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.

Over the past more than ten years, MKPL has been known as a professional manufacturer of advanced extruder production line. We are a professional supplier of compounding and modification extruders., with hundreds of extruder production lines running in the world, perfect and effective service network and experienced team of processing engineers and well-equipped process laboratories.

Since 1999, the market share of MKPL twin screw extruder has steadily increased. Our extruders have been sold and installed in Asia for more than a decade. We are very close to our customers through our subsidiaries in Taiwan and Nanjing through our perfect proxy network.

Based on our rich experience and expertise, we have manufactured TSE series twin screw extruders. Adopting the concept of German engineering design and meeting the high standard of Chinese purchasing and assembling, this extruder not only maintains high quality standards, but also meets the special needs of the Asian market. Therefore, we have opened our supplying and service window to more customers in

the plastic processing industry in Asia.

Nanjing MKPL Global Service

Experienced experts provide professional services to global customers. Nanjing Technology Laboratory provides production-related environment where customers can conduct product development and testing. In Nanjing MKPL Maintenance Center, screw and barrel can be quickly repaired or thoroughly inspected, which is economical and reduces downtime. Nanjing Branch of China and Taiwan Company can provide professional first-class Chinese and English services and training.