ASTM_D_6040_-_12.pdf

Designation:D604012Standard Guide toStandard Test Methods for UnsinteredPolytetrafluoroethylene(PTFE)Extruded Film or Tape1This standard is issued under the fixed designation D6040;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 This guide identifies test methods to use in evaluatingunsintered extruded films or tapes manufactured from polytet-rafluoroethylene.1.2 The values stated in SI units as detailed in IEEE/ASTMSI 10,are to be regarded as standard.1.3 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.NOTE1This test method is equivalent to ISO 12086-2:2006 in themeasurement of tensile properties,specific gravity,and dielectric constant.These are in ISO 12086-2:2006,sections 8.2.2,10.6 and 8.1.1.It is notequivalent to ISO 12086-2:2006 in any other measurement or section.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-lationD792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by DisplacementD882 Test Method for Tensile Properties of Thin PlasticSheetingD883 Terminology Relating to PlasticsD1711 Terminology Relating to Electrical InsulationD3776 Test Methods for Mass Per Unit Area(Weight)ofFabricF335 Terminology Relating to Electrostatic ImagingF412 Terminology Relating to Plastic Piping SystemsIEEE/ASTM SI 10 Standard for Use of the InternationalSystem of Units(SI):The Modern Metric System2.2 ISO Standard:ISO 12086-2:2006 PlasticsFluoropolymer Dispersionsand Moulding and Extrusion MaterialsPart 2:Prepara-tion of Test Specimens and Determination of Properties33.Terminology3.1 Definitions:3.1.1 Definitions are in accordance with Test Methods D257and Terminologies D883 and D1711,unless otherwise speci-fied.3.1.2 apparent density,nthe weight per unit volume of amaterial including voids inherent in the material as tested,seeTerminology F412.3.1.3 lot,none production run,or uniform blend of two ormore production runs.3.2 Definitions of Terms Specific to This Standard:3.2.1 film,nfull-width material received as finished film.3.2.2 tape,nmaterial that has been slit from the finishedfilm.3.2.3 volume resistivity,nthe volume resistance(in ohm-centimetres)between opposite faces of a material where thevalues are obtained by the measure of resistance to electricalcurrent between electrodes placed in contact with the opposingsurfaces of the sample(see Terminology F335).4.Test Specimens4.1 The number of test specimens shall be in accordancewith the requirements of the individual test methods.5.Conditioning5.1 Condition the tape for 4 h and conduct tests at thestandard laboratory temperature of 23 6 2C 73.4 6 3.6F,1This guide is under the jurisdiction of ASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.Current edition approved Aug.1,2012.Published September 2012.Originallyapproved in 1996.Last previous edition approved in 2006 as D6040-06.DOI:10.1520/D6040-12.2For 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.3Available 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 unless otherwise specified in the test methods or required in aspecification.Since the tape or film does not absorb water,themaintenance of constant humidity during testing is not impor-tant.6.Width6.1 Determine width measurements using a steel scalehaving divisions at a minimum of 0.5-mm 164-in.intervals.6.2 Test at least one specimen from each lot.6.3 Each test specimen shall be approximately 450 mm 18in.in length.Place the specimens on a hard smooth surface.Measure the width perpendicular to the edge of the steel scale,at three approximately equally spaced points along the length.6.4 Report the average width in millimetres or inches plusthe maximum and minimum values if they are required by aspecificati