High-Performance Reactive Extruder Solutions
Addressing your production pain points with precise, reliable, and scalable twin-screw reactive extrusion technology. Engineered for polymerization, compounding, and chemical modification.
20+ Years Experience
80+ Countries
ISO 9001 Certified
CE Certified
Addressing Your Reactive Extrusion Pain Points
We understand the challenges in reactive extrusion. Our solutions eliminate critical production issues.
Unstable Batch Purity
Precise temperature control (±1.5°C) and residence time management ensure consistent chemical reactions, eliminating batch-to-batch variability.
Compliance Risks
Built with food-grade and pharmaceutical-grade materials (SS316L optional), ensuring FDA, EU, and GMP compliance.
High Maintenance Costs
Self-cleaning screw designs and wear-resistant bimetallic barrels (HRC 60-65) extend service life by 40%.
Poor Multi-Component Adaptability
Modular screw and barrel configurations with 32:1 to 68:1 L/D ratios allow seamless adaptation to diverse formulas.
Cross-Contamination Risks
Advanced sealing systems and optimized purge designs prevent material buildup between runs.
Low Operation Reliability
Heavy-duty gearboxes with high torque ratings (T/A³ ≤ 8) and Siemens/ABB PLC controls ensure 99.5% uptime.
Reactive Extruders for Every Scale
From laboratory research to full-scale industrial production
R&D & Testing
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Laboratory Scale
Perfect for R&D, formula testing, and small-batch production. High precision with minimal material waste.
- Output: 0.5 – 15 kg/h
- Screw Diameter: 21.7 – 35.6 mm
- Motor: 4 – 22 kW
Pilot Production
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Intermediate Pilot Scale
Bridge the gap between lab and full production. Ideal for process optimization and semi-continuous manufacturing.
- Output: 20 – 200 kg/h
- Screw Diameter: 35.6 – 50.5 mm
- Motor: 22 – 55 kW
Mass Production
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Industrial Production
High-throughput, heavy-duty systems designed for continuous, large-scale reactive compounding and polymerization.
- Output: 300 – 3,250 kg/h
- Screw Diameter: 62.4 – 133 mm
- Motor: 55 – 500 kW
Complete Model Specifications
SHJ Series Co-Rotating Twin Screw Reactive Extruders
| Model | Screw Diameter (mm) | L/D Ratio | Screw Speed (RPM) | Motor Power (kW) | Torque Grade (T/A³) | Output (kg/h) |
|---|---|---|---|---|---|---|
| SHJ-20 | 21.7 | 32 – 68 | 400 – 600 | 4 | 5.8 | 0.5 – 15 |
| SHJ-30 | 30.0 | 32 – 68 | 400 – 600 | 11 | 5.8 | 5 – 50 |
| SHJ-36 | 35.6 | 32 – 68 | 500 – 800 | 15 – 22 | 5.7 | 20 – 80 |
| SHJ-42 | 41.2 | 32 – 68 | 500 – 800 | 22 – 37 | 5.7 | 50 – 120 |
| SHJ-50 | 50.5 | 32 – 68 | 500 – 800 | 37 – 55 | 5.8 | 80 – 200 |
| SHJ-63 | 62.4 | 32 – 68 | 500 – 800 | 55 – 90 | 5.8 | 150 – 350 |
| SHJ-72 | 71.0 | 32 – 68 | 500 – 800 | 90 – 160 | 5.7 | 300 – 600 |
| SHJ-85 | 82.0 | 32 – 68 | 500 – 600 | 160 – 200 | 5.7 | 600 – 1000 |
| SHJ-92 | 91.0 | 32 – 68 | 500 – 600 | 250 | 5.8 | 840 – 1600 |
| SHJ-135 | 133.0 | 32 – 68 | 650 – 750 | 400 – 500 | 5.8 | 1950 – 3250 |
Note: All models support customizable L/D ratios (32:1 to 68:1), Siemens/ABB PLC control systems, and bimetallic or SS316L barrel materials. Contact us for exact configurations based on your reactive process requirements.
Technical Advantages
Engineered with cutting-edge technology for superior performance in reactive polymer processing
High Torque Density
T/A³ ≤ 8 torque rating enables processing of high-viscosity materials with stable operation under heavy loads.
Precise Temperature Control
Multi-zone barrel heating/cooling with ±1.5°C accuracy ensures optimal reaction kinetics and prevents thermal degradation.
Flexible L/D Configurations
Modular design with L/D ratios from 32:1 to 68:1 allows customization for specific residence time requirements.
Superior Mixing
Co-rotating intermeshing twin screws with optimized kneading blocks ensure homogeneous dispersion and reaction completion.
Advanced Devolatilization
Multiple vacuum ports with efficient venting systems remove volatiles and by-products, driving reactions to completion.
Industrial Safety
CE, ISO9001, SGS certified with emergency stops, overload protection, and temperature alarms for operator safety.
Applications & Industries
Trusted across diverse industries for polymer synthesis, modification, and compounding
Thermoplastic Polyurethane (TPU)
Reactive synthesis with precise hardness control for automotive, footwear, and medical applications.
Biodegradable Polymers
Production of PLA, PBAT, PBS with controlled molecular weight for sustainable packaging solutions.
Engineering Plastics
Modification of PA, PC, PBT with fillers and reinforcements for automotive and electronics industries.
Reactive Masterbatches
High-concentration color, additive, and functional masterbatches with superior dispersion quality.
Polymer Grafting
Maleic anhydride grafting, silane crosslinking, and other functionalization reactions for enhanced properties.
Nanocomposites
Uniform dispersion of nanoparticles (clay, carbon nanotubes, graphene) in polymer matrices.
Reactive Extrusion vs Batch Processing
Why continuous reactive extrusion outperforms conventional batch reactors
| Feature | UET Reactive Extruder | Traditional Batch Reactor |
|---|---|---|
| Processing Time | Continuous – 5-10 min residence time | Batch cycles – 2-8 hours per batch |
| Energy Efficiency | 30-40% lower energy consumption | Higher energy use for heating/cooling cycles |
| Product Consistency | Excellent – continuous process control | Variable – batch-to-batch differences |
| Solvent Usage | Solvent-free or minimal solvent | Large solvent volumes required |
| Environmental Impact | Lower waste, no solvent recovery needed | High waste generation, solvent recovery |
| Scalability | Easy scale-up from lab to production | Complex scale-up, different kinetics |
How Reactive Extrusion Works
Four key stages transform raw materials into high-performance polymers
1
Precise Feeding
Gravimetric feeders accurately introduce monomers, polymers, catalysts, and additives
2
Melting & Mixing
Twin screws create high shear and temperature zones for melting and initiating reactions
3
Reaction & Venting
Controlled residence time with vacuum ports remove volatiles and by-products
4
Extrusion & Pelletizing
Homogeneous melt is pumped through die and pelletized for consistent granules
Factory & Manufacturing Excellence
State-of-the-art manufacturing facilities with strict quality control and international certifications
Advanced Manufacturing
20,000+ sqm production facility equipped with CNC machining centers, precision grinding equipment, and automated assembly lines for consistent quality.
Quality Control
Comprehensive testing laboratory with material analysis, performance testing, and quality inspection at every production stage to ensure ISO 9001 compliance.
R&D Capability
Dedicated R&D center with pilot-scale extruders for customer material testing, formula optimization, and continuous innovation in extrusion technology.
ISO 9001
CE
SGS
BV
What Our Customers Say
Trusted by manufacturers worldwide for reliable reactive extrusion solutions and exceptional after-sales support
“We switched from batch reactors to UET’s SHJ-92 for our PLA and PBAT production. The results were immediate — 35% energy savings, zero solvent waste, and our molecular weight distribution is now incredibly consistent. The modular screw design allowed us to quickly adapt to different biodegradable formulations. Best investment we’ve made in 10 years.”
“We purchased the SHJ-63 reactive extruder for our TPU production line. The temperature precision is outstanding — we achieved ±1°C consistency across all zones, which significantly improved our product quality. The technical team provided excellent support during installation and formula optimization. Highly recommended for serious polymer manufacturers.”
“We run two SHJ-72 extruders for PA6 and PC modification with glass fiber reinforcement. The high torque density handles our 40% filler loading without any issues. What impressed us most was the after-sales service — their engineers visited our facility in Mumbai for commissioning and trained our team thoroughly. Machine uptime is above 98%.”
Related Extruder Solutions
Explore our complete range of extrusion equipment for various applications
Frequently Asked Questions
Common questions about reactive extrusion and UET Machine products
A reactive extruder is a specialized twin-screw extrusion system designed to perform chemical reactions (such as polymerization, grafting, cross-linking, or compounding) simultaneously with the melting and mixing of polymers. Unlike standard extrusion which only melts and shapes materials, reactive extrusion combines chemical synthesis and processing in a single continuous operation, offering superior efficiency, better product consistency, and reduced environmental impact compared to traditional batch reactors.
Reactive extrusion offers several key advantages: 1) Continuous processing eliminates batch-to-batch variability; 2) 30-40% lower energy consumption; 3) Solvent-free or minimal solvent usage; 4) Faster processing times (minutes vs. hours); 5) Better heat and mass transfer; 6) Precise control over residence time and reaction conditions; 7) Significantly reduced waste generation; 8) Easier scalability from lab to production; 9) Smaller equipment footprint; and 10) Lower labor requirements due to automation.
Our reactive extruders are highly versatile and can process a wide range of materials including: Thermoplastic polyurethanes (TPU), biodegradable polymers (PLA, PBAT, PBS), engineering plastics (PA, PC, PBT, ABS), polyolefins (PP, PE), PVC, reactive masterbatches, polymer blends, nanocomposites, grafted copolymers, and recycled plastics. The modular screw design and precise temperature control allow us to optimize the system for your specific material requirements.
Yes! We have a fully equipped laboratory and pilot-scale testing center. You can send your raw materials to us, and our engineers will conduct trials to optimize screw design, temperature profiles, and process parameters specifically for your formula. We provide detailed test reports including output rates, energy consumption, product quality analysis, and recommended machine configuration. This ensures the equipment we deliver will meet your exact production requirements.
To provide an accurate quotation, we need: 1) Target output capacity (kg/h); 2) Materials to be processed (specific polymer types and formulations); 3) Type of reactive process (polymerization, grafting, compounding, etc.); 4) Desired final product specifications; 5) Available facility space and utilities; 6) Any special requirements (explosion-proof, food-grade, etc.); and 7) Your location for shipping cost calculation. With this information, we can recommend the optimal model and configuration within 2 hours.
All UET reactive extruders come with a comprehensive warranty: 1-year整机 warranty and 24-month warranty for core components (screws, barrels, gearbox). We provide free maintenance services and replacement of faulty parts during the warranty period. Our after-sales support includes: 24/7 technical hotline, remote troubleshooting via video call, on-site installation and commissioning support, operator training programs, lifelong maintenance consulting, and readily available spare parts. We have service partners in multiple countries to ensure rapid response to your needs.