1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 20 N-STATUS No Replacement Named C. Mracna, NA 2004 07 22 Revised Para 3.0 inserted; para 3.4.5, 3.5 & 4 deleted 1974 10 09 Released C2D10-766236-C5 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 o
2、f 2 LAMINATE, SILICONE RUBBER/POLYESTER FABRIC - ESW-M2D251-A INSULATOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a laminate consisting of alternate layers of silicone rubber and polyester fabric. 2. APPLICATION This specification was released originally fo
3、r material (4 ply) used for steering column lower shaft insulators. 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). 3.1 RAW SILICONE COMPOUND 3.1.1 S
4、pecific Gravity 1.18 - 1.22 (ASTM D 792) 3.1.2 Oscillating Disc Rheometer Rheometer data on any lot of material must fall within the limits of the master curve established at initial certification. These curves must be kept on file in the suppliers quality control laboratory. 3.2 MOLDED SILICONE SLA
5、BS 3.2.1 Hardness - Durometer “A“ 65 - 75 (ASTM D 2240) 3.2.2 Tensile Strength, min 1,000 psi (ASTM D 412) (6.9 MPa) Elongation, min 300% 3.2.3 Tear Strength, min 225 lb/in (ASTM D 624, Die “C“) (39 kN/m) 3.2.4 Compression Set, max 75% (ASTM D 395, Method “B“, 70 h at 150 +/- 2 C) ENGINEERING MATERI
6、AL SPECIFICATIONESW-M2D251-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.3 POLYESTER FABRIC 3.3.1 Weight, min 5.8 oz/yd2(FLTM BN 106-01) (0.197 kg/m2) 3.3.2 Bursting Strength, min 180 psi (ASTM D 774) (1.2 MPa) 3.4 LAMINATE 3.4.1 Plies 4 3.4.2 Adhesion
7、, min 15 lb (67 N) (ASTM D 413, Machine method, strip specimen) 3.4.3 Tensile Strength (4 ply), min 750 psi (ASTM D 412, Die “A“, 2 in (50 mm)/min (5.2 MPa) 3.4.4 Heat Aged (ASTM D 573, 70 h at 150 +/- 2 C) Tensile Strength Change, max -5% 3.4.6 Low Temperature Flexibility at -29 C No evidence of crack failure Test Method: Condition for 4 h at -29 C and bend 180 around a 1/2 in (12.7 mm) diameter temperature conditioned mandrel. The sample size shall be 1 x 6 in (25 x 150 mm) x the specified thickness.
