Textiles – Determination of the abrasion resistance of fabrics by the Martindale method – Part 2: Determination of specimen breakdown (ISO. Purchase your copy of BS EN ISO as a PDF download or hard copy directly from the official BSI Shop. All BSI British Standards. Textiles – Determination of the abrasion resistance of fabrics by the Martindale method – Part 2: Determination of specimen breakdown (ISO );.
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This post is also available in: Personal protective equipment should be one thing above all else: We ensure that uvex products actually exceed the necessary safety criteria by conducting extensive tests on the material.
We not only examine samples taken from our finished products, but also look at all components, from the raw material and prototype to the accessories. After all, our products can only be sold when we are certain that they offer the level of protection we claim 21947-2 have proved this by conducting the relevant test procedures.
We have set up a number of testing laboratories to ensure we always remain within the threshold values set down in the relevant standards and fulfil our own generally much higher quality demands. This blog series gives an interesting insight into their everyday work. The method is mainly applicable to woven textile fabrics, PE laminates and fleece fabric.
Two sets of test specimens are cut as defined in the test specifications, creating ten samples overall, of which five are taken against the warp and the other five against the weft of the material. The samples are prepared and clamped into the tensile testing machine. Samples are then stretched at a constant rate of extension until the specimen fails, so when it breaks. The maximum tensile force which is measured equates to the maximum force that is recorded in the experiment.
The results of the measurements are based on either the mean value of breaking elongation, both weft and warp samples, or the lowest value recorded.
There are two methods for determining the tear force of fabric: In both cases, ten specimens five weft and five warp are prepared for the test and cut to size as per the respective norm specifications, creating either a piece that resembles a pair of trouser legs or a trapezoid specimen.
This test measures the force that is required to propagate a cut, in other words the tear growth.
BS EN ISO 12947-2:2016
The results of the measurements are based on either the mean value of breaking force, both weft and warp samples, or the lowest value recorded. This testing method is used for flat-woven textiles and ascertains the abrasion rate, which is equivalent to the number of cycles or rubs the material can endure.
Circular specimens are subjected to rubbing motion against an abradant MD at isso defined pressure 9 kilopascal or 12 kilopascal. A defined wool fabric is used as the abrasive agent reference abradant and is mounted on the abrasion machine.
The abrasion test is conducted at fixed intervals until the breakdown point of all specimens is reached — in woven fabrics, this point is when two separate threads are completely broken. Fibre analysis is carried out by examination under the microscope.
How safe is safe? Behind the scenes at the testing laboratory
The result is derived from the mean of four samples. This method determines the dimensional change of textile articles when subjected to normal washing and drying procedures. First isp, the original length and width dimensions are measured, after which the samples are washed and dried according to the specifications. After washing and drying, the specimens are again measured and used to calculate dimensional change between the starting and finishing measurements in per cent.
The next blog entry offering a brief insight into the complex world of material and product testing methods and procedures will be published soon. If you would like to ensure you never miss a post, please subscribe to our RSS feed or like and follow us on our Facebook page. Your email address will not be published. German Personal protective equipment should be one thing above all else: Some of the testing procedures are explained below: Determination of maximum force and elongation at maximum force using the strip method in accordance with EN ISO The method is mainly applicable to woven textile fabrics, PE laminates and fleece fabric.
Determination of the abrasion resistance of fabrics by the Martindale method in accordance with EN ISO This testing method is used for flat-woven textiles and ascertains the abrasion rate, which is equivalent to the number of cycles or rubs the material can endure.
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