1、STD-BSI BS EN IS0 100bb-ENGL 1998 W lb24bb9 Ob73558 715 BRITISH STANDARD The European Standard EN IS0 10066 : 1997 has the status of a British Standard ICs 83.100 NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW BS EN IS0 LOO66 : 1998 Flexible cellular polymeric materials - Det
2、ermination of creep in compression STD-BSI BS EN IS0 100bb-ENGL 1998 W lb24bb9 Ob73559 851 BS EN IS0 10066 : 1998 National foreword This British Standard is the English ianguage version of EN IS0 10066 : 1997. It is identical with IS0 10066 : 1991. The UK participation in its preparation was entrust
3、ed to Technical committee PRE4, Testing of rigid and flexible cellular maerials, which has the responsibility to: - aid enquirers to understand the tea - present to the responsible inteniational/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interess
4、 informed; - monitor related intemational and European developments and promulgate them in the UK. A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Stan b) 27 “C f 2 “C and (65 I 5)
5、 ?AO relative humidity for tropical climates. 8.3 Prior to test, the test pieces shall be stored for at least 16 h under the standard conditions given in 8.2. This period of conditioning can form the latter pari of the period following manufacture prior to test (see 8.1). 9 Procedure 9.1 Measure the
6、 original thickness 4 of the test piece in accordance with 6.1. For tests at tempera- tures other than standard (see 8.2), condition the test piece at the test temperature for a period of at least 1 h following the measurement of the original thickness 4. 9.2 Place the test piece in the apparatus an
7、d apply the appropriate compression stress rapidly and smoothly to the test piece in such a manner as to avoid impact. The magnitude of the applied com- pression stress shall be as agreed between the purchaser and supplier. The stress chosen shall produce a creep strain of (2,5 f 0,125) YO. NOTE 2 T
8、he stress applied will usually be between 0.5 kPa and 10 kPa. 9.3 Measure the thickness (d,) of the test piece af- ter 15 min f 1 min, at the test temperature, with- out removing the compression stress and repeat the measurement (d2) after 72 h f 0,25 h, at the test temperature, again without removi
9、ng the corn- pression stress. At the end of the test, remove the compression stress and remeasure the thickness (dR) after the test piece has been allowed to recover for 30 min 2 min at the standard conditions (see 8.2). 10 Expression of results 10.1 The average of the test results from the two test
10、 pieces shall be used in the calculation of the result. 10.2 Calculate the percentage creep strain C from the equation 4 - d2 di C= where d, d2 is the thickness, in millimetres. under com- pression stress after 15 min; is the thickness, in millimetres, under com- pression stress after 72 h. 10.3 Cal
11、culate the percentage compression after recovery i is the thickness, in millimetres, of the test piece after recovery. 11 Test report The test report shall include the following infor- mation: a) a reference to this International Standard; 2 STD-BSI BS EN IS0 LOObb-ENGL 1998 Lb24bb9 Ob735bb T91 D EN
12、 IS0 10066 : 1997 b) a description of the material tested; 9 the percentage compression after recovery; c) the conditioning and test conditions; g) the individual results for e) and f); d) the magnitude of the applied compression stress, h) whether or not the samples were plied and the location of a
13、ny skin. in kilopascais; e) the percentage creep strain value; 3 - STD.BSI BS EN IS0 100bb-ENGL 1998 m lb24bb7 Ob735b7 928 EN IS0 10066 : 1997 Annex ZA (normative) Normative references to international publications with their relevant European publications This European Standard incorporates by date
14、d or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard o
15、nly when incorporated in it by amendment or revision. For undated references the latest edition of the publication referred to applies. Publication Year Title - EN - Year IS0 1923 1993 Cellular plastics and rubbers - EN IS0 1923 1995 Determination of linear dimensions BS EN IS0 10066 : 1998 BSI 389
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