1、Designation: D 7472 09Standard Specification forEFEP-Fluoropolymer Molding and Extrusion Materials1This standard is issued under the fixed designation D 7472; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revision, the year of last revisio
2、n. 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 isa copolymer of e
3、thylene, 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 for information o
4、nly.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 sa
5、fety 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 Standards:2D 150 Test M
6、ethods for AC Loss Characteristics and Per-mittivity (Dielectric Constant) of Solid Electrical Insula-tionD 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 Dis
7、placementD 883 Terminology Relating to PlasticsD 1238 Test Method for Melt Flow Rates of Thermoplasticsby Extrusion PlastometerD 1600 Terminology for Abbreviated Terms Relating toPlasticsD 3418 Test Method for Transition Temperatures and En-thalpies of Fusion and Crystallization of Polymers byDiffer
8、ential Scanning CalorimetryD 3892 Practice for Packaging/Packing of PlasticsE 177 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 Dispersions
9、andMoulding and Extrusion MaterialsPart 1ISO 12086-2 PlasticsFluoropolymer Dispersions andMoulding and Extrusion MaterialsPart 23. Terminology3.1 GeneralThe terminology given in Terminology D 883is applicable to this specification.3.2 Definitions:3.3 lot, none production run or a uniform blend of tw
10、o ormore production runs.3.4 GeneralThe abbreviated terms given in TerminologyD 1600 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 divided
11、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 : G
12、rade : SpecialBlock : : : Notes: :,:Example: Specification D 7472 - 09, I2For this example, the line callout shall be, SpecificationD 7472 09, I2 and shall specify a fluoropolymer that has allof the properties listed for that type and grade in the appropri-ate specified properties, or tables, or bot
13、h, in the specification1This specification is under the jurisdiction of ASTM Committee D20 onPlastics and is the direct responsibility of Subcommittee D20.15 on ThermoplasticMaterials.Current edition approved June 1, 2009. Published June 2009.2For referenced ASTM standards, visit the ASTM website, w
14、ww.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 St.,4th Floor, New York, NY 10036, http:/www.
15、ansi.org.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.identified. A comma is used as the separator between thestandard number and the type. Separators are not neededbetween the type and grade.45. General Requirements5.1 The materi
16、al 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 a contamination level as shall beagreed upon between the purchaser and the seller.6. Performance Requirem
17、ents6.1 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 specimen molded as described in Section 8.7. Sampling7.1 The materials shall be sampled in accordance with anad
18、equate 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
19、, 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 (0.040 in.) thick and have an area adequate to cover thechase.8.2 Lay down and smoothly cover one plate with a
20、 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 a mound in the middle of the chase. Place a secondsheet of aluminum foil on top of the granules and add t
21、he 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 assembly. Hold for 2 to 4 min without pressure. Applyapproximately 1 MPa (145 psi) and hold for 1 to 1.5 min. Th
22、enapply 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 6 0.25-in.) steel plates whose tempera-ture is less than 40C (104F).8.4 When the sheet is cool enough to
23、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 of specific gravity and tensile properties,condition the molded test specimens in accordance withProcedur
24、e A of Practice D 618 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 determination of specific gravityand tensile properties only. Since this resin does not absorbwater, the maint
25、enance 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 PackagingThe material shall be packaged in stan-dard commercial containers so constructed as to ensure accep-tance
26、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 material, type, grade, and quantity therein.10.3 All packing, packaging, and marking provisions ofPractic
27、e D 3892 shall apply to this specification.11. Test Methods11.1 Melt Flow Rate:11.1.1 Principle of Test MethodThe melt flow rate shallbe determined at 265 6 1C using Procedure A or B describedin Test Method D 1238. The extrusion plastometer to be usedis described in Test Method D 1238 modified by us
28、e ofcorrosion resistant alloy for the barrel lining, orifice, piston tip,and orifice securing device. Use pellets or pieces of approxi-mately the same size cut from molded or extruded forms. Strips4See the ASTM Form and Style Manual, available from ASTM Headquarters.TABLE 1 Specific Gravity, Melting
29、 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 190max: 170 170 200Flow rate, g/10 min,min: 25.0 3.0 20.0max: 50.0 8.0 30.0TABLE 2 Detail Requirements for Molded Test Specimens for AllResins in This Specificati
30、onType I IIGrade 1 2 1Tensile strength, min, psi: 5800 4300 4300Elongation, min, %: 370 370 370Dielectric constant,103Hz, max: 2.6 2.6 2.6106Hz, max: 2.6 2.6 2.6Dissipation factor,103Hz, max: 0.001 0.001 0.001106Hz, max: 0.01 0.01 0.01D7472092about 6 mm (14 in.) by 76 mm (3 in.) long also load readi
31、ly intothe barrel. Refer to Table 2 or Table 3 of Test Method D 1238for the amount of charge which shall be adjusted accordinglywith melt density of EFEP being used. Usually the chargeamount is 5 to 15 g. Flow rate shall be measured using a loadof 5000 g. Collect five successive cuts for the manual
32、method.11.1.2 Precision and BiasPrecision and bias for this testmethod are to be determined by round-robin testing.11.2 Specific Gravity Determine the specific gravity of aspecimen approximately 25 by 38 mm (1 by 1.5 in.) blanked orcut from the molded plaque (see Section 8) in accordance withthe pro
33、cedures described in Test Methods D 792. Add twodrops of a wetting agent to the water in order to reduce thesurface tension and ensure complete wetting of the specimen.11.3 Melting Point:11.3.1 Melting Characteristics by Thermal AnalysisUsedifferential scanning calorimetry (DSC) as described in Test
34、Method D 3418 for this determination. For specification pur-poses, the test shall be run on a 10 6 2-mg specimen cut froma pellet of the resin as sold or received. The heating rate shallbe run at 10 6 1C (18 6 1.8F)/min to 265C (509F). Twopeaks during the initial melting test are observed occasional
35、ly.In this case, the peak temperatures shall be reported as Tlforthe lower temperature and Tufor the upper temperature. Thepeak temperature of the peak largest in height shall be reportedas the melting point if a single value is required. If a peaktemperature is difficult to discern from the curves,
36、 that is, if thepeak 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 be taken as the peak temperature.11.4 Tensile Properties:11.4.1 Cut five specimens with the m
37、icrotensile die shownin Figure 1 of Test Method D 1708. 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 with the procedures described in Test Method D 638except that the specimens used shall be as d
38、etailed 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 jaw. Determine the elongation from the chart, expressingit as a percentage of the initial j
39、aw separation.11.5 Dielectric Constant and Dissipation FactorDetermine dielectric constant and dissipation factor in accor-dance with Test Methods D 150. Testing shall be done at 103Hz and 106Hz.12. Number of Tests12.1 One set of test specimens as prescribed in Section 11shall be considered sufficie
40、nt 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 suppliedwith reference to this specification shall be for conformance tothe requirements specif
41、ied 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-check inspection with reference to a specifi-cation shall consist of the tests for all require
42、ments 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 by a process in statistical control, sampled, tested and thatthe average values for the lot
43、 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 inspectionfor the shipment.14. Keywords14.1 copolymer of ethylene, tetrafluoroethylene, an
44、dhexafluoropropylene; EFEP copolymer; ETFE copolymer; eth-ylene copolymer; ethylene-tetrafluoroethylene copolymer;fluoropolymer; tetrafluoroethylene copolymer; TFE copolymerASTM International takes no position respecting the validity of any patent rights asserted in connection with any item mentione
45、din 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.This standard is subject to revision at any time by the responsible technical committee and
46、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 International Headquarters. Your comments will receive careful consideration at a meeting of
47、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 below.This standard is copyrighted by ASTM International, 100 Barr Harbor Drive, PO Box C
48、700, 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).D7472093
