ASTM_D_3369_-_01.pdf

Designation:D 3369 01Standard Specification forPolytetrafluoroethylene(PTFE)Resin Cast Film1This standard is issued under the fixed designation D 3369;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(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 PTFE-fluorocarbon resin castfilm in thicknesses from 0.025 to 0.127 mm(0.001 to 0.005in.).1.2 PTFE film and sheet are made by several differentprocesses and the properties of the products reflect both thedifferent starting polymers and the different processes.Proper-ties that are affected include,but are not limited to:tensilestrength and elongation at break,porosity,anisotropy,andmolecular weight.Arelated standard is Specification D 3308.Itis important to examine each of the other standards to select theone appropriate for the application.1.3 The values in SI units are to be regarded as standard.The units given in parentheses are for information only.NOTE1There is no similar or equivalent ISO standard.1.4 The following precautionary caveat pertains only to thetest methods portion,Section 7,of this specification.Thisstandard does not purport to address all of the safety concerns,if any,associated with its use.It is the responsibility of the userof this standard to establish appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.2.Referenced Documents2.1 ASTM Standards:D 149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Electrical Insulating Materials atCommercial Power Frequencies2D 374 Test Methods for Thickness of Solid Electrical Insu-lation2D 618 Practice for Conditioning Plastics for Testing3D 792 Test Methods for Density and Specific Gravity(Rela-tive Density)of Plastics by Displacement3D 883 Terminology Relating to Plastics3D 1389 Test Method for Proof-Voltage Testing of ThinSolid Electrical Insulating Materials2D 3308 Specification for PTFE Resin Skived Tape4D 3892 Practice for Packaging/Packing of Plastics4D 4895 Specification for Polytetrafluoroethylene(PTFE)Resins Produced from Dispersion53.Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology D 883.3.1.1 lot,none production run or a uniform blend of twoor more production runs.4.Classification4.1 This specification covers one type of TFE-fluorocarbonresin cast film.5.Physical Requirements5.1 The film shall conform to the property values specifiedin Table 1.5.2 The length and width of the film shall be as agreed uponbetween the purchaser and the manufacturer.The tolerance inlength and width shall be+6.35 mm,0 mm(+0.25 in.,0in.).5.3 Thickness tolerances shall be as specified in Table 2when measured at any point at a temperature range from 23 to30C(73.4 to 86F).5.4 The film shall be natural in color and may vary fromcloudy to milky transparent,depending upon thickness.5.5 The material shall be essentially free of surface blisters,wrinkles,cracks,and other surface defects,unless otherwiseagreed upon between purchaser and manufacturer.5.6 One or both sides of the material shall be given a surfacetreatment to enable the surface to take adhesives or printinginks.1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved November 10,2001.Published January 2002.Origi-nally published as D 3369 75.Last previous edition D 3369 96.2Annual Book of ASTM Standards,Vol 10.01.3Annual Book of ASTM Standards,Vol 08.01.4Annual Book of ASTM Standards,Vol 08.02.5Annual Book of ASTM Standards,Vol 08.03.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959,United States.6.Sampling6.1 Sampling shall be statistically adequate to satisfy therequirements of 9.4.7.Test Methods7.1 ConditioningFor those tests where conditioning isrequired,condition the test specimens in accordance withProcedure A of Practice D 618 for a period of at least 4 h priorto test.If the test material has been exposed to temperaturesbelow 20C within 24 h prior to test,the conditioning shall befor at least 24 h.7.2 Test ConditionsConduct tests at the standard labora-tory temperature of 23.0 6 2C(73.4 6 3.6F).The mainte-nance of constant humidity is not necessary.In reference cases,the standard atmosphere,50 6 5%relative humidity,shallapply.7.3 ThicknessMake measurements of thickness in accor-dance with Method A of Test Methods D 374.7.4 Melting PointDetermine the melting point in accor-dance with Specification D 4895.7.5 Tensile PropertiesDetermine the tensile strength andelongation in accordance with Specification D 4895