1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1996 09 05 Activated W. Curtiss G. MolnarWP 3948-a Page 1 of 7 SEALER, PRESSURE SENSITIVE, FOAM-IN-PLACE, WSB-M4G354-A HOT MELT1. SCOPEThe material defined by this specification is a foamable pressure sensitiveho
2、t melt sealer/adhesive. 2. APPLICATIONThis specification was released originally for material used to sealint erior and exterior components to prevent air, water, and dust leaks.Parts as sembled with this material shall be trapped or mechanically heldin plac e unless otherwise specified. This materi
3、al may be used in non-foa med applications, however, best results are achieved if foamed. Astatem ent shall be added to the drawing if the material is applied in thenon-f oamed state. The material can be applied with manual or roboticpumping equipment. 3. REQUIREMENTS3.1 QUALITY SYSTEM REQUIREMENTSM
4、aterial suppliers and part producers must conform to Quality SystemRequirements, QS-9000. Material specification r equirements 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 relevan
5、t Ford Materials activity and/orFor d Supplier Technical Assistance (STA) prior to production partssubmission. Appropriate statistical tools must be used to analyzepr ocess/product data and assure consistent processing of thematerials.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor
6、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 thedesignated material laboratory. All samples s
7、ha ll produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.ENGINEERING MATERIAL SPECIFICATIONWSB-M4G354-AWP 3948-b Page 2 of 7 3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial conditioned ina contr
8、ol 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 UNFOAMED BULK PROPERTIES3.4.1 SOLIDS, min 97 %(ASTM D 2834, except heat at 100 +/-1 2 for 3 h in a mechanical convectionoven. Sav
9、e sample for next test,para 3.5.)3.4.2 ASH (Based on solids weight) +/- 5 %(ISO 3491, Method A, 760 +/- 30 C)The ash content tolerance for any one supplier shall be +/-5 % ba sed on the recorded ash content for their originallyapproved production sample (refer to para 5.1).3.4.3 SPECIFIC GRAVITY(AST
10、M D 297)The specific gravity to lerance for any one supplier shall be+/- 0.03 based on the recorded specific gravity of theoriginal approved production sample, reference para 5.2.3.4.4 SOFTENING POINT +/- 15 C(ASTM E 28)Th e ring and ball softening point tolerance for any onesuppli er shall be +/- 1
11、5 C based on the recorded softeningpoint of the originally approved production samp le, referencepara 5.3.3.4.5 VISCOSITY (Brookfield)(ASTM D 3236)Thermosel spindle #SC4-27. 177 C, 10 rpm 18,000 - 28,000 cps. 191 C, 10 rpm 6,000 - 17.000 cps. 204 C, 10 rpm 5,000 - 10,000 cps3.5 FOAMED SEALER MATERIA
12、LNote: Unless otherwise specified, testing is don e at a foam reductiondensity of 60 %.Procedure: An unfoamed sample of the material is dispensed to aspecific volume. A foamed sample is dispensed to the same volume. Theweights of both samples are recorded. Calculations are as follows:1 - weight of f
13、oamed sample x 100 = Percent Foam Reductionweight of unfoamed sampleENGINEERING MATERIAL SPECIFICATIONWSB-M4G354-AWP 3948-b Page 3 of 7 3.5.1 COLD FLEXIBILITY No evidence ofcrackingTest Method: Expose a specimen 200 mm in length to atemperature of - 20 +/- 1 C for 5 hours. Bend 180 C arounda 13 mm t
14、emperature controlled mandrel. Test attemperature.3.5.2 COMPRESSION/RECOVERY, max 45 %(FLTM BU 114-01)Measure recovery after 5 minutes and 24 hours.3.5.3 FOGGING(FLTM B0 116-03)Fog Number, min 70The formation of droplets or coalescence into a clear filmis cause for rejection.3.5.4 FLAMMABILITY Self-
15、extinguishing(SAE J369) (SE)Burn Rate, max 100 mm/min3.5.5 ENVIRONMENTAL RESISTANCE No flowing, endlifting or lossof adhesion and 1 mm sag Test Method: Apply two 100 mm lengths of sealer material toa 300 x 300 mm electrocoated panel per para 5.4 (see figure1 for material placement). The cross-sectio
16、nal area of thesealer shall be specified on the applicable part drawing. Ifnone is specified, use 7 +/- 0.5 mm diameter material.Maintain the panel in a vertical position and subject it tothe exposures listed blow. Use one panel per exposure.Note: Tests shall also be conducted on substrates intended
17、for the part. i.e. ABS, polyproylene, aluminum, etc.3.5.7.1 30 minutes at 120 +/- 2 C3.5.7.2 2 weeks at 90 +/- 2 C3.5.7.3 Thermal/Humidity Cycling. 4 h at 90 +/- 2 C. 4 h at 38 +/- 2 C and 95 - 100 % relative humidity. 16 h at - 30 +/- 2 C. 4 h at 90 +/- 2 C. 4 h at 38 +/- 2 C and 95 - 100 % relativ
18、e humidity. 16 h at - 30 +/- 2 C3.5.7.4 2 weeks at 38 +/- 2 C and 95 - 100 % relativehumidity.ENGINEERING MATERIAL SPECIFICATIONWSB-M4G354-AWP 3948-b Page 4 of 7 3.5.8 WATER LEAK RESISTANCEEvidence of water leaks will be cause for rejection.Test Assembly Preparation: A test specimen, 275 mm in lengt
19、hsha ll be applied in a “U“ configuration to a 100 x 150 mmelectrocoated panel per para 5.4 (see Figure 2 for materialplacement). The cross- sectional area of the sealer shall bespecifi ed on the applicable part drawing. If none isspecified, use 7 +/- 0.5 mm diameter material. A 100 x 150 mmelectr o
20、coated panel per para 5.4 shall be placed over thesealer material. The assembly shall be compress ed 10 % usingspacers as a guide. The fixture must be clamped or bolted tomaint ain the 10 % compression throughout the environmentalexposures and test procedure.Expose 2 assemblies to each exposure cond
21、ition shown below:3.5.8.1 24 h at 23 +/- 2 C3.5.8.2 2 weeks at 90 +/- 2 C3.5.8.3 2 weeks at 38 C and 98 +/- 2 % RH3.5.8.4 Thermal Cycle(SAE J2100, para 4.8)3.5.8.5 30 minutes at 120 +/- 2 C (paint repair)3.5.8.6 2 weeks at -30 +/- 1 C3.5.8.7 500 h Salt Spray(ASTM B 117)Tes t Method: Remove the assem
22、blies from the environmentslisted above and condit ion for a minimum of 4 h but not morethan 24 h at 23 +/- 2 C . Stand the asembly on edge with theopening of the “U“ channle up. Fill the channel to a depth of100 mm (approximately 13 mm from the top edge) with coloredwa ter and let stand for 24 h. O
23、bserve for any evidence ofwa ter leaks. Note: Stand the test assembly on a sheet ofwhite paper for easier water leak detection.3.6 FUNCTIONAL APPROVALMaterials being evaluated for approval to this s pecification shall besubject ed to a production trial. Functional trial results must beapproved by th
24、e affected assembly operation and Design. Results shallbe made available to Materials Engineering prior to material approvaland release.ENGINEERING MATERIAL SPECIFICATIONWSB-M4G354-AWP 3948-b Page 5 of 7 3.7 ADDITIONAL REQUIREMENTSSpecific requirements for material and/or manufa ctured parts shall b
25、especified on the Engineering drawing, Engineerin g parts specificationand/or performance specification. All critical areas with respect tothese properties shall be clearly designated on the engineeringdrawing.3.8 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalen
26、t 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 suchchange s affect the materials ab
27、ility 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 code identification areto be s
28、ubmitted with the request.Substance restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in Engineering Materials Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior
29、approval 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 Engineerin
30、gactivity 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
31、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.5. G
32、ENERAL INFORMATIONThe information given below is provided for clarification and assistancein meeting the requirements of this specification.5.1 COLOR Amber5.2 SPECIFIC GRAVITY, TYPICAL 0.9 - 1.1(ASTM D 297)ENGINEERING MATERIAL SPECIFICATIONWSB-M4G354-AWP 3948-b Page 6 of 7 5.3 SOFTENING POINT, TYPICAL 105 - 1355.4 SUBSTRATESElectrocoated primed st eel panel: Prepared per ESB-M2P4 performancespecification. Use current production paints as identified by theBody Engineering Office.ENGINEERING MATERIAL SPECIFICATIONWSB-M4G354-AWP 3948-b Page 7 of 7
