1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1990 02 14 NB00E00362773000 Released K. King E.R. RezendesWP 3948-a Page 1 of 6 SEALER, ELASTOMERIC TAPE FORM, HEAT EXPANDING, ESB-M4G311-AMAGNETIC1. SCOPEThe material defined by this specification
2、is an extruded tape from heatexpanding EPDM base magnetic sealer.2. APPLICATIONThis specification was released originally to seal horizontal and verticalinterior joints.It has an aggressive magnetic adhesive which promotes adhesion to oiledCRLC steel, galvanized steel and steel-sheet zinc rich prime
3、r coatedsubstrates. This sealer has good phosphate wash resistance properties. Thematerial expands during the electrocoat bake schedules noted per para 5.3.3. REQUIREMENTS3.1 STATISTICAL PROCESSSuppliers must conform to the requirements of Ford Quality SystemStandard Q-101. A mutually acceptable Con
4、trol 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 SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may
5、 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 thedesignated material laboratory. All samples shall produce IR spectraand the
6、rmograms 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 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testi
7、ng and tested under thesame conditions unless otherwise specified.NOT TO BE USED FOR NEW DESIGN2014 N Status No replacement named L. Sinclair, NAENGINEERING MATERIAL SPECIFICATIONESB-M4G311-AWP 3948-b Page 2 of 6 3.4 DIMENSIONS As specified on EngineeringDrawing and/or in Trim & SealerManual3.5 CONS
8、ISTENCY, mm 3 - 5(ASTM D 5, 150 g total weight, initial andafter material aged 72 h at 45 +/- 2 C)3.6 SOLIDS, min 95 %(ASTM D 2046, except heat at 102 +/- 2 Cfor 3 h in a mechanical convection oven) 3.7 ASH (based on solids weight), max 70 %Test Method: Place cru cible containing the solids residue
9、in a coolmuffle furnace. Slowly heat to and maintain at 760 +/- 30 C for 1 h,cool in desiccator, and weigh.3.8 SPECIFIC GRAVITY, min 1.75(ASTM D 297, Hydrostatic Method)Toler ance for any supplier shall be +/- 0.25 based on the recordedspecific gravity of his originally approved production sample.3.
10、9 VOLUME EXPANSION(FLTM BV 108-02)3.9.1 At 177 C 20 - 60 %3.9.2 At 205 C 60 - 120 %3.10 WATER ABSORPTION, max(FLTM BV 117-01)3.10.1 Method A Less than 2 %3.10.2 Method B Less than 2 %3.11 BRIDGING, max 2.0 mmTest Method: Position a 150 mm length strip of material over theho les in the fixture shown
11、below. Prepare two assemblies andcondition at 23 +/- 2 C for 1 h. Subject one assembly to eachmaterial cure schedule per para 5.3.ENGINEERING MATERIAL SPECIFICATIONESB-M4G311-AWP 3948-b Page 3 of 6 BRIDGING TEST FIXTURE 3.12 SAG RESISTANCE, max 2 mm(FLTM BV 118-01, substrate per para 5.2,material cu
12、re schedules per para 5.3)3.13 ADHESIONSha ll not be peeled off in a continuous film at any thickness whensubjected to the following environments.3.13.1 Normal, 24 h at 23 +/- 2 C3.13.2 Salt Spray 500 h(ASTM B 117)Sa mple Preparation: For each adhesion test exposure notedabove, prepare sample as fol
13、lows:. Apply four 200 mm length of ribbons of material on fouroily CRS panels prepared per para 5.2. Subject two test panels to the minimum bake schedule andthe t wo other test panels to the maximum bake scheduleidentified per para 5.3. Cond ition panels after baking at 23 +/- 2 C for 2 hminimum.Tes
14、t Method:. Subject test panels to exposure noted. Condition panels for a minimum of 24 h prior to e valuatingadhesion.ENGINEERING MATERIAL SPECIFICATIONESB-M4G311-AWP 3948-b Page 4 of 6 . Evaluate sealer adhesion to each test panel by making twoparallel cuts across ribbon of material. Cuts should be
15、through to metal and 25 mm apart. Check adhesion byinserting the tip of a squared spatula under the edge ofthe 2 5 mm wide section of material, and then attempt tohand peel sealer at a 90 degree angle to panel. Materialshould fail cohesively rather than delaminating cleanlyfrom substrate surface. Ob
16、serve for any evidence of corrosion and adhesion lossdirectly under material.3.15 RESISTANCE TO CORROSION 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. Apply t wo 200 mm length of ribbons of material
17、on four oily CRSpanels prepared per para 5.2. Subject two test panels to the minimum bake schedule and the twoother test panels to the maximum bake sched ule identified per para5.3. Condition panels after baking at 23 +/- 2 C for 2 h minimum.3.16 LOW TEMPERATURE RESISTANCE No cracking oradhesion fai
18、lureTest Method: Condition the panels prepared per p ara 5.3 for 7 days at70 +/- 2 C. Place the panels in the slamming apparatus described inFLTM BV 101-02 and cond ition for 4 h at - 29 C. The panels shall beslammed a total of 10 times.3.17 WASH RESISTANCE No wash off(FLTM BV 116-01, Method A, 1.5
19、mmmaterial thickness)3.18 ELECTROCOAT COMPATIBILITY Shall not contaminate electrocoat(FLTM BV 119-01) pr imer bath or cause electrocoatfilm irregularities3.19 ODORNo ob jectionable or irritating odors, both as received and afterstorage.3.20 UNCURED ADHESION AND RELEASE PAPER REMOVALTh e sealer shall
20、 adhere when hand applied to oily steel surfaces.Th e material shall be capable of having the release paper backingremoved without distorting the shape of the sealer.ENGINEERING MATERIAL SPECIFICATIONESB-M4G311-AWP 3948-b Page 5 of 6 3.21 PACKAGINGThe material shall be supplied in sealed packages an
21、d materialblocking is not permitted during container shipping or storage.3.22 STORAGE STABILITYShall be stored below 41 C away from all sources of heat andsunligh t. Under these storage conditions, the shelf life of themat erial shall be 3 months. When these materials are stored atte mperatures belo
22、w 23 C, they shall be conditioned at roomtemperature prior to ap plication. Adequate conditioning permits thematerial to obtain its optimum application properties.3.23 FUNCTIONAL APPROVALMaterials being evaluat ed for initial approval to this specificationshall be subjected to a production trial. Fu
23、nctional trial resultssho uld be available to design and material engineering prior tomaterial approval and release.3.24 MATERIAL CONSISTENCYShall be a smooth, homogenous mixture free from foreign materials andproperties detrimental to normal production operations.3.25 ADDITIONAL REQUIREMENTSSpecifi
24、c 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 clearly designated on the engineeringdrawing.3.26 SUPPLIERS RESPONSIBILI
25、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
26、ecification, 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 Engineeringactivity. T
27、est data, t est samples and a new code identification areto be submitted with the request.ENGINEERING MATERIAL SPECIFICATIONESB-M4G311-AWP 3948-b Page 6 of 6 Substance restrictions imposed by law, regulations or Ford, apply tothe materials addressed by this document. The restrictions aredefined in E
28、ngineering Material Specification 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. Suppl
29、iers 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 Engineeringactivity its own laboratory rep ort to the specification (test r
30、esults, notnominal values), the material 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 below is provided for clarification and assistance inmeeting t
31、he requirements of the specification.5.1 MECHANICAL CONVECTION OVENThe mechanical oven(s) used to cure the material shall be capable ofobtaining 204 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.5.2.1 CRLC
32、Steel: Surface pr ecoated with M-99C47-A Mineral Oil atan application of approximately 0.2 cm3/m2.5.2.2 Galv anized Steel (ESB-M1A189-A): Surface precoated withM-99C47-A Mineral Oil a t an application of approximately 0.2cm3/m2.5.2.3 Steel-sheet, zinc rich primer coated (ESB-M1A217-B1/B2):Su rface precoated with M-99C47-A Mineral Oil at anapplication of approximately 0.2 cm3/m2.5.3 MATERIAL CURE SCHEDULES5.3.1 Minimum 177 C metaltemperature for20 minutes5.3.2 Maximum 204 C metaltemperature for30 minutes
