Leading Hollow Fiber Membrane Spinning Machine and Spinneret Manufacturer - Trustech

Trustech NIPS Hollow Fiber Spinneret 16 Holes

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4

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Product details of the hollow fiber membrane spinneret

Product Introduction

The whole production of Trustech hollow fiber membrane spinneret has been greatly optimized to meet different needs. In its production, we place the highest value on reliability and quality. Customized service can be provided for our hollow fiber membrane spinneret.

Typical architecture and flow paths

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 3 Coaxial or multi-coaxial structure: spinning spinneret annulus for the sol/slurry, center for the bore fluid; optional additional coaxial ring for external coagulant or a sheath flow.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 4 High solids/thixotropic feed compatibility: spinneret enlarged, rigid, and wear resistant annulus and orifice; wear-resistant liners (zirconia/tungsten carbide/sapphire); polished wetted surfaces plus anti-wear coatings to mitigate particle abrasion and clogging.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 5 low shear, low holdup design: Trustech spinneret gently curved distribution channels and a diffusion/ flow straightening chamber to reduce shear induced gelation, flocculation, or bridging.

主图 (3)

Trustech hollow fiber Membrane spinneret FCT 5th G (2)

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 8 Gelation trigger interface: a coaxial sleeve flow of external coagulant near the orifice or a short free gap to coagulation bath to achieve rapid gelation and shape fixing; optional outer shielding liquid to stabilize the free surface of Trstech spinning spinneret.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 9 Thermal management and degassing: spinneret need upstream temperature control jacket and vacuum degassing port to suppress bubbles and thermally induced viscosity jumps.

Structural Features Structural features and process essentials

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 10

Multilayer co-extrusion

Enable coaxial composites with a dense skin and porous support to co-form the selective layer and support in one pass.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 11

Compatible with diverse bore fluids

Inner phase can be inert oil, water, or solutions with crosslinkers/ salts to control lumen roundness and gelation rate.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 12

Wear resistance and anti-clogging

For particulate/high solids sols, use ultra-hard materials at the orifice and capillary; smooth channel corners to reduce particle holdup and gel-skin blockage.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 13

Stable gel front

Via coaxial external coagulant or a short air-gap-to-bath configuration, rapidly form a self-supporting "green" wall to prevent collapse and ovalization.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 14

Shrinkage and sintering compensation

Spinneret dimensions and wall-thickness targets must account for drying/sintering shrinkage typically 10-40%; channel design and take up strategy should match shrinkage anisotropy.

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.
Central tube inner diameter (d₃)	The diameter of the bore fluid channel.
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.
Concentricity
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 Generation 5th Spinneret Trustech

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 16 Wear resistant and anti-clogging, compatible with high solids slurries: Nozzles and liners made from ultra-hard materials (zirconia, tungsten carbide, sapphire), with polished surfaces and anti-wear coatings, resist particle abrasion and clogging, ensuring stable delivery of high solids, viscous sols/slurries.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 17 Low shear and rapid gel-forming: Gently curved distribution channels and a coaxial external gelling agent flow or short air-gap design significantly reduce shear stress to prevent premature gel aggregation; rapid gelation at the nozzle exit forms a robust green fiber wall, avoiding collapse and ovalization.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 18 Multilayer co-extrusion with controlled shrinkage compensation: Supports multilayer co-extrusion (dense skin + porous support), producing composite ceramic/metal/glass hollow fibers in a single pass; spinneret dimensions and wall-thickness are pre-compensated for 10–40% drying/sintering shrinkage, maintaining dimensional accuracy and structural integrity after high-temperature sintering (400–1200°C).

Product Parameters

Brand	Trustech	Application	Sol-Gel Sintering
Material	SUS304, SUS630, SUS316L	Holes/Pack	Single
Dope inlet Thread	G1/8, BSP1/8, NPT1/8	Minimum membrane OD	1.0mm
Bore liquid inlet thread	G1/8, BSP1/8, NPT1/8	Customize thread	Yes
Precision	±0.002mm	Concentricity	0.003mm
Design	Conventional 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)

Key design parameter references (one of customer process as example)

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 19 Annular gap height: typically 150–300 μm for polymer systems; for sol–gel, relax to about 200–800 μm to resist clogging and maintain flow.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 20 Coaxiality: ≤5-10μm ,the smaller, the better; for multi-hole arrays, inter hole flow variation ≤±3%.

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 21 Material selection: 316L/17-4PH stainless steel body;

Hollow Fiber Membrane Spinneret Products Wholesale - Trustech-4 22 Cleaning and maintenance: solvent flushing and ultrasonics for polymer systems; for sol–gel, solvent/dispersant recirculation plus mechanical passage clearing.

Conventional design

FCT design

Common Specifications

No.	General Specification	Application	Design Type	Type
1	1.3/0.7/0.4	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
2	1.3/0.8/0.5	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
3	1.3/1.0/0.7	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
4	1.4/0.7/0.4	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
5	1.4/0.9/0.6	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
6	1.4/1.0/0.8	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
7	1.6/0.8/0.5	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
8	1.6/0.9/0.6	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
9	1.8/0.9/0.5	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
10	1.8/1.2/0.6	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
11	1.8/1.2/0.8	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
12	2.3/1.5/1.0	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
13	2.3/1.5/1.2	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
14	2.7/1.5/1.2	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
15	2.2/1.7/1.4	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
16	2.7/2.2/1.9	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
17	2.8/2.0/1.5	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
18	2.8/2.2/1.9	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
19	2.8/2.3/2.0	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
20	2.9/1.4/1.1	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
21	2.9/1.8/1.5	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
22	2.9/1.9/1.6	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
23	3.0/2.3/1.9	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
24	3.0/2.3/2.0	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
25	3.1/2.8/2.5	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
26	3.2/2.2/1.8	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
27	3.4/1.7/1.4	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
28	3.4/2.2/1.8	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
29	3.7/1.9/1.6	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
30	3.8/2.2/1.9	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture
31	3.8/2.3/2.0	Sol-Gel Sintering	Conventional design	Single-aperture/ Multi-aperture

Customer Membrane Examples