1、Designation:D557794(Reapproved 2010)1Standard Guide forTechniques to Separate and Identify Contaminants inRecycled Plastics1This standard is issued under the fixed designation D5577;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the
2、 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.1NOTEReapproved with editorial change to Note 1 in January 2010.1.Scope1.1 This guide is intended to provide information on a
3、vail-able methods for the separation and classification of contami-nants such as moisture,incompatible polymers,metals,adhesives,glass,paper,wood,chemicals,and original-productresidues in recycled plastic flakes or pellets.Although nospecific methods for identification or characterization of foampro
4、ducts are included,foam products are not excluded fromthis guide.The methods presented apply to post-consumerplastics.1.2 For specific procedures existing as ASTM test methods,this guide only lists the appropriate reference.Where nocurrent ASTM standard exists,however,this guide givesprocedures for
5、the separation or identification,or both,ofspecific contaminants.Appendix X1 lists the tests and thespecific contaminant addressed by each procedure.1.3 This guide does not include procedures to quantify thecontaminants unless this information is available in referencedASTM standards.1.4 This standa
6、rd 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 and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE1There is no known ISO equiva
7、lent to this standard.2.Referenced Documents2.1 ASTM Standards:2D789 Test Methods for Determination of Solution Viscosi-ties of Polyamide(PA)D792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD883 Terminology Relating to PlasticsD1003 Test Method for Haze
8、 and Luminous Transmittanceof Transparent PlasticsD1193 Specification for Reagent WaterD1238 Test Method for Melt Flow Rates of Thermoplasticsby Extrusion PlastometerD1457 Specification for Polytetrafluoroethylene(Ptfe)Molding and Extrusion Materials(Withdrawn 1996)3D1505 Test Method for Density of
9、Plastics by the Density-Gradient TechniqueD1898 Practice for Sampling of Plastics(Withdrawn 1998)3D1925 Test Method for Yellowness Index of Plastics(With-drawn 1995)3D3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystallization of Polymers byDifferential Scanning Calori
10、metryD4019 Test Method for Moisture in Plastics by CoulometricRegeneration of Phosphorus Pentoxide(Withdrawn2002)3D5033 Guide for Development ofASTM Standards Relatingto Recycling and Use of Recycled Plastics(Withdrawn2007)3D5227 Test Method for Measurement of Hexane ExtractableContent of Polyolefin
11、sE169 Practices for General Techniques of Ultraviolet-VisibleQuantitative AnalysisE355 Practice for Gas Chromatography Terms and Relation-shipsE682 Practice for Liquid Chromatography Terms and Rela-tionshipsE794 Test Method for MeltingAnd Crystallization Tempera-tures By Thermal AnalysisE1252 Practi
12、ce for General Techniques for Obtaining Infra-red Spectra for Qualitative Analysis1This guide is under the jurisdiction of ASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.95 on Recycled Plastics.Current edition approved Jan.1,2010.Published February 2010.Originally
13、approved in 1994.Last previous edition approved in 2003 as D5577-94(2003).DOI:10.1520/D5577-94R10E01.2For 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 Docume
14、nt Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 2.2 ISO Standards:4ISO 3451/1-1981 PlasticsDetermination of Ash;Part 1:
15、General MethodsISO 1183-1987 Methods for Determining the Density andRelative Density of Noncellular Plastics3.Terminology3.1 This terminology used in this guide is in accordancewith Terminology D883 and Guide D5033.3.2 Definitions of Terms Specific to This Standard:3.2.1 chemicalsnonhazardous or haz
16、ardous materials(forexample,insecticides or herbicides)potentially used in contactwith plastic materials.3.2.2 glueadhesives used for labels or joining bottle parts(for example,ethylene-vinyl acetate).3.2.3 heavy metalsmetals heavier than sodium on theperiodic table(for example,lead,arsenic,cadmium,chromium,or copper).3.2.4 heavy plasticunfilled polymers such as polystyrene,poly(ethylene terephthalate),and poly(vinyl chloride)andfilled materials with densities greater than 1.00 g/cm3.3.2.5 light
