1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1988 12 09 CAS1-CR179821 ReleasedWP 3948-a Page 1 of 7SEALER, HIGH HEAT EXPANSION PERFORMANCE ESB-M18P11-AREQUIREMENT1. SCOPEThe material defined by this specification is an uncured elastomericmater
2、ial which expands upon exposure to heat, and can be used attemperatures ranging from 8 min at 171 C to 30 min at 218 C. Thismaterial is normally in die cut or extruded form. This material can besupplied with or without a pressure sensitive adhesive coating or arelease liner.2. APPLICATIONThe specifi
3、cation was released originally for material used in the bodyshop area for sealing openings in sheet metal areas.The material can be supplied with or without an aggressive pressuresensitive adhesive which promotes adhesion to oiled CRLC steel,galvanized steel and steel-sheet, zinc rich primer coated
4、substrates.This sealer has good phosphate wash resistance properties. The materialexpands during the electrocoat bake schedules noted per para 5.3.Materials meeting this performance specification are identified on theCorporate Approved Source List.Compliance with this performance specification does
5、not guarantee thesealer will function for all potential applications on a vehicle. Thespecific design condition should be evaluated by Car Engineering NVH foracoustical properties and a plant trial or laboratory simulation prior torelease of this material.3. REQUIREMENTS3.1 STATISTICAL PROCESSSuppli
6、ers 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
7、reduced.3.2 INFRARED SPECTROPHOTOMETRY 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 thermograms established for initial approvalshall constitute the reference standard and sha
8、ll be kept on fileat the designated material laboratory. All samples shall produceIR spectra and thermograms that correspond to the referencestandard when tested under the same conditions.ENGINEERING MATERIAL SPECIFICATION ESB-M18P11-AWP 3948-b Page 2 of 73.3 CONDITIONINGAll test values indicated he
9、rein are 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.3.4 DIMENSIONS As specified on engineeringdrawing and/or in trim and SealerManual3.5 VOLUME EXPANSION, min(FLTM BV
10、8-2)3.5.1 At 171 C 300 %3.5.2 At 205 C 300 %3.6 WATER ABSORPTION, max(FLTM BV 17-1, Method A (8 h soak time)material cure temperatures per para 3.5) 5 %3.7 BRIDGING, max 2.5 mmTest Method: Position a 150 mm length strip of material over theholes in the fixture shown below. Prepare two assemblies and
11、condition at 23 +/- 2 C for 1 h. Subject one assembly to eachmaterial cure schedule per para 5.3.ENGINEERING MATERIAL SPECIFICATION ESB-M18P11-AWP 3948-b Page 3 of 73.8 EXPANSION, min 300 %Test Method:. Prepare six test assemblies as shown in Fig 1. Use 1.0 - 1.1 mmCRLC steel oiled. Cure three sampl
12、es at each of the bake schedules indicated inpara 5.3. Allow samples to cool to 23 +/- 2 C for 1 h minimum. Calculate the percent expansion as the relationship between themaximum expanded thickness of the cured material (dimension “X“- Fig 1) and the uncured thickness of the original sample (“T“).X
13、- TPercent Expansion = x 100T. Using a hot knife disassemble test samples by cutting the curedsealer along the surface of panel A - Fig 1. The cured sealershall be resilient to the touch and exhibit a uniform cellstructure.3.9 ADHESION CHARACTERISTICSTest Method: Apply two 200 mm length ribbons of m
14、aterial to eachof two 0.89 x 100 x 300 mm steel panels per para 5.3 and conditionpanels at 23 C +/- 2 C for 1 h. Bake one panel at each materialscure schedule per para 5.3. Position panels in a horizontalattitude during material bake. After bake, condition panels at 23+/- 2 C for 4 h min. Evaluate a
15、dhesion by inserting the top of asharp spatula under the end of the material strip. Grasp the tabof sealer and attempt to peel at 180 deg.The material shall not be removable in a continuous coherent film.Observe for any indication that the material fails to adhere to thesubstrate or is brittle or fr
16、iable.3.10 COLD FLEXIBILITY No crackingTest Method:. Apply 150 x 9.5 x 9.5 mm length of uncured material to a sheetof aluminum foil or other non stick type surface material. Bake the material in a mechanical convection oven for 8 min at135 +/- 3 C metal temperature and 30 min at 205 +/- 3 C metaltem
17、perature.ENGINEERING MATERIAL SPECIFICATION ESB-M18P11-AWP 3948-b Page 4 of 7. Cool the material to 23 +/- 2 C for 4 h minimum and not morethan 24 h. Condition the material for 4 h at -29 and bend 190 deg around atemperature conditioned 24 mm diameter mandrel.3.11 CORROSION RESISTANCE, min 500 h(AST
18、M B 117)Test Method:. Place 39 cm2 area section of uncured production material on eachof two 150 x 75 mm body steel panels. Cover the material withan identical steel panel and clamp in position for closecontact. Bake test panels in a mechanical convection oven for 8 min at135 +/- 3 C metal temperatu
19、re (one panel) and 30 min at 205 +/-3 C metal temperature (one panel). Remove clamps and subject the cured assemblies to 500 h saltspray. After exposure, pull panels apart, remove the materials, cleanthe panels with suitable solvent and examine sealed surfaces forevidence of corrosion.3.12 FLAMMABIL
20、ITY, max 100 mm/min(FLTM BN 24-2, without the lot sampling plan)3.13 FOGGING(FLTM BO 116-3)Fog Number, min 60 %Any fog film present shall be examined for the formation ofdroplets of coalescence into a clear film. Such conditions, ifpresent, shall be cause for rejection.3.14 ELECTROCOAT COMPATIBILITY
21、 Shall not contaminate electrocoatprimer bath or cause electrocoatfilm irregularities.3.15 WASH RESISTANCE(FLTM BV 16-1, Method A, No wash off1.5 mm material thickness)3.16 OZONE RESISTANCE, max Rating 0ENGINEERING MATERIAL SPECIFICATION ESB-M18P11-AWP 3948-b Page 5 of 73.17 ODORNo objectionable or
22、irritating odors, both at received and afterstorage.3.18 STORAGE STABILITYThe material shall be stored at temperatures below 41 C away fromall sources of heat and sunlight. Heat greatly accelerates aging.Under these storage conditions, the minimum shelf lift of thematerial shall be 6 months. When th
23、ese materials are stored attemperatures below 23 C, they shall be conditioned at roomtemperature prior to application. Adequate conditioning permitsthe material to obtain its optimum application properties.3.19 SPONGE AND CELL STRUCTURE AFTER CUREShall exhibit uniform cell structure with no large vo
24、ids. Anatural skin formation shall result from the cure cycle. Thesponge shall have good resilience under finger pressure.Test Method: Cross sectional observation of the sponge shall bemade by cutting through the skin and sponge mass of a curedspecimen. The sponge system shall be visually examined.3
25、.20 MATERIAL CONSISTENCYShall be a smooth, homogeneous mixture free from foreign materialsand properties detrimental to normal production operations.3.21 UNCURED ADHESION AND RELEASE PAPER REMOVALThe sealer shall adhere when hand applied to oily steel surfaces.The material shall be capable of having
26、 the release paper backingremoved without distorting the shape of the sealer.3.22 PACKAGINGThe material shall be supplied in sealed packages and materialblocking is not permitted during container shipping or storage.3.23 FUNCTIONAL APPROVALMaterials being evaluated for initial approval to thisspecif
27、ication shall be subjected to a production trial. Functionaltrial results should be available to design and materialengineering prior to material approval and release.3.24 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inall characteristics to the material up
28、on which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATION ESB-M18P11-AWP 3948-b Page 6 of 7Prior to making any change in the properties, composition,construction, color, processing or labeling of the materialoriginally approved under this specification, whether or not suchchanges af
29、fect 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. Test data, test samples and a new code identi
30、ficationare to be submitted with the request.Substance restrictions imposed by law, regulations or Ford, applyto the materials addressed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1,unless a different suffix (e.g., A2 or A3) is specified on thee
31、ngineering document for the application.4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior approval by theresponsible Materials Engineering activity. Suppliers desiring approvalof their materials shall first obtain an expression of interest from theaffected Purchasing, D
32、esign and Materials Engineering activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringactivity its own laboratory report to the specification (test results,not nominal values), the material designation and code number, and testspecimens for Ford evaluation. Upon appro
33、val, the material will be addedto the Engineering Material Approved Source List.5. GENERAL INFORMATIONThe information below is provided for clarification and assistance inmeeting the requirements to the specification.5.1 MECHANICAL CONVECTION OVENThe mechanical oven(s) used to cure the material shal
34、l be capableof obtaining 205 C metal temperature on body steel (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 precoated with M-99C47-A Mineral Oilat an application of approximately 0.2 cm3/m2.5.2.2 Galvanized steel (ES
35、B-M1A189-A): Surface precoated withM-99C47-A Mineral Oil at an application of approximately0.2 cm3/m2.5.2.3 Steel-sheet, zinc rich primer coated (EB-M1A217-B1/B2):Surface precoated with M-99C47-A Mineral Oil at anapplication of approximately 0.2 cm3/m2.5.3 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 SPECIFICATION ESB-M18P11-AWP 3948-b Page 7 of 7FIGURE 1 - EXPANSION TESTA) TEXT ASSEMBLY BEFORE CURE (1.0 - 1.1 MM CRLC STEEL-OILED)B) TEST ASSEMBLY AFTER CURE
