1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1991 10 17 NB00I10043054130 Released B.H. Chen AJSWP 3948-a Page 1 of 3 CORD, BRAIDED, NON-WOVEN POLYPROPYLENE FILLED WSB-M6H43-A1. SCOPEThe mat erial defined by this specification is a round cord c
2、onsisting ofa braided polyester jacket and filled with non-woven polypropylenesheeting.2. APPLICATIONThis spe cification was released originally for material used as a softwelt, wrapped with cloth or leather sheath, for seat trim covers.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform t
3、o the requirements of Ford Quality SystemStand ard Q-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.3.2 INFR
4、ARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/ortherma l analysis of material/parts supplied to this specification.The IR spectra and thermograms established for i nitial approval shallconst itute the reference standard and shall be kept on
5、 file at thedesignated material laboratory. All samples sha ll produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial conditioned ina control led atmo
6、sphere 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 DIAMETER 14.0 +/- 0.5 mmENGINEERING MATERIAL SPECIFICATIONWSB-M6H43-AWP 3948-b Page 2 of 3 3.5 COMPOSITION(ASTM D 276)Braided Jacket 100 % p
7、olyesterFiller 100 % non-wovenpolypropylenesheeting3.6 CONSTRUCTIONPicks/cm, range 3.3 +/- 0.3Braid 16 ends, 7.8 tex(texturedpolyester)Filler Thickness 0 .254 +/- 0.025 mm3.7 BREAKING STRENGTH, min 482 N(ASTM D 1682, Grab Method, avg. of 5 tests)3.7.1 Elongation at Break, min 35 %(ASTM D 1682, Grab
8、Method, (avg. of5 tests)3.8 FOGGING(FLTM BO 116-03)Fog Number, min 60The formation of droplets or coalescence into a clear film is causefor rejection.3.9 FLAMMABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minute3.10 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured par
9、ts shall bespecified on the Engineering drawing, Engineerin g parts specificationand/or performance specifications. All critical areas with respect tothese properties shall be clearly designated on the engineeringdrawing.3.11 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must
10、be equivalent inal l characteristics to the material upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATIONWSB-M6H43-AWP 3948-b Page 3 of 3 Pri or to making any change in the properties, composition,constr uction, color, processing or labeling of the materialorig inally approve
11、d under this specification, whether or not suchchange 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 Enginee
12、ringactivity. Test data, t est samples and a new 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, u
13、nlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first
14、 obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the
15、 test faci lity, demonstratingful l compliance with all the requirements of this specification (testresults, not nominal values), the material designation a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for i ntended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.
