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Impulse Sonderausgabe A+A 2013 EN

seite 2 | impulse | 3/2013 In 10 days* we test PPE down to the very last fibre Using the standard DIN EN ISO 11612 „Protective clothing to protect against heat and flame”, here is an example of the test sequence and process. *presuming the test capacities are available DAY 01 DAY 04 test is performed a total of 10 times: 5 DAY 09fabric furnished with an incision. The times in the warp or lengthwise direc- tion and 5 times in the weft or cross- wise direction. The strength required for a further tear of the fabric must be more than 15 Newtons. Still more service from In addition to the further tear strength, a single source the tensile strength is determined by and monitor the next process steps or corner. The test sample must not of at least 300 Newtons both in the the time period until the temperature • UV-Protectional must withstand a tension strengthve the test material which measuresa flame is applied to the surface and/Workmenship•--flame. A calorimeter is located abotil the test sample tears. The materito a flame effect for ten seconds andFit•-in the test device and exposed to adetermines the strength required untreatment. Here the fabric is exposedof wear comforttension testing machine which thenmes, the test specimen is clampedout in the new state and after the pre-Evaluation and optimisationtensioning the test specimens in the-To test the thermal resistance to flaThe burning behaviour test is carried-- The materials to be tested arrive in goods-in at the Hohenstein Institute. They are registered and the test con tract is confirmed. The specified re gistration number is used to assign of the tests. continue to burn either up to the top crosswise and lengthwise directions. above the test specimen has risen to Colour measurement andcorner or the side corners, nor must-24°C over the start temperature. (Ex DAY 02 it melt, nor must the sample develop ample: Start temperature 20°C – time whiteness assessment holes or manifest melted dripping. In DAY 07 period until the temperature has ri- Technical specifications addition, the afterburn time and the sen to 44°C) Suitable for leasing afterglow time must be less than 2 seconds. Hygiene, environment, medicine DAY 10 - ready • Hygiene inspections DAY 05 • Antibacterial, antimycotic Once all the tests have been perfor- and antiviral efficacy So that the results can be reproduced med, the test report is compiled. If the • Interaction between textiles at any time, the test samples for the The burning behaviour of the mate- materials have successfully passed and humans tests are prepared and acclimatised, rials is also performed after the wash all the tests, then, depending on the • Skin irritation which means that they are exposed cycles. For example, functional fini- customer order, the certification can • Neuromarketing for 24 hours to a constant tempera- shes of the materials can be tested for take place. At the Hohenstein Insti- ture and air humidity. their effectiveness after cleaning. The tute product developments and inno- Testing for harmful substances As soon as the test samples have fini- test is carried out as in the new state. vations can be tested for their protec- and sustainability DAY 03 shed their wash cycles, the test spe- A flame is applied to the surface and/ tive effect for the wearer within only • According to OEKO-TEX®Standard 100-10 days. In this regard materials tes-or edge. After cleaning the same specimens are acclimatised again. The previously applied measurements are cifications as in the new state must ting not only forms the basis for the • STeP-Certification by measured out and the dimensional be fulfilled (see day 4). product certifications but also ensu- OEKO-TEX® (Sustainable changes calculated. The dimensional res that the wearer‘s PPC protection Textile Production) changes of fabrics and/or laminates is continuously improved. must not be more than ±3 % in the Chemical and technologicalDAY 08 lengthwise and crosswise directions. You can find videos about se- textile tests • Performance lected laboratory tests on the On the test sample itself, measure- • Derterming the material ment distances for the verification of DAY 06 Hohenstein Institute’s YouTube composition channel. the shape change through washing • Behavior during care process To visit our channel, please are affixed and measured. Then one • Down and feathers simply scan the QR codes on part of the test sample is pre-treated. this page, or type: In a normal scenario this consists of 5 The radiant heat test measures Contract research and domestic washes, but it can also be an the shielding of a radiation source www.youtube.com/ public research industrial processing process. A wa- through the test material. The test HohensteinInstitute shing cycle consists of the complete sample is stretched on a cradle and and many more.. in your browser. washing and drying process. This test The verification of the further tear exposed to a heat flux of 20 kW/m2 . preparation lasts approx. 1 - 2 days. strength of textiles determines the This determines the time required to The non-washed samples are then cut strength which must be applied in increase the start temperature (20°C) to size for the tests in the new state. order to effect a fast tear-through of a to 24°C using the specified heat flux. Imprint Hohenstein Institute +49 7143 271 0 Schloss Hohenstein info@hohenstein.de 74357 Bönnigheim www.hohenstein.de www.hohenstein.com/ppe October 2013


Impulse Sonderausgabe A+A 2013 EN
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