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Three technologies, three process routes, three families of fiber morphology. This guide breaks them down across principle → process → pros & cons → applications, then matches each route with a ready-to-buy lab solution: AT225 Lab Melt Spinning Machine, AT227 Pilot Scale Melt Spinning Machine, AT235 Bench-top Wet Spinning Machine and AT234A Electrostatic Spinning Machine.
Explore the Machines Get a QuoteAll three technologies turn a polymer into a fiber — but the physics behind them are completely different. Understand the driving force first, and equipment selection becomes straightforward.
A solid polymer is heated to its molten state, extruded through a spinneret, and immediately cooled and solidified into filaments. No solvent is involved — it is the most efficient and most cost-effective mainstream route in the synthetic fiber industry.
The polymer is dissolved in a solvent, extruded through a spinneret, then solidified by air drying, chemical curing or solvent exchange. Wet, dry and dry-jet wet spinning all belong to this route — and it is especially friendly to heat-sensitive polymers.
A high-voltage electric field stretches a polymer solution or melt into an ultra-fine jet, and the resulting nanofibers are collected on a receiver — directly producing nonwoven nanofiber mats.
Process length determines equipment complexity, the number of controllable variables, and the configuration your laboratory actually needs.
There is no "best" technology — only the one that best matches your polymer system and target fiber.
| Route | Advantages | Limitations |
|---|---|---|
| Melt spinning | High efficiency, low cost, wide applicability (suitable for most common engineering plastics and synthetic fibers) | Raw material restricted to melt-stable polymers; high-temperature processing may cause thermal degradation |
| Solution spinning | Applies to almost all polymers; controllable fiber fineness | Solvent risks (toxicity, volatility) and environmental concerns |
| Electrospinning | Ultra-fine fibers, high specific surface area, high porosity, easy functionalization | Limited output, demanding process control, relatively high equipment cost |
The backbone of polyester (PET), nylon (PA) and polypropylene (PP) fiber production, widely used in industrial materials, filtration media and apparel. Whenever a polymer can be melt-extruded and volume or cost matters, melt spinning is the first choice.
Production of acrylic, vinylon, spandex (polyurethane) and cellulose fibers, commonly seen in medical textiles, filtration media and high-end apparel. For polymers whose decomposition temperature is below their melting point, or that discolor or degrade on heating, solution spinning is often the only viable route.
Air purification & water treatment: high-efficiency filter media; medical field: artificial skin, wound dressings, drug release systems and tissue engineering; energy & sensors: energy devices, sensors and catalytic materials.
Once the route is fixed, machine scale decides R&D efficiency. The four machines below cover the complete path from lab samples to pilot-scale production, all designed and manufactured by Anytester (Hefei) Co., Ltd.
The workhorse entry machine for the melt spinning route, used to study the spinnability of polypropylene (PP), polyester (PET), polyamide (PA), pitch (carbon-fiber precursor) and other meltable polymers. Three-zone copper-sheath heating, nitrogen-pressure extrusion, adjustable-speed cooling and motor-driven winding reproduce the industrial melt spinning process at laboratory scale.
| Max. temperature / accuracy | 350 °C / ±0.5 °C, three independently controlled zones |
| Extrusion | Nitrogen pressure, output ≤ 1.5 MPa, accuracy ±0.01 MPa |
| Feed cylinder | 500 mL stainless steel with soaking distribution device |
| Spinneret plate | Hole dia. 0.15–0.5 mm, L:D 2:1–3:1, 1–20 holes (please specify before order) |
| Winding | 0–1400 r/min adjustable / 200 mm roller (customizable, max. bobbin Ø320 mm) |
| Power / dimensions / weight | AC220 V 50 Hz / 870×1310×1860 mm / approx. 320 kg |
Optional accessories: additional spinneret plates, winding rollers, filtering plates and temperature sensors.
When the goal shifts from "can it spin" to "can it scale up", you need the AT227. It extrudes continuously through a single screw (AT227A) or twin screw (AT227B), supports continuous feeding and mixing of multiple materials, and is equipped with a melt pump, cross air blow, oiling device and stretch line to simulate the production spinning process — suitable for POY, FDY and DTY development.
| Screw type | AT227A: single screw ｜ AT227B: twin screw |
| Screw diameter | Ø20 / Ø25 mm, or customized (3 kW heating, 2.2 kW drive) |
| Temperature | RT–320 °C, accuracy ±0.5 °C |
| Melt pump | Max. 400 °C, flow 1.2 or 2.4 cc/rev (60 W drive) |
| Spinneret plate | 24 holes, Ø0.1 mm (customizable), OD Ø90 mm, 316L stainless steel |
| Cross air blow | 150×150 mm (crystal fiber furnace max. 320 °C, 3 kW) |
| Hot stretch (optional) | 2 hot rollers, 70–200 °C, 50–1000 r/min, Ø100 × 125 mm |
| Winding | Max. 2800 r/min, max. bobbin Ø88 mm (customizable) |
| Power supply | 3-phase 220 V 50 Hz |
A bench-top wet spinning line purpose-built for the solution spinning route — designed for new-material research in textiles, macromolecules and beyond, covering novel fiber manufacture, functional fiber development and raw-material spinnability studies. The line follows the wet process: solution barrel (nitrogen-fed) → metering pump → gooseneck → spinneret → coagulating bath → drawing roller 1 → heating chamber → drawing roller 2 → setting chamber → drawing roller 3 → winding roller. It spins filaments of acrylic, vinylon, spandex, cellulose and other rigid fiber-forming polymers.
| Solution barrel | 1 L, 316L stainless steel, quick-open lid with outlet and nitrogen inlet |
| Metering pump | JR1×0.6 gear pump, 0.6 cc/rev (180 W drive, ratio 1:60) |
| Spinneret cap | Ø20 mm, tantalum, 100 holes, hole dia. Ø0.07 mm, with stainless-steel filter |
| Coagulating bath | 316L stainless steel, 1000×160×160 mm, 2 yarn press rods, 0.6 kW heating |
| Drawing rollers (×3) | Nylon rollers Ø55×80 / Ø50×80 / Ø55×80 mm, 10–150 r/min stepless with speed display |
| Heating / setting chamber | Contact-free hot air, 400 mm / 400 mm×2, 250 W, PT100, RT+10–150 °C |
| Winding roller | Single spindle, 10–150 r/min, bobbin Ø55×80 mm, traverse 55 mm |
| Power supply | AC220 V 50 Hz, single phase |
Basic configuration: solution barrel, metering pump, gooseneck, spinneret, coagulating bath and winding device. Heating chamber, setting chamber, drawing rollers, washing bath and oiling bath are all optional to match your process.
The lab workhorse for the electrospinning route. It performs pure spinning of a single polymer, polymer blends, polymer–inorganic blends, and compound (multi-path) spinning of polymers, producing nanofiber nonwoven mats directly on the collecting drum. Compact and portable — ideal for laboratory and small-scale tests.
| Temperature control | RT–80 °C |
| Flow control | 10 mL injector: 0.1–300 mL/h; 20 mL injector: 0.1–600 mL/h |
| High-voltage source | 0–50 kV, pointer-type display |
| Nozzle inner diameter | 0.1–1.6 mm |
| Collecting drum | 150–6000 r/min; drum Ø75 / Ø20 / Ø5 mm, length 150 mm |
| Collecting plate | 210×297 mm (A4 size), transverse / longitudinal speed 1–15 mm/s |
| Power / dimensions / weight | AC220 V 50 Hz, 500 W / 900×600×800 mm / 50 kg |
| Model | Route | Positioning | Best for |
|---|---|---|---|
| AT225 | Melt spinning | Lab samples, process-window exploration | University groups, corporate R&D centers, teaching labs |
| AT227 | Melt spinning | Pilot scale-up, production simulation | Fiber producers, POY/FDY/DTY process development |
| AT235 | Solution (wet) spinning | Bench-top complete line | Acrylic / spandex / cellulose fiber development |
| AT234A | Electrospinning | Nanofiber mat preparation | Filtration, medical materials, energy & sensor research |
Anytester (Hefei) Co., Ltd. · Manufacturer of laboratory testing and fiber sample spinning equipment
Mechanical design, electrical control and software are all developed in-house. Screw configuration, spinneret hole count/diameter and process sections can be customized.
AT225 → AT227 covers melt spinning from lab samples to pilot scale, AT235 covers the wet spinning line, AT234A covers nanofibers — three routes from one supplier.
Every unit ships with an English user manual, quality certificate and standard accessories, backed by remote commissioning guidance and responsive technical support.
Our machines serve universities, research institutes and fiber producers across Asia, Europe, the Middle East and beyond, with mature export experience.
If the decomposition temperature is lower than the melting temperature, melt extrusion will cause thermal degradation. Choose the solution spinning route (AT235 Bench-top Wet Spinning Machine). Only melt-stable polymers such as PET, PA and PP are suitable for the AT225 / AT227 melt spinning machines.
For formulation screening and process-window exploration, choose the AT225 (lab scale, saves material and time). To verify scale-up feasibility and simulate continuous production spinning with oiling and drawing, choose the AT227 (pilot scale). Many customers start with an AT225 and add an AT227 once the process is defined.
Yes. The AT235 uses quick-connect fittings so every unit can be repositioned freely. The basic configuration includes the solution barrel, metering pump, gooseneck, spinneret, coagulating bath and winding device; heating chamber, setting chamber, drawing rollers, washing bath and oiling bath are all optional.
Yes. The AT234A is equipped with a double-path flow pump and supports single-polymer spinning, polymer blends, polymer–inorganic blends and compound spinning. An optional injector heating device also enables melt electrospinning.
Tell us your polymer system, target fiber fineness and throughput requirement — our engineers will recommend the right machine configuration and provide a selection proposal with pricing.
