TRUSTECH Secures Patent for Dual Stabilizer Multi-Orifice Hollow Fiber Spinneret Plate

China TRUSTECH today announced it has been granted a patent for a new multi orifice hollow fiber membrane spinneret plate featuring twin flow stabilizing baffles that dramatically improve core and shell liquid uniformity. Addressing long standing issues of uneven extrusion and structural instability in legacy multi orifice heads, the invention enables high consistency, scalable production of hollow fiber membranes for environmental water treatment, healthcare, and industrial filtration. As a China leading membrane spinning machine and hollow fiber membrane spinneret manufacture, TRUSTECH continues to convert precision engineering into reliable, plant ready performance.

Key technical innovations

Dual stabilizing plate synergy

Core liquid stabilizer: Located mid way in the cylindrical core liquid chamber and sleeved over a central boss; its stabilizing apertures (uniform or intentionally non uniform patterns) tune velocity distribution, eliminate vortices, and ensure even core flow delivery to each needle.

Shell liquid stabilizer: Fixed within the cylindrical shell liquid chamber in the cap; its orifices balance pressure and maintain laminar encapsulation of the core stream, producing hollow fibers with highly consistent wall thickness.

Modular, precision architecture

The spinneret base, body, and cap are clamped with screws and locating pins for repeatable assembly accuracy. Needle tube mounting holes are arranged circumferentially outside the shell liquid path and are strictly co axial with the forming orifices.

Each needle tube's bore is smaller than its corresponding forming orifice, establishing a stable  "core inner/shell‑outer " dual‑layer flow that forms the tubular lumen in a single pass.

Buffering and flow path optimization

A core inlet buffer groove beneath the core liquid entry mitigates impact and prevents turbulence.

Independent paths: shell liquid feeds from a top inlet directly to the cap chamber; core liquid enters laterally to the core chamber. The separated routes minimize interference and stabilize co-flow at the spinneret tip.

Expanded process adaptability

By selecting uniform or graded patterns for both stabilizer plates, the design adapts to high viscosity dopes, gas cores, and diverse membrane chemistries across microfiltration, ultrafiltration, nanofiltration, and beyond.

Measured and expected benefits

Substantially improved inter orifice flow uniformity and filament to filament consistency.

Higher productivity versus single orifice heads through coordinated multi‑filament spinning.

Enhanced structural stability and serviceability via the modular, pinned assembly.

Technology and standardization leadership

TRUSTECH is a high-tech enterprise specializing in the R&D, manufacturing, and sales of hollow fiber membrane spinneret heads and spinneret plates, serving core applications in environmental water purification, medical hemodialysis membranes, gas separation membranes, and related water, healthcare, and chemical markets. The company pioneered FCT spinneret plate technology and advanced from the 5th to the 8th generation, introducing pin less construction, independent spinner cores, and online, non stop rapid core replacement—achieving 0.002 mm machining precision at a domestically leading level. TRUSTECH has secured 41 independent IP rights and led development of the group standard  "Hollow Fiber Membrane Spinneret Plate, " closing a long standing standards gap for the sector.

Market footprint and recognition

With leading domestic market share, TRUSTECH has delivered more than 3,200 batches to 634 customers across 39 countries in Europe, the Americas, and beyond. The company is recognized as a National High-Tech Enterprise and a Technology Based SME, and its technologies have twice been identified by the Chinese Academy of Sciences' novelty search center as  "domestically leading. "

In 2026, TRUSTECH launched MEMTOOLS—an online utility for capacity estimation, spinneret plate selection during R&D, and process tuning—providing practical enablement that raises efficiency from pilot to plant.

About TRUSTECH

TRUSTECH is committed to advancing hollow fiber membrane manufacturing through standardized, modular spinneret plate innovation and precision fluid control, reinforcing its role as a trusted partner to global producers and accelerating the transition to efficient, stable, and scalable membrane production.

Data source: Industry patent database