1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Released1994 05 17 NB00I10043054366 Released E.R.Rezendes N.E. LindsayWP 3948-a Page 1 of 6 SEALER, SYNTHETIC RESIN BASE, THUMBABLE WSB-M4G32-C1. SCOPEThe ma terial defined by this specification is a synthetic base
2、d thumbablesealer. 2. APPLICATIONThis sp ecification was originally released for material used to providewater tigh t seals for wiring harnesses, fire wall holes, and roof panelflanges for application on the trim line. 3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements
3、 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 INFRARED SPECTROPHOTOM
4、ETRY 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 file at thedesign
5、ated 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 atmosphere of 23 +/- 2
6、 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame conditions unless otherwise specified.ENGINEERING MATERIAL SPECIFICATIONWSB-M4G32-CWP 3948-b Page 2 of 6 3.4 DIMENSIONS As specified on engineeringdrawings.3.5 SOLIDS, min 99 %(ASTM D 2834, except hea
7、t at 100 +/-2 C for 3 h in a mechanical convection oven)3.6 VISCOSITY 9 - 12 mm(ASTM D 217, with 150 gadditional weight)3.7 WEIGHT PER VOLUME(ASTM D 816)The weig ht tolerance for any one supplier shall be +/- 0.04 kg/L,based on the recorded weight of the originally approval productionsample. Refer t
8、o para 5.3 for additional information.3.8 FLEXIBILITY No crackingTest Method: Apply a 40 x 170 x 3 mm sample of a 75 x 255 mm sheetof alum inum foil using a light finger pressure. Condition theassembly at -30 +/- 1 C for 16 h. Bend 180 degrees around atemperature conditioned 25 mm diameter mandrel.
9、Repeat on a sampleaged for 2 4 h at 100 +/- 2 C. Repeat the above procedure, exceptbake the assembly for 20 min at 177 +/- 2 C (metal temperature).3.9 WATER LEAK RESISTANCE No water leaksTest Assembly Preparation: A 275 x 8 mm length of sealer shall beapplied in a “U“ config uration to a 100 x 100 x
10、 0.8 mm electrocoatedstee l panel prepared per para 5.1. A second 100 x 100 x 0.8 mmelectrocoated steel panel shall be placed over the sealer materialand compressed 10% using spacers as a guide. The fixture must beclamp ed or bolted to maintain the 10% compression throughout thetest. Test Method: Co
11、ndition the assembly at 23 +/- 2 C for 1 h. Standthe assembly on edge with the opening of the “U“ channel up. Fillthe channel to a depth of 100 mm (approximately 13 mm from the topedge) with colored water and let stand for 24 h. Observe for anyevidence of water leaks.Note: Stand the test assembly on
12、 a sheet of white paper for easierwater leak detection.Expose two assemblies, prior to filling with colored water, to theconditions below:3.9.1 24 h at 23 +/- 2 C3.9.2 20 min at 177 +/- 2 C (metal temperature). Condition at 23+/- 2 C for 24 h before testing.ENGINEERING MATERIAL SPECIFICATIONWSB-M4G3
13、2-CWP 3948-b Page 3 of 6 3.10 SAG RESISTANCE3.10.1 Horizontal, max 3 mm3.10.2 Vertical, max 3 mm3.10.3 Inverted No loss of materialTest Method: Apply a 50 x 8 mm bead along the c enter line ofthree panels for each substrate prepared per para 5.1.Scribe panels to mark the initial material location.Co
14、ndition the panels with the material in the aboveorien tations for 1 h at 23 +/- 2 C. Immediately afterconditioning, place pan els in a mechanical oven at 150 +/- 2C for 30 minutes maintaining panel orientation d uring baking.Co ndition panel at 23 +/- 2 C for 1 h maintaining panelori entation. Dete
15、rmine the sag by measuring the materialmovement below the scribe mark.3.11 ADHESIONTe st Method: Apply a 50 x 8 mm bead of sealer to each of twoelectroc oated panels prepared per para 5.1. Pass a 2.2 kg rollerover the panel per ASTM D 1000. Bake one test panel at 177 +/- 2 C(metal temperature) for 2
16、0 minutes, condition at 23 +/- 2 C for 1 hprior to testing. Cond ition the other panel at 23 +/- 2 C for 24 h.Evaluate adhesion by cutting a 25 mm wide strip across the sealerbead. Using the tip of a squared spatula, lift the material at oneedge, then attempt to hand peel the material fro m the subs
17、trate at 90deg. Save the panels for corrosion resistance test, para 3.12.3.12 CORROSION RESISTANCE, min 500 h (ASTM B 117)No loss of adhesion or blistering of the material and no evidence ofcorrosion on the metal surface when subjected to salt spray.Test Method: Expose the panels prepared per para 3
18、11. Conditionthe test panels at 23 + /- 2 C for 24 h after exposure. Evaluate thematerial adhesion as described in para 3.11. Ex amine for evidence ofcorrosion originating under the sealer.3.13 COLD ADHESION No cracking, adhesion failure,(FLTM BV 101-02, Procedure “E“) or loss of material Test Meth
19、 od: Place a 75 x 80 x 23 mm sample on two 300 x 300 mmelectroc oated panels prepared per para 5.1. Pass a 2.2 kg rollerover the panels per AST M D 1000. Bake one test panel at 177 +/- 2 C(metal temperature) for 2 min, condition at 23 +/- 2 C for 1 h priorto testing. Condition the other panel at 23
20、/- 2 C for 24 h. Fortesting, condition both panels for 4 h at -30 +/- 2 C. Test at -30+/- 2 C for 10 slams.ENGINEERING MATERIAL SPECIFICATIONWSB-M4G32-CWP 3948-b Page 4 of 6 3.14 FOGGING(FLTM BO 116-03)Fog Number, min 60The formation of droplets or coalescence into a clear film is causefor rejectio
21、n.3.15 PAINT STAINING No migration stain(SAE J2020, 500 h, white and lightcolored metallic enameled panels)3.16 CLEANABILITY Shall be easilyremoved.Test Method: Prepare enameled panels as describ ed in FLTM BI 103-02,Method “C“, using currently released white produ ction paint. Age theenameled panel
22、s for 16 h at 38 +/- 1 C. Apply a ? x ? x ? mm sampleof sealer with finger pressure to the enamel panels. Condition for1 h at 23 +/- 2 C. Remove the sealer sample and wipe panels withmineral spirits (e.g. naphtha).3.17 ODORNo ob jectionable or irritating odors, both as received and afterstorage.3.18
23、 WATER ABSORPTION, max 5 %(FLTM BV 117-01, Method A, 8 h soak time)3.19 ELONGATION3.19.1 As Received, max 10%3.19.2 Aged at 70 +/- 2 C for 24 h, max 15 %Test Method: Remove a 8 x 1000 mm sample of sealer from itsbaking paper at a speed to simulate the backing paper removalin an assembly plant. Measu
24、re the length of the sealersample initially and after removal from the baking paper.% elongation = L2 - L1_ x 100L1L1 = Initial LengthL2 = Final Length3.20 FLAMMABILITY(ISO 3795/SAE J369)Burn Rate, max 100 mm/minuteENGINEERING MATERIAL SPECIFICATIONWSB-M4G32-CWP 3948-b Page 5 of 6 3.21 STORAGE STABI
25、LITYThe material shall be stored at temperatures bel ow 38 C away from allsources of heat and sunlight. Under these storage conditions, theshelf life o f the material shall be 3 months. There shall be nodif ficulty in removing the material from its backing paper whenstored under these conditions. Wh
26、en these materials are stored atte mperatures below 23 C, they shall be conditioned at roomtemperature prior to ap plication. Adequate conditioning permits thematerial to obtain its optimum application properties.3.22 FUNCTIONAL APPROVALMaterials being evaluated for initial approval to the specifica
27、tionshall be subjected to a production trial. Functional trial resultsshoul d be available to Design and Materials Engineering prior tomaterial approval and release.3.23 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall bespecified on the Engineering drawing,
28、 Engineerin g parts specificationand/or performance specifications. All critical areas with respectto these properties shall be clearly designated on the engineeringdrawing.3.24 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the mate
29、rial 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 this specification, whether or not suchchange s affect the materials ability to meet the specificationrequi
30、r ements, the Supplier shall notify Purchasing, Toxicology andthe affected 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
31、restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1.ENGINEERING MATERIAL SPECIFICATIONWSB-M4G32-CWP 3948-b Page 6 of 6 4. APPROVAL OF MATERIALSMat erials defined by this
32、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. Uponrequest, the Supplier shall submit to the
33、 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, not nominal values), the material designati
34、on 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 Mat
35、erial ApprovedSource List.5. GENERAL INFORMATIONThe information given below is provided for clarification and assistancein meeting the requirements of this specification.5.1 SUBSTRATESNominal panel dimensions are 100 x 300 x 0.8 mm.Electr ocoat Primed Steel Panel: Current production steel panelprepared per ESB-M2P4 performance specification, using currentpr oduction paints as identified by the Materials EngineeringActivity.5.2 COLOR Grey or as specified on theengineering drawing5.3 WEIGHT PER VOLUME 1.79 +/- 0.04 kg/L(ASTM D 816)
