1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1996 01 26 Activated D. Henrickson LAGWP 3948-a Page 1 of 3 WEBBING, NYLON, TETHER STRAP, 50 mm WIDE WSS-M7H56-A1. SCOPEThe mat erial defined by this specification is a nylon tether strap wovenwit h continuous fi
2、lament yarn and finished selvages. Proper dyes anddyeing procedures shall be employed to provide acceptable colors,app earance, and physical properties. Color stripping for redyeing ofwebbi ng rejected for color is not allowed. The webbing shall be of goodquality and uniform construction.2. APPLICAT
3、IONThis spe cification was released originally for material used as a tetherstrap in airbag assemblies for the 1997 Econoline.3. REQUIREMENTS3.1 QUALITY SYSTEM REQUIREMENTSMaterial suppliers and part producers must conform to Quality SystemRequirements, QS-9000. Material specification r equirements
4、are to beused fo r initial qualification of materials. A Control Plan forong oing production verification is required. This plan must bereviewed and approved b y the relevant Ford Materials activity and/orFor d Supplier Technical Assistance (STA) prior to production partssubmission. Appropriate stat
5、istical tools must be used to analyzepr ocess/product data and assure consistent processing of thematerials.Part pr oducers using this material in their products must use Fordapproved materials and must conform to a process control plan whichhas been approved by STA and/or the relevant Materials Act
6、ivity.3.2 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.ENGINEERING MA
7、TERIAL SPECIFICATIONWSS-M7H56-AWP 3948-b Page 2 of 3 3.3 APPEARANCE(FLTM BI 109-01)The col or, pattern, and finish shall match the approved sample, orshall be as specified on the engineering drawing.Note: This webbing is to be manufactured with a plain tubularpattern.3.4 THICKNESS, range 1.50 +/- 0.
8、15 mm(SAE J882)3.5 WIDTHMeasured at less than 22 N load3.5.1 Minimum 48.5 mm3.5.2 Maximum 51.5 mm3.6 COMPOSITION(ASTM D 629)Nylon, Type 6 100 %3.7 WEIGHT, min 5.5 kg/100 m3.8 BREAKING STRENGTH, min 17 800 N(FMVSS 209, S5.1(b)3.9 ELONGATION, max 7.0 % at 1 555 N(FMVSS 209, S5.1(b),except use 445 N pr
9、eload)3.10 FOGGING(SAE J1756, 3 h at 100 C heating, 21 C coolingplate, post test conditioning 1 h)Fog Number, min 70Formation of clear film, droplets or crystals is cause for rejection.3.11 FLAMMABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minute3.12 ADDITIONAL REQUIREMENTSSpecific requirements f
10、or material and or manufa ctured parts shall bespecified on the engineering drawing, Engineerin g parts specificationand/or performance specifications. All critical areas with respectto these properties shall be designated on the Engineering drawing.ENGINEERING MATERIAL SPECIFICATIONWSS-M7H56-AWP 39
11、48-b Page 3 of 3 3.13 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pr ior to making any changes in the properties, composition,constr uction, color, processing or labeling of t
12、he materialorig inally approved under this specification, whether or not suchchange s affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed changesand obtain the written app
13、roval 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 addressed by this document. The restrictions aredefined in Engineering Material spec
14、ification WSS-M99P9999-A1.4. 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 ted Purchasing, Design and
15、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 test faci lity, demonstratingful l compliance with all the requirements of
16、 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 intended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.
