Skip to main content
RISE logo

Air-gap spinning

Air-gap (dry-jet wet) spinning is a method used for man-made fiber production. In this method, a polymer solution is extruded through a spinneret and travels through an air gap before entering the coagulation bath. Air gap allows better polymer orientation prior to its solidification compared to wet spinning, resulting in higher fiber strength.

Purpose

We offer trials at bench- or laboratory-scale, enabling the development of air-gap spinning process. The trials can include exploring new polymer solvents, raw materials, and production techniques.

Method

With our expertise and know-how, we conduct research trials, enabling feasibility studies for air-gap spinning process development.

Bench-scale equipment for air-gap spinning:

  • Two lines for air-gap spinning.
  • Flexible equipment with possibilities of inline coagulation, stretching and washing, spin finish application, drying and winding.
  • A library of spinnerets with different number of holes, hole diameters, L/D etc.
  • Dope volumes: from 15 mL to 350 mL.
  • Capacity: 1-50 g dry fiber per day.

Delivery

Our goal is to provide air-gap spinning services that serve the specific needs of each customer. Deliverables may include optimized process parameters summarized in a report or actually produced fibers with specific properties. For further details, please feel free to reach out to us.

More about our services in air-gap spinning

Example of our air-gap spinning equipment

 

Example of air-gap spinning

Our research topics

In air-gap spinning, we focus on different combinations of bio-based polymers, both from primary and secondary sources. Examples of what we work with include:

  • Cellulose -based fibers for application in textiles, both from primary raw materials, such as wood, and secondary sources, such as agricultural waste or recycled textiles.
  • Bio-based precursors for carbon fiber production, spun from lignin and cellulose.

Lyocell

Production of Lyocell involves dissolving cellulose pulp in a solvent, N-Methylmorpholine N-oxide or NMMO. Pulp is first mixed with a water mixture of NMMO, then water is evaporated to achieve the monohydrate form of NMMO, resulting in pulp dissolution. Subsequently, air-gap spinning is conducted to produce Lyocell fibers. With our expertise and state-of-the-art equipment, we offer services for the development and optimization of Lyocell fiber spinning process.

Ionic liquids

Ionic liquids, with their unique solvent properties like low volatility and high thermal stability, offer capabilities for dissolving cellulose and other polymers. Resulting dopes can be used for air-gap spinning of fibers with high mechanical properties. Our ongoing research and development efforts aim to optimize the utilization of ionic liquids for fiber spinning, providing sustainable and high-performance fiber products.

Selected publications

Other relevant services

Request for quote

CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

* Mandatory

By submitting the form, RISE will process your personal data.

Service

Air-gap spinning

Price

Price on tender

Oleksandr Nechyporchuk

Contact person

Oleksandr Nechyporchuk

Forskare

+46 10 228 48 12

Read more about Oleksandr

Contact Oleksandr
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

* Mandatory By submitting the form, RISE will process your personal data.

Jenny Bengtsson

Contact person

Jenny Bengtsson

Forskare

+46 10 228 47 79

Read more about Jenny

Contact Jenny
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

* Mandatory By submitting the form, RISE will process your personal data.

Contact

Cannot find what you are looking for or are you curious about how we can help?

Send message
CAPTCHA
This question is for testing whether or not you are a human visitor and to prevent automated spam submissions.

* Mandatory By submitting the form, RISE will process your personal data.