1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1993 06 01 EP00E10258817000 complete revise KW1985-04-12 B/001677 TP 3.4. added1984-08-28 SM/EQ 5486 TP ReleaseWP 3948-a Page 1 of 5 PAINT, TWO PACK, PLASTIC SUBSTRATES, HIGH FLEXIBLE, ESK-M16J3-AEX
2、TERIOR1. SCOPEThe mate rial defined by this specification is a high flexible exteriorpaint for plastic substrates. It must be cured with a suitable isocyanatehardener.2. APPLICATIONThis spe cification was released originally for material used as two packpaint for polycarbonate bumpers.3. REQUIREMENT
3、S3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStandar d Q-101. A mutually acceptable Control Panel as describedtherein is required for material/source approval. Appropriatestatist ical tools must be used to analyze process/product data sothat variation in
4、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 spectra and thermograms established for i nitial approval shallconst
5、 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 CONDITIONINGAll test values indicated herein are based on ma terial co
6、nditioned 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.ENGINEERING MATERIAL SPECIFICATIONESK-M16J3-AWP 3948-b Page 2 of 5 3.4 COMPOSITION3.4.1 Resin: Synthetic resins, c
7、ontaining hyroxyl groups.3.4.2 Pigments: Pigments to obtain the desiring colour andproperties.3.5 MATERIAL PROPERTIES3.5.1 Non-volatile see Initial Sample +/- 1 %;(FLTM BI 102-01)The non-volatile content varies depending on the colour:Black and dark colours: min. 45 %Other colours: min. 55 %White: m
8、in. 65 %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 Sample +/- 5 s (FLTM BI 111-01)3.5.4 Spray Viscosity as specified by the supplier (FLTM BI 111-
9、01, FC #4)The material can be red uced with Xylene (S-M14J245-A), Butylacetate (ESK-M14J228-A) or any other suitable thinner.3.5.5 Mixing ratio as specified by the supplier Th e material shall be cured with isocyanate hardeners ESK-M99J323-A1/-A2, SK-M99J9608-A or any other suita ble hardener.3.5.6
10、Dry Hiding Power, max. 40 um(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 cakeinso luble. After the storage the material must pass allspecification requirements.ENGINEERING MATERIAL SPECIFIC
11、ATIONESK-M16J3-AWP 3948-b Page 3 of 5 3.6 PREPARATION OF TEST PANELS3.6.1 SubstratePolycarbonate, Polyurethane, Polypropylene, etc. as specifiedon E ngineering Drawing. All tests shall be performed onpanels with a smooth, ungrained surface.3.6.2 Plastic PreparationThe surface to be painted shall be
12、cleaned by an acceptablepr ocess, e.g. power wash, to remove mold releasing agents,fingerprints, oils, dirt and moisture.Note: PP/EPDM plastics must either be primed with anadhesion primer or pret reated (flame process, etc.) prior topainting to provide sufficient paint adhesion.3.6.3 Primer Surface
13、r (if required)Application of a primer surfacer, film thickness and bakingas specified in the relevant material specification.3.6.4 Topcoat applicationDry film thickness: 40 - 45 micrometre;Flash off time: 5 minutes;Baking: 35 minutes at 80 C (minimum Object temperature) or25 minutes at 90 C (minimu
14、m Object temperature)3.6.5 AgeingTest panels prepared under this specification shall be agedfor at least 168 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 Sa
15、mple as approved by Design.3.7.1 Colour see MAS - Panel(FLTM BI 109-01)3.7.2 Gloss, min. 85 %(FLTM BI 110-01, 60 deg)ENGINEERING MATERIAL SPECIFICATIONESK-M16J3-AWP 3948-b Page 4 of 5 3.8 RESISTANCE PROPERTIESTest Panels and plastic parts painted according to para 3.6 of thisspecification shall meet
16、 all requirements of performancespecification WSK-M2P145-A.3.9 COLD IMPACT RESISTANCE (Initial Approval only)Falling dart test at -25 C (equipment available in Materials &Fastener Quality Engineering laboratory, Merkenich) or as specifiedon Engineering Drawing.The pai nted part shall show no breaks,
17、 cracks, chipping or otherfailur es. The topcoat shall not deteriorate the cold impactresistance of the unpainted part.3.10 QUALITYThe topcoat must be ada ptable for application in accordance with theappropriate Ford Motor Company Process Specification.The topcoat must be compatible with all related
18、 materials, e.g.primer, substrate, adhesives, etc.3.11 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, c
19、olor, 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 proposed
20、 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, apply tothe materials addressed by this document. The restrictions ared
21、efined in Engineering Material Specification WSS-M99P9999-A1.ENGINEERING MATERIAL SPECIFICATIONESK-M16J3-AWP 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 approvalof t
22、hei r 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 laboratory test reports, signed by aqualified and autho
23、rized 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, andtes t specimens for Ford evaluation. Fords engineering approval of amateri al will be based on it
24、s performance to this specification and on anassessment of suitability for intended processes and/or applications. Uponapprov al, the material will be added to the Engineering Material ApprovedSource List.5. GENERAL INFORMATIONThe information given below is provided for assistance and clarificationa
25、nd 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)5.2 MATERIAL REFERENCEAll related materials u sed for approval of topcoat according to thisspecification, e.g. primer, thinner, hardener and plastic substrateas we ll as the application parameter shall be noted in the InitialSample Report of the topcoat.
