std 223 橡胶-抗臭氧龟裂-静态拉伸测试《精选》.docVIP

Gummi - Best?mning av sprick-bildning i ozon - Provning under statisk t?jning Rubber - Resistance to ozone cracking - Static strain test 橡胶-抗臭氧龟裂-静态拉伸测试 Orientering Introduction Denna standard ?verensst?mmer i sak med svensk standard SS 16 22 10. The present standard conforms in substance with Swedish Standard SS 16 22 10. 1 Omfattning och till?mpning 1 Scope and application Denna standard ?r avsedd f?r att best?mma best?ndigheten mot sprickbildning hos vulkat gummi n?r detta under t?jning uts?tts f?r luft av viss temperatur och viss ozonhalt. F?rh?llandena utesluter inverkan av ljus. This standard is intended for the determination of the resistance to cracking of vulcanised rubber in strained condition, when exposed to air at a certain temperature and with a certain ozone content. The conditions exclude the influence of light. Stor f?rsiktighet ska iakttas vid ?verf?ring av resultat fr?n denna provning till praktiska f?rh?llanden. Great caution should be taken in applying the results of this testing to practical conditions. 2 Definition 2 Definition Ozonbest?ndighet ?r f?rm?ga hos gummi att i t?jt tillst?nd motst? sprickbildning vid f?rvarning i ozon-haltig luft. The resistance to ozone cracking is the ability of the rubber to resist cracking when in strained condition and when stored in air containing ozone. Krav p? ozonbest?ndighet enligt denna standard anges som den h?gsta t?jning d?r sprickbildning ej f?r uppst? efter angiven tid vid ozonhalt och ?vriga provningsbetingelser som anges separat. Resistance to ozone cracking in accordance with this standard is specified as the highest permissible strain at which cracking must not occur after the specified time, at the ozone content and other test conditions specified separately. Exempel: ozonbest?ndighet ( 96 h min 20 % Example: Resistance to ozone , ( 96 h min. 20% 3 Provningsmetod 3 Testing method Provkroppar exponeras under statisk t?jning i en provningskammare i en atmosf?r med best?md ozonhalt. Pro