TRUSTECH Secures Patent for Modular Hollow Fiber Membrane Spinning Device

China TRUSTECH announced that it has been granted a patent for a modular multi orifice hollow fiber membrane spinning device that overcomes long standing challenges of uneven core/shell distribution and difficult maintenance in legacy systems. By combining detachable, independent spinneret heads with mathematically optimized equalization structures, the invention enables high efficiency, uniform fiber formation and sharply improves serviceability. As a China leading membrane spinning machine and hollow fiber membrane spinneret manufacture, TRUSTECH is strengthening the industrial backbone for advanced water treatment, medical, and chemical applications.

Background

Traditional hollow fiber production often suffers from non uniform dope distribution and complex maintenance, constraining quality and throughput. The new modular device from TRUSTECH introduces a split architecture and tuned fluid dynamics to stabilize co flow at scale, improving consistency while cutting downtime.

Key technical highlights

Modular independent spinneret head design

The device integrates a feed plate, core liquid guide plate, spinneret plate, and multiple detachable independent spinneret heads.

Each head comprises a core liquid guide tube, spinneret body, and an auxiliary functional ring. Heads mount in the spinneret plate via threads or bayonet locks and support single point replacement without disassembling the frame, boosting maintenance efficiency by 80%+.

Dual equalization systems for uniform distribution

Core liquid equalizing ring: A stepped chamber within the guide plate uses mathematically modeled cross section optimization (Wa:Ha = n:(n−2K)) to equalize pressure and deliver consistent core flow to every head.

Shell liquid equalizing ring: A co axial ring in the spinneret plate chamber forces the shell liquid to level to a set height before entering each forming orifice, eliminating inter orifice flow deviation.

Precision fluid channels in each head

The core liquid tube is strictly co axial with the forming orifice; its bore (0.1–0.5 mm) is smaller than the orifice ID to create a stable annular shell liquid encapsulation.

Radially arranged shell injection ports feed the central forming orifice and prevent dead zones, supporting laminar convergence at the tip.

Scalability and functional upgrades

By increasing the number of assembly bores, the system scales to hundred orifice modules, lifting per pass output by orders of magnitude.

The auxiliary ring can integrate temperature sensing or adjustment features for real time process monitoring and control.

Measured benefits

Mathematically optimized equalization reduces wall thickness variation; inter orifice thickness consistency error can be held below 3%.

Detachable heads minimize material loss and downtime, while modular expansion supports rapid capacity scaling.

Company technology leadership

TRUSTECH is a high-tech enterprise focused on the R&D, manufacturing, and sales of hollow fiber membrane spinneret heads and spinneret plates. The company's solutions serve environmental water purification, medical hemodialysis membranes, gas separation membranes, and broader water, healthcare, and chemical industries. TRUSTECH 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. The firm holds 41 independent IP rights and led drafting of the "Hollow Fiber Membrane Spinneret Plate " group standard, 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 has been 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. "

Digital enablement

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

About the company

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

Data source: Industry patent database