Product details of the hollow fiber membrane spinneret
Product Description
Appreciated by most customers, Trustech have been deeply realized the importance of hollow fiber membrane spinneret to users. The product is extensively known for high quality and reliability. Shanghai Trustech Technology Development Co., Ltd. has great industrial chain competitiveness and brand influence.
Main structure and mechanism
Trustech Spinneret Key Design Elements Trustech
These parameters are fundamental to spinneret design and directly determine the membrane's final performance:
|
Parameter |
Description |
Influence on membrane performance |
| Flow channel (R) | The runner for transporting, buffering, and distributing the dope and bore fluids. | Different structures should be optimized according to material properties, viscosity, spinneret orifice size, and hole quantities to achieve optimal spinning performance. |
| Annular gap width (d) | The gap (thickness) of the dope flow channel. | It primarily determines the hollow fiber wall thickness. Narrower gaps yield thinner walls and lower mass-transfer resistance, but may reduce mechanical strength. |
| Bore tube outer diameter (d₁) | The outer diameter of the central tube forming the inner wall of the annular gap. | Together with the outer sleeve inner diameter, it defines the annular gap width. |
| Outer sleeve inner diameter (d₂) | The inner diameter of the spinneret outer sleeve forming the outer wall of the annular gap. | Together with the bore tube outer diameter, it defines the annular gap width and the fiber outer diameter. |
| Central tube inner diameter (d₃) | The diameter of the bore fluid channel. | It primarily determines the fiber inner diameter. The inner diameter affects membrane module packing density and the pressure drop of fluid inside the fiber. |
| Length-to-gap ratio (L/d) | The ratio of the flow channel length (L) to the annular gap width (d). | It affects spinning stability. Designing an appropriate L/d according to material properties and process conditions helps stabilize flow and eliminate entry effects, resulting in more uniform extruded fibers membrane. |
| Concentricity | The coaxial alignment among the dope layer inner diameter at the spinneret outlet and the bore tube inner and outer diameters. | It affects wall-thickness uniformity and bubble point pressure. |
| Extrusion face geometry | The foremost geometry of the spinneret, such as flat or micro-tapered. | It influences draw-down and deformation after extrusion, especially important for the air-gap segment in dry-wet spinning. |
The Advantages of Trustech FCT Spinneret Trustech
The spinneret design covers a wide dope viscosity range, offers strong versatility, high spinning stability, and effectively reduces issues such as filament breaks.
Product Parameters
|
Brand |
Trustech |
Application |
NIPS |
| Material | SUS304, SUS630, SUS316L | Holes/Pack | 1-32 |
| Dope inlet Thread | G1/8, BSP1/8, NPT1/8 | Minimum membrane OD | 0.20mm |
| Bore liquid inlet thread | G1/8, BSP1/8, NPT1/8 | Customize thread | Yes |
| Precision | ±0.002mm | Concentricity | 0.003mm |
| Design | FCT design | Connections | Standard |
| Viscosity application | 1000-300000cp | Roughness | Ra0.2-0.8 |
| Solvent | DMAC, DMF, NMP | Temperature | 150℃ |
Suitable Materials
PVDF (Polyvinylidene Fluoride), CA (cellulose acetate), PVC (Polyvinyl chloride), PES (Polyethersulfone), PSF/PSU (Polysulfone), PA (Nylon, Polyamide), PAN (polyacrylonitrile)
FCT Design
We can offer FCT designs that allow the spinneret core to be removed, replacing conventional designs where each spinneret hole cannot be independently replaced or disassembled. If one hole has a quality issue, the entire spinneret traditionally needs repair or scrapping. Our FCT spinnerets are independently designed so each hole can be individually replaced if needed. The FCT 6th-generation spinneret enables independent on/off control of the dope feed for each spinneret core, and the 8th-generation FCT spinneret cores can be changed online within a few minute down to 50 seconds when problems occur,to ensure continuous production without downtime.
Common Specifications
| No. | General Specification | Application | Design Type | Type |
| 1 | 0.35/0.19/0.13 | NIPS | FCT design | Single-aperture/ Multi-aperture |
| 2 | 0.40/0.19/0.13 | NIPS | FCT design | Single-aperture/ Multi-aperture |
| 3 | 0.5/0.28/0.15 | NIPS | FCT design | Single-aperture/ Multi-aperture |
| 4 | 0.6/0.4/0.2 | NIPS | FCT design | Single-aperture/ Multi-aperture |
| 5 | 0.8/0.4/0.2 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 6 | 1.3/0.7/0.4 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 7 | 1.4/0.8/0.6 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 8 | 1.5/0.9/0.6 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 9 | 1.6/1.0/0.6 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 10 | 1.8/1.1/0.5 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 11 | 1.9/1.2/0.6 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 12 | 2.0/1.0/0.7 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 13 | 3.1/1.8/1.5 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 14 | 3.1/1.8/1.5 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 15 | 3.2/2.2/1.8 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 16 | 3.3/1.1/0.9 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
| 17 | 3.4/2.4/2.0 | NIPS | Conventional design/ FCT design | Single-aperture/ Multi-aperture |
Customer Membrane Examples
FAQ
Company Feature
• Trustech has an efficient and practical team. With the pursuit of excellence, our team members carry out strict control over every aspect, from production to sales and transportation.
• Our company is located in a beautiful place with outstanding people. And, there is a well-developed transportation network. It is conducive to the purchase and shipment of goods.
• Trustech's sales network covers major provinces, cities and autonomous regions in the country. In addition, Spinning Machine,Hollow Fiber Spinneret,Gear Metering Pump are favored by overseas customers and are sold to Southeast Asia, Africa, Australia, and other countries and regions.
• Since the establishment in our company has accumulated rich production experience and successfully cooperated with many large domestic enterprises.
If you want to know more details of our products, please contact us. We are looking forward to cooperating with you!
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