GB/T 15257-2008 English PDFUS$189.00 · In stock
Delivery: <= 3 days. True-PDF full-copy in English will be manually translated and delivered via email. GB/T 15257-2008: Mixed modulation chloroprene rubber CR321, CR322 Status: Valid GB/T 15257: Historical versions
Basic dataStandard ID: GB/T 15257-2008 (GB/T15257-2008)Description (Translated English): Mixed modulation chloroprene rubber CR321, CR322 Sector / Industry: National Standard (Recommended) Classification of Chinese Standard: G35 Classification of International Standard: 83.060 Word Count Estimation: 8,865 Date of Issue: 2008-06-19 Date of Implementation: 2009-02-01 Older Standard (superseded by this standard): GB/T 15257-1994 Quoted Standard: GB/T 528-1998; GB/T 1232.1-2000; GB/T 1233-2008; GB/T 4498-1997; GB/T 15340-1994; GB/T 19187-2003; GB/T 21462-2008; HG/T 3928-2007 Regulation (derived from): National Standard Approval Announcement 2008 No.10 (Total No.123) Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China Summary: This standard specifies the type chloroprene rubber mix adjustment CR321 Series CR3211, CR3212, CR3213 and CR322 Series CR3221, CR3222, CR3223 technical requirements, test methods, inspection rules, and packaging, signs, storage, transport. GB/T 15257-2008: Mixed modulation chloroprene rubber CR321, CR322---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.Mixed modulation chloroprene rubber CR321, CR322 ICS 83.060 G35 National Standards of People's Republic of China Replacing GB/T 15257-1994 Mixed regulated chloroprene rubber CR321, CR322 Posted 2008-06-19 2009-02-01 implementation Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China Standardization Administration of China released ForewordThis standard replaces GB/T 15257-1994 "mixed adjustment neoprene CR321, CR322". This standard and GB/T 15257-1994 main differences. --- Modify the contents of the range; --- Normative documents made no reference to date reference date; --- GB/T 4498-1997 instead of GB 6736; --- GB/T 15340-1997 instead of GB 6735; --- GB/T 19187-2003 instead of GB 6734; --- GB/T 21462-2008 instead of Appendix A; --- HG/T 3928-2007 instead of HG9004; --- Remove the GB/T 2941, GB/T 5577, GB/T 6038; --- Deleted CR321, CR322 grade requirements and division; --- Revised technical requirements; --- The standard type inspection items to ash; --- Removed in Appendices A and B; --- Appendix A to replace Annex C. Appendix A of this standard is a normative appendix. The standard proposed by China Petroleum and Chemical Corporation. This standard by the National Standardization Technical Committee rubber and rubber products, synthetic rubber Technical Committee (SAC/TC35/SC6) Centralized. This standard drafting of the main unit. Shanxi Synthetic Rubber Group Co., Ltd., China National Petroleum Corporation, Lanzhou Institute of Chemical Research Centre, Chongqing Changshou Chemical Co., Ltd. The main drafters of this standard. places Shibin, Diyue Qin, Zhang Fang, TECHNIQUE OF Xingshi Xia, Tangyan Wen Tu Chi Ming, Cheung left East. This standard replaces the previous standard published case. --- GB/T 15257-1994. Mixed regulated chloroprene rubber CR321, CR3221 ScopeThis standard specifies a hybrid regulated chloroprene rubber CR321 Series CR3211, CR3212, CR3213 and CR322 series The CR3221, CR3222, CR3223 technical requirements, test methods, inspection rules, and packaging, labeling, storage, transport. This standard applies to chloroprene monomer, sulfur, and D as a modifier modifier by emulsion polymerization prepared CR3211, CR3212, CR3213, CR3221, CR3222, CR3223.2 Normative referencesThe following documents contain provisions which, through reference in this standard and become the standard terms. For dated references, subsequent Amendments (not including errata content) or revisions do not apply to this standard, however, encourage the parties to the agreement are based on research Study whether the latest versions of these documents. For undated reference documents, the latest versions apply to this standard. GB/T 528-1998 vulcanized rubber or thermoplastic rubber tensile stress strain properties (eqv ISO 37.1994) GB/T 1232.1-2000 Determination of the first part of the uncured rubber by shearing disc viscometer. Mooney viscosity measurement (Neq ISO 289-1.1994) GB/T 1233-2008 unmeasured characteristics of vulcanized rubber vulcanization initial shearing disc viscometer was measured (ISO 289-2. 1994, MOD) GB/T 4498-1997 Rubber - Determination of ash (eqv ISO 247.1990) GB/T 15340-1994 natural and synthetic rubber raw sampling and sample preparation method (idt ISO 1795.1992) GB/T 19187-2003 Rubber, raw synthetic sampling program GB/T 21462-2008 chloroprene rubber (CR) Evaluation Method HG/T 3928-2007 industrial activity light magnesium oxide3 Technical requirements3.1 Appearance Mechanical impurities beige or light brown flakes, lumps, talc-free outside without burning particles (visually). 3.2 Technical Specifications CR3211, CR3212, CR3213, CR3221, CR3222, CR3223 technical indicators in Table 1. Table 1 CR3211, CR3212, CR3213, CR3221, CR3222, CR3223 Specifications project index Premium grade First grade Qualified Mooney viscosity ML (1 + 4) 100 ℃ CR3211, CR3221 25 ~ 40 CR3212, CR3222 41 ~ 60 CR3213, CR3223 61 ~ 80 500% modulus/MPa ≥ 2.0 ~ 5.0 Tensile strength/MPa ≥ 25.0 22.0 20.0 ...... |
