TRUSTECH Wins Patent for New Multi-Orifice Braided Tube Reinforced Membranes Hollow Spinneret

China TRUSTECH announced that it has secured a patent for a  "New Multi Orifice Hollow Spinneret for Producing Braided Tube Reinforced Hollow Fiber Membranes, " delivering major gains in output and quality stability for advanced membrane manufacturing. As a China leading membrane spinning machine and hollow fiber membrane spinneret manufacture, TRUSTECH is accelerating the industrialization of high performance hollow fibers used across water treatment, healthcare, and chemical applications.

Background and significance

Hollow fiber membranes are critical to reverse osmosis, microfiltration, nanofiltration, and ultrafiltration. With rapid growth in environmental water treatment, industry requirements for membrane quality and performance continue to rise. The newly patented design addresses legacy limitations of single orifice spinnerets by enabling synchronized multi filament production and tighter quality control.

Key technical highlights

Multi orifice spinneret architecture

The system comprises a braid guide plate, spinneret body, high strength stainless steel needle tube, and spinneret cap fastened by screws for a compact, serviceable structure.

The cap integrates an open cylindrical shell liquid chamber with a side inlet and a circumferential array of forming orifices. Each forming orifice features a coaxial cylindrical buffer groove to equalize shell liquid inflow and improve filament uniformity.

Braid guidance and needle tube synergy

A through channel in the guide plate aligns the braid; the spinneret body includes a needle tube seat. One end of the high strength stainless steel needle tube is fixed in the seat, the other extends into the forming orifice.

A hollow braid channel runs inside the needle tube and maintains a designed gap to the forming orifice, ensuring uniform coating of dope on the braid surface to create an internally reinforced hollow fiber.

Flow stabilizing buffer grooves

Coaxial buffer grooves above each forming orifice improve shell liquid distribution, mitigating thickness non uniformity and enhancing run to run stability.

Durable needle tube construction

High strength stainless steel needle tubes provide robustness and manufacturability for long duration, high pressure operation.

Efficiency through simultaneous extrusion

A circumferential multi orifice layout enables multiple filaments to be spun in parallel, overcoming single orifice throughput limits and meeting large scale production demands.

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 for environmental water purification, medical hemodialysis, gas separation, and more.

The company pioneered FCT spinneret plate technology and advanced from the 5th to the 8th generation with 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 holds 41 independent IP rights and led the  "Hollow Fiber Membrane Spinneret Plate " group standard, closing a long standing standards gap. Its products have shipped in over 3,200 batches to 634 customers across 39 countries, with leading domestic market share. 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 toolkit for capacity estimation, spinneret plate selection in R&D, and process tuning—practical capabilities that help membrane professionals raise efficiency from pilot to plant.

About TRUSTECH

TRUSTECH continues to drive structural and fluid control innovation in spinneret plates, reinforcing its role as a trusted partner to global membrane producers and advancing high efficiency, stable, and scalable hollow fiber manufacturing.

Data source: Industry patent database