1、Designation: D 3004 02An American National StandardStandard Specification forExtruded Crosslinked and Thermoplastic Semi-Conducting,Conductor and Insulation Shielding Materials1This standard is issued under the fixed designation D 3004; the number immediately following the designation indicates the
2、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 (e) indicates an editorial change since the last revision or reapproval.1. Scope1.1 This specification covers extruded crosslinked and
3、ther-moplastic semi-conducting, conductor and insulation shieldingmaterials for electrical wires and cables.1.2 The materials covered are not compatible with hydro-carbon derivatives of a swelling or deteriorating nature.1.3 Whenever two sets of values are presented, in differentunits, the values in
4、 the first set are the standard, while those inparentheses are for information only.1.4 In many instances, the electrical properties of theshielding material are strongly dependent on processing con-ditions. For this reason, in this specification the material issampled from cable. Therefore, tests a
5、re done on shielded wirein this standard solely to determine the relevant property of theshielding material and not to test the conductor or completedcable.2. Referenced Documents2.1 ASTM Standards:D 1711 Terminology Relating to Electrical Insulation2D 1928 Practice for Preparation of Compression-Mo
6、ldedPolyethylene Test Sheets and Test Specimens3D 2647 Specification for Crosslinkable Ethylene Plastics4D 3182 Practice for RubberMaterials, Equipment, andProcedures for Mixing Standard Compounds and Prepar-ing Standard Vulcanized Sheets5D 3183 Practice for RubberPreparation of Pieces for TestPurpo
7、ses from Products5D 4496 Test Method for DC Resistance or Conductance ofModerately Conductive Materials6D 6095 Test Method for Volume Resistivity for ExtrudedCrosslinked and Thermoplastic Semi-Conducting, Con-ductor and Insulation Shielding Materials63. Terminology3.1 Definitions: For definitions of
8、 terms used in this speci-fication, refer to Terminology D 1711.3.2 Definitions of Terms Specific to This Standard:3.2.1 aging (act of), nthe exposure of materials to anenvironment for an interval of time.3.2.2 semi-conducting, adjmoderately conductive; seeTerminology D 1711 and Test Method D 4496.4
9、. Physical Properties4.1 The shielding material, when processed into moldedslabs, in accordance with Practice D 1928 Procedure C, theSampling Section of Specification D 2647, and PracticesD 3182 and D 3183, depending on the type of material beingtested, shall conform to the requirements for physical
10、 proper-ties specified in Table 1.5. Electrical Requirements5.1 Volume ResistivityWhen the extruded conductor andinsulation shielding is sampled and tested in accordance withTest Method D 6095, the volume resistivity at the ratedtemperature of the insulation shall be not greater than 100 000Vcm for
11、conductor shielding and 50 000 Vcm for insulationshielding.6. Sampling6.1 Sample the semi-conducting materials in accordancewith 4.1.7. Test Methods7.1 Test the semi-conducting materials in accordance with4.1 and Test Method D 6095.8. Keywords8.1 conductor shielding material; insulation shielding ma
12、te-rial; semi-conducting shielding material; volume resistivity1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.18 on Solid Insulations, Non-Metallic Shieldings, and Cover-ings for
13、 Electrical and Telecommunication Wires and Cables.Current edition approved March 10, 2002. Published June 2002. Originallypublished at D 3004 71. Last previous edition D 3004 97.2Annual Book of ASTM Standards, Vol 10.01.3Discontinued; see 2001 Annual Book of ASTM Standards, Vol 08.03.4Annual Book o
14、f ASTM Standards, Vol 08.02.5Annual Book of ASTM Standards, Vol 09.01.6Annual Book of ASTM Standards, Vol 10.02.1Copyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.ASTM International takes no position respecting the validity of any paten
15、t 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.This standard is subject to revision a
16、t 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 International Headquarters. Your commen
17、ts 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 below.This standard is copyrighted
18、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-mai
19、l); or through the ASTM website(www.astm.org).TABLE 1 Physical Properties for Semi-conducting ShieldingMaterialsBrittle point (Test Method A) 10C, maxAging requirements:AElongation at rupture, min, % 100AThermoplastic materials, aged 48 h at 100 6 1C. Crosslinked materials, aged168 h at 121 6 1C.D3004022
