Acrylic fiber

Acrylic fibers, also known as PAC or PAN, consist of at least 85% of the monomer acrylonitrile. The comonomers methyl acrylate, methyl methacrylate and vinyl acetate are also used.

Acrylic fibers are used both as textile fibers and in technical form and as precursors for the production of carbon fibers. Depending on the required property profile, acrylic fibers are produced in a dry spinning process or a wet spinning process.

Acrylic filaments have a thickness of 10-40 µm in diameter and, depending on the spinning process, a round or kidney-shaped fiber form.

Acrylic fibers have a high biological and chemical resistance to a variety of solvents, alkalis and acids. Acrylic nitrile fibers are particularly characterized by their high UV resistance. This makes them ideal for outdoor applications exposed to direct sunlight.

Pros and cons
Acrylic fiber Properties


  • Low density 1.17 g/cm3 (specific weight)
  • High toughness and therefore high resistance to crack propagation
  • Good chemical resistance to solvents and lubricants, both weak acids and alkalis
  • Good biological resistance
  • Excellent UV resistance
  • Good heat resistance with decomposition point > 300°C
  • High modulus fiber
  • Alkali resistant


  • Flammable, decomposes when exposed to high heat
  • Poor resistance to strong alkalis and polar organic solvents such as DMF, DMAC, DMSO and ethyl carbonate.

Acrylic fiber
Manufacturing process

Acrylic fibers are produced by copolymerizing at least 85% acrylonitrile with predominantly methyl methacrylate, methyl acrylate or vinyl acetate. The polymerization mainly takes place as solvent polymerization in DMF or DMSO, or as emulsion polymerization. In the next step, filaments can be produced using either the dry spinning process or the wet spinning process. While the dry spinning process mainly produces kidney-shaped and bone-shaped fibers, the wet spinning process tends to produce round fibers. The filaments are then washed, stretched and further processed into spinning cables or staple fibers.

Order our Acrylic fiber Sample box

Contact our fibre experts and discover our extensive STW sample box with numerous raw material samples, personally tailored to your needs and requirements.

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technology and
quality of the fibre

State-of-the-art laboratory facilities, quality management according to ISO 9001:2015, energy management according to ISO 50001:2018 and last but not least the high demands on our own work ensure the high quality standards of our Acrylic fiber. See for yourself.

If you want to know more about the technology and quality of our Acrylic fiber If you want to know, just get in touch with us. We would be happy to advise you comprehensively and help you with our know-how.

You are looking for the perfect Acrylic fiber for your application or have an exact requirement profile, which the used Acrylic fiber must fulfill?

Then you are exactly right, as a technology leader in the field of fibre development and production, we offer you individual solutions and manufacturing processes that ensure constant and reproducible fibre quality.



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