TL-20M-200 / TL-20M-400

TL-20M

Modular electrospinning for batch production

Develop and scale processes for uniform fibrous membranes. Configure the TL-20M with interchangeable spinneret modules, independent solution delivery and either continuous roll collection or fixed-length thick-mat collection.

Discuss your application Compare TL-20M-200 and TL-20M-400

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Platform & models

Uniform deposition at batch-production scale

Membrane uniformity is the central focus of the TL-20M. Fine-tune the needle array and reciprocating motion, maintain stable flow in each channel, and select the collection mode for the required membrane thickness and length.

Two configurations for process scale-up

Choose the number of spinneret modules and solution throughput for your collection width, target thickness and stable operating conditions.

Compare TL-20M-200 and TL-20M-400
Parameter	TL-20M-200	TL-20M-400
Spinneret modules	2	4
Maximum needle count	300	600
Reference solution throughput	Approx. 100–200 mL/h	Approx. 200–400 mL/h
Fixed-length collection	Up to 1.6 m	Up to 2.75 m
Collection width	200–650 mm, depending on configuration	200–650 mm, depending on configuration

mL/h denotes solution throughput, not dry-fiber output. Actual output depends on solution concentration, material and process conditions.

Spinnerets & materials

Interchangeable modules support multi-needle, needleless and coaxial electrospinning. Choose each module for the solution system and required fiber architecture.

Coordinated control for uniform deposition

Adjust needle count, spacing and placement to suit the collection width and local membrane thickness profile.
Fine-tune array density at the edges or in selected areas to adjust local deposition.
Precision solution metering stabilizes the flow in each channel. A flat, conductive collection surface supports a uniform electric field.
Validate the process with fewer needles before expanding the array.

Reciprocating spinneret motion

Spinneret modules reciprocate in opposite directions to improve coverage across the membrane width.
Y-axis horizontal travel: 300 mm. Speed: 1–40 mm/s.
Z-axis adjustment sets the spinning distance from 8 to 30 cm via the touchscreen.
Set motion parameters for the material and target thickness profile.

Multi-needle array system

Configure 2–4 spinneret modules with 16–150 needles per module, depending on the configuration.
Process 2–4 different solutions simultaneously. Combine relative module motion and needle layout to improve deposition uniformity.
Precision solution delivery supports processes that require consistent results from batch to batch.

Multi-needle arrays in operation

The photographs show an example with 100 needles × 4 modules. Select the operating needle count according to the solution formulation and process stability.

Linear needleless spinneret

Optional module. Structural tips concentrate the local electric field.
The design simplifies cleaning and reduces needle consumables and individual needle maintenance.
Validate solvent evaporation rate and spinning stability when selecting the module.

Annular needleless spinneret

Optional annular module for needleless electrospinning.
Easy cleaning supports processes requiring frequent maintenance.
Combine it with other spinneret modules to match the material and production requirements.

Coaxial needle array

Optional module for batch production of core–shell nanofibers.
Independent feeds set the core and shell solution flow rates separately.
Replaceable inner and outer needles maintain concentric alignment. Configure the array size for the process.

Combined electrospinning and electrospraying

Sequential electrospinning of different polymers

Multi-material and composite structures

Spin 2–4 materials simultaneously or sequentially to produce composite structures.
Examples include combined electrospinning and electrospraying, and sequential electrospinning of different polymers.

Aqueous and organic solvent systems

For aqueous systems, fully dissolve the polymer. For organic solvent systems, select a suitable viscosity and evaporation rate.
Match the solution formulation and spinneret configuration to material compatibility, process stability and operating conditions.
Examples include water, DMF, DMAc, DMSO, NMP, THF, HFIP and acetone.

Solution delivery & voltage

Independent precision solution delivery

The separate delivery unit simplifies maintenance and expansion. Servo drives provide stable thrust and precise flow-rate control.
Set the feed rate independently for each channel, including core and shell feeds.
Capacity per channel: 200–500 mL, depending on configuration. Expand channel count to match spinneret modules and materials.
Select wetted components compatible with the solvent in use.

High-voltage supplies and process voltage

Process operating voltage: 40–70 kV, depending on the material, spinneret and spinning distance. This differs from the rated output range of each supply.
Positive output: 0 to +50 kV. Negative output: 0 to −50 kV.
Current range: 0–3 mA. Automatic shutdown above 3000 μA.
Voltage falls from 50 kV to 0 in less than 0.5 s after switch-off. Power-supply accuracy: ±(2.0% rdg + 1 digit).
The optimized needle-array and electric-field layout supports operation at lower process voltages to help reduce unintended sparking and discharge.

Collection modes

Both modes use upward electrospinning, with spinnerets below and the collector above. Select continuous winding for rolls, or repeated deposition on a closed loop for thick mats.

Collection principle schematics, not equipment engineering drawings.

Continuous roll-to-roll collection

A closed-loop stainless-steel belt runs around two rollers and supports the membrane in the spinning zone. The membrane winds immediately after leaving this zone.
Collection width: 200–650 mm, depending on configuration.
Continuous winding length: approximately 200 m, depending on the collection configuration.
Maximum roll diameter: 500 mm. Winding speed: 0–20 mm/min.

Fixed-length thick fibrous mats

Repeated deposition on the closed loop builds membrane thickness over a fixed collection length.
TL-20M-200: up to 1.6 m. TL-20M-400: up to 2.75 m.
Collect on metal substrates such as aluminum foil. Reference thickness: ≥50 μm. Actual thickness depends on the material and deposition time.

Control & maintenance

Touchscreen process control

Set motion, cleaning and other process parameters through the central touchscreen.
Choose separate high-voltage control or control through the touchscreen.
Retrieve approximately one month of process parameter history to support repeat production.

Direct access to operating controls

Physical buttons control spinning and collection start/stop, spinneret positioning, needle cleaning, exhaust and lighting.
A physical emergency-stop button allows prompt intervention.

Automatic needle cleaning during production

Automatic cleaning reduces manual intervention during the production cycle.
Set the cleaning frequency to match the solution and its tendency to clog.
Disposable cleaning media allow straightforward replacement and routine maintenance.

Needle maintenance and replacement

Seal needles with dedicated caps after production.
Simple twist or pull actions allow quick removal and replacement when needed.
Full-array replacement takes approximately 10–20 minutes, depending on needle count and configuration.

Samples & installation

Fibrous membranes and fiber morphology

The photographs show membrane collection on a nonwoven substrate, a fibrous membrane roll, and nanofiber morphology under SEM.

External dehumidification

An external dehumidifier can reduce humidity to approximately 20%–30% RH. Adjust humidity for the material and process.
The external unit is easy to install and maintain in conventional laboratories or production facilities.
Achievable humidity depends on ambient conditions, enclosure sealing and operating conditions.

Protection and operating interlocks

High-voltage, overvoltage and overcurrent protection trigger an alarm when parameter limits are exceeded.
A door-open power interlock and emergency-stop button support prompt interruption of operation.
Static elimination, multi-point grounding and proper operating procedures form part of the installation and operating arrangements.
Match needle layout and operating voltage to the process, together with the appropriate protective devices.

Installation requirements

Install the system in a laboratory or production facility with utilities suited to the solvent and process.
Configure ventilation and exhaust for the solvent system and production conditions.
Provide multi-point grounding and static elimination, and adjust humidity to meet material requirements.

Plan your membrane process

01
Define the product
Specify membrane width, thickness and fiber structure. Choose continuous or fixed-length collection.
02
Select spinneret modules
Choose multi-needle, needleless or coaxial modules for the solution system and required fiber architecture.
03
Scale a stable process
Validate with fewer needles, then increase needle count and solution throughput while checking membrane uniformity and batch consistency.

Customer equipment reference

TL-20M at a research institution

An equipment listing published on the customer’s own website.

South China University of Technology
China · Official University Equipment Page
TL-20M-500
The university’s equipment page lists a TONG LI TL-20M-500 high-voltage electrospinning system. The published configuration includes multi-needle, needleless and coaxial spinneret modules.
Published by the university on 25 June 2025.
View University Equipment Page (Chinese) ↗

Explore institutional and research records →

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