1、Designation:D189517Standard Test Methods forApparent Density,Bulk Factor,and Pourability of PlasticMaterials1This standard is issued under the fixed designation D1895;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last r
2、evision.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 These test methods cover the measurement of
3、 apparentdensity,bulk factor,and where applicable,the pourability ofplastic materials such as molding powders.Different proce-dures are given for application to the various forms of thesematerials that are commonly encountered,from fine powdersand granules to large flakes and cut fibers.1.2 The valu
4、es stated in SI units are to be regarded as thestandard.The values in parentheses are for information only.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,heal
5、th and environmental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE1Test MethodAis equivalent to ISO Method R 60 as describedin the appendix.Test Method C is identical with ISO Method R 61.1.4 This international standard was developed in accor-dance with inter
6、nationally 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:2D792 Test
7、 Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD883 Terminology Relating to PlasticsD1505 Test Method for Density of Plastics by the Density-Gradient Technique2.2 ISO Standards:3R60 Determination of Apparent Density of Molding Mate-rials that Can be Poured fro
8、m a Specified FunnelR61 Determination of Apparent Density of Molding Mate-rial that Cannot be Poured from a Specified Funnel3.Terminology3.1 Definitions:3.1.1 apparent densitythe weight per unit volume of amaterial,including voids inherent in the material as tested.3.1.1.1 The term bulk density is c
9、ommonly used for mate-rials such as molding powder.3.1.2 bulk factorthe ratio of the volume of any givenquantity of the loose plastic material to the volume of the samequantity of the material after molding or forming.The bulkfactor is also equal to the ratio of the density after molding orforming t
10、o the apparent density of the material as received.3.1.3 pourabilitya measure of the time required for astandard quantity of material to flow through a funnel ofspecified dimensions.4.Significance and Use4.1 These test methods provide useful indexes of perfor-mance of plastic materials such as powde
11、rs and granules withrespect to their handling in packaging and fabrication.4.2 Apparent density is a measure of the fluffiness of amaterial.4.3 Bulk factor is a measure of volume change that may beexpected in fabrication.4.4 Pourability characterizes the handling properties of afinely divided plasti
12、c material.It is a measure of the readinesswith which such materials will flow through hoppers and feedtubes and deliver uniform weights of material.1These test methods are under the jurisdiction of ASTM Committee D20 onPlastics and are the direct responsibility of Subcommittee D20.70 on AnalyticalM
13、ethods.Current edition approved Sept.1,2017.Published September 2017.Originallyapproved in 1961.Last previous edition approved in 2010 as D1895 96(2010)1.DOI:10.1520/D1895-17.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Ann
14、ual 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 standardCopyr
15、ight 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 S
16、tandards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 APPARENT DENSITYTest Method A5.Scope5.1 Test Method A(see Note 1)covers the measurement ofthe apparent density of the fine granules and powders that canbe poured readily through a small funnel.6.Apparatus6.1 Measuring CupA cylindrical cup of 100 6 0.5-cm3capacity,having a diameter equal to half the height,as shownin Fig.1.NOTE2Example,39.9-mm(1.572-in.)inside diameter by 79.8-mm
