1、Designation:D70499(Reapproved 2020)Standard Specification forMelamine-Formaldehyde Molding Compounds1This standard is issued under the fixed designation D704;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A
2、 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 specification covers compression molding,thermo
3、setting,melamine-formaldehyde molding compoundsas further defined in 4.1,resin binder,with or without otherresins,intimately combined with fillers,pigments,and anychemical agents needed.1.2 The values stated in SI units are to be regarded as thestandard.NOTE1The properties included in this specifica
4、tion are those requiredto identify the types of molding compounds covered.There may be otherrequirements necessary to identify particular characteristics.These will beadded to the specification as their inclusion becomes generally desirableand the necessary test data and methods become available.Tra
5、nsfer orinjection molding will usually result in different physical and electricalcharacteristics than compression molding.NOTE2ISO 2122-1977(E)is similar but not equivalent to thisspecification.Product classification and characterization are not equiva-lent.1.3 This international standard was devel
6、oped 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 Document
7、s2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD150 Test Methods for AC Loss Characteristics and Permit-tivity(Dielectric Constant)of Solid Electrical InsulationD256 Test Methods for
8、 Determining the Izod PendulumImpact Resistance of PlasticsD495 Test Method for High-Voltage,Low-Current,Dry ArcResistance of Solid Electrical InsulationD570 Test Method for Water Absorption of PlasticsD618 Practice for Conditioning Plastics for TestingD648 Test Method for Deflection Temperature of
9、PlasticsUnder Flexural Load in the Edgewise PositionD731 Test Method for Molding Index of ThermosettingMolding PowderD790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastics and Electrical Insulating Materi-alsD792 Test Methods for Density and Specific Gravity(Rela-tive Densi
10、ty)of Plastics by DisplacementD883 Terminology Relating to PlasticsD1895 Test Methods for Apparent Density,Bulk Factor,andPourability of Plastic MaterialsD1896/D1896M Practice for Transfer Molding Test Speci-mens of Thermosetting CompoundsD3638 Test Method for Comparative Tracking Index ofElectrical
11、 Insulating MaterialsD3795 Test Method for Thermal Flow,Cure,and BehaviorProperties of Pourable Thermosetting Materials by TorqueRheometerD3892 Practice for Packaging/Packing of PlasticsD5224 Practice for Compression Molding Test Specimens ofThermosetting Molding CompoundsD6289 Test Method for Measu
12、ring Shrinkage from MoldDimensions of Molded Thermosetting Plastics2.2 ASTM Manual:Manual 7 Manual on Presentation of Data and Control ChartAnalysis,8th Edition32.3 ISO Standard:ISO2122-1977(E)PlasticsAminoplasticMoldingMaterialsSpecification43.Terminology3.1 DefinitionsFor definitions of technical
13、terms pertain-ing to plastics used in this specification see Terminology D883.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.16 on ThermosettingMaterials.Current edition approved Dec.1,2020.Published December 2020.O
14、riginallyapproved in 1943.Last previous edition approved in 2012 as D704-99(2012).DOI:10.1520/D0704-99R20.2For 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 D
15、ocument Summary page onthe ASTM website.3Available from ASTM International Headquarters.Request MNL78TH.4Available 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
16、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.Classification4.1 The molding compounds covered by this specificationshall be designat
