German manufacturers of sports textiles are among the most innovative companies in the textile industry. Researchers at the Hohenstein Institute in Bönnigheim are helping these companies to improve the functional properties of their textiles by developing practical construction guidelines.
One of the ways of assessing the comfort characteristics of sportswear and other textiles at the Hohenstein Institute is by using the thermo-regulatory articulated manikin Charlie.
The physiological comfort characteristics of sports textiles can be represented using the German school marks system from 1 (= \"very good\") to 6 (= \"unsatisfactory\").
In a recently completed research project: (AiF No. 15481 N), with funding from the Federal Ministry of Economics and Technology (BMWi) provided through the Federation of Industrial Research Associations (AIF), they drew specific conclusions about the physiological comfort characteristics of a variety of different types of knitted garments. The textile industry will be able to use the construction guidelines that resulted from the research work to continue developing and optimising functional clothing for all kinds of different sports.
The research project entailed investigating a total of 34 assorted knitted fabrics in respect of their thermo-physiological characteristics. These samples varied in terms of their fibres (PES, PP, PA, WO and CO and some mixed fibres), weight per unit area (100 to 329g), surface finish (hydrophilic, bioactive) and knit structure(e.g. single-jersey or pique). Specially selected representative samples were tested in controlled trials involving volunteers wearing them in a climate-controlled room. The skin model was used to measure thermo-physiological properties, i.e. how heat and moisture are transported through the textile. When this data was combined with the results of skin sensory testing, it was possible to work out a comfort rating for each sample. The textiles were assessed along the lines of the German school marks system, from 1 = "very good" to 6 = "unsatisfactory".
On average, all the knitted sports textiles that were investigated received marks that were satisfactory or better for sports textile comfort (TK(S)). Nine samples were awarded marks of 1.0 to 1.5 (= "very good"). Chemical fibres were at a distinct advantage when it came to transporting liquid perspiration and the way they dried. On the other hand, the natural fibre samples made of wool and cotton had the edge when it came to retaining perspiration. Comparing pairs of samples of textiles where the main fibre was polyamide, but with and without a hydrophilic finish, showed that the hydrophilic finish had a negative effect on the level of comfort, because the fabric took longer to dry. However, applying a hydrophilic finish to samples made of propylene or a mixture of cotton and polypropylene gave a better result for comfort because they did not stick to the skin so much.Contact:
We must also thank all members of the project support committee who, with their specialist expertise and willingness to contribute to the discussions, helped ensure a successful conclusion to the project.
Rose-Marie Riedl | idw
New design improves performance of flexible wearable electronics
23.06.2017 | North Carolina State University
Plant inspiration could lead to flexible electronics
22.06.2017 | American Chemical Society
An international team of scientists has proposed a new multi-disciplinary approach in which an array of new technologies will allow us to map biodiversity and the risks that wildlife is facing at the scale of whole landscapes. The findings are published in Nature Ecology and Evolution. This international research is led by the Kunming Institute of Zoology from China, University of East Anglia, University of Leicester and the Leibniz Institute for Zoo and Wildlife Research.
Using a combination of satellite and ground data, the team proposes that it is now possible to map biodiversity with an accuracy that has not been previously...
Heatwaves in the Arctic, longer periods of vegetation in Europe, severe floods in West Africa – starting in 2021, scientists want to explore the emissions of the greenhouse gas methane with the German-French satellite MERLIN. This is made possible by a new robust laser system of the Fraunhofer Institute for Laser Technology ILT in Aachen, which achieves unprecedented measurement accuracy.
Methane is primarily the result of the decomposition of organic matter. The gas has a 25 times greater warming potential than carbon dioxide, but is not as...
Hydrogen is regarded as the energy source of the future: It is produced with solar power and can be used to generate heat and electricity in fuel cells. Empa researchers have now succeeded in decoding the movement of hydrogen ions in crystals – a key step towards more efficient energy conversion in the hydrogen industry of tomorrow.
As charge carriers, electrons and ions play the leading role in electrochemical energy storage devices and converters such as batteries and fuel cells. Proton...
Scientists from the Excellence Cluster Universe at the Ludwig-Maximilians-Universität Munich have establised "Cosmowebportal", a unique data centre for cosmological simulations located at the Leibniz Supercomputing Centre (LRZ) of the Bavarian Academy of Sciences. The complete results of a series of large hydrodynamical cosmological simulations are available, with data volumes typically exceeding several hundred terabytes. Scientists worldwide can interactively explore these complex simulations via a web interface and directly access the results.
With current telescopes, scientists can observe our Universe’s galaxies and galaxy clusters and their distribution along an invisible cosmic web. From the...
Temperature measurements possible even on the smallest scale / Molecular ruby for use in material sciences, biology, and medicine
Chemists at Johannes Gutenberg University Mainz (JGU) in cooperation with researchers of the German Federal Institute for Materials Research and Testing (BAM)...
19.06.2017 | Event News
13.06.2017 | Event News
13.06.2017 | Event News
23.06.2017 | Physics and Astronomy
23.06.2017 | Physics and Astronomy
23.06.2017 | Information Technology