1、Designation: D3004 08 (Reapproved 2013)Standard Specification forCrosslinked and Thermoplastic Extruded Semi-Conducting,Conductor and Insulation Shielding Materials1This standard is issued under the fixed designation D3004; the number immediately following the designation indicates the year oforigin
2、al adoption or, in the case of revision, the year 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. Scope*1.1 This specification covers crosslinked and thermoplasticextruded
3、semi-conducting, conductor and insulation shieldingmaterials for electrical wires and cables.1.2 The values stated in SI units are to be regarded asstandard. No other units of measurement are included in thisstandard.1.3 In many instances, the electrical properties of theshielding material are stron
4、gly dependent on processing con-ditions. For this reason, in this specification the material issampled from cable. Therefore, tests are done on shielded wirein this standard solely to determine the relevant property of theshielding material and not to test the conductor or completedcable.2. Referenc
5、ed Documents2.1 ASTM Standards:2D257 Test Methods for DC Resistance or Conductance ofInsulating MaterialsD1711 Terminology Relating to Electrical InsulationD2647 Specification for Crosslinkable Ethylene PlasticsD3182 Practice for RubberMaterials, Equipment, and Pro-cedures for Mixing Standard Compou
6、nds and PreparingStandard Vulcanized SheetsD3183 Practice for RubberPreparation of Pieces for TestPurposes from ProductsD4496 Test Method for D-C Resistance or Conductance ofModerately Conductive MaterialsD4703 Practice for Compression Molding ThermoplasticMaterials into Test Specimens, Plaques, or
7、SheetsD6095 Test Method for Longitudinal Measurement of Vol-ume Resistivity for Extruded Crosslinked and Thermo-plastic Semiconducting Conductor and Insulation Shield-ing Materials3. Terminology3.1 Definitions: For definitions of terms used in thisspecification, refer to Terminology D1711.3.2 Defini
8、tions 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 longitudinal volume resistivity, nan electrical resis-tance multiplied by a factor calculated from the geometry of aspecimen volume between electrodes in contact w
9、ith one, andonly one, surface of the specimen.3.2.2.1 DiscussionIn normal wire and cable usage, thelongitudinal volume resistivity is simply referred to as “volumeresistivity.” This usage is at variance with terminology in TestMethods D257, Terminology D1711, and Test Method D4496.3.2.3 semi-conduct
10、ing, adjmoderately conductive; seeTerminology D1711 and Test Method D4496.4. Physical Properties4.1 The shielding material, when processed into moldedslabs, in accordance with Procedure C in the Annex of PracticeD4703, the Sampling Section of Specification D2647, andPractices D3182 and D3183, depend
11、ing on the type of materialbeing tested, shall conform to the requirements for physicalproperties specified in Table 1.5. Electrical Requirements5.1 Logitudinal Volume ResistivityWhen the extrudedconductor and insulation shielding is sampled and tested inaccordance with Test Method D6095, the volume
12、 resistivity atthe rated temperature of the insulation shall be not greater than100 000 cm for conductor shielding and 50 000 cm forinsulation shielding.6. Sampling6.1 Sample the semi-conducting materials in accordancewith 4.1.7. Test Methods7.1 Test the semi-conducting materials in accordance with4
13、.1 and Test Method D6095.1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D09.07 on Electrical Insulating Materials.Current edition approved Nov. 1, 2013. Published December 2013. Orig
14、inallyapproved in 1971. Last previous edition approved in 2008 as D3004 08. DOI:10.1520/D3004-08R13.2For referenced 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 Do
15、cument Summary page onthe ASTM website.*A Summary of Changes section appears at the end of this standardCopyright ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States18. Keywords8.1 conductor shielding material; insulation shielding mate-rial; semic
16、on; semi-conducting shielding material; volumeresistivitySUMMARY OF CHANGESCommittee D09 has identified the location of selected changes to this specification since the last issue,D3004 02, that may impact the use of this specification. (Approved May 1, 2008)(1) Revised the document throughout, incl
17、uding the title.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 validity of any such patent rights, and the riskof infringement of
18、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 comments are invited either for revision of this standard or for ad
19、ditional 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 have not received a fair hearing you shouldmake your views known to
20、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 t
21、he 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 Copyright Clearance Center, 222Rosewood Drive, Danvers, MA 01923, Tel: (978) 646-2600; http:/ 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 1C. Crosslinked materials, aged168hat1211C.D3004 08 (2013)2
