1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1990-08-01 EP00E01031538000 Released KW conc. J.SchultWP 3948-a Page 1 of 5 PAINT, TWO PACK, PLASTIC SUBSTRATES, EXTERIOR WSK-M16J12-A1. SCOPEThe material defined by this specification is a flexible exterior pain
2、t forplastic substrates. It must be cured with a suitable isocyanate hardener.2. APPLICATIONThis spe cification was released originally for material used as two packpaint for various exterior applications such as radiator grilles, body sidemoldings, etc.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie
3、rs must conform to the requirements of Ford Quality SystemStanda rd Q-101. A mutually acceptable Control Plan as describedth erein is required for material/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in the final product is continuousl
4、y 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 spectra and thermograms established for i nitial approval shallconst itute the reference standard an
5、d shall be kept on file at thedesignated material lab oratory. All samples shall produce IR spectraand thermograms that correspond to the reference standard when testedunder the same conditions.3.3 CONDITIONINGAl l Tests according to this specification shall be performed in acontrolled atmosphere of
6、 23 +/- 2 C and 50 - 65 % relative humidityif not otherwise specified.3.4 COMPOSITION3.4.1 Resin: Synthetic polyhydroxy acrylicresins.3.4.2 Pigments: Pigments to obtain the desiredcolour and properties.ENGINEERING MATERIAL SPECIFICATIONWSK-M16J12-AWP 3948-b Page 2 of 5 3.4.3 Solvent Emissions see In
7、itial Sample +/- 1 %(ASTM D 3960)This 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 Non-volatile see Initial Sample +/- 1 %;(FLTM BI 102-01)The non volatile conten
8、t varies depending on the colour:Black and dark colours min 40 %Other colours min 48 %White min 56 %The n on-volatile content shall be determined at a sprayviscosity of 20 s according to 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 Sam
9、ple +/- 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 with Xylene (WSK-M14J239-A) andButyl acetate (WSK-M14J228-B).3.5.5 Mixing ratio as specified by the supplierThe material shall be cured with isocyanate hardenerWSK-M99J359-
10、A or WSK-M99J360-A.3.5.6 Dry Hiding Power, max 40 micrometre(FLTM BI 158-01)3.5.7 Storage Stability: 90 daysDuri ng a storage of 90 days between 5 and 32 C temperaturethe m aterial as supplied shall not settle up or cakeinsol uble. After the storage the material must pass allspecification requiremen
11、ts.ENGINEERING MATERIAL SPECIFICATIONWSK-M16J12-AWP 3948-b Page 3 of 5 3.6 PREPARATION OF TEST PANELS3.6.1 SubstrateABS, Polyamide, Polycarbonate or Polypropylene, etc. asrequired on Engineering Drawing.Note: PP/EPDM plastics must be primed with an ad hesion primerprior to painting.3.6.2 Plastic Pre
12、parationThe surface to be 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 Surfacer (if required)Application of a primer surfacer, film thickness and bakingas specified in the relevant material spec
13、ification.3.6.4 Topcoat applicationDry film thickness: 40 - 45 micrometreFlash off time: 5 minutes at room temperatureBaking: 20 minutes at 80 C or 5 minutes at 130 CAir drying at room temperature: 2 h tackfree, 24 h cured3.6.5 AgeingTest panels prepared under this specification shall be agedfor at
14、least 72 h at 23 +/- 2 C or 16 h at 45 +/- 1 C beforetesting for resistance properties.3.7 APPEARANCECol our, gloss, grain and surface finish shall match master TrimSample and/or Master Appearance Sample as approved by Design.3.7.1 Colour see MAS - Panel(FLTM BI 109-01)3.7.2 Gloss 85 %(FLTM BI 110-0
15、1, 60 deg)3.8 PENCIL HARDNESS, min. H(FLTM BI 151-01)ENGINEERING MATERIAL SPECIFICATIONWSK-M16J12-AWP 3948-b Page 4 of 5 3.9 RESISTANCE PROPERTIESTest Panels and plastic parts painted according to para 3.6 of thisspecification shall meet all requirements of performancespecification WSK-M2P143-A.3.10
16、 SANDING AND POLISHINGAfter curing, the painted surface can be sanded and polished manuallyat room temperature in case of repair.3.11 QUALITYThe top coat must be adaptable for application i n accordance with theappropriate Ford Motor Company Process Specification.The top coat must be compatible with
17、 all related materials.3.12 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 nstruction, color, processing or labelli
18、ng 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 proposed changesand obtain the writ
19、ten approval of the Materials 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 Materi
20、al Specification WS S-M99P9999-A1, unlessa different suffix (e.g., A2 or A3) is specified on the engineeringdocument for the application.4. APPROVAL OF MATERIALSMat erials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring app
21、roval ofthe ir materials shall first obtain an expression of interest from theaffect ed Purchasing, Design and Materials Engineering activity. Uponrequest, the supplier shall submit to the affected Materials Engineeringactivity its own laboratory rep ort to the specification (test results, notnomina
22、l values), the material designation and code number, and testspecimen s for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List. ENGINEERING MATERIAL SPECIFICATIONWSK-M16J12-AWP 3948-b Page 5 of 5 5. GENERAL INFORMATIONThe information given below is provided for assistance and clarificationand does not represent requirement(s) to this specification.5.1 DENSITY OF THE DRY FILM see Initial Sample +/- 0.02 kg/L(FLTM BI 154-02)
