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SJ25 Single-Screw Extruder
A compact, high-precision single-screw extruder engineered for R&D, pilot runs, and small-batch production. The SJ25 delivers stable melt quality, flexible screw configurations, and smart data acquisition to accelerate polymer compounding, profile extrusion, and formula scale-up.
SJ25 Single-Screw Extruder
Key Features
High-Precision Melt Control
- Closed-loop temperature control across multiple barrel zones for uniform plasticization and melt stability
- High-torque drive with fine speed resolution ensures consistent output at low throughputs
- Optimized screw geometry for efficient conveying, melting, mixing, and degassing
Broad Material Compatibility
- Processes PP, PE, PVC, ABS, PET, PA, PC, TPE/TPU, PLA/PBAT, and recycled polymers
- Supports filled and reinforced compounds: glass fiber, talc, CaCO3, flame-retardant systems
- Wear- and corrosion-resistant barrel/screw options for abrasive or reactive formulations
Modular, Easy-to-Scale Design
- Quick-change dies and split-barrel option for rapid cleaning and recipe changeovers
- Optional venting, screen changer, and side feeding for fillers and fibers
- Data logging of torque, melt pressure, temperature, and throughput enables DoE and robust scale-up
Energy-Efficient and Safe
- High-efficiency motor and thermal insulation reduce specific energy consumption
- Multi-level interlocks, over-torque protection, and emergency stop for operator safety
- Low-noise, small footprint ideal for labs and pilot lines
Popular keywords included: SJ25 single-screw extruder, polymer compounding, profile extrusion, lab-scale extruder, pilot extrusion line, precision melt control, masterbatch production, recycled plastics processing.
Applications
Building & Construction
- WPC and PVC profiles, sealing strips, cable ducts, conduit, weatherable compounds
- Flame-retardant and UV-stabilized materials validation for outdoor use
Furniture & Home
- Decorative profiles, edge banding, rigid/flexible PVC formulations
- Color and additive masterbatch trials for surface-critical parts
Automotive & Transportation
- Glass-fiber reinforced PP/PA compounds, impact-modified materials
- Low-VOC interior compounds, lightweighting development blends
Packaging & Consumer Goods
- Barrier materials trials (EVOH blends), PET and PCR PET optimization
- Color masterbatch, additive concentrates, bio-based packaging resins
Electronics & Industrial
- ESD/antistatic compounds, halogen-free flame-retardant materials
- Engineering plastics for connectors, housings, and wire/cable jacketing
Technical Specifications
Core Parameters
- Screw diameter: 25 mm (SJ25)
- L/D options: 25–33 (customizable for process window)
- Output capacity: 2–25 kg/h depending on polymer, die, and screw design
- Speed range: 10–200 rpm with high-torque gearbox for smooth low-rate extrusion
Temperature and Pressure
- Barrel heating zones: 3–5 independent zones
- Temperature range: 30–350 °C with ±0.5 °C stability
- Melt pressure: 0–50 MPa transducer with alarm/overpressure protection
Configuration Options
- Screw types: general-purpose, mixing, barrier, vented configurations
- Feeding: standard volumetric, optional gravimetric; side feeder for fillers/fibers
- Filtration: manual or hydraulic screen changer
- Dies & downstream: strand, sheet/tape, tube/profile; air/water cooling; strand or hot-face pelletizer
Power & Utilities
- Drive power: 3–7.5 kW per torque package
- Heating power: 3–6 kW with high-efficiency insulation
- Air supply: 0.6 MPa for pneumatic options
- Electrical: 380–480 V, 50/60 Hz, 3-phase (others on request)
Note: Final performance depends on formulation, screw/die selection, and process setup; configurations can be tailored to your application.
User Recognition
Customer Feedback Highlights
- “The SJ25 delivers production-grade stability at lab scale—ideal for DoE and rapid iteration.”
- “Changeovers are fast. Modular screws and quick-change dies cut our development time by 30%.”
- “Precise feeding and steady melt quality improved masterbatch color consistency from day one.”
Case Studies & Market Performance
- A specialty compounder increased R&D throughput by 25% using SJ25 with dual gravimetric feeders for color and additive masterbatch.
- An automotive supplier validated GF-PA66 on SJ25 and scaled parameters to a 75 mm line with minimal re-optimization.
- A WPC startup achieved 12 kg/h stable pelletizing with consistent strand quality, enabling reliable customer sampling.
Competitive Advantages
Innovation That Scales
- Lab-to-production parameter continuity shortens commissioning and reduces risk
- Integrated data acquisition enables traceable, data-driven optimization across materials
Lower Total Cost of Ownership
- Efficient power usage and quick-clean design reduce operating and downtime costs
- Hardened wear packages extend service life with abrasive fillers and fibers
Summary
The SJ25 Single-Screw Extruder is a compact yet powerful platform for polymer R&D, compounding, and profile extrusion. With precise melt control, broad material compatibility, and a modular architecture, it accelerates formulation, qualification, and scale-up—boosting lab productivity while lowering energy use and risk.
