#Research & Development

2025-01-23

Textile daylight management when the winter sun is at an angle

When the sun is currently shining, shading textiles face particular challenges. On the one hand, they should allow as much daylight as possible into the rooms during the dark season. On the other hand, the angle of incidence of the sun's rays is so low that the light is particularly dazzling - much more so than in summer. The German Institutes of Textile and Fiber Research (DITF) are using special light measurement techniques to research suitable shading textiles.

Daylight enhances well-being and has many advantages over artificial lighting. Sensible daylight management can therefore increase the ability to perform and concentrate. As less artificial light is required and solar gains and losses are used for room air conditioning, daylight management also saves energy.

Scheme for determination of the cut-off angle with 1 light source, 2 diffuser, 3 measurement sample on motorized rotating stage, 4 collimating lens, 5 spectrometer. Drawing: DITF

Textile daylight systems influence the incidence of light and are mainly designed to be movable. Internal systems include, for example, roller blinds, folding blinds and curtains. External systems are external venetian blinds, awnings and screens that are guided in front of the façade. The DITF can precisely measure daylight behavior in its light and dark laboratories - even beyond existing standardized test methods.

A test method developed in Denkendorf allows the glare control of solar protection devices to be re-evaluated and has been included in the standard to determine the cut-off angle. This cut-off angle describes the extent to which a solar protection device can block the transmission of direct light from a certain angle of incidence. In the currently valid standard, glare control is quantified using the two characteristics of normal and diffuse light transmittance. For solar protection devices with an openness coefficient of 1-3 %, a higher glare control class can be achieved. This applies to cut-off angles of 65° or less. The cut-off angle is determined by an angle-dependent measurement of the direct light transmittance. During the test, the solar protection textile is rotated in a modified test sample holder from the zero point until the direct light transmittance falls below a defined threshold value. This process is repeated after a gradual azimuthal rotation of the test sample, in other words a rotation of the textile in the test sample holder. Depending on the symmetry properties of the sample, up to 29 individual measurements may be required to determine the cut-off angle.

At the DITF, testing and development facilities for other photometric requirements such as incident light, self-luminous textiles and light-conducting textiles are available for industrial product developments.

The direct transmission of a textile screen when changing the angle of incidence and the specific angle of rotation. Photos: DITF

Towards a circular and sustainable textile industry in Europe: BioFibreLoop has been started

The German Institutes of Textile and Fiber Research Denkendorf (DITF) are coordinating the research project, which is funded as part of the European Union's Horizon Europe research and innovation program. The aim of BioFibreLoop is to develop recyclable outdoor and work clothing made from renewable bio-based materials. The kick-off event took place in Denkendorf on June 26 and 27, 2024.

Stylish design made from sustainable materials – two DITF research projects receive Techtextil Innovation Awards

Materials made from domestic, renewable raw materials reduce CO₂ emissions, prevent microplastics from entering the environment, and close the material cycle. The German Institutes for Textile and Fiber Research Denkendorf (DITF) are developing nature-based alternatives to synthetically produced and predominantly petroleum-based materials. Two research projects have received a prestigious Techtextil Innovation Award. NUO Flexholz and the lignin-coated material FormLig demonstrate that sustainable concepts can meet high standards of functionality and design. Both projects were carried out in close collaboration with industry.

Hohenstein publishes 2025 Sustainability Report

The testing and research service provider Hohenstein has published its latest sustainability report, outlining key progress and strategic initiatives. The report focuses on ambitious CO₂ reduction targets, the company’s new mission statement and the systematic expansion of sustainable services for customers worldwide.

ITM presents cutting-edge textile research at Techtextil

From April 21 to 24, 2026, the Chair of Textile Machinery and High Performance Material Technology (ITM) at TUD Dresden University of Technology will be presenting its current research at Techtextil, the leading international trade fair for technical textiles and nonwovens. In Hall 12.0, Stand D41, the team will be demonstrating how it combines high-performance fibers, AI-supported digital development tools and innovative machine technologies to develop textile solutions for lightweight construction, construction, medical technology and sustainable production from atom to product.

TENCEL™ Lyocell - HV100 achieves global denim availability in six months; Vol. 2 debuts at Kingpins Amsterdam

When TENCEL™ Lyocell - HV100 debuted at last year’s Kingpins Amsterdam in October, 17 mill partners across five countries presented fabrics featuring the new fiber. Just six months on, participation has more than doubled, evolving into a global network that spans nine countries and four continents, signaling both strong industry momentum and growing demand.

Kornit Digital acquires PrintFactory to accelerate the industry’s transition to digital, on-demand production

Kornit Digital Ltd. (“Kornit Digital”, “Kornit” or the “Company”), a global pioneer in sustainable, on-demand, digital fashion and textile production, today announced its acquisition of PrintFactory, a global Netherlands-based technology leader of cloud-native workflow, color management and production automation software. The acquisition represents a strategic step in Kornit’s mission to accelerate the digital transformation of the global fashion and textile industry.

Val:ue Milan unveiled – a curated boutique business hub for high-end apparel textiles

Messe Frankfurt continues to expand its international textile network with the announcement of Val:ue Milan. Moving beyond the traditional trade fair model, Val:ue Milan debuts as a prestigious, boutique-style business hub exclusively dedicated to elected fabrics and accessories for apparel. Taking place from February 3 to 5, 2027, at The Mall in Porta Nuova, the event breaks away from conventional formats through a strictly curated environment designed for strategic networking. By bridging the gap between high-end international manufacturers and top-tier segment buyers, Val:ue Milan further strengthens the Group’s global portfolio with a unique, high-impact concept built around a refined and carefully selected offering.

Closing completed – Mayer & Cie. Global starts business operations

The future of the Mayer & Cie. brand has been secured: Following the successful completion of the purchase agreement for assets in the circular knitting machinery segment of the German traditional company Mayer & Cie., which was signed in February this year, the brand will continue to exist. The transfer of these assets to the new owner, Xu Hongjie, was formally completed yesterday afternoon. This clears the way for the resumption of business operations at the Albstadt site.