1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Release No. Release/Revision1991-09-02 EP00E01089488000 Released KWWP 3948-a Page 1 of 7 PRIMER SURFACER, COLOURED, PU-MODIFIED WSK-M6J160-A1POLYESTER, MEDIUM SOLID, 165 C BAKINGTEMPERATURE1. SCOPEThe material defined by this
2、specification is a solvent borne, modifiedpolyester, baking primer surfacer for exterior automotive applications.2. APPLICATIONThis s pecifications was released originally for material used as a primersurfacer over baked EC surfaces on vehicle bodies and small parts toprovide good stone chip resista
3、 nce and enamel appearance. The primer willbe painted with either solvent borne topcoats or waterbo rne basecoats. Thematerial is suitable for electrostatic spray application.3. REQUIREMENTS3.1 STATISTICAL PROCESSSupplie rs must conform to the requirements of Ford Quality SystemStanda rd Q-101. A mu
4、tually 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/OR THERMAL ANALYSISFord Motor Comp
5、any, 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 material lab oratory. All samples shal
6、l 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 conditioned ina control led atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior
7、 to testing and tested under thesame conditions unless otherwise specified.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J160-A1WP 3948-b Page 2 of 7 3.4 COMPOSITION3.4.1 ResinPol yurethane modified polyester resins and suitable crosslinking components.3.4.2 PigmentsPigment s and fillers to obtain the des
8、ired colour andresistance properties.3.4.3 Solvent Emissions See Initial Sample(ASTM D 3960) +/- 1 %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
9、 at Spray Viscosity(FLTM BI 102-01; FLTM BI 111-01, FC# 3 at 25 C)Spray viscosity 67 +/- 2 sColour groupGrey 64 - 66 %dark colours (e.g. mid red, dark blue) 63 - 65 %Black (e.g. anthrazit) 57 - 59 %light colours (e.g. light red) 63 - 65 %3.5.2 Density See Initial(ASTM D 1475) Sample +/- 0.05g/mL3.5.
10、3 Viscosity as supplied See Initial(FLTM BI 111-01) Sample +/- 5 s3.5.4 Spray Viscosity As specified by(FLTM BI 111-01) the supplierThe material shall be r educed with Xylene (WSK-M14J239-A) orany equivalent thinner.3.5.5 Storage Stability 90 daysDuring a storage between 5 and 32 C temperature mater
11、ial assuppli ed shall not settle up or cake insoluble. After thestorage the material must pass all specificationrequirements.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J160-A1WP 3948-b Page 3 of 7 3.6 PREPARATION OF TEST PANELS(FLTM BI 103-02, Method B,b)3.6.1 Substrates- Standard Steel Panels per para
12、 5.3For Initial Approval only- Precoated Steel Panels as used in the plant.All steel substrates sh all be zinc phosphated and conform tothe requirements of WSK-M3P1-C.3.6.2 Cathodic ElectrocoatFord Engineering approved current production electrocoatpr imer, application and film thickness as specifie
13、d in therelevant material specification.3.6.3 PrimerDry film thickness 25 - 35 micrometreFlash off time 3 minutesBaking (metal temperature) 5 minu tes at 165C and 5 minutesat 190 C3.6.4 Top CoatAppli cation of current approved colour-adapted two coatmetallic as well as solid colou r top coat; film t
14、hickness andbaking as specified in the relevant paint materialspecification.3.6.5 AgeingTes t 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 APPEARANCEColour, gloss and surface finish shall match
15、 master Trim Sample and/orMaster Appearance Sample as approved by Design.3.7.1 Colour (Primer only) Visual conformation with the Initial(FLTM BI 109-01) Sample within acceptable tolerance3.7.2 Gloss (Primer only) 75 - 90 %(FLTM BI 110-01, 60 deg)ENGINEERING MATERIAL SPECIFICATIONWSK-M6J160-A1WP 3948
16、-b Page 4 of 7 3.8 PAINT FILM PROPERTIES3.8.1 LevelingThe sur face of the primer shall be smooth without anystructure and not more than a minimum of orange peel whenapplied in a dry film thickness of 35 micrometre.3.8.2 HoldoutNo evi dence of dulling, no craters or pinholes and no changein i mage cl
17、arity when enamel colour coat is applied overunsanded primer.Sanding scratches shall only be hardly visible.3.8.3 SandingAfter bak ing the primer can be water sanded (P400) or drysanded (P800) by hand without clogging the paper.3.9 RESISTANCE PROPERTIES3.9.1 Adhesion Grade 0(FLTM BI 106-01, Method B
18、)3.9.2 Stone Chip Resistance, max Rating 2(FLTM BI 157-04)In c ase critical top coat colours do not achieve rating 2,rating 3 shall be accepted.3.9.3 Salt Spray Resistance, min 240 h(FLTM BI 103-01)No blistering and no rust on the panel surface and no morethan 3 m m rust creepage and loss of adhesio
19、n from a scratchscribed to the bare metal.3.9.4 Water Immersion Test, min 480 h(FLTM BI 104-01)No blistering, loss of gloss or loss of adhesion accepted.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J160-A1WP 3948-b Page 5 of 7 3.10 FLORIDA WEATHERING 12 months(FLTM BI 160-01)Test panels or specimens pain
20、ted according to para 3.6 of thisspecific ation shall be exposed in the area of Miami, Florida, 5 degfacing south for 12 months exposure time.Examination. Bli stering, peeling, cracking, crazing, chalking, yellowing, lossof gloss or any other deterioration. Test specimen shall be equal to or better
21、than the Master Sampleapproved by Materials Laboratory of Product Engineering.3.10.1 Water Immersion Test, 24 h No blistering(FLTM BI 104-01)3.11 PEELING RESISTANCECurrent production Clearcoat 12 monthsProduction Clearcoat without UV-Stabilizer. 3 monthsPrimed p anels according to 3.6.3 are painted
22、with Ford Engineeringapprov ed current production clearcoat as well as with productionclearcoat without UV - stabilizer.Dry film thickness 30 - 35 micrometre.The test panels shall be expose d in the area of Miami, Florida, 5 degfacing south for the required exposure time.Afte r the exposure the surf
23、ace shall show neither blistering norpeeling nor any other defect caused by the primer.3.11.1 Water Immersion Test, 24 h No blistering(FLTM BI 104-01)3.12 ADDITIONAL REQUIREMENTSTest panels and painted parts prepared according to this specificationshall meet all requirements of performance specifica
24、tion WSK-M2P136-A.3.13 COMPATIBILITYTh e primers must be compatible with all related materials e.g.,sealers, adhesives, primers and paint materials.The pr imer must be adaptable for application in accordance with FordMotor Company Process Specification U-C800.All prime rs shall be compatible for wet
25、 on wet application withprimers of other colour from the same supplier.All primers from the same supplier shall be miscible.ENGINEERING MATERIAL SPECIFICATIONWSK-M6J160-A1WP 3948-b Page 6 of 7 3.14 SUPPLIERS RESPONSIBILITYAll materials supplied to this specification must be equ ivalent in allchar ac
26、teristics to the material upon which approval was originallygranted.Pri or to making any changes in the properties, composition,const ruction, color, processing or labelling of the materialorigi nally approved under this specification, whether or not suchchanges affect the materials ability to meet
27、the specificationrequirements, the Supplier shall notify Purchasing, Toxi cology and theaff ected Materials Engineering activity of the proposed changes andobta in the written approval of the Materials Engineering activity.Test data , test samples and a new code identification are to besubmitted wit
28、h the request.Substance restrictions imposed by law, regulations or Ford apply toth e materials addressed by this document. The restrictions aredefined in Engineering Material Specification WSS-M99P9999-A1, unlessa differ ent suffix (e.g., A2 or A3) is specified on the engineeringdocument for the ap
29、plication.4. APPROVAL OF MATERIALSMaterials defined by this specification must have prior approval by theresponsible Materials Engineeri ng activity. Suppliers desiring approval oftheir mat erials shall first obtain an expression of interest from theaffecte d Purchasing, Design and Materials Enginee
30、ring activity. Uponrequest, the Supplier shall submit to the affected Materials Engineeringact ivity a completed copy of their laboratory test reports, signed by aqualified and authorized repres entative of the test facility, demonstratingfu ll compliance with all the requirements of this specificat
31、ion (testresults, not nominal values), t he material designation and code number, andtest spec imens for Ford evaluation. Fords engineering approval of amateria l will be based on its performance to this specification and on anassess ment of suitability for intended processes and/or applications. Up
32、onapproval, the material will be added to the Engineering Material ApprovedSource List.5. GENERAL INFORMATIONThe information given below is provided for assistance a nd clarification anddoes not represent requirement(s) to this specification.5.1 DENSITY OF THE DRY FILM See Initial Sample(FLTM BI 154
33、-02) +/- 0.02 kg/L5.2 DRY HIDING POWER, max. 30 micrometre(FLTM BI 158-01)ENGINEERING MATERIAL SPECIFICATIONWSK-M6J160-A1WP 3948-b Page 7 of 7 5.3 STANDARD STEEL PANELSZi nc phosphated test panels prepared in accordance with FordManufacturing Standard U-MA18004/U-MA18005.No n-phosphated test panels prepared in accordance with FordManufacturing Standard U-MA18006.5.4 MATERIAL REFERENCEAll relat ed materials used for approval of primer according to thisspe cification, e.g. electrocoat primer and paint materials shall benoted in the Initial Sample Report of the primer.
