1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name File Control No. Specification NumberDate Release No. Release/Revision1992 10 30 C10176310 3.8 Revised1991 03 28 C01031536 3.3.2 Revised1984 04 19 SM/ER 1044 TC Released J JoshiWP 3948-a Page 1 of 7 WEBBING, SEAT BELT ESD-M7H42-A1/A7ESD-M7H42-B1/B7ESD
2、-M7H42-C1/C61. SCOPEThe mate rial defined by this specification is a uniformly woven beltwebbing with improved resistanc e to twisting. The webbing has to meet ECE16.04.2. APPLICATIONThis specification was released originally for material used for inertiareel and/or static type safety belts in autom
3、otive vehicles.3. REQUIREMENTSTh e material must be conditioned for a minimum of 24 h at 23 +/- 2 C and50 +/- 5 % relative humidity prior to test and tested under the sameconditions.3.1 APPEARANCEColour, pattern and fin ish shall match the Master Sample as releasedby the Design department.3.2 IDENTI
4、FICATION3.2.1 By Appearance8 +/- 1 % Elongation-6 bars or 6 bars and 3 surface yarn orone surface yarn on plain pattern.12 +/- 1 % Elongation-8 bars or 8 bars and 3 surface yarn orno lines of surface yarns on plain pattern.15 +/- 1 % Elongation-1 2 bars and no surface yarn or 3 yarnson plain pattern
5、.17 +/- 1 % Elongation-9 bars or 9 bars and 3 surface yarn or2 lines of surface yarns on plain pattern.ENGINEERING MATERIAL SPECIFICATIONESD-M7H42-A1/A7DELTA ESD-M7H42-B1/B7ESD-M7H42-C1/C6WP 3948-b Page 2 of 7 3.2.2 By SuffixOrdinary SmoothEdge EdgeNon-Federal A 1 2 3 7 4 5 6Federal B 1 2 3 7 4 5 6L
6、ow Friction C 1 2 3 4 5 6% 8 12 17 15 8 12 17Any webbing with slits or cuts will be rejected.3.3 DIMENSIONS3.3.1 Width ESD-M7H42-A/C 48 + 1,0 mm- 2,0 mmL ESD-M7H42-B 48 +/- 1 mmAll other dimensions as specified on Engineering drawings.The width shall not be less than 46 mm under a tension of 10 kN.3
7、.3.2 Thickness (original), max(ASTM D 1777)ESD-M7H42-A1/2/3/4/5/6 1,3 mmESD-M7H42-B1/2/3/4/5/6 1,3 mmESD-M7H42-C1/2/3/4/5/6 1,3 mmESD-M7H42-A/B7 1,6 mmThickness after Humidity Aged Sample as per Para . 3.5.4. willbe within the specified limit. All other dimens ions shall beas specified on Engineerin
8、g drawings.3.4 CONSTRUCTION AND COMPOSITIONConstruction and compos ition of the webbing are at the discretion ofth e supplier, providing his product fully meets all of theperformance requirements laid down in this material specification.Each supplier must provide the Materials Laboratory, at the tim
9、e heseeks approval and reapproval for his material, with accurateconstruction, composition and original tensile s trength values x.bar-3S of minimum 20 tests.3.5 TENSILE STRENGTH(SAE Standard J4C, Paragraph 7.2)The webbing will be rejected if either edge of t he test sample breakswithin 5 % of the m
10、ax. breaking load being attained. The differencebetween the breaking lo ads of any two tests shall not exceed 10 % ofthe greater of the breaking loads being measured.ENGINEERING MATERIAL SPECIFICATIONESD-M7H42-A1/A7DELTA ESD-M7H42-B1/B7ESD-M7H42-C1/C6WP 3948-b Page 3 of 7 3.5.1 a) Tensile Strength (
11、original)ESD-M7H42-A) 1 & 4 min 28,00 kNor ) 2 & 5 min 24,75 kNESD-M7H42-C) 3 & 6 min 24,75 kNESD-M7H42-A 7 min 30,00 kNb) DELTA ESD-M7H42-B 1 & 4 min 28,00 kN2 & 5 min 27,10 kN3 & 6 min 24,75 kN7 min 30,00 kN3.5.2 Tensile Strength (wet)min 80 % of its original value.Immerse the test specimen for 3
12、h in distilled w ater to which0,1 % (by weight) of an ethylene-oxide condensate ofalkylphenol has been added as a wetting agent. After removalfrom water, shake off excess liquid and conduct the tensilestrength assessment within 5 minutes.3.5.3 Tensile Strength at Low Temperaturemin 80 % of its origi
13、nal value.Place the test specimen in a cold box maintained at minus 30+/- 2 C o n a flat surface for 1 1/2 hours. Fold the testspecimen upon itself and place a weight of 2 kg upon the bentsection for 30 minutes. The weight must be prev iously cooledto ambient temperature in the cold box. The ten sil
14、e strengthassessment is conducted within 5 minutes after removal fromthe cold box.3.5.4 Tensile Strength after Humidity Ageingmin 80 % of its original value.Place the test specimen in a humidity cabinet maintained at60 +/- 2 C and relative humidity of 65 +/- 5 % for 3 h. Thetens ile strength must be
15、 assessed within 5 minutes afterremoval from the humidity cabinet.3.5.5 Tensile Strength after Abrasion Testing(SAE J4C Paragraph 7.4, 2500 cycles)min 80 % of its original value.Abraded test samples should lie flat.3.5.6 Tensile Strength after Fadeometer Ageing(FLTM EU-BN 17-1, 200 SFH)min 60 % of i
16、ts original value.ENGINEERING MATERIAL SPECIFICATIONESD-M7H42-A1/A7DELTA ESD-M7H42-B1/B7ESD-M7H42-C1/C6WP 3948-b Page 4 of 7 3.5.7 Tensile Strength after Weatherometer Ageing(SAE J4C Para. 7.5, 100 h without water spray)min 60 % of its original value.3.6 ELONGATION(SAE J4C Para 7.2)1 & 4: 8 +/- 1 %
17、at 10 kN load2 & 5: 12 +/- 1 % at 10 kN load3 & 6: 17 +/- 1 % at 10 kN load7 : 15 +/- 1 % at 10 kN load3.7 ENERGY ABSORBING CHARACTERISTICSThe work done ratio shall not be less than 60 %.The work done: not less than 0,7 kN/1 mmPrepare a test specimen and fit into the tensile test machine so thatthe
18、distance between the clamps is 220 +/- 20 mm. Apply a force of200 N at a test rate of 100 mm/minute. Mark off a test span of 200mm equidistant between the clamps. Increase the force to 11 kN atthe s ame rate. Measure the elongation. Reduce the force to theoriginal 200 N at the same rate. Re-measure
19、the distance between thetwo marks of the test span. Plot the force/elon gation curve as shownin Fig. 1. Point A represents the point at which the force isincre ased from 200 N. Point B represents the point at which theforce reaches 11 kN. Point C represents the poi nt at which the forcereturns to 20
20、0 N. Point D is vertically below point B. Calculatethe work done ratio from the following formula:-% work done = (Area ABC/Area ABD) x 100Fig 1 Force/Elongation CurveENGINEERING MATERIAL SPECIFICATIONESD-M7H42-A1/A7DELTA ESD-M7H42-B1/B7ESD-M7H42-C1/C6WP 3948-b Page 5 of 7 3.8 STIFFNESS(ASTM D 747, T
21、inius Olsen, direct reading at 60 %)Original Warp: A1-6 20-50B1-6C1-6A/B-7 40-90Weft: A1-3-5 20-40B1-3-5A4-6 28-40B4-6C1-6 15-40A/B-7 10-45Span : 12,7 mmLoad : 0,575 kg cm3.8.1 Stiffness after Abrasion(SAE J4C Para. 7.4, 2500 cycles)min. 80 % of its original value in the weft direction.3.8.2 Stiffne
22、ss after Light Ageing(3.5.6 and 3.5.7 should be within the specified limit).3.9 CREASE RECOVERY(ASTM D1295, 20 N load,creasing time 1 minute, recovery time 1 minute).Warp, min 110Weft, min 1303.10 FRICTION FORCE, load N(FLTM Draft)max minC1-6 14,5 73.11 FASTNESS TO LIGHT3.11.1 Weatherometer, 100 h R
23、ating 4,0(SAE J4C Para 7.5)3.11.2 Fadeometer, 120 SFH Rating 4,53.12 FASTNESS TO RUBBING(SAE J4C Part 7.7)Dry Rating 4,0Wet Rating 4,0ENGINEERING MATERIAL SPECIFICATIONESD-M7H42-A1/A7DELTA ESD-M7H42-B1/B7ESD-M7H42-C1/C6WP 3948-b Page 6 of 7 3.13 FASTNESS TO WATER3.13.1 SAE J4C Para 7.8 Rating 3,03.1
24、3.2 FLTM EU-AN 1-1 Rating 5,03.14 FASTNESS TO PERSPIRATION Rating 4,0(FLTM EU-AN 1-1)3.15 WATER SPOTTING(FLTM EU-AN 1-1) No spots shallremain afterdrying.3.16 EDGE HARSHNESSThe edge harshness of the finished seat belt sha ll be no greater thanthat of the originally approved Master Sample issued by M
25、aterialsLaboratory, Product Engineering.3.17 FLAMMABILITY3.17.1 ESD-M7H42-A1/2/3/4/5/6/7, max Burn rate 100 mm/minute(ISO 3795)DELTA 3.17.2 DELTA ESD-M7H42-B1/2/3/4/5/6/7, 100 mm/minutemax Burn rate3.17.3 ESD-M7H42-C1/2/3/4/5/6, max Burn rate 100 mm/minuteIn order to comply with Federal Motor Vehicl
26、e Sa fety StandardNo. 302, the materials, portions of components a nd compositesshall not burn or transmit a flame across their surface, ata rate of more than 100 mm/minute. To demonstratecompliance, the sample size and method of testin g shall be inaccordance with FLTM EU-BN 24-2.3.18 PERFORMANCE E
27、NVIRONMENTAL AGEING REQUIREMENTAll materials, portions of components and composites defined by thisspecification that have not been treated modifie d or reformulated andexceed a maximum burn rate of 75 mm/minute as specified by theFlammability Lot Sampli ng Plan of FLTM EU-BN 24-2, must be evaluated
28、for permanency of the m aterials flame retardant properties per SKM-99P9500-A, Table 1 acco rding to the accelerated environmental ageingrequire ments applicable to the basic material category of thisparticular specification.ENGINEERING MATERIAL SPECIFICATIONESD-M7H42-A1/A7DELTA ESD-M7H42-B1/B7ESD-M
29、7H42-C1/C6WP 3948-b Page 7 of 7 Any material, portions of components or composites defined by thisspec ification that have been treated, modified or reformulated toconf orm to Flammability Lot Sampling Plan of FLTM EU-BN 24-2, regardless of maximum burn rate, must be evaluated forboth permanency of
30、materials flame retardant propertiesand changes in mechanical, chemical and physical properties perSKM-9 9P 9500-A, Table 1 applicable to the basic materialcategory of this particular specification.3.19 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-
31、101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.20 SUPPLIERS RESPONSIBILITYAll materials supplied to this s
32、pecification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pri or to making any change in the properties, composition,const ruction, colour, processing or labelling of the materialorig inally approved under this specification, whether or not such
33、change s affect the materials ability to meet the specificationrequir ements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. Test data, t est samples and a ne
34、w code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P9999-A1, unlessa dif ferent suffix (e.g. A2 or A3) is spe
35、cified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresp onsible Materials Engineering activity. Suppliers desiring approvalof thei r materials shall first obtain an expression of interest from theaffec
36、 ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal values), the material designation and code number, and testspecim ens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List.
