1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Released1994 11 10 NB00E10043064150 Revised Para 3.5 M. Trapp LAG BCF1994 05 26 NB00I10043054334 Released M. Trapp LAG BCFWP 3948-a Page 1 of 3 SEALER, ELASTOMER, HOT APPLY WSB-M4G352-A1. SCOPEThe material defined
2、by this specification is a thermpolastic blend ofpolymers and synthetic elastomers.2. APPLICATIONThis specification was released originally for material used to seal wiresplices in electrical wiring harnesses. It is applied by a process ofdipping a splice in the heated molten material. After cooling
3、, thismaterial provides an effective flexible encapsulation.3. REQUIREMENTSIn addition to the requirements specified herein, the finished encapsulatedsplice shall pass applicable performance specifications specified on theengineering drawing.3.1 STATISTICAL PROCESSSuppliers must conform to the requi
4、rements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatistical tools must be used to analyze process/product data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROP
5、HOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/orthermal analysis of material/parts supplied to this specification.The IR spectra and thermograms established for initial approval shallconstitute the reference standard and shall be kept on file at thedesi
6、gnated material laboratory. All samples shall 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 material conditioned ina controlled atmosphere of 23 +/- 2
7、C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.NOT TO BE USED FOR NEW DESIGN2014 N Status No replacement named L. Sinclair, NAENGINEERING MATERIAL SPECIFICATIONWSB-M4G352-AWP 3948-b Page 2 of 3 3.4 DENSITY AT 2
8、3 C 0.76 - 0.96 kg/L(ASTM D 1475)3.5 VISCOSITY 560 - 2790 mPa.s(ASTM D 4402, Brookfield Thermosel ModelRVT, #27 spindle, 20 rpm, 177 C)3.6 LOW TEMPERATURE FLEXIBILITY at - 30 C No crackingTest Method: Condition a 25 x 200 x 0.5 mm strip of material for 24h at - 30 C. Then flex it five times around a
9、 conditioned 12 mmmandrel.3.7 WATER ABSORPTION, max(ISO 62, Method 1)24 h immersion 0.0 %4 weeks immersion 0.0 %3.8 COPPER CORROSION No discoloration(FLTM BU 106-01)3.9 DIELECTRIC BREAKDOWN STRENGTH 10 kV/mm(IEC 243/ASTM D 149, short time)3.10 OZONE RESISTANCE Rating 0(FLTM BP 101-01)No checking or
10、crazing visible under 7X magnification.3.11 FLAMMABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minute3.12 FOGGING(FLTM BO 116-03)Fog Number, min 75The formation of droplets or coalescence into a clear film is causefor rejection.3.13 HEAT AGED(ISO 188/ASTM D 573, 150 +/- 50 airchanges/h, 1000 h at
11、80 +/- 2 C)3.16.1 Hardness Change, max +/- 20 %3.16.2 Tensile Strength Change, max +/- 25 %3.16.3 Elongation Change, max +/- 25 %3.16.4 Visual EvaluationENGINEERING MATERIAL SPECIFICATIONWSB-M4G352-AWP 3948-b Page 3 of 3 No surface tackiness or cracks when folded flat against itself.3.14 STORAGE STA
12、BILITYIt is recommended that the material shall be stored at temperaturesbelow 70 C a way from all sources of heat and sunlight. When themat erial is stored at room temperatures below 23 C, it shall beconditioned at room temperature 24 h prior to application.3.15 FUNCTIONAL APPROVALMaterials being e
13、valuated for approval to this s pecification shall besubject ed to a production trial. Functional trial results must beapproved by the affected assembly operation and Design Engineering.Results shall be made available to Materials Engineering prior tomaterial approval and release.3.16 SUPPLIERS RESP
14、ONSIBILITYAll 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 in the properties, composition,constr uction, color, processing or labeling of the materialorig inally approved under
15、 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 Engineeringact
16、ivity. 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 WSS-M99P9999-A1.4. APPROVA
17、L 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 Materials Engineering activity. Upon
18、request, 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 this specification (testresults, no
19、t 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.
