1、Designation: D 3308 06Standard Specification forPTFE Resin Skived Tape1This standard is issued under the fixed designation D 3308; 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 i
2、ndicates the year of last reapproval. Asuperscript epsilon (e) 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
3、.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 approved from TerminologyD
4、1600.1.2 The values stated in inch-pound units are to be regardedas standard. The values given in brackets are for informationonly.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 con
5、cerns, 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.NOTE 3This specification and ISO 13000-1 and ISO 13000-2 differ inapproach or detail,
6、and data obtained using either may not be technicallyequivalent.2. Referenced Documents2.1 ASTM Standards:2D 149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD 374 Test Methods for Thickness of Solid Electr
7、ical Insu-lationD 618 Practice for Conditioning Plastics for TestingD 638 Test Method for Tensile Properties of PlasticsD 792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by DisplacementD 882 Test Method for Tensile Properties of Thin PlasticSheetingD 883 Terminology
8、 Relating to PlasticsD 1389 Test Method for Proof-Voltage Testing of ThinSolid Electrical Insulating MaterialsD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 3892 Practice for Packaging/Packing of PlasticsD 4894 Specification for Polytetrafluoroethylene (PTFE)Granular Molding and Ram E
9、xtrusion Materials2.2 ISO Standards:ISO 13000-1 PlasticsPolytetrafluorethylene (PTFE)Semi-Finished Products Part 1: Requirements and Desig-nation3ISO 13000-2 PlasticsPolytetrafluorethylene (PTFE)Semi-Finished Products Part 2: Preparation of Specimensand Determination of Properties33. Terminology3.1
10、Definitions:Definitions are in accordance with Terminology D 883unless otherwise 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
11、(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 exacting electri-cal, mechanical, or chemical applications.4.1.2 Type IIGeneral purpose; for electrical, mechanical,and chemical applications not requiring pre
12、mium material.4.1.3 Type IIICommercial; for non-critical chemical,electrical, and mechanical applications.4.1.4 Type IVUtility; having no electrical requirements,and with mechanical properties at lower level.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the di
13、rect responsibility of Subcommittee D20.15 on ThermoplasticMaterials (Section D20.15.12).Current edition approved April 1, 2006. Published June 2006. Originallyapproved in 1974. Last previous edition approved in 2001 as D 3308 - 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org
14、, 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 10036.1*A Summary of Changes sectio
15、n appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.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 r
16、esin.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:Specificatio
17、nStandard Number : Type :Grade : Class : SpecialBlock : : : : Notes: ,Example: Specification D 3308 06 I 2 . .For this example, the line callout would be: SpecificationD 3308 06, I2, Oil and would specify a skived tape that hasall of the properties listed for that Type and Grade, in theappropriate s
18、pecified properties, tables, or both, in the specifi-cation 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.4Provision for “Special Notes” isincluded so
19、 that other information can be provided whenrequired. 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 rol
20、l shall be as agreed uponbetween the purchaser and the 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 shal
21、l meet the require-ments shown in Table 3.5.6 The requirements 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 thicknes
22、s of the tape in mils.Type I: S = 1000 times square 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 60.254 60.0100TABLE 3 Mechanical Requirements for Skived TapeTypeTensile Strength,AminElongation,min,%SpecificGravityMPa psiI 27.58 4000
23、 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.D33080628.1.3 ThicknessMeasure thickness in accordance withMethod A of Test Methods D 374, for all thicknesses.8.1.4 Melting PointDetermine the melting point on onespecime
24、n in accordance with the test method stated in Speci-fication D 4894.8.1.5 Tensile PropertiesDetermine the tensile strengthand percentage elongation at break in accordance with TestMethod D 638, for tapes or films 1.0 mm 0.04 in. thick orgreater, using Type I specimen at 20 in./min 6 10 %. For tapes
25、or films less than 1.0 mm 0.04 in. thick, determine the tensilestrength and percentage elongation at break in accordance withTest Method D 882.8.1.6 Dielectric StrengthDetermine the dielectric strengthin accordance with Test Methods D 149 using the short timetest. Use air as the test medium for tape
26、s 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 partial discharge (corona) during the test,the test medium shall be oil. Use three specimens in determin-ing the dielectric strength of ea
27、ch lot of tape.”NOTE 4Dielectric values obtained in oil is a requirement for thelaminate industry. Therefore, it is necessary to test dielectric strength in oilwhen requested by these customers. Values obtained when testing thinskived tape in oil are significantly different than those obtained using
28、 theair method.8.1.7 Specific GravityDetermine the specific gravity ontwo specimens in accordance with Method A of Test MethodsD 792. Add 2 drops of a wetting agent (liquid detergent orother surfactant) to the water in order to reduce the surfacetension and ensure complete wetting of the sample.8.1.
29、8 Electrical FlawsMethods D 1389.9. Inspection9.1 Inspection and certification of the material supplied withreference 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 reject
30、ion of the lot is made. Lot-acceptance testing shallconsist of the tests seen in Section 89.3 Periodic check inspection 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 shal
31、l be that the material was manufacturedby a process in statistical control, sampled, tested, and in-spected in accordance 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 w
32、hen re-quested. The report shall consist of results of the lot-acceptanceinspection for the shipment and the results 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-
33、tance by common or other carriers for safe transportation at thelowest rate to the point of delivery, unless otherwise 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
34、 marked to designate type,grade, and lot number. The marking will be, preferably, on thecore.10.3 All packing, packaging, and marking provisions ofPractice D 3892 shall apply to this specification.10.4 Packaging and marking requirements defined by thepurchaser shall take precedence over the above.11
35、. Keywords11.1 fluorocarbon polymer; fluoropolymers; granular PTFE;polytetrafluoroethylene; PTFE; PTFE basic shapes; PTFE film;PTFE skived tapeSUMMARY OF CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue,D 3308 - 01, that may impact the use of
36、 this standard. (April 1, 2006)(1) Amended verbiage in 3.2.1 defining “lot” to be consistentwith other D20.15.12 standards.(2) Changed mils to mil in section 3.2.3.(3) Changed to table and text in 4.3 to reflect revision year2006.(4) Changed dielectric calculation method for thin film Type IImateria
37、ls in 5.7. When 0.0005 in. through 0.0029 in. wereadded as part of the scope of this standard, it was recognizedthat physical properties for thin film could be affected. Theelongation was reduced at that time from 270 % to 200 % butdielectric was not changed. Dielectric strength is affected inthese
38、thinner films and the change serves to accommodatethese changes.(5) Changed wording in 8.1.6.(6) Changed wording in 8.1.7 and removed footnote thatrecommends a specific brand of wetting agent.(7) Added 10.4.(8) Revised Table 1 with the following changes: a) Correctedtypo where width tolerance was th
39、e same for 2 in. and 3 in.rolls in millimetres but different in inches. b) Corrected typowhere width tolerance for 6 in. rolls was different in millime-tres than in inches. c) Corrected typo where width tolerance for12 in. rolls was different in millimetres than in inches. d)Revised eliminate ambigu
40、ity in tolerances of material, which isslit to widths between standard inches.(9) Revised Table 2 with the following changes: a) Amendedranges to include 0.0001 in. increments as typically these unitsof measure are used in thin film production. b) Revised metricconverted values to reflect changes ma
41、de to inch/decimal units.(10) Removed reference to “FDIS” from Note 3.D3308063(11) Removed the word “oil” in example given in Section 4,and amended related wording below example.(12) Revised 5.2.(13) Revised 5.8 to delete reference to agreement betweenpurchaser and seller and the instance of “permis
42、sible electricalflaws”.(14) Revised 9.2.ASTM 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
43、 riskof infringement 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
44、 this standard 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 shouldm
45、ake your views 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 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).D3308064
