#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.

Fraunhofer IAP paves the way for "Green" carbon fibers

A new pilot plant in Guben is set to enable the production of bio-based carbon fibers. The plant is part of the Carbon Lab Factory Lausitz and will make an important contribution to the transformation of the Lausitz region—from a traditionally raw material- and basic industry-oriented region to a hub for innovative high-performance materials. The German federal government and the state of Brandenburg are providing the Fraunhofer Institute for Applied Polymer Research IAP with 53.3 million euros for this purpose.

Hof University develops sustainable textile coating for the fashion of tomorrow from mushrooms

Clothing is often treated as disposable: T-shirts for events, general merchandise, or short-term campaigns frequently end up in the trash after only a few uses. This is particularly problematic given that their production still largely relies on fossil-based materials. This is precisely where a new research project at Hof University of Applied Sciences comes in.

Textilfabrik 7.0 launched: Mönchengladbach becomes a real-world lab for sustainable textile production

With the official kick-off event of the Textilfabrik 7.0 (T7), a major transformation project for the German textile and apparel industry has been launched in the Monforts Quarter in Mönchengladbach. At the “Textile Roundtable,” an event format organized by the Zukunftsagentur Rheinisches Revier, representatives from industry, research, politics, and the regional economy came together to jointly lay the foundation for CO₂-neutral, circular, and economically viable textile production in Germany.

Modernizing Needling – DiloGroup at Techtextil & INDEX 2026

With the theme “Modernizing Needling”, the DiloGroup presents a comprehensively enhanced portfolio for needling technology. The objective is to further increase the performance and application range of needlefelt production lines in terms of productivity, flexibility, and the development of new products, thereby meeting the growing demands of modern technical textiles.

New Gravimax MMX-R X-ray sensor platform opens up new application fields

The demands placed on quality control in web-based production processes are increasing: materials are becoming more complex, basis weights are varying more widely, and at the same time, pressure is growing to make processes more efficient and transparent. Precise measurement data across the entire web width has therefore become a key factor in ensuring stable production processes. With its new Gravimax MMX-R sensor platform, Mahlo introduces a radiometric measurement solution designed to set new standards in determining basis weight and material composition. The platform combines advanced X-ray technology with newly developed signal processing, enabling measurement tasks that previously often required multiple sensor technologies.

Carbios confirms Longlaville plant in France following financing progress

Carbios has reaffirmed its plans to build its Longlaville plant in France within a project financing framework, targeting the start of production in the first half of 2028. The company also reports a solid cash position of around €60 million at the end of 2025 and has appointed Benoît Grenot as Deputy Chief Executive Officer to support the execution of its strategic projects.

KARL MAYER strengthens partnerships in the composites industry at JEC World 2026

KARL MAYER further strengthened its role as a reliable and competent partner to the composites industry at JEC World 2026. The global market leader in textile machinery manufacturing used the trade show to meet key customers, establish numerous new contacts, and engage in in-depth technical discussions.