ISO 675:1979 pdf free

04-22-2021 comment

ISO 675:1979 pdf free.Textiles — Woven fabrics — Determination of dimensionalchange on commercial laundering near the boiling point.
1.scope and field of application:This International Standard specifies a method for the deter-mination of the dimensional change (shrinkage or stretch) of alltypes of woven fabrics after commercial laundering near theboiling point.
The test has been devised principally for cotton fabrics. If it isapplied to other fabrics such as linen or regenerated cellulosicfibres,sub-clause 9 i) should be consulted.The method is in-tended only for the assessment of dimensional changesundergone by a woven fabric subjected to a single laundering.When it is desired to determine the amount of progressivedimensional change,the test specimen may be washedrepeatedly and the results reported so as clearly to indicate theamount of dimensional change in the laundered specimen ascompared with the original dimensions of theunwashedspecimen and the number of testing cycles to which thespecimen has been subjected.
2.References:Iso 139,Textiles — Standard atmospheres for conditioningand testing.ISo 3759,Textiles – Preparation,marking and measuring offabric specimens and garments in tests for determination ofdimensional change.
3.Principle:Washing of a specimen in a cylindrical reversing laundrymachine under specified conditions. Extraction of excess waterand pressing without preliminary drying. Measurement, beforeand after laundering, of distances marked on the specimen inthe warp and weft directions.
4.Detergent,soap:stock solution may be prepared by dissolving 0,5 kg of soapin 4 litres of hot water. When cooled, this solution forms a thickhomogeneous jelly which may be used as required.
5.1.Wash wheel:A horizontal cylindrical machine with rotating cage and reversing mechanism shall be used. The cage should have a diameterbetween 40 and 60 cm and a peripheral speed of 50 to55 m/min. Other diameters may be used as a temporarymeasure, provided that the rotational frequency is adjusted togive an equivalent peripheral speed.For preference, three or four fins or “lifters” about 8 cm wide,equally spaced around the interior of the cage and extending itsfulli length, should be used. Either a single fin or two fins maybe used, however, provided that equivalent results can be obtained.
The cage shall turn at such speed that the load is lifted by thefins and falls back into it.(A peripheral speed of 54 m/min hasbeen found satisfactory.) The cage shall make 5 to 10 revolutions before reversing its direction.ISO 675 pdf download.

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