved through controlled recycling processes, purification technologies, and strict quality management.
Q4. Complete PET Recycling Solution from ACERETECH？
A: From PET bottle washing and flake preparation to FDA-certified E to G grade rPET sheet extrusion, ACERETECH provides complete PET recycling solutions for sustainable packaging production.
With advanced recycling technologies, reliable engineering design, and proven food-grade recycling capabilities, ACERETECH helps customers transform PET waste into high-value recycled materials and build sustainable circular economy solutions.
