TRUSTECH Secures Invention Patent for Modular Spinneret Plate

China TRUSTECH has been granted an invention patent for a "Modular Multi Orifice Hollow Fiber Membrane Spinneret Head, " marking a new milestone in scalable, serviceable, and specification compatible spinneret architecture for hollow fiber membrane production. As a China leading membrane spinning machine and hollow fiber membrane spinneret manufacture, TRUSTECH is advancing the industry with modular engineering that enables linear orifice expansion, separated maintenance, and cross spec compatibility—all without replacing the entire spinneret assembly.

Breakthrough: Split Module Architecture for Expandability and Serviceability

The patented design separates the spinneret into two primary building blocks:

Flow Guiding Module: A three layer stack—spinneret flow guiding base, core liquid (dope) guide plate, and shell liquid guide plate—clamped by screws to form independent channels for core and shell liquids.

Spinneret Modules: Each module integrates a feed plate and a hollow fiber spinneret plate, assembled via locating pins and fastening screws. Multiple spinneret modules couple to the flow guiding module's bosses through threaded interfaces, enabling linear expansion from 16 to 1,024 orifices without changing the overall spinneret head.

This modular approach allows any single spinneret module to be removed, cleaned, or replaced independently, dramatically simplifying upkeep while preserving line availability.

Dual Channel Precision Control for Stable Laminar Co Flow

Core liquid enters through the flow guiding base's core liquid inlet, fills symmetric receiving cavities, and is split via first and second core liquid guide holes into each spinneret module's core flow passage before injection through the needle tube into the forming orifice.

Shell liquid enters via a dedicated inlet, passes through shell liquid guide holes to the feed plate inlets, and forms an annular encapsulating flow inside a conical shell liquid chamber.

A co axial arrangement of needle tube and forming orifice maintains laminar, concentric layers of core and shell liquids, avoiding eccentricity defects associated with adhesive bonded legacy structures.

Maintenance and Compatibility Optimized

A combined cleaning port plus O ring seal enables online flushing of clogged needle tubes.

Pull slots allow rapid extraction of locating pins; single module swap time is reduced to about 5 minutes.

A universal interface on the flow guiding module accepts spinneret modules of differing orifice sizes, so one spinneret head can run microfiltration and ultrafiltration grades in the same frame—no upstream feed system changes required.

Verified Process Performance

Laboratory validation demonstrates that at 0.3 MPa:

Inter orifice flow variation is <3%.

Hollow fiber inner/outer diameter tolerances are held within ±0.02 mm.

Modular assembly raises orifice cleaning efficiency by 70% and cuts maintenance downtime by 80%.

Company Technology Leadership and Standardization

TRUSTECH is a high-tech enterprise specializing in the R&D, manufacturing, and sales of hollow fiber membrane spinneret heads and spinneret plates. Its solutions are widely used in water treatment, healthcare (hemodialysis membranes), gas separation, and chemical industries. The company pioneered FCT spinneret plate technology and drove iterative upgrades 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 and recognized domestic leadership. To date, TRUSTECH has secured 41 independent IP rights and led the drafting of the group standard  "Hollow Fiber Membrane Spinneret Plate, " closing a long standing standards gap for the sector.

Market Footprint and Digital Enablement

With leading domestic market share, products from TRUSTECH have been delivered in 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. " In 2026, TRUSTECH launched MEMTOOLS, an online toolkit for capacity estimation, spinneret plate selection in R&D, and process tuning—practical enablement that helps membrane professionals improve efficiency from lab to plant.

Data source: Industry patent database