1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 21 N-STATUS No Replacement Named, No known use C. Mracna, NA 2004 10 18 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.11 & 4 1994 09 30 Released NGA1E10370437009 D. Spanos L. Gullen Printed copies are uncontrolled Copyright 2009, Ford
2、 Global Technologies, LLC Page 1 of 3 THERMOPLASTIC POLYOLEFIN ELASTOMER (TEO), WSL-M2D476-A 100% RECYCLED RUBBER MODIFIED, 50% MINIMUM RECYCLED CONTENT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic polyolefin elastomer (TEO) molding compound, m
3、odified with 50% minimum of rubber from used tires. The predominant ingredient in the recycled rubber is styrenebutadiene rubber (SBR). 2. APPLICATION This specification was released originally for material used in the manufacture of molded brake/clutch pedal pads. 3. REQUIREMENTS 3.0 STANDARD REQUI
4、REMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MATERIAL TESTING 3.4.1 Preparation of Test Specimens Whenever possible, all test specimens shall be die-cut from the finished parts
5、 When not feasible, specimens cut from molded test sheets manufactured from the same material and with equivalent cure to molded parts are recommended. The test sheets shall have the following dimensions: 150 x 150 mm, min x 2.0 +/- 0.2 mm 3.5 ORIGINAL PROPERTIES 3.5.1 Density 1.00 +/- 0.02 g/cm3(I
6、SO 1183, Method A/ASTM D 297) 3.5.2 Hardness, Durometer A 70 +/- 5 (ISO 868/ASTM D 2240, 15 s delay) 3.5.3 Tensile Strength, min 3.2 MPa (ISO 37/ASTM D 412, Die C) 3.5.4 Elongation at Break, min 200% (Test Method according to para 3.5.3) 3.5.5 Modulus at 100% Elongation 2.7 MPa (Test Method accordin
7、g to para 3.5.3) ENGINEERING MATERIAL SPECIFICATIONWSL-M2D476-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 3 3.5.6 Tear Strength, min 30 kN/m (ISO 34, Method B, procedure (a)/ ASTM D 624, Die C) 3.5.7 Cold Flexibility at -40 +/- 1 C No cracking (FLTM BN 10
8、2-01, except 25 x 98 mm sample) 3.5.8 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) 3.5.9 Compression Set, max 75% (ISO 815/ASTM D 395, Method B, except 25% compression, plied-up specimens, 70 h at 70 +/- 2 C) 3.6 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 168 h at 70 +/
9、 2 C) 3.6.1 Hardness Change, max +/- 3 3.6.2 Tensile Strength Change, max +/- 15% 3.6.3 Elongation Change, max +/- 25% 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 70 +/- 2 C) 3.7.1 Har
10、dness Change, max +/- 3 3.7.2 Tensile Strength Change, max +/- 25 3.7.3 Elongation Change, max +/- 35 3.7.4 Visual Evaluation No surface tackiness or cracks when folded flat against itself. 3.8 ABRASION RESISTANCE (FLTM BN 108-02, CS-10 wheels, 500 g load) Weight Loss After 2000 Cycles, max 0.10 g 3
11、9 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute ENGINEERING MATERIAL SPECIFICATIONWSL-M2D476-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 3 3.10 FOGGING (FLTM BO 116-03) Fog Number, min 70 Formation of a clear film, droplets or crystals is cause for rejection. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 SHRINKAGE, max 5% Perform on specimens taken from finished parts. 5.2 RECYCLING CODE (PP+EPDM)+SBR
