Technical Research Suzhou JWELL PET Sheet High-Efficiency And Energy-Saving Extrusion Line

Raw Materials
• PET (polyethylene terephthalate) is a common plastic that can be categorized based on its applications and properties. Key classifications include:

• APET (amorphous PET): Features excellent clarity and gloss, commonly used in food packaging and blister packaging.

• RPET (recycled PET): Made from recycled PET, it is environmentally friendly and commonly used in bottles and containers.

• PETG (modified PET): Adds other ingredients for improved toughness and thermoforming properties, commonly used in medical devices and electronics. PET can also be further categorized based on different production processes and applications.

Detailed Explanation:
1. APET (Amorphous PET):
• Features: Transparency, good gloss, and easy processing, but relatively weak heat and impact resistance.
• Applications: Primarily used in food packaging, such as beverage bottles and food boxes, and blister packaging, such as blisters and trays.
2. RPET (recycled PET):
• Features: Made from recycled PET bottle flakes or scrap, it is environmentally friendly and can reduce the demand for virgin PET.

• Applications: Can be used to manufacture a variety of PET products, such as new bottles, containers, and packaging materials.
3. PETG (PET Glycol-modified):
• Features: PET is based on PET and contains additional components, resulting in improved toughness and heat resistance, while also facilitating thermoforming.
• Applications: Commonly used in medical devices, electronic products, display racks, labels, and packaging materials requiring higher performance.

Other Classifications:
By Production Process: PET can be categorized into injection molding grade, blow molding grade, and fiber grade, each corresponding to different processing methods and application areas.
By Application: PET can be categorized into packaging grade, fiber grade, and engineering plastic grade, each corresponding to different performance requirements and application scenarios.
In short, PET comes in a variety of types, and choosing the right PET material depends on the specific application requirements.

PET clear sheet is a transparent plastic sheet made from polyethylene terephthalate (PET) resin. PET resin is a common plastic material known for its high temperature resistance, chemical resistance and excellent mechanical strength.PET sheet is a thermoplastic and environmentally friendly plastic product with high transparency, non-toxic and odourless, health and safety features, and can be directly used for food packaging. It has excellent physical and mechanical properties over a wide range, good electrical insulation, resistance to oil and grease, acids and alkalis, and low gas and water vapour permeability.

According to different raw materials and product applications, Suzhou Jwell has developed different extrusion systems such as single screw, twin screw, single and twin screw co-extrusion to meet different market application requirem.

The current measured output of CJWS95 twin-screw extruder can reach 1500kg/h

The current measured output of 150 single-screw extruder can reach 1700kg/h

JWELL Single Screw vs. Twin Screw Extruder for PET Sheet

JWELL Single Screw Extruder for PET Sheet

JWELL Twin Screw Extruder for PET Sheet

1. Automatic Adjustment, Precise Thickness Control 

• Equipped with electric or thermal bolt adjustment mechanisms and linked with online thickness gauge to ensure real-time thickness correction.

2. Polished Flow Channel, Optimized for PET Melt

• Mirror-polished internal channels reduce melt residence time and degradation, ensuring sheet clarity and smoothness

3. Excellent Thermal Uniformity, No Dead Zones

• Multi-zone heating ensures die lip temperature difference is within ±1°C, enhancing sheet uniformity.

4. Fast Process Adjustments, Reduced Downtime

• Allows quick format switching for varying sheet thickness and width, improving line flexibility and reducing downtime.

5. Compatible with Multilayer Co-Extrusion

• Supports co-extrusion of A-B, A-B-A or more complex multilayer PET sheets with uniform distribution.

6. Made with High-Strength Alloy, Durable and Corrosion-Resistant

• Constructed with high-grade die steel with heat and nitriding treatment, resistant to thermal and chemical stress with long service life.

7. Seamless Integration with JWELL Extrusion Line Controls

• Fully compatible with JWELL's PLC/HMI system for integrated control of die, extruder, and thickness gauge.

Applicable PET Products
Highly transparent food-grade PET sheet (APET)
RPET sheet containing recycled materials
Co-extruded functional films (such as anti-fog, anti-static, and barrier films)
Medical trays, blister sheets, etc.

1. High-Precision Three-Roller Structure

• Equipped with polished upper, middle, and lower rollers, arranged in vertical, inclined, or horizontal configuration to meet diverse process requirements.

2. Stable Sheet Thickness Control

• Fine-tuned roller gap control (±0.01mm) and integrated thickness gauge ensure consistent thickness and excellent flatness.

3. Excellent Sheet Gloss and Surface Quality

• Rollers are chrome-plated and precisely ground for excellent clarity and gloss, free from flow marks, bubbles, or crystal spots.

4. Efficient Cooling System

• Internal spiral water or oil circulation system controls roller temperature within ±1°C for uniform cooling and stress-free sheet.

5. Advanced Tension Control & Synchronized Drive

• Independent servo motors drive each roller with precise tension control to avoid wrinkles and misalignment, improving yield.

6. Quick Lifting & Die Adjustment System

• Quick lift of center roller and flexible die-to-roller distance adjustment for faster startup and easier cleaning/changeover.

7. Modular Design, Compatible with Various Sheet Types

• Supports single-layer or multilayer co-extrusion; suitable for APET, PETG, RPET, and more.

8. Seamless Integration with Full Line Automation

• Integrated with extruder, die, and thickness gauge via PLC/HMI for smart operation and recipe management.

1. High-Precision Measurement 

• Uses infrared/laser or beta-ray online thickness gauge, with thickness tolerance controlled within ±0.003mm, ensuring consistent sheet thickness.

2. Real-Time Monitoring and Feedback Control

• Integrates with PLC system to collect real-time thickness data and send feedback to the extruder for closed-loop control of screw speed and die gap.

3. Improves Yield and Reduces Waste

• The automatic system reduces human error and minimizes defective products and edge trimming caused by thickness deviation.

4. Data Visualization and Historical Analysis

• Equipped with HMI or IPC to display thickness curves and export historical data for quality traceability and process optimization.

5. Compatible with Multi-Layer Sheet Structures

• Supports single-layer, double-layer, or multi-layer co-extruded PET sheets, automatically recognizing individual layer thicknesses.

6. Energy Saving and Efficiency Enhancement

• Precise thickness control reduces over-extrusion, saving raw materials and enhancing overall line efficiency.

7. Stable System with Easy Maintenance

• JWELL uses international brand sensors that ensure system stability and easy maintenance with accessible spare parts.

1. Uniform and Stable Coating

• Utilizes precise micro gravure roller or comma bar coating to achieve uniform, consistent silicone oil layers without streaks or skips.

2. Highly Automated Control System

• Integrated with JWELL's proprietary PLC system for automatic control of coating speed, thickness, and fluid ratios.

3. Inline Coating, Saves Labor and Time

• Positioned inline at the end of the sheet line to avoid material transfer, contamination, and static issues-improving efficiency.

4. Efficient Hot Air Drying System

• Multi-zone adjustable hot air dryer ensures fast curing and drying of silicone oil without stickiness or residue.

5.Single or Double-Sided Coating

• Supports single-sided or double-sided coating according to customer needs, ideal for various applications.

6.Energy-Saving and Environmentally Friendly

• Features heat recovery and exhaust treatment systems to reduce energy use and VOC emissions in compliance with environmental regulations.

7.Optional Inline Inspection System

• Optional inline thickness gauges and CCD vision systems ensure traceable quality control.

8. Compatible with Various PET Substrates

• Suitable for APET, PETG, RPET, and other PET substrates with broad thickness range and application flexibility.

Applications

• Release film

• Medical blister sheet

• Label base film

• Anti-adhesive protective film

• Electronic packaging film

1. Non-Stop Continuous Winding

• Four winding stations rotate continuously, allowing non-stop reel changeover, greatly improving production efficiency.

2. Precise Tension Control

• Equipped with servo motors and closed-loop tension control to maintain consistent tension across varying reel diameters, ensuring flat, deformation-free sheet winding.

3. Independent Floor-Type Design, Flexible Installation

• Floor-type independent design allows flexible integration with various line widths and facilitates easier maintenance and plant layout.

4. Multiple Winding Modes Available

• Supports center winding, surface winding, or hybrid modes for various PET sheet thicknesses and applications.

5. User-Friendly Operation with High Automation

• Touchscreen interface with automatic length counting, reel changeover, cutting, and labeling, reducing labor intensity.

6. Neat Winding and Clean Edges

• Integrated edge position control (EPC) and pressure balancing system ensure neat, wrinkle-free winding with smooth edges.

7. Designed for High-Speed, High-Output PET Sheet Lines

•  Supports winding speeds up to 80–120 m/min, perfectly matched to JWELL high-speed single or twin screw PET sheet extrusion lines.

•  Winding diameter can be 1500mm

1.Advanced Technology with Rich Experience

•  JWELL has over 25 years of experience in plastic extrusion machinery, with hundreds of PET sheet lines running worldwide.

2. Complete Range of Solutions

• Offers solutions ranging from single-screw with drying system to dehumidification-free twin-screw systems, fitting various budgets and production capacities.

3. High Automation, User-Friendly Operation

• Integrated with PLC control, auto thickness gauge, auto winding, silicone oil coating, and anti-static systems for smart and easy operation.

4. Energy-Efficient and Environmentally Friendly

• Twin-screw models save up to 30% energy with no drying required, and the full line complies with CE/UL and environmental standards.

5.Supports Various Sheet Structures and Materials

• Compatible with APET, PETG, RPET, and supports single or multilayer (A-B, A-B-A) co-extrusion.

6. Global Service Network with Fast Support

• JWELL has service centers and subsidiaries in China, Southeast Asia, India, Turkey, and Latin America, providing fast technical support worldwide.

7. Strong Customization and Proven Projects

· Customizable for width, thickness, and functional modules like silicone coating, anti-static, film lamination, with many successful global references.

8. Reliable Quality with World-Class Components

· Uses top-tier brands like Siemens, ABB, Schneider, NDC, and Scantech to ensure long-term reliability and stability.

Choosing JWELL means getting:

High Output + High Stability + Smart Automation + Low Energy Consumption + Global Service