Biodegradable PLA PBAT PHA Underwater Film Pelletizing Machine For Plastic Recycling

Underwater Pelletizer

An underwater pelletizing system, also known as an underwater pelletizer, is a high-efficiency plastic pelletizing machine designed for precise and continuous production of polymer pellets. This advanced pelletizing technology is widely used in polymer compounding, masterbatch production, chemical pelletizing, biodegradable plastics, and high-viscosity materials. With stable cutting performance and excellent pellet shape consistency, the underwater pelletizer is ideal for medium and large-scale industrial applications.

The system works by cutting molten polymer directly at the die face while submerged in water. The water flow cools, solidifies, and transports the pellets to a centrifugal dryer, ensuring uniform pellet size and excellent surface quality. This makes the underwater pelletizing system suitable for PP, PE, PET, TPU, PA, EVA, PLA, PBAT, and high-melt-index materials.

Applications of the Underwater Pelletizer

Polymer Compounding: PE, PP, ABS, TPU, TPE, PA, and engineering plastics.

Biodegradable Plastics: PLA, PBAT, PHA, starch-based polymers.

Masterbatch Production: color masterbatch, filler masterbatch, functional additives.

Chemical and Resin Production: hot-melt adhesives, elastomers, reactive polymers.

High-MFI Materials: suitable for materials that cannot be pelletized using strand or water-ring systems.

 Technical Specifications

These specifications allow the underwater pelletizer to provide high output, precise pellet cutting, and excellent thermal control, ensuring stability for complex and high-performance polymers.

Key Advantages

Uniform pellet shape with smooth surface and precise size control.

Wide material compatibility, especially for sticky or high-MFI polymers.

Energy-efficient closed-loop water system reduces operating cost.

Fully automatic operation with intelligent PLC temperature and pressure control.

Low maintenance design with wear-resistant die plates and long-life cutting blades.

High output stability suitable for continuous 24/7 industrial production.

FAQ

Q1: What materials are best suited for underwater pelletizing?
Polyolefins, biodegradable plastics, elastomers, engineering plastics, and high-viscosity polymers.

Q2: Can the pelletizing system be customized?
Yes. Die plate design, water system size, pelletizing chamber, and dryer capacity can all be tailored.

Q3: Is underwater pelletizing better than strand pelletizing?
Yes, especially for sticky materials or high-MFI resins that cannot form stable strands.

After-Sales Service

We offer on-site installation, operator training, spare parts supply, remote diagnostics, 24/7 technical support, and lifetime maintenance consulting to ensure your underwater pelletizing system runs reliably and efficiently.