Glass fiber

If long, thin threads are drawn from a melt of glass, the result is glass fibers. These fibers, which can be used very flexibly in technical applications, are used today as optical fibers, in textile fabrics or as fillers in construction chemicals (in construction chemical products) and in glass fiber-reinforced plastics. Thanks to their outstanding properties combined with high cost-effectiveness, glass fiber-reinforced plastics are among the most important construction materials today.

Pros and cons
Glass fiber Properties


  • High tensile and elastic modulus
  • Good damping properties
  • Non-flammable
  • Good chemical resistance
  • Resistant to ageing and weathering
  • Favorable price
  • Alkali-resistant grades available


  • High density (specific weight)

Glass fiber
Manufacturing process

Depending on the application, glass fibers are drawn from a preform or from a glass tank through heated nozzles. The main component of glass is silicon dioxide. Depending on the desired property profile, other metal oxides such as aluminum oxide, magnesium oxide, beryllium oxide or calcium oxide are added. These combinations make it possible to produce glass fibers for different requirements, for example for very high mechanical requirements, very high temperatures or high chemical resistance. Standard fibers for electrical applications and plastic reinforcement are usually made from so-called E-glass (E = Electric).

Order our Glass 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 Glass fiber. See for yourself.

If you want to know more about the technology and quality of our Glass 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 Glass fiber for your application or have an exact requirement profile, which the used Glass 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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