1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 25 N-STATUS No replacement named C. Mracna, NA 2004 07 26 Revised Para 3.0 inserted; para 3.5.2, 3.6 & 4 deleted 1978 03 08 Released CAG2-823224-C5 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of
2、 3 POLYURETHANE MOLDING COMPOUND, MODIFIED - ESW-M2D234-A POLYETHER BASED POLYURETHANE MOLDING COMPOUND, MODIFIED - ESW-M2D234-B POLYETHER BASED NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by these specifications is a modified polyether based urethane compound with excellent hydrolyt
3、ic stability and heat resistance. 2. APPLICATION These specifications were released originally for material used in transmission bellcrank grommets where toughness, vibration and shock insulation is required at elevated temperatures. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS
4、 Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1 RAW MATERIAL ESW-M2D234-A ESW-M2D234-B 3.1.1 Specific Gravity 1.14-1.18 1.14-1.18 (ASTM D792) 3.1.2 Molding Moisture 0.25 0.25 Content, % max 3.2 MOLDED TEST SPECI
5、MEN AT 23 +/- 2 C 3.2.1 Hardness, Durometer “D“ 50-56 53-59 (ASTM D2240) 3.2.2 Tensile Modulus, MPa, min (ASTM D412, Ring type specimen, inside diameter 16.25 +/- 0.25 mm, radial width 1.02 +/- 0.025 mm, thickness 1.02/3.05 mm, cross head speed 500 mm/min) At 25% Elongation 6.3 10.3 At 50% Elongatio
6、n 10.3 13.8 At 100% Elongation 13.1 17.2 At 300% Elongation 19.3 23.4 At Break 27.6 29.0 Elongation at Break, 350 350 % min ENGINEERING MATERIAL SPECIFICATIONESW-M2D234-A/B Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 3 ESW-M2D234-A ESW-M2D234-B 3.2.3 Tensi
7、le Set at 20 20 100% Strain, % max (ASTM D412, Die “C“) 3.2.4 Compression Set, 90 90 % max (ASTM D395, Plied discs, 22 h at 125 C) 3.2.5 Tear Strength, kN/m, min 105 123 (ASTM D624, Die “C“) 3.2.6 Hydrolytic Stability -20 -20 Change, % max Test Method: The ring type tensile specimens shall be placed
8、 in a 118 cm3open top jar which is placed in a 946 cm3screw cap jar containing 150 cm3of distilled water. The screw cap jar is secured and placed in a circulating air oven for 96 +/- 1 h at 82 +/- 1 C. Specimens are removed, conditioned for 24 +/- 0.5 h at 50% +/- 5% R.H. and 23 +/- 2 C. Tensile mod
9、ulus is to be determined per para 3.2.2 and percent change reported. 3.2.7 Ozone Rating 0 0 (FLTM BP 101-01), max 3.3 MOLDED TEST SPECIMEN AT ELEVATED TEMPERATURES ESW-M2D234-A - Test at 125 +/- 2 C ESW-M2D234-B - Test at 150 +/- 2 C 3.3.1 Tensile Modulus, MPa, min (ASTM D412, Ring type specimen ins
10、ide diameter 16.25 +/- 0.25 mm, radial width 1.02 +/- 0.025 mm, thickness 1.02/3.05 mm, cross head speed 500 mm/min) At 25% Elongation 2.8 4.5 At 50% Elongation 4.1 4.8 At 100% Elongation 4.8 5.3 At 300% Elongation 6.3 - At Break 7.6 6.3 Elongation at Break, 300 250 % min 3.3.2 Tensile Set at 100% 2
11、0 40 Strain, %max (ASTM D412, Die “C“) (After the required 10 min rest period, remove tests specimen from heating apparatus and immediately determine tensile set.) ENGINEERING MATERIAL SPECIFICATIONESW-M2D234-A/B Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of
12、 3 ESW-M2D234-A ESW-M2D234-B 3.3.3 Tear Strength, kN/m, min 44 31 (ASTM D624, Die “C“) 3.4 HEAT AGING ON MOLDED TEST SPECIMENS (ASTM D573, 120 h) ESW-M2D234-A - At 125 +/- 2 C ESW-M2D234-B - At 150 +/- 2 C 3.4.1 Tensile Modulus Change, % max (ASTM D412, Die “C“, 500 mm/min) At 25% Elongation -10 -10
13、 At 50% Elongation -10 -10 At 100% Elongation -10 -10 At 300% Elongation -20 -40 At Break -35 -60 Elongation at Break -10 -20 Change, % max 3.4.2 Hardness, Durometer +/- 5 +/- 5 “D“ Change 3.4.3 Tear Strength -20 -25 Change, % max 3.5 MOLDED PART 3.5.1 Specific Gravity 1.14 - 1.18 1.14 - 1.18 (ASTM D792)
