FORD WSS-M4G318-A-2018 COATING POLYVINYL CHLORIDE (PVC) SPRAYABLE PRIMER OVEN CURING CHIP RESISTANT IMPROVED PAINTABILITY TO BE USED WITH FORD WSS-M99P1111-A .pdf
《FORD WSS-M4G318-A-2018 COATING POLYVINYL CHLORIDE (PVC) SPRAYABLE PRIMER OVEN CURING CHIP RESISTANT IMPROVED PAINTABILITY TO BE USED WITH FORD WSS-M99P1111-A .pdf》由会员分享,可在线阅读,更多相关《FORD WSS-M4G318-A-2018 COATING POLYVINYL CHLORIDE (PVC) SPRAYABLE PRIMER OVEN CURING CHIP RESISTANT IMPROVED PAINTABILITY TO BE USED WITH FORD WSS-M99P1111-A .pdf(7页珍藏版)》请在麦多课文档分享上搜索。
1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 3 2018 02 26 Revised See Summary of Revisions M. Jones, NA 2013 05 17 Revised See Summary of Revisions W. Janitschke, EU 2009 12 10 Activated W. Janitschke / T. Honey, EU Controlled document at www.MATS Copyright 2018, Ford Global Techno
2、logies, LLC Page 1 of 7 COATING, POLYVINYL CHLORIDE (PVC), SPRAYABLE, PRIMER OVEN WSS-M4G318-A CURING, CHIP RESISTANT, IMPROVED PAINTABILITY 1. SCOPE The material defined by this specification is a solvent release, heat curing, stone peck resistant PVC coating for exterior body areas. 2. APPLICATION
3、 This specification was released originally for material used as a stone peck protective coating over baked electrocoat on the lower body side of passenger cars & trucks and cures during the body spray primer bake cycle. The material is compatible in paint process and can be applied by airless spray
4、 in a wet film thickness of 200 - 500 micrometer with or without pre-gelling prior to spray primer application. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS Material suppliers and part producers must conform to the Companys Standard Requirements Materials (WSS-M99P1111-A). Part producers using this mat
5、erial 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. 3.2 TEST PANEL PREPARATION 3.2.1 Use 300 x 100 x 0.8 - 0.9 mm E-coated test panels according to FLTM BI 120-01. The sealer must
6、 be applied on the cured E-coated test panel within 30 minutes after oven curing. 3.2.2 Use paint-materials and curing conditions according to FLTM BV 150-05 (for each individual region) 3.3 RHEOLOGY Suppliers must submit flow characterization data to Ford Motor Company for flow modeling and process
7、 window determination. For a specified temperature range, the requested properties include, but are not limited to, viscosity, yield stress, apparent activation energy for viscosity and apparent activation energy for yield stress. This data constitutes the reference standard and shall be kept on fil
8、e at the designated material laboratory. 3.4 SOLIDS 92% min (FLTM BV 150-10) 3.5 ASH 28% max (FLTM BV 150-10) ENGINEERING MATERIAL SPECIFICATION WSS-M4G318-A Copyright 2018, Ford Global Technologies, LLC Page 2 of 7 3.6 DENSITY at 23 C 1.50 kg/L max (ASTM D 1475) 3.7 VISCOSITY at 23 C (Rotational Rh
9、eometer i.e. Bohlin or equivalent) Tempering Time: 300 s Pause Interval: 180 s at 131 1/s Downward Measure: 131 1/s - 20 1/s in 120 s (30 Measure Points) Viscosity (Pas) Yield Point (Pa) 3.7.1 As received 1.00 - 1.30 140 - 150 3.7.2 After Aging 1.35 - 1.45 100 - 140 (336 h at 30 +/- 2 C) Alternative
10、 Method: (SAE J 1524, VIS-2, 1.32 mm orifice, 280 kPa) Final approval of a specific material viscosity for production shipments shall be made by the affected manufacturing activity. In all cases, the viscosity shall be within process limits as identified on the material control plan. The viscosity t
11、olerance for any one supplier shall be +/- 10 %, based on the recorded viscosity of the original approved production sample. 3.7.3 As Received +/- 10% (Conditioning Method A) 3.7.4 Aged 80 s max (Material aged in closed container for 72 h at 40 +/- 1 C, conditioning Method A) 3.7.5 90 Day Storage St
12、ability at 23 +/-2 C and 32 +/- 2 C The supplier shall provide a viscosity profile versus time from initial through 90 days storage at 23 +/- 2 C and 32 +/-2 C. Measurements shall be taken at weekly intervals. Curves shall be made available to Materials Engineering prior to addition on the Approved
13、Source List. Note: Report the test method used. 3.8 SURFACE CONDITION AFTER AGING (120 h at 80 +/- 2 C) After curing the material shall be dry to the 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. Afte
14、r bending 90 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 adhesion between the various layers. ENGINEERING MATERIAL SPECIFICATION WSS-M4G318-A Copyright 2018, Ford Global Technologies, LLC Page 3 of 7 Panel-Preparation: - Test
15、panels (para 3.2.1) shall be coated with the material in such a manner, that after curing a dry coating thickness of 200 + 500 micrometer is obtained. - After 10 minutes at 23 +/- 2 C, coat specimens wet on wet with spray primer. Cure specimens separately with min. and max. curing cycle (see para 3.
16、2.2) - After 10 minutes at 23 +/- 2 C, spray separate specimens with light colored standard and metallic base/clearcoat. Cure specimens separately with min. and max. curing cycle (see para 3.2.2) Test-Method: - Condition for 2 h at 23 +/- 2 C and expose in mechanical convection oven maintained at 80
17、 +/- 2 C for 120 h. - Test and examine after 24 h at 23 +/- 2 C. 3.9 FLEXIBILITY AFTER AGING (only E-Coat/Sealer) No cracking, chipping (FLTM BV 153-02, Method C, except test panels or loss of adhesion per para 3.2.1, dry coating thickness 200 + 500 micrometer, mandrel diameter 100 mm) 3.10 ADHESION
18、 AFTER HEAT AGING (only E-Coat/Sealer) No cracking, chipping (FLTM BV 153-03, Method B, except test panels or loss of adhesion per para 3.2.1, dry coating thickness 200 + 500 micrometer, 14 d aging at 80 +/- 2 C, 2 h at 23 +/- 2 C, mandrel diameter 100 mm) 3.11 ADHESION (only E-Coat/Sealer) The mate
19、rial at all ranges of coating thickness shall not peel off in a coherent film. Test Method: - Coat test panels from para 3.2.1 so that after the: (a) min curing cycle, (b) max curing cycle (see para 3.2.2) a dry coating thickness of 500 micrometer, beginning at one edge of the test panel and taperin
20、g 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 panel and 20 mm apart and try to peel off coating starting at the edge with the lowest film thickness. 3.12 ABRASION RESISTANCE (ASTM D 968) There shall be no exposed meta
21、l area showing after No loss of adhesion on and around the (a) 200 micrometer - 150 L area of stone impact. (b) 300 micrometer - 250 L and (c) 500 micrometer - 370 L gravel impact ENGINEERING MATERIAL SPECIFICATION WSS-M4G318-A Copyright 2018, Ford Global Technologies, LLC Page 4 of 7 Panel Preparat
22、ion: - Test panels (para 3.2.1) shall be coated with the material in such a manner (airless), that after curing a dry coating thickness of (a) 200 - 250, (b) 300 - 350, (c) 450 - 500 micrometer is obtained. - After 10 minutes at 23 +/- 2 C, coat specimens wet on wet with spray primer. Cure specimens
23、 separately with min. and max. curing cycle (see para 3.2.2) - After 10 minutes at 23 +/- 2 C, spray separate specimens with light colored standard and metallic base/clearcoat. Cure specimens separately with min. and max. curing cycle (see para 3.2.2). Condition for 2 h at 23 +/- 2 C and expose in m
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