ASTM_D_2305_-_10.pdf

Designation:D230510Standard Test Methods forPolymeric Films Used for Electrical Insulation1This standard is issued under the fixed designation D2305;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.Scope1.1 These test methods cover the testing of homogeneousorganic polymer films not over 2.4 mm(95 mils)thick that areto be used for electrical insulation.1.2 These test methods are not necessarily applicable totesting films in combinations with a coating,another film,orwith other types of substrate,such as fabrics or papers.1.3 The values stated in SI units are the standard.The valuesin parentheses are provided for information only.1.4 The procedures appear in the following sections:ProcedureSectionsConditioning5 and 6Dielectric Breakdown Voltage&Dielectric Strength20 to 25Extractables64 to 69Heat-Seal Strength58 to 63Permittivity and Dissipation Factor41 to 46Resistance Method for Measuring the Tendency toCorrode Metals37 to 40Sampling4Shrinkage47 to 52Strain Relief12 to 19Surface Resistivity26 to 30Tensile Properties11Thickness7 to 10Volume Resistivity31 to 36Water Absorption52 to 571.5 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 establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.For a specificwarning statement see 23.1.NOTE1These test methods are similar to IEC 606742.2.Referenced Documents2.1 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 InsulationD257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD374 Test Methods for Thickness of Solid Electrical Insu-lation(Withdrawn 2013)3D570 Test Method for Water Absorption of PlasticsD882 Test Method for Tensile Properties of Thin PlasticSheetingD883 Terminology Relating to PlasticsD1000 Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applica-tionsD1531 Test Methods for Relative Permittivity(DielectricConstant)and Dissipation Factor by Fluid DisplacementProcedures(Withdrawn 2012)3D1676 Test Methods for Film-Insulated Magnet WireD1711 Terminology Relating to Electrical InsulationD5032 Practice for Maintaining Constant Relative Humidityby Means of Aqueous Glycerin SolutionsD6054 Practice for Conditioning Electrical Insulating Mate-rials for Testing(Withdrawn 2012)3E691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 IEC Standard:Publication 606742 Specification for Plastic Films for Elec-trical Purposes43.Terminology3.1 Definitions:3.1.1 Definitions are in accordance with TerminologiesD1711 and D883 unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 sheet,nmaterial greater than 75 mm in width.3.2.2 strain relief,nrelaxation at a specified elevatedtemperature of induced strains.1These test methods are under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and are the direct responsibility ofSubcommittee D09.07 on Flexible and Rigid Insulating Materials.Current edition approved Oct.1,2010.Published October 2010.Originallypublished in 1964.Last previous edition approved in 2002 as D2305 02.DOI:10.1520/D2305-10.2For 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.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.3 strip,nmaterial 75 mm or less in width.4.Sampling4.1 Remove the outer three or more layers down from theroll or stack of material before sampling.4.2 If the film is known or suspected to be anisotropic for agiven property,prepare and mark each test specimen toindicate the axis of maximum orientation.The axis parallel tothe direction of extrusion,or casting,is conventionally de-scribed as the machine direction and is abbreviated MD.Theaxis that is normal to both the MD axis and the thickness axisis conventionally described as the transverse direction and isabbreviated TD.4.3 Prepare test specimens suitable for each test fromsamples that have been cut across the entire width of thesampled material.If the w