1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1992 03 13 C10181197 Released J. JoshiWP 3948-a Page 1 of 3 ELASTIC TAPE, WOVEN WSD-M6H42-A1. SCOPEThe material defined by this specification is a woven elastic tape.2. APPLICATIONThis specification
2、 was released originally for material used in front seatcushion assemblies.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropr
3、iatestatist ical tools must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of material/parts supplied to this s
4、pecification.The IR spectra and ther mogram established for initial approval shallconst itute the reference standard and shall be kept on file at thedesignated material laboratory. All samples sha ll produce IR spectraand thermogram that cor respond to the reference standard when testedunder the sam
5、e conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial conditioned ina control led atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.3.4 WID
6、TH 19 +/- 1.0 mm(ASTM D 259)All other dimensions as specified on Engineering Drawings.3.5 WEIGHT, min 230 g per 10 m(ASTM D 259) lengthENGINEERING MATERIAL SPECIFICATIONWSD-M6H42-AWP 3948-b Page 2 of 3 3.6 YARN SIZE AND YARN TYPEWarp, ends/full width, min 20 of 36/40 Extruded Rubber coreco vered wit
7、h 3 yarns of 200 dTexRayon spirally wound, and 50 of300 dTex x 2 polyester-nylonWeft, picks/10 cm, min 180 double, 330 dTex rayonAlternative Composition s and Constructions may be used provided thatthey meet:. Design Appearance requirements. Component Engineering functional and feasibility test re q
8、uirements. Laboratory tests quoted in the relevant Material Specification.Appro val for the use of such alternative Compositions andCo nstructions must be obtained in writing from the ComponentEngineering and Materials Engineering Activities. Engine ering approvedConstr uctions shall be indicated on
9、 all relevant Quality Controldocuments.3.7 BREAKING STRENGTH, min, full width 200 N(ASTM D 1682, 1C, 300 mm/minute, initial jawseparation 75 mm)3.8 MODULUS OF RETENTION3.5.1 Before Heat Aging, min 10 N3.5.2 After Heat Aging, max loss 50 %Test Method:Mar k off a 125 mm section in the centre of a 225
10、mm testspecimen . Insert the test specimen 25 mm into both top andbottom jaws of a Constant-Rate-of-Extension (CRE) type t ensilemachine. Extend the 125 mm area of the test specimen 20 % andrecord load.Heat age the same test specimen in a mechanical convectionoven maintained at 85 +/- 2 C for 48 h a
11、nd repeat 20 %extension.3.9 SHRINKAGE/EXPANSION, max(FLTM BN 105-01, except mark off a 250 mmlength section in the center of a 300 mmlong test specimen)Warp 15 % 3.10 FLAMMABILITY(ISO 3795/SAE J369)Burn rate, max 100 mm/minuteENGINEERING MATERIAL SPECIFICATIONWSD-M6H42-AWP 3948-b Page 3 of 3 3.11 FO
12、GGING(FLTM BO 116-03, 3 hours at 100 C)Fog Number, min 60Formation of excessive amounts of clear film or droplets is cause forrejection.3.12 ADDITIONAL REQUIREMENTSSpecific requirements for mater ial and/or manufactured parts shall bespecified on the Engineering dr awing, Engineering parts specifica
13、tionand/or performance specificatio ns. All critical areas with respect tothese p roperties shall be clearly designated on the engineeringdrawing.3.13 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equ ivalent in allchar acteristics to the material upon which approval w
14、as originallygranted.Prio r to making any change in the properties, composition,construction, colour, processing or labelling of the materialorigi nally approved under this specification, whether or not suchchanges affect the materials ability to meet the specificationrequirements, the Supplier shal
15、l notify Purchasing, Toxi cology and theaff ected Materials Engineering activity of the proposed changes andobta in the written approval of the Materials Engineering activity.Test data , test samples and a new code identification are to besubmitted with the request.Substa nce restrictions imposed by
16、 law, regulations or Ford, apply toth e materials addressed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1, unlessa different suffix (e.g. A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMaterials defi
17、ned by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval oftheir mat erials shall first obtain an expression of interest from theaffecte d Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall s
18、ubmit to the affected Materials Engineeringact ivity a completed copy of their laboratory test reports, signed by aqualified and authorized repres entative of the test facility, demonstratingfu ll compliance with all the requirements of this specification (testresults, not nominal values), t he mate
19、rial designation and code number, andtest spec imens for Ford evaluation. Fords engineering approval of amateria l will be based on its performance to this specification and on anassess ment of suitability for intended processes and/or applications. Uponapproval, the material will be added to the Engineering Material ApprovedSource List.
