ASTM_D_3182_-_21a.pdf

Designation:D318221aStandard Practice forRubberMaterials,Equipment,and Procedures for MixingStandard Compounds and Preparing Standard VulcanizedSheets1This standard is issued under the fixed designation D3182;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.This standard has been approved for use by agencies of the U.S.Department of Defense.1.Scope1.1 This practice provides a listing of reference compound-ing materials required to prepare the rubber test compoundslisted in succeeding methods and contains procedures forweighing.It also specifies the mixing equipment,generalmixing procedures,vulcanization equipment and procedures.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.3 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety,health,and environmental practices and deter-mine the applicability of regulatory limitations prior to use.For a specific warning statement,see 5.4.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1646 TestMethodsforRubberViscosity,StressRelaxation,andPre-VulcanizationCharacteristics(Mooney Viscometer)D2084 Test Method for Rubber PropertyVulcanizationUsing Oscillating Disk Cure MeterD5289 Test Method for Rubber PropertyVulcanizationUsing Rotorless Cure MetersD5900 Specification for Physical and Chemical Properties ofIndustry Reference Materials(IRM)D6204 Test Method for RubberMeasurement of Unvulca-nized Rheological Properties Using Rotorless Shear Rhe-ometersE145 Specification for Gravity-Convection and Forced-Ventilation Ovens3.Significance and Use3.1 This practice shall be used for specific procedures usedin preparing rubber compounds for quality control ofproduction,for research and development purposes,and forcomparison of different materials.4.Standard Materials4.1 Standard Reference Materials:4.1.1 The materials required for standard rubber test formu-las shall be Industry Reference Materials(IRM)as specified inSpecification D5900.The current list of Industry ReferenceMaterials for rubber can be found on the webpage of theCommittee D11 under the section Additional Information(www.astm.org/COMMITTEE/D11).4.1.2 In case of dispute in the United States of America,reference materials from the National Institute of Standardsand Technology(NIST)shall be used.4.2 Other standard or industry reference materials are asfollows:Industry Reference Black,Current Lot in use at timeof testing.5.Weighing of Materials5.1 The standard batch mass(in grams)for the laboratorymill shall be three times the formula mass in parts per hundredgrams of rubber,unless otherwise specified.5.2 The batch mass(in grams)for an internal mixer shall bethe nominal capacity multiplied by the density of the rubbercompound and multiplied by the batch factor.1This practice is under the jurisdiction ofASTM Committee D11 on Rubber andRubber-like Materials and is the direct responsibility of Subcommittee D11.20 onCompounding Materials and Procedures.Current edition approved Nov.1,2021.Published November 2021.Originallyapproved in 1973.Last previous edition approved in 2021 as D3182 21.DOI:10.1520/D3182-21A.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.15.2.1 The batch mass(in grams)for a standard internalmixer(SIM)shall be the nominal capacity(1570 6 40 cm3;standard two wing rotors)multiplied by the density of therubber compound and multiplied by the batch factor of 0.65 0.75.The batch factor depends on rubber viscosity.It is on thehigh end for low viscous polymers and on the lower end forhigh viscous polymers.5.2.2 The batch mass(in grams)for a miniature internalmixer(MIM)shall be the nominal capacity multiplied by thedensity of the rubber compound and multiplied by the