Trustech Secures Two Patents for Multi Orifice Hollow Fiber Membrane Spinning Devices

In the field of hollow fiber membrane equipment manufacturing, technological innovation is the core of a company's market standing. Trustech, with its "Multi Orifice Hollow Fiber Membrane Spinning Device" (Authorization Announcement No.: CN106435788B) and "Insert Tube Type Multi Orifice Spinneret Head" (Authorization Announcement No.: CN116356437B), continues to lead the industry's technological frontier.

Patented Technologies: Structural Innovations Solve Industry Pain Points

The "Multi Orifice Hollow Fiber Membrane Spinning Device" patent centers on a "multi orifice modular" structure composed of a feed plate, a dope (core liquid) flow guiding plate, a spinneret plate, and independent spinneret heads. The feed plate and the core liquid flow guiding plate are connected vertically; the spinneret plate is fixed to the lower end of the flow guiding plate; and multiple independent spinneret heads are embedded into assembly apertures in the spinneret plate by means of a detachable design. This not only breaks through the inefficiency bottleneck of traditional single orifice spinneret heads—"one pass, one filament"—but also addresses the early multi orifice equipment issues of uneven distribution of feed liquid and core liquid.

The device's "uniformity design" is the key breakthrough. The feed liquid chamber within the spinneret plate and the core liquid chamber within the flow guiding plate are connected through a flow equalizing ring structure, ensuring that the feed liquid and core liquid simultaneously enter each independent spinneret head at the same pressure. The feed liquid must first fill the feed liquid chamber and only flows into the spinneret heads after the liquid level exceeds the flow equalizing ring height; the core liquid is uniformly distributed via symmetrically arranged diversion holes. This controls membrane filament thickness deviation within 0.003 mm, improving consistency by more than 80% compared with traditional equipment.

The detachable design of the independent spinneret heads is even more innovative. Each spinneret head is threaded to the spinneret plate; in the event of clogging or damage, there is no need to disassemble the entire setup—individual replacement takes only 10 minutes, reducing maintenance time by 96% and costs by 70%. Meanwhile, the multi orifice modular structure supports expansion of the number of spinneret orifices; synchronized production with 1,536 orifices has already been achieved, making efficiency nearly 50 times higher than that of conventional 32 orifice equipment.

Technology Continuity: Insert Tube Patent Extends Application Boundaries

As a technological extension, the "Insert Tube Type Multi Orifice Spinneret Head" patent integrates a first liquid guiding chamber and a cooling liquid chamber within the spinneret head frame, which are connected via liquid guiding tubes to the spinneret nozzles and a second liquid guiding chamber, respectively. During operation, the spinning dope is delivered to the spinneret nozzles through the first liquid guiding chamber, while cooling liquid is simultaneously jetted from the outlet holes of the second liquid guiding chamber onto the surface of the spinning dope. This enables rapid cooling and avoids contamination from airborne dust, further improving product purity.

The patent's adjustment assembly is likewise practical: by rotating the fixing bolts, the spacing of the mounting frames can be adjusted to prevent filament entanglement. The spinneret nozzles adopt a threaded connection and are paired with anti wear wheels and anti slip groove designs, facilitating disassembly and maintenance while reducing frictional damage to the filaments and further improving production stability.

Technological Iteration: Building a Comprehensive Technical Solutions Provider

These two patents are important outcomes of Trustech's technological iteration. Among them, the "Multi Orifice Hollow Fiber Membrane Spinning Device" underpinned the company's fifth generation spinneret head technology to achieve the "independent spinner core, pinless" breakthrough, reaching 0.002 mm precision and making the company the first in China to realize mass production of spinneret heads for medical hemodialysis membranes—breaking foreign monopolies. Building on this, the company has continued to release sixth  through ninth generation technologies, achieving upgrades such as independent control of feed liquid and online spinner core replacement without shutdown. Its products currently hold a market share of over 90% in China's high end market.

As the lead drafting organization of the group standard "Hollow Fiber Membrane Spinneret Plate" (T/SHDSGY058-2022), Trustech has incorporated patented technical indicators into industry standards, promoting the sector's shift from "experience based production" to "precision manufacturing." Its products have been exported to 39 countries and regions, serving 634 customers and providing critical equipment support for fields such as environmental water purification and medical hemodialysis.

With continuous patent innovation, Trustech—one of the world's leading manufacturers of hollow fiber membrane spinning equipment and hollow fiber membrane spinneret plates—not only consolidates its industry position, but also propels the hollow fiber membrane field toward higher efficiency, greater stability, and lower cost, injecting lasting momentum into industrial upgrading.