1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1990 10 19 NB00E10071915001 Released W. Curtiss E. Rezendes M. PerchardWP 3948-a Page 1 of 6 SEALER, POLYOLEFIN, HOT MELT, THERMOSETTING, ESB-M4G331-AEXTRUDED, NON-FLOW1. SCOPEThe material defined by this specifi
2、cation is an extruded hot meltthermosetting polyolefin based sealer which is non-flowable.2. APPLICATIONThis specification was released originally for materials used overelectrocoated steel to seal horizontal and vertical lap joints, such as onthe floor pan, and recessed joints such as quarter panel
3、 to rocker panel.It is suitable for use involving interior exposure and is paintable withtopcoat enamels presenting an acceptable appearance free from tackiness,checks and porosity. Slight yellow staining is acceptable. Not suitable forClass “A“ surfaces.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie
4、rs must conform to the requirements 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 r
5、educed.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISAll samples shall produce spectra or thermograms that correspond tothe reference standard when tested under the same conditions. Theinfrared spectra or thermograms established for initial approvalshall constitute the reference standard and
6、 shall be kept on file atthe designated material laboratory.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on materials conditionedin a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested under thesame
7、 conditions unless otherwise specified.NOT TO BE USED FOR NEW DESIGN 2014 N Status No replacement named L. Sinclair, NAENGINEERING MATERIAL SPECIFICATIONESB-M4G331-AWP 3948-b Page 2 of 6 3.4 HARDNESS, DUROMETER A 60 - 80(ASTM D 2240)3.4.1 As received3.4.2 Aged 72 h at 49 CThe ha rdness tolerance for
8、 any one supplier shall be +/- 5hardness units based on the recorded hardness va lue for theiroriginally approved production sample.3.5 SOLIDS, min 98 %(ASTM D 2046, except heat at 190 +/- 2 Cfor 3 h in a mechanical convection oven)3.6 ASH (Based on solids weight), max 50 %Test Method: Place the cru
9、cible containing the solids residue in acool muffle furnace. S lowly heat and maintain at 760 +/- 30 C for 1h, cool in desiccator and weigh.3.7 SPECIFIC GRAVITY 1.10 - 1.30(ASTM D 792)3.8 PAINT COMPATIBILITYNo tackiness or crackin g effects on light colored enamel as a resultof painting.Test Method:
10、. Apply an extruded section of material 150 x 25 x 1.5 - 2.0 mm tofour 75 x 225 x 0.89 mm electrocoated steel panels per para 5.3. Bake sample per para. 5.4.1. Cool to 23 +/- 2 C and examine. . Spray with currently released white (two panels) and light metallicenamels (two panels), and bake per para
11、 5.4. Use currently releasedenamels. Cool to 23 +/- 2 C and reexamine for any of the aboveconditions.3.9 FLOW PROPERTIES, max Vertical Horizontal1 mm 1 mmTest Method:. Apply an extruded section of sealer 150 x 25 x 1.5 - 2.0 mm totwo 300 x 300 x 0.89 mm electrocoated steel panels per para5.3. Prehea
12、t the panels for 15 minutes at 90 +/- 2 C prior tosealer application. This will heat stake t he sealer to the panel.Allow the panels to cool at 23 +/- 2 C for 30 minutes.ENGINEERING MATERIAL SPECIFICATIONESB-M4G331-AWP 3948-b Page 3 of 6 . Place the panels in a mechanical convection o ven for 15 min
13、utes at150 +/- 2 C. Place one panel in a vertical position with the 150 mmdimension of sealer in a horizontal attitude and the second panelin a horizontal position. Remove panels from oven, cool, and measure the increase indimension. Save panels for para 3.10.2.3.10 LOW TEMPERATURE RESISTANCE No cra
14、cking oradhesion failure3.10.1 Flexib ility: The sealer must withstand a 180 degree bendaround a 25 mm diameter mandrel at 23 +/- 2 C and - 30 +/- 2C.3.10.2 Adhesion: Place the panels prepared in para 3.9 in theslamming apparatus desc ribed in FLTM BV 101-02 and condition4 h at - 30 +/- 2 C. The pan
15、el shall be slammed a total ofsix times.3.11 REFLOW RESISTANCE No loss of adhesion or reflow afterfive cyclesTest Method: Apply an extruded section of sealer 150 x 25 x 1.5 -2.0 mm lon g on a 75 x 225 x 0.8 mm panel per 5.3 and bake per para5.4. Expose each sample for 5 cycles, each cycle consisting
16、 of:. 4 h at 90 +/- 2 C. 4 h at 38 +/- 2 C and 100 % R.H. 16 h at - 30 +/- 2 C. 4 h at 38 +/- 2 C and 100 % R.H. 4 h at 90 +/- 2 C. 16 h at - 30 +/- 2 C3.12 BRIDGING The material shall not separate orflow through gap.Sample Preparation:. Horizontal Bridging - Apply an extruded secti on of sealer 250
17、 x 40x 1.5 - 2.0 mm to tw o electrocoated test fixtures as in Figure 1.Electrocoat per para 5.3. Vertical Bridging - Apply an extruded section of sealer 150 x 50x 1.5 - 2.0 mm to tw o electrocoated test fixtures as in figure 2.Electrocoat per para 5.3.Test Method:. Bake the test assemblies according
18、 to the bak e schedules indicatedin para 5.4. Remove and evaluate for separation or gaps in the material. Somesagging of the material is permitted.ENGINEERING MATERIAL SPECIFICATIONESB-M4G331-AWP 3948-b Page 4 of 6 3.13 STORAGE STABILITYShall be stored below 41 C away from all sources of heat andsun
19、ligh t. Under these storage conditions, the shelf life of thematerial shall be three months. When these materials are stored attemperatures below 23 C, they shall be conditioned at R.T. prior toapplication. Adequate conditioning permits the m aterial to obtain itsoptimum application properties.3.14
20、FUNCTIONAL APPROVALMaterials being evaluat ed for initial approval to this specificationshall be subjected to a production functional trial. The functionaltrial results shall be available to design and material engineeringactivities prior to material approval and release.3.15 ADDITIONAL REQUIREMENTS
21、Specific requirements for material 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.3.16 SUPPLIERS RESPONSIBILI
22、TYAll 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 this sp
23、ecification, whether or not suchchange s affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing, Toxicology, andthe affected Materials Engineering activity of the proposed changesand obtain the written approval of the Materials Engineeringactivity. T
24、est data, test samples, and a new co de 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 WS S-M99P9999-A1, unlessa differe
25、nt suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.ENGINEERING MATERIAL SPECIFICATIONESB-M4G331-AWP 3948-b Page 5 of 6 4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Supp
26、liers desiring approval ofthe ir materials shall first obtain an expression of interest from theaffe cted Purchasing, Design, and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, si
27、gned 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 specimens for Ford evaluation. In addition to meeting therequi
28、rements of this specification, the materials will be assessed forsuita bility for intended applications as part of the approval process.Upo n approval, the material will be added to the Engineering MaterialApproved Source List.5. GENERAL INFORMATIONThe information given below is provided for clarifi
29、cation and assistancein meeting the requirements of this specification.5.1 COLOR Gray, black or as speci fied on theengineering drawing and/or thetrim and Sealer Manual.5.2 MECHANICAL CONVECTION OVENThe mechanical convection oven(s) used to cure the sealers shall becap able of obtaining a 177 +/- 3
30、C metal temperature on body steel(0.8 - 0.9 thickness) in 7 - 8 minutes and 135 + /- 3 C temperature in8 minutes.5.3 SUBSTRATESEle ctrocoat primed steel panel: Prepared per ESB-M2P4 performancespecification. Use current production paints as identified by theBody Engineering Office.5.4 OVEN TEMPERATU
31、RE SCHEDULE5.4.1 Minimum (Includes two bakes):First bake 8 m inutes at 135 +/- 1 C metaltemperatureSecond bake 8 m inutes at 120 +/- 1 C metaltemperatureplus3 m inutes at 130 +/- 1 C metaltemperature5.4.2 Maximum: 20 minutes at 177 +/- 1 C metaltemperatureENGINEERING MATERIAL SPECIFICATIONESB-M4G331-AWP 3948-b Page 6 of 6
