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The Spinneret
Winter 2024 - 2025

A Quarterly Newsletter from ramé-hart devoted to Coaxial, Triaxial, Quadaxial and Custom
Spinnerets used for Electrospinning, Bioprinting and Related Applications
 

Air and Water Filtration Materials Made with Precision ramé-hart Spinnerets

In today’s world, the demand for clean air and water is more critical than ever. From industrial facilities needing efficient air purification systems to municipalities prioritizing clean drinking water, advanced filtration materials play a vital role in safeguarding health and the environment. At the cutting edge of new high-performance filtration material development lies a key technology: precision-engineered ramé-hart spinnerets.

The Role of Spinnerets in Filtration Material Production

Spinnerets are critical components in the production of fibers and membranes used in air and water filtration. By controlling the flow of polymer solutions or melts, spinnerets enable the formation of fine fibers or pores with uniform size and structure. This precision ensures optimal filtration performance, such as capturing microscopic particles, bacteria, or harmful pollutants, while maintaining efficient flow rates.

Magnified view of filter material fabricated using a ramé-hart coaxial spinneret

Hollow filaments offer a promising solution for membrane fabrication processes. Researchers in Finland have developed a novel method for creating these hollow filaments by dissolving cellulose in an ionic liquid and using coaxial dry–jet wet spinning with a ramé-hart Custom Coaxial Needle.¹ The process is particularly advantageous due to its environmental benefits, including high recycling rates for the ionic liquid and reduced ecological impact compared to traditional fabrication methods.

When it comes to filtration, even minor inconsistencies can compromise material performance. For example, uneven fiber diameters can create weak points or reduce the material's ability to filter contaminants effectively. Precision spinnerets solve this challenge by providing consistent, repeatable results, enabling manufacturers to produce materials with:

• Tighter pore size distribution for enhanced filtration accuracy.
   
• Improved mechanical strength to withstand high pressures and prolonged use.
   
• Customizable properties for specific filtration needs, such as hydrophobic or hydrophilic surfaces.

In an effort to provide maximum control over the spinneret specifications, the ramé-hart Custom Coaxial  Needle product offers the customer nine different user-configurable variables.² 

Innovative Spinneret Designs for Filtration Applications

At ramé-hart, we specialize in custom spinneret designs tailored to your unique requirements of filtration applications. Some of our most popular solutions include:

• Custom Coaxial Spinnerets: Used to produce core-sheath fibers with dual functionalities, such as an absorbent core and a protective outer layer.

ramé-hart Custom Coaxial Needle

• Custom Triaxial and Quadaxial Spinnerets: Used for production more advanced multi-layer nanofibers and multi-layer fibers with hollow cores.

ramé-hart Custom Triaxial Needle

• Custom Multi-channel Spinnerets: Ideal for creating fibers with multiple cores used in reverse osmosis and other membrane technologies.

ramé-hart Multi-channel Spinneret with (3) inner core needles

• Spinneret Arrays: Designed for high-throughput production of non-woven filtration materials, ensuring scalability without compromising quality.

ramé-hart Prebuilt Circular Spinneret Array Kit

Driving Innovation in Filtration Technology

Beyond traditional air and water filtration, our spinnerets are enabling innovations in areas like:

• Electrospun nanofibers, which provide ultrafine filtration for removing nanoparticles and viruses.
   
• Hybrid materials, combining filtration with catalytic or antimicrobial properties for specialized applications.

Partnering with You for Success

Whether you’re developing next-generation filtration materials or optimizing existing processes, our team is here to help. If you have a spinneret design that does not conform to any of our prebuilt or custom spinneret products, we can still make it for you. We are always building special orders per our customer's requirements. If your spinneret requirement falls outside the ordinary, contact us with your design parameters and we can make it for you. 

To learn more about our precision spinneret product line, visit our website or contact us. We're your partner in making filtration products that promote a create a cleaner, healthier world.

Notes
¹ See https://doi.org/10.1021/acs.biomac.3c00984
² For ordering instructions, see BOX 2 on this page https://www.customspinnerets.com/coaxial. Step 2 will take you to the worksheet where you can find the nine user-adjustable design variables.

Coupon Savings

If you are buying several spinnerets (or more), feel free to take advantage of the coupon below and get $100 off your order. Limit one coupon per customer. Cannot be combined. Cannot be used on overstock items. Orders must be placed online at www.ramehart.us and paid for with credit card. Both offers expire 1-Apr-2025.

Regards,

Carl Clegg
Director of Sales
Phone 973-448-0305
www.customspinnerets.com
www.ramehart.us
www.ramehart.com
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