Do replacement or worn hollow fiber spinnerets affect membrane quality and batch-to-batch repeatability?

Yes. For customers developing new membrane products or upgrading existing processes, Trustech can participate beyond the role of a conventional equipment supplier and provide joint technical development and scale-up support.

The cooperation can begin with the membrane's target specifications, material system, fiber structure, production capacity, and application requirements. Based on these inputs, Trustech's engineers can work with the customer on:

• Spinneret development – Optimize hole geometry, flow channels, and multi-bore structures according to the target membrane design.
• Process and equipment matching – Evaluate the relationship between the membrane formulation, spinning conditions, spinneret, and production-line configuration.
• Pilot testing and commissioning – Support process trials and equipment adjustment before moving toward larger-scale production.
• Scale-up support – Help translate laboratory or pilot results into a more stable industrial production process.
• Continuous optimization – Use production feedback and test results to identify opportunities for improving stability, efficiency, and membrane consistency.

This collaborative approach is particularly valuable when the customer is working with new membrane materials, specialized hollow fiber structures, medical membranes, gas-separation membranes, or other applications where the process window is relatively narrow.

Rather than asking customers to finalize every technical parameter before purchasing equipment, Trustech can work with them to gradually define the relationship between membrane design → spinneret → spinning process → equipment → production performance.

For customers with long-term R&D plans, this provides a practical path from laboratory concept to pilot validation and eventually industrial-scale production.

Yes. Trustech can provide technical documentation and training materials required for equipment installation, operation, maintenance, and project acceptance, subject to the specific project and documentation requirements.

Depending on the equipment or spinneret supplied, documentation may include:

• Technical specifications and configuration information
• Installation drawings and relevant engineering documents
• Spinneret inspection or dimensional reports
• Equipment operation and maintenance manuals
• Process and commissioning references where applicable
• Inspection and acceptance records
• Technical training for installation, operation, maintenance, and troubleshooting

For equipment projects, Trustech can provide technical guidance during commissioning and help the customer's engineering team understand key operating and maintenance requirements. Training can be conducted remotely or on site depending on project needs.

These documents also provide a useful technical basis for customers conducting internal supplier reviews, equipment acceptance, production qualification, or external certification activities.

Because documentation requirements vary between industries and projects, customers are encouraged to communicate their audit or certification requirements during the quotation stage so that the required documentation can be confirmed in advance.

Trustech provides technical support throughout the operation of its spinnerets and membrane production equipment. When a problem occurs, the first step is to identify the cause rather than simply replace a component.

After receiving customer feedback, Trustech normally provides an initial response within 24 hours. Engineers can review operating conditions, process parameters, equipment status, and relevant photos or videos to conduct remote diagnosis. For more complex issues, on-site technical support can be arranged when necessary.

Troubleshooting generally follows a structured approach:

• Collect information – Review the membrane specification, process parameters, equipment status, operating conditions, and abnormality records.
• Identify the root cause – Determine whether the issue may be related to process conditions, equipment, materials, operation, or other factors.
• Provide corrective measures – Recommend immediate countermeasures to restore stable operation where possible.
• Follow up on the result – Verify whether the recommended adjustment resolves the problem and determine whether further improvement is required.

Trustech also provides technical resources through its online FAQ and video tutorial sections to help customers handle common operating and maintenance questions.

If an issue is ultimately determined to be attributable to Trustech's design or manufacturing responsibility, the corresponding remedial action, such as repair, rework, or replacement, will be handled according to the agreed commercial and technical terms.

The objective is not simply to solve one incident, but to identify its root cause and use the experience to improve future operation and product reliability.

Trustech manages quality through a combination of ISO 9001 quality management, process control, precision inspection, and product traceability.

Quality control begins with incoming materials and continues throughout machining, assembly, inspection, and final delivery. Key manufacturing processes are monitored to ensure that critical dimensions and performance requirements remain within the specified range before products are released.

For spinnerets, particular attention is given to precision parameters such as micro-hole dimensions, concentricity, and eccentricity, supported by dedicated microscopic and image-based inspection methods. Equipment is also inspected and tested according to its configuration and project requirements.

Traceability is an important part of this system. Production and inspection information is recorded throughout the manufacturing process, allowing relevant product or batch information to be reviewed when necessary.

For customers, this means that quality is not based solely on final inspection. It is supported by a controlled manufacturing process that makes potential deviations easier to identify, analyze, and correct.

Different membrane applications place different demands on fiber geometry, flow distribution, material compatibility, process stability, and production efficiency. Trustech therefore does not apply one standard spinneret or spinning configuration to every application.

For water purification and liquid separation, including MF, UF, NF, MBR, and desalination, the focus is generally on stable continuous production, suitable flux, consistent fiber geometry, and scalable output. Trustech provides spinnerets with concentricity of around 0.003 mm for separation-membrane applications, together with NIPS/TIPS spinning solutions for different production requirements.

For hemodialysis and other medical membranes, tighter control of surface quality, dimensional accuracy, eccentricity, and fiber consistency becomes particularly important. Trustech's application portfolio includes dedicated spinnerets for hemodialysis and artificial-kidney membranes, with reported eccentricity reaching approximately 0.003 mm.

For gas separation and artificial-lung applications, spinneret design needs to support precise and consistent formation of specialized hollow fibers. Trustech provides polymer-fiber spinning spinnerets for gas-separation applications, with reported concentricity reaching approximately 0.0003 mm for relevant products.

For RO flat-sheet membrane production, the focus shifts from hollow-fiber geometry to coating and casting consistency. Trustech's flat-sheet systems are designed around continuous casting/coating processes and can integrate systems for heating, mixing, web handling, winding, and process control.

The key advantage is that customers can evaluate the membrane material, structure, process route, production capacity, and equipment configuration together, rather than selecting a spinneret or machine in isolation.

Trustech has developed dedicated micro-deep-hole manufacturing and precision machining capabilities for polymer fiber spinnerets. Its manufacturing processes can achieve step-diameter concentricity of approximately 0.002 mm, with hole concentricity reaching around 0.005 mm under the corresponding process conditions. Automated processing and precision fixtures are also used to maintain consistency between different machining operations.

Inspection is equally important. Trustech combines microscopic and image-based inspection with its Microtech Image Test software to evaluate critical parameters such as micro-hole dimensions, concentricity, and eccentricity.

For customers, the value is not simply achieving high precision on one prototype. The combination of precision machining + dedicated inspection + process control helps establish a repeatable manufacturing process for subsequent batches.

This is particularly important for applications such as hemodialysis, gas separation, and high-performance water-treatment membranes, where consistency between holes and between production batches can directly affect membrane performance.

If you have a required hole diameter, concentricity, or multi-bore structure, send us your specifications and we can evaluate the appropriate manufacturing approach.