SJ25 Single-Screw Extruder

SJ25 Single-Screw Extruder

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.