ASTM_D_705_-_99_2012.pdf

Designation:D70599(Reapproved 2012)Standard Specification forUrea-Formaldehyde Molding Compounds1This standard is issued under the fixed designation D705;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,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.1.Scope*1.1 Thisspecificationcoverscompressionmoldingthermosetting,urea-formaldehyde molding compounds as fur-ther defined in 3.1.1.2 The values stated in SI units are to be regarded as thestandard.NOTE1The properties included in this specification are those requiredto identify the types of molding compounds covered.There may be otherrequirements necessary to identify particular characteristics.Transfer orinjection molding will usually result in different physical and electricalcharacteristics than compression molding.1.3 The following safety hazards caveat pertains only to thetest method portion,Section 7,of this specification:Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.NOTE2ISO 2112-1977(E)is similar but not equivalent to thisspecification.Product classification and characterization are not the same.2.Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD256 Test Methods for 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 TestingD790 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Density)of Plastics by DisplacementD956 Practice for Compression Molding Specimens ofAmino Molding Compounds(Withdrawn 1992)3D3892 Practice for Packaging/Packing of Plastics2.2 ISO Standard:ISO2112-1977(E)PlasticsAminoplasticMouldingMaterialsSpecification43.Classification3.1 The molding compounds covered by this specificationshall be designated by types,based upon their principalcharacteristics and the fillers used.3.1.1 Type 1A general purpose molding compound withalpha-cellulose filler.3.1.2 Type 2A general purpose molding compound withcellulose filler other than alpha-cellulose.4.General Requirements4.1 The molding compounds shall be of uniform composi-tion.The apparent density,bulk factor,plasticity,particle size,and color shall be compounded as to conform to the require-ments prescribed in this specification.5.Detail Requirements5.1 Test specimens molded in accordance with PracticeD956 shall conform to the requirements prescribed in Table 1.6.Sampling6.1 A batch of molding compound shall be considered as aunit of manufacture as prepared for shipment and may consistof a blend of two or more production runs.6.2 Adequate statistical sampling shall be used.7.Test Methods7.1 The properties enumerated in this specification shall bedetermined in accordance with the following methods: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.1,2012.Published December 2012.Originallyapproved in 1943.Last previous edition approved in 2004 as D705-99(2004).DOI:10.1520/D0705-99R12.2For 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 Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.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 ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 7.1.1 Conditioning Test SpecimensMolded test specimensshall be conditioned in accordance with Procedure B ofPractice D618,except for the tests for arc resistance anddielectric strength,where Procedure A shall be used.7.1.2 Test ConditionsTests shall be conducted in thestandard laboratory atmosphere of 23 6 1C and 50 6 2%relative humidity,unless otherwise specified in the testingmethods or in this specification.7.1.3 Specific GravityMethod A of Test Methods D792.7.1.4 Flexural StrengthTest Methods D790,Procedure A,Method I,using a 6.4 by 12.7 by 127-mm bar tested parallel tomolding pressure.7.1.5 Impact Resistance(Izod)