1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1993 05 03 EP00E10258815000 Added -A2 and revised 3.5 W. Scholz1991 03 01 C01089482000 Released W.Scholz Conc. J. SchultWP 3948-a Page 1 of 5 SEALER, POLYURETHANE, SOLVENT RELEASE, INACTIVE ESK-M4G2
2、45-AAIR DRYINGSEALER, POLYURETHANE, SOLVENT RELEASE,AIR DRYING ESK-M4G245-A21. SCOPEThe material defined by this specification is a solvent release onecomponent sealer based on polyurethane. It cures at room temperature inthe presence of moisture.2. APPLICATIONThis specification was released origina
3、lly for dealer repair shops for therepair of interior and exterior body joint seams. The material is to beapplied to dry, grease free and primed surfaces. After applicationcondition for at least 5 h at 23 +/- 2 C and 50 +/- 5 % relative humidity(based on an application thickness of max 3 mm) prior t
4、o painting.3. REQUIREMENTSNoteUnless otherwise specified usea) EC-coated test panels according to FLTM BI 120-01C andb) test panels prepared according to FLTM BI 103-02, Method Bb, exceptonly EC-coated and spray primer.3.1 STATISTICAL PROCESSSuppliers must conform to the requirements of Ford Quality
5、 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 reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMA
6、L 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 this initial approvalshall constitute the reference standard and shall be kept on file atthe designated material la
7、boratory. All samples shall produce IRspectra and thermograms that correspond to the reference standardwhen tested under the same conditions.NOT TO BE USED FOR NEW DESIGN2014 N Status A2 no replacement L . Sinclair, NAENGINEERING MATERIAL SPECIFICATIONINACTIVE ESK-M4G245-A ESK-M4G245-A2WP 3948-b Pag
8、e 2 of 5 3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on ma terial conditioned ina control 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 FLASH P
9、OINT above 25 C(ASTM D 56)3.5 COLOUR A: whiteA2: black3.6 SOLIDS, min 82 %(FLTM BV 150-10)3.7 ASH, MAX 14 %(FLTM BV 150-10)3.8 DENSITY AT 23 C 1.15 - 1.25 kg/L(ASTM D 1475)3.9 VISCOSITY AT 23 C(FLTM BV 103-01, nozzle 2 mm diameter,pressure 2.8 bar)3.9.1 As Received 80 - 120 s3.9.2 After Ageing, max
10、140 s(14 d at 30 +/- 2 C)3.10 FLOW RATE AT 23 +/- 2 c no sagging(FLTM B V 153-01 A/B, Method A, test specimen prepared according tosection 3, Note. Test immediately after material application for 1h)3.11 COLD FLEXIBILITY AFTER AGINGNo cracking, no loss of adhesion, no chipping or blistering.Test Met
11、hod1. Apply 280 x 30 x 2 mm ribbons of material under test to 300 x 100x 0.8 - 0.9 mm test panels prepared according to clause 3., Note.2. Expose test specimens after 24 h at 23 +/- 2 C in a mechanicallyconvected airdry oven at 70 +/- 2 C for 120 h.3. After cooling to RT expose test assemblies and b
12、ending fixture(see FLTM BV 153-04, except 100 mm mandrel) in a cold box at -40+/- 1 C for 4 h.4. While still in the cold box bend test assemblies within 2 saround the 100 mm mandrel through an angle of 90 deg.ENGINEERING MATERIAL SPECIFICATIONINACTIVE ESK-M4G245-A ESK-M4G245-A2WP 3948-b Page 3 of 5
13、3.12 ENVIRONMENTAL CYCLING TEST AFTER AGINGNo cracking, no separation from substrateTest Method1. Prepare test specimens according to clause 3.11, section 1 and2 of test method.2. After 24 h at 23 +/- 2 C the test specimens shall be subjectedthree times to the following cycle:16 h at 98 +/- 2 % RH a
14、nd 38 +/- 2 C4 h at -40 +/- 2 C4 h at 80 +/- 2 C 3. Evaluation according to FLTM BV 153-03, mandrel diameter 100 mm,angle of 90 deg within 2 s.3.13 PAINTABILITYNo staining, discoloura tion or other deleterious effect on the paintafter exposure to each of the following exposures:a) Fluorescent Sunlam
15、p, min 500 h(FLTM BU 152-02)b) Florida Exposure, min 12 months(5 deg facing south, Miami, Florida)Specimen Preparation1. Apply 280 x 30 x 3 mm ribbons of sealer under test to 300 x 100x 0.8 - 0.9 mm test panels prep ared according to FLTM BI 120-01Cand FLTM BI 103-02, Method B.2. Conditio n for at l
16、east 5 h at room temperature and paint usingapproved/released repair paint systems.3. Condition for 24 h at room temperature and expose as specifiedunder a) and b) above.3.14 BRIDGINGThe material shall bridge a distance of 4 mm. The sagging heightshall not exceed 3 mm.Test Method1. Apply a bead of m
17、aterial under test 5 mm in diameter to a testfixture as outlined in FLTM BV 153-05 (treated in accord ance withFLTM BI 103-2C, EC-coated) and condition for 24 h at 23 +/- 2 C.2. Dismantle the test assembly and measure the sagging heig ht in mm.ENGINEERING MATERIAL SPECIFICATIONINACTIVE ESK-M4G245-A
18、ESK-M4G245-A2WP 3948-b Page 4 of 5 3.15 WATER ABSORPTION, max 2 %(FLTM BV 153-07 substitute heat treatment by 48 h at RT)3.16 SHEAR STRENGTH AT 23 +/- 2 C, min 0.5 MPa(FLTM BV 154-03, Method B, preparation of specim en in accordance withsection II, coating thickness x = 2 mm.Substitute heat treatmen
19、t by 48 h at 23 +/- 2 C)3.17 PEEL STRENGTH AT 23 +/- 2 C, min 40.0 N/cm(FL TM BV 154-03, Method C, preparation of specimen according tosection II, coating thickness x = 2 mm.Substitute heat treatment by 48 h at 23 +/- 2 C)3.18 STORAGE STABILITY(from date of receipt at FMC)Min 6 months when stored be
20、tween 5 C and 32 C in unopened drums outof direct sunlight.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 changes in the properties, composition,co nstr
21、uction, color, processing or labelling 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 affected Materials Engineering activity of the
22、 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 request.Substance restrictions imposed by law, regulations or Ford isapplic able to the materials defined in Engineering MaterialS
23、pecification WSS-M99P9999-A1, unless a differen t suffix (e.g., A2 orA3) is specified on the engineering document for the application.3.20 QUALITYThe material shall be of uniform quality free from foreign materialand pro perties detrimental to normal production use. It shall notcause excessive soili
24、ng of handlers in normal production use.ENGINEERING MATERIAL SPECIFICATIONINACTIVE ESK-M4G245-A ESK-M4G245-A2WP 3948-b Page 5 of 5 4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresp onsible Materials Engineering activity. Suppliers desiring approvalo
25、f thei r materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the supplier shall sub mit to the specification (test results, 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.
