1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 0 2012 07 18 Activated C. Mracna, NA Controlled document at www.MATS Copyright 2012, Ford Global Technologies, LLC Page 1 of 2 POLYURETHANE (PUR) FOAM, MICROCELLULAR, WSS-M2D515-A SHOCK AND VIBRATION ISOLATING, MEDIUM DENSITY 1. SCOPE Th
2、e material defined by this specification is a closed-cell elastic microcellular polyurethane. 2. APPLICATION This specification was released originally for material used for jounce bumpers, spring isolators, and similar heavy duty shock and vibration isolation purposes. 3. REQUIREMENTS 3.1 STANDARD
3、REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 APPEARANCE The foam shall have a homogeneous microcellular cell structure with no large voids, cracks, hard spots or foreign m
4、atter which may impair the serviceability of the part or affect the load/deflection and fatigue performance. 3.3 TEST SPECIMEN The following material properties shall be determined on specimens taken from molded test panels 10 14 mm in thickness and with molded surfaces retained (ASTM D 3489). These
5、 specimens shall be free of voids, hard spots and densification lines. Test panels are to be nominal density of 500 kg/m3. 3.3.1 Density, kg/m3 350 650 kg/m3(ISO 845/ASTM D 3574, Test A) 3.3.2 Tensile Strength 4.3 MPa min (ISO 1798/ASTM D 3574, Test E 100 20 mm/minute test speed, 50 mm bench marks,
6、5 specimens minimum) 3.3.2.1 Elongation at Break, 480% min (Test according to 3.3.2) 3.3.3 Compression Set 3.3.3.1 ISO 1856, Method A/ASTM D 3574, 9% max Test D, ct calculation, 22 h at 70 2 C, 50% deflection, 3 specimens minimum) ENGINEERING MATERIAL SPECIFICATION WSS-M2D515-A Copyright 2012, Ford
7、Global Technologies, LLC Page 2 of 2 3.3.3.2 ASTM D3574, Test D Modified, 15 %max ct calculation, 22 h at 90 2 C, 50% deflection, 3 specimens minimum) 3.3.4 Compression Deflection Stress 800 1600 MPa (ISO 3386/2 at 40% compression, Compression Stress except specimen size 50 x 50 x 25 mm and evaluati
8、on of the first deflection plot, 100 20 mm/minute test speed.) 3.3.5 Hydrolytic Stability (ASTM D3137, 8 weeks at 95 100 RH, and 70 2 C in closely controlled humidity chamber such as Blue M Electric Model AC-7502TDA-4) Tensile Strength Change -50% max Elongation at Break Change. -35% max 3.3.6 Immer
9、sion in ASTM Oil No. 1 (ISO 1817/ASTM D 471, 70 h at 100 2 C) Tensile Strength Change -25% max Elongation at Break Change -15% max Length Change (ASTM D3574, Test F) -2 to +2 % 3.3.7 Immersion in ASTM Oil No. 3 (ISO 1817/ASTM D 471, 70 h at 100 2 C) Tensile Strength Change -15% max Elongation at Bre
10、ak Change -15% max Length Change (ASTM D3574, Test F) -6 to +6 % 3.3.8 Rebound Resilience 45 60 %(ASTM D3574, Test H at 23 1 C, specimen 100 x 100 mm plied up to 12 mm) 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for questions concerning Engineering Material Specifications. 4.1 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.
