What are the Key Features of the FCT 6th Generation Spinneret Pack?

The hollow fiber membrane industry for water purification and wastewater treatment relies on stable, efficient NIPS wet spinning. Trustech’s FCT 6th Generation Spinneret is the core forming component designed specifically for wet-process NIPS. Building on Gen5 strengths—independent spinneret core, pinless structure, and high-precision forming—Gen6 adds structural innovations for multi-hole expansion and per-hole independent control, supporting 8, 12, 16-hole configurations. During spinning, each hole’s dope (membrane-forming feed) and bore fluid (lumen-forming) can be switched on/off and regulated independently, eliminating the traditional pain point of “entire line stoppage due to a single-hole failure.” This is particularly valuable under unstable materials or large process fluctuations, boosting productivity, reducing waste and labor costs, and enabling large-scale manufacturing.

Key Innovations in the FCT 6th Generation Spin Pack Technology

• Enhanced flow field and fluid dynamics: Internal flow paths are optimized for uniform distribution of dope and bore fluid to each hole, minimizing pressure drop differentials and improving inter-hole consistency.
• Per-hole independence: Individual metering, on/off, and fine regulation for both dope and bore fluid per hole, enabling quick isolation of an abnormal capillary without halting the full line.
• Modular, independent spinneret core: Fast Change Technology (FCT) allows rapid core replacement and maintenance, shortening downtime and supporting flexible spec changes (8/12/16 holes).
• Pinless, high-precision forming: The pinless design reduces defect sources and improves coaxiality and dimensional stability of outer diameter and wall thickness.

Material Durability: Evaluating the Components of the Spin Pack

Components exposed to solvent/non-solvent systems, pressure, and temperature cycling—such as the spinneret housing, distribution plates, and filtration elements—use corrosion-resistant, high-stability materials. Selecting advanced alloys and compatible polymers extends service life and maintains surface finish critical for precision forming. Routine assessments for material fatigue, seal integrity, and surface cleanliness help prevent drift in pore structure and lumen quality and minimize unplanned downtime.

Tip:

Align material choices with solvent system and coagulation bath chemistry; verify compatibility with cleaning agents and CIP/SIP practices.

Performance Metrics: Comparison with Previous Generations

Compared to conventional spinneret , FCT Gen6 typically demonstrates:

• Higher inter-hole consistency: reduced variability in OD, ID, and wall thickness due to balanced distribution and per-hole control;
• Faster recovery from upsets: isolate and adjust a single hole without stopping the entire line, cutting scrap and restart losses;
• Improved energy and time efficiency: quicker core changes and lower downtime through FCT modularity;
• More stable skin-layer formation: smoother coordination of dope/bore delivery with NIPS entry conditions, supporting tighter pore-size distribution.

Some users may initially find per-hole tuning more sophisticated; commissioning support and SOPs mitigate setup complexity.

Well-designed manifolds reduce particulates and pulsation, stabilizing dope rheology at the spinneret entrance. Layered filtration with proper micron ratings for both dope and bore fluid enhances reliability. Combined with degassing and temperature control, this reduces defect rates (e.g., pinholes, fish-eyes) and helps maintain long-run consistency with minimal maintenance interruptions.

Applications and Industry Impact of the FCT 6th Generation Spinneret

The Gen6 spinneret benefits water purification, MBR, hemodialysis-grade hollow fibers, and gas separation by:

• Enabling multi-hole productivity (8/12/16) with per-hole independence to sustain throughput under disturbances;
• Cutting changeover time via FCT cores to support multi-product or spec shifts;
• Supporting cost reduction and quality elevation needed for large-scale, competitive manufacturing.

Adoption considerations include training operators on per-hole diagnostics and documenting best practices for start-up, per-hole isolation, and recovery procedures.

Key Features and Industry Impact of the FCT 6th Generation Spinneret Pack

User Feedback and Case Studies: Real-World Effectiveness

• Significant reductions in line stoppages thanks to per-hole isolation;
• Improved uniformity (OD/ID, wall thickness, flux) and lower scrap during upsets;
• Faster maintenance cycles via FCT cores.

Conclusion

The FCT 6th Generation Spinneret, developed by Trustech for wet-process NIPS hollow fiber spinning, advances Gen5 with per-hole independent control, multi-hole scalability (8/12/16), a pinless high-precision structure, and FCT modular cores. By enabling on/off and regulation of dope and bore fluid per hole, it eliminates whole-line stoppages from single-hole failures, stabilizes quality under material or process fluctuations, and lifts throughput while reducing waste and labor. With optimized flow distribution, advanced filtration/degassing, and sensing-ready design, Gen6 delivers tighter dimensional control, higher consistency, and faster recoveries—supporting cost reduction, efficiency gains, and large-scale manufacturing in China’s membrane industry.