BS ISO 17984:2014 pdf free

BS ISO 17984:2014 pdf free.Machine-made textile floor coverings一Determination of dimensional changes after exposure to heat and/or water
Make all measurements on the conditioned specimen when it is completely flat; this can be achieved by use of the glass plate (see 5.1.2) or other means.
On the conditioned specimen, measure the distance between the edges parallel to the direction of manufacture and between the edges at right angles to the direction of manufacture, each at two locations approximately 200 mm apart. If required by the method of measuring adopted, mark the pair of reference points, e.g. by the use of steel pins (see 5.1.3), approximately 200 mm apart on the edge parallel to the direction of manufacture and also on the edge at right angles to the direction of manufacture. Make all measurements on the back of the specimen to the nearest 0,1 mm.
Products made of discrete layers, e.g. foam-backed constructions, should be measured on both the backing and the use-surface, and the results of both measurements given in the test report.The baseboard should consist, e.g. of metal or marine plywood coated with a plastic laminate, of a size suitable to accommodate the test specimen. Two stop bars, approximately 25 mm wide and 15 mm high,are fitted at right angles along two adjacent sides with a gap of approximately 1 mm at the corner. On each of the two opposite sides, two cut-outs or slots are made approximately 20 mm wide and at least 20 mm long, to accommodate the presser feet of the dial gauge micrometers. The slots are positioned at 1/3 and 2/3 the nominal specimen size (length of side) from the stop bars, and are required to allow the presser feet to move +10 mm from the nominal size of the specimen (see Figure A.1).
Each micrometer has presser feet 20 mm diameter, traverse >20 mm, capable of measuring to 0,1 mm and operating with a force of between approximately 0,5 N and 1 N. The gauges are mounted centrally within the cut-outs or slots with their axes in a horizontal plane and so that their centres are 5 mm above the level of the base. A means of holding the dial gauge presser foot shafts in their maximum position is required.BS ISO 17984 pdf free download.