1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1988 10 12 CZR1-DR211569 Released ERR/LWMWP 3948-a Page 1 of 8 SEALER, ELASTOMER BASED - HOT MELT EXTRUDED - ESB-M4G304-A HEAT CURING - HIGH FLOW - NON TACK1. SCOPEThe material defined by this specification is a
2、extruded E.V.A. based hotpaint melt sealer. This material has high flow characteristics during highbake cycles.2. APPLICATIONThe specification was released originally to seal horizontal and verticalinterior joints. This material can be applied in the body shop over oilyCRLC steel, zincrometal and ga
3、lvanized substrates.3. REQUIREMENTS3.1 STATISTICAL PROCESSSuppliers 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/pro
4、duct data sothat variation in the final product is continuously reduced.3.2 INFRARED SPECTROPHOTOMETER AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/orthermal analysis of material/parts supplied to this specification.The IR spectra and thermogram established for
5、initial approval shallconstitute the reference standard and shall be kept on file at thedesignated material laboratory. All samples shall produce IR spectraand thermogram that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONINGAll Test values indicated herein a
6、re based on materials conditionedin a controlled atmosphere of 23 +/- 2 C and 50 +/- 5% relativehumidity for 24 h prior to testing and tested under the samecontrolled conditions.NOT TO BE USED FOR NEW DESIGN2014 N Status No replacement named L. Sinclair, NAENGINEERING MATERIAL SPECIFICATIONESB-M4G30
7、4-A WP 3948-b Page 2 of 8 3.4 DIMENSIONS As specified on engineering drawingand/or in trim any sealer separation willconstitute a failure.3.12 ADHESIONSha ll not be peeled off in a continuous film at any thickness whensubjected to the following environments.3.12.2 Normal, 24 h at 23 +/- 2 C3.12.2 Sa
8、lt Spray 500 hrs(ASTM B 117)Sa mple Preparation: For each adhesion test exposure notedabove, prepare sample as follows:. Heat stake a 6 mm di a. bead along the center line of fouroily CRS panels prepared per Para 3.11 and Para 5.2. Subject two test panels to the minimum bake schedule andthe two othe
9、r test panels to the maximum bake scheduleidentified per Para 5.3. Condition panels after backing at 23 +/- 2 C for 2 hminimum.Test Method:. Subject test panels to exposure noted. Condition panels for a minimum of 24 h prior to evaluatingadhesion. Evaluation sealer adhesion to each test panel by mak
10、ing twoparallel cuts across ribbon of material. Cuts should bethrough to metal and 25 mm apart. Check adhesion byinserting the tip of a squared spatula under the edge ofthe 25 mm wide section of material, and then attempt tohand peel sealer at a 90 deg angle to panel. Materialshould fail cohesively
11、rather than delaminating cleanlyfrom substrate surface. Observe for any evidence of corrosion and adhesion lossdirectly under material.ENGINEERING MATERIAL SPECIFICATIONESB-M4G304-A WP 3948-b Page 5 of 8 3.13 BRIDGINGThe material must satisfactorily bridge metal to glass and metal tometal when subje
12、cted to the following environments.3.13.1 Normal, 24 h at 23 + /- 2 C (metal to glass)3.13.2 Salt Spray 500 h (metal to metal)(ASTM B 117)SAMPLE PREPARATION: Metal to glass and metal to metal test panels. Insert a 6mm dia. x 152 mm sealer bead betwee n the glass and metalsurface as shown in Figure 1
13、. Scribe each panel to mark the material locations. Immediately after scribing, position 4 panels in the horizontalattitude at 53 degrees. Subject two test pan els, to the minimum bake schedule and the twoother test panels to the maximum bake schedule identified per Para.5.3. Condition panels after
14、baking at 23 + 2 C for 2 h minimum. Prepare metal to metal test panels as required above.TEST FIXTURE ASSEMBLYENGINEERING MATERIAL SPECIFICATIONESB-M4G304-A WP 3948-b Page 6 of 8 Test Method. Subject test panels to exposures noted. Condition panels for a minimum of 24 h prior to evaluatingbridging.
15、Observe for any evidence of gapping, corrosion and adhesion lossdirectly under material.3.14 LOW TEMPERATURE RESISTANCE No cracking oradhesion failureTest Method: Condition the panels prepared in p ara 5.3 for 7 days at70 +/- 2 C. Place the panels in the slamming apparatus described inFL TM BV 1-2 a
16、nd condition for 4 h at -29 C. The panels shall beslammed a total of 10 times.3.15 WASH RESISTANCE No wash-off(FLTM BV 16-1, Method “A“ 1.5 mmmaterial thickness)3.16 ELECTROCOAT COMPATIBILITY Shall not contaminate electrocoat(FLTM BV 19-1) primer bath or cause electrocoat film irregularities3.17 STO
17、RAGE STABILITYThe material shall be stored at temperatures bel ow 41 C away from allsources of heat and sunlight. Heat greatly 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 s
18、hall be condition at room temperature prior toapplication. Adequate conditioning permits the m aterial to obtain itsoptimum application properties.3.18 FUNCTIONAL APPROVALMaterials being evaluat ed for initial approval to this specificationshall be subjected to a production trial. Functional trial r
19、esultssho uld be available to design and material engineering prior tomaterial approval and release.3.19 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics to the material upon which approval wasoriginally granted.Pr ior to making any chang
20、es 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 specificationrequir ements, the Supplier shall notify Purchasing, Toxicology andthe affect
21、ed 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 requestENGINEERING MATERIAL SPECIFICATIONESB-M4G304-A WP 3948-b Page 7 of 8 Substance rest
22、rictions 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 dif ferent suffix (e.g, A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF SUPP
23、LIERSSupplier s to this specification must be approved by the affected productengineering office. Procedure for gaining approval of a specific materialto a ne w/existing ES-M specification is contained in supplier ProcedureI-A. Appr oved new suppliers will be added to the Engineering Materialsapprov
24、ed Source List.5. GENERAL INFORMATIONThe in formation below is provided for clarificationand admittance inmeeting the requirements to the specification.5.1 MECHANICAL CONVECTION OVENThe mechanical oven(s) used to cure the material shall be capable ofobta ining 205 C metal temperature on body steel (
25、0.8-0.9 mmthickness) within 8-10 min.5.2 SUBSTRATESNominal panel dimensions are 0.8 x 100 x 300 mm5.2.1 CRLC Steel: Surface pr ecoated with M-99C47-A Mineral Oil atan application of approximately 0.2 cm3/ft2.5.2.2 Galv anized steel (ESB-M1A189-A): Surface precoated withM-99C47-A Mineral Oil a t an a
26、pplication of approximately 0.2cm3/ft2.5.2.3 Steel-sheet, zinc rich primer coated (EB-M1A217-B1/B2):Su rface precoated with M-99C47-A Mineral Oil at anapplication of approximately 0.2 cm3/ft2.5.3 MATERIAL CURE SCHEDULES5.3.1 Minimum, 171 C metal temperature for 8 min.5.3.2 Maximum, 205 C metal temperature for 30 min.ENGINEERING MATERIAL SPECIFICATIONESB-M4G304-A WP 3948-b Page 8 of 8 F I G U R E I S.A.E. J403 1029 STEEL
