1、Designation:D70499(Reapproved 2012)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 Department of Defense.1.Scope*1.1 This specification covers compression molding,thermosett
3、ing,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 specification
4、 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.Transfe
5、r 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.2.Referenced Documents2.1 ASTM Standards:2D14
6、9 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 Determining the Izod Pe
7、ndulumImpact 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 PlasticsUnder Flexural L
8、oad 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 Density)of Plastics by Displa
9、cementD883 Terminology Relating to PlasticsD1895 Test Methods for Apparent Density,Bulk Factor,andPourability of Plastic MaterialsD1896 Practice for Transfer Molding Test Specimens ofThermosetting CompoundsD3638 Test Method for Comparative Tracking Index ofElectrical Insulating MaterialsD3795 Test M
10、ethod 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 Measuring Shrinkage from MoldDimension
11、s 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 terms pertain-ing to plastics use
12、d in this specification see Terminology D883.4.Classification4.1 The molding compounds covered by this specificationshall be designated by types,based upon their principalcharacteristics and the fillers used.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the di
13、rect responsibility of Subcommittee D20.16 on ThermosettingMaterials.Current edition approved Dec.1,2012.Published December 2012.Originallyapproved in 1943.Last previous edition approved in 2004 as D704-99(2004).DOI:10.1520/D0704-99R12.2For referenced ASTM standards,visit the ASTM website,www.astm.o
14、rg,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 ASTM International Headquarters.Request MNL78TH.4Available from American National Standards Institute(ANSI),25 W.4
15、3rd St.,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 States1 4.1.1 Type 1General-purpose compound with cellulosefiller,available in
16、 colors,white,and black.Suitable for general,mechanical,and electrical applications.4.1.2 Type 2A mineral-and flock-filled compound forindustrial uses involving elevated-temperature and electricalapplications.4.1.3 Type 3Acompound with chopped cotton-cloth filler,having greater impact strength than the other Types 1 through7.4.1.4 Type 5Unreinforced molding compound with hightranslucency,particularly suited for small pearlescent mold-ings.4.1.5 Type 6A wood-filled compound for general indus-tria
