1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2008 01 24 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.14 & 4 1990 03 01 Released C01031533 C E Herriott, concurred J Schult Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 1 of 6 PAINT, NITROCELLULOSE, A
2、IR DRYING REPAIR, INTERIOR WSK-M4J209-A 1. SCOPE The material defined by this specification is a nitrocellulose lacquer composed of a combination of nitrocellulose, synthetic resin, plasticizers and pigments, suitable for use over baked primer or already painted surfaces. 2. APPLICATION This specifi
3、cation was released originally for material used on visible and non eye level visible interior parts. The material shall be suitable for application by brush and spray. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Compan
4、ys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 FLASH POINT The flash point shall conform to the safety regulations applicable to the plant and/or country where the material shall be used. 3.5 COMPOSITION 3.5.1 Resin Essentially a mixture of nitrocellulose, suitable plasticiz
5、ers, hardeners, and alkyd/polyester modifying resins. 3.5.2 Pigment The pigment shall be balanced and blended so that the finished enamel matches the Master Appearance Sample (MAS) Panel in color and luster and meets the requirements of this specification. ENGINEERING MATERIAL SPECIFICATION WSK-M4J2
6、09-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 6 3.5.3 Solvent The volatile portion shall contain sufficient active solvents to give satisfactory adhesion when the enamel is applied over a previously baked coat of the enamel. The properties of solvents i
7、n the volatile portion shall be arranged so that the enamel will level out satisfactory on spray application. The volatility of the solvents is to be so chosen that the material will give a dry film thickness of 40 micrometer without sagging and with satisfactory freedom from roughness or dry spray.
8、 3.5.4 Specific Composition When it is necessary to obtain specific data regarding material formulation, it is understood that the supplier will furnish such data on request. 3.5.5 Special Data All initial and batch submissions must indicate density and non-volatile content of the material as suppli
9、ed on the sample report. 3.6 PHYSICAL PROPERTIES 3.6.1 Non-volatile Initial Sample +/- 1.0% (FLTM BI 102-01) Minimum solid content for various color classes are shown in tabular form, item 3.8.3. These solid limits apply to enamels adjusted to a delivered viscosity of 120 s Ford Cup 4, at 25 C (FLTM
10、 BI 111-01). 3.6.2 Density, as delivered Initial Sample +/- 0.02 g/mL (ASTM D 1475) 3.6.3 Viscosity (FLTM BI 111-01, Ford Cup 4, 25 C) Viscosity, as delivered 120 s +/- 2 s Viscosity, spray 18 - 25 s 3.6.4 Solvent Compatibility The material as received shall be fully compatible with WSK-M14J247-A Ce
11、llulose Solvent. After diluting the material as received 1 to 1 by volume with this solvent, the viscosity shall be 18 - 25 s, Ford Cup 4, 25 C). It is no cause for rejection when the viscosity of 18 - 25 s is obtained by addition of less than 100% solvent. ENGINEERING MATERIAL SPECIFICATION WSK-M4J
12、209-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 3 of 6 3.6.5 Accelerated Shelf Stability (FLTM BI 102-03) The material shall not gel or liver upon standing. After cooling it must be possible to reduce the material to the desired viscosity as required by item
13、3.6.4. 3.6.6 Shelf Stability During a storage of 3 months at room temperature, the material as received shall not gel or liver upon standing and must be free from settling which cannot be dispersed by normal agitation. The viscosity of the material shall not increase in excess of 10 s (FLTM BI 102-0
14、3, Ford Cup 4, 25 C). 3.6.7 Solvent Emissions, max 0.096 kg/L (ASTM D 3960) This requirement is as determined by the United States Environmental Protection Agency Reference Method #24 but is only applicable to materials used in the USA. 3.7 PREPARATION OF TEST PANELS (FLTM BI 103-02, Method B, b) 3.
15、7.1 Substrate Ford Engineering Approved Standard Steel Test Panels zinc phosphated and prepared in accordance with Ford Manufacturing Standard U-MA18004/U-MA18005 or Equivalent. 3.7.2 Cathodic Electrocoat Ford Engineering approved current production materials. Apply the above primer to a minimum dry
16、 film thickness of 25 micrometer and bake as defined in relevant material specification. 3.7.3 Primer Surfacer Ford Engineering approved current production material. Apply the above primer to a minimum dry film thickness of 30 micrometer, and bake as defined in relevant material specification. Do no
17、t sand the primer surface. 3.7.4 Enamel Apply approved system top coat enamel (reduced with WSK-M14J239-A Xylene to spray viscosity as specified by vendor) relevant in color to material under test, to an enamel dry film thickness of 40 - 50 micrometer. Bake according to item 3.7.5 ENGINEERING MATERI
18、AL SPECIFICATION WSK-M4J209-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 4 of 6 3.7.5 Baking Cycle 3.7.5.1 Standard Bake, Bake 10 minutes at 130 C metal temperature. 3.7.6 Dry sand one end half of panel through enamel to primer using 400 grit paper, blow off w
19、ith compressed air and spray apply the repair material under test to the whole panel area at a film thickness of 30 - 40 micrometer using a viscosity between 18 and 25 s as vendor recommendation. 3.7.7 Stand panels in a well ventilated but dust and draft free area until film dry and hard to touch. 3
20、.8 APPEARANCE 3.8.1 Color (FLTM BI 109-01) Color shall match the approved Master Appearance Sample (MAS) Panel. 3.8.2 Gloss, min 80 units (FLTM BI 110-01, 60 glossmeter) 3.8.3 Table of Solids Class Color % Solids, min 0 Metallic 32 1 Black 32 2 All dark solid colors 32 3 All colors with mainly 32 or
21、ganic pigmentation 4 All colors with mainly 37 inorganic pigments except white colors 5 White and Off White 46 3.8.4 Leveling The surface of the material under test shall be equal to or better than current approved production material for smoothness. 3.8.5 Holdout There shall be no evidence of dulli
22、ng or change of image clarity when enamel color coat is applied over primer surfacer, and no difference in gloss of the color coat between coated primer and coated enamel. There shall be no prominence of sand scratches. ENGINEERING MATERIAL SPECIFICATION WSK-M4J209-A Printed copies are uncontrolled
23、Copyright 2008, Ford Global Technologies, LLC Page 5 of 6 3.9 FILM PROPERTIES 3.9.1 General Appearance The material shall produce a presentable, serviceable film showing no craters, pinholes or abnormal roughness. 3.9.2 Drying (Room Temperature) Dry and Dust Free, 25 minutes after application Polish
24、ability, 16 h after application 3.9.3 Hiding Power, Dry, max 40 micrometer (FLTM BI 158-01) Complete visual hiding 3.10 RESISTANCE PROPERTIES 3.10.1 Paint Adhesion (FLTM BI 106-01, Method B) Method B Grade 0 No chipping 3.10.2 Water Spot Resistance (FLTM BI 113-01) Water Spotting, max discoloration
25、AATCC Rating 4-5 3.11 LIGHT FASTNESS 3.11.1 Accelerated Exposure, min AATCC Rating 5 (SAE J1885) Radiant Exposure 400 KJ/m2 Comparative testing only is permitted. Materials shall only be tested against similar materials of known satisfactory performance. Prior to examination the exposed samples must
26、 be cleaned with approved soap solution. After exposure washed but unpolished exposure samples shall show a minimum change when compared to an unexposed retained master. ENGINEERING MATERIAL SPECIFICATION WSK-M4J209-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page
27、 6 of 6 These samples shall show no color change, or iridescence in excess of specified AATCC rating (AATCC Grey Scale for Evaluating Change in Color, 10 step). Gloss change is not permitted. Spotting is not permitted. Chalking is not permitted. The panels shall be completely free from evidence of c
28、racking, checking, rusting, blistering, and peeling. 3.12 PRODUCTION SAMPLES Production shipments and samples shall be equivalent to approved initial sample in laboratory and production tests. 3.13 PAINT COMPATABILITY Prior to making any changes in properties and/or composition of originally approve
29、d paint, the supplier must certify compliance to all requirements of Direct Glazing System specification (test values, not nominal values) and obtain approval from the responsible Materials Engineering activity. For approved Direct Glazing System contact the responsible Materials Engineering activit
30、y. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 MANUFACTURING ENGINEERING REFERENCES Applicable Process Standard Vehicles which are produced in NAAO C-200 (F) General Painting C-600 (F) Electrocoat PL53-33 (F) Phosphate Vehicles which are produced in EAO C-800 PAINTING -PROCESS
