1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1990 09 17 NB00E1005894000 Released D.DiGregoria E.Rezendes M.PerchardWP 3948-a Page 1 of 10 SEALER, HOT MELT, PREFORMED, MAGNETIC, ESB-M4G322-APAINTABLE1. SCOPEThe material defined by this specification is an ex
2、truded ethylene vinylacetate base hot melt sealer with a magnetic composition. This material wasoriginally used to seal horizontal and vertical weld joints, such as thelower back panel to quarter panel. The material must be applied overelectrocoat or spray primer.2. APPLICATIONThis material is suita
3、ble for use on interior and exterior Class No. 2surfaces, and will present an acceptable appearance for such areas whenpainted.Compliance with the performance requirements of this specification does notguarantee the hot melt sealers will function for all similar applicationson a vehicle. The specifi
4、c design condition should be evaluated by a planttrial or laboratory simulation prior to production release of the material.3. REQUIREMENTS3.1 STATISTICAL PROCESSSuppliers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Control Plan as describedtherein is
5、 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 SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/orthermal
6、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 thedesignated material laboratory. All samples shall produce IR spectraand thermograms that correspond to the
7、reference standard when testedunder the same conditions.NOT TO BE USED FOR NEW DESIGN2016 N Status Replaced by WSS-M18P20-A1 B. Witkowski, NAENGINEERING MATERIAL SPECIFICATIONESB-M4G322-AWP 3948-b Page 2 of 10 3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma teria
8、l 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.3.4 DIMENSIONS As specified on engineeringdrawing and/or in Trim and SealerManual3.5 CONSISTENCY(ASTM D 1321,
9、100 g total load)3.5.1 As received 2.0 - 4.0 mm3.5.2 Aged, 72 h at 49 C 2.0 - 4.0 mm3.6 SOLIDS, min 99 %(ASTM D 2046, except heat at 102 +/- 3 Cfor 3 h in a mechanical convection oven)3.7 ASH (based on solids weight), max 63 %Test Method: Place cru cible containing the solids residue in a coolmuffle
10、 furnace. Slowly heat to and maintain at 760 +/- 30 C for 1 h,cool in desiccator, and weigh.3.8 SPECIFIC GRAVITY, min 1.8(ASTM D 297, Hydrostatic Method)Toler ance for any supplier shall be +/- 0.01 based on the recordedspecific gravity of his originally approved production sample.3.9 TENSILE STRENG
11、TH, min Low Bake 1.4 kPa(ASTM D 412, Die “C“, High Bake 3.4 kPaPulled at 25 mm/min)3.10 ELONGATION, min Low Bake 22 %(ASTM D 412, Die “C“) High Bake 22 %3.11 MANDREL BEND TEST No cracking or(FLTM BV 22-1, material bake schedule per adhesion failure5.3, heat age test specimen 14 days at 70+/- 1 C bef
12、ore test)3.11.1 Test at 23 +/- 2 C3.11.2 Test at - 29 +/- 1 CENGINEERING MATERIAL SPECIFICATIONESB-M4G322-AWP 3948-b Page 3 of 10 3.12 FLOW CHARACTERISTICS, mm(Material bake schedule per para 5.3)3.12.1 Minimum Bake Exposure 0 - 3 mm3.12.2 Maximum Bake Exposure 0 - 3 mmTest Method: Two 0.8 x 100 x 1
13、50 mm electrocoat ed panels areto be us ed for determining flow properties. Panels coatedwith electrocoat paint described per para 5.2 ma y be used fortesting. Apply a 1.5 x 25 x 125 mm ribbon of material ontwo ele ctrocoated panels. See sketch below. To assureuniform material contact , roll the mat
14、erial ribbon with a2.0 kg oller (ASTM D 100 0) using one forward and backwardstroke. Scribe each panel to mar k the original material location.Position test panels at 53 +/- 2 deg attitude and condition1 h at 23 +/- 2 C. See sketch. It is recommended that a metal panel rack, manufacturedby A tlas El
15、ectric Devices Corp. - Chicago, IL, ModelNo.19-1323-00, or equivalent, be used to maintain the testpanels at the 53 +/- 2 deg attitude during flowevaluation tests. Maintain the test panels at a 53 +/- 2 deg angle andcure one panel at the mi nimum bake schedule per para 5.3.Subject the remaining test
16、 panel to the maximumbake schedule per para 5.3. Allow panels to cool at a 53 +/- 2 deg attitude for 1 hat 23 +/- 2 C. Deter mine flow by measuring the distance the materialhas m oved below the scribe marks. After flow test, thematerial shall appear as a continuous uninterrupted film;any sealer sepa
17、ration will constitute a failure.FLOW TESTENGINEERING MATERIAL SPECIFICATIONESB-M4G322-AWP 3948-b Page 4 of 10 3.13 ADHESIONShall not be removable in a continuous coherent film when subjectedto the following environments:3.13.1 Normal, 24 h at 23 +/- 2 C3.13.2 Salt Spray, 500 h(ASTM B 117)3.13.3 The
18、rmal Cycle (5 Times). 4 h at 83 +/- 2 C. 4 h at 38 +/- 1 C and 95 - 100 % R.H. 16 h at - 29 +/- 1 C. 4 h at 38 +/- 1 C and 95 - 100 % R.H. 4 h at 83 +/- 2 C. 4 h at - 29 +/- 1 CSa mple Preparation: For each adhesion test exposure notedabove, prepare samples as follows:. Ap ply a 1.5 x 25 x 200 mm ri
19、bbon of material along thecenter line of two 0.8 x 100 x 300 mm panels. Use a 2 kg roller, as described in para 3.12 to assure uniform materialcontact with panel. Subjec t one panel of each substrate to the minimumbake schedule, and the other panel to the maximum bakeschedule described per para 5.3.
20、 Panels are to be in a flatattitude during bake cycle. Condi tion panels at 23 +/- 2 C for 1 h minimum in aflat position.Test Method:. Subject test panels to exposures noted. Condition panels at 23 +/- 2 C for a minimum of 2 h priorto evaluating adhesion. Eva luate sealer adhesion to each test panel
21、 by makingtwo parallel cuts across ribbon of material. Cuts shouldbe through to metal and 25 mm apart. Check adhesionby inserting the tip of a squared spatula under the edgeof th e 25 mm wide section of material, and then attemptto ha nd peel sealer at a 90 deg angle to panel.Material should fail co
22、hesively rather than delaminatingcleanly from substrate surface.3.14 LOW TEMPERATURE RESISTANCE No cracking oradhesion failureENGINEERING MATERIAL SPECIFICATIONESB-M4G322-AWP 3948-b Page 5 of 10 Test Method:. Prepare and cure two test panels of each substrate usingprocedure described in para 3.13. A
23、fter minimum and maximum bake schedu les, condition samples at 23+/- 2 C for 1 h minimum. Expose all test panels for 7 days at 70 +/- 2 C. After he at exposure, condition panels at 23 +/- 2 C for 1h minimum. Attach each test panel along the bott om edge of a 0.8 x 300 x 300mm CRLC steel panel with p
24、op-rivets or sheet metal screws. Thelong side of test panel should align with bottom edge of 300 x 300mm panel.3.15 BRIDGINGTest Method:. Prepare two test fixtures using 0.8 x 100 x 300 mm electrocoatedanels prepared per para 5.2 as shown in Figure 2.FIGURE 2BRIDGING TEST FIXTURE PREPARATIONENGINEER
25、ING MATERIAL SPECIFICATIONESB-M4G322-AWP 3948-b Page 6 of 10 . Apply a 1.5 x 25 x 200 mm ribbon of material to each test fixtureas shown in Figure 3.FIGURE 3SEALER APPLICATION. Cure one test fixture at the minimum bake sch edule per para 5.3.1.Subject the second test fixture to the maximum bake sche
26、dule perpara 5.3.1. Allow test fixtures to cool for 1 h at 23 +/- 2 C. Inspection Test Method:. Inspect test fixture to insure that material has satisfactorilybridged raised portion of panel as shown in Figure 2, SectionB. Any evidence of tearing will constitute a failure. Material has satisfactoril
27、y bridged metal-to-metal portion ofthe panel as shown in Figure 2, Section A. Any evidence ofgapping will constitute a failure.ENGINEERING MATERIAL SPECIFICATIONESB-M4G322-AWP 3948-b Page 7 of 10 . Place assembled panels and cold slam apparatus described in FLTMBN 1-2 in a cold box and condition at
28、- 29 +/- 2 C for a minimumof 4 h. Individually mount 3 00 x 300 mm panels on the slam apparatus withthe test material at the bottom facing away f rom fixture. Slam 10times at - 29 +/- 2 C.3.16 COMPATIBILITY WITH PRODUCTION PAINTSThis material shall be compatible with all current production paintsyst
29、ems.No tackiness, porosity, cracking, or other delet erious effects on topcoats are permissible, unless they are within acceptable appearancestandards established for Class No. 2 surfaces.3.16.1 240 h Weatherometer Exposure(Equipment described in FLTM BO 1-1)3.16.2 96 h Dry Ultraviolet Light Source(
30、Equipment described in FLTM BV 7-2)Tes t Method: Evaluate current production spray primers and topcoat pa int systems as identified by the Body and ChassisEngineering Office. Three 0.8 x 100 x 300 mm panels of substrate described inpara 6.2 are to be prepared for each top coat systemevaluated. Apply
31、 material ribbon “A“ (1.5 x 25 x 125 mm) on centerline of substrate panels as shown in Figure 4. Use 2 kgroller as described in para 3.10.2. Apply appropriate spray primer to entire surface of panelsper ESB-M2P4. Cure primer 10 minutes at 149 +/- 2 C metaltemperature. Allow panels to cool to 23 +/-
32、2 C and apply materialribbon “B“ (1.5 x 25 x 125 mm) as shown in Figure 4. Rollwith 2 kg roller per para 3.12.2 taking care to avoidroller contact with first ribbon applied. Apply appropriate top coat paint to entire test panelsurface per ESB-M2P4. Cure top coat 8 minutes at 120 +/-1 C metal tempera
33、ture plus a peak of 3 minutes at 130 +/-2 C metal temperature. Subject one panel of each top coat system to exposures perpara 3.16.1 and 3.16.2. Retain remaining panel as control. After exposures are completed, examine test panels andcompare to control panel.ENGINEERING MATERIAL SPECIFICATIONESB-M4G
34、322-AWP 3948-b Page 8 of 10 3.17 PACKAGINGThe material shall be supplied in sealer packages and materialblocking is not permitted during container shipping or storage.3.18 STORAGE STABILITYThe material shall be stored at temperatures bel ow 41 C away from allsources of heat and sunlight. Heat greatl
35、y acce lerates aging. Underthese storage conditions, the minimum shelf life of the materialshall be 6 months. When these materials are stored at temperaturesbelow 23 C, they shall be conditioned at room temperature 24 h priorto application. Adequate conditioning permits t he material to obtainits op
36、timum application properties.3.19 FOGGING TEST(FLTM BO 116-03)Fog Number, min 60 %Any fog film present sh all be examined for the formation of dropletsor coalescence into a clear film. Such conditio ns, if present, shallbe cause for rejection. Uncured and cured samples shall be tested.3.20 FUNCTIONA
37、L APPROVALMaterial being evaluated for initial approval to this specificationshall be subjected to a production trial. Functional trial resultsshoul d be available to Design and Materials Engineering prior tomaterial approval and release.3.21 ADDITIONAL REQUIREMENTSSpecific requirements for material
38、 and/or manufa ctured parts shall bespecified on the engineering drawing, engineerin g parts specificationand/or performance specifications. All critical areas with respect tothese properties shall be designated on the Engineering drawing.3.22 SUPPLIERS RESPONSIBILITYAll materials supplied to this s
39、pecification 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 this specification, whether or not suchch
40、ange 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 Engineeringactivity. Test data, t est samples and a new
41、code identification areto be submitted with the request.ENGINEERING MATERIAL SPECIFICATIONESB-M4G322-AWP 3948-b Page 9 of 10 Substance restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification
42、 WS S-M99P9999-A1, unlessa 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 m
43、aterials 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 Engineeringactivity its own laboratory rep ort to the specification (test results, notnominal values), the m
44、aterial designation and code number, and testspecim ens for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List.5. GENERAL INFORMATIONThe information given below is provided for clarification and assistancein meeting the requirements of this spe
45、cification.5.1 MECHANICAL CONVECTION OVENThe mechanical oven(s) used to cure the material shall be capable ofobtaining 205 C metal temperature on body steel (0.8 - 0.9 mmthickness) within 8 - 10 minutes.5.2 SUBSTRATESNominal panel dimensions are 0.8 x 100 x 300 mm.Ele ctrocoat primed steel panel: Pr
46、epared per ESB-M2P4 performancespecification. Use current production paints as identified by theBody and Chassis Engineering Office.5.3 MATERIAL CURE SCHEDULES5.3.1 Minimum (includes two bakes):Bake Schedule I 10 minutes at 149 +/- 1 C metaltemperatureBake Schedule II 8 minutes at 102 +/- 1 C metaltemperatureplus3 minutes at 130 +/- 1 C metaltemperature5.3.2 Maximum: 20 minutes at 177 +/- 1 C metaltemperature5.4 COLOR Dark Brown or as specifiedby B&AGOENGINEERING MATERIAL SPECIFICATIONESB-M4G322-AWP 3948-b Page 10 of 10 FIGURE 4PAINT COMPATIBILITY
