Leading Hollow Fiber Membrane Spinning Machine and Spinneret Manufacturer - Trustech

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 1

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 2

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning

Trustech FCT 5th Generation Homogeneous Membrane Spinneret is the core forming equipment developed on the Fast Change Technology (FCT) . Featuring a"split spin core + flow channel plate" architecture and a high precision monolithic core,Trustech spinning spinneret is specifically designed for producing homogeneous polymer membranes such as gas separation membranes, pervaporation membranes, and high precision filtration membranes which exhibit uniform structure without a pronounced pore gradient.

Building on the FCT series' core strengths of"high precision and easy maintenance," spinneret structure and features are specially optimized to meet the stringent requirements of homogeneous membranes for feed uniformity, structural stability, and performance consistency. It is a key enabler for the large scale, high quality production of homogeneous membranes, achieving high homogeneity across holes and batches. Its central objective in multi-hole parallel production is to stabilize outer diameter, wall thickness, and pore structure, reduce dispersion, and significantly shorten setup and maintenance time, thereby boosting OEE and throughput.

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Main structure and mechanism

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 3 Split design: decouples the spin core from the flow channel plate; no locating pins; quick removal and installation like screwing in a bolt.

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 4 Monolithic high precision spin core: one-pass machining of critical geometries of spinneret; machining accuracy up to 0.002 mm and concentricity of 0.003 mm; bore needle resists runout and is less prone to damage.

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 5 Iso-pressure distribution and flow straightening: multi-stage damping chambers with equal resistance distribution reduce pulsation and inter hole flow deviation, ensuring a consistent annular gap shear field.

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 6 Optimized orifice: micro-cone + cylindrical hybrid outlet with chamfers and mirror polishing to minimize shear discontinuities and filament hang up, supporting a wide process phase inversion window.

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 7 Multi-hole modularity: supports expansion to 8/12/16/20/32 holes; symmetric layout and optimized thermal paths reduce the impact of thermal drift and assembly stress on uniformity.

Trustech 6 hole FCT 5th Generation hollow fiber me

Trustech hollow fiber Membrane spinneret FCT 5th G (3)

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.

Trustech 6 hole FCT 5th Generation hollow fiber me (2)

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.

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 11 Modular Design with Separate Spinneret Core and Flow Channel Plate: No positioning pins needed, making assembly and disassembly as simple as using a screw.

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 12 Integrated Spinneret Core: High precision and good concentricity.

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 13 Robust Needle Design: The Bore liquid needle is not easily damaged.

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 14 Easy Cleaning and Maintenance: User-friendly cleaning and maintenance, friendly for non-professional operators

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 15 High Reliability: Stable and consistent performance.

Hollow Fiber Membrane Spinneret, FCT 5th Generation spinning 16 Extended Service Life: 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	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.

Conventional design

FCT design

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