SWT-75s Parallel Twin-Screw PET Sheet Extrusion Line
SIVITE Parallel Twin-Screw PET extrusion line: APET, CPET, PETG, rPET sheets. High transparency, excellent stretch and toughness for thermoforming. Custom configurations available.
- Delivery Time: 1–2 months after confirmation of the deposit.
- Price terms: FOB, EXW, CFR, CIF, etc.
- Payment methods: T/T (wire transfer), Visa, PayPal, Alipay, etc.
What is Pet Sheet Extrusion Line？
A PET sheet extrusion line melts PET pellets into a uniform melt via screw extrusion, then passes it through a flat die to form a continuous sheet. The sheet is rapidly cooled on polishing rolls, trimmed to width, and pulled by a haul-off unit under controlled tension. Finally, it is cut or wound into finished rolls. An integrated PLC system ensures precise thickness control and consistent quality, delivering high-performance sheets for packaging, printing, and thermoforming applications.
What are the applications of PET sheets?
1. Basic PET Sheets
APET: Highly transparent and easy to thermoform; used for food blister packaging, toy and gift packaging, etc.
PETG: Offers superior toughness and chemical resistance; suitable for furniture surfacing, medical device packaging, electronic product housings, etc.
RPET: Made from recycled material; eco-friendly; used for hardware packaging, garment tags, etc.
2. Multi-layer Composite PET Sheets (High-filler Co-extrusion Process)
APET/PETG or PETG/APET/PETG: Combines the advantages of each layer; suitable for high-standard food packaging and printed materials.
APET/RPET/APET: Outer APET layers maintain aesthetic appeal, while the middle layer utilizes recycled material to reduce costs; suitable for eco-friendly packaging.
3. Specialty PET Sheets
CPET (Crystalline PET): High-temperature resistant; used for thermoformed products such as microwaveable food containers.
Optical-grade PET Sheets: High transparency and low haze; used for LCD light guide plates, optical lenses, etc.
3D Sheets: Produced via vertical roller forming; used for three-dimensional packaging or decorative materials.
PET Sheet Extrusion Line Working Principle
This PET sheet extrusion line consists of eight components; each performs its specific function and integrates seamlessly to meet the requirements for precise, high-efficiency production.
The PET sheet extrusion line centers on an extrusion screw that melts and plasticizes PET raw material, forming a uniform melt curtain through the extrusion die. The melt enters a three-roll calender, where it is cooled and shaped under precise temperature control to ensure uniform thickness and a smooth surface finish. After shaping, the sheet undergoes real-time thickness monitoring and feedback adjustment, followed by surface treatment in a silicone coating unit and curing in a multi-stage drying oven. Finally, the sheet passes through a tension-buffering accumulator before being neatly wound by a winder; the entire process is managed by an automated control system to ensure high-speed, stable production.
What are the core components?
Each component plays an irreplaceable role; continuous production—while ensuring stable product quality—is achievable only through their coordinated operation. However, depending on specific PET sheet production requirements, certain functional components may be omitted.
Comparison of PET Sheet Extrusion Solutions
There are four mainstream configuration options in the PET sheet extrusion market, each catering to specific production requirements and material types: single-screw, twin-screw, planetary screw, and multi-layer co-extrusion systems. Understanding the distinct characteristics of these technologies is crucial for selecting the appropriate production line configuration.
A cost-effective entry-level solution with a straightforward design and easy maintenance. It operates reliably for standard PET sheets in the 0.15–2 mm thickness range, but requires intensive drying and crystallization pretreatment. Mixing efficiency is limited, making it less suitable for recycled or highly filled feeds.
Available in co-rotating and counter-rotating versions. Co-rotating types deliver high shear for compounding filled, flame-retardant, or glass-fiber-reinforced PET, while counter-rotating models provide stable conveyance for high-viscosity grades. Their intermeshing screw geometry ensures superior homogenization and melting, accommodating complex formulations.
Employs two or more extruders to produce ABA, ABC, or five-layer structures. This approach combines functional layers such as barrier resins (EVOH) or recycled cores (rPET) between virgin skin layers, optimizing both performance and material cost. Typical configurations include PET/EVOH/PET for oxygen-sensitive foods and PET/rPET/PET for sustainable packaging.
4. Planetary Screw Sheet Extruder
This equipment features a configuration comprising a central main screw and nine planetary satellite screws, enabling powerful yet low-shear mixing. This design facilitates low-temperature extrusion and minimizes material degradation, making it an ideal choice for high-end applications—capable of producing highly transparent, high-toughness sheets even when using recycled resin.
Sheet extrusion Machine Parameters
| Model | Adaptive material | Screw form | Specifications(mm) | Sheet thickness(mm) | Sheet width(mm) | Extrusion volume(kg/h) |
|---|---|---|---|---|---|---|
| SWT-120D | PET、PP、PS... | Single screw | φ120 | 0.2~2.0 | ≤800 | 400~600 |
| SWT-130D | PET、PP、PS... | φ130 | 0.2~2.0 | ≤800 | 600~900 | |
| SWT-150D | PET、PP、PS... | φ150 | 0.2~2.0 | ≤800 | 800~1000 |
| Model | Adaptive material | Screw form | Specifications(mm) | Sheet thickness(mm) | Sheet width(mm) | Extrusion volume |
|---|---|---|---|---|---|---|
| SWT-75S | PET,PP,PS,PLA... | Building Block Type | φ75 | 0.2~2.0 （mm） | ≤800（mm） | 450~650（kg/h） |
| SWT-85S | PET,PP,PS,PLA... | φ85 | 0.2~2.0 （mm） | ≤1000（mm） | 600~900（kg/h） | |
| SWT-95S | PET,PP,PS,PLA... | φ95 | 0.2~2.0 （mm） | ≤950（mm） | 800~1200（kg/h） | |
| Model | Adaptive material | Screw structure | Specifications(mm) | Thickness(mm) | Width(mm) | Extrusion Volume(kg/h) |
|---|---|---|---|---|---|---|
| SWT-75S+65 | PET,PLA,PP,PS,PE,PC.... | Twin-screw three-layer co-extrusion | φ75+φ65 | 0.15~2.0 | ≤1200 | 500~800 |
| SWT-85S+65 | PET,PLA,PP,PS,PE,PC.... | φ85+φ65 | 0.15~2.0 | ≤1200 | 700~1000 | |
| SWT-120+65 | PET,PLA,PP,PS,PE,PC.... | φ120+φ100 | 0.15~2.0 | ≤1200 | 450~750 | |
| SWT-75S+100+65 | PET,PLA,PP,PS,PE,PC.... | Three-screw five-layer co-extrusion | φ75+φ120+φ65 | 0.15~2.0 | ≤1200 | 700~1200 |
Key Advantages and Features of SIVITE Sheet Extruders
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Inquiry For A Solution:
EXPORTED TO OVER 30 COUNTRIES WORLDWIDE
EVERYONE IS ASKING
Are you a factory or trading company?
We are factory. Multiple Production Bases Worldwide(Guangdong Sivite Intelligent Manufacturing Co., Ltd.)
How does your factory do regarding quality control?
We have a special QC department in charge of products’quality.
How long is the warranty period?
All of our machine have one year warranty.
What's the main market of your company?
We have customers all over the world.Now our products have been widely used in 60 countries.
Can we visit your machine operation in your factory?
Yes, we have many customers near our factory .we can take you to see the machine operation.
Where is your factory located? How can we visit there?
Our factory is located in Dongguan City, Guangdong Province, China, by high speed train to Guangzhou or Shenzhen station,then 1 hour by car.we provide free pick-up service from train station and airport.
Which payment can offer?
We accept 30% payment in advance, the balance payment before shipping.We also accept UC according to the order amount.We can accept the payment by TIT, Western Union, Paypal, Private Account, Escrow,Cash,and others.
When can I get the price?
Email us your inquiry or communicate online, state your specifications(product, material, size, quantity,output etc).We usually quote within 24 hours. Please call us or inform in your email when it is urgent, we will regard your inquiry priority.our service number is 0086-13318438808
