1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1993 02 26 C10258809 Clause 3.5.1 revised N J Komatsu1992 06 30 C10225456 Released J. JoshiWP 3948-a Page 1 of 4 FABRIC, NONWOVEN POLYPROPYLENE/POLYESTER EDGE WSD-M99H143-AMOULDED GRIPPER1. SCOPEThe
2、 material defined by this sp ecification is a uniform, non-woven fabricmade of polypropylene/polyester thermally bonded.2. APPLICATIONThis specification was released originally for material used as retainersupport strips on seat cushion and seat-back pad assemblies.3. REQUIREMENTS3.1 STATISTICAL PRO
3、CESSSupplie 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. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in the final product is
4、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 specification.The IR spectra and ther mogram established for initial approval shallconst itute the reference s
5、tandard 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 same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial cond
6、itioned 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 FABRIC COMPOSITION Polypropylene/(ASTM D 629) Polyester3.5 REQUIREMENTS FOR EDGE GRIPPER STRIP3.5.1 As specified
7、 in WSK-M4D 670-A, WSK-M4D660-A/A2, WSK-M4D741-A1or engineering approved alternative.ENGINEERING MATERIAL SPECIFICATIONWSD-M99H143-AWP 3948-b Page 2 of 4 3.6 WEIGHT, min(FLTM BN 106-01)3.6.1 Fabric 170 - 210 g/m23.7 LAMINATED FABRIC3.7.1 Breaking Strength, min(ASTM D 1682, GT Method, 300 mm/minute,
8、average of 5 samples)WMD 500 NAMD 600 N3.7.2 Tear Strength (trapezoid), min(FLTM BN 122-01)WMD 150 NAMD 180 N3.7.3 Seam Strength, min(FLTM BN 119-01)WMD 500 NAMD 500 N3.7.4 Dimensional Stability, max(1 h at 100 +/- 2 C, specimen size250 x 250 mm)WMD 1 %AMD 1 %3.7.5 Bond Strength to Gripper Strip, mi
9、n(FLTM BN 151-05) 65 N3.8 FOGGING(FLTM BO 116-03, 3 h at 100 +/- 2 C)Fog Number, min 60The formation of droplets or coalescence into a clear film shall because for rejection.3.9 SQUEAKINGThis material shall not cause objectionable noises when used in theproduction seat assembly.3.10 FUNCTIONAL APPRO
10、VALMaterials being evaluat ed for initial approval to this specificationshall be subjected to a production functional trial. The functionaltrial results shall be available to design and material engineeringactivities prior to material approval and release.ENGINEERING MATERIAL SPECIFICATIONWSD-M99H14
11、3-AWP 3948-b Page 3 of 4 3.11 FLAMMABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minute3.12 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing, Engineerin g parts specificationand/or performance specifications. All crit
12、ical areas with respect tothese properties shall be clearly designated on the engineeringdrawing.3.13 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pri or to making any change i
13、n the properties, composition,const ruction, colour, processing or labelling of the materialorig inally approved 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
14、 Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. 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 ad
15、dressed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P9999-A1, unlessa dif ferent 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 approva
16、l by theresponsible Materials Engineeri ng activity. Suppliers desiring approval ofthe ir materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivi
17、ty a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the 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 specime
18、ns 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.ENGINEERING MATERIAL SPECIFICATIONWSD-M99H143-AWP 3948-b Page 4 of 4 5. GENERAL INFORMATIONThe information given below is provided for clarification and assistancein meeting the requirements of this specification.5.1 WIDTH As specified on(ASTM D 3774) Engineering Drawing
