1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Release No. Released 2009 10 15 N-STATUS Replaced by global strategy B. Witkowski, NA 1994 12 19 Revised and Retyped, was 13 pages 1981 12 01 SM/EQ 8899 TP Released WP 3948-a Page 1 of 6 VINYL SEALER, HEAT CURING, AIRLESS SP
2、RAYABLE, SK-M4G9524-A SOLVENT RELEASE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a solvent release, airless sprayable vinyl based on heat curing sealer. 2. APPLICATION This material was originally released for the sealing of interior and exterior joints. It
3、is applied on EC-coated surfaces using airless spray equipment or tube gun. Prior to the release for a particular application and in addition to the requirements specified herein, full evaluation under actual production conditions must be ensured by affected Component Engineering activity. 3. REQUIR
4、EMENTS Note: Unless otherwise specified, use test panels EC-coated according to FLTM EU-BI 20-1, C. The material must be applied on the EC-coated test panel 30 minutes after oven curing. 3.1 COLOR Beige - light grey or as specified on Engineering drawing 3.2 FLASH POINT Over 100 C (ASTM D 93, Method
5、 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 over 100 C. 3.3 SOLIDS, min 96 % (FLTM EU-BV 50-10) 3.4 ASH, max 45 % (FLTM EU-BV 50-10) 3.5 DENSITY at
6、20 C, max 1.5 g/cm3 (ASTM D 1475) 3.6 VISCOSITY at 20 C (FLTM EU-BV 3-1, pressure 1.0 bar, nozzle dia 2 mm) ENGINEERING MATERIAL SPECIFICATION SK-M4G9524-A WP 3948-b Page 2 of 6 3.6.1 As Received 5 - 15 s 3.6.2 After Ageing, max 55 s (72 h at 35 +/- 2 C) Note: Final approval of a specific viscosity
7、of material for production shipments shall be made by affected Manufacturing Division. In all cases, however, the viscosity shall be within the limits specified above and shall meet all requirements of this specification (Control Sample Laboratory Report). 3.7 HEAT RESISTANCE AFTER AGEING (FLTM EU-B
8、V 53-2, Method C, test panels 300 x 100 x 0.8 - 0.9 mm, prepared according to clause 3, note. Heat curing according to FLTM EU-BV 50-5, Table 2, heat ageing at 80 +/- 2 C) No cracking, no loss of adhesion, no chipping or blistering. 3.8 COLD ADHESION AFTER HEAT AGEING (FLTM EU-BV 53-4, Method B, tes
9、t panels 300 x 100 x 0.8 - 0.9 mm, prepared according to clause 3, note. Heat curing according to FLTM EU-BV 50-5, Table 2, except in addition to the curing 14 d heat ageing at 80 +/- 2 C) No cracking, no loss of adhesion, no chipping or blistering. 3.9 CORROSION RESISTANCE No corrosion (FLTM EU-BV
10、53-11, Method B) 3.10 FLOW RATE, max 3 mm (FLTM EU-BV 53-1 A/B, Method A, except prepare test panels according to clause 3, note) ENGINEERING MATERIAL SPECIFICATION SK-M4G9524-A WP 3948-b Page 3 of 6 3.11 ADHESION In all areas of varying coating thickness, the material shall not be peeled off in a c
11、oherent film. Test Method: 1) Coat 300 x 100 x 0.8 - 0.9 mm test panels, prepared according to clause 3, note, in such a manner that after the a) minimum curing cycle b) max curing cycle according to FLTM EU-BV 50-5, Table 2 (use separate specimens for each curing cycle) a dry coating thickness of 2
12、.0 mm, beginning at one edge of the test panel and tapering to zero at the other, is obtained. 2) After 24 hours 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.
13、 3.12 WATER ABSORPTION, max 2 % (FLTM EU-BV 53-7) 3.13 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. 3.13.1 Wetability and Staining Test Method: 1) Speci
14、men preparation according to FLTM EU-BV 53-8, Method A, clause 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 width and at one edge of specimen 2 mm thick tapering to zero at th
15、e other edge; no spray primer application. ENGINEERING MATERIAL SPECIFICATION SK-M4G9524-A WP 3948-b Page 4 of 6 2) Proceed as outlined under clauses 4 to 7 of FLTM EU-BV 53-8, Method A. After 24 hours at room temperature, mask one half of the sealer beads types a) to c) and expose each assembly for
16、 240 hours (1) at room temperature, (2) at 40 +/- 2 C, (3) in the Fluorescent Sunlamp Cabinet (FLTM EU-BU 52-2). Examine the exposed and unexposed portions of the sealer in steps of 24 hours. 3.13.2 Resistance to Weathering Test Method: 1) Specimens preparation according to 3.13.1. a) - c). 2) Expos
17、e test specimens in the Miami, Florida area for 6 months and 1 year at 5 deg to the south. 3) Prior to examination, clean specimens using soap (S-M1B4) and water. 3.14 SHORE HARDNESS “A“ 40 - 80 Test Method: Apply enough material to a test panel of 300 x 100 x 0.8 - 0.9 mm, prepared according to cla
18、use 3, note, and scrape to a dimension of 30 x 5 mm thickness. Condition for 10 minutes at room temperature and expose in a mechanical convection oven at a temperature of 165 +/- 2 C for 30 minutes. Condition for four hours at room temperature and check the Shore Hardness according to ASTM D 2240. 3
19、.15 ABRASIVES The material shall contain no abrasive agents. Test Method: Dilute a one gram sample of material with one gram special white spirit (60/140) and mix thoroughly. Rub a portion of the diluted material 10 times between two pieces of flat, clean plate glass. The appearance of scratches on
20、the glass plate will be considered failure. 3.16 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 no tip clogging or fluctuations in the spray pattern and with a minimum
21、 spray back and fogging. ENGINEERING MATERIAL SPECIFICATION SK-M4G9524-A WP 3948-b Page 5 of 6 3.17 SHEAR STRENGTH (FLTM EU-BV 54-3, Method B; preparation of specimens in accordance with Section 2 coating thickness x = 3 mm. Heat curing cycle according to FLTM EU-BV 50-5, Table 2, min and max curing
22、 cycle; use separate specimens for each curing cycle) 3.17.1 At Room Temperature, min 50 N/cm2 3.17.2 At 90 +/- 2 C, min 20 N/cm2 3.17.3 At - 40 +/- 1 C, min 50 N/cm2 3.18 PEEL STRENGTH (FLTM EU-BV 54-3, Method C; preparation of specimens according to Section 2; coating thickness x = 3 mm. Heat curi
23、ng according to FLTM EU-BV 50-5, Table 2, min and max curing cycle; use separate specimens for each curing cycle) 3.18.1 At Room Temperature, min 50 N/cm 3.18.2 At 90 +/- 2 C, min 20 N/cm 3.18.3 At - 40 +/- 1 C, min 50 N/cm 3.19 BRIDGING (FLTM EU-BV 53-5, except prepare test panels according to FLTM
24、 EU-BI 20-1) The material shall bridge a gap of x = 4 mm. The sag through length shall not exceed 7 mm. 3.20 QUALITY The material shall be of uniform quality, free from foreign material and properties detrimental to normal production use. 3.21 STATISTICAL PROCESS Suppliers must conform to the requir
25、ements of Ford Quality System Standard Q-101. A mutually acceptable Control Plan as described therein is required for material/source approval. Appropriate statistical tool must be used to analyze process/product data so that variation in the final product is continuously reduced. ENGINEERING MATERI
26、AL SPECIFICATION SK-M4G9524-A WP 3948-b Page 6 of 6 3.22 SUPPLIERS 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
27、, color, 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 propo
28、sed changes 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 restrictio
29、ns are 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 inter
30、est from 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, demonstrati
31、ng 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 evaluation. Fords engineering approval of a material will be based on its performance to this specification and on an assessmen
32、t of suitability 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 STORAGE STABILITY (From date of receipt at Ford Motor Company) Minimum 6 months when stored between 5 C and 28 C.
