BS EN ISO 2313-1:2021 pdf free
BS EN ISO 2313-1:2021 pdf free.Textiles一Determination of the recovery from creasing of a folded specimen of fabric by measuring the angle of recovery Part 1: Method of the horizontally folded specimen.
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3.1 crease recovery angle
angle formed between the two limbs of fabric specimen previously folded under prescribed conditions, at a specified time after removal of the creasing load
Note 1 to entry: In this method, rapid crease recovery angle is obtained at 15 s after removal of the creasing load. Note 2 to entry: In this method, delay crease recovery angle is obtained at 5 mm after removal of the creasing load.
4 Principle
A rectangular specimen of prescribed dimensions is horizontally placed in the flat surface and folded by means of a suitable device and maintained in this state for a specified time under a specified load. This creasing load is removed, the specimen is allowed to recover for a specified time, and then the crease recovery angle is measured.
Attention is drawn to the fact that for some types of fabrics, the limpness, thickness and tendency to curl of the specimen can give rise to very ill-defined crease recovery angles, and therefore an unacceptable lack of precision in making measurements. Many wool and wool mixture fabrics come under this heading.
5.3 Stop-watch.
5.4 Tweezers with broad, spade shaped jaws.
5.5 Paper or metal foil, not thicker than 0,02 mm.
6 Sampling and preparation of specimens
6.1 Cut the samples so as to be as representative as possible ol the wnoie delivery.
NOTE 1 Newly finished fabrics and fabrics that have been subject to washing, dry cleaning or pressing treatments can show a gradual improvement increase recovery. Store samples from such fabrics for at least 6 days under room conditions before specimens are taken.
NOTE 2 The creasing propensity for cellulosic and protein fibre materials varies with time over a much longer period than 6 days, and to cancel any ageing effects, soak these fabrics in water at 20 °C for 30 mm, centrifuge and steam press while still damp before conditioning as in Clause 7.
6.2 In order to ensure a representative average for the fabric to be tested, take specimens in the manner shown in Figure 3. and ensuring that specimens are taken not less than 150 mm from the selvedge. Do not take specimens from creased, wrinkled, bent, or deformed parts. Mark the length, for example (warp) direction on the face side of the fabric.BS EN ISO 2313-1 pdf download.
