1、Designation: D 6040 06Standard Guide toStandard Test Methods for UnsinteredPolytetrafluoroethylene (PTFE) Extruded Film or Tape1This standard is issued under the fixed designation D 6040; the number immediately following the designation indicates the year oforiginal adoption or, in the case of revis
2、ion, 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.1. Scope*1.1 This guide identifies test methods to use in evaluatingunsintered extruded films or tapes manufactu
3、red from polytet-rafluoroethylene.1.2 The values stated in SI units as detailed in IEEE/ASTMSI 10, are to be regarded as standard.1.3 This standard does not purport to address all of thesafety concerns, if any, associated with its use. It is theresponsibility of the user of this standard to establis
4、h appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.NOTE 1This test method is equivalent to ISO 12086-2:2006 in themeasurement of tensile properties, specific gravity, and dielectric constant.These are in ISO 12086-2:2006, sections 8.2.2
5、, 10.6 and 8.1.1. It is notequivalent to ISO 12086-2:2006 in any other measurement or section2. Referenced Documents2.1 ASTM Standards:2D 149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Solid Electrical Insulating Materialsat Commercial Power FrequenciesD 150 Test Methods
6、for AC Loss Characteristics and Per-mittivity (Dielectric Constant) of Solid Electrical Insula-tionD 257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD 374 Test Methods for Thickness of Solid Electrical Insu-lationD 792 Test Methods for Density and Specific Gravity (Rela-tive
7、Density) of Plastics by DisplacementD 882 Test Method for Tensile Properties of Thin PlasticSheetingD 883 Terminology Relating to PlasticsD 1711 Terminology Relating to Electrical InsulationD 2288 Test Method for Weight Loss of Plasticizers onHeatingD 3776 Test Method for Mass Per Unit Area (Weight)
8、 ofFabricF 335 Terminology Relating to Electrostatic ImagingF 412 Terminology Relating to Plastic Piping SystemsIEEE/ASTM SI 10 Standard for Use of the InternationalSystem of Units (SI): The Modern Metric System32.2 ISO Standard:ISO 12086-2:2006 PlasticsFluoropolymer Dispersionsand Moulding and Extr
9、usion MaterialsPart 2: Prepara-tion of Test Specimens and Determination of Properties43. Terminology3.1 Definitions: Definitions are in accordance with TestMethods D 257 and Terminologies D 883 and D 1711, unlessotherwise specified.3.1.1 apparent density, nthe weight per unit volume of amaterial inc
10、luding voids inherent in the material as tested, seeTerminology F 412.3.1.2 lot, none production run, or uniform blend of two ormore production runs.3.2 Definitions of Terms Specific to This Standard:3.2.1 film, nfull-width material received as finished film.3.2.2 tape, nmaterial that has been slit
11、from the finishedfilm.3.2.3 volume resistivity, nthe volume resistance (in ohm-centimetres) between opposite faces of a material where thevalues are obtained by the measure of resistance to electricalcurrent between electrodes placed in contact with the opposingsurfaces of the sample (see Terminolog
12、y F 335).4. Test Specimens4.1 The number of test specimens shall be in accordancewith the requirements of the individual test methods.1This guide is under the jurisdiction of ASTM Committee D20 on Plastics andis the direct responsibility of Subcommittee D20.15 on Thermoplastic Materials.Current edit
13、ion approved April 1, 2006. Published April 2006. Originallyapproved in 1996. Last previous edition approved in 2001 as D 6040 - 01.2For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at serviceastm.org. For Annual Book of ASTMStandards volume inform
14、ation, refer to the standards Document Summary page onthe ASTM website.3Available from ASTM Headquarters, 100 Barr Harbor Drive, West Consho-hocken, PA 19428.4Available from American National Standards Institute (ANSI), 25 W. 43rd St.,4th Floor, New York, NY 10036.1*A Summary of Changes section appe
15、ars at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.5. Conditioning5.1 Condition the tape for 4 h and conduct tests at thestandard laboratory temperature of 23 6 2C 73.4 6 3.6F,unless otherwise specified in
16、 the test methods or required in aspecification. Since the tape or film does not absorb water, themaintenance of constant humidity during testing is not impor-tant.6. Width6.1 Determine width measurements using a steel scalehaving divisions at a minimum of 0.5-mm 164-in. intervals.6.2 Test at least
17、one specimen from each lot.6.3 Each test specimen shall be approximately 450 mm 18in. in length. Place the specimens on a hard smooth surface.Measure the width perpendicular to the edge of the steel scale,at three approximately equally spaced points along the length.6.4 Report the average width in m
18、illimetres or inches plusthe maximum and minimum values if they are required by aspecification.7. Thickness7.1 Measure thickness of the tape and film in accordancewith Test Methods D 374. Test Method D shall be the preferredmethod. The force on the foot shall not exceed 300 g. TestMethod B shall not
19、 be used as the film is compressible, andthere is no restraint on how much compression is used.7.2 Report:7.2.1 Report the average thickness to the nearest 0.0025 mm0.0001 in. plus the maximum and minimum, if specified.7.2.2 Report the test method from Test Methods D 374 ifother than Test Method D i
20、s used.8. Tensile Properties8.1 Determine tensile strength and elongation in accordancewith Test Methods D 882. Calculate tensile strength andpercentage elongation from the values at the maximum load.NOTE 2Unsintered PTFE does not exhibit a clean break as is normalfor most thin plastic sheeting.8.2
21、Randomly select five specimens per lot and test.8.3 Report:8.3.1 Report the average tensile strength and the minimumand maximum values in megapascals (MPa) (pound-force persquare inch (psi).8.3.2 Report the average percentage elongation at maximumload and the minimum and maximum values.9. Specific G
22、ravity (Relative Density)9.1 Determine specific gravity in accordance with TestMethod A of Test Methods D 792. Other equipment shown togive comparable results may be used.NOTE 3Test Methods D 792 can be used due to the inability of waterto penetrate the film or tape.NOTE 4Especially useful for this
23、test, has been the electronic den-simeter, Model ED-120 T.5NOTE 5A volume method (apparent density) may be used providingthat the testing error is held to less than one third of the total allowablevariance. Calculate the density as follows:D 5 Wg/V (1)where:D = apparent density of the specimen, g/cm
24、3,Wg= weight of specimen, g, andV = volume of specimen, cm3.9.2 Test one specimen for each lot.10. Residual Extrusion Aids or Other VolatileComponents10.1 Determine the percentage of volatile material in accor-dance with Test Method D 2288 except that the test tempera-ture shall be 260 6 5C 500 6 10
25、F, and test for 1 h.10.2 Test one specimen for each lot.11. Dielectric Constant11.1 This test method covers the determination of relativepermittivity of electrical insulating materials and should beperformed in accordance with Test Methods D 150 using amicroelectrode system at a frequency of 1 MHz.N
26、OTE 6The results are offered as proof of consistency of lot to lot ofmaterial that usually is to be processed further. The processing may resultin significant change in the dielectric constant. The test results, therefore,are used primarily to ensure product uniformity of the film or tape asreceived
27、.11.2 Test one specimen per lot.12. Volume Resistivity12.1 Perform the test in accordance with Test MethodsD 257.NOTE 7The results are offered as proof of consistency of lot to lot ofmaterial that usually is to be processed further. The processing may resultin significant change in the dielectric co
28、nstant. The test results, therefore,are used primarily to ensure product uniformity of the film or tape asreceived.12.2 Randomly select one specimen per lot and test.13. Dielectric Breakdown Voltage13.1 Determine the dielectric breakdown voltage in accor-dance with Test Method A, Short Time Test of
29、Test MethodsD 149.13.2 Randomly select five specimens per lot and test.13.3 The voltage rate of rise shall be 500 V/s.13.4 Perform the test in air at standard laboratory conditionsunless otherwise specified.13.5 Use Type 3 electrodes as described in Table 1 of TestMethod D 149 shall be used.13.6 Giv
30、e special attention to the hazards listed in TestMethods D 149.NOTE 8Dielectric breakdown voltage may not be applicable to sometapes due to width constraints.14. Unit Weight14.1 Determine unit weight in accordance with Test Meth-ods D 3776.5The sole source of supply of the apparatus known to the com
31、mittee at this timeis Testing Machines, Inc., 400 Bayview Avenue, Amityville, NY 11701. If you areaware of alternative suppliers, please provide this information to ASTM Interna-tional Headquarters. Your comments will receive careful consideration at a meetingof the responsible technical committee,1
32、which you may attend.D604006214.2 Randomly select one specimen per lot and test.15. Keywords15.1 dielectric breakdown voltage; dielectric constant; elon-gation; lubricated PTFE; paste extruded PTFE; PTFE; specificgravity; tensile properties; unsintered PTFE; virgin; volatiles;volume resistivitySUMMA
33、RY OF CHANGESCommittee D20 has identified the location of selected changes to this standard since the last issue,D 6040 - 01, that may impact the use of this standard. (April 1, 2006)(1) Removed reference to Test Method A in 8.1.(2) Corrected title of Section 9.(3) Revised 9.1 to reflect the change
34、made in the title ofSection 9.(4) Added “apparent density” to verbiage in Note 5.ASTM International takes no position respecting 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 va
35、lidity 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 must be reviewed every five years andif not revised, either reapproved or withdrawn. Your co
36、mments 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 theresponsible technical committee, which you may attend. If you feel that your comments hav
37、e 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 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).D6040063
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