ASTM_D_2686_-_19.pdf

Designation:D268619Standard Specification forPolytetrafluoroethylene-Backed Pressure-SensitiveElectrical Insulating Tape1This standard is issued under the fixed designation D2686;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 U.S.Department of Defense.1.Scope*1.1 This specification covers electrical insulating tape con-sisting of a polytetrafluoroethylene(PTFE)film coated on oneside with a pressure-sensitive adhesive.1.2 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.NOTE1This standard is similar to IEC 60454-3-14.1.3 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade(TBT)Committee.2.Referenced Documents2.1 ASTM Standards:2D1000 Test Methods for Pressure-Sensitive Adhesive-Coated Tapes Used for Electrical and Electronic Applica-tionsD1711 Terminology Relating to Electrical Insulation2.2 IEC Standard:IEC 60454-3 Specifications for Pressure-Sensitive AdhesiveTapes for Electrical Insulation33.Terminology3.1 DefinitionsFor definitions of terms used in thisspecification,refer to Terminology D1711.4.Classification4.1 This specification covers two types of PTFE tape invarious thicknesses,as follows:4.1.1 Type IStandard backing coated with a silicone ad-hesive:4.1.1.1 Grade A0.050 mm(0.002 in.)backing thickness,and4.1.1.2 Grade B0.125 mm(0.005 in.)backing thickness.4.1.2 Type IIBondable backing tape coated with a siliconeadhesive:4.1.2.1 Grade A0.050 mm(0.002 in.)backing thickness,and4.1.2.2 Grade B0.125 mm(0.005 in.)backing thickness.5.Materials and Manufacture5.1 The tape shall comprise a backing consisting of a film oftetrafluorethylene polymer on one side of which has beenapplied a pressure-sensitive adhesive.The backing shall be freeof defects such as roughness and holes,and the adhesive layershall not show defects such as lumps or gels and bare areas.The slit edge of the tape shall be free of defects such as nicks.The adhesive shall not transfer when the tape is unwound fromthe roll.It is acceptable for the product to contain a releaseliner to assist the unwind and avoid transfer without affectingthe adhesion of the tape.6.Requirements6.1 All tapes shall meet the requirements given in Table 1for the grades specified.7.Standard Rolls7.1 The standard widths and lengths shall be selected fromthe following:7.1.1 Widths:mmin.mmin.61422789382511212301141558381121934502Widths greater than 50 mm(2 in.)shall be agreed uponbetween the purchaser and the seller.1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.07 on Electrical Insulating Materials.Current edition approved March 1,2019.Published March 2019.Originallyapproved in 1968.Last previous edition approved in 2012 as D2686 06(2012).DOI:10.1520/D2686-19.2For 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 StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards,Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade(TBT)Committee.1 7.1.2 Lengths:mftmft331085518050164662167.1.3 Nonstandard widths and lengths are permissible ifagreed to between the purchaser and seller.8.Test Methods8.1 Select the rolls,condition,and test in accordance withTest Methods D1000.9.Rejection9.1 If the test results of any roll do not conform to therequirements prescribed in the specification,two additionalrolls shall be selected and tested.If one of the two additionalsample rolls also does not conform to the requirements,it isacceptable for the purchaser to exercise the option of rejectingthe lot.10.Packaging and Package Marking10.1 PackagingThe packaging shall withstand shipmentand shall give the product ample protection against damage.The individual rolls shall not adhere to each other or to thecontainer.1