Core sections of flat sheet membrane casting machine
Dope preparation and delivery system:
The core units are the mixing tank and precision delivery pump. Strictly control polymer concentration, additives, temperature, and viscosity of the casting dope to ensure stable rheology.
Doctor-blade/casting system:This is the core film-forming section. Key equipment includes the doctor blade or extrusion die. Precisely control blade gap height, blade-to-substrate angle, and the tension of the nonwoven substrate.
Phase inversion and solidification system:Depending on the process, this is either a coagulation bath for NIPS or a cooling zone for TIPS. Strictly control coagulation bath temperature and chemical composition (for NIPS), or the cooling zone temperature gradient and air velocity (for TIPS). These parameters govern phase-separation kinetics and directly determine the membrane’s micro-pore structure, surface pore size, and porosity.
Post-treatment and winding system:
Mainly includes washing tanks and a winder. Control wash-water purity, temperature, and number of stages to thoroughly remove solvent, and precisely control winding tension and speed to prevent wrinkling or stretching, ensuring flatness and mechanical integrity of the final product.
Key control parameters
|
Core Sections |
Parameters |
|
Dope preparation and delivery system |
|
|
Polymer Concentration |
16.70 wt% (PVDF/PES in DMAC) |
|
Solvent Purity |
≥ 99% |
|
Coating Thickness |
50 μm |
|
Blade Gap Accuracy |
± 10 μm |
|
Doctor-blade/casting system |
|
|
Effective Coating Length |
800 mm |
|
Coating Thickness |
50 μm |
|
Phase inversion and solidification system |
|
|
Coagulation Bath Temperature |
27 °C |
|
Bath Length |
3 m |
|
Conveyor Speed |
5 m/min |
|
Rinse Flow (Pure Water) |
5 L/min |
|
Drying Temperature |
80 °C |
|
Humidity |
≤ 30% RH |
|
Post-treatment and winding system |
|
|
Hot-Press Temperature |
70 °C |
|
Pressure |
0.3 MPa |
|
Winding Tension |
0.5 N |
Suitable Materials
PVDF (Polyvinylidene Fluoride)
CA (cellulose acetate)
PVC (Polyvinyl chloride)
PES (Polyethersulfone)
PSF/PSU (Polysulfone)
PA (Nylon, Polyamide)
PAN (polyacrylonitrile)
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.
FAQ
Company Advantages
· Trustech flat sheet membrane casting machine is manufactured under modern management system.
· All of our flat sheet membrane casting machine can be designed and customized, including pattern, logo and so on.
· Shanghai Trustech Technology Development Co., Ltd. provides professional sales support for local partners and key accounts.
Company Features
· Shanghai Trustech Technology Development Co., Ltd. is a key flat sheet membrane casting machine supplier and important strategic partner of many well-known groups at home and abroad.
· We are supported by an executive team. They can ensure that our staff has sufficient competent resources and information for the implementation and delivery of the business plan.
· Shanghai Trustech Technology Development Co., Ltd. has always upheld 'Good Faith as Principle'. Get quote!
Application of the Product
Trustech's flat sheet membrane casting machine can meet the different needs of customers.
We are committed to meeting the need of our customers. We will go deeper into their situation and provide them with most suitable solutions.
About Trustech