1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Release No. Release/Revision Rev 01 2012 05 15 N Status No usage or replacement N. Benipal, NA 1989 05 17 CDS1-PR907166-1 Released WP 3948-a Page 1 of 5 PRIMER SURFACER, 2-COMPONENT, CHIP RESISTANT ESB-M6J156-A THERMOPLASTIC
2、 SUBSTRATES NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an exterior two-component urethane primer surfacer formulated to provide excellent chip resistance over thermoplastic substrates. 2. APPLICATION This specification was released originally as a primer sur
3、facer for thermoplastic front end components requiring excellent chip resistance. This primer was developed to be compatible for subsequent application with ESB-M99J344 chip resistant coating and/or ESB-M6J141 taupe primer surfacer. 3. REQUIREMENTS Qualification tests shall be made on the basis of c
4、omparison with approved production material and tested under identical conditions. In the event that both the sample under test and the control material fail any requirement, that test shall be repeated. 3.1 STATISTICAL PROCESS Suppliers must conform to the requirements of Ford Quality System Standa
5、rd Q-101. A mutually acceptable Control Plan as described therein 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 COMPOSITION 3.2.1 Volatile Organic Compounds (V.O
6、.C.), max (ASTM 2369, Procedure B) Polyol 0.592 kg/L Polyisocyanate 0.286 kg/L 3.3 PHYSICAL PROPERTIES 3.3.1 Weight per Volume, min (FLTM BI 2-2) Polyol 1.048 kg/L Polyisocyanate 1.052 kg/L ENGINEERING MATERIAL SPECIFICATION ESB-M6J156-A WP 3948-b Page 2 of 5 3.2.2 Viscosity (ASTM D 2196) Polyol 300
7、 - 700 cps Polyisocyanate 100 - 200 cps 3.2.3 Stability (FLTM BI 2-3) 3.2.3.1 Heat Stability Shall not jell, settle, or increase in viscosity in excess 3.2.3.1 Shelf Stability Shall not jell, settle hard, increase in viscosity more than 15 sec on a #4 Ford cup after 90 days at room temperature 26 +/
8、- 1 C. This applies to both polyol and isocyanate stored in separate containers. 3.3 PREPARATION OF TEST PANELS Prepare test panels per FLTM BI 3-2, Method “C“, using the viscosity specified by the supplier and a dry film build of 38 +/- 5 micrometre. 3.3.1 Substrate Thermoplastic panels min size 10
9、0 mm x 150 mm or production level parts representative of production processing. (See Para 5 General Information) 3.3.2 Conductive Primer Apply 38 +/- 5 micrometre of the primer and bake 30 minutes at 65 C. 3.3.3 Frontal Surface Chip Primer Apply 38 +/- 5 micrometre of ESB-M99J344. Flash for 3 minut
10、es max. Also prepare a duplicate set of panels without ESB-M99J344 material. 3.3.4 Current Production Taupe Primer Surfacer (ESB-M6J141 or ESB-M6J152) Apply 30 +/- 5 micrometre of the current production taupe primer wet-on-wet over the frontal surface chip primer. The material shall pass all require
11、ments when baked at both the following schedules: ENGINEERING MATERIAL SPECIFICATION ESB-M6J156-A WP 3948-b Page 3 of 5 Surface Temperature Laboratory Oven* Bake, min 8 minutes at 135 +/- 2 C 15 minutes at 135 +/- 2 C Bake, max 10 minutes at 163 +/- 2 C 30 minutes at 163 +/- 2 C *As specified in FLT
12、M BI 3-2. 3.3.5 Topcoat Requirements The following exterior enamels shall be applied over unsanded primer: Color Test Description Paragraph *Black Enamel Holdout 3.4.4 Water Immersion 3.6.2 *White Enamel All other tests requiring topcoat *Only current production black and white enamels shall be used
13、. Bake the enamel 10 minutes at 129 +/- 2 C part temperature (17 minutes at 129 +/- 2 C laboratory oven). 3.4 APPEARANCE After preparing panels of the material under test and production primer according to para 3.3, the primer under test shall be equal to or better than current approved production m
14、aterials when tested under identical conditions for the following properties. 3.4.1 Color Black (FLTM BI 109-1) 3.4.2 Gloss, min 60 (FLTM BI 10-1, 60 deg Glossmeter) 3.4.3 Leveling The primer film shall level with a minimum of orange peel. The surface of the material under test shall be equal to or
15、better than current approved production material for smoothness when applied and baked under identical conditions. 3.4.4 Holdout There shall be no evidence of dulling or strike-in when enamel color coat is applied over sanded or unsanded primer surfacer, and no difference in gloss of the color coat
16、between sanded and unsanded primer. There shall be no prominence of the sand scratches. Tests shall be made at both minimum and maximum bake cycles. ENGINEERING MATERIAL SPECIFICATION ESB-M6J156-A WP 3948-b Page 4 of 5 3.5 FILM PROPERTIES 3.5.1 Dry Sanding Characteristics The primer, when applied an
17、d baked at both minimum and maximum cycles as outlined in para 3.3.2 shall dry sand (using a new sheet of 320 grit non-stearate filled paper for each panel) smoothly without clogging the paper and with a minimum of sand scratches. The material shall be equivalent in all respects to current approved
18、production primer applied and tested under identical conditions. 3.5.2 Adhesion (FLTM BI 106-1, Method B) Test material versus current approved production primer. No loss of adhesion greater than Fig. 2. 3.5.3 Electrical Conductivity 125 (Ransburg Electro-Coating Corp. Model 236 Sprayability Meter o
19、r Equivalent) 3.6 RESISTANCE PROPERTIES 3.6.1 Chip Resistance (SAE J 400) Chipping shall not exceed rating 4B after 10 cycles. 3.6.2 Water Immersion, min 240 h (FLTM BI 4-2, Procedure A) Panels should be prepared according to para 3.3. Remove parts from the water and immediately scribe an “X“ throug
20、h the finish to the substrate. Dry the scribed area with a paper towel, cloth or air (oil and moisture-free) and immediately apply, with firm thumb pressure a minimum of 1300 mm2 of 3M, 898 tape. Remove the tape by pulling one end at 90 deg angle at moderate speed. The following conditions shall be
21、basis for rejection: Removal of paint beyond 1.6 mm from any scribe line. Any evidence of blistering or dulling of the paint. 3.6.3 Weathering Resistance 3.6.3.1 Florida Exposure Panels prepared as in para 3.3.2, scribed with an X to bare substrate and exposed in the Miami, Florida ambient area at 5
22、 deg facing south for 12 months shall show no blistering, peeling along the scribe marks more than 3 mm total width. ENGINEERING MATERIAL SPECIFICATION ESB-M6J156-A WP 3948-b Page 5 of 5 3.6.3.2 Weatherometer Panels prepared as in par 3.3.2, scribed with an X to bare substrate and exposed to 800 hou
23、rs in the Weatherometer shall show no blistering or peeling along the scribe marks more than 3 mm total width. 3.7 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 maki
24、ng 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 shall notify Purchasing, Toxicology an
25、d 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 imposed by law, regulations or Ford, apply t
26、o 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. 4. APPROVAL OF MATERIALS Materials defined by this specification mu
27、st 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, Design and Materials Engineering activity. Upon request, the Supplier shall submit to the affected Materials Engineering activity its own laboratory report to the specification (test results, not nominal values), the material designation and code number, and test specimens for Ford evaluation. Upon approval, the material will be added to the Engineering Material Approved Source List.
