1、Designation: D 1710 02Standard Specification forExtruded and Compression Molded Polytetrafluoroethylene(PTFE) Rod and Heavy Walled Tubing1This standard is issued under the fixed designation D 1710; the number immediately following the designation indicates the year oforiginal adoption or, in the cas
2、e of revision, 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.This standard has been approved for use by agencies of the Department of Defense.1. Scope*1.1 This spe
3、cification covers polytetrafluoroethylene(PTFE) rod and heavy-walled tubing manufactured from thePTFE resin of Specification D 4894 and reprocessed PTFEresin (as defined in Guide D 5033).1.2 The specification covers rod 200-mm (8-in.) nominaldiameter or under and heavy-walled tubing 100-mm outsidedi
4、ameter and with a wall thickness of 1.6 mm (116 in.) orgreater. These materials must be made wholly from PTFE andproduced in accordance with good commercial practice.NOTE 1Although this specification and ISO/DIS 13000-1 (1997) andISO/DIS 13000-2 (1997) differ in approach or detail, data obtained usi
5、ngeither are technically equivalent.1.3 The values stated in SI units, as detailed in IEEE/ASTMSI 10 are to be regarded as the standard. The inch-pound unitsgiven in parentheses are provided for information only.1.4 The following precautionary caveat pertains to the testmethods portion, Section 12,
6、only 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 t
7、o use.2. Referenced Documents2.1 ASTM Standards:D 149 Test Method for Dielectric Breakdown Voltage andDielectric Strength of Electrical Insulating Materials atCommercial Power Frequencies2D 150 Test Methods for A-C Loss Characteristics andPermittivity (Dielectric Constant) of Solid Electrical Insu-l
8、ation2D 256 Test Methods for Determining the Izod PendulumImpact Resistance of Plastics3D 257 Test Methods for D-C Resistance or Conductance ofInsulating Materials2D 374 Test Methods for Thickness of Solid Electrical Insu-lation2D 618 Practice for Conditioning Plastics for Testing3D 621 Test Methods
9、 for Deformation of Plastics UnderLoad4D 638 Test Method for Tensile Properties of Plastics3D 696 Test Method for Coefficient of Linear Thermal Ex-pansion of Plastics Between 30 and 30C with a VitreousSilica Dilatometer3D 790 Test Methods for Flexural Properties of Unreinforcedand Reinforced Plastic
10、s and Electrical Insulating Materi-als3D 792 Test Methods for Density and Specific Gravity (Rela-tive Density) of Plastics by Displacement3D 883 Terminology Relating to Plastics3D 1505 Test Method for Density of Plastics by the Density-Gradient Technique3D 1600 Terminology for Abbreviated Terms Rela
11、ting toPlastics3D 2240 Test Method for Rubber Property-Durometer Hard-ness5D 3295 Specification for PTFE Tubing, Miniature Beadingand Spiral Cut Tubing6D 3892 Practice for Packaging/Packing of Plastics6D 4591 Test Method for Determining Temperatures andHeats of Transitions of Fluoropolymers by Diffe
12、rentialScanning Calorimetry7D 4894 Specification for Polytetrafluoroethylene (PTFE)Granular Molding and Ram Extrusion Materials7D 4895 Specification for Polytetrafluoroethylene (PTFE)Resins Produced from Dispersion7D 5033 Guide for Development of ASTM Standards Relat-ing to Recycling and Use of Recy
13、cled Plastics7D 5740 Guide for Writing Material Standards in the Clas-sification D 4000 Format71This 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 10, 2002. Pub
14、lished May 2002. Originallypublished as D 1710 60T. Last previous edition D 1710 99.2Annual Book of ASTM Standards, Vol 10.01.3Annual Book of ASTM Standards, Vol 08.01.4Discontinued; see 1994 Annual Book of ASTM Standards , Vol 08.01.5Annual Book of ASTM Standards, Vol 09.01.6Annual Book of ASTM Sta
15、ndards, Vol 08.02.7Annual Book of ASTM Standards, Vol 08.03.1*A Summary of Changes section appears at the end of this standard.Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.E94 Guide for Radiographic Examination8F 36 Test Method for
16、 Compressibility and Recovery ofGasket Materials9IEEE/ASTM SI 10 Standard for the Use of the InternationalSystem of Units (SI): The Modern Metric System102.2 ISO Standards:11ISO 13000-1 (1997) PlasticsPolytetrafluoroethylene(PTFE) Semi-Finished Products, Part 1: Basis for Speci-ficationISO 13000-2 (
17、1997) PlasticsPolytetrafluoroethylene(PTFE) Semi-Finished Products, Part 2: Preparation ofTest Specimen and Determination of Properties3. Terminology3.1 DefinitionsDefinitions are in accordance with Termi-nology D 883 unless otherwise specified.3.1.1 lot, none production run or a uniform blend of tw
18、oor more production runs. (D 4895)3.2 AbbreviationsAbbreviations are in accordance withTerminology D 1600. PTFE is the acronym for polytetrafluo-roethylene.4. Classification4.1 This specification covers three types of PTFE-fluorocarbon rod and heavy-walled tubing. They are as fol-lows:4.1.1 Type I,
19、PremiumA type of rod or heavy-walledtubing having maximum physical and electrical properties tomeet rigid requirements.4.1.2 Type II, General PurposeA type of rod or heavy-walled tubing having properties required of general electrical,mechanical, and chemical applications.4.1.3 Type IIIA type of rod
20、 or heavy-walled tubing fornoncritical chemical, electrical, and mechanical applications.4.2 A one-line system may be used to specify materialscovered by this specification. The system uses predefined cellsto refer to specific aspects of this specification, illustrated asfollows:SpecificationStandar
21、d Number Type Grade Class SpecialBlock notesExample: Specification D 171002 1 1 A4.2.1 For this example, the line callout would be Specifica-tion D 171002, 11 A, and would specify that a rod orheavy-walled tubing has all of the properties listed for thattype, grade, and class. A comma is used as the
22、 separatorbetween the standard number and the type. Separators are notneeded between the type, grade, and class. A provision forspecial notes is included so that other information can beprovided when required. An example would be to specify thedimension tolerances for each size of rod or heavy-walle
23、dtubing. When special notes are used, they should be precededby a comma.4.3 The types are further subdivided into two grades:4.3.1 Grade 1Made only from virgin resin.4.3.2 Grade 2Made using reprocessed resin.4.4 The grades are further subdivided into four classes:4.4.1 Class ARod or heavy-walled tub
24、ing having normaldimensional stability.4.4.2 Class BRod or heavy-walled tubing meeting thedimensional stability requirements of Table 1.4.4.3 Class CSame as Class A, but, in addition, com-pletely examined for internal defects.4.4.4 Class DSame as Class B, but, in addition, com-pletely examined for i
25、nternal defects.5. Materials and Manufacture5.1 The rod or heavy-walled tubing from Types I, II, and IIIshall be made from unpigmented PTFE as free of foreignmatter as commercially practical.6. General Requirements General Requirements6.1 The rod covered by this specification shall meet themechanica
26、l and electrical requirements specified in Table 1 and6.1.1 when tested by the methods given in Section 12. Theheavy-walled tubing covered by this specification shall meetthe mechanical and electrical requirements in Table 2 and 6.1.1when tested by the methods given in Section 12.6.1.1 Melting Point
27、The melting point of all types of rodand heavy walled tubing shall be 327 6 10C when tested inaccordance with 12.7.8Annual Book of ASTM Standards, Vol 03.03.9Annual Book of ASTM Standards, Vol 09.02.10Available from ASTM International, 100 Barr Harbor Drive, West Consho-hocken, PA 19428.11Available
28、from American National Standards Institute, 25 W. 43rd St., 4thFloor, New York, NY 10036.TABLE 1 Detail Requirements of Extruded RodPropertiesType I Type II Type IIIRod Diameter, in.ARod Diameter, in.ARod Diameter, in.Aunder1212 to112over112under1212 to112over112under1212 to112over112Specific gravit
29、y, min 2.14 2.15 2.15 2.12 2.13 2.14 2.12 2.13 2.14Tensile strength, min, MPa 13.8 14.5 15.2 11.7 12.4 13.1 9.7 10.3 11.0(psi) (2000) (2100) (2200) (1700) (1800) (1900) (1400) (1500) (1600)Elongation at Break, min,% 150 175 200 100 125 150 50 75 75Dielectric strength, min, V/mil 700 750 800 600 650
30、700 250 250 250Dimensional stability,Bmax, %Length 1.5 1.5 . 1.5 1.5 . 3.0 3.0 .Diameter 0.5 0.5 . 0.5 0.5 . 1.0 1.0 .A1 in. = 25.4 mm.BThis requirement applies only to rod of Classes B and D that is under 25.4 mm (1 in.) in diameter.D17100227. Dimensions, Mass, and Permissible Variations7.1 The dim
31、ensions and tolerances of heavy-walled tubingshall be in accordance with Table 3. Measurements shall bemade in accordance with Method A of Test Methods D 374.7.2 For rod and heavy-walled tubing, it may be necessary tocenter-less-grind the outside diameter for rod and heavy-walledtubing to meet the t
32、olerances given in Table 3.7.2.1 EccentricityThe eccentricity of the heavy-walledtubing, when measured as one half of the difference betweenthe maximum and minimum wall thickness at either end of thetube, shall not exceed 10 % of the nominal wall thickness.Nominal wall thickness is one half the diff
33、erence between thenominal outside diameter and the nominal inside diameter.8. Workmanship, Finish and Appearance8.1 ColorType I shall be white to translucent but mayhave occasional spots. Types II and III typically are white butmay vary to light gray or light brown. For Types II and IIIoccasional sm
34、all gray, brown, or black spots shall not beconsidered cause for rejection.8.2 FinishThe rod or heavy-walled tubing shall be freefrom surface blisters, cracks, wrinkles, and other surfacedefects that might impair it for general use.8.3 Internal DefectsClasses C and D shall be free of allmacroscopic
35、voids, cracks, and foreign inclusions, or thelocation of such defects shall be clearly marked or identified.The examination for internal defects shall be made in accor-dance with Guide E94.9. Sampling9.1 Sampling shall be statistically adequate to satisfy therequirements of 13.4.10. Number of Tests
36、and Retests10.1 The tests listed in Table 1 and Table 2, as they apply,are sufficient to establish conformity of the PTFE rod orheavy-walled tubing to this specification. When the number oftest specimens is not stated in the test method, single determi-nation may be made. If more than single determi
37、nations onseparate portions of the same sample are made, the results shallbe averaged. The single or average result shall conform to therequirements prescribed in this specification.TABLE 2 Properties of PTFE Heavy-Walled TubingGradeType I Type II Type IIIGrade1Grade2Grade1Grade2Grade1Grade2Specific
38、 Gravity, min 2.15 2.14 2.15 2.14 2.14 2.13Tensile Strength, min, MPA 13.8 10.4 12.4 9.7 11.0 9.0(psi) (2000) (1500) (1800) (1400) (1600) (1300)Elongation at break, min, % 150 140 130 120 100 80Dielectric Strength, min1 mm (0.040 in.) kV/mm 29.5 27.5 25.6 23.6 12 10Short Time (V/mil) (750) (700) (65
39、0) (600) (325) (250)Dimensional Stabilitymax, Classes B and D, %Length 1.5 1.5 2.0 2.0 2.5 2.5Diameter 0.5 0.5 0.75 0.75 1.0 1.0TABLE 3 Diameter and Tolerances for PTFE Rod andHeavy-Walled TubingNominal Inside orOutsideDiameter,Amm (in.)Tolerance,Bmm (in.)1.6 (116) 0.13(0.005)3.2 (18) 0.18(0.007)4.8
40、 (316) 0.23(0.009)6.3 (14) 0.30(0.012)9.5 (38) 0.30(0.012)12.7 (12) 0.36(0.014)15.8 (58) 0.41(0.016)19.1 (34) 0.43(0.017)25.4 (1) 0.51(0.020)31.8 (114) 0.64(0.025)38.1 (112) 0.76(0.030)44.4 (134) 0.89(0.035)50.8 (2) 0.89(0.035)57.2 (214) 1.02(0.040)63.5 (212) 1.14(0.045)76.2 (3) 1.14(0.045)101.6 (4)
41、 1.14(0.045)203.2 (8) 1.14(0.045)AIntermediate diameters shall conform to the tolerances of the next largerdiameter in the table.BThe tolerance is plus for outside diameters and minus for inside diameters.D171002311. Test Conditions11.1 Conditioning of SpecimensThe test specimens shallbe conditioned
42、 in accordance with Procedure A of PracticeD 618 for a period of at least 4 h prior to test.11.2 Standard TemperatureThe tests shall be conducted atthe standard laboratory temperature of 23 6 1C (73.4 61.8F). Since the rod or heavy-walled tubing does not absorbwater, the maintenance of constant humi
43、dity during testing isnot important.12. Test Methods12.1 Visual InspectionVisually inspect each of thesamples of PTFE rod or heavy-walled tubing selected inaccordance with Section 9 to verify its compliance with therequirements of this specification. Occasional superficial flawsin PTFE rod or heavy-
44、walled tubing should be interpreted asnot affecting the physical and electrical properties; however, ifthere is an appearance of a transverse discontinuity or “pokerchip,” testing for tensile strength and elongation is imperative.12.2 Specific GravityDetermine the specific gravity of therod or heavy
45、-walled tubing in accordance with Method A ofTest Methods D 792. Two drops of wetting agent should beadded to the water in order to reduce the surface tension andensure complete wetting of the specimens. Test two specimensrepresentative of the cross section of the rod or heavy-walledtubing and avera
46、ge the results.12.2.1 The gradient tube method of Test Method D 1505may be used as an alternate on three specimens.12.3 Tensile Strength and Elongation:12.3.1 Determine the tensile strength and elongation of rodsless than 38.1 mm (112 in.) in diameter in accordance withTest Method D 638 modified as
47、described below. Determinethe tensile strength and elongation of rods 38.1 mm or more indiameter in accordance with Specification D 4894 modified asdescribed below. Prepare the microtensile specimens from1.59-mm (116-in.) thick wafers cut from a representativeportion of the rod in a plane 90 to the
48、axis. Coincide the centerof the microtensile specimen with the axis of the rod. Test fivespecimens and average the results.12.3.1.1 For rods with diameters less than 38.1 mm (112in.), prepare the test specimens in accordance with Fig. 1.12.3.1.2 For rods with diameters 38.1 mm (112 in.) or over,prep
49、are the test specimens in accordance with Fig. 2 ofSpecification D 4894.12.3.1.3 Test at a speed of 50.8 mm (2 in.)/min.12.3.1.4 For rods with diameters less than 38.1 mm (112in.), the elongation measure between gage marks 50.8 mm (2in.) apart.12.3.1.5 For rods with diameters of 38.1 mm (112 in.) ormore, measure the elongation using an initial jaw separation of22.22 mm (0.875 in.).12.3.1.6 Rods of 6.35 mm (14 in.) and smaller may be testedin full cross-section.12.3.2 For the tensile strength and elongation of heavy-wall
