ASTM_D_1622_-_20.pdf

Designation:D162220Standard Test Method forApparent Density of Rigid Cellular Plastics1This standard is issued under the fixed designation D1622;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 test method covers the density of a cellular plastic.Density can be evaluated as the apparent overall density(includes forming skins)or by apparent core density(formingskins removed).1.2 The values stated in SI units are to be regarded asstandard.The values given in parentheses are mathematicalconversions to inch-pound units that are provided for informa-tion only and are not considered standard.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.NOTE1This test method is equivalent to ISO 845.1.4 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:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to PlasticsE456 Terminology Relating to Quality and StatisticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test MethodE2935 Practice for Conducting Equivalence Testing inLaboratory Applications2.2 ISO Standard:ISO 845 Cellular plastics and rubbersDetermination ofapparent density33.Terminology3.1 Terms used in this standard are defined in accordancewith Terminology D883,unless otherwise specified.For termsrelating to precision and bias and associated issues,the termsused in this standard are defined in accordance with Terminol-ogy E456.3.2 Definitions of Terms Specific to This Standard:3.2.1 apparent core density(of a cellular plastic),ntheweight in air per unit volume of a sample,after all formingskins formed during the manufacturing process have beenremoved.3.2.2 apparent overall density(of a cellular plastic),ntheweight in air per unit volume of a sample,including all formingskins formed during the manufacturing process.4.Significance and Use4.1 If the material to be tested includes forming skins,theapparent overall density,or the apparent core density,or both,shall be determined.If the material does not have formingskins,the term overall density is not applicable.4.2 This test method is also applicable to spray foammaterials.4.3 Before proceeding with this test method,reference shallbe made to the specification of the material being tested.Anytest specimen preparation,conditioning,dimensions,or testingparameters,or combination thereof,covered in the relevantASTM materials specification shall take precedence over thosementioned in this test method.If there are no relevant ASTMmaterial specifications,then the default conditions in thismethod apply.4.4 When density or apparent density is used in reference toa cellular plastic,without further qualification,it shall beinterpreted as follows:1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand is the direct responsibility of Subcommittee D20.22 on Cellular Materials-Plastics and Elastomers.Current edition approved July 15,2020.Published July 2020.Originallyapproved in 1959.Last previous edition approved in 2014 as D1622/D1622M-14.DOI:10.1520/D1622-20.2For 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.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*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 Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.4.4.1 densityshall be interpreted as being the apparentoverall density if the material is to be used with forming skinsintact.4.4.2 densityshall be interpreted as the apparent coredensity if the forming skins have been,or will be,remo