Sealed Coaxial Needle Kit – Complete Set, 2 or 3 Layers

Our Sealed Coaxial Needle Kit is the ideal solution for core-shell electrospinning with any type of polymer, even in the most corrosive solvents — a complete, ready-to-use set at an accessible price.

SUITABLE FOR CORE-SHELL ELECTROSPINNING

All our needles are manufactured in AISI 316 stainless steel and assembled entirely by a laser welding process. Thanks to the manufacturing material, it is possible to spin any type of polymer at temperatures up to 120 °C in the standard configuration.

WHAT ADVANTAGES DO YOU GET FROM USING THIS KIT?

With coaxial needles you gain the ability to spin two or more polymers simultaneously within the same fiber, producing fibers with an inner core and outer shell.

This is useful when a single material would force a compromise between two properties — for example, one material offers the desired mechanical strength, while a different material shows a better degradation rate.

Two standard versions are available, with two or three concentric layers, customizable upon request.
These needles are very compact and make it possible to create high-productivity configurations: they can be assembled in parallel up to tens of units thanks to a simple, solid mechanical structure and the distribution of solutions through Luer-UNF connections.

The rear threaded hole permits both fastening to the support structure and a stable connection of the high voltage.

LOOKING FOR A MORE VERSATILE SOLUTION?

In our Modular Coaxial Needle Kit, every concentric needle is independent, so it can be equipped with a different diameter and supplied with solutions of different materials through standard Luer Lock connections.

PRODUCTS INCLUDED

• Sealed Coaxial Needles (2 or 3 layers)
• Dielectric Support
• Luer-UNF Fittings: 2 pcs (2 layers) / 3 pcs (3 layers)

STANDARD DIMENSIONS

Inner needle: G21

• OD: 0.83 mm
• ID: 0.51 mm

Middle needle: G15

• OD: 1.83 mm
• ID: 1.37 mm

Outer needle: G11

• OD: 3.05 mm
• ID: 2.39 mm

COMPATIBILITY

It can be integrated on machines that have a number of syringe pumps equal to the number of layers used.

FREQUENTLY ASKED QUESTIONS

What is the difference between this kit and the Modular Coaxial Needle Kit?

This kit uses laser-welded sealed needles with fixed geometry (G21/G15/G11) — compact, robust and significantly more affordable. The modular kit offers interchangeable tips and full disassembly, at a higher price. If you are starting with core-shell electrospinning, this sealed kit is the most cost-effective entry point.

Can I use this kit with a non-Linari electrospinning system?

Yes. The needles connect through standard Luer-UNF fittings and the dielectric support is free-standing, so the kit works with any electrospinning setup that has one syringe pump per layer and a high-voltage supply.

Is everything I need included?

The kit includes the sealed coaxial needle, the dielectric support and the Luer-UNF fittings. You additionally need syringes, Luer Lock tubing and your electrospinning system with pumps and high-voltage supply.