ASTM_D_1056_-_20.pdf

Designation:D105620Standard Specification forFlexible Cellular MaterialsSponge or Expanded Rubber1,2This standard is issued under the fixed designation D1056;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.Scope*1.1 This specification covers flexible cellular rubber prod-ucts known as sponge rubber and expanded rubber,but doesnot apply to latex foam rubber or ebonite cellular rubber.Thebase material for an open/closed cellular product may be madeof synthetic,natural,or reclaimed rubber,or a mixture,andmay contain other polymers or chemicals,or both,which maybe modified by organic or inorganic additives.These elasto-meric materials have properties similar to those of vulcanizedrubber,namely(1)the ability to be converted from a thermo-plastic to a thermosetting state by crosslinking(vulcanization)or(2)the substantial recovery of their original shapes whenstrained or elongated,or both.1.2 Extruded or molded shapes of sizes too small for cuttingstandard test specimens are difficult to classify or test by thesemethods and will usually require special testing procedures.1.3 In case of conflict between the provisions of this generalspecification and those of detailed specifications or test meth-ods for a particular product,the latter shall take precedence.Reference to the test methods in this specification shouldspecifically state the particular test or tests desired.1.4 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are mathematicalconversions to SI units that are provided for information onlyand are not considered standard.1.5 The following safety hazards caveat pertains only to thetest methods portions of this specification:This standard doesnot purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of thisstandard to establish appropriate safety,health,and environ-mental practices and determine the applicability of regulatorylimitations prior to use.NOTE1ISO 6916-1 is similar to this specification.1.6 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:3D395 Test Methods for Rubber PropertyCompression SetD412 Test Methods for Vulcanized Rubber and Thermoplas-tic ElastomersTensionD471 Test Method for Rubber PropertyEffect of LiquidsD573 Test Method for RubberDeterioration in an AirOvenD575 Test Methods for Rubber Properties in CompressionD624 Test Method for Tear Strength of Conventional Vul-canized Rubber and Thermoplastic ElastomersD832 Practice for Rubber Conditioning For Low Tempera-ture TestingD883 Terminology Relating to PlasticsD1171 Test Method for Rubber DeteriorationSurfaceOzone Cracking Outdoors(Triangular Specimens)D2632 Test Method for Rubber PropertyResilience byVertical ReboundD3182 Practice for RubberMaterials,Equipment,and Pro-cedures for Mixing Standard Compounds and PreparingStandard Vulcanized SheetsD3183 Practice for RubberPreparation of Pieces for TestPurposes from ProductsD5132 Test Method for Horizontal Burning Rate of Poly-meric Materials Used in Occupant Compartments ofMotor Vehicles1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.22 on CellularMaterials-Plastics and Elastomers.This standard has been approved for use by agencies of the Department ofDefense to replace Methods 12001,12005,12011,12021,12031,12041,12151,and 12411 of Federal Test Method Standard No.601.This standard has been approved for use by agencies of the Department ofDefense to replace MIL-STD-670 and MIL-STD-C 3133,which were discontinuedin 1986.Current edition approved Oct.1,2020.Published November 2020.Originallyapproved in 1949.Last previous edition approved in 2014 as D1056-14.DOI:10.1520/D1056-20.2This version supersedes all prior versions of this specification.3For 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.*A Summary of Changes section appears at the end of this standardCopyright 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 D