1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 21 N-STATUS No Replacement Named C. Mracna, NA 2004 07 16 Revised Para 3.0 inserted; para 3.1, 3.4 & 4 deleted 1984 05 02 Released C701-DR 524565 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 3
2、 POLYURETHANE, MICROCELLULAR ELASTOMER - RIM - ESB-M2D263-A4 EXTERIOR - PAINTABLE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 345 MPa room temperature flexural modulus Reaction Injection Molded (RIM) thermosetting polyurethane elastomer. 2. APPLICATION This
3、 specification was released originally for bumper covers and fascia applications that require improved dimensional thermal stability. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Produc
4、tion Materials (WSS-M99P1111-A). 3.2 TEST SPECIMENS The following requirements are intended for initial source qualifications, and Initial Sample Inspection Report. These will be rechecked at intervals specified by Quality Assurance. 3.2.1 Preparation of Test Specimens Test specimens may be obtained
5、 from slab stock and/or unpainted production parts. 3.2.2 Conditioning and Test Conditions All test values indicated herein are based on material conditioned in a controlled atmosphere of 23 +/- 2 C and 50 +/- 5% relative humidity for not less than 24 h prior to testing and tested under the same con
6、ditions unless otherwise specified. 3.2.3 Specific Gravity 0.93 - 1.12 (ASTM D 792) 3.2.4 Tensile Strength, min 19.5 MPa (ASTM D 412, Die “C“, 508 mm/min) Elongation, min 150% 3.2.5 Tear Strength, min 61.3 N/mm (ASTM D 624, Die “C“, 508 mm/min) ENGINEERING MATERIAL SPECIFICATIONESB-M2D263-A4Printed
7、copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.2.6 Flexural Modulus (ASTM D 790, Method I, Procedure B) . At 30 C, max 1275 MPa . At 23 C 310 - 450 MPa . At 70 C, min 143 MPa 3.2.7 Aged 7 days at 102 C Tensile Strength Change, max -15% Elongation Change, max -5%
8、Hardness Change +/- 5 3.2.8 Aged 30 minutes at 149 C Tensile Strength Change, max -25% Elongation Change, max -5% Hardness Change -15 to +5 3.2.9 Water Absorption, by weight, max (FLTM BO 129-02) . After 24 h 3.5% . After 240 h 5.0% 3.2.10 Water Immersion Dimensional Stability, Expansion, max (FLTM
9、BO 129-01) . After 240 h 0.015 mm/mm 3.2.11 Water Immersion Warp Test, Warp Height, max (FLTM BO 29-3) . After 24 h 19 mm . After 240 h 28 mm 3.3 MOLDED PART 3.3.1 Appearance Shall be uniform in density, texture and finish, free of visible porosity, warpage, heat scorch, checks, cracks, chipped edge
10、s and uneven surfaces. Shall be free of other contamination. ENGINEERING MATERIAL SPECIFICATIONESB-M2D263-A4Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.3.2 Decorability Parts fabricated from materials defined by this specification requiring a decorativ
11、e coating (paint, etc.) must meet the engineering performance specification requirements shown on the drawing. All decorative coating materials must be approved and released for use by the affected product engineering office. 3.3.3 Additional Requirements Specific requirements for physical propertie
12、s of molded or extruded parts shall be specified on the engineering drawing and/or engineering part specification. All critical areas with respect to these properties shall be clearly designated on the engineering drawing. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 HARDNESS, DUROMETER “D“ 50 - 70 (ASTM D 2240) 5.2 MOLD SHRINKAGE 0.011 - 0.016 (ASTM D 955) mm/mm 5.3 COEFFICIENT OF LINEAR THERMAL EXPANSION 13 - 18 x (ASTM D 696) 10-5/C
