Trustech generally follows a requirement → technical evaluation → solution design → quotation → manufacturing → testing → delivery process. The exact workflow can be adjusted according to the complexity of the project.

• Requirement discussion – Confirm the membrane type, material, target dimensions, production capacity, application, and process requirements.
• Technical evaluation – Assess the appropriate spinning technology, spinneret structure, and equipment configuration.
• Solution & quotation – Define the technical scope, configuration, testing requirements, delivery schedule, and commercial terms.
• Manufacturing – Manufacture the spinneret, spinning machine, or flat-sheet membrane casting system according to the confirmed specifications.
• Testing & acceptance – Equipment can be tested and commissioned at Trustech's facility before shipment, where applicable.
• Delivery & commissioning – Spinnerets are generally straightforward to install, while complete spinning or coating systems can be supported with technical commissioning at the customer's site when required.

Trustech's product portfolio covers hollow fiber spinning machines, TIPS/NIPS systems, flat-sheet membrane casting machines, and hollow fiber spinnerets, allowing customers to work with one technical partner across different stages of membrane production.

Yes. Trustech can support customers from the initial membrane concept toward a manufacturable spinning solution, rather than simply supplying a standard machine or spinneret.

Based on information such as membrane material, inner/outer diameter, wall thickness, pore structure, target performance, production capacity, and intended application, our engineering team can evaluate the relationship between the spinneret design, spinning process, and equipment configuration.

Depending on the membrane system, Trustech can work with technologies including NIPS, TIPS, melt spinning, PTFE spinning, and flat-sheet membrane casting, and provide recommendations on key parameters such as flow-channel design, bore-fluid conditions, temperature control, spinning speed, and equipment configuration.

This approach is particularly useful for new UF/MF membranes, medical membranes, gas-separation membranes, and other specialized membrane projects. With experience from 600+ customers and thousands of projects/batches, Trustech can help identify potential manufacturing risks before customers move from laboratory development to industrial production.

Send us your membrane specifications or preliminary design, and our engineers can assess the appropriate spinning route and equipment configuration.

Yes. Trustech understands that membrane formulations, process parameters, and product designs are often highly confidential and can be critical to your competitive advantage. An NDA can be signed when required before technical discussions or project development.

During cooperation, confidential technical information can be managed through defined project documentation, controlled information sharing, and dedicated project management. Customer projects are handled separately to help prevent unnecessary information crossover.

For projects involving new membrane formulations, spinneret designs, or customized spinning systems, the confidentiality scope and responsibilities of both parties can also be clearly defined in the relevant technical or development agreements.

Our goal is simple: your technology should remain protected throughout the journey from initial technical discussion to equipment delivery and production.

● Zero drift compensation: static empty-scale calibration daily before startup; dynamic calibration every 2 h with a standard weight. Example: for viscous PSf dope, error reduced from ±0.5% to ±0.1%.

● Temperature compensation: mount PT100 on the scale; build a temperature–zero drift model (ΔZ = kΔT) to correct readings in real time.

● Coriolis mass flow meter:

● Zero drift compensation: “air calibration” during downtime with dry air at zero flow to record baseline and auto-correct. Example: for PAN/DMF, flow error reduced from ±0.8% to ±0.2%.

● Temperature compensation: use internal temperature sensing with density–temperature curve ρ = ρ0[1 − α(T − T0)] to correct mass flow.

● High-viscosity specifics:

● Use low-shear Coriolis designs to minimize viscosity effects.

● For ultra-high viscosity (> 1000 cP), consider LIW + time integration as an indirect measurement.

● Online verification: periodically perform volumetric checks with a standard prover to ensure system accuracy within ±0.5%.

● Push: displace dope A under laminar flow (Re < 2000) with high-purity solvent until a clear interface forms to maximize physical displacement.

● Clean (CIP): run preset CIP using the same or compatible solvent for the next dope B for forced circulation flushing.

● Verify: inline sampling with UV spectrophotometer or inline viscometer; when key indices (e.g., absorbance) reach baseline and stabilize, cleaning passes.

● Quantification: optimize CIP time, flowrate, and solvent volume based on verification data to achieve minimal consumption with assured effectiveness.

● Anti-plugging: install low-speed bottom agitators (5–10 rpm) with ultrasonic anti-settling (28 kHz, 100 W) to prevent sedimentation. Add inline filters (50 μm) and schedule regular back-blow cleaning.

● Steady-state control: link a mass flow meter (±0.2%) with a VFD pump for real-time control, keeping flow fluctuation ≤ 1%. Example: in PVDF/DMAc, this cut spinning diameter CV from 8% to 2%.

● Dissolving area: ISO 7; 22°C ± 1°C; RH ≤ 60%; dew point ≤ 15°C. Dehumidifier with ±1°C dew point control to limit solvent-driven humidity increases.
● Feeding room: ISO 6; 20°C ± 0.5°C; RH ≤ 55%; dew point ≤ 12°C. Local laminar flow hoods (0.45 m/s) to keep the feeding process clean.

● Spinning room: ISO 5; 18°C ± 0.3°C; RH ≤ 50%; dew point ≤ 10°C. Dual-stage filtration (pre + HEPA) and constant T&RH AHU to maintain ultra-clean conditions.

● Pulsation damping: install pulsation dampers at pump outlet (N2 charge at ~60% of system pressure) to reduce flow ripple from ±15% to ±2%. For viscous PSf dopes, this markedly stabilizes spinning.
● Resonance isolation: conduct modal analysis to find natural frequencies of pump–piping; shift pump speed away from resonance (e.g., 50 Hz → 35 Hz). Add flexible compensators (length ~5× pipe ID) to attenuate vibration transmission.

● Semi-automatic: time = manual disassembly (T1) + cleaning (T2) + reassembly (T3). Example: PVDF/DMAc to PES/NMP, T1 = 45 min, T2 = 60 min (3× line volume flush), T3 = 30 min; total 135 min.
● Fully automatic: time = automatic flush (T4) + system self-check (T5). Example with integrated CIP/SIP: T4 = 20 min (1.5× volume), T5 = 10 min; total 30 min.

● Solvent consumption:
● Semi-automatic: mass = line volume (V) × flush factor (n) × solvent density (ρ). Example: V = 50 L, n = 3, ρ = 0.95 g/cm³ → 142.5 kg.

● Fully automatic: with optimized segmented/variable-flow flushing, n can drop to 1.2 → 57 kg; ~60% saving.

● Pressure-gradient method: install pressure sensors across the filter to compute ΔP. Warn at 150% of initial ΔP; force shutdown/replacement at 200%. In PVDF hollow fiber production, this yields ~92% accuracy in filter life prediction.
● Particle counting: install a laser particle counter downstream to monitor ≥ 5 μm counts. If counts jump by 50%, initiate backflush; if post-flush counts remain > 100/mL, declare filter failure.
● Maintenance window optimization: model clogging rate with historical data (e.g., ΔP/t = kC, C = contaminant concentration) to adjust cleaning intervals dynamically. For high-solids PAN solutions, this can reduce unplanned downtime by 70%.