#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.

POLYMERS-5B develops high-performance bio-based polyesters from agricultural waste

The European research project POLYMERS-5B is developing an integrated enzymatic biorefinery to convert agricultural by-products from Mediterranean food production into valuable raw materials for the food, cosmetics and bio-based plastics industries. Using tomato and olive pomace as feedstock, the process aims to recover several product groups from the same biomass stream. The consortium will present its latest technical developments and market findings at Ecomondo 2026 in Rimini on 3 November.

STFI showcases new Textile LAB Professional with focus on climate protection and sustainable technologies

The Sächsisches Textilforschungsinstitut e. V. (STFI) in Chemnitz is organising a themed day on 3 December 2026, focusing on climate protection and the environment. As well as showcasing current applications for green cities and natural fibres for lightweight construction, the event will feature machine demonstrations in the new Textile LAB Professional. Under the motto ‘Design meets Technology’, this networking event will also provide an insight into artistic student projects, thereby facilitating a professional exchange on creative perspectives and modern technologies for climate protection and the environment.

Aachen Summer School: Textiles become smart through 3D printing and origami

From 21 to 29 September 2026, the Aachen Summer School will transform Institut für Textiltechnik (ITA) of RWTH Aachen University into a laboratory of the future: over the course of a week, students will use origami folding techniques and 3D printing to develop active textile structures capable of performing programmable movements. This interdisciplinary event combines theoretical foundations with practical prototyping – from digital modelling right through to functional textile prototypes.

Georg Stausberg, a veteran of the textile machinery industry, takes over as Rieter Group CEO

Georg Stausberg, one of the most experienced executives in the international textile machinery industry, has been appointed Chief Executive Officer of the Rieter Group with immediate effect from 4 November 2026. With more than three decades of industry experience and a long-standing leadership career at Barmag, Stausberg brings extensive technological expertise, international market knowledge and an established network across the global textile industry to his new position.

Jeanologia and BCome connect factory data with Life Cycle Assessment and Digital Product Passports

A new white paper by EIM by Jeanologia and BCome demonstrates how primary environmental data from denim finishing processes can be integrated into a garment's Life Cycle Assessment (LCA) and prepared for use in a Digital Product Passport (DPP). A comparative case study highlights significant improvements at the production stage while also showing how these translate into the environmental performance of the finished garment.

Inside the Making connects denim and sportswear supply chains at Ecomondo 2026

Six European companies are joining forces at Ecomondo 2026 in Rimini to demonstrate how different stages of denim and sportswear production are interconnected. The new initiative, Inside the Making, highlights the importance of cooperation across the textile supply chain in addressing sustainability challenges, from reducing resource consumption to improving transparency and the reliability of environmental claims.

EDANA welcomes definitive EU anti-dumping measures on Chinese PET spunbond

EDANA, the international association serving the nonwovens and related industries, has welcomed the European Commission's decision to impose definitive anti-dumping duties on imports of PET spunbond originating in China. The association considers the measures an important step towards restoring fair competition and safeguarding European industrial capacity.