1、Designation:D496799(Reapproved 2013)Standard Guide forSelecting Materials to Be Used for Insulation,Jacketing andStrength Components in Fiber-Optic Cables1This standard is issued under the fixed designation D4967;the number immediately following the designation indicates the year oforiginal adoption
2、 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.Scope1.1 This guide is intended to provide a list of materialscommonly used in components th
3、at provide insulation,jacket-ing and strength in fiber-optic cables.Where these materials arecovered byASTM standards,an appropriate reference is made.Due to changing technology,not all materials being used arenecessarily listed here.1.2 This guide does not include materials used in compo-nents for
4、optical purposes(optical fiber and its coating)orexternal metallic armoring(such as for a barrier to rodents).1.3 This guide offers two general lists of materials:1.3.1 A subdivision of fiber-optic cable construction intocomponents that are used for insulation,jacketing,or strength,with a generic ma
5、terial classification for specific applicationsin each component(see Section 5);and1.3.2 Analphabeticallistofthegenericmaterialclassifications,showing ASTM standards where they exist(seeTable 1).2.Referenced Documents2.1 ASTM Standards:2D1248 Specification for Polyethylene Plastics ExtrusionMaterial
6、s for Wire and CableD1457 Specification for Polytetrafluoroethylene(Ptfe)Molding and Extrusion Materials(Withdrawn 1996)3D1711 Terminology Relating to Electrical InsulationD2116 Specification for FEP-Fluorocarbon Molding andExtrusion MaterialsD2287 Specification for Nonrigid Vinyl Chloride Polymeran
7、d Copolymer Molding and Extrusion CompoundsD2526 Specification for Ozone-Resisting Silicone RubberInsulation for Wire and Cable(Withdrawn 2006)3D3159 Specification for Modified ETFE-FluoropolymerMolding and Extrusion MaterialsD3222 Specification for Unmodified Poly(Vinylidene Fluo-ride)(PVDF)Molding
8、 Extrusion and Coating MaterialsD3275 Classification System for E-CTFE-FluoroplasticMolding,Extrusion,and Coating MaterialsD3307 SpecificationforPerfluoroalkoxy(PFA)-Fluorocarbon Resin Molding and Extrusion MaterialsD3317 Specification for High Modulus,Organix Yarn andRoving(Withdrawn 1985)3D3664 Sp
9、ecification for Biaxially Oriented Polymeric ResinFilm for Capacitors in Electrical EquipmentD3935 Specification for Polycarbonate(PC)Unfilled andReinforced MaterialD4066 Classification System for Nylon Injection and Extru-sion Materials(PA)D4101 Specification for Polypropylene Injection and Extru-s
10、ion MaterialsD4246 Specification for Ozone-Resistant ThermoplasticElastomer Insulation For Wire and Cable,90 C OperationD4507 Specification for Thermoplastic Polyester(TPES)Materials(Withdrawn 1999)3D4730 Specification for Flooding Compounds for Telecom-munications Wire and CableD4731 Specification
11、for Hot-Application Filling Com-pounds for Telecommunications Wire and CableD4732 Specification for Cool-Application Filling Com-pounds for Telecommunications Wire and Cable3.Terminology3.1 DefinitionsFor definitions of terms used in this guide,refer to Terminology D1711.3.2 Definitions of Terms Spe
12、cific to This Standard:3.2.1 buffer,na material that is applied over an opticalfibers protective coating to further protect the fiber fromphysical damage and provide mechanical protection.3.2.2 composite buffer,npolymeric material(s)surround-ing the optical fiber so that the inner layer is in intima
13、te contactwith the fiber cladding or coating with a tightly extruded buffermaterial overall.1This guide is under the jurisdiction ofASTM Committee D09 on Electrical andElectronic Insulating Materials and is the direct responsibility of SubcommitteeD09.18 on Solid Insulations,Non-Metallic Shieldings
14、and Coverings for Electricaland Telecommunication Wires and Cables.Current edition approved Nov.1,2013.Published December 2013.Originallyapproved in 1989.Last previous edition approved in 2009 as D4967 99(2009).DOI:10.1520/D4967-99R13.2For referenced ASTM standards,visit the ASTM website,www.astm.or
15、g,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.3The last approved version of this historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Dr
16、ive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.2.3 loose tube(s),na buffer material that surrounds theoptical fiber(s)so that it forms a tube or channel whose insidedimension is greater than the fibers outside diameter(orcombined diameters).3.2.3.1 DiscussionWhen required,the space between thefiber(s)and the inside of the tube may be filled with a suitablefilling compound or with strength or cushioning elements,orboth.3.2.4 slotted core,nan element(s)with helical groovesassembl
