BS ISO 675:2014 pdf free

BS ISO 675:2014 pdf free.Textiles一Woven fabrics一Determination of dimensional change on commercial laundering near the boiling point
A horizontal cylindrical machine with rotating cage and reversing mechanism shall be used. The cage should have a diameter between 400 mm and 600 mm and a peripheral speed of 50 m/min to 55 m/min.
Other diameters may be used as a temporary measure, provided that the rotational frequency is adjusted to give an equivalent peripheral speed.For preference, three or four fins or “lifters” about 80 mm wide, equally spaced around the interior of the cage and extending its full length, should be used. Either a single fin or two fins may be used,however, provided that equivalent results can be obtained.
The cage shall turn at such speed that the load is lifted by the fins and falls back into it. (A peripheral speed of 54 m/min has been found satisfactory.) The cage shall make 5 to 10 revolutions before reversing its direction.The machine shall be equipped with heating facilities, such as live steam, gas or electricity, and with an outlet large enough to permit discharge of all water from the machine in less than 2 min.
A thermometer in a suitable well, or equivalent equipment, shall be provided to indicate the temperature of the water to within 1 °C during the washing and rinsing, and there shall be an outside water gauge to indicate the level of the water in the wheel.The mass of the load to be run in the machine shall be between 8 kg and 50 kg of air-dry fabric per cubic metre of cage space, including the volume of the fins. The load shall be made up of test specimens and as much other similar fabric as is required. The quantity of water used shall be sufficient to cover the load,the level being situated at a height from 1/7 to 1/3 of the inside diameter of the cage.
A laundry-type centrifugal extractor with perforated basket, or equivalent apparatus, shall be used and shall be capable of adjusting the moisture retention to a range between 50 % and 100 % (m/m) based on the air-dry mass of the fabric.Any other apparatus that will give equivalent results without fabric distortion may be used, for example,a rubber roll wringer which could pass the specimen through the rolls along a diagonal line without altering its dimensions.BS ISO 675 pdf download.