1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 07 28 N-STATUS Replaced by WSS-M11P64-A1/A2/A3 M. Mehandru 2002 10 09 Revised Updated and renumbered 1984 08 11 Released CS01-CR523863-1 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 5 ADHESIVE, H
2、EAT CURING - EPOXY/GLASS FIBER LAMINATE, ESB-M2G281-A METAL REINFORCEMENT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a heat curing, epoxy/fiberglass laminate, supplied in die cut form. Construction consists of woven fiberglass mat onto an epoxy adhesive film
3、 release paper backed. 2. APPLICATION This specification was released originally for material used to reinforce and stiffen sheet metal body panels. This material can be applied to oily cold rolled steel, Zincrometal and galvanized steel surfaces. Recommended minimum material cure temperature is 182
4、 C for 8 min metal temperature. Material high temperature resistance permits application to body components exposed to electrocoat bake ovens. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS
5、 Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 UNCURED MATERIAL PROPERTIES 3.2.1 Construction Construction shall consist of woven fiberglass mat onto an epoxy adhesive film, release paper backed. There shall be
6、 no loose glass fibers after die cut operation. 3.2.2 Thickness 1.27 +/- 0.1 mm or as (ASTM D 461, 85 g load, 25 mm specified on engineering diameter foot, total fiberglass drawing and adhesive) 3.2.3 Stiffness 2 - 20 MPa (ASTM D 747, without release liner) 3.2.4 Formability The material shall not d
7、elaminate or crack when folded 180 upon itself. ENGINEERING MATERIAL SPECIFICATIONESB-M2G281-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 5 3.2.5 Specific Gravity 870 - 100 kg/m3(ASTM C 167) 3.2.6 Tack Adhesion Test The material shall not peel at edges or
8、 fall off from panel. Test Method: . Apply a 1.27 x 100 x 150 mm adhesive laminate strip to the center of a 300 x 300 mm metal panel of each substrate listed in para 4.2. . Pass a 2 kg roller over sample in one forward and reverse direction. . Invert panels immediately after adhesive application and
9、 condition at 23 +/- 2 C for 4 h minimum. . Save panels for Inverted Bake Test, para 3.3.2. 3.2.7 Phosphate Wash Resistance No evidence of material wash off or displacement due to precleaning or phosphating solutions in flow phosphate tanks. 3.2.7.1 Laboratory (FLTM BU 016-01, Method “A“) 3.2.7.2 Fu
10、nctional Materials being evaluated for initial approval to the specification shall be subjected to a production trial in an area intended for use. This trial will be conducted after all other specification requirements have been met including laboratory evaluation for flow phosphate wash resistance.
11、 3.2.8 Electrocoat Compatibility Shall not contaminate (FLTM BN 119-01, use current production electrocoat primer bath cause paints as identified by the Body. electrocoat film irregularities. Materials Engineering Office). 3.2.9 Storage Stability The material shall be stored in sealed packages conta
12、ining desiccant at temperatures below 32 C away from all sources of heat and sunlight. Heat greatly accelerates aging. Under these storage conditions, the shelf life of the material shall be 2 months. When these materials are stored at temperatures below 23 C, they shall be conditioned at room tempe
13、rature prior to application. Adequate conditioning permits the material to obtain its optimum application properties. Materials in opened packages shall be used within 72 hours. 3.2.10 Release Paper Adherence and Removal The release paper shall remain attached to adhesive surface during shipping and
14、 handling. It shall be easily removed from the adhesive without adhesive separation or paper tear. ENGINEERING MATERIAL SPECIFICATIONESB-M2G281-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 5 3.2.11 Packaging The material shall be supplied in sealed packag
15、es containing desiccant. Material blocking or dimensional changes is not permitted during container shipping or storage. 3.3 CURED MATERIAL PROPERTIES 3.3.1 Flexural Strength, min Normal 3.3.1.1 Test at 23 +/- 2 C 180 N 3.3.1.2 Test at 93 +/- 1 C 160 N Environmental Age (Condition for 24 h at 23 +/-
16、 2 C after exposure, then test at 23 +/- 2 C). 3.3.1.3 14 days heat age at 88 +/- 1 C 180 N 3.3.1.4 500 h humidity at 38 +/- 2 C 160 N and 95-100% RH 3.3.1.5 10 cycles: 4 h at 88 +/- 1 C 180 N 4 h humidity (38 +/- 2 C and 95 100% RH), and 16 h at -29 +/- 1 C 3.3.1.6 72 h at 41 +/- 1 C 180 N (Adhesiv
17、e storage only prior to bonding) Test Method: . Apply a 1.27 x 25 x 152 mm adhesive laminate strip to a 0.81 x 25 x 152 mm panel of each substrate listed in para 4.2. . Pass a 2 kg roller over sample in one forward and reverse direction. . Cure test samples per the process bake schedules, para 4.3.
18、. After exposure to each test condition, place test samples in the fixture shown below. . Conduct flexural strength test at a crosshead rate of 5 mm/min. . Record the peak load value. A minimum of 3 samples per test condition shall be evaluated. ENGINEERING MATERIAL SPECIFICATIONESB-M2G281-A Printed
19、 copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 FLEXURAL STRENGTH TEST FIXTURE 3.3.2 Inverted Bake The material shall not peel at edges or fall off from panel. Test Method: . Subject the panels prepared per para 3.2.6 to an inverted bake. . Maintain adhesive in the
20、 inverted position and expose the panels to the process bake conditions per para 4.3. . Save samples for Cold Slam Test para 3.3.3. 3.3.3 Cold Slam (FLTM BN 1-2, 10 cycles of 6 slams at -29 +/- 2 C, subject the panels prepared per para 3.3.2.) The material shall not crack or separate from panel. 3.4
21、 FUNCTIONAL APPROVAL Material being evaluated for initial approval to this specification shall be subjected to a production trial. Functional trial results should be available to design and materials engineering prior to material approval and release. ENGINEERING MATERIAL SPECIFICATIONESB-M2G281-A P
22、rinted copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 MECHANICAL CONVECTION OVEN The mechanical oven(s) used to cu
23、re the material shall be capable of obtaining 204 C metal temperature on body steel (0.89 mm thickness) within 8-10 min. 4.2 SUBSTRATES 4.2.1 CRLC steel meeting ESB-M1A250-A: Nominal 0.81 mm thickness surface precoated with M99C47-A mineral oil applied at 0.012 - 0.025 mm wet thickness. 4.2.2 Steel-
24、sheet, zinc rich primer coated (ESB-M1A217): Nominal 0.81 mm thickness - surface precoated with M99C47-A mineral oil applied at 0.012 - 0.025 mm wet thickness. 4.2.3 Galvanized steel meeting ESB-M1A250-A3 (G90 hot dipped): Nominal 0.81 mm thickness - surface precoated with M99C47-A mineral oil appli
25、ed at 0.012 - 0.025 mm wet thickness. 4.3 PROCESS BAKE SCHEDULES 4.3.1 Minimum: 182 C for 10 min. metal temperature 4.3.2 Maximum: 204 C for 30 min. metal temperature 4.4 EPOXY PHYSICAL PROPERTIES 4.4.1 Tensile Strength at Break 19 - 24 MPa (ASTM D 638) 4.4.2 Elongation at Break 1.0 - 2.5% (ASTM D 6
26、38) 4.4.3 Modulus of Elasticity 14 - 22 kPa (ASTM D 638) 4.4.4 Coefficient of Thermal Expansion 5.5 x 10-5cm/cm/C (ASTM D 696) 4.4.5 Water Absorption 0.25 - 0.45% (ASTM D 570, 24 h immersion, 50 mm diameter disk, 1.27 mm thickness) 4.4.6 Shrinkage During Cure 1 - 2% (ASTM D 471) 4.4.7 Izod Impact 0.11 - 0.16 J/mm (ASTM D 256, Method A, unnotched either side, 3.2 mm thickness sample)
