Product details of the wet spinneret
Quick Overview
wet spinneret is excellent in outlook as you can see by pictures. The product is highly praised by experts regarding performance evaluation. Quality is what Shanghai Trustech Technology Development Co., Ltd. pays the most importance to.
Product Information
Trustech's technical level is higher than its peers. Compared with peer products, the wet spinneret produced by us has the following highlights.
Main structure and mechanism
symmetric layout and optimized thermal paths reduce the impact of thermal
drift and assembly stress on uniformity.
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 Dual Layer 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.
No positioning pins needed, making assembly and disassembly as simple as using a screw.
Longer operational lifespan.
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 | 65℃ |
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 |
Suitable Materials
PVDF (Polyvinylidene Fluoride), CA (cellulose acetate), PVC (Polyvinyl chloride), PES (Polyethersulfone), PSF/PSU (Polysulfone), PA (Nylon, Polyamide), PAN (polyacrylonitrile)
FCT Design FCT
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.
Customer Membrane Examples
FAQ
Company Introduction
Trustech specializes in wet spinneret with high quality and professional service. Our company has a highly vigilant Quality Assurance team. They ensure that our products are safe and efficacious, from raw material to the finished products. We always conduct our business complying with the highest ethical and operational standards. We have set a goal - to treat our customers and suppliers with fairness, honesty, and respect.
If you need to buy our products, welcome to contact us!
About Trustech