1、Designation:D1622/D1622M14Standard Test Method forApparent Density of Rigid Cellular Plastics1This standard is issued under the fixed designation D1622/D1622M;the number immediately following the designation indicates theyear of original adoption or,in the case of revision,the year of last revision.
2、A number in parentheses indicates the year of lastreapproval.A superscript 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 p
3、lastic.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 either SI units or inch-pound unitsare to be regarded separately as standard.The values stated ineach system may not be exact equivalents;
4、therefore,eachsystem shall be used independently of the other.Combiningvalues from the two systems may result in non-conformancewith the 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 standar
5、d to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1This test method is equivalent to ISO 845.2.Referenced Documents2.1 ASTM Standards:2D618 Practice for Conditioning Plastics for TestingD883 Terminology Relating to Pla
6、sticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ISO Standard:ISO 845 Cellular Plastics and RubbersDetermination ofApparent(Bulk)Density33.Terminology3.1 For definitions of terms associated with plasticmaterials,see Terminology D883.3.2 Definit
7、ions of Terms Specific to This Standard:3.2.1 apparent core density(of a cellular plastic)theweight in air per unit volume of a sample,after all formingskins have been removed.3.2.2 apparent overall density(of a cellular plastic)theweight in air per unit volume of a sample,including all formingskins
8、.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 f
9、oammaterials.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
10、 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:4.4.1 densitysh
11、all 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,removedbefore the material is used.5.Apparatus5.1 Analytical Balance or Scale,capable
12、 of weighing thespecimens to the nearest 60.1%.5.2 Micrometer Dial Gauge,Caliper,or Steel Rule,suitablefor measuring dimensions of the specimen to 60.1%.5.3 Dual Component Spray Equipment,designed to meterthe materials.1This test method is under the jurisdiction of ASTM Committee D20 on Plasticsand
13、is the direct responsibility of Subcommittee D20.22 on Cellular Materials-Plastics and Elastomers.Current edition approved April 1,2014.Published May 2014.Originallyapproved in 1959.Last previous edition approved in 2008 as D1622-08.DOI:10.1520/D1622-14.2For referenced ASTM standards,visit the ASTM
14、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.
15、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 States1 6.Test Specimen6.1 The specimen shall be of a shape whose volume can bereadily calculated,and not less than 16.4 cm3
16、1.0 in.3 involume.6.2 If the sample is a single object whose weight andvolume can be measured accurately,using the total weight andtotal volume to determine the sample density is acceptable.Inthis case,the test specimen is the entire sample.6.3 When testing spray foam materials,specimens shall beprepared as follows:6.3.1 Test specimens shall be taken from finished foamsamples that have been sprayed from compounds in accordancewith 6.3.2.6.3.2 Spray the sample compounds at room temperature(betwee
