ISO 3011-2021 pdf download

ISO 3011-2021 pdf download.Rubber- or plastics-coated fabrics一 Determination of resistance to ozone cracking under static conditions. 7 Time intervals before testing Unless otherwise specified br technical reasons, the following requirements apply: For non-product tests, the minimum Lime between manufacture and commencement of testing shall be 16 h. The maximum time between manufacture and testing shall be 4 weeks. For product tests, the minimum time between manufacture and commencement of testing shall be 120 h. during which pcnod the test pieces shall be stored at the standard laboratory temperature. The maximum time between manufacture and testing shall be three months, and the maximum time between receipt of the product by the test laboratory and testing shall be two months For evaluations intended to be comparable, the tests shall, as far as possible, be carned out after the sante time interval and at the same temperature. 8 Test conditions 8.1 Ozone concentration The olonc concentratiuli shall comply with the requirensents of ISO 1431-t:2012.9.L 8.2 Temperature The temperature of test shall comply with the requirements of ISO 1431.1.2012.9.2. 8.3 RelatIve humIdIty The relative humidity of the ozonized air shall normally be not more than 6S % at the test temperature. Very high humidity can influence the results, when applicable, for products intended for use in damp climates, the test shall be carned out at a relative humidity in the range of 80 % to 90 %. If this is practicable 8.4 Mounting of test pieces under stress and conditioning The test piece shall be wrapped around the mandrel otthe test piece holder with the surface under test on the outside and the ends of the test piece held by the cbmps tightly enough for the mandrel lust to be able to revolve freely en the test piece, Srvtral test pieces of the same thickness may be wrapped around a single mandrel. Where multi-ply coatings are to be tested, they may be tested as single-faced fabrics, vulcanized tinder the same conditions as the final inulte.pty product. Where this is not practical, then the rubber compound shall be tested In accordance with ISO 1431.1. The test piece, assembled on its mandrel, shall be conditioned in a substantially ozone- and draught- tree atmosphere at Use standard laboratory temperature br 48 h. after which the test piece shall be placed in the test chamhei’. 9 Procedure WARNING — Ozone Is highly toxic. Appropriate measures shall be taken...