1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1991-06-03 EP00E01089485000 Released KWWP 3948-a Page 1 of 5 PAINT, WATERBASED, BASECOAT, LOW BAKE, METALLIC WSK-M62J30-A1PAINT, WATERBASED, BASECOAT, LOW BAKE, NONMETALLIC WSK-M62J30-A21. SCOPEThe
2、ma terials defined by these specifications are waterbased one pack lowbake basecoats for 90 C baking temperature. They must be coated with anadditional clear coat.2. APPLICATIONThese s pecifications were released originally for materials used as twocoat basecoat on primed plastic bumpers. The materi
3、als m ay also be used forother exterior plastic applications such as radiator grilles or body sidemoldings, (see 5.1).3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStanda rd Q-101. A mutually acceptable Control Plan as describedth erein is re
4、quired for material/source approval. Appropriatestatist ical 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 conduct infrared and/ortherma l a
5、nalysis of material/parts supplied to this specification.The IR spectra and thermograms established for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignated material lab oratory. All samples shall produce IR spectraand thermograms that correspond to th
6、e reference standard when testedunder the same conditions.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
7、conditions unless otherwise specified.3.4 COMPOSITION3.4.1 Resin Water based synthetic resins.3.4.2 Pigments Pigments to obtain the desiredcolour and properties.ENGINEERING MATERIAL SPECIFICATIONWSK-M62J30-A1/A2WP 3948-b Page 2 of 5 3.4.3 Solvent Emissions See Initial Sample +/- 1 %(ASTM D 3960)This
8、 r equirement is as determined by the United StatesEnvironmental Protection Agency Reference Method #24 and isonly applicable to materials used in the USA.3.5 MATERIAL PROPERTIES3.5.1 Nonvolatile See Initial Sample +/- 1 %(FLTM BI 102-01)WSK-M62J30-A1, min 16 %WSK-M62J30-A2, min 20 %The nonvolatile
9、content shall be determined at sprayviscosity of 35 s per para 3.5.4.3.5.2 Density See Initial Sample +/- 0.02 g/mL(ASTM D 1475)3.5.3 Viscosity as supplied See Initial Sample +/- 5 s(FLTM BI 111-01)3.5.4 Spray Viscosity As specified by the supplier(FLTM BI 111-01, FC #4)The material can be reduced w
10、ith deionized water.3.5.5 Organic Solvent Content, max 17 %The content of organic solvents is defined as:Weight-% of organic solvents at spray viscosity.3.5.6 Dry Hiding Power(FLTM BI 158-01)WSK-M62J30-A1, max 15 micrometreWSK-M62J30-A2, light red, max 40 micrometreWSK-M62J30-A2, other colours, max
11、25 micrometre3.5.7 Storage Stability 90 daysDuring the storage between 5 and 32 C temperature, thematerial as supplied shall not settle up or cake insoluble.Af ter the storage the material must pass all specificationrequirements.ENGINEERING MATERIAL SPECIFICATIONWSK-M62J30-A1/A2WP 3948-b Page 3 of 5
12、 3.6 PREPARATION OF TEST PANELS3.6.1 Substrate (see also 5.1)Polycarbonate, polyurethane, polypropylene as specified onEngineering Drawing; test panels shall have smooth surface.Note: PP/EPDM plastics must be primed with an ad hesion primerprior to painting.3.6.2 Plastic PreparationThe surface to be
13、 painted shall be cleaned by an acceptablepr ocess, e.g. power wash, to remove mold releasing agents,fingerprints, oils, dirt and moisture.3.6.3 Primer (if required, see also 5.1)App lication of a high flexible primer; film thickness andbaking as specified in the relevant Material Specification.3.6.
14、4 Basecoat ApplicationWSK-M62J30-A1 WSK-M62J30-A2Dry film thickness 12 - 18 25 - 30micrometre micrometreFlash off atroom temperature 3 minutes 3 minutesfollowed by 80 Cwith air ventilation 5 - 6 minutes 5 - 6 minutes3.6.5 Clearcoat (see also 5.1)Application of a high f lexible clearcoat; film thickn
15、ess andappli cation as specified in the relevant MaterialSpecification.Baking 25 minutes at 90 C (min imum objecttemperature)Note: This condition s upersedes deviating requirements fromClearcoat Material Specification.3.6.6 Ageing (see also 5.1)Test panels prepared under this specification shall be
16、agedfor at least 72 h at 23 +/- 2 C or 16 h at 45 +/- 1 C beforetesting for resistance properties.ENGINEERING MATERIAL SPECIFICATIONWSK-M62J30-A1/A2WP 3948-b Page 4 of 5 3.7 APPEARANCECol our, gloss, grain and surface finish shall match master TrimSample and/or Master Appearance Sample as approved b
17、y Design.3.7.1 Colour, in combination with clear coat See MAS - Panel(FLTM BI 109-01)3.7.2 Gloss, in combination with clear coat, min 90 %(FLTM BI 110-01, 60 deg)3.8 RESISTANCE PROPERTIES (see also 5.1)Te st panels and plastic parts prepared according to 3.6 of thisspecification shall meet all requi
18、rements of PerformanceSpecification WSK-M2P145-A.3.9 QUALITYThe basecoat must be adaptable for application i n accordance with theappropriate Ford Motor Company Process Specification.The b asecoat must be compatible with all related materials, e.g.primers, clearcoat, substrate, adhesives, etc.3.10 S
19、UPPLIERS 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 nstruction, color, processing or labelling of the materialorig inally
20、 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 proposed changesand obtain the written approval of the Materials
21、 Engineeringactivity. Test data, test samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford apply tothe mat erials addressed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P999
22、9-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.ENGINEERING MATERIAL SPECIFICATIONWSK-M62J30-A1/A2WP 3948-b Page 5 of 5 4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials En
23、gineeri ng activity. Suppliers 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 a completed copy of their lab
24、oratory test reports, signed 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, andtest specimens for Ford evaluation. In additi
25、on to meeti ng the requirementsof thi s specification, the materials will be assessed for suitability forintended applications as part o f the approval process. Upon approval, thematerial will be added to the Engineering Material Approved Source List.5. GENERAL INFORMATIONThe information given below
26、 is provided for assistance and clarificationand does not represent requirement(s) to this specification.5.1 ALTERNATE PAINT SYSTEMBaseco at according to this specification may also be used incombination with flexible paint systems accordin g to WSK-M2P143-A forother e xterior parts such as radiator
27、 grilles, mirrors, body sidemoldings, etc. made from ABS, PA etc.If used for these applications, flash off, baking and agingconditions must be adapted to that paint system.Test p anels and painted parts shall meet the requirements ofPerformance Specification WSK-M2P143-A then.5.2 DENSITY OF THE DRY
28、FILM See Initial Sample +/- 0.02 kg/L(FLTM BI 154-02)5.3 pH - VALUE See Initial Sample +/- 0.55.4 MATERIAL REFERENCEAll related materials used for approval of basec oat according to thisspecification, e.g. clearcoat, primer or plastic substrates, shall benoted in the Initial Sample Report of the basecoat.
