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1、International Standard INTERNATIONAL ORGANIZATION FOR STANDARDIZATION*MEYHAPOfiHAR OPI-AHM3ALWlfl n0 CTAHAPTbl3ALWlORGANISATlON INTERNATIONALE DE NORMALISATION Textile floor coverings - Determination of thickness loss after brief, moderate static loading Revetements de sol textiles - D Conduct the t
2、est in the Standard atmosphere for testing textiles. Make all determinations of thickness to the nearest 0,l mm. b) the thickness loss after recovery as the differentes be- tween the initial thickness and the three values of thickness after recovery for 15, 30 and 60 min. In Order to ensure that the
3、 specimen is held flat, place a guard ring centrally on the specimen so that its centre coincides with that of the presser foot. Keep the guard ring in the same posi- tion throughout the entire test procedure. The ability of recovery of a textile floor covering tan be indicated by a diagram showing
4、the remaining compression after the removal of pressure at the various times of recovery. 8.2 Measurement of initial thickness 9.3 Example Determine the initial thickness in the centre of the specimen under the Standard pressure before the application of the specified pressure using the method speci
5、fied in ISO 1765. Initial thickness under Standard pressure the 10,3 mm 83 . Measurement of thickness under pressure Thickness under the pressure of 220 kPa 5,6 mm Immediately after the determination of the initial thickness (see 8.2) apply a pressure of 220 kPa to the specimen without shock. Ensure
6、 that the specimen is neither touched nor moved during the procedure. After exerting this pressure for a period of 2 h, measure the thickness under that pressure. Then remove the pressure on the specimen without touching or removing the specimen. Thickness after 60 min recovery 9,l mm Thickness loss
7、 10,3 - 5,6 = 4,7 mm Thickness loss after recovery 10,3 - 9,l = 1,2 mm 10 Test report 84 . Measurement of thickness after recovery The test report shall include the following particulars : Measure the thickness of the specimen after recovery periods of 15 min, 30 min and 60 min, using the method spe
8、cified in ISO 1765. a) that the procedure was conducted in accordance with this International Standard, and details of any operations not included, or optional; b) the number of specimens tested; 9 Expression of results c) arithmetic means specimens tested; of the initial thickness of the 9.1 Calcul
9、ate the following values for each specimen tested, and also the arithmetic means of the measurements on all specimens tested, to the nearest 0,l mm : d) arithmetic means specimens tested; of the thickness under pressure of the a) initial thickness under the Standard pressure; e) arithmetic means of
10、the thickness at various times of recovery of the specimens tested (if required, the ton- fidence interval should be recorded); b) thickness under the pressure of 220 kPa; c) thickness after recovery for 15 min for 30 min for 60 min fl thickness Ioss; 9) thickness loss after recovery. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 10:15:21 MDTNo reproduction or networking permitted without license from IHS -,-,-