TIPS Hollow Fiber Membrane Spinning Machine-1
TIPS (thermally induced phase separation) hollow fiber membrane spinning is a technique for producing microporous membranes via temperature change. The core principle is to dissolve a polymer at high temperature in a high boiling, low volatility solvent to form a homogeneous solution, then extrude it through a spinneret. During cooling after extrusion, the system undergoes liquid–liquid or solid–liquid phase separation, ultimately solidifying to form a polymer rich phase and a solvent rich phase. Subsequent extraction removes the solvent; the space previously occupied by the solvent rich phase becomes the membrane’s microporous structure.
A TIPS hollow fiber membrane spinning equipment mainly consists of four core sections: melt extrusion system, phase separation and cooling system, extraction and drying system, and winding and post treatment system. The hollow fiber membrane spinning system performance and stability determine the quality and properties of the hollow fiber membrane. Leveraging 11 years of experience and R&D, Trustech has upgraded the SteadyiCore Ultra 2.0 Heating System, TitanMix Pro 4.0 Mixing System, SmartCoil Elite 3.0 Automatic Winding, and StoutDrive 2.0 motor drive setup. These Trustech technologies precisely control temperature and heat transfer uniformity, automate take up to save labor, thereby enhancing hollow fiber membrane spinning machine stability and reliability, reducing setup time and production downtime, and increasing overall spinning efficiency by 7.4% compared with pre-upgrade levels.
Core sections of a TIPS production line TIPS
Control parameters: temperature, pressure, screw speed. Extrusion temperature must be precisely controlled to maintain a homogeneous solution and avoid thermal degradation due to local overheating; pressure must be stable to ensure flowability;
Control parameters: cooling rate, cooling medium temperature. The cooling rate directly influences pore morphology and should be controlled via air cooling or a liquid coagulation bath;
Control parameters: type of extractant, extraction time, drying temperature. The extractant should be low-toxicity and environmentally friendly; extraction time must be sufficient to remove residual diluent; drying temperature should be moderate to avoid fiber deformation or pore collapse.
Control parameters: winding tension, cutting length, packaging method. Winding tension should be uniform to prevent fiber stretching or breakage.
Key control parameters
|
Core Sections |
Parameters |
|
Melt extrusion system |
|
|
Materials |
PVDF + DOP |
|
Process |
Melt Mixing (Twin-screw extruder) |
|
Temperature |
180 °C |
|
Stirring Speed |
160 rpm |
|
Mixing Time |
50 min |
|
Solids Content |
24 wt% |
|
Phase separation and cooling system |
|
|
Metering Pump Accuracy |
±0.5% |
|
Bore Fluid (N₂) Flow Rate |
0.26 L/min |
|
Spinneret Orifice Diameter |
2.6 / 1.2 mm |
|
Spinneret Temperature |
182°C |
|
Spinning Speed |
15 m/min |
|
Air Gap Length |
10 cm |
|
Extraction and drying system |
|
|
Coagulation Medium |
Water/ethanol mixture |
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Coagulation Bath Temperature |
40°C |
|
Cooling Rate |
40°C/min |
|
Target Porosity |
40–70% |
|
Winding and post-treatment system |
|
|
Residual Diluent Target |
<0.1% |
|
Drying Temperature |
60°C |
|
Drying Time |
2 h |
|
Draw Ratio |
3.7× |
Suitable Materials
Customer Membrane Examples
Brief Introduction
Trustech is a leading company that specializes in the research, development, and manufacturing of hollow fiber membrane spinning machines and spinning spinnerets. These spinning machines and spinning spinnerets have extensive applications across various industries including water purification, gas separation, hemodialysis, ECMO (Extracorporeal Membrane Oxygenation), food and beverage processing, biotechnology, and chemical engineering, among others.
Trustech is not only at the forefront of hollow fiber membrane spinnerets which develop FCT 5th － 8th generation technology, but also leading hollow fiber membrane spinning machine and flat sheet membrane casting system. Backed by outstanding R&D and quality, Trustech holds China’s high-end market, upgraded spinning systems to enhance precision and stability, and engineered key subsystems including the SteadyiCore Ultra 2.0 Heating system,TitanMix Pro 4.0 Mixing system, PrimeGlider Pro 3.0 Automatic pay-off, SmartCoil Elite 3.0 Automatic winding and StoutDrive 2.0 motor drive setup. These advances of spinning machine and spinneret improved spinning system stability, reduced commissioning and production downtime, and increased overall spinning efficiency by 11.4% compared with before the improvements.
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