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china underwater pelletizer system manufacturer — Granuwel
Underwater pelletizers are specialized equipment used for the granulation of polymers and thermoplastics, capable of producing uniformly shaped, high-quality pellets.
These underwater pelletizers utilize a unique underwater environment to cut molten plastic into pellets of the desired size through high-speed rotating blades. This process is completed in water, effectively preventing oxidation or rapid cooling of the molten plastic when it comes into contact with air, ensuring the quality of the final product.
The machine consists of major components such as a melt pump, filter, startup valve, die head, main body of the pelletizer, water circulation system, and dehydration system, enabling highly automated, efficient continuous production.
underwater pelletizing system Features
Underwater pelletizers are characterized by their wide application range, high production capacity, precise particle size control, unique cooling method, and strong adaptability. Details are as follows:
Wide application range
Ideal for most plastic polymers, especially softer or high-viscosity materials like EVA, TPU, and TPE, making it a top choice for high-performance material production.
High production capacity
Equipped with an efficient water cooling and dehydration system, enabling much higher output than other pelletizers for large-scale production.
Precise particle size control
Excels in producing a wide range of sizes, particularly particles ≤1mm, offering versatility from micro to large granules.
Efficient Cooling Method
Water cooling ensures rapid, uniform cooling while minimizing oxidation, preserving product quality.
Superior Particle Quality
Produces oval or spherical pellets with excellent flowability, enhancing market competitiveness.
Unique cooling method
Underwater pelletizers use water as the cooling medium, which not only enables uniform and rapid cooling of the particles but also reduces contact between molten plastic and air, lowering the risk of oxidation and degradation, and ensuring product quality.
Strong adaptability
Particles made by underwater pelletizers have an aesthetically pleasing appearance, being oval or spherical, which improves particle flowability. This enhancement in appearance and flowability further increases the product's market competitiveness and applicability.
4 Key Applications of Underwater Pelletizing Systems
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
Producing Circular Granules (≤1mm Diameter)
○ Ideal for high-concentration masterbatch preparation.
○ Ultra-fine particles improve dispersion, reducing/eliminating the need for dispersing agents.
○ Dust-free, easy to handle and measure.
02
High Throughput (Up to 5 tons/hour)
○ Other pelletizing systems struggle beyond 1,000 kg/h.
○ Unmatched efficiency for large-scale production.
03
Processing Soft Materials (Hardness < Shore A40)
○ Essential for TPE, TPV, EVA, hot melt adhesives, and other soft polymers.
○ Only underwater pelletizing can achieve consistent results.
04
Polymer Synthesis & Reaction Processing
○ Enables polymerization, reactive extrusion, and liquid-to-granule conversion.
○ Critical for advanced material production.
General Applications
01
Filled modification
02
Color masterbatches
03
Thermoplastic Elastomers
04
EVA Hot Melt Adhesives
01
Filled modification
Such as PE, PP, PS, EVA + calcium carbonate CaCO3, talcum powder Talc, titanium dioxide TiO2, carbon black, etc.
02
Color masterbatches
Such as PE, PP, PS, ABS, EVA, PET + pigments and additives.
03
Various thermoplastic elastomers
TPE, TPR, TPU, TPV and other thermoplastic elastomers.
04
EVA hot melt adhesives, etc.
Product specification
| Model | Steering Gear | Hole number | Blade Number | Tool Movement | Output |
| UWP30 | D30 type | 8~10 | 4~6 | Pneumatic feed | 50~300kg/h |
| UWP50 | D40 type | 20~30 | 6~8 | Pneumatic feed | 200~700kg/h |
| UWP100 | D50 type | 40~80 | 8~12 | Pneumatic feed | 2tons/h |
| UWP200 | D60 type | 100~160 | 10~16 | Pneumatic feed | 2~6tons/h |
| UWP400 | D60 type | 100~160 | 12~18 | Pneumatic feed | 3~8tons/h |
Beyond Expectations: Client Testimonials
TPU Granulation in Polymerization Process
Working with Granuwel on our twin-screw extrusion and pelletizing system has been a game-changer for our production line. Their engineers delivered a customized solution that perfectly handles our TPU Granulation in Polymerization Process.
India
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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