1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 20 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.6, 3.7 & 4 deleted 1991 04 22 Released C10105850 B HennesseyPrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 2 POLYURETHANE (PUR) FOAM, MICROCEL
2、LULAR, WSD-M2D411-A SHOCK AND VIBRATION ISOLATING 1. SCOPE The material defined by this specification is a closed-cell elastic microcellular polyurethane. 2. APPLICATION This specification was released originally for material used for compliance bushes in tie bar mountings, and similar heavy duty sh
3、ock and vibration isolation purposes. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 APPEARANCE The foam shall have a homogeneous microcellular
4、cell structure with no large voids, cracks, hard spots or foreign matter which may impair the serviceability of the part or affect the load/deflection and fatigue performance. 3.5 TEST SPECIMEN The following material properties shall be determined on specimens taken from the core 6 - 10 mm from the
5、surface skin, unless other- wise specified. These specimens shall be free of voids, hard spots and densification lines. 3.5.1 Density, kg/m3400 - 700 kg/m3(ISO 845/ASTM D 3574, Test A) 3.5.2 Tensile Strength, min 3.3 MPa (ISO 1798/ASTM D 3574, Test E, 100 +/- 20 mm/minute test speed, 50 mm bench mar
6、ks, 5 specimens minimum) 3.5.2.1 Elongation at Break, min 300% (Test according to 3.5.2) 3.5.3 Compression Set, max 10% (ISO 1856, Method A/ASTM D 3574, Test D, ct calculation, 22 h at 70 +/- 2 C, 50% deflection, 3 specimens minimum) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D411-APrinted copies are u
7、ncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 2 3.5.4 Compression Deflection Stress Density Compression (ISO 3386/2 at 40% compression, Range Stress except specimen size 50 x 50 x 25 mm and evaluation of the 400 - 500 400 - 1000 first deflection plot, 100 +/- 500 - 600 800 - 16
8、00 20 mm/minute test speed.) 600 - 700 1200 - 2400 3.5.5 Heat Aging (ISO 2440/ASTM D 3574, Test K, 24 h at 140 +/- 2 C) Tensile Strength Change, max -15% Elongation at Break Change, max -10% 3.5.6 Humidity Aging (Autoclave) (ISO 2440/ASTM D 3574, Test J, 5 h at 120 +/- 2 C) Tensile Strength Change,
9、max -30% Elongation at Break Change, max -20% 3.5.7 Immersion in ASTM Oil No. 1 (ISO 1817/ASTM D 471, 70 h at 100 +/- 2 C) Tensile Strength Change, max -25% Elongation at Break Change, max -15% Length Change, max +/- 2% (ISO 1923, sample 150 x 25 x 6 mm) 3.5.8 Immersion in ASTM Oil No. 3 (ISO 1817/A
10、STM D 471, 70 h at 100 +/- 2 C) Tensile Strength Change, max -25% Elongation at Break Change, max -20% Length Change, max +/- 6% (Method as 3.5.7) 3.5.9 Rebound Resilience 45 - 60% (ASTM D 3574, Test H at 23 +/- 1 C, specimen 100 x 100 mm plied up to 12 mm) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 Color can be natural or as stated on the Engineering Drawing. Parts may be colored by dyeing to identify the hardness category into which they fall.
