1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Release No. Revisions Rev 01 2012 05 04 N Status No usage or replacement N. Benipal, NA 1991 08 15 NB00I10031967002 Released 3948-a Page 1 of 7 ENAMEL, ACRYLIC BAKING, POLISH RESISTANT, ESB-M32J126-A HIGH SOLIDS, EXTERIOR LO
2、W AND MEDIUM GLOSS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a polish resistant, thermosetting acrylic or polyester baking enamel suitable for exterior exposure on large, highly visible sheet metal surfaces. 2. APPLICATION This specification was released or
3、iginally for enamels used on exterior parts where a low or medium gloss is required. It shall be satisfactory for use over and/or under specified primers, enamel sealers or enamel topcoats. 3. REQUIREMENTS 3.1 COMPOSITION 3.1.1 Vehicle The fixed vehicles shall be melamine modified acrylic/polyester
4、polymer resins. Minute amounts of plasticizers are permitted. 3.1.2 Pigment The pigments shall be balanced and blended so that the finished enamels match the Ford Motor Company master panel in color and luster and meets the requirements of these specifications for durability and polish resistance. 3
5、.1.3 Specific Composition When it is necessary to obtain specific data regarding enamel formulations, it is understood that suppliers will furnish such data on request. 3.1.4 Toxicity The enamels shall contain no benzene, chlorinated or other toxic compounds or have an obnoxious or objectionable odo
6、r. ENGINEERING MATERIAL SPECIFICATION ESB-M32J126-A Page 2 of 7 3.2 PHYSICAL PROPERTIES 3.2.1 Viscosity 30 - 35 s (FLTM BI 111-01) 3.2.2 Non-Volatile Solids (FLTM BI 102-01) At Spray Viscosity VOC % Volume Solids All colors, solid or metallic 3.80 max 4.5 min 3.2.3 Hiding Power, Wet (FLTM BI 101-01)
7、 Colors containing organic pigments, max 16 Metallic colors Refer 3.2.4 All other colors, max 12 Test Conditions . Viscosity 20 s #4 Ford Cup 0.05 mm for black . Wedge Constant 0.18 mm for all other colors 3.2.4 Hiding, Dry Checkerboard (FLTM BI 103-01) For metallic enamels only complete visual hidi
8、ng over black and gray checkerboard at 30 micrometre dry film thickness. 3.2.5 Stability The material shall not jell or liver on standing. Test Method: Place a sealed 0.5 L can in an oven for 16 h at 60 +/- 1 C. A change in viscosity of 10 s or hard packed settling shall indicate instability. 3.2.6
9、Settling The material shall not exhibit hard settling that cannot be readily dispersed after a three month shelf storage period. 3.3 PREPARATION OF TEST PANELS (FLTM BI 103-02, Method “B“) The following requirements are specific for ESB-M32J126-A enamels in addition to those shown in the test method
10、. ENGINEERING MATERIAL SPECIFICATION ESB-M32J126-A Page 3 of 7 3.3.1 Primer Apply current production spray primer reduced to spray viscosity with appropriate thinner to a dry film thickness of 35 - 43 micrometre. Bake 15 minutes at 149 +/- 2 C metal temperature. 3.3.2 Enamel 3.3.2.1 Over Wet Primer
11、Apply ESB-M32J126-A (reduced with appropriate solvent to spray viscosity of 28 +/- 2 s #4 Ford Cup) to a dry film thickness of 35 - 43 micrometre). Apply wet-on-wet over current production spray primer and bake 15 min at 149 +/- 2 C metal temperature. 3.3.2.2 Over Baked Primer Apply ESB-M32J126-A qu
12、ality enamel (reduced to 28 s #4 Ford Cup at 27 C with methyl amyl ketone; record percent of solvent required) to a dry film thickness of 33 - 46 micrometre, enamel only. Bake per para 3.3.5. 3.3.3 Both solid colors and metallic colors require two medium wet coats with 5 - 10 s flash between coats f
13、or optimum gloss. 3.3.4 Age panels before testing as shown in the respective tests. 3.3.5 Baking Cycles The following baking schedules are required for quality enamel tests: Standard Bake: 17 minutes at 129 +/- 2 C The above bake applies to the following tests: Para 3.4.1 Color Para 3.4.2 Gloss Para
14、 3.4.3 Heat sensitivity Para 3.5.2 Hardness Para 3.5.3 Adhesion Para 3.5.6 Polish resistance Para 3.6 Resistance properties Rebake: Standard bake plus 20 minutes at 138 C Para 3.4.1 Color Para 3.4.2 Gloss Para 3.4.3 Heat sensitivity Para 3.7.3 Intercoat adhesion 3.4 APPEARANCE 3.4.1 Color (FLTM BI 1
15、09-01) ENGINEERING MATERIAL SPECIFICATION ESB-M32J126-A Page 4 of 7 Color shall match the Ford Motor Company master panel after all of the baking cycles described in para 3.3.5. 3.4.2 Gloss (FLTM BI 110-01) The gloss (20 deg glossmeter) shall be specified by means of a letter suffix to the color num
16、ber assigned by Styling as follows: B 80 +/- 4 F 35 +/- 3 C 70 +/- 4 G 20 +/- 3 D 62 +/- 3 H 10 +/- 3 E 50 +/- 3 J 6 max 3.4.3 Heat Sensitivity A commercial color match shall be obtained with no significant change in gloss as defined in para 3.4.2, or more than 4 units change in Tukon hardness, when
17、 the enamel is baked at the following schedules: . 17 min at 129 C . Standard bake plus 20 minutes at 138 C 3.4.4 General The enamels shall bake out to a presentable, serviceable film showing no craters, pinholes, seediness, abnormal roughness or excessive metallic mottling. 3.5 FILM PROPERTIES 3.5.
18、1 Film Thickness 33 - 46 micrometre 3.5.2 Hardness (FLTM BI 112-02) Knoop, min 8 Film Thickness Standard per para 3.5.1: No correction required. Bake Standard (para 3.3.5) ENGINEERING MATERIAL SPECIFICATION ESB-M32J126-A Page 5 of 7 3.5.3 Adhesion (FLTM BI 106-01) No flaking or chipping over unsande
19、d primer or enamel. 3.5.4 Intercoat Adhesion (FLTM BI 106-02) Shall be satisfactory 3.5.5 Chip Resistance (FLTM BI 107-01) 3.5.6 Polish Resistance (FLTM BI 10-02, 60 deg Glossmeter) The painted panel shall exhibit no greater change in gloss than 10 units. 3.6 RESISTANCE PROPERTIES 3.6.1 Salt Spray R
20、esistance, min 240 h (FLTM BI 103-01) There shall be no blistering and no more than 3 mm rust creepage or loss of adhesion from a line scribed through to bare steel. 3.6.2 Condensing Humidity, min 240 h (FLTM BI 104-02, Method “A“) There shall be no blistering, peeling, or loss in holdout. 3.6.3 Wat
21、er and Soap Spotting (FLTM BI 113-01) 3.6.3.1 Water Spot Discoloration None permitted 3.6.3.2 Soap Spot Discoloration None permitted 3.6.4 Acid Spotting (FLTM BI 113-02) 3.6.4.1 Acid Spot Discoloration No discoloration after 10 minutes. Discoloration after 20 and 30 minutes shall be no greater than
22、the standard on file. ENGINEERING MATERIAL SPECIFICATION ESB-M32J126-A Page 6 of 7 3.6.5 Weathering Resistance The finished test specimen shall show a minimum degree of fading, chalking, dulling or color change. No greater change of gloss is permitted than equivalent approved production colors. No i
23、ncrease of brittleness or loss of adhesion is permitted and specimens shall be completely free from evidence of cracking, checking, blistering, peeling, or rusting after exposure as follows: Florida exposure (Miami Area), min 18 months at 5 deg facing south. Accelerated Weathering* (FLTM BO 101-01)
24、750 h in Atlas XW Weatherometer. *In the event of differences between accelerated weathering and Florida exposure, the Florida exposure shall govern. 3.7 SUPPLIERS RESPONSIBILITY All materials supplied to this specification must be equivalent in all characteristics to the material upon which approva
25、l was originally granted. Prior to making any change in the properties, composition, construction, 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
26、 shall notify Purchasing, Toxicology and the affected Materials Engineering activity of the proposed 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 impos
27、ed by law, regulations or Ford, apply to the materials addressed by this document. The restrictions are defined in Engineering Material Specification WSS-M99P9999-A1, unless a different suffix (e.g., A2 or A3) is specified on the engineering document for the application. ENGINEERING MATERIAL SPECIFI
28、CATION ESB-M32J126-A Page 7 of 7 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 from the affected Purchasing, Desi
29、gn 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 compliance with all the requir
30、ements of this specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. In addition to meeting the requirements of this specification, the materials will be assessed for suitability for intended applications as part of the approval process. Upon approval, the material will be added to the Engineering Material Approved Source List.
