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1、This 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
2、 (TBT) Committee.Designation: D1895 17Standard Test Methods forApparent Density, Bulk Factor, and Pourability of PlasticMaterials1This standard is issued under the xed designation D1895; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revisi
3、on, 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 These test meth
4、ods cover the measurement of 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 ne powdersand granules to large ake
5、s and cut bers.1.2 The values 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 est
6、ablish appro-priate safety, health and environmental practices and deter-mine the applicability of regulatory limitations prior to use.NOTE 1Test Method A is 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
7、 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. Reference
8、d Documents2.1 ASTM Standards:2D792 Test Methods for Density and Specic 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 M
9、olding Mate-rials that Can be Poured from a Specied FunnelR61 Determination of Apparent Density of Molding Mate-rial that Cannot be Poured from a Specied Funnel3. Terminology3.1 Denitions:3.1.1 apparent densitythe weight per unit volume of amaterial, including voids inherent in the material as teste
10、d.3.1.1.1 The term bulk density is commonly 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
11、the density after molding orforming to the apparent density of the material as received.3.1.3 pourabilitya measure of the time required for astandard quantity of material to ow through a funnel ofspecied dimensions.4. Signicance and Use4.1 These test methods provide useful indexes of perfor-mance of
12、 plastic materials such as powders and granules withrespect to their handling in packaging and fabrication.4.2 Apparent density is a measure of the uffiness of amaterial.4.3 Bulk factor is a measure of volume change that may beexpected in fabrication.1These test methods are under the jurisdiction of
13、 ASTM Committee D20 on4.4 Pourability characterizes the handling properties of aPlastics and are the direct responsibility of Subcommittee D20.70 on AnalyticalMethods.Current edition approved Sept. 1, 2017. Published September 2017. Originallyapproved in 1961. Last previous edition approved in 2010
14、as D1895 96(2010)1.DOI: 10.1520/D1895-17.nely divided plastic material. It is a measure of the readinesswith which such materials will ow through hoppers and feedtubes and deliver uniform weights of material.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Custome
15、r Service at serviceastm.org. For Annual Book of ASTMStandards volume information, refer to the standards Document Summary page on3Available from American National Standards Institute (ANSI), 25 W. 43rd St.,the ASTM website.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 States1D1895 17APPARENT DENSITYTest Method A5. Scope5.1 Test
