1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 10 22 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7 & 4 1999 07 29 Activated T. Horoszy Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 3 POLYURETHANE (PUR) FOAM, MICROCELLULAR, WSS-M2D502-A
2、 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 body mount bushings. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERI
3、ALS 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 cell structure with no large voids, cracks, hard spots or foreign matter which may impair the service
4、ability 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 molded test panels 6 - 10 mm in thickness and with molded surfaces retained (ASTM D 3489). These specimens shall be free of voids
5、 hard spots and densification lines. 3.5.1 Density, kg/m3480 - 520 kg/m3(ISO 845/ASTM D 3574, Test A) 3.5.2 Tensile Strength, min 5.0 MPa (ISO 1798/ASTM D 3574, Test E, 100 +/- 20 mm/minute test speed, 5 specimens minimum) 3.5.2.1 Elongation at Break, min 400% (Test according to 3.5.2) 3.5.3 Compre
6、ssion Set 3.5.3.1 ISO 1856, Method A/ 10% max ASTM D 3574, Test D, ct calculation, 22 h at 70 +/- 2 C, 50% deflection, 3 specimens minimum) ENGINEERING MATERIAL SPECIFICATIONWSS-M2D502-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 3 3.5.3.2 Method B/ASTM D
7、395, 22 h 35% max at 100 +/- 2 C, 25% deflection, 3 specimens minimum) 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 first deflection plot, 100 500 - 600 800 - 1600 +/- 20 mm/minute test
8、 speed.) 3.5.5 Heat Aging (ISO 2440/ASTM D 3574, Test K, 24 h at 140 +/- 2 C) Tensile Strength Change, max -10% Elongation at Break Change, max -10% 3.5.6 Hydrolytic Stability (ASTM D 3137, 8 weeks at 95 - 100RH and 70 C in closely controlled humidity chamber, such as Blue M Electric model AC-7502TD
9、A-4) Tensile Change, max -35% Elongation Change, max -35% 3.5.7 Tear Strength, min 10 N/mm (ASTM D 3574, Test F) 3.5.8 Immersion in ASTM Oil No. 903 (ISO 1817/ASTM D 471, 70 h at 100 +/- 2 C) Tensile Strength Change, max -25% Elongation at Break Change, max -20% Length Change, max +/- 2% (Method as
10、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) 3.5.10 Low Temperature Flexibility No Cracks (Tensile dumbbell specimen per ASTM D 3574, Test E. Bend around a 25 mm mandrel after 5 h at -40 C) ENGINEERING MATERIAL SPECIFICATIONWSS
11、M2D502-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 3 3.5.11 Water Absorption Weight gain, max. 40% (ASTM D 1667, Suffix L method, test specimen to be as molded panel with surface skin intact. Calculate results in terms of per cent weight gain.) 5. GENERA
12、L 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. 5.2 Humidity Aging (Autoclave) (ISO 2440/ASTM D 3574, Test J, 5 h at 120 +/- 2 C) Tensile Strength Change, max -30% Elongation at Break Change, max -20%
