1、Designation:D329415Standard Specification forPolytetrafluoroethylene(PTFE)Resin Molded Sheet andMolded Basic Shapes1This standard is issued under the fixed designation D3294;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of
2、 last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope*1.1 This specification establishes requirements and methodsof test for the material,dimensions,and workmanship,and thephysica
3、l and electrical properties of molded sheet in minimumthicknesses of 0.794 mm(132in.)manufactured from PTFEresin molding materials defined in Specification D4894.1.2 This specification also establishes requirements formolded basic shapes made from molding materials.Thisspecification is for products
4、300 mm(12 in.)or less in adimension parallel to and 12.7 mm(0.5 in.)or greater in thedimension perpendicular to the direction of the applied mold-ing pressure.1.3 The values stated in SI units are to be regarded as thestandard.1.4 The following precautionary caveat pertains only to thetest method po
5、rtion,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
6、 prior to use.Special attention is called to 13.2,13.3,13.6,13.8,and A1.NOTE1There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2D149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Powe
7、r FrequenciesD374 Test Methods for Thickness of Solid Electrical Insu-lation(Withdrawn 2013)3D618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD792 Test Methods for Density and Specific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 DisplacementD883 Term
8、inology Relating to PlasticsD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD1708 Test Method for Tensile Properties of Plastics by Useof Microtensile SpecimensD3892 Practice for Packaging/Packing of PlasticsD4591 Test Method for Determining Temperatures andHeats of Transitions of Fluoro
9、polymers by DifferentialScanning CalorimetryD4894 Specification for Polytetrafluoroethylene(PTFE)Granular Molding and Ram Extrusion MaterialsD5947 Test Methods for Physical Dimensions of SolidPlastics SpecimensE94 Guide for Radiographic ExaminationIEEE/ASTM SI-10 American National Standard for Use o
10、fthe International System of Units(SI):The Modern MetricSystem3.Terminology3.1 Definitions:3.1.1 Definitions are in accordance with Terminology D883unless otherwise specified.3.1.2 lot,none continuous production run or a uniformblend of two or more production runs of one size sheet ormolded basic sh
11、ape.3.2 Abbreviations:3.2.1 Abbreviations are in accordance with TerminologyD1600.4.Classification4.1 This specification covers the following four types ofmolded basic sheets and shapes:4.1.1 Type IPremium;normally used for exactingelectrical,mechanical,or chemical applications.1This specification i
12、s 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 Sept.1,2015.Published September 2015.Originallyapproved in 1974.Last previous edition approved in 2009 as D3294-09.D
13、OI:10.1520/D3294-15.2For 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.3The last approved version of this historical
14、standard is referenced onwww.astm.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 States1 4.1.2 Type IIGeneral purpose;for electrical,mechanical,and chemical applications not re
15、quiring premium material.4.1.3 TypeIIIMechanicalGrade;fornon-criticalchemical,electrical,and mechanical applications.4.1.4 Type IVUtility;having no electrical requirementsand with mechanical properties at a lower level.4.2 Types I,II,and III shall be subdivided into two gradesas follows:4.2.1 Grade
16、1made only from virgin resin.4.2.2 Grade 2made using reprocessed resin.4.3 The grades shall be further subdivided into three classesas follows:4.3.1 Class Aresistant to thermal dimensional change notexceeding 0.5%.4.3.2 Class Bthermal dimensional change not exceeding5.0%.4.3.3 Class Cno requirement for thermal dimensionalchange.4.4 A one-line system shall be used to specify materialscovered by this specification.The system uses predefined cellsto refer to specific aspects of this specification,a
