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Kelheim near to developing IR reflecting fibre
30
Jan '16
German manufacturer of viscose specialty fibres Kelheim Fibers said it has completed the next step in the development of IR reflecting fibres.

“During the last months, the incorporation of mineral IR-reflecting particles has been tested in several spinning trials,” a Kelheim press release informed.

Different levels of these particles were integrated into the fibre's core, thereby preserving the fibre's inherent properties, rather than being added as a topical finish using additives.

“The effects of the new method are permanent and cannot be washed out,” the fibre producer added.

According to Kelheim, the trials showed that the new fibre delivers a level of IR-activity that could be proven in measurements of the Total Solar Reflectance Value (TSR).

“Visible light is reflected by 90-95 per cent, while in the near infrared range, a reflectance of up to 90 per cent has been achieved, depending on the wavelength spectrum,” it stated.

“This proves a clear benefit in the reflectance of direct sunlight, where the fibre is capable of providing a cooling effect, for example by protecting the human body from outside radiation,” the company observed.

Kelheim further added that the fibre may also be used in warming applications, where thermal radiation emitted from the body is reflected by these particles back to the body, reducing the cooling effect and keeping the person warm.

“In the mid IR-range an increase of reflectance of about 20 per cent of m-IR radiation was achieved in tests compared to normal viscose,” the press release noted.

As per the company, the fibre can be used for both textile and nonwoven processes, where the fabric can either protect against outside influences or reflect the IR-radiation back to the inside source.

“Comfortable feel-good clothes and functional special clothing are just two obvious applications for our new IR fibre,” Dr. Daniela Bauer of Kelheim Fibres' R&D team said.

“The level of loading can be adapted according to the requirements of the final product, which provides high versatility,” Bauer too added.

“As a next step, the fibre will be tested for its effectiveness in various end-applications in cooperation with our partners,” she remarked.

Kelheim Fibres GmbH is a leading producer of viscose speciality fibres and a preferred supplier of viscose fibres for the tampon industry and manufactures approximately 90,000 tons of viscose fibres annually.

The fibres are used in most diverse applications, from fashion, hygiene and medical products to nonwovens and speciality papers. (AR)

Fibre2Fashion News Desk – India

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