1、Designation: D3308 12 (Reapproved 2017)Standard 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
2、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. Scope1.1 This specification covers skived tape in thicknessesfrom
3、 0.013 to 6.35 mm (0.0005 to 0.250 in.) manufactured byskiving (Note 1) from PTFE resin molding and extrusionmaterials.NOTE 1Skiving is the process of continuously shaving a film on alathe from the outer surface to the core of a molded cylindrical tube ofmaterial.NOTE 2Abbreviations have been approv
4、ed 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 add
5、ress all of the safety concerns, if any,associated with its use. It is the responsibility of the user of thisstandard to establish appropriate safety, health and environ-mental practices and determine the applicability of regulatorylimitations prior to use.NOTE 3This specification and ISO 13000-1 an
6、d ISO 13000-2 differ inapproach or detail, and data obtained using either may not be technicallyequivalent.1.4 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of Inter
7、national Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial
8、Power FrequenciesD374 Test Methods for Thickness of Solid Electrical Insu-lation (Metric) D0374_D0374MD618 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 Displaceme
9、ntD882 Test Method for Tensile Properties of Thin PlasticSheetingD883 Terminology Relating to PlasticsD1389 Test Method for Proof-Voltage Testing of Thin SolidElectrical Insulating Materials (Withdrawn 2013)3D1600 Terminology forAbbreviated Terms Relating to Plas-ticsD3892 Practice for Packaging/Pac
10、king of PlasticsD4894 Specification for Polytetrafluoroethylene (PTFE)Granular Molding and Ram Extrusion Materials2.2 ISO Standards:4ISO 13000-1 PlasticsPolytetrafluorethylene (PTFE) Semi-Finished Products Part 1: Requirements and DesignationISO 13000-2 PlasticsPolytetrafluorethylene (PTFE)Semi-Fini
11、shed Products Part 2: Preparation of Specimensand Determination of Properties3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology D883 unless otherwise specified.3.2 Definitions of Terms Specific to This Standard:3.2.1 lot, none production run, or a uniform blend of twoor mor
12、e 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:1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct respon
13、sibility of Subcommittee D20.15 on ThermoplasticMaterials (Section D20.15.12).Current edition approved Sept. 1, 2017. Published September 2017. Originallyapproved in 1974. Last previous edition approved in 2012 as D3308 - 12. DOI:10.1520/D3308-12R17.2For referenced ASTM standards, visit the ASTM web
14、site, 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 Na
15、tional 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 sta
16、ndard 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.14.1.
17、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.4.
18、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 resi
19、n, 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 : SpecialBloc
20、k : : : : Notes: ,Example: Specification D3308 06 I 2 . .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 theappropriate specified properties, tables, or both, in the specifi-c
21、ation identified.Acomma is used as the separator between theStandard number and the Type. Separators are not neededbetween the Type and Grade, because they are, in turn, Romannumerals and Arabic digits.5Provision for “Special Notes” isincluded so that other information can be provided whenrequired.
22、This example would be premium PTFE tape withoutspecial requirements. When Special Notes are used, theyshould be preceded by a comma.5. Physical Requirements5.1 The tape shall be made from unpigmented PTFE resin.5.2 The length and width of the roll shall be as agreed uponbetween the purchaser and the
23、 seller. Width tolerances shall bein accordance with Table 1.5.3 The melting point for all types of tape shall be 327 610C (621 6 18F).5.4 The thickness tolerances for skived tape shall be asshown in Table 2.5.5 Tensile strength and elongation shall meet the require-ments shown in Table 3.5.6 The re
24、quirements for specific gravity shall be as shownin Table 3.5.7 The minimum required values for dielectric strength S(V/mil), shall be computed for applicable thicknesses ofmaterials in accordance with the following formulas, where t isthe thickness of the tape in mils.Type I: S = 1000 times square
25、root of (20/t)Type II (thickness 0.003 in.): S = 840 times square root of(20/t)Type II (thickness 3.175 0.1250 0.254 0.0100D3308 12 (2017)28.1.3 ThicknessMeasure thickness in accordance withMethod A of Test Methods D374, for all thicknesses.8.1.4 Melting PointDetermine the melting point on onespecim
26、en in accordance with the test method stated in Speci-fication D4894.NOTE 4Use of alternate methods or equipment for the measurementof thickness is permitted with agreement between producer and buyer.8.1.5 Tensile PropertiesDetermine the tensile strength andpercentage elongation at break in accordan
27、ce with Test MethodD638, for tapes or films 1.0 mm (0.04 in.) thick or greater,using Type I specimen at 20 in./min 6 10 %. For tapes or filmsless than 1.0 mm (0.04 in.) thick, determine the tensile strengthand percentage elongation at break in accordance with TestMethod D882.8.1.6 Dielectric Strengt
28、hDetermine the dielectric strengthin accordance with Test Methods D149 using the short timetest. Use air as the test medium for tapes up to and including0.254 mm (0.010 in.) in thickness. For tapes greater than 0.254mm (0.010 in.) thick, or where specimen configuration couldresult in flashover or pa
29、rtial discharge (corona) during the test,the test medium shall be oil. Use three specimens in determin-ing the dielectric strength of each lot of tape.”NOTE 5Dielectric values obtained in oil is a requirement for thelaminate industry. Therefore, it is necessary to test dielectric strength in oilwhen
30、 requested by these customers. Values obtained when testing thinskived tape in oil are significantly different than those obtained using theair method.8.1.7 Specific GravityDetermine the specific gravity ontwo specimens in accordance with Method A of Test MethodsD792.Add 2 drops of a wetting agent (
31、liquid detergent or othersurfactant) to the water in order to reduce the surface tensionand ensure complete wetting of the sample.8.1.8 Electrical FlawsUse Test Method D1389 for thedetermination of electrical flaws.9. Inspection9.1 Inspection and certification of the material supplied withreference
32、to a specification based on this classification systemshall be for conformance to the requirements specified herein.9.2 Lot-acceptance shall be the basis on which acceptanceor rejection of the lot is made. Lot-acceptance testing shallconsist of the tests seen in Section 8.9.3 Periodic check inspecti
33、on with reference to a specifica-tion based on this classification system shall consist of the testsfor all requirements of the material under the specification.9.4 Certification shall be that the material was manufacturedby a process in statistical control, sampled, tested, and in-spected in accord
34、ance with this classification system, and thatthe average values for the lot meet the requirements of thespecification (line callout).9.5 A report of test results shall be furnished when re-quested. The report shall consist of results of the lot-acceptanceinspection for the shipment and the results
35、of the most recentperiodic-check inspection.10. Packaging and Marking10.1 PackagingThe material shall be packaged in stan-dard commercial containers so constructed as to ensure accep-tance by common or other carriers for safe transportation at thelowest rate to the point of delivery, unless otherwis
36、e specifiedin the contract or order.10.2 MarkingShipping containers shall be marked withthe name of the material, type, size, and quantity containedtherein. Each roll of tape shall be marked to designate type,grade, and lot number. The marking will be, preferably, on thecore.10.3 All packing, packag
37、ing, and marking provisions ofPractice D3892 shall apply to this specification.10.4 Packaging and marking requirements defined by thepurchaser shall take precedence over the above.11. Keywords11.1 fluorocarbon polymer; fluoropolymers; granular PTFE;polytetrafluoroethylene; PTFE; PTFE basic shapes; P
38、TFE film;PTFE skived tapeASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentionedin this standard. Users of this standard are expressly advised that determination of the validity of any such patent rights, and the riskof infring
39、ement of such rights, are entirely their own responsibility.This standard is subject to revision at any time by the responsible technical committee and must be reviewed every five years andif not revised, either reapproved or withdrawn. Your comments are invited either for revision of this standard
40、or for additional standardsand should be addressed to ASTM International Headquarters. Your comments will receive careful consideration at a meeting of theresponsible technical committee, which you may attend. If you feel that your comments have not received a fair hearing you shouldmake your views
41、known to the ASTM Committee on Standards, at the address shown below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959,United States. Individual reprints (single or multiple copies) of this standard may be obtained by contacting
42、ASTM at the aboveaddress or at 610-832-9585 (phone), 610-832-9555 (fax), or serviceastm.org (e-mail); or through the ASTM website(www.astm.org). Permission rights to photocopy the standard may also be secured from the Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 3 Mechanical Requirements for Skived TapeTypeTensile Strength,AminElongation,min,%SpecificGravityMPa psiI 27.58 4000 300 2.14 to 2.19II 19.31 2800 200 2.14 to 2.19III 11.00 1600 75 2.14 minIV 9.66 1400 50 2.14 minATape 6.35 mm (14 in.) or wider.D3308 12 (2017)3
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