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Parallel Twin Screw Sheet Extrusion Line
1. The extrusion of PET sheet directly adopts a combination of parallel, co-rotating twin screws and a Roots vacuum pump for forced vacuum degassing, replacing the traditional single screw paired with crystallization drying equipment. This setup offers high output and low energy consumption, making it suitable for the production and processing of recycled PET bottle flakes.
2. The screw is designed with a building block structure, allowing for adjustments to the screw assembly according to different materials. This flexibility enables the same equipment to process not only PLA/PBAT biodegradable materials and starch-based degradable materials into sheet extrusions but also to produce PET sheet extrusions.
3. The large opening vacuum cylinder combined with a two-stage Roots vacuum pump can achieve an ultimate vacuum degree of 10Pa, maximizing moisture removal and preventing melt degradation.
4. A melt gear pump is applied between the extruder and the T-die. It stabilizes the extrusion pressure, ensuring uniform thickness of the extruded sheet. The pressure sensor after the pump uses a high-precision imported sensor, aiding in the realization of closed-loop control for the equipment.
5. The equipment utilizes a PLC system to achieve fully automated operation and parameter setting controls throughout the line.
Non-crystallization dry PET or PLA Sheet Extrusion Production Line
Characteristic classification
PET Sheet Twin-Screw Extrusion Line (Vented, No Crystallization Drying)
Granuwel's innovative PET sheet extrusion line eliminates crystallization drying, reducing energy use while boosting efficiency. Key upgrades include a Roots-rotary vane vacuum system (≤10Pa) for superior degassing and a thin-walled alloy steel roller set for enhanced cooling, improving output, toughness, and transparency. The user-friendly PLC system ensures easy operation.
PLA Biodegradable Sheet Line
Processing plant-based PLA (170–230°C), this line produces fully biodegradable sheets with high transparency, gloss, and heat/UV resistance. Ideal for food packaging (fruits, baked goods) and eco-friendly hard containers, it combines biocompatibility with antimicrobial properties.
PBAT Eco-Friendly Sheet Line
Optimized for multi-layer sheets, this line integrates stone powder to lower costs and accelerate degradation while maintaining mechanical strength and processability.
Diversified Feeding System
The system facilitates the measurement and blending of various raw materials in a one-step process, achieving sheet coloring, modification, etc. This reduces labor costs, electricity costs, and enhances the competitiveness of the products.
Product features
Diversified Feeding System
Achieves the measurement and blending of various raw materials.
Building Block Type Twin Screw Barrel and Screw Elements
Flexibly and quickly adjust the barrel and screw structure according to different processes, optimizing mixing effects.
Forming Mold
The thickness and width of the forming mold are adjustable, meeting the requirements for producing a variety of product specifications.
Application fields
The four special applications of the underwater pelletizing system
There are four special applications that can only be handled by the underwater pelletizing system.
01
Vacuum Forming Sector
● Packaging applications including:
○ Food packaging
○ Toy/stationery/gift boxes
○ Hardware and fruit packaging
02
Antistatic Field
● Specialized packaging for:
○ Electronic components
○ Permanent conductive/antistatic films
○ Semiconductor films
03
Daily Life Applications
● Common uses in:
○ Blister packaging
○ Folding boxes
○ General packaging
○ Printing/card manufacturing
Beyond Expectations: Client Testimonials
Engineering Plastic
Granuwel proved to be a reliable partner when we needed a precision extruder under tight deadlines. Your attention to detail, proactive communication, and post-sales support (including on-site training) were invaluable. The machine’s stability and output quality have significantly boosted our productivity. We’re grateful and eager for repeat business!
Canada
PET Functional Masterbatch
Working with Granuwel has been a pleasure! Your team’s responsiveness, fast delivery, and commitment to quality stood out. The twin-screw extruder performed even better than we expected, meeting all our production needs with precision. We’d love to collaborate again—hopefully with even more competitive pricing next time!
Thailand
Biodegradable material pelletizing
Granuwel’s twin-screw extruder matches exactly what we envisioned—durable, efficient, and outperforming similar machines we’ve used from other suppliers. Your product’s market competitiveness is undeniable, and we’re excited for future upgrades!
USA
High-Filler Masterbatch
We sincerely appreciate Granuwel’s exceptional support throughout our project. From the initial planning stage, your technical team meticulously analyzed our requirements and proposed multiple customized solutions for our twin-screw extruder. During production, you kept us updated with real-time progress reports. After delivery, your engineers arrived promptly to install, debug, and provide thorough training for our operators. Such professionalism is rare, and we look forward to a long-term partnership!
Türkiye
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