#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.

Europe is committed to recycling end-of-life wind turbine blades

Starting in 2026, Europe’s wind energy industry has committed itself to ensuring that wind turbine blades do not end up in landfills once they reach the end of their service life. The EU-funded research project REWIND is exploring ways to reuse this composite waste. The German Institutes of Textile and Fiber Research Denkendorf (DITF) are one of 13 project partners from seven countries.

ADD-ITC 2026 publishes preliminary conference program

The organizers of the Aachen-Dresden-Denkendorf International Textile Conference (ADD-ITC) 2026 have released the preliminary program for this year's event, which will take place on November 26–27, 2026, at the International Congress Center Dresden. The conference is expected to attract between 500 and 700 participants from industry, research, and academia.

Networking Day 2026: Industry stakeholders unite around textile recycling

In 2026, the Industry Research Group (IRG) Polymer Recycling once again brought together some of the key stakeholders in textile recycling for its annual Networking Day. This year, the event took place at EREMA’s premises in Ansfelden, Austria. It brought together key players from across the textile recycling value chain for a day of structured exchange and in-depth discussions.

Smart textiles reversibly change shape in an energy-efficient manner in response to ambient temperature

Self-actuating textile structures are used in a wide range of applications, such as medical technology, automation, architecture, agriculture, and the apparel industry. An example is the use of shading nets in greenhouses, which can be deployed and retracted depending on the sunlight intensity. The German Institutes of Textile and Fiber Research Denkendorf (DITF) are developing textiles based on shape-memory polymers with reversibly controllable geometry.

Asia's fashion extravaganza CENTRESTAGE returns in September

Asia’s premier annual fashion event CENTRESTAGE--organised by the Hong Kong Trade Development Council (HKTDC) and sponsored by the Cultural and Creative Industries Development Agency (CCIDA) of the Government of the Hong Kong Special Administrative Region (HKSAR) will return to the Hong Kong Convention and Exhibition Centre (HKCEC) from 2 to 5 September. One of the flagship programmes of the third "Hong Kong Fashion Fest", CENTRESTAGE will bring together some 270 brands from 24 countries and regions and will feature more than 40 spectacular events, including over 30 fashion shows.

SAITEX reports efficiency gains and greater transparency in 2025 Impact Report

Vietnam-based denim manufacturer SAITEX has published its 2025 Impact Report, documenting progress in resource efficiency, chemical management, digital traceability and knowledge sharing across its manufacturing operations in Vietnam and the United States. Rather than focusing on sustainability ambitions, the report presents operational data, manufacturing developments and lessons learned from the past year.

Aid by Trade Foundation presents annual report for 2025: Market position and impact of sustainably verified natural fibres strengthened

Despite global supply chain challenges, the Aid by Trade Foundation (AbTF) was able to further expand its international role in promoting sustainably verified natural fibres in 2025. In doing so, the foundation remains true to its fundamental approach of leveraging market forces. Last year, it generated total revenues of EUR 7.8 million; this included EUR 6.7 million collected through the successful marketing of four standards: Cotton made in Africa (CmiA), CmiA Organic, The Good Cashmere Standard (GCS), and the Regenerative Cotton Standard (RCS). AbTF invested the resulting income in projects aiming to protect biodiversity, support women, increase transparency in the textile supply chain, and implement its verification system.

Barmag presents metering pump solutions at ASE China

From September 15 to 17, 2026, Barmag’s Pumps Division will present its solutions for the precise delivery and metering of adhesives, sealants, and other high-viscosity media at ASE China at the Shanghai New International Expo Centre. The focus of the exhibition will be on high-precision gear metering pumps that help plant managers sustainably optimize material usage, process stability, and product quality. (Booth E4235).