1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2014 10 20 N Status - B3 No replacement named L. Sinclair, NA 1998 11 05 Revised Added B3; Completely revised W. Scholz 1991 06 03 EP00E01089485000 Released W. Scholz Conc. J. Schult WP 3948-a Page 1 of 8 SEAL
2、ER, POLYVINYL CHLORIDE (PVC), PRIMER OVEN WSK-M4G297-B CURING, PAINTABLE SEALER, POLYVINYL CHLORIDE (PVC), PRIMER OVEN WSK-M4G297-B3 CURING, PAINTABLE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a solvent release, heat curing, stone peck resistant PVC sealer
3、for exterior body areas. 2. APPLICATION This specification was released originally for material used as a stone peck protective coating for wheel house lip. The material is applied by a foam roller or airless spray on baked electrocoat in a wet film thickness of approximately 160 - 320 micrometer we
4、t on wet with spray primer. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to Quality System Requirements, QS-9000. Material specification requirements are to be used for initial qualification of materials. A Control Plan for ongoing production ver
5、ification is required. This plan must be reviewed and approved by the relevant Ford Materials activity and/or Ford Supplier Technical Assistance (STA) prior to production parts submission. Appropriate statistical tools must be used to analyze process/product data and assure consistent processing of
6、the materials. Part producers using this material in their products, must use Ford approved materials and must conform to a process control plan which has been approved by STA and/or the relevant Materials Activity. ENGINEERING MATERIAL SPECIFICATION WSK-M4G297-B WSK-M4G297-B3 WP 3948-b Page 2 of 8
7、3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The IR spectra and thermograms established for initial approval shall constitute the reference standard and shall b
8、e kept on file at the designated material laboratory. All samples shall produce IR spectra and thermograms that correspond to the reference standard when tested under the same conditions. 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a con
9、trolled atmosphere of 23 +/- 2 C and 50 +/- 5 % relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. Unless otherwise specified, use EC-coated test panels according to FLTM BI 120-01, type C. The sealer must be applied on the cure
10、d EC-coated test panel within 30 minutes after oven curing. 3.4 COLOR Gray or as on Engineering Drawing 3.5 SOLIDS, min 97.0 % (FLTM BV 150-10) 3.6 ASH, 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 C 3.8.1 As Received At 2.5 rpm 37 Pa.s + 10 % At 5
11、.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-B3: 336 h at 40 +/- 2 C) At 2.5 rpm 50 Pa.s + 20 % At 5.0 rpm 32 Pa.s + 20 % At 10.0 rpm 22 Pa.s + 20 % ENGINEERING MATERIAL SPECIFICATION WSK-M4G297-B WSK-M4G297-B3 WP 3948-b Page
12、 3 of 8 Test 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 material and start measuring with undisturbed material at a frequency of 2.5 rpm; measure at 3 minutes. . Continue measurin
13、g in the same way at frequencies of 5.0 rpm and 10.0 rpm. 3.9 CURING CONDITIONS WSK-M4G297-B according to FLTM BV 150-05, Table 2 WSK-M4G297-B3 (a) Two times 9 minutes at 140 +/- 2 C (b) Two times 9 minutes at 170 +/- 2 C 3.10 SURFACE CONDITION AFTER AGING (120 h at 35 +/- 2 C) The material shall be
14、 dry to touch after cooling to 23 +/- 2 C. It shall be free from cracks or bubbles and shall show a uniform paint film without staining or discoloration. After bending 90 deg around a mandrel of 100 mm diameter within 2 s (see FLTM BV 153-04) there shall be no evidence of chipping or loss of adhesio
15、n between the various layers. Test Method: . Test panels 300 x 100 x 0.8 - 0.9 mm prepared according to FLTM BI 120-01, type C, shall be coated with the material (template 30 mm wide) under test so that after curing a dry coating thickness of 150 - 300 micrometer is obtained. . After 10 minutes at 2
16、3 +/- 2 C, coat specimens wet on wet with current production spray primer, to a dry film thickness of 25 - 35 micrometer. . After 10 minutes at 23 +/- 2 C, cure specimens separately (a) min curing cycle, phase 1 (b) max curing cycle, phase 1 . After 10 minutes at 23 +/- 2 C, spray separate specimens
17、 with light colored standard and metallic top coat enamel to a coating thickness of 30 - 40 micrometer. . After 10 minutes at 23 +/- 2 C, cure specimens separately (a) Min curing cycle, phase 2 . Condition for 2 h at 23 +/- 2 C and expose in mechanical convection oven maintained at 80 +/- 2 C for 12
18、0 h. . Test and examine after 24 h at 23 +/- 2 C. ENGINEERING MATERIAL SPECIFICATION WSK-M4G297-B WSK-M4G297-B3 WP 3948-b Page 4 of 8 3.11 FLEXIBILITY AFTER AGING No cracking, (FLTM BV 153-02, Method C, except test panels chipping or 300 x 100 x 0.8 - 0.9 mm, dry coating loss of thickness 160 - 300
19、micrometer, curing cycle adhesion Table 2, 2 h at 23 +/0 2 C, mandrel diameter 100 mm) 3.12 COLD ADHESION AFTER HEAT AGING No cracking, (FLTM BV 153-03, Method B, except test panels chipping or 300 x 100 x 0.8 - 0.9 mm, prepared according loss of to FLTM BI 120-01, type C, dry coating adhesion thick
20、ness 160 - 300 micrometer, 14 d aging at 80 +/- 2 C, 2 h at 23 +/- 2 C, mandrel diameter 100 mm) 3.13 ADHESION The material at all ranges of coating thickness shall not peel off in a coherent film. Test Method: . Coat 300 x 100 x 0.8 - 0.9 mm test panels, prepared according to FLTM BI 120-01, type C
21、, so that after the (a) min curing cycle (b) max curing cycle according to FLTM BV 150-01, Table 2, a dry coating thickness of 0.5 mm beginning at one edge of the test panel and tapering to zero at the other is obtained. . After 24 h at 23 +/- 2 C, make two cuts through the coating along the 300 mm
22、length of the panel and 20 mm apart and try to peel off coating starting at the edge with the lowest film thickness. 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 General Information, para 5.2, for gravel type). No l
23、oss of adhesion on and around the area of stone impact. Test Method: . Test panels of 300 x 100 x 0.8 - 0.9 mm prepared according to FLTM BI 120-01, type C, shall be coated with the material under test (template or foam roller) so that after curing a dry coating thickness of (a) 160 - 200, (b) 300 -
24、 350, micrometer is obtained. ENGINEERING MATERIAL SPECIFICATION WSK-M4G297-B WSK-M4G297-B3 WP 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 . Condition for 2 h at 23 +/- 2 C and ex
25、pose in mechanical convection oven maintained at 70 +/- 2 C for 120 h. . After conditioning for 24 h at 23 +/- 2 C, determine the abrasion resistance (ASTM D 968, except I.D. of tube, 25 mm, and at a gravel throughput rate of 30 - 40 L/h. For each specimen a 5 L volume of fresh gravel shall be used.
26、 . 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 metal area and again check for loss of adhesion. 3.15 SALT SPRAY RES
27、ISTANCE (ASTM B 117) The material shall protect the test panel from corrosion for a salt spray exposure period of 500 h. It shall show no expansion, flaking or loss of abrasion resistance. No loss of adhesion on and around the area of stone impact. Test Method: . Prepare test specimens in accordance
28、 with para 3.13. . After conditioning for 24 h at 23 +/- 2 C, expose specimens for 500 h salt spray fog per ASTM B 117. . After conditioning for 72 h at 23 +/- 2 C, determine abrasion resistance per para 3.13 and examine test panels for evidence of corrosion. Disregard the area 5 mm from the edges.
29、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 BI 120-01, type C, wet film thickness 280 - 300 micrometer, template 30 mm width, 270 mm length of sealer bead, cure 30 minutes at 120 +/- 2 C. 3.17 COMPATIBILITY WITH PRODUCTION PAINT
30、S No tackiness of material surface, no cracking or blistering. The paint shall cover the sealer satisfactorily without evidence of discoloration or staining. ENGINEERING MATERIAL SPECIFICATION WSK-M4G297-B WSK-M4G297-B3 WP 3948-b Page 6 of 8 3.17.1 Wettability and Staining Test Method: . Specimens p
31、repared per para 3.13, test material width 30 - 35 mm. . Proceed as outlined under FLTM BV 153-08, Method A, para 2 - 6, except use lightest and darkest solid color and metallic basecoat/clearcoat. . After 72 h at 23 +/- 2 C, mask 1/2 of the sealer ribbon and expose for 240 h in the fluorescent sunl
32、amp cabinet (FLTM BU 152-02). 3.17.2 Determination of Discoloration After Aging None Test Method: . Specimens prepared per para 3.16.1. . After 24 h at 23 +/- 2 C store separate assemblies in the darkness for 240 h at 40 +/- 2 C in a mechanical convection oven. 3.17.3 Determination of Yellowing None
33、 (FLTM BV 153-12) Heat cure according to para 2, 175 +/- 2 C, 10 minutes, para 5, 130 +/- 2 C, 10 minutes, metal temperature. The warm-up time to reach this temperature shall not exceed 10 minutes. 3.17.4 Resistance to Weathering (SAE J1976) Test Method: . Specimens prepared per para 3.16.1. . Expos
34、e test specimens in the Miami, Florida area for 6 months 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 of adhesion Test Method: . Specimens prepared per para 3.16.1. ENGINEERING MATER
35、IAL SPECIFICATION WSK-M4G297-B WSK-M4G297-B3 WP 3948-b Page 7 of 8 . After conditioning 72 h at 23 +/- 2 C, expose specimens three times to the following cycles: 3 h at 80 +/- 2 C 1 h at 23 +/- 2 C 3 h at - 40 +/- 1 C 1 h at 23 +/- 2 C 16 h at 38 +/- 2 C and 98 +/- 2 % R.H. . After 24 h at 23 +/- 2
36、C, bend 90 deg around a mandrel of 100 mm diameter within 2 s (FLTM BV 153-04). 3.19 ABRASIVES Material shall contain no abrasive agents Test Method: Dilute a 1 g sample of material under test with 3 g toluene and mix thoroughly. Rub a portion of the diluted material approximately 10 times between t
37、wo pieces of flat, clean plate glass. The appearance of scratches on the glass plates shall be considered failure. 3.20 SPRAYABILITY The material shall be a smooth homogeneous mixture, free from foreign material and suitable for use in airless spray equipment. It shall spray evenly and rapidly with
38、no tip clogging or fluctuations in the spray pattern and with a min spray back and fogging. 3.21 QUALITY The material shall be of uniform quality, free from foreign material and properties detrimental to normal production use. 3.22 STORAGE STABILITY, min WSK-M4G297-B: 3 months (From date of receipt
39、at WSK-M4G297-B3: 3 months Ford Motor Company) B: When stored in sealed unopened containers out of direct sunlight at ambient temperatures between 5 C and 32 C. B3: When stored in sealed unopened containers out of direct sunlight at ambient temperature of 40 C. 3.23 SUPPLIERS RESPONSIBILITY All mate
40、rials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. ENGINEERING MATERIAL SPECIFICATION WSK-M4G297-B WSK-M4G297-B3 WP 3948-b Page 8 of 8 Prior to making any change in the properties, composition, construction, colo
41、r, processing or labeling of the material originally approved under this specification, whether or not such changes affect the materials ability to meet the specification requirements, the Supplier shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed ch
42、anges and obtain the written approval of the Materials Engineering activity. Test data, test samples and a new code identification are to be submitted with the request. Substance restrictions imposed by law, regulations or Ford, apply to the materials addressed by this document. The regulations are
43、defined in Engineering Materials Specification WSS-M99P9999-A1. 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the responsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest fro
44、m the affected Purchasing, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity a completed copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full
45、 compliance with all the requirements of this specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessment of su
46、itability for intended processes and/or applications. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 FLA
47、SH POINT Above 100 C (ASTM D 93, Method A) Note: In case testing at higher temperatures is not feasible because of gelling of test material, the supplier must certify in writing that each separate volatile ingredient has a flash point greater than 100 C. 5.2 GRAVEL: Type “GABRO“ grain size 5 - 8 mm Supply Source: Odenwalder Hartstein Industrie Gmbh Erbacher Str. 62 D - 6101 Rossdorf
