BS_3691-1990.pdf

BS3691:1990Committees responsible for thisBritish StandardThe preparation of this British Standard was entrusted by the PlasticsStandards Policy Committee(PLM/-)to Technical Committee PLM/39,uponwhich the following bodies were represented:BEAMA Ltd.British Marine Industries FederationBritish Plastics FederationBritish Telecommunications plcERA Technology Ltd.Electrical and Electronic Insulation Association(BEAMA Ltd.)Engineering Equipment and Materials UsersAssociationMinistry of DefenceProcess Plant AssociationRoyal Institute of British ArchitectsSociety of British Aerospace Companies Ltd.Society of Motor Manufacturers and Traders Ltd.Standards Association of Australia(British Committees)The following body was also represented in the drafting of the standard,through subcommittees and panels:Imperial College of Science and TechnologyThis British Standard,havingbeen prepared under thedirection of the PlasticsStandards Policy Committee.年was published under theauthority of the Board ofBSI and comesinto effect on28 February 1990CBSI02.1999First published December 1963Amendments issued since publicationFirst revision March 1969Second revisionAmd.No.Date of issueCommentsThe following BSI referencesrelate to the work on thisstandard:Committee reference PLM/39Draft for comment 85/41727 DCISBN0580177904BS3691:19901 Scope2.9盈texThis British Standard specifies requirements forE glass fibre rovings intended for the reinforcementthe mass in grams per kilometre length of rovingof polyester and epoxy resin systems,includingRvinyl and bisphenyl polyesters.3 DesignationNOTE The titles of the publications referred to in this standardNOTE 1 This clause is in accordance with ISO 2078are listed on the inside back cover.Rovings shall be designated by a code that consists2 Definitionsof the following elements in the order given:a)the letterE,to describe the glass compositionFor the purposes of this British Standard thetype used by the manufacturer;following definitions apply.b)the letter“C”,to describe the use of“continuous2.1fibre;coupling agentc)a whole number of one or two digits to describea substance that promotes or establishes a strongerthe filament diameter in micrometresbond at the interface of the resin matrix and the(see Table 1);20:00reinforcementd)either of the following as appropriate:2.21)for direct roving,a number to describe thedirect rovingLN5total roving linear density(in tex);orroving obtained by winding a large and determined2)for indirect roving,a number to describe thenumber of filaments directly from a bushinglinear density of the individual strands that2.3compose the roving(in tex);QE glasse)for indirect roving only,a multiplication signa glass containing not more than 1%by mass of“x”;8alkali(calculated as Na2 O)and used for thef)for indirect roving only,the number of strandsmanufacture of glass fibresassembled without intentional twist:AON2.4g)the number and date of this British Standard.filamenti.e.BS3691:1990.paMa single textile element of a small diameter and aExample 1.An E glass roving manufactured usingvery long length,considered as continuouscontinuous fibre directly from strands of measured罗2.5mean filament diameter 17 um to a linear densityindirect rovingof 2 400 tex is designated“EC172400:BS3691:1990”a collection of parallel strands assembled withoutExample 2.An E glass roving manufactured usingintentional twistcontinuous fibre and manufactured indirectly byNOTE This is sometimes referred to as an assembled bining 44 individual rovings each of linear2.6density 55 tex and of strand of measured meanunplelmean filament diameterfilament diameter 12 um is designatedthe average diameter of 100 filaments,determined“EC125544:BS3691:1990”年in accordance with Appendix BNOTE 2 For ordering purposes the designation should befollowed by the following elements:2.7a)the type of roving,i.e.normal or selected;sizeb)details of the type(s)of resin system(s)withmaterial applied to glass fibres or filaments duringwhich the roving is required to be compatible;the course of their manufacturec)the type and size of package and dimensions ofNOTE The size may contain a coupling agent.the supporting cardboard tube required,if any2.8strandan assembly of parallel filaments simultaneouslyproduced and slightly bonded.without intentionaltwistoBSI02.1999