1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2013 02 08 A2/A3 N Status A2 replaced by WSS-M4D1024-A1, A3 replaced by WSS-M4D1025-A1 K. Waugh, 2009 08 20 A1 - N-STATUS No Replacement Named C. Mracna, NA 1977 01 05 Released AG1 6000-179 Controlled document at www.MATS Copyright 201
2、3, Ford Global Technologies, LLC Page 1 of 3 THERMOPLASTIC POLYOLEFIN ELASTOMER, EXTERIOR ESB-M2D246-A1 PAINTABLE - LOW MODULUS NOT TO BE USED FOR NEW DESIGN THERMOPLASTIC POLYOLEFIN ELASTOMER, PAINTABLE ESB-M2D246-A2 INTERMEDIATE MODULUS NOT TO BE USED FOR NEW DESIGN THERMOPLASTIC POLYOLEFIN ELASTO
3、MER, PAINTABLE ESB-M2D246-A3 HIGH MODULUS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by these specifications are thermoplastic modified elastomers. Body components molded or extruded in these materials can maintain class “A“ surfaces and are generally painted body color. 2. APPLICA
4、TION These specifications were released originally for materials used in impact system related components such as bumper sight shields, and may be specified for any applications requiring paintable elastomers within the modulus ranges specified below. Three room temperature (23 C) modulus ranges are
5、 defined. ESB-M2D246-A1 Low Modulus 20,000 psi (138 MPa) max ESB-M2D246-A2 Intermediate Modulus 20,000 50,000 psi (138-345 MPa) ESB-M2D246-A3 High Modulus 50,000 psi (345 MPa) min 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to
6、 the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 MOLDED TEST SLAB The following mechanical properties requirements apply to test specimens prepared from unpainted slabs measuring 0.100 - 0.125 in (2.5 - 3.2 mm) in thickness. Molded slabs must also comply with all “f
7、inished part requirements“ specified in para. 3.2. A1 A2 A3 3.1.1 Hardness - Durometer “D“ 35 - 45 34 - 50 50 - 60 (ASTM D 2240, instantaneous reading) ENGINEERING MATERIAL SPECIFICATION ESB-M2D246-A1/A2/A3 Copyright 2013, Ford Global Technologies, LLC Page 2 of 3 A1 A2 A3 3.1.2 Tensile Strength, ps
8、i (MPa), min 900 (6.2) 1,000 (6.9) 1,500 (10.3) (ASTM D 412, Die “C“) 3.1.2.1 Elongation, %, min 200 70 70 3.1.3 Tear Strength, lb/in (kN/m), min 200 (35) 180 (32) 300 (53) (ASTM D 624, Die “C“) 3.1.4 Flexural Modulus “E“, psi (Mpa) 20,000 max 20,000 50,000 50,000 min (ASTM D 790, tangent, (138 max)
9、 (138 - 345) (345 min) Method “T“, Procedure “B“ room temperature) 3.1.5 Low Temperature -45 -45 -45 Brittleness Point, C max (ASTM D 746) 3.1.6 Ozone Rating (FLTM BP 101-01, sample per ASTM D 412, 100% elongation) ESB-M2D246-A1 ESB-M9P1-A ESB-M2D246-A2 ESB-M9P1-A ESB-M2D246-A3 ESB-M9P1-A 3.1.7 Pain
10、t Staining None None None (ESB-M9P4-A) 3.1.8 Acrylic Staining None None None (ESB-M9P5-A) 3.1.9 Heat Aged (ASTM D 573, 70 h at 100 +/- 1 C) Hardness Durometer “D“ +5 +5 +5 Change, max Tensile Strength Change, % max -30 -30 -30 Elongation Change, % max -40 -40 -50 3.1.10 Surface Resistivity, -cm 3 x
11、104 to 1 x 109 (ASTM D 257, applied voltage 10, 23 C, 50% relative humidity, 30 s) Unless specifically exempted on the part drawing, components molded in materials defined by these specifications shall be paintable by electrostatic deposition and must conform to this surface resistivity requirements
12、 This test is required for initial material qualification only. The Ransburgh Meter No. 236 may be used for quality control purposes with meter readings of 140 desired. A range of 90 minimum and 160 maximum are absolute limits. These tests must be conducted on properly prepared samples. ENGINEERING
13、 MATERIAL SPECIFICATION ESB-M2D246-A1/A2/A3 Copyright 2013, Ford Global Technologies, LLC Page 3 of 3 3.2 FINISHED PART Unless otherwise noted on the engineering drawing, parts molded in materials defined by these specifications must comply with these requirements. 3.2.1 Physical Properties Physical
14、 property requirements on molded parts must be specified on the engineering drawing or on the corresponding engineering specification, along with the locations on the part from which the test specimens are to be prepared. Test specimens may be prepared from parts before or after painting (as specifi
15、ed with the requirements); but once painted, the coating shall not be removed. 3.2.2 Paintability Painted substrate must comply with all requirements of ESB-M2P105-B; Paint Performance, Elastomeric, Exterior. 3.2.4 Special Requirements for Unpainted Surfaces Exposed to Exterior Weathering These requ
16、irements may be waived if all areas of the finished parts exposed to exterior weathering are painted and any unpainted substrate is nonvisible when in vehicle position. 3.2.4.1 Color Stability Rating 3 minimum per AATCC Gray Scale for evaluating change in color after 1,600 h weatherometer exposure p
17、er FLTM BO 101-01 and also after 1 year Florida exposure, 5 south, direct weathering inland. No color tone change or surface crazing and no cracks when bent 90. Slight chalking and slight loss of gloss will be allowed provided an acceptable appearance can be achieved with conventional car finish cle
18、aning materials. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. A1 A2 A3 5.1 SPECIFIC GRAVITY 1.0 1.0 0.9 (ASTM D 792) 5.2 COMPRESSION SET, % 90 95 90 (ASTM D 395, Method “B“, 22 h at 70 C) 5.3 FLEXURAL MODULUS, psi (MPa) (ASTM D 790, tangent, Method “T“, Procedure “B“) . At -30 +/- 1 C 90,000 120,000 200,000 (620) (826) (1379) . At 70 +/- 1 C 5,000 10,000 25,000 (34.4) (69) (172)
