ASTM_D_7471_-_09_2014.pdf

Designation:D747109(Reapproved 2014)Standard Specification forCPT-Fluoropolymer Molding and Extrusion Materials1This standard is issued under the fixed designation D7471;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.1.Scope1.1 Thisspecificationcoverscopolymersofchlorotrifluoroethylene,perfluoroalkoxy,and tetrafluoroethyl-ene and are suitable for extrusion,compression,and injectionmolding.1.2 This specification does not cover blended materials anddoes not cover recycled materials.1.3 The values stated in SI units as detailed in IEEE/ASTMSI-10 are to be regarded as the standard.The values given inparentheses are for information only.1.4 The following safety hazards caveat pertains only to thetest method portion,Section 11,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.NOTE1There is no known ISO equivalent to this standard.2.Referenced Documents2.1 ASTM Standards:2D618 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 Terminology Relating to PlasticsD1238 Test Method for Melt Flow Rates of Thermoplasticsby Extrusion PlastometerD1600 Terminology forAbbreviated Terms Relating to Plas-ticsD3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystallization of Polymers byDifferential Scanning CalorimetryD3892 Practice for Packaging/Packing of PlasticsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsIEEE/ASTM SI-10 Use of the International System of Units(SI):The Modem Metric System3.Terminology3.1 GeneralThe terminology given in Terminology D883is applicable to this specification.3.2 Definitions:3.3 lot,none production run or a uniform blend of two ormore production runs.3.4 GeneralThe abbreviated terms given in TerminologyD1600 are applicable to this specification.4.Classification4.1 This specification covers one type of fluoropolymersupplied in pellet form classified according to their meltingpoint.The resins of each type are divided into four gradesaccording to their melt flow rate.4.2 An one-line system shall be used to specify materialscovered by this specification.The system uses predefined cellsto refer to specific aspects of this specification,as illustrated asfollows:Specification _Standard Number:Type:Grade:SpecialBlock:Notes:,:Example:Specification D7471-09,I2For this example,the line callout shall be,SpecificationD7471 09,I2 and shall specify a fluoropolymer that has all ofthe properties listed for that type and grade in the appropriatespecified properties,or tables,or both,in the specificationidentified.A comma is used as the separator between thestandard number and the type.Separators are not neededbetween the group and grade.35.General Requirements5.1 The material shall be of uniform composition and soprepared as to conform to the requirements of this specifica-tion.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 March 1,2014.Published March 2014.Originallyapproved in 2009.Last previous edition approved in 2009 as D7471 09.DOI:10.1520/D7471-09R14.2For 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.3See the ASTM Form and Style Manual,available from ASTM Headquarters.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 5.2 The material described in this specification shall be freeof foreign matter to such a contamination level as shall beagreed upon between the purchaser and the seller.6.Performance Requirements6.1 The average test result of the lot shall conform to therequirements prescribed in Table 1 when tested by the proce-dures specified herein.Table 1 lists those tests of specificgravity and tensile properties requiring a specimen molded asdescribed in Section 8.7.Sampling7.1 The materials shall be sampled in accordance with anadequate statistical sampling program.8.Specimen Preparation8.1 Prepare a molded sheet 1.5 6 0.3 mm(0.06 6 0.01 in.)thick.Use a picture-frame-type chase having a suitableblanked-out section and thickness to produce the desired sheet.Use clean aluminum foil,0.13 to 0.18 mm(0.005 to 0.007 in.)thick,in contact with the resin.