贝卡钢帘线结构.doc

。Steel CordPackingSpoolsTyre cord is wound on metal spoolsNOTEThe arrow on the flange indicates the direction for unwinding the spool.BS40BS60BS80/17BS80/33CartonsThe tyre cord spools are packed in a waterproof cartonstrapped to a pallet in units of approximately 1300 kg netmass. The pallet is made of wood or plastic.DIMENSIONS:length: 1080 mmwidth: 810 mmheight: 1200 mmHANDSAMPLESCarefully packed handsamples oftyre cord can be attached to thecorresponding unit.STORAGE CONDITIONSAll units are provided withdesiccant and a humidity indicator.Cartons can be stored for sixmonths inside a warehouse wherethe combination of temperatureand humidity does not lead tocondensation. It is recommendedto condition the units at ambienttemperature before they areopened.ORDERING PROCEDUREInquiries or orders of tyre cord must specify: tyre cord construction type of coating type of spool total quantityRETURN OF PACKINGAll packing materials are to be returned to the Bekaert plant of origin.100 empty BS40 spools per box60 empty BS80 spools per boxPlastic seperators must be returned in a different boxSteel CordDefinitionCord componentsFILAMENT OR WIRE (1)A metal fibre used as an individual element in a strand or cord. Standard filament diameters are 0.15/0.175/0.20/0.22/0.25/0.27/0.28/0.30/0.35 and 0.38 mm.STRAND (2)A group of filaments combined together to form a unit product for further processing.CORD (3)A formed structure composed of two or more filaments when used as an end product, or a combination of strands or filaments and strands.WRAP (4)A filament wound helicallyaround a steel cord. Physical propertiesDIAMETER OF CORDThe diameter is determined by calculating the arithmetic average of the measured maximum and minimum thickness of the cord. The diameter is expressed in millimetres.LENGTH OF LAY (1)The axial distance required to make a 360 degree revolution of any element in a strand or in a cord and expressed in millimetres. The recommended lengths of lay are based on the ISO recommendation R-388-R20 series, ranging from 2.50 mm to 25.00 mm.DIRECTION OF LAY(2)The helical disposition of the components of a strand or cord. The strand or cord has an S or left-hand lay if, when held vertically, the spirals around the central axis of the strand or cord conform in direction of slope to the central portion of the letter S; and Z or right-hand lay if the spirals conform in direction of slope to the central portion of the letter Z.LINEAR DENSITYThe mass per unit length expressed in grams per metre.ARC HEIGHT(1)The amount of bending of a cord sample lying on a flat surface against two supports with an interdistance of 300 mm.RESIDUAL TORSIONSThe number of revolutions made by a specific length of cord when one end is held in a fixed position and the other allowed to turn freely,expressed in turns per 6 metres.FLARE(2)The spreading of the filament ends or the strand ends at the cut end of a cord, expressed as the unravelled length in millimetres.Mechanical propertiesBREAKING FORCEThe maximum force or load expressed in Newtons, which a test specimen can support during a tensile test of loading to break.TENSILE STRENGTHThe breaking load of a filament per unit of unstrained cross-sectional area expressed in Newtons per square millimetre or Megapascals.ELONGATION AT BREAK (or breaking elongation)The increase in length of a test specimen, which results from subjecting it to the breaking force in a tensile test, expressed as a percentage of the initial length of the specimen measured under a definedpre-tension.ELONGATION BETWEEN DEFINED FORCES (EDF)(1)The increase in length of a test specimen, which results from subjecting it to a defined force from a defined pre-tension onward. The elongation is expressed as a percentage of the initial length of the specimen.ELASTICITYThe property of a material by virtue of which it tends torecover its original size and shape after removal of a deforming force.Chemical propertiesMASS OF COATINGThe quantity of the covering layer applied to the surface of the wire, expressed in grams per kilogram of coated wire.THICKNESS OF COATINGThe average thickness of the coating layer expressed in micrometers.COMPOSITION OF COATINGThe quantity of each of the components expressed as a percentage of the total massof the coating. Adhesion propertiesADHESION STRENGTHThe force required to separate a steel tyre cord from the rubber compound.The force is expressed in Newton.Steel CordNomenclature systemA tyre cord construction isnormally defined by the structure (or configuration) of the cord the length and direction of lay the product typeStructureRULEThe description of the construction follows the sequence of manufacture of the cord i.e. starting with the innermost strand or wire and moving outwards.FORMATThe full description of the cord is given by the following formula: (NxF)xD+(NxF)xD+(NxF)xDwhereN = number of strandsF = number of filamentsD = nominal diameter of filaments, expressed in mmExamples:(1x3)x0.22+(1x9)x0.22+(1x15)x0.22+(1x1)x0.15ABBREVIATED FORM When N or F equals 1, they should not be included.Example:3x0.22+9x0.22+15x0.22+0.15 If the diameter D is the same for two or more parts in sequence, it must only be stated at the end of the sequence. The diameter of the spiral wrap shall always be stated separately.Example:3+9+15x0.22+0.15 When the innermost strand or wire is identical to the adjacent strand or wires, the formula may be simplified by stating only the sum of the identical components and brackets need not be used.Example:0.22+6x0.22+6x(0.22+6x0.22) becomes 7x7x0.22Length of lay and direction of layRULEThe sequence or order in the designation follows the sequence of manufacturing i.e. starting with the innermost strand and moving outwards.Example: 3+9+15x0.175+0.155/10/16/3.5 SSZS5 S:lay length and direction of the strand 3x0.17510 S:lay length and direction of the layer +9x0.17516Z:lay length and direction of the layer +15x0.1753.5 S:lay length and direction and direction of the wrapProduct typesREGULAR CORD (1)Cord in which the direction of lay in the strands is opposite to the direction of lay inclosing the cord.LANGS LAY CORD (LL) (2)Cord in which the direction of lay in the strands is the same as the direction of lay inclosing the cord.OPEN CORD (OC) (3)A cord in which wires are loosely associated and movable relative to each other to enable rubber to penetrate into the cord.COMPACT CORD (CC) (4)A cord in which the filaments mainly have linear contact with each other.HIGH ELONGATION CORD (HE) (5)Langs lay cord in which the strands are loosely associated and movable relative to each other, to allow the cord to be stretched substantially at a given load.BETRU CORD (6)a cord with gaps between the filaments. The gaps allow the rubber to penetrate the cord and thus to block any moisture conduit. The BETRU filaments are formed so to have a polygonal curve instead of a circular curve as perpendicular projection.HIGH IMPACT CORD (7)a protection layer cord of which the filaments are preformed thus that the cord has full rubber penetration. This avoids corrosion and enables to have excellent retreadability. The cord has a high impact absorption capability, as it has 5% elongation even when rubber embedded.Steel CordGeneral CharacteristicsRaw material: wire rodTo manufacture tyre cord Bekaert uses the most suitable grades of high carbon steel according to the ultimate cord type. Wire rod feedstock is systematically rated for its quality level and performance.Average steel composition:Normal tensileCarbon0.725%Manganese0.525%Silicon0.230%Sulphur0.010%Phosphorus0.010%Traces of copper, chromium and nickel.High tensileCarbon0.825%Manganese0.525%Silicon0.210%Sulphur0.006%Phosphorus0.008%Traces of copper, chromium and nickel.Welds and splicesContinuous lengths are supplied which means that:a. filament splices are permittedb. cord welds are permitted and should withstand a minimum load equal to 40% of the breaking load of the cord. The increase in diameter of the finished weld should not exceed the cord diameter by more than 15%c. number of cord welds will not exceed 3 per spool type BS40 or BS604 per spool type BS80Tolerance on individual value Cord diameter: 5% Linear density: 5% Length of cord per spool: 0.75 % if cord length 2000 m 0.50% if cord length 2000 m and 8000 m 0.25 % if cord length 8000 m 0.75 % for HE cord types.Coating definition The conversion from mass of coating expressed in g/kg to thickness of coating expressed in micrometers is done according to the following formulaThickness = Mass x d x 0.235 whered = diameter of filament in mmHE窗体顶端Steel CordConstructionTypePreferred use(guideline) Lay Length(mm) LayDirection (Target)CordDiameter(mm) (Target)BreakingLoad(N)(Target)LinearDensity(g/m) MinimumAchievablePlyStrength*(Target)(N/dm)MaximumAchievablePlyStrength*(Target)(N/dm)SpoolCordLength (m on BS40) 3x4x0.20HETBR3/6SS1.048353.24325655761551604x4x0.22HETBR3.5/5SS1.3212205.40427007076031503x7x0.20HETBR3.5/6.3SS1.3714001.80490007840028004x4x0.225HETBR4.3/7.5SS1.3615805.41553009006030003x7x0.22HETBR4.5/8SS1.5218206.9560060946402400窗体底端* minimum ply strength is achieved with intercord distance of 1.5 mm * maximum ply strength is achieved with intercord distance of 0.4 mm窗体顶端Steel CordConstructionTypePreferred use(guideline) Lay Length(mm) LayDirection (Target)CordDiameter(mm) (Target)BreakingLoad(N)(Target)LinearDensity(g/m) MinimumAchievablePlyStrength*(Target)(N/dm)MaximumAchievablePlyStrength*(Target)(N/dm)SpoolCordLength (m on BS40) 5x0.30 High ImpactHILTR/SUV12.5S1.069452.82368556426043505x0.38 High ImpactHITBR14S1.3412804.63448007296035005x0.35 High ImpactHITBR14S1.1912203.8945140768603250窗体底端* minimum ply strength is achieved with intercord distance of 1.5 mm * maximum ply strength is achieved with intercord distance of 0.4 mm窗体顶端Steel CordConstructionTypePreferred use(guideline) Lay Length(mm) LayDirection (Target)CordDiameter(mm) (Target)BreakingLoad(N)(Target)LinearDensity(g/m) MinimumAchievablePlyStrength*(Target)(N/dm)MaximumAchievablePlyStrength*(Target)(N/dm)SpoolCordLength (m on BS40) 2x0.30HTPCR14S0.604451.122136044500163002+2x0.25HTPCRoo/14/14-SS0.656051.552843557475125002+1x0.30HTPCRoo/16-S0.756651.682926057855100003x0.30 HT BetruHTPCR16S0.656601.683102062700130005x0.25 BetruHTPCR11S0.687501.943450069750105002+2x0.30HTPCRoo/16/16-SS0.788902.23391607565081252+2x0.32HTLTR/SUVoo/16/16-SS0.839452.57406357654570005x0.30 BetruHTLTR/SUV16S0.8110502.80451508715073002+2x0.35HTLTR/SUVoo/16/16-SS0.9410603.03434607950060002+7x0.22HTLTR/SUV6.3/12.5SS0.8310702.74460108667072005x0.35 Betru HTLTR/SUV17S0.9414153.835801510612555003x0.20/9x0.175+0.15 CCHTTBR10/5SZ1.0210202.65408007140060003x0.22/9x0.20+0.15 CCHTTBR12.5/5SZ1.1112703.33482608382050003+9x0.22+0.15HTTBR6.3/12.5/3.5SSZ1.1714503.85536509280040003x0.22/9x0.20 CCHTTBR12.5S0.8812703.33533409906070003+9x0.25+0.15HTTBR7/14.5/5SSZ1.3117904.896444010382035005x0.38 Betru HTTBR18S1.0316604.516640011620046000.20+18x0.175 CCHTTBR10Z0.9015253.736405011742560003x0.20+6x0.35HTTBR10/18SZ1.1319905.347562012935035000.22+6+12x0.20HTTBR6.3/12.5ZZ1.0218804.867520013160047004+6x0.35 Betru HTTBR20S1.4925507.598415013515022000.365+6x0.35 BetruHTTBR18S1.0819955.427780513566036000.22+18x0.20 CCHTTBR12.5Z1.0219454.847780013615047004+6x0.38 BetruHTTBR22S1.5829508.959440015045018500.25+6+12x0.225HTTBR8/16ZZ1.0923206.169048015544040007x7x0.25+1HTOTR12.5/20/5SZS2.52670019.801675002278008007x(3+9x0.245)+0.20HTOTR6.3/12.5/28/5ZZSSZS3.301075033.072257502902504507x(3+9+15x0.175)+0.20HTOTR5/10/16/38/5SSSZZZSZ3.601240037.502480003100003757x(3+9+15x0.245)+0.245HTOTR6.3/12.5/18/55/5ZZZSZ4.842420073.90387200459800195窗体底端l minimum ply strength is achieved with intercord distance of 1.5 mm * maximum ply strength is achieved with intercord distance of 0.4 mm窗体顶端Steel CordConstructionTypePreferred use(guideline) Lay Length(mm) LayDirection (Target)CordDiameter(mm) (Target)BreakingLoad(N)(Target)LinearDensity(g/m) MinimumAchievablePlyStrength*(Target)(N/dm)MaximumAchievablePlyStrength*(Target)(N/dm)SpoolCordLength (m on BS40) 2+1x0.30NTPCRoo/16-S0.755301.682332046110100002+2x0.25NTPCRoo/14/14-SS0.655301.552491050350125003x0.30 NT BetruNTPCR16S0.655401.682538051300130002+7x0.22NTLTR/SUV6.3/12.5SS0.839602.74412807776072002+7x0.22+0.15NTLTR/SUV6.3/12.5/5SSZ1.089602.90374406528052003x0.20/9x0.175 CCNTLTR/SUV10S0.758752.49385007612585003x0.22/9x0.20+0.15 CCNTTBR12.5/5SZ1.1110953.33416107227050003+9x0.22+0.15NTTBR6.3/12.5/3.5SSZ1.1712903.85477308256040002+7x0.28+0.15NTTBR8/16/3.5SSZ1.3314404.64504008352032500.20+18x0.175 CCNTTBR12.5Z0.9013003.715460010010060003+9+15x0.175+0.15NTTBR5/10/16/3.5SSZS1.3417705.426195010089031003x0.20+6x0.35NTTBR10/18SZ1.1316605.346308010790035000.365+6x0.35 NT BetruNTTBR18S1.0816505.426435011220036000.22+18x0.20 CCNTTBR12.5Z1.0216554.846620011585047000.25+18x0.22 CCNTTBR16Z1.1320505.857790013325040003+9+15x0.22+0.15NTTBR6.3/12.5/18/3.5SSZS1.6227508.508800013750020003+9x0.22+9x3x0.20+015NTOTR6.3/12.5/10/20/35SSSZS1.98340010.79986001428003+9+9x3x0.25+0.15NTOTR7/14/12.5/22/5SSSZS2.42480015.711248001680009007x7x0.22+1NTOTR12.5/20/5SZS2.24490015.2013230018620011007x7x0.30NTOTR12.5/20SZ2.70795028.60190800254400625窗体底端l minimum ply strength is achieved with intercord distance of 1.5 mm * maximum ply strength is achieved with intercord distance of 0.4 mm窗体顶端Steel CordConstructionTypePreferred use(guideline) Lay Length(mm) LayDirection (Target)CordDiameter(mm) (Target)BreakingLoad(N)(Target)LinearDensity(g/m) MinimumAchievablePlyStrength*(Target)(N/dm)MaximumAchievablePlyStrength*(Target)(N/dm)SpoolCordLength (m on BS40) 5x0.22 BetruSTPCR9.5S0.606351.513048063500136004x0.35 ST BetruSTLTR/SUV18S0.8512363.05531489888069750.20+18x0.175STTBR10Z0.9016103.736762012397060000.22+18x0.20STTBR12.5Z1.0220954.84838001466504700窗体底端l minimum ply strength is achieved with intercord distance of 1.5 mm * maximum ply strength is achieved with intercord distance of 0.4 mm Steel CordTesting and processingSamplingSamples are taken of each shipment according to a frequency derived from the Military Standards 414 for variables.TestsAll specified tests are conducted according to the corresponding Bekaert test procedure. Principles follow hereafter.DIAMETER OF CORD(1)A specimen of cord is held between two parallel circular faced anvils of a micrometer. The movable anvils close gradually in order to measure the thickness of the cord without crushing or flatteningLENGTH OF LAYA specimen of cord or strand is untwisted until the elements to be determined are parallel. The length of lay equals the length of the specimen before untwisting divided by the number of turns found during untwisting.DIRECTION OF LAYThe direction of lay is visually determined according to its definition.LINEAR DENSITY(2)A specimen of cord of known length is weighed.(1) (2) (1) RESIDUAL TORSIONSOne end of a specified length of cord is allowed to turn freely: the number of revolutions is counted and the direction noted.ARC HEIGHTAfter releasing the end of the specimen used for the residual torsion determination, the height of the arc, expressed in mm and at an interdistance of 300 mm, shall be measured.FLAREThe spreading of the filament ends or the strand ends is observed after cutting the cord or strand.BREAKING FORCE (1)A specimen of cord is clamped in a tensile testing apparatus under a defined pre-tension and subjected to a constant rate of extension until