FORD WSS-M4G362-A2-2005 SEALER HEAT CURING PAINTABLE TO BE USED WITH FORD WSS-M99P1111-A 《可印刷热固化密封胶 与标准FORD WSS-M99P1111-A一起使用 》.pdf

1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2005 03 09 Revised Revised referenced paragraph numbers throughout entire spec; replaced drawing in Figure 1; and deleted Figure 2 M. Mehandru2004 05 27 Activated M. Mehandru Printed copies are uncontrolled Copyright 2005, Ford Global Technolo

2、gies, LLC Page 1 of 7 SEALER, HEAT CURING, PAINTABLE WSS-M4G362-A2 1. SCOPE The material defined by this specification is a heat curing paintable, non-tacky thermosetting sealer. 2. APPLICATION This specification was released originally for material used to seal the roof ditch joint and provide a sm

3、ooth surface for adhesively bonding a roof ditch molding. The material is applied on the sealer deck after vehicle electrocoat. The sealer is paintable and is suitable for use on non-visible exterior surfaces. The sealer has flow properties providing a seal for the metal edge and any potential weld

4、burn through. Note: Flow properties of this material may be adjusted depending on the application and plant conditions. The 45 flow must be specified on the engineering drawing. Material performance limits listed herein are representative of the sealer released for the original application. 3. REQUI

5、REMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 DIMENSIONS As specified on engineering drawing and/or in Trim and Sealer manual 3.3 MATERIAL PROPERTIES 3

6、.3.1 Solids, min 98% (ASTM D 2834, except heat at 102 +/- 3 C for 3 h in a mechanical convection oven) 3.3.2 Ash (based on solids weight) (ISO 3491, Method A, 760 +/- 30 C, reference para 4.2) The ash content tolerance for any one supplier shall be +/- 5% based on the recorded ash content for their

7、originally approved production sample. 3.3.3 Specific Gravity (uncured material) (ASTM D 297, water displacement method: reference para 4.3) The specific gravity tolerance for any one supplier shall be +/- 0.1 based on the recorded specific gravity of their originally approved production sample. ENG

8、INEERING MATERIAL SPECIFICATIONWSS-M4G362-A2 Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 2 of 7 3.3.4 Shelf Life 90 Day Storage Stability at 23 +/- 2 C and 32 +/- 2 C. The supplier shall provide flow properties and cured adhesion data from initial through 90 da

9、ys storage at 23 +/- 2 C and 32 +/- 2 C. Measurements shall be taken at monthly intervals. Data shall be made available to Materials Engineering prior to addition to the Approved Source List. Note: Heat greatly accelerates aging. Storage conditions for materials conforming to the requirements of thi

10、s specification may vary depending on the individual product chemistry. In all cases, shelf life at 23 +/- 2 C shall be a min of 45 d. 3.4 MANUFACTURING PROPERTIES 3.4.1 Flow Properties Horizontal 45 2 - 7 mm * Test Method: Horizontal Panels - Apply a section of sealer 150 x 25 +/- 0.1 to three 300

11、x 100 x 0.80 mm electrocoated steel panels per para 4.5. 45 Panel - Apply a 3.7 cm2section of sealer to the center of three 300 x 100 x 0.80 mm electrocoated panels. Horizontal and 45 Test - Preheat the panels for 15 minutes at 110 +/- 2 C prior to sealer application. This will heat stake the sealer

12、 to the panel. Allow the panels to cool at 23 +/- 2 C for 30 minutes. Scribe the original location of the samples prior to baking. Horizontal Panels - Bake the panels flat per the min bake schedule in para 4.4. Repeat this procedure for the max bake schedule. 45 Panels - Bake the panels at a 45 orie

13、ntation per the min bake schedule in para 4.4. Repeat this procedure for the max bake schedule. Remove panels from oven, cool, and measure material flow from original scribe. Save panels for para 3.5.3. *45 flow will be specified on the engineering drawing and on the part/material control plan. 3.4.

14、2 Curl Test No curl allowed after 2 rebakes. Test Method: Apply a section of sealer 150 x 25 +/- 0.1 to three 300 x 100 x 0.80 mm electrocoated steel panels per para 4.5. Preheat the panels for 15 minutes at 110 +/- 2 C prior to sealer application. This will heat stake the sealer to the panel. Allow

15、 the panels to cool at 23 +/- 2 C for 30 minutes. ENGINEERING MATERIAL SPECIFICATIONWSS-M4G362-A2 Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 3 of 7 Prepare test panels per matrix in Table 1, process number 2. Use current production paint as identified by the a

16、ppropriate engineering office. Record any curling of the film after initial paint application. Using a razor blade, cut through the paint film at one side edge and the top edge of each sample. Subject the panel to an additional basecoat/clearcoat bake. Remove from oven and observe for evidence of cu

17、rling. Repeat this procedure once more for a total of 3 basecoat/clearcoat bakes. Report any evidence of curling and the paint system used. 3.4.3 Bridging, min 10 mm 3.4.3.1 Overlap Joint Test Method: Prepare two test fixtures as shown in Figure 1 using electrocoated panels prepared per para 4.5. FI

18、GURE 1 BRIDGING TEST FIXTURE PREPARATION 100 x 300 mm panel Zero gap 16mm gap Top View Side view of panel overlap with wedged gap SEALER TAPE (Center tape over panel edge) 50 x 300 mm panel (6mm edge bent up 90 degrees to stiffen panel) Spacer to control gap ENGINEERING MATERIAL SPECIFICATIONWSS-M4G

19、362-A2 Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 4 of 7 Apply a 1.8 mm thick and 18 mm wide ribbon of material to each test fixture. . Position ribbon such that it is centered over the panel edge. . Cure one test fixture at the min bake schedule per para 4.4.

20、 Subject the second test fixture to the max bake schedule per para 4.4. . Allow test fixtures to cool for 1 h at 23 +/- 2 C. . Inspect test fixture and measure the maximum gap that material fails to bridges. Any evidence of tearing will constitute a failure. 3.5 ENGINEERING REQUIREMENTS 3.5.1 Adhesi

21、on Shall not be removed in a continuous coherent film when subjected to the following environments. 3.5.1.1 Normal, 24 h at 23 +/- 2 C 3.5.1.2 10 APGE Cycles (FLTM BI 123-01) 3.5.1.3 Thermal Cycle . 4 h at 90 +/- 2 C . 4 h at 38 +/- 1 C and 95 - 100% relative humidity . 16 h at - 30 +/- 1 C . 4 h at

22、 38 +/- 1 C and 95 - 100% relative humidity . 4 h at 90 +/- 2 C . 16 h at - 30 +/- 1 C Sample preparation: SAE J1600, Method B, with the following modifications: . Apply a 75 x 200 mm strip of material along the center line of two electrocoated steel panels prepared per para 4.5. . Cure the material

23、 per bake schedules in para 4.4. Report failure mode. 3.5.2 Low Temperature Resistance No cracking or (FLTM BV 101-02) loss of adhesion Place the panels prepared in para 3.4.1 in the slamming apparatus. Condition 4 h at - 40 +/- 1 C. The panel shall be slammed a total of 20 times. ENGINEERING MATERI

24、AL SPECIFICATIONWSS-M4G362-A2 Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 5 of 7 3.5.3 Compatibility with Production Paints - Initial Requirements No tackiness, staining, discoloration, dulling, softening, paint transfer, significant color shift, difference in

25、orientation of metallic flakes (metallic paints) or other objectionable appearance defects in the paint over the sealer. Note: Evidence of any defects as stated above shall be reviewed with Vehicle Operations and Materials Engineering. Test Method: . Prepare test panels per matrix in Table 1. Use cu

26、rrent production paints as identified by Materials Engineering. (Panels shall be kept horizontal prior to baking, during the painting operation and during cure. Use gas fired oven for paint cure.) . Condition painted panels at 23 +/- 2 C for 4 - 24 h. . After 4 - 24 h at 23 +/- 2 C, perform the foll

27、owing tests on each panel: . Cross hatch adhesion check - FLTM BI 106-01, Method B. . Resistance to Xylene - using a back and forth motion, rub surface of enamel 10 times with a small wad of cheesecloth which has been wetted with xylene. 3.5.4 Compatibility with Production Paints - Weathering Requir

28、ements No tackiness, staining, discoloration, chalking, gloss change or other deleterious effects on topcoats when compared to paint not over sealer. Test Method: . Prepare test panels per matrix in Table 2. Use current production paints as identified by the Body Engineering Office. (Panels shall be

29、 kept horizontal prior to baking, during the painting operation and during cure.) . Condition painted panels at 23 +/- 2 C for 72 h. . Subject panels for each paint/bake condition to each exposure listed below. Retain an unexposed panel as control. 3.5.4.1 Heat Age 14 d at 102 C 3.5.4.2 10 Thermal C

30、ycles (as described in para 3.5.1.3) . After exposure, perform the following evaluation on each panel: . Cross hatch adhesion test per FLTM BI 106-01. . Examine test panels and compare to the control panel and to the paint not over sealer side of the panel for evidence of tackiness, staining, discol

31、oration, gloss change, adhesion loss, or other deleterious effects on top-coats. ENGINEERING MATERIAL SPECIFICATIONWSS-M4G362-A2 Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 6 of 7 3.6 QUALITY Material shall be a homogeneous product. It shall be consistent in co

32、lor and texture, and free from objectionable odors during normal storage. It shall be suitable for the intended application. 3.7 FUNCTIONAL APPROVAL Materials being evaluated for approval to this specification shall be subjected to a production trial. Functional trial results must be approved by the

33、 affected assembly operation and Design Engineering. Results shall be made available to Materials Engineering prior to material approval and release. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1

34、 MECHANICAL CONVECTION OVEN The mechanical convection oven(s) used to cure the material shall be capable of obtaining 205 C metal temperature on body steel (0.8 - 0.9 mm thickness) within 8 - 10 minutes. 4.2 ASH CONTENT, Typical 10% based on solids weight 4.3 SPECIFIC GRAVITY, Typical 1.15 4.4 BAKE

35、SCHEDULES First Min Bake: 8 minutes at 135 +/- 1 C metal temperature (15 minutes total oven time max) Second Min Bake: 10 minutes at 135 +/- 1 C metal temperature (17 minutes total oven time max) Max Bake: 20 minutes at 155 +/- 1 C metal temperature (not less than 30 minutes total oven time) 4.5 SUB

36、STRATES Electrocoat primed steel panel 100 x 300 x 0.80 mm prepared per WSS-M2P180-A performance specification. Use current production paints as identified by Materials Engineering. 4.6 HARDNESS, Typical 50 - 60 (ASTM D 2240, Durometer D) 4.7 CURED TENSILE STRENGTH (without film), typical 2.0 - 5.0

37、MPa (ASTM D 412, Die C, pulled at 500 mm/minute. Cured at min bake schedules per para 4.4. Tested at 23 +/- 2 C) 4.8 CURED ELONGATION (without film), typical 60 - 150% (Tested per para 4.7) ENGINEERING MATERIAL SPECIFICATIONWSS-M4G362-A2 Printed copies are uncontrolled Copyright 2005, Ford Global Te

38、chnologies, LLC Page 7 of 7 TABLE 1 - INITIAL PAINTABILITY MATRIX 1. Materials: Sealer, primer and topcoat as specified 2. Topcoat Colors: White, red, black and silver 3. Panel Preparation: See chart PANEL PREP SEALER GEL* PRIMER THICKNESS (MM) PRIME BAKE* (METAL TEMP) TOPCOAT THICKNESS (MM) - BC/CC

39、 TOPCOAT BAKE* (METAL TEMP) 1 No 0.005 0.03 135 C 8 min 0.025/0.05 141 C 10 min 2 Yes 0.005 0.03 163 C 8 min 0.025/0.05 141 C 10 min 3 No 0.005 0.03 163 C 8 min 0.025/0.05 141 C 10 min 4 No 0.005 0.03 177 C 8 min 0.025/0.05 141 C 10 min 5a No 0.005 0.03 163 C 8 min 0.025/0.05 141 C 10 min 6a No 0.00

40、5 0.03 163 C 8 min 0.025/0.05 141 C 10 min * Sealer gel prior to primer application - 5 minutes at 107 C metal temperature. * Add 121 C for 10 minutes (oven time) ramp up prior top prime bake. * Min and max topcoat bakes may vary depending on the topcoat technology. A Two additional topcoat applicat

41、ions and bakes. B Three additional topcoat applications and bakes. 4. Panel Evaluation and Report: . Primer Appearance Before Topcoat 0 - Uniform good appearance 1 - Crawling/pin holes 2 - Crawling/pin holes and sags . Cross Hatch Adhesion Checks - FLTM BI 106-01 Method B (0.005 - 0.008, 0.013 - 0.0

42、18, and 0.023 - 0.03 mm primer film builds) 0 - 11% topcoat loss . Solvent Resistance Test After Topcoat - 10 Xylene Rubs Record the number of rubs to paint transfer (avoid rubbing over sharp corners and edges) TABLE 2 - WEATHERABILITY PAINT MATRIX 1. Materials: Sealer, primer and topcoat as specifi

43、ed (include current materials during test for comparison) 2. Topcoat Colors: White and silver 3. Panel Preparation: See chart PANEL PREP SEALER GEL* PRIMER THICKNESS (MM) PRIME BAKE* (METAL TEMP) TOPCOAT THICKNESS (MM) - BC/CC TOPCOAT BAKE* (METAL TEMP) 1 No 0.013 135 C 8 min 0.013/0.25 141 C 10 min 2 Yes 0.013 163 C 8 min 0.025/0.05 141 C 10 min * Not required for weathering evaluations. * Add 107 C for 10 minutes (oven time) ramp up prior to prime bake. * A higher topcoat bake can be used if recurs may vary depending on the topcoat technology.