1、Designation:D 4244 95(Reapproved 2001)An American National StandardStandard Specification forGeneral-Purpose,Heavy-Duty,and Extra-Heavy-DutyAcrylonitrile-Butadiene/Poly(Vinyl Chloride)(NBR/PVC)Jackets for Wire and Cable1This standard is issued under the fixed designation D 4244;the number immediatel
2、y following the designation indicates the 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 specificati
3、on covers durable,crosslinked black orcolored acrylonitrile-butadiene/poly(vinyl chloride)(NBR/PVC)compounds suitable for use as outer coverings or jacketson electrical cables for general-purpose,heavy-duty,and extra-heavy-duty service.1.2 General-purpose and heavy-duty jackets are not recom-mended
4、for installation at a temperature lower than 25C andextra-heavy-duty jackets at a temperature lower than 10C.1.3 Compounds are based on a fluxed blend of anacrylonitrile-butadiene synthetic rubber and poly(vinyl chlo-ride)resin.1.4 The values stated in inch-pound units are the standard,except in cas
5、es where SI units are more appropriate.The valuesgiven in parentheses are for information only.2.Referenced Documents2.1 ASTM Standards:D 470 Test Methods for Crosslinked Insulations and Jacketsfor Wire and Cable2D 1499Practice for Filtered Open-Flame Carbon-Arc Ex-posures of Plastics3G 23 Practice
6、for Operating Light-Exposure Apparatus(Carbon-Arc Type)With and Without Water for Exposureof Nonmetallic Materials43.Test Applicable for Black Sunlight and WeatherResistant Materials3.1 A black jacket shall retain a minimum of 80%of itsunexposed tensile strength and elongation after 720 h ofexposure
7、 in a dual carbon-arc apparatus.Prepare the specimensin accordance with Test Methods D 470 for physical tests ofinsulations and jackets.Perform the test in accordance withPractice D 1499 using Method 1 of Practice G 23.This test isnot applicable to colored jackets.4.Physical Properties4.1 Jackets sh
8、all conform to the requirements for physicalproperties prescribed in Table 1.5.Sampling5.1 Unless otherwise specified,sample the jacket in accor-dance with Test Methods D 470.6.Test Methods6.1 Unless otherwise specified,test the jacket in accordancewith Test Methods D 470.7.Keywords7.1 acrylonitrile
9、-butadiene/poly(vinyl chloride)jacket;crosslinked jacket;extra-heavy-duty jacket;general-purposejacket;heavy-duty jacket;rubber jacket1This specification is under the jurisdiction of ASTM Committee D09 onElectrical and Electronic Insulating Materials and is the direct responsibility ofSubcommittee D
10、09.18 on Solid Insulations,Non-Metallic Shieldings and Coveringsfor Electrical and Telecommunication Wires and Cables.Current edition approved Feb.15,1995.Published April 1995.Originallypublished as D 4244 83.Last previous edition D 4244 89.2Annual Book of ASTM Standards,Vol 10.01.3Annual Book of AS
11、TM Standards,Vol 08.01.4Discontinued;see 1996 Annual Book of ASTM Standards,Vol 14.02.1Copyright 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 patent rights asserted in connection
12、 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 at any time by the responsible tech
13、nical 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 comments will receive careful consideration
14、 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 by ASTM International,100 Barr Harbor Dr
15、ive,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).TABLE 1
16、 Physical PropertiesAPhysical PropertyGeneral-PurposeHeavy-DutyExtra-Heavy-DutyUnexposed(Unaged)Requirements:Tensile strength,min,psi(MPa)1500(10.3)1800(12.4)2400(16.5)Tensile stress at 200%elongation,min,psi(MPa).500(3.4)700(4.8)Elongation at rupture,min,%250300300Tension setB,max,%303030Tear,min lbf/in.(kN/m).40(7)Exposed(Aged)Requirements:After air-oven test at 100 6 1C for 168 h:Tensile strength,min,%of unexposed(unaged)value505050Elongation at rupture,min,%of unexposed(unaged)value505050Aft
