1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Released1994 04 11 EP00E10395515000 Released K.WoltersWP 3948-a Page 1 of 5 PRIMER, WATERBASED, ONE PACK, PLASTIC SUBSTRATES WSK-M6J174-A1. SCOPETh e material defined by this specification is a water based primer f
2、orplastic substrates.2. APPLICATIONThis specification was released originally for material used as primer forvarious exterior applications such as radiator grilles, body side moldings,filler flaps etc., made from po lyamide, polycarbonate, ABS etc. The primercan be painted with two pack to p coat sy
3、stems and solvent based as well aswater based basecoats.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStand ard Q-101. A mutually acceptable Control Plan as describedtherein is required for material/source approval. Appropriatestatist ical to
4、ols 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 analysis of material/parts supplied to this specification.The IR
5、 spectra and thermograms established for i nitial approval shallconst itute the reference standard and shall be kept on file at thedesignated material laboratory. All samples sha ll produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 C
6、ONDITIONINGAll 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 COMPOSITION3.4.1 Resin: Water based synth
7、etic resins.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J174-AWP 3948-b Page 2 of 5 3.4.2 Pigments: Pigments to obtain the desiredproperties of the primer.3.5 PHYSICAL PROPERTIES3.5.1 Nonvolatile See Initial Sample +/- 1 %(FLTM BI 102-01) min 50 %The no nvolatile content shall be determined at a sprayvi
8、scosity of 30 s according to para 3.5.4.3.5.2 Density See Initial Sample +/- 0.05 g/mL(ASTM D 1475)3.5.3 Viscosity as supplied See Initial Sample +/- 10 s(FLTM BI 111-01, FC# 4)3.5.4 Spray Viscosity As specified by the supplier(FLTM BI 111-01, FC# 4)The material can be reduced with water.3.5.5 Organ
9、ic Solvent Content, max 5 %The content of organic solvents is defined as we ight per centof organic solvents at spray viscosity per 3.5.4.3.5.6 Storage Stability: 90 daysDuring a s torage at a temperature between 5 and 32 C thematerial as supplied shall not settle up or cake insoluble.Af ter the sto
10、rage the material must pass all specificationrequirements.3.6 PREPARATION OF TEST PANELS3.6.1 Substrate (see also para 5.1)Pol ycarbonate, polyurethane, polyamide, ABS or PP/EPDM assp ecified on Engineering Drawing. Test panels shall have asmooth surface.3.6.2 Plastic PreparationThe surface to be pa
11、inted shall be cleaned by an acceptableprocess to remove mold releasing agents, fingerprints, oils,dirt and moisture.3.6.3 Primer application (see also 5.2)Film Thickness 2 0 - 25 micrometre(FLTM BI 117-01)Flash Off 5minutes/RTBaking 20 minutes/80 CENGINEERING MATERIAL SPECIFICATIONWSK-M6J174-AWP 39
12、48-b Page 3 of 5 3.6.4 Topcoat (see also 5.3)Application of current approved top coat systems forplast ics, film thickness and baking as specified in therelevant material specifications.3.6.5 AgeingTest panels prepared under this specification shall be agedfor at least 72 h at 23 +/- 2 C or 16 h at
13、45 +/- 1 C beforetesting for resistance properties.3.7 APPEARANCE (Primer only)3.7.1 Colour (primer only) Visual conformance with theIn itial Sample within acceptabletolerance3.7.2 Gloss Matte3.8 RESISTANCE PROPERTIESTest panels and painted plastic parts according to para 3.6 of thisspecification sh
14、all meet the requirements of performancespecification WSK-M2P143-A.Primed plastic parts per para 3.6.3 shall meet the requirements ofperformance specification WSK-M2P164-A.3.9 SANDINGThe cured primer can be sanded manually at room temperature in caseof spot repair.3.10 QUALITYThe primer must be adap
15、table for application in accordance with theappr opriate Ford Motor Company Process Specification. The primermust be compatible with all related materials, e.g. substrate,topcoats, etc.3.11 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inal l characteristics
16、 to the material upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J174-AWP 3948-b Page 4 of 5 Pr ior to making any changes in the properties, composition,co nstruction, color, processing or labelling of the materialorig inally approved under this specification, wheth
17、er 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. Test data, test sam
18、ples 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 WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMat erials de
19、fined by this specification must have prior approval by theresp onsible Materials Engineering activity. Suppliers desiring approvalof thei r materials shall first obtain an expression of interest from theaffec ted Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall
20、 submit to the affected Materials Engineeringactivity a completed copy of their laboratory 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 mate
21、rial designation a nd code number, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on its performance to this specification and on anassessment of suitability for i ntended processes and/or applications. Uponapprov al, the material will be added to the
22、Engineering Material ApprovedSource List.5. GENERAL INFORMATIONThe information given below is provided for assistance and clarificationand does not represent requirement(s) to this specification.5.1 PRETREATMENTFor Polypropylene Substrates a pretreatment is necessary prior topainting to provide suff
23、icient paint adhesion.The nec essary pretreatment is determined by the type of substratematerial and the facilities in the plant. Recommended pretreatmentsare Adhesion primer or Flame process/Plasma treatment.5.2 FILM THICKNESSThe film thickness needed in production is depending on the surfaceof the
24、 part and may be increased to maximum 80 micrometre. Ifap plied in higher film thickness, flash off as well as dryingconditions of the primer must be adapted to that higher film build.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J174-AWP 3948-b Page 5 of 5 5.3 ALTERNATE TOP COAT SYSTEMThe primer may also
25、 be painted with top coat systems for vehiclebodies, e.g. if used on filler flaps made from polyamide.5.4 DENSITY OF THE DRY FILM See Initial Sample +/- 0.05 kg/L(FLTM BI 154-02)5.5 MATERIAL REFERENCEAll related materials and processes used for approval of primeracco rding to this specification, e.g. topcoat, pretreatment andplast ic substrates as well as the application parameter shall benoted in the Initial Sample Report of the primer.
