1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Changes 2009 10 14 A3/A4/A5 INACTIVATED A2- N-STATUSD Replaced by global strategy B. Witkowski, NA 1992 05 01 EP00E10176267000 Added A5 W. Scholz Conc. J. Schult 1990 12 03 EP00E01031542000 Released W. Scholz Conc. J.
2、 Schult WP 3948-a Page 1 of 7 SEALER, VINYL, HEAT CURING, SOLVENT RELEASE, WSK-M4G324-A1 ENGINE HOOD SEALER, VINYL, HEAT CURING, SOLVENT RELEASE, WSK-M4G324-A2 CLINCH FLANGE NOT TO BE USED FOR NEW DESIGN SEALER, VINYL, HEAT CURING, SOLVENT RELEASE, WSK-M4G324-A3 AIRLESS SPRAY, INTERIOR JOINTS INACTI
3、VE SEALER, VINYL, HEAT CURING, SOLVENT RELEASE, WSK-M4G324-A4 EXTERIOR JOINTS INACTIVE SEALER, VINYL, HEAT CURING, SOLVENT RELEASE, WSK-M4G324-A5 AIRLESS SPRAY, INTERIOR JOINTS INACTIVE 1. SCOPE The materials defined by these specifications are solvent release vinyl based heat curing sealers which m
4、ust be paintable in visible applications. 2. APPLICATION These materials were originally released for the sealing of interior and exterior joints. They are applied on cured EC-coated surfaces using airless spray or extrusion equipment. 3. REQUIREMENTS Unless otherwise specified use test panels EC-co
5、ated according to FLTM BI 120-01, Method C. The material must be applied on the EC-coated test panel within 30 minutes after oven curing. 3.1 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein
6、is required for material/source approval. Appropriate statistical tools must be used to analyze process/product data so that variation in the final product is continuously reduced. 3.2 INFRARED SPECTROPHOTOMETRY AND/OR THERMAL ANALYSIS Ford Motor Company, at its option, may conduct infrared and/or t
7、hermal analysis of material/parts supplied to this specification. The IR spectra and thermograms established for initial approval shall constitute the reference standard and shall be kept on file at the designated material laboratory. All samples shall produce IR spectra and thermograms that corresp
8、ond to the reference standard when tested under the same conditions. ENGINEERING MATERIAL SPECIFICATION WSK-M4G324-A1/A2/A3/A4/A5 WP 3948-b Page 2 of 7 3.3 CONDITIONING AND TEST CONDITIONS All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and
9、 50 +/- 5% relative humidity for not less than 24 h prior to testing and tested under the same conditions unless otherwise specified. 3.4 COLOR Beige, light grey or as specified on the Engineering drawing 3.5 VISCOSITY AT 23 +/- 2 C A1 to A4: FLTM BV 103-01, pressure 100 kPa, nozzle dia 2 mm, s A5:
10、PHYSICA RHEOLAB MC 10 or VISCOLAB LC 20 with cylinder measurement device, measuring system MS-Z3 DIN or disposable measuring system MS-ZE3 DIN Measuring Type: Flow and viscosity curve in rotational mode, D max = 131 s-1, according to Bingham, mPa.s/ Bingham Flow, Pa 3.5.1 As Received, range A1 A2 A3
11、 A4 A5 22-38 10-30 12-25 5-15 4500-5600/ 180-300 3.5.2 After Aging, max 45 45 40 35 5600-7000 (72 h at 35 +/- 2 C) 200-320 3.6 SOLIDS, min 96 % (FLTM BV 150-10) 3.7 ASH, max 45 % (FLTM BV 150-10) 3.8 WEIGHT PER VOLUME AT 23 C, max 1.48 kg/L (ASTM D 816) The weight tolerance for any one supplier shal
12、l be +/- 0.02 kg/L, based on the recorded weight of the originally approved sample. 3.9 HEAT RESISTANCE AFTER AGING No cracking, loss of adhesion, (FLTM BV 153-02, Method C, test chipping, blistering, charring panels 300 x 100 x 0.8 - 0.9 mm, or other deleterious effect heat cure according to FLTM B
13、V 150-05, Table 2) 3.10 COLD ADHESION AFTER HEAT AGING No cracking, no loss of (FLTM BV 153-04, Method B, test adhesion or chipping panels 300 x 100 x 0.8 - 0.9 mm, heat cure according to FLTM BV 150-05, Table 2, except in addition to the curing, 14 d heat aging at 85 +/- 2 C) ENGINEERING MATERIAL S
14、PECIFICATION WSK-M4G324-A1/A2/A3/A4/A5 WP 3948-b Page 3 of 7 3.11 CORROSION RESISTANCE No corrosion or loss of (ASTM B 117) adhesion Test Method: . Expose panels prepared in accordance with section 3.9 for 240 h in the salt spray cabinet. . Condition the test panels after exposure at 23 +/- 2 C for
15、24 h . Evaluate material adhesion in acordance with section 3.13. Observe for any evidence of corrosion originating directly under the material. 3.12 SAG RESISTANCE, max 3 mm (FLTM BV 153-01, Method A) 3.13 ADHESION In all areas of varying coating thickness the material shall not be peeled off in a
16、coherent film Test Method: . Coat 300 x 100 x 0.8 - 0.9 mm test panels, in such a manner that after the: a) maximum curing cycle b) minimum curing cycle According to FLTM BV 150-05, Table 2 (use separate specimens for each curing cycle) a dry coating thickness of 2 mm, beginning at one edge of the t
17、est 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 length of the test panel and 30 mm apart and try to peel off coating starting at the edge with the lowest film thickness. 3.14 WATER ABSORPTION, max 1.5 % (FLTM BV
18、153-07, except bake at 165 +/- 2 C) 3.15 COMPATIBILITY WITH PRODUCTION PAINTS 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-M4G324-A1/A2/A3/A4/A5 WP 39
19、48-b Page 4 of 7 3.15.1 Wetability and Staining Test Method: . Specimen preparation according to FLTM BV 153-08, Method A, para 1 to 3 and following 3 variants: a) except template 30 x 2 mm b) except template 30 x 2 mm and without spray primer application c) except material application in 30 mm widt
20、h and at one edge of specimen 2 mm thick tapering to zero at the other edge; no spray primer application. . Proceed as outlined under para 4 to 7 of FLTM BV 153-08, Method A. After 24 h at 23 +/- 2 C mask one half of the sealer beads types a) to c) and expose each assembly for 240 h. a) At 23 +/- 2
21、C, b) At 40 +/- 1 C, c) In the Fluorescent Sunlamp Cabinet (FLTM BU 152-02). Examine the exposed and unexposed portions of the sealer in steps of 24 hours. 3.15.2 Resistance to Weathering (SAE J1976) Test Method: . Expose test specimens in the Miami/Florida area for 6 months and 1 year at 5 deg faci
22、ng south. . Prior to examination clean specimens using soap (SM1B4) and water. 3.15.3 Determination of Yellowing None (FLTM BV 153-12) Heat cure at 175 +/- 2 C for 10 minutes, para 5, 130 +/- 2 C for 10 minutes metal temperature. The warmup time to reach this temperature shall not exceed 10 minutes.
23、 3.16 HARDNESS DUROMETER “A“ 40 - 80 (ISO 868, 3 s dwell) Test Method: . Apply a ribbon of test material in dimensions of 250 x 30 x 5 mm to a test panel of 300 x 100 x 0.8 - 0.9 mm. ENGINEERING MATERIAL SPECIFICATION WSK-M4G324-A1/A2/A3/A4/A5 WP 3948-b Page 5 of 7 . Condition for 10 minutes at 23 +
24、/- 2 C and expose in a mechanical convection oven at a temperature of 165 +/- 2 C for 30 minutes for Shore Hardness after conditioning at 23 +/- 2 C for 4 h. 3.17 SHEAR STRENGTH (FLTM BV 154-03, Method B) Prepare specimens according to section II; coating thickness x = 3 mm. Heat cure according to F
25、LTM BV 150-05, Table 2, min and max curing cycle; use separate specimens for each curing cycle. 3.17.1 At 23 +/- 2 C, min 500 KPa 3.17.2 At 90 +/- 2 C, min 200 KPa 3.17.3 At - 40 +/- 2 C, min 500 KPa 3.18 PEEL STRENGTH (FLTM BV 154-03, Method C) Prepare specimens according to section II; coating thi
26、ckness x = 3 mm. Heat cure according to FLTM BV 150-05, Table 2, min and max curing cycle; use separate specimens for each curing cycle. 3.18.1 At 23 +/- 2 C, min 5 N/mm 3.18.2 At 90 +/- 2 C, min 2 N/mm 3.18.3 At - 40 +/- 2 C, min 5 N/mm 3.19 BRIDGING (FLTM BV 153-05) The material shall bridge a gap
27、 of x = 4 mm for specifications A1, A2 & A4 and x = 2 mm for specification A3 & A5. The sag through length shall not exceed 5 mm. 3.20 ABRASIVES The material shall contain no abrasive agents. Test Method: Dilute a one gram sample of material with one gram of special white spirit (Boiling Range 60/14
28、0) and mix thoroughly. Rub a portion of the diluted material 5 times between two pieces of flat, clean plate glass. The appearance of scratches on the glass plate will be considered failure. 3.21 SPRAYABILITY The material shall be a smooth homogeneous mixture, free from foreign material and suitable
29、 for use in airless spray equipment. It shall spray evenly and rapidly with no tip clogging or fluctuations in the spray pattern and with a minimum spray-back and fogging. ENGINEERING MATERIAL SPECIFICATION WSK-M4G324-A1/A2/A3/A4/A5 WP 3948-b Page 6 of 7 3.22 QUALITY The material shall be of uniform
30、 quality, free from foreign material and properties detrimental to normal production use. 3.23 STORAGE STABILITY, min 3 months (From date of receipt at Ford Motor Company) When stored in sealed unopened containers out of direct sunlight at ambient temperatures between 5 and 32 C. 3.24 ADDITIONAL REQ
31、UIREMENTS Specific requirements for material and/or manufactured parts shall be specified on the Engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. 3.25 SU
32、PPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approval was originally granted. Prior to making any change in the properties, composition, construction, color, processing or labeling of the material originally
33、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 changes and obtain the written approval of the Material
34、s 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 restrictions are defined in Engineering Material Specification WSS-M9
35、9P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. ENGINEERING MATERIAL SPECIFICATION WSK-M4G324-A1/A2/A3/A4/A5 WP 3948-b Page 7 of 7 4. APPROVAL OF MATERIALS Materials defined by this specification must have prior approval by the resp
36、onsible Materials Engineering activity. Suppliers desiring approval of their materials shall first obtain an expression of interest from the affected Purchasing, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity a comple
37、ted copy of their laboratory test reports, signed by a qualified and authorized representative of the test facility, demonstrating full compliance with all the requirements of this specification (test results, not nominal values), the material designation and code number, and test specimens for Ford
38、 evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessment of suitability for intended processes and/or applications. Upon approval, the material will be added to the Engineering Material Approved Source List. 5. GENERAL INFORMAT
39、ION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 FLASH POINT Over 100 C (ASTM D 93, Method A) If 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 over 100 C.
