1、 ENGINEERING MATERIAL SPECIFICATIONMaterial Name Specification NumberDate Action Changes1998 11 05 Revised Added B3; Completely revised W. Scholz1991 06 03 EP00E01089485000 Released W. Scholz Conc. J. SchultWP 3948-a Page 1 of 8SEALER, POLYVINYL CHLORIDE (PVC), PRIMER OVEN WSK-M4G297-BCURING, PAINTA
2、BLESEALER, POLYVINYL CHLORIDE (PVC), PRIMER OVEN WSK-M4G297-B3CURING, PAINTABLE1. SCOPEThe material defined by this specification is a solvent release, heatcuring, stone peck resistant PVC sealer for exterior body areas.2. APPLICATIONThis specification was released originally for material used as a
3、stonepeck protective coating for wheel house lip. The material is applied bya foam roller or airless spray on baked electrocoat in a wet filmthickness of approximately 160 - 320 micrometer wet on wet with sprayprimer.3. REQUIREMENTS3.1 QUALITY SYSTEM REQUIREMENTSMaterial suppliers and part producers
4、 must conform to QualitySystem Requirements, QS-9000. Material specification requirementsare to be used for initial qualification of materials. A ControlPlan for ongoing production verification is required. This planmust be reviewed and approved by the relevant Ford Materialsactivity and/or Ford Sup
5、plier Technical Assistance (STA) prior toproduction parts submission. Appropriate statistical tools mustbe used to analyze process/product data and assure consistentprocessing of the materials.Part producers using this material in their products, must useFord approved materials and must conform to a
6、 process control planwhich has been approved by STA and/or the relevant MaterialsActivity.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G297-BWSK-M4G297-B3WP 3948-b Page 2 of 83.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSISFord Motor Company, at its option, may conduct infrared and/orthermal analys
7、is of material/parts supplied to this specification.The IR spectra and thermograms established for initial approvalshall constitute the reference standard and shall be kept on fileat the designated material laboratory. All samples shall produceIR spectra and thermograms that correspond to the refere
8、ncestandard when tested under the same conditions.3.3 CONDITIONING AND TEST CONDITIONSAll test values indicated herein are based on material conditionedin a controlled atmosphere of 23 +/- 2 C and 50 +/- 5 % relativehumidity for not less than 24 h prior to testing and tested underthe same conditions
9、 unless otherwise specified.Unless otherwise specified, use EC-coated test panels according toFLTM BI 120-01, type C. The sealer must be applied on the curedEC-coated test panel within 30 minutes after oven curing.3.4 COLOR Gray or as onEngineeringDrawing3.5 SOLIDS, min 97.0 %(FLTM BV 150-10)3.6 ASH
10、, max 28.0 %(FLTM BV 150-10)3.7 DENSITY AT 23 C, max 1.34 kg/L(ASTM D 1475)3.8 VISCOSITY AT 23 C3.8.1 As ReceivedAt 2.5 rpm 37 Pa.s + 10 %At 5.0 rpm 26 Pa.s + 10 %At 10.0 rpm 17 Pa.s + 10 %3.8.2 After Aging, max(WSK-M4G297-B: 120 h at 35 +/- 2 C)(WSK-M4G297-B 3: 336 h at 40 +/- 2 C)At 2.5 rpm 50 Pa.
11、s + 20 %At 5.0 rpm 32 Pa.s + 20 %At 10.0 rpm 22 Pa.s + 20 %ENGINEERING MATERIAL SPECIFICATIONWSK-M4G297-BWSK-M4G297-B3WP 3948-b Page 3 of 8Test Method:. Brookfield viscometer type RVT/D, spindle No. 3. Stir material for 1 minute with spatula. Let the material rest for 30 minutes. Insert spindle into
12、 material and start measuring withundisturbed material at a frequency of 2.5 rpm;measure at 3 minutes. Continue measuring in the same way at frequencies of5.0 rpm and 10.0 rpm.3. 9 CURING CONDITIONSWSK-M4G297-B according to FLTM BV 150-05, Table 2 WSK-M4G297-B3(a) Two times 9 minutes at 140 +/- 2 C(
13、b) Two times 9 minutes at 170 +/- 2 C3.10 SURFACE CONDITION AFTER AGING(120 h at 35 +/- 2 C)The material shall be dry to touch after cooling to 23 +/- 2 C. Itshall be free from cracks or bubbles and shall show a uniformpaint film without staining or discoloration. After bending 90 degaround a mandre
14、l of 100 mm diameter within 2 s (see FLTM BV 153-04) there shall be no evidence of chipping or loss of adhesionbetween the various layers.Test Method:. Test panels 300 x 100 x 0.8 - 0.9 mm prepared according to FLTMBI 120-01, type C, shall be coated with the material (template30 mm wide) under test
15、so that after curing a dry coatingthickness of 150 - 300 micrometer is obtained. After 10 minutes at 23 +/- 2 C, coat specimens wet on wet withcurrent production spray primer, to a dry film thickness of 25 -35 micrometer. After 10 minu tes at 23 +/- 2 C, cure specimens separately(a) min curing cycle
16、, phase 1(b) max curing cycle, phase 1. After 10 minutes at 23 +/- 2 C, spray separate specimens withlight colored standard and metallic top coat enamel to a coatingthickness of 30 - 40 micrometer. After 10 minutes at 23 +/- 2 C, cure specimens separately(a) Min curing cycle, phase 2. Condition for
17、2 h at 23 +/- 2 C and expose in mechanicalconvection oven maintained at 80 +/- 2 C for 120 h. Test and e xamine after 24 h at 23 +/- 2 C.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G297-BWSK-M4G297-B3WP 3948-b Page 4 of 83.11 FLEXIBILITY AFTER AGING No cracking,(FLTM BV 153-02, Method C, except test pan
18、els chipping or300 x 100 x 0.8 - 0.9 mm, dry coating loss ofthickness 160 - 300 micrometer, curing cycle adhesionTable 2, 2 h at 23 +/0 2 C, mandrel diameter100 mm)3.12 COLD ADHESION AFTER HEAT AGING No cracking,(FLTM BV 153-03, Method B, except test panels chipping or300 x 100 x 0.8 - 0.9 mm, prepa
19、red according loss ofto FLTM BI 120-01, type C, dry coating adh esionthickness 160 - 300 micrometer, 14 d aging at80 +/- 2 C, 2 h at 23 +/- 2 C, mandrel diameter100 mm)3.13 ADHESIONThe material at all ranges of coating thickness shall not peel offin a coherent film.Test Method:. Coat 300 x 100 x 0.8
20、 - 0.9 mm test panels, prepared according toFLTM BI 120-01, type C, so that after the(a) min curing cycle(b) max curing cycleaccording to FLTM BV 150-01, Table 2, a dry coating thickness of0.5 mm beginning at one edge of the test panel and tapering tozero at the other is obtained. After 24 h at 23 +
21、/- 2 C, make two cuts through the coatingalong the 300 mm length of the panel and 20 mm apart and try topeel off coating starting at the edge with the lowest filmthickness.3.14 ABRASION RESISTANCE(ASTM D 968)There shall be no exposed metal area showing after (a) 100 L, (b)250 L, gravel impact (see G
22、eneral Information, para 5.2, forgravel type). No loss of adhesion on and around the area of stoneimpact.Test Method:. Test panels of 300 x 100 x 0.8 - 0.9 mm prepared according toFLTM BI 120-01, type C, shall be coated with the material undertest (template or foam roller) so that after curing a dry
23、coating thickness of (a) 160 - 200, (b) 300 - 350, micrometeris obtained.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G297-BWSK-M4G297-B3WP 3948-b Page 5 of 8. After 10 minutes at 23 +/- 2 C, cure test specimens separately,according to FLTM BV 150-05, Table 2:(a) min curing cycle(b) max curing cycle. Con
24、dition for 2 h at 23 +/- 2 C and expose in mechanicalconvection oven maintained at 70 +/- 2 C for 120 h. After conditioning for 24 h at 23 +/- 2 C, determine theabrasion resistance (ASTM D 968, except I.D. of tube, 25 mm, andat a gravel throughput rate of 30 - 40 L/h. For each specimen a5 L volume o
25、f fresh gravel shall be used. Check for abrasion resistance and loss of adhesion after(a) 100 L (dry coating thickness of 160 - 200 micrometer)(b) 250 L (dry coating thickness of 300 - 350 micrometer)gravel impact. Continue abrasion test until exposure of metalarea and again check for loss of adhesi
26、on.3.15 SALT SPRAY RESISTANCE(ASTM B 117)The material shall protect the test panel from corrosion for asalt spray exposure period of 500 h. It shall show no expansion,flaking or loss of abrasion resistance. No loss of adhesion on andaround the area of stone impact.Test Method:. Prepare test specimen
27、s in accordance with para 3.13. After conditioning for 24 h at 23 +/- 2 C, expose speci mens for500 h salt spray fog per ASTM B 117. After conditioning for 72 h at 23 +/- 2 C, determine abrasionresistance per para 3.13 and examine test panels for evidence ofcorrosion. Disregard the area 5 mm from th
28、e edges.3.16 FLOW RATE, max 2 mm(FLTM BV 153-01, Method A)Prepare test panels 300 x 100 x 0.8 - 0.9 mm, according to FLTM BI120-01, type C, wet film thickness 280 - 300 micrometer, template30 mm width, 270 mm length of sealer bead, cure 30 minutes at 120+/- 2 C.3.17 COMPATIBILITY WITH PRODUCTION PAI
29、NTSNo tackiness of material surface, no cracking or blistering. Thepaint shall cover the sealer satisfactorily without evidence ofdiscoloration or staining.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G297-BWSK-M4G297-B3WP 3948-b Page 6 of 83.17.1 Wettability and StainingTest Method:. Specimens prepared
30、per para 3.13, test material width30 - 35 mm. Proceed as outlined under FLTM BV 153-08, Method A,para 2 - 6, except use lightest and darkest solidcolor and metallic basecoat/ clearcoat. After 72 h at 23 + /- 2 C, mask 1/2 of the sealerribbon and expose for 240 h in the fluorescent sunlampcabinet (FL
31、TM BU 152-02).3.17.2 Determination of DiscolorationAfter Aging NoneTest Method:. Specimens prepared per para 3.16.1. After 24 h at 23 +/- 2 C store separate assemblies inthe darkness for 240 h at 40 +/- 2 C in a mechanicalconvection oven.3.17.3 Determination of Yellowing None(FLTM BV 153-12)Heat cur
32、e according to para 2, 175 +/- 2 C, 10 minutes,para 5, 130 +/- 2 C, 10 minutes, metal temperature. Thewarm-up time to reach this temperature shall not exceed10 minutes.3.17.4 Resistance to Weathering(SAE J1976)Test Method:. Specimens prepared per para 3.16.1. Expose test specimens in the Miami, Flor
33、ida area for 6months and 1 year at 5 deg to the south. Prior to examination clean specimens using soap(SM1B4) and water.3.18 TEMPERATURE CYCLING TEST No chipping, flaking, or loss ofadhesionTest Method:. S pecimens prepared per para 3.16.1.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G297-BWSK-M4G297-B3W
34、P 3948-b Page 7 of 8. After conditioning 72 h at 23 +/- 2 C, expose specimens threetimes to the following cycles:3 h at 80 +/- 2 C1 h at 23 +/- 2 C3 h at - 40 +/- 1 C1 h at 23 +/- 2 C16 h at 38 +/- 2 C and 98 +/- 2 % R.H. After 24 h at 23 +/- 2 C, bend 90 deg around a mandrel of 100 mmdiameter withi
35、n 2 s (FLTM BV 153-04).3.19 ABRASIVES Material shall contain noabrasive agentsTest Method: Dilute a 1 g sample of material under test with 3 gtoluene and mix thoroughly. Rub a portion of the diluted materialapproximately 10 times between two pieces of flat, clean plateglass. The appearance of scratc
36、hes on the glass plates shall beconsidered failure.3.20 SPRAYABILITYThe material shall be a smooth homogeneous mixture, free fromforeign material and suitable for use in airless spray equipment.It shall spray evenly and rapidly with no tip clogging orfluctuations in the spray pattern and with a min
37、spray back andfogging.3.21 QUALITYThe material shall be of uniform quality, free from foreignmaterial and properties detrimental to normal production use.3.22 STORAGE STABILITY, min WSK-M4G297-B: 3 months(From date of receipt at WSK-M4G297-B3: 3 monthsFord Motor Company)B: When stored in sealed unop
38、ened containers out of directsunlight at ambient temperatures between 5 C and 32 C.B3: When stored in sealed unopened containers out of directsunlight at ambient temperature of 40 C.3.23 SUPPL IERS RESPONSIBILITYAll materials supplied to this specification must be equivalent inall characteristics to
39、 the material upon which approval wasoriginally granted.ENGINEERING MATERIAL SPECIFICATIONWSK-M4G297-BWSK-M4G297-B3WP 3948-b Page 8 of 8Prior to making any change in the properties, composition,construction, color, processing or labeling of the materialoriginally approved under this specification, w
40、hether or not suchchanges affect the materials ability to meet the specificationrequirements, the Supplier shall notify Purchasing, Toxicology andthe affected Materials Engineering activity of the proposedchanges and obtain the written approval of the MaterialsEngineering activity. Test data, test s
41、amples and a new codeidentification are to be submitted with the request.Substance restrictions imposed by law, regulations or Ford, applyto the materials addressed by this document. The regulations aredefined in Engineering Materials Specification WSS-M99P9999-A1.4. APPROVAL OF MATERIALSMaterials d
42、efined by this specification must have prior approval by theresponsible Materials Engineering activity. Suppliers desiring approvalof their materials shall first obtain an expression of interest from theaffected Purchasing, Design and Materials Engineering activity. Uponrequest, the Supplier shall s
43、ubmit to the affected Materials Engineeringactivity a completed copy of their laboratory test reports, signed by aqualified and authorized representative of the test facility,demonstrating full compliance with all the requirements of thisspecification (test results, not nominal values), the material
44、designation and code number, and test specimens for Ford evaluation.Fords engineering approval of a material will be based on itsperformance to this specification and on an assessment of suitabilityfor intended processes and/or applications. Upon approval, the materialwill be added to the Engineerin
45、g Material Approved Source List.5. GENERAL INFORMATIONThe information given below is provided for clarification and assistancein meeting the requirements of this specification.5.1 FLASH POINT Above 100 C(ASTM D 93, Method A)Note: In case testing at higher temperatures is not feasiblebecause of gelling of test material, the supplier must certify inwriting that each separate volatile ingredient has a flash pointgreater than 100 C.5.2 GRAVEL: Type “GABRO“ grain size 5 - 8 mmSupply Source: Odenwalder HartsteinIndustrie GmbhErbacher Str. 62D - 6101 Rossdorf
