ASTM_D_3308_-_12.pdf

Designation:D330812Standard Specification forPTFE Resin Skived Tape1This standard is issued under the fixed designation D3308;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.This standard has been approved for use by agencies of the Department of Defense.1.Scope*1.1 This specification covers skived tape in thicknessesfrom 0.013 to 6.35 mm(0.0005 to 0.250 in.)manufactured byskiving(Note 1)from PTFE resin molding and extrusionmaterials.NOTE1Skiving is the process of continuously shaving a film on alathe from the outer surface to the core of a molded cylindrical tube ofmaterial.NOTE2Abbreviations have been approved from Terminology D1600.1.2 The values stated in inch-pound units are to be regardedas standard.The values given in parentheses are for informa-tion only.1.3 The following hazard caveat pertains only to the testmethod portion,Section 8,of this specification:This standarddoes not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the user of thisstandard to establish appropriate safety and health practicesand determine the applicability of regulatory limitations priorto use.NOTE3This specification and ISO 13000-1 and ISO 13000-2 differ inapproach or detail,and data obtained using either may not be technicallyequivalent.2.Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD374 Test Methods for Thickness of Solid Electrical Insu-lationD618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD792 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 PlasticsD1389 Test Method for Proof-Voltage Testing of Thin SolidElectrical Insulating MaterialsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD3892 Practice for Packaging/Packing of PlasticsD4894 Specification for Polytetrafluoroethylene(PTFE)Granular Molding and Ram Extrusion Materials2.2 ISO Standards:ISO 13000-1 PlasticsPolytetrafluorethylene(PTFE)Semi-Finished Products Part 1:Requirements and Designation3ISO 13000-2PlasticsPolytetrafluorethylene(PTFE)Semi-Finished Products Part 2:Preparation of Specimensand Determination of Properties33.Terminology3.1 Definitions:Definitions are in accordance with Terminology D883 unlessotherwise specified.3.2 Definitions of Terms Specific to this Standard:3.2.1 lot,nOne production run,or a uniform blend of twoor more production runs.3.2.2 film,nfull-width material received as finished film.3.2.3 Mil,n11000(0.001)of an inch.4.Classification4.1 This specification covers four types of PTFE resinskived tape:4.1.1 Type IPremium;normally used for exactingelectrical,mechanical,or chemical applications.4.1.2 Type IIGeneral purpose;for electrical,mechanical,and chemical applications not requiring premium material.4.1.3 Type IIICommercial;for non-critical chemical,electrical,and mechanical applications.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials(Section D20.15.12).Current edition approved Aug.1,2012.Published September 2012.Originallyapproved in 1974.Last previous edition approved in 2006 as D3308-06.DOI:10.1520/D3308-12.2For 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,25 W.43rd St.,4thFloor,New York,NY 10036.*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 4.1.4 Type IVUtility;having no electrical requirements,and with mechanical properties at lower level.4.2 Types I,II,III,and IV may be subdivided into twogrades in accordance with the base resin used as follows:4.2.1 Grade 1Made only from virgin resin.4.2.2 Grade 2May be made using reprocessed resin,or amixture of virgin and reprocessed resin.4.3 A one-line system may be used to specify materialscovered by this specification.The system uses predefined cellsto refer to specific aspects of this specification,as illustratedbelow:SpecificationStandard Number:Type:Grade:Class:SpecialBlock:Notes:,Example:Specification D3308 06I2.For this example,the line callout would be:SpecificationD3308 06,I2,Oil and would specify a skived tape that has allof the properties listed for that Type and Grade,in theappropr