標(biāo)準(zhǔn)編號:	GB/T 7762-2014
中文名稱:	硫化橡膠或熱塑性橡膠 耐臭氧龜裂 靜態(tài)拉伸試驗(yàn)
英文名稱:	Rubber,vulcanized or thermoplastic—Resistance to ozone cracking—Static strain testing
中標(biāo)分類:	G40    橡膠制品綜合
行業(yè)分類:	GB    國家標(biāo)準(zhǔn)
ICS分類:	83.060 83.060    橡膠 83.060
發(fā)布機(jī)構(gòu):	中華人民共和國國家質(zhì)量監(jiān)督檢驗(yàn)檢疫總局 中國國家標(biāo)準(zhǔn)化管理委員會
發(fā)布日期:	2014-12-22
實(shí)施日期:	2015-6-1
標(biāo)準(zhǔn)狀態(tài):	valid
替代舊標(biāo)準(zhǔn):	GB/T 7762-2003 硫化橡膠或熱塑性橡膠 耐臭氧龜裂靜態(tài)拉伸試驗(yàn)
翻譯語言:	英文
文件格式:	PDF
中文字符數(shù):	10000 字
翻譯價(jià)格(元):	240.0
交付時(shí)間:	付款后 1 個(gè)工作日

1 Scope This standard specifies procedures intended for use in estimating the resistance of vulcanized or thermoplastic rubbers to cracking when exposed, under static tensile strain, to air containing a definite concentration of ozone and at a definite temperature in circumstances that exclude the effects of direct light. This standard is applicable to vulcanized or thermoplastic rubbers. Note: Great caution is necessary in attempting to relate standard test results to service performance since the relative ozone resistance of different rubbers can vary markedly depending on the conditions, especially ozone concentration and temperature. In addition, tests are carried out on thin test pieces deformed in tension and the significance of attack for articles in service can be quite different owing to the effects of size and of the type and magnitude of the deformation. Explanatory notes on the nature of ozone cracking are given in Appendix A. 2 Normative References The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document(including any amendments) applies. GB/T 528-2009 Rubber, Vulcanized or Thermoplastic — Determination of Tensile Stress-strain Properties (ISO 37:2005, IDT) GB/T 2941-2006 Rubber — General Procedures for Preparing and Conditioning Test Pieces for Physical Test Methods (ISO 23529:2004, IDT) GB/T 11206-2009 ISO 1431-3 Rubber, Vulcanized or Thermoplastic — Resistance to Ozone Cracking — Part 3: Reference and Alternative Methods for Determining the Ozone Concentration in Laboratory Test Chambers 3 Terms and Definitions For the purpose of this document, the following terms and definitions apply. 3.1 Threshold strain Highest tensile strain at which a rubber can be exposed at a given temperature to air containing a given concentration of ozone without ozone cracks developing on it after a given exposure period. 3.2 Limiting threshold strain Tensile strain below which the time required for the development of ozone cracks increases very markedly and can become virtually infinite.