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Assessment on behavior of Dryarn fabric
May '11
The Turin Polytechnic's Department for Materials Science and Chemical Engineering and the Associazione Tessile e Salute (Fabrics and health Association) recently wound up a project to evaluate the thermo-physiological comfort of a 100% Dryarn fabric, compared with equivalent fabrics in cotton, nylon and polyester. This Highly informative study was performed by the LATT laboratory in Biella and the results showed that Dryarn is superior to the other fibres analysed in terms of thermo-regulation, breath ability and drying speed.

During the various phases of the project, Dryarn was subjected to physical laboratory tests aimed at evaluating its thermo-physiological comfort characteristics and to trials involving the wearing of the fabric in a climate-controlled room to test the actual behaviour of a Dryarn T-shirt during sports activity.

PHYSICAL LABORATORY TESTS: The fabric made of Dryarn microfibres was subjected to a comparison test with equivalent fabrics in cotton, nylon and polyester. The results of the tests show that Dryarn guarantees higher performance compared to the other fabrics, in terms of lightness of weight, drying speed and ability to allow perspiration to escape easily: properties that translate into an excellent capacity for thermo-regulation and earning Dryarn the highest comfort index among the fibres tested.

The second phase of the project, the wearing of Dryarn fabric in a room under CONTROLLED CLIMATE CONDITIONS, tested the actual behavior of a T-shirt made of Dryarn when worn under conditions of high exertion with significant perspiration. These tests were fundamental for evaluating the reaction of the fibre during sporting activities and to compare it to the results obtained from T-shirts similarly manufactured but in cotton and polyester respectively.

The test was conducted inside a climate-controlled room under constant temperature conditions °C) and relative humidity %). The athletes who took part in the test rode on a Cyclo Ergometer (inside the room) on which it was possible to monitor the effort expended, metabolic responses and heart rate. During each single test ride, the mean skin temperature, temperature and humidity of the T-shirt/skin microclimate, loss of moisture (through perspiration) and speed of drying of the T-shirts, both during the various test phases and at the end of the activity, were monitored.

The test was performed in four phases: initial acclimatization minutes), three phases of physical exercise ? minutes each) with a 10-minute rest between each and a final 30-minute phase to recuperate. The combination of data on the physiological skin, the physical characteristics of the fabrics and the subjective feedback from the group of athletes involved enabled specific correlations to be calculated for the evaluation of comfort.

“In all the parameters monitored during the tests carried out on volunteers, the advantages of Dryarn over cotton for theproduction of sportswear emerged quite clearly. The athletes wearing the Dryarn T-shirt had a lower heart rate and therefore less cardio circulatory stress. In particular, the thermo-physiological comfort of the Dryarn T-shirt is principally underpinned by its excellent thermo-regulatory capacity (less variation in skin temperature around the mean value) thanks to its low thermal resistance, its breath ability and the management of perspiration that is allowed to escape from the skin to be rapidly released onto the outside of the fabric, thus guaranteeing swift drying. The Dryarn fabric therefore guarantees an excellent performance both during exercise and during the rest/recuperation phases".

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