1、Designation: D7472 09 (Reapproved 2014)Standard Specification forEFEP-Fluoropolymer Molding and Extrusion Materials1This standard is issued under the fixed designation D7472; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year
2、 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 This specification covers melt processible molding andextrusion materials of EFEP-fluoropolymer. The EFEP resin is
3、a copolymer of ethylene, tetrafluoroethylene, and hexafluoro-propylene.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 f
4、or 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 establis
5、h appropriate safety and healthpractices and determine the applicability of regulatory limita-tions prior to use.NOTE 1Although this specification and ISO 12086-1 andISO 12086-2 differ in approach or detail, data obtained using either aretechnically equivalent.2. Referenced Documents2.1 ASTM Standar
6、ds:2D150 Test Methods for AC Loss Characteristics and Permit-tivity (Dielectric Constant) of Solid Electrical InsulationD618 Practice for Conditioning Plastics for TestingD638 Test Method for Tensile Properties of PlasticsD792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plas
7、tics 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
8、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 System2.2 ISO Standards:3ISO 12086-1 PlasticsFluoropolymer Disper
9、sions andMoulding and Extrusion MaterialsPart 1ISO 12086-2 PlasticsFluoropolymer Dispersions andMoulding and Extrusion MaterialsPart 23. 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
10、of two ormore production runs.3.4 GeneralThe abbreviated terms given in TerminologyD1600 are applicable to this specification.4. Classification4.1 This specification covers two types of fluoropolymersupplied in pellet form classified according to their meltingpoints. The resins of each type are divi
11、ded into one to twogrades in accordance with 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
12、 : Grade : SpecialBlock : : : Notes: :,:Example: Specification D7472 - 09, I2For this example, the line callout shall be, SpecificationD7472 09, I2 and shall specify a fluoropolymer that has all ofthe properties listed for that type and grade in the appropriate1This specification is under the jurisd
13、iction 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 D7472 09. DOI:10.1520/D7472-09R14.2For referen
14、ced 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.3Available from American National Standards Institute (ANSI), 25 W. 43rd
15、St.,4th Floor, New York, NY 10036, http:/www.ansi.org.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States1specified properties, or tables, or both, in the specificationidentified. A comma is used as the separator between thestandard numbe
16、r and the type. Separators are not neededbetween the type and grade.45. General Requirements5.1 The material shall be of uniform composition and soprepared as to conform to the requirements of this specifica-tion.5.2 The material described in this specification shall be freeof foreign matter to such
17、 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 Tables 1 and 2 when tested by theprocedures specified herein. Table 2 lists those tests requiringa speci
18、men molded as described 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
19、 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. Spraying a high-temperaturemold release agent on the aluminum foil will help prevent thefoil from sticking to the sheet. Use steel molding plates at least1.0 mm (0.0
20、40 in.) thick and have an area adequate to cover thechase.8.2 Lay down and smoothly cover one plate with a sheet ofaluminum foil. Place the mold chase on top of this assembly.Place within the mold chase sufficient molding material toproduce the required sheet in such manner that the polymercharge is
21、 a mound in the middle of the chase. Place a secondsheet of aluminum foil on top of the granules and add the topmold plate. Place the assembly in a compression molding presshaving platens that have been heated to 265 6 5C (509 69F).8.3 Bring the press platens to incipient contact with themold assemb
22、ly. Hold for 2 to 4 min without pressure. Applyapproximately 1 MPa (145 psi) and hold for 1 to 1.5 min. Thenapply 2 to 4 MPa (290 to 580 psi) and hold for 1 to 1.5 min.Maintain the press at 265 6 5C (509 6 9F) during thesesteps. Remove the assembly from the press and place betweentwo 20 6 7-mm (0.75
23、 6 0.25-in.) steel plates whose tempera-ture is less than 40C (104F).8.4 When the sheet is cool enough to touch about 50 to 60C(122 to 140F), remove aluminum foil from the sheet. (If thesheet is allowed to cool to room temperature, the aluminum foilcannot be pulled free.)9. Conditioning9.1 For tests
24、 of specific gravity and tensile properties,condition the molded test specimens in accordance withProcedure A of Practice D618 for a period of at least 4 h priorto test. The other tests require no conditioning.9.2 Conduct tests at the standard laboratory temperature of23 6 2C (73.4 6 3.6F) for deter
25、mination of specific gravityand tensile properties only. Since this resin does not absorbwater, the maintenance of constant humidity during testing isnot necessary. Conduct tests for melt flow rate and meltingpoint under ordinary laboratory conditions.10. Packaging and Package Marking10.1 PackagingT
26、he material shall be packaged in stan-dard commercial containers so constructed as to ensure accep-tance by common or other carriers for safe transportation to thepoint of delivery unless otherwise specified in the contract ororder.10.2 MarkingShipping containers shall be marked withthe name of the
27、material, type, grade, and quantity therein.10.3 All packing, packaging, and marking provisions ofPractice D3892 shall apply to this specification.11. Test Methods11.1 Melt Flow Rate:11.1.1 Principle of Test MethodThe melt flow rate shall bedetermined at 265 6 1C using Procedure A or B described inT
28、est Method D1238. The extrusion plastometer to be used is4See the ASTM Form and Style Manual, available from ASTM Headquarters.TABLE 1 Specific Gravity, Melting Point, and Flow RateRequirementsType I IIGrade 1 2 1Specific gravity,min: 1.71 1.71 1.71max: 1.77 1.77 1.77Melting point, C,min: 155 155 19
29、0max: 170 170 200Flow rate, g/10min,min: 25.0 3.0 20.0max: 50.0 8.0 30.0TABLE 2 Detail Requirements for Molded Test Specimens for AllResins in This SpecificationType I IIGrade 1 2 1Tensile strength,min, psi:5800 4300 4300Elongation, min,%:370 370 370Dielectricconstant,103Hz, max: 2.6 2.6 2.6106Hz, m
30、ax: 2.6 2.6 2.6Dissipationfactor,103Hz, max: 0.001 0.001 0.001106Hz, max: 0.01 0.01 0.01D7472 09 (2014)2described in Test Method D1238 modified by use of corrosionresistant alloy for the barrel lining, orifice, piston tip, andorifice securing device. Use pellets or pieces of approximatelythe same si
31、ze cut from molded or extruded forms. Strips about6mm(14 in.) by 76 mm (3 in.) long also load readily into thebarrel. Refer to Table 2 or Table 3 of Test Method D1238 forthe amount of charge which shall be adjusted accordingly withmelt density of EFEP being used. Usually the charge amount is5 to 15
32、g. Flow rate shall be measured using a load of 5000 g.Collect five successive cuts for the manual method.11.1.2 Precision and BiasPrecision and bias for this testmethod are to be determined by round-robin testing.11.2 Specific GravityDetermine the specific gravity of aspecimen approximately 25 by 38
33、 mm (1 by 1.5 in.) blanked orcut from the molded plaque (see Section 8) in accordance withthe procedures described in Test Methods D792.Add two dropsof a wetting agent to the water in order to reduce the surfacetension and ensure complete wetting of the specimen.11.3 Melting Point:11.3.1 Melting Cha
34、racteristics by Thermal AnalysisUsedifferential scanning calorimetry (DSC) as described in TestMethod D3418 for this determination. For specificationpurposes, the test shall be run on a 10 6 2-mg specimen cutfrom a pellet of the resin as sold or received. The heating rateshall be run at 10 6 1C (18
35、6 1.8F)/min to 265C (509F).Two peaks during the initial melting test are observed occa-sionally. In this case, the peak temperatures shall be reported asTlfor the lower temperature and Tufor the upper temperature.The peak temperature of the peak largest in height shall bereported as the melting poin
36、t if a single value is required. If apeak temperature is difficult to discern from the curves, that is,if the peak is rounded rather than pointed, straight lines shall bedrawn tangent to the sides of the peak. The temperaturecorresponding to the point where these lines intersect beyondthe peak shall
37、 be taken as the peak temperature.11.4 Tensile Properties:11.4.1 Cut five specimens with the microtensile die shownin Figure 1 of Test Method D1708. The die shall be of thesteel-rule or solid metal type of curvature of 5 60.5-mm (0.26 0.02-in.) type. Determine the tensile properties in accor-dance w
38、ith the procedures described in Test Method D638except that the specimens used shall be as detailed above, theinitial jaw separation shall be 22.2 6 0.13 mm (0.875 6 0.005in.), and the speed of testing shall be 50 6 5 mm/min (2 6 0.2in./min). Clamp the specimens with essentially equal lengths ineach
39、 jaw. Determine the elongation from the chart, expressingit as a percentage of the initial jaw separation.11.5 Dielectric Constant and Dissipation FactorDetermine dielectric constant and dissipation factor in accor-dance with Test Methods D150. Testing shall be done at 103Hzand 106Hz.12. Number of T
40、ests12.1 One set of test specimens as prescribed in Section 11shall be considered sufficient for testing each sample. Theaverage result of the samples tested shall conform to therequirements of this specification.13. Certification and Inspection13.1 Inspection and certification of the material suppl
41、iedwith reference to this specification shall be for conformance tothe requirements specified herein.13.2 Lot-acceptance inspection shall be the basis on whichacceptance or rejection of the lot is made. The lot-acceptanceinspection shall consist of melt flow rate and melting point.13.3 Periodic-chec
42、k inspection with reference to a specifi-cation shall consist of the tests for all requirements of thematerial under the specification. Inspection frequency shall beadequate to ensure the material is certifiable in accordance with13.4.13.4 Certification shall be that the material was manufac-tured b
43、y a process in statistical control, sampled, tested and thatthe average values for the lot meet the requirements of thespecification.13.5 ReportsWhen specified in the purchase order orcontract, a report of the test results shall be furnished. Thereport shall consist of results of the lot-acceptance
44、inspectionfor the shipment.14. Keywords14.1 copolymer of ethylene, tetrafluoroethylene, andhexafluoropropylene ; EFEP copolymer; ETFE copolymer;ethylene copolymer; ethylene-tetrafluoroethylene copolymer;fluoropolymer; tetrafluoroethylene copolymer; TFE copolymerASTM International takes no position r
45、especting 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 infringement of such rights, are entirely their own responsibility.Thi
46、s 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 or for additional standardsand should be addressed to ASTM Inte
47、rnational 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 known to the ASTM Committee on Standards, at the address shown
48、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). Permission rights to photocopy the standard may also be secured from the ASTM website (www.astm.org/COPYRIGHT/).D7472 09 (2014)3
