1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1990-08-01 EP00E01031538000 Released KW conc. J.SchultWP 3948-a Page 1 of 5 PRIMER, TWO PACK, PLASTIC SUBSTRATES WSK-M6J163-A1. SCOPEThe mate rial defined by this specification is a primer for plast
2、icsubstrates. It must be cured with a suitable isocyanate hardener.2. APPLICATIONThis spe cification was released originally for material used as two packprimer for various exterior applications such as radiator grilles, bodyside moldings, etc., made from Polyamide, Polycarbonate, ABS, chrome plated
3、ABS, e tc., prior to the application of top coats. The primer is suitablefor us e with solvent based solid colour topcoats and with water based aswell as solvent based basecoats in combination with clearcoat.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Qu
4、ality 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 continuously reduced.3.2 INFRARED SPECTROPHOTOMETRY AND/O
5、R 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 and shall be kept on file at thedesignated mater
6、ial 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 23 +/- 2 C and 50 - 65 % relative humidityif
7、not otherwise specified.3.4 COMPOSITION3.4.1 Resin: Synthetic polyhydroxy acrylicresins.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J163-AWP 3948-b Page 2 of 5 3.4.2 Pigments: Pigments to obtain the desiredcolour and properties.3.4.3 Solvent Emissions see Initial Sample +/- 1 %(ASTM D 3960)This r equire
8、ment 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) min. 55 %The n on-volatile content shall be determined at a sprayvis
9、cosity of 25 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 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 with Xylene (WSK-M14J239-A) and
10、Butyl acetate (WSK-M14J228-B).3.5.5 Mixing Ratio as specified by the supplierThe material shall be cured with isocyanate hardenerWSK-M99J359-A or WSK-M99J360-A.3.5.6 Dry Hiding Power, max. 20 micrometre(FLTM BI 158-01)3.5.7 Storage Stability: 90 daysDuri ng a storage of 90 days between 5 and 32 C te
11、mperaturethe m aterial as supplied shall not settle up or cakeinsol uble. After the storage the material must pass allspecification requirements.3.6 PREPARATION OF TEST PANELS3.6.1 SubstrateABS, Polyamide, Polycarbonate or Polypropylene as specifiedon Engineering Drawing.Note: PP/EPDM plastics must
12、be primed with an ad hesion primerprior to painting.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J163-AWP 3948-b Page 3 of 5 3.3.2 Plastic Preparation.The surface to be painted shall be cleaned by an acceptablepr ocess, e.g. power wash, to remove mold releasing agents,fingerprints, oils, dirt and moistur
13、e.3.6.3 Primer application (see also 5.2)Dry film thickness: 25 - 35 micrometre;Flash off time: 3 minutes;Baking: 15 minutes at 8 0 C, for Polyamide also 10 minutes at120 C (Object temperature).3.6.4 Top coat applicationApplication of currently used two pack top coat systems, filmth ickness and baki
14、ng as specified in the relevant materialspecification.3.6.5 Use as a Repair Primer (only if used in the plant)The primed part shall b e sanded through to bare substrate inthe centre in an area of 30 mm diameter with 400 sandingpaper an cleaning petrol and than wiped with a clean cloth.Priming and pa
15、inting according to 3.6.3 and 3.6.4.3.6.6 AgeingTest panels prepared under this specification shall be agedfor at least 72 h at 23 +/- 2 C or 16 h at 45 +/- 1 C beforetesting for resistance properties.3.7 APPEARANCE (Primer only)3.7.1 Colour Light grey(FLTM BI 109-01)3.7.1 Gloss, min 40 %(FLTM BI 11
16、0-01, 60 deg)3.8 WATER IMMERSION TEST 240 h(FLTM BI 104-01)The test shall be performed on panels prepared without topcoat.No blistering, softening or loss of adhesion accepted.3.9 RESISTANCE PROPERTIESTest Panels and plastic parts painted according to para 3.6 of thisspecification shall meet all req
17、uirements of performancespecification WSK-M2P143-A.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J163-AWP 3948-b Page 4 of 5 3.10 SANDINGAfter curing, the primer can be sanded manually at room temperaturein case of spot repair.3.11 COMPATIBILITYIf the material is used as repair primer for primed buy parts
18、, theresult ant paint film shall meet all requirements of performancespecification WSK-M2P143-A.3.12 QUALITYThe primer must be adaptable for application in accordance with theappropriate Ford Motor Company Process Specification.The primer must be compatible with all related materials.3.13 SUPPLIERS
19、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 approved
20、 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 Engineer
21、ingactivity. Test data, t est samples and a new code identification areto be submitted with the request.Substance restrictions imposed by law, regulations or Ford apply tothe materials addressed by this document. The restrictions aredefined in Engineering Material Specification WS S-M99P9999-A1, unl
22、essa 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 approval ofthe ir materials shall first o
23、btain 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, notnominal values), the material designation an
24、d code number, and testspecimen s for Ford evaluation. Upon approval, the material will be addedto the Engineering Material Approved Source List. ENGINEERING MATERIAL SPECIFICATIONWSK-M6J163-AWP 3948-b Page 5 of 5 5. GENERAL INFORMATIONThe information given below is provided for assistance and clari
25、ficationand does not represent requirement(s) to this specification.5.1 DENSITY OF THE DRY FILM see Initial Sample(FLTM BI 154-02) +/- 0,02 kg/L5.2 FILM THICKNESSThe necessary film thickness in production is depending on thesurface of the part and may be increased to maximum 80 micrometre.Flash off time as well as baking conditions must be adapted to ahigher film build under the relevant process conditions.
