1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Action Revisions 2014 10 17 N Status No replacement named L. Sinclair, NA 2003 04 28 Revised Rev para 3.4, para 3.0 inserted, para 3.1, 3.2, 3.18 and 4 deleted S. Harris, J. Crist 1985 02 15 CAP1-AF 528445, Released Page 1 o
2、f 5 Copyright 2014, Ford Global Technologies, Inc. SEALER, ELASTOMERIC TAPE FORM, NON-WELDABLE ESB-M4G267-A HEAT EXPANDING (MEDIUM EXPANSION) NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an extruded tape form pressure sensitive heat expanding EPDM base sealer.
3、 It incorporates an ethylene vinyl acetate film on one side to facilitate application of the sealer to the sheet metal. 2. APPLICATION This specification was released originally for material used in the Body Shop for sealing weld joints and openings where welding was not a requirement. It has an agg
4、ressive pressure sensitive adhesive which promotes adhesion to oiled CRLC steel surfaces. The material expands during the electrocoat bake schedules noted per para 5.4. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Compan
5、ys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.3 DIMENSIONS As specified on the Engineering Drawing and/or Weld Sealer Manual. 3.4 CONSISTENCY (ASTM D5 150 g total weight) Initial and after material aged 80 - 120 72 h at 45 +/- 2 C 3.5 SOLIDS, min 95% (ASTM D 2834, except heat
6、 at 102 +/- 2 C for 3 h in a mechanical convection oven) ENGINEERING MATERIAL SPECIFICATION ESB-M4G267-A Page 2 of 5 Copyright 2014, Ford Global Technologies, Inc. 3.6 SPECIFIC GRAVITY 1.2 +/- 0.25 (ASTM D 297, hydrostatic method 3.7 VOLUME EXPANSION (FLTM BV 108-02) 3.7.1 At 135 C 20 - 60% 3.7.2 At
7、 205 C 60 - 120% 3.8 WATER ABSORPTION, %, max (FLTM BV 117-01) 3.8.1 Method A Less than 2% 3.8.2 Method B Less than 2% 3.9 BRIDGING, max 2.0 mm Test Method: Position a 150 mm length strip of material over the holes in the fixture shown below. Prepare two assemblies and condition at 23 +/- 2 C for 1
8、h. Subject one assembly to each material cure schedule per para 5.3. BRIDGING TEST FIXTURE ENGINEERING MATERIAL SPECIFICATION ESB-M4G267-A Page 3 of 5 Copyright 2014, Ford Global Technologies, Inc. 3.10 SAG RESISTANCE, max 6 mm (FLTM BV 118-01, substrate per para 5.2, material cure schedules per par
9、a 5.4) 3.11 CURE CHARACTERISTICS No evidence of cracking, charring, embrittlement, loss of adhesion to oily metal, or loss of sealer flexibility. Test Method: Apply two 200 mm length ribbons of material to each of two 0.89 x 100 x 300 mm steel panels per para 5.2 and condition panels at 23 C +/- 2 C
10、 for 1 h. Bake one panel at each material cure schedule per para 5.4. Position panels in a horizontal attitude during material bake. After bake, condition panels at 23 +/- 2 C for 4 h min. Evaluate adhesion by inserting the tip of a sharp spatula under the end of the material strip. Grasp the tab of
11、 sealer and attempt to peel at 180. The material strip shall not be removable in a continuous coherent film. Observe for any indication that the material fails to adhere to the substrate or is brittle or friable. 3.12 LOW TEMPERATURE RESISTANCE No cracking or adhesion failure Test Method: Prepare tw
12、o 0.89 x 100 x 300 mm test panels para 3.11. Condition the panels in a mechanical convection oven at 70 +/- 2 C for 7 days. Condition the samples at 23 +/- 2 C for 1 hour. Place the panels in the slamming apparatus (FLTM BV 101-02) at - 29 +/- 2 C for 4 hours. Slam each panel a total of 10 times. 3.
13、13 RESISTANCE TO CORROSION 500 h (ASTM B 117) No loss of adhesion or blistering of the material and no evidence of corrosion on the metal surface when subjected to salt spray. Test Method: Apply a 150 mm length strip of material at the edge of two 0.89 x 75 x 150 mm oily steel panels. Sandwich the m
14、aterial with another steel panel as shown in drawing below and weld at intervals indicated. Cure two samples at each of the bake schedules indicated in para 5.4. Subject the cured assemblies to 55 h salt spray per ASTM B 117. After exposure, condition assemblies at 23 +/- 2 C for 24 h min. Disassemb
15、le panels and examine metal surfaces under sealer for evidence of corrosion. ENGINEERING MATERIAL SPECIFICATION ESB-M4G267-A Page 4 of 5 Copyright 2014, Ford Global Technologies, Inc. CORROSION TEST ASSEMBLY 3.14 ELECTROCOAT COMPATIBILITY (FLTM BV 119-01) Shall not contaminate electrocoat primer bat
16、h or cause electrocoat film irregularities. 3.15 UNCURED ADHESION AND RELEASE PAPER REMOVAL The sealer shall adhere when hand applied to oily steel surfaces. The material shall be capable of having the release paper backing removed without distorting the shape of the sealer. 3.16 STORAGE STABILITY S
17、hall be stored below 41 C away from all sources of heat and sunlight. Under these storage conditions, the shelf life of the material shall be 3 months. When these materials are stored at temperatures below 23 C, they shall be conditioned at room temperature prior to application. Adequate conditionin
18、g permits the material to obtain it optimum application properties. ENGINEERING MATERIAL SPECIFICATION ESB-M4G267-A Page 5 of 5 Copyright 2014, Ford Global Technologies, Inc. 3.17 FUNCTIONAL TRIAL Materials being evaluated for approval to this specification shall be subjected to a production trial.
19、Final approval for appearance is the responsibility of appropriate Body and Assembly and Design Center personnel. Functional trial results should be made available to Design and Materials Engineering prior to releasing the materials specification. 5. GENERAL INFORMATION The information given below i
20、s provided for clarification and assistance in meeting the requirements of this specification. 5.1 MECHANICAL CONVECTION OVEN The mechanical convection oven(s) used to cure the material shall be capable of achieving 205 C metal temperature on body steel (0.8 - 0.9 mm thickness) within 8 - 10 min. 5.
21、2 SUBSTRATES 5.2.1 CRLC Steel: 0.89 mm thickness - Surface precoated with M99C47-A mineral oil at a application of approximately 2.2 cm/m2. 5.3 TEST MATERIAL THICKNESS Sample material submitted for evaluation to this specification shall be 1.3 - 1.8 mm thickness. 5.4 MATERIAL CURE SCHEDULES 5.4.1 Minimum: 135 C metal temperature - 8 min. 5.4.2 Maximum: 205 C metal temperature - 30 min.
