Vulkat gummi Materialspecifikationer. Rubber, vulcanized Material specifications
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1 SVENSK STANDARD Fastställd Utgåva 1 Corrected Vulkat gummi Materialspecifikationer Rubber, vulcanized Material specifications ICS Språk: engelska Publicerad: april 2005 Copyright SIS. Reproduction in any form without permission is prohibited.
2 Foreword This standard was prepared by Technical Committee SIS/TK 154, Gummi. This standard supersedes the Swedish Standards: SS , ed. 4, Rubber type 61 Natural and styrene rubber, NR and SBR SS , ed. 5, Rubber type 63 Nitrile rubber, NBR SS , ed. 1, Rubber type 631 Hydrogenated nitrile rubber, HNBR SS , ed. 1, Rubber type 632 Nitrile rubber mixed with PVC, NBR/PVC SS , ed. 4, Rubber type 64 Chloropene rubber, CR SS , ed. 1, Rubber type 65 Ethylene-acrylate rubber, AEM SS , ed. 3, Rubber type 67 Fluorocarbon rubber,fpm SS , ed. 3, Rubber type 68 Silicone rubber, Q SS , ed. 1, Rubber type 69 Epichlorohydrin rubber, ECO SS , ed. 3, Rubber type 70 Ethylene-propylene copolymer rubber and ethylene-propylene terpolymer rubber, EPM and EPDM This standard has technically been updated compared with the standards that are replaced. The changed approach has been based on the technical development of rubber materials and customer demand. This version has been corrected by deletion of EPDM type 3 in table 1. Also in table 1 EPDM type 2 shall be peroxide vulcanized. Tables 34 and 35 has also been deleted, they had the same content as table 32 and 33 respectively. Upplysningar om sakinnehållet i standarden lämnas av SIS, Swedish Standards Institute, telefon Standarder kan beställas hos SIS Förlag AB som även lämnar allmänna upplysningar om svensk och utländsk standard. Postadress: SIS Förlag AB, STOCKHOLM Telefon: Telefax: E-post: sis.sales@sis.se. Internet:
3 Sida 1 Rubber, vulcanized Material specifications 1 Scope This standard gives requirements for the specification of vulcanised rubber based on the properties of individual rubber types. The standard contains specification tables for the physical properties characterising the rubber as well as a designation system. Since the physical properties of rubber depend on the type of rubber, all rubbers are classified in up to four types and organised by hardness. The standard includes: Natural rubber (NR) Styrene butadiene rubber (SBR) Nitrile rubber (NBR) Hydrogenated nitrile rubber (HNBR) Nitrile rubber mixed with PVC (NBR/PVC) Chloroprene rubber (CR) Acrylic rubber (ACM) Ethylene acrylic rubber (AEM) Fluorocarbon rubber (FKM) Silicone rubber (VMQ) Epichlorohydrin rubber (ECO) Ethylene propylene rubber (EPM and EPDM). It is the main polymer in the rubber material that gives the name of the rubber type. The rubber material can also be mixed with other polymers. The specifications in this standard give good basic materials for general use. For specific product applications materials with modified requirements may be needed. It might also be necessary to specify additional requirements e.g. for the cold-resistant properties. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references only the edition cited apply. For undated references, the latest edition of the referenced document (including any amendments) applies. SS-ISO 34-1, Rubber, vulcanized or thermoplastic Determination of tear strength Part 1: Trouser, angle and crescent test pieces SS-ISO 37, Rubber, vulcanized or thermoplastic Determination of tensile stress-strain properties SS-ISO 48, Rubber, vulcanized or thermoplastic Determination of hardness (hardness between 10 IRHD and 100 IRHD) SS-ISO 188, Rubber, vulcanized or thermoplastic Accelerated ageing and heat resistance tests SS-ISO 815, Rubber, vulcanized or thermoplastic Determination of compression set at ambient, elevated or low temperatures SS-ISO , Rubber, vulcanized or thermoplastic Resistance to ozone cracking Part 1: Static and dynamic strain testing
4 Sida 2 SS-ISO 1629, Rubber and latices Nomenclature SS-ISO 1817, Rubber, vulcanized Determination of the effect of liquids SS-ISO 2285, Rubber, vulcanized or thermoplastic Determination of tension set under constant elongation, and of tension set, elongation and creep under constant tensile load SS-ISO 2921, Rubber, vulcanized Determination of low-temperature characteristics Temperature-retraction procedure (TR test) SS-ISO , Rubber, vulcanized or thermoplastic Determination of indentation hardness Part 1: Durometer method (Shore hardness) ISO/TR 7620, Rubber materials Chemical resistance 3 Material designation For each rubber polymer in this standard there is one or several alternative materials specified. When using this standard, start by selecting a rubber polymer in accordance with SS-ISO/TR 7620, and then select the hardness. In several cases there are also supplementary requirements. How to designate the selected material is described in 4. 4 Designation system The vulcanized rubber material number shall be designated by the number of this standard SS " followed by rubber type, hardness, type number, and designation(s) for supplementary requirements. Supplementary requirements: C = Cold-resistant F = Fuel resistance L = Long-term properties O = Oil resistance Oz = T = Tear resistance For example. SS NR 70-1-C-L All materials have certain mandatory property requirements to fulfil. For certain materials the requirements can be more stringent due to supplementary requirements. Table 1 lists the supplementary requirements possible for the different materials.
5 Sida 3 Table 1 Supplementary properties for different materials Material Natural Rubber (NR) type 1 (materials with high tensile properties and good compression set properties) Natural Rubber (NR) type 2 (materials with moderate tensile properties and moderate compression set properties) Styrene Butadien Rubber (SBR) type 1 (materials with high tensile properties and good compression set properties) Styrene Butadien Rubber (SBR) type 2 (materials with moderate tensile properties and moderate compression set properties) Supplementary designation C F L O Oz T X X X X X X X X X X X X Nitrile Rubber (NBR) type 1 (acrylnitrile content approx. 33%) X X Nitrile Rubber (NBR) type 2 (acrylnitrile content approx. 28%) X Nitrile Rubber (NBR) type 3 X X Nitrile Rubber (NBR) type 4 X Hydrogenated Nitrile Rubber (HNBR) type 1 (materials with a high degree of hydrogenation) Hydrogenated Nitrile Rubber (HNBR) type 2 (materials with a moderate degree of hydrogenation) Nitrile/PVC Rubber (NBR/PVC) type 1 Chloroprene Rubber (CR) type 1 X Acrylic Rubber (ACM) type 1 Ethylene Acrylic Rubber (AEM) type 1, moderate swell type Ethylene Acrylic Rubber (AEM) type 2, low swell type Fluorocarbon Rubber (FKM) type 1, copolymer Fluorocarbon Rubber (FKM) type 2, terpolymer Silicone Rubber (VMQ) type 1 X X Epichlorhydrin Rubber (ECO) type 1 Ethylene Propylene Rubber (EPM and EPDM) type 1, sulphur vulcanised Ethylene Propylene Rubber (EPM and EPDM) type 2, peroxide vulcanised X X
6 Sida 4 Table 2 Examples of material designation Material Material designation Hardness Supplementary designation Natural Rubber (NR) type 1, with high tensile properties and good compression set properties SS NR 40-1-C-L SS NR 50-1-C-L SS NR 60-1-C-L SS NR 70-1-C-L SS NR 80-1-C-L Cold-resistant + Long-term properties Natural Rubber (NR) type 2, with moderate tensile properties and moderate compression set properties SS NR 40-2-C-L-Oz SS NR 50-2-C-L-Oz SS NR 60-2-C-L-Oz SS NR 70-2-C-L-Oz SS NR 80-2-C-L-Oz Cold-resistant + Long-term properties + Styrene Butadiene Rubber (SBR) type 1, with high tensile properties and good compression set properties SS SBR 40-1-C-L SS SBR 50-1-C-L SS SBR 60-1-C-L SS SBR 70-1-C-L SS SBR 80-1-C-L Cold-resistant + Longterm properties Styrene Butadiene Rubber (SBR) type 2, with moderate tensile properties and moderate compression set properties SS SBR 40-2-C-L-Oz SS SBR 50-2-C-L-Oz SS SBR 60-2-C-L-Oz SS SBR 70-2-C-L-Oz SS SBR 80-2-C-L-Oz Cold-resistant + Long-term properties + Nitrile Rubber (NBR) type 1, acrylnitrile content approx. 33 % SS NBR 40-1-F-Oz SS NBR 50-1-F-Oz SS NBR 60-1-F-Oz SS NBR 70-1-F-Oz SS NBR 80-1-F-Oz Fuel resistance + Nitrile Rubber (NBR) type 2, acrylnitrile content approx. 28 % SS NBR 40-2-Oz SS NBR 50-2-Oz SS NBR 60-2-Oz SS NBR 70-2-Oz SS NBR 80-2-Oz Hydrogenated Nitrile Rubber (HNBR) type 1, with a high degree of hydrogenation SS HNBR 50-1 SS HNBR 60-1 SS HNBR 70-1 SS HNBR 80-1 Hydrogenated Nitrile Rubber (HNBR) type 2, with a moderate degree of hydrogenation SS HNBR 50-2 SS HNBR 60-2 SS HNBR 70-2 SS HNBR 80-2 Nitrile/PVC Rubber (NBR/PVC) type 1 SS NBR/PVC 50-1 SS NBR/PVC 60-1 SS NBR/PVC 70-1 Chloroprene Rubber (CR) type 1 SS CR 40-1-C SS CR 50-1-C SS CR 60-1-C SS CR 70-1-C SS CR 80-1-C
7 Sida 5 Material Material designation Hardness Supplementary designation Acrylic Rubber (ACM) type 1 SS ACM 70-1 SS ACM 80-1 Ethylene Acrylic Rubber (AEM) type 1, moderate swell type SS AEM 40-1 SS AEM 50-1 SS AEM 60-1 SS AEM Shore A 50 Shore A 60 Shore A 70 Shore A Ethylene Acrylic Rubber (AEM) type 2, low swell type SS AEM 40-2 SS AEM 50-2 SS AEM 60-2 SS AEM Shore A 50 Shore A 60 Shore A 70 Shore A Ethylene Acrylic Rubber (AEM) type 3, designed for extruded products which are continously vulcanized without overpressure SS AEM 65-3 SS AEM 75-3 SS AEM Shore A 75 Shore A 85 Shore A Fluorocarbon Rubber (FKM) type 1, copolymer SS FKM 60-1 SS FKM 70-1 SS FKM 80-1 Fluorocarbon Rubber (FKM) type 2, terpolymer SS FKM 70-2 SS FKM 80-2 Silicone Rubber (VMQ) type 1 SS VMQ 20-1-O-T SS VMQ 30-1-O-T SS VMQ 40-1-O-T SS VMQ 50-1-O-T SS VMQ 60-1-O-T SS VMQ 70-1-O-T SS VMQ 80-1-O-T SS VMQ 70-1-O-T SS VMQ 80-1-O-T 20 IRH 30 IRH Oil resistance + Tear resistance Epichlorohydrin Rubber (ECO) type 1 SS ECO 50-1 SS ECO 60-1 SS ECO 70-1 EPDM type 1, sulphur vulcanized SS EPDM 30-1-C SS EPDM 40-1-C SS EPDM 50-1-C SS EPDM 60-1-C SS EPDM 70-1-C SS EPDM 80-1-C 30 IRH Cold resistance EPDM and EPM type 2, peroxide vulcanized SS EPDM 60-2-C SS EPDM 70-2-C SS EPDM 80-2-C Cold resistance 5 Rubber specifications 5.1 Natural rubber, NR Natural rubber has good tensile strength and good wear properties, even without reinforcing fillers. This makes it possible to manufacture soft rubber products with good mechanical properties. For manufacturing
8 Sida 6 of complex products the good processability is an advantage. The low temperature properties are good and the mechanical damping is very low. The oil and ozone resistance is poor. Specifications are given in Tables 3 to 8. Table 3 Basic properties NR type 1 (natural rubber with high tensile properties and good compression set properties) Hardness IRHD ± SS-ISO 48 Tensile strength MPa Min SS-ISO 37 Elongation at break % Min SS-ISO 37 Tension set 70 C/24h and 50% strain % Max SS-ISO 2285 Tear resistance N/mm Min SS-ISO 34-1; method C Compression set 70 C/24h % Max SS-ISO 815 1) Change in hardness 70 C/72h IRHD Max ± 5 ± 5 ± 5 ± 5 ± 5 SS-ISO 48 1) Change in tensile strength Change in elongation at break 50 pphm/40 C/96h % Max SS-ISO 37 1) % Max SS-ISO 37 1) % Min SS-ISO ; Procedure C Table 4 Supplementary properties NR type 1 Longterm ( L ) Coldresistant ( C ) Compression set Change in hardness Change in tensile strength Change in elongation at break % Max SS-ISO 815 1) IRHD Max SS-ISO 48 1) % Max SS-ISO 37 1) % Max SS-ISO 37 1) Temp. retraction C Max SS-ISO 2921 TR 10 Temp. retraction C Max SS-ISO 2921 TR 30
9 Sida 7 Table 5 Basic properties NR type 2 (natural rubber with moderate tensile properties and moderate compression set properties) Hardness IRHD ± SS-ISO 48 Tensile strength MPa Min SS-ISO 37 Elongation at break % Min SS-ISO 37 Tension set 70 C/24h and 50% strain % Max SS-ISO 2285 Tear resistance N/mm Min SS-ISO 34-1; Method C Compression set 70 C/24h % Max SS-ISO 815 1) Change in hardness 70 C/72h IRHD Max Change in tensile strength Change in elongation at break SS-ISO 48 1) % Max SS-ISO 37 1) % Max SS-ISO 37 1) Longterm ( L ) Coldresistant ( C ) Compression set Change in hardness Change in tensile strength Change in elongation at break 50 pphm/40 C/96h Table 6 Supplementary properties NR type % Max SS-ISO 815 1) IRHD Max SS-ISO 48 1) % Max SS-ISO 37 1) % Max SS-ISO 37 1) Temp. retraction C Max SS-ISO 2921 TR 10 Temp. retraction C Max SS-ISO 2921 TR 30 % Min SS-ISO Procedure C
10 Sida 8 Table 7 Basic properties NR type Hardness IRHD 40 ± 5 50 ± 5 60 ± 5 70 ± 5 80 ± 5 SS-ISO 48 Tensile strength MPa Min SS-ISO 37 Elongation at break % Min SS-ISO 37 Compression set 70 C/24h % Max SS-ISO 815 1) ; Change in hardness 70 C/72h IRHD Max SS-ISO 48 1) Change in tensile strength Change in elongation at break 50 pphm/40 C/96h % Max SS-ISO 37 1) % Max SS-ISO 37 1) % Min SS-ISO Procedure C Table 8 Basic properties NR type Hardness IRHD 40 ± 5 50 ± 5 60 ± 5 70 ± 5 80 ± 5 SS-ISO 48 Tensile strength MPa Min SS-ISO 37 Elongation at break % Min SS-ISO 37 Compression set 70 C/24h % Max SS-ISO 815 1) ; Change in hardness 70 C/72h IRHD Max SS-ISO 48 1) Change in tensile strength Change in elongation at break 50 pphm/40 C/96h % Max SS-ISO 37 1) % Max SS-ISO 37 1) % Min SS-ISO Procedure C
11 Sida Styrene-Butadiene Rubber, SBR Styrene-butadiene rubber requires reinforcing fillers to achieve good mechanical properties. Compared with natural rubber the styrene-butadiene rubber has higher mechanical damping and not so good low temperature properties. The wear properties are often better than natural rubber when used in tyres at high temperature and high speed. The oil and ozone resistances are poor. Specifications are given in Tables 9 to 12. Table 9 Basic properties SBR type 1 (styrene-butadiene rubber with high tensile properties and good compression set properties) Hardness and Type number Hardness IRHD ± SS-ISO 48 Tensile strength MPa Min SS-ISO 37 Elongation at break % Min SS-ISO 37 Tension set 70 C/24h and 50% strain % Max SS-ISO 2285 Tear resistance N/mm Min SS-ISO 34-1 method C Compression set 70 C/24h % Max SS-ISO 815 1) Change in hardness 70 C/72h IRHD Max SS-ISO 48 1) Change in tensile strength Change in elongation at break % Max SS-ISO 37 1) % Max SS-ISO 37 1) 50 pphm/40 C/96h % Min SS-ISO Procedure C Longterm ( L ) Compression set Change in hardness 70 C/42 days Change in tensile strength Change in elongation at break Table 10 Supplementary properties SBR type % Max SS-ISO 815 1) IRHD Max SS-ISO 48 1) % Max SS-ISO 37 1) % Max SS-ISO 37 1) Coldresistant Temp. retraction TR 10 C Max SS-ISO 2921 ( C ) Temp. retraction C Max SS-ISO 2921 TR 30
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