1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 05 05 N-STATUS Replaced by WSS-M99P32-B; Ins 3.0; Del 3.1, 3.2, 3.3, 3.8, 3.9 & 4 A. Reaume 1995 09 07 Activated L. Gullen Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 3 INSULATOR, HEAT SHIELD, S
2、ILICONE FOAM, WSL-M99G163-A2 MEDIUM DENSITY, FIBERGLASS MAT NOT TO BE USED FOR NEW DESIGN 1. SCOPE This specification covers a medium density modified closed cell silicone foam cast directly onto silicone impregnated fiberglass mat without the use of adhesives. A second fiberglass mat may be applied
3、 to the cast foam as required. The material is self extinguishing, has low compression set and is suitable in static applications from -55 C to 260 C. 2. APPLICATION This specification was released originally for fuel tank heat shield applications. 3. REQUIREMENTS Material specification requirements
4、 are to be used for initial qualification of materials. 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 DYNAMIC MECHANICAL ANALYSIS (ASTM D 4065) Ford Motor Comp
5、any, at its option, may establish a shear modulus/damping vs. temperature curves plotted for -50 to +150 C temperature range for material/parts supplied to this specification. The shear modulus and damping curves established for initial approval shall constitute the reference standard and shall be k
6、ept on file at the designated material laboratory. All samples shall produce shear modulus and damping curves that correspond to the reference standard when tested under the same conditions. 3.5 REQUIREMENTS FOR SILICONE FOAM 3.5.1 Density, max 467 kg/m3Density shall be determined by cutting a 150 x
7、 150 +/- 0.8 mm specimen and weighing it to 0.25 grams. Thickness shall be determined with a dial micrometre having minimum pressure foot diameters of 25 mm or similar averaging procedure. Density shall be calculated as follows: Density kg/m3= weight (in grams) (thickness, in mm x 12.5) ENGINEERING
8、MATERIAL SPECIFICATIONWSL-M99G163-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 3 3.5.2 Tensile Strength, min 240 kPa (ASTM D 412) Elongation, min 45% 3.5.3 Compression/Deflection, max 140 kPa (ASTM D 1056, 25% deflection at 2.5 mm/minute) 3.5.4 Compressi
9、on Set, max 35% (ASTM D 395, compressed 50% for 22 h at 100 C) 3.5.5 Accelerated Aging Bend 180, no cracks, surface (ASTM D 573, 72 h at tackiness or charring 230 +/- 2 C) 3.5.6 Low Temperature Test, 10% max thickness change (ASTM D 1056) 3.5.7 Flammability (ISO 3795/SAE J369) Burn Rate 100 mm/minut
10、e 3.5.8 Volatile Silicones, max 0.65% (FLTM AV 102-01) 3.6 REQUIREMENTS FOR SPONGE/FIBERGLASS COMPOSITE MATERIAL 3.6.1 Sponge cast between (2) layers of silicone rubber coated fiberglass: 3.6.1.1 Weight, max 3.20 kg/m2* max thickness 4.8 mm Weight shall be determined by cutting a 150 x 150 +/- 0.8 m
11、m specimen and weighing it to +/- 0.25 grams. Thickness shall be determined with a dial micrometer having minimum pressure foot diameter of 25 mm or similar averaging procedure. Weight shall be calculated as follows: Weight kg/m2= weight (in grams) x (0.0444) 3.6.1.2 Compression Deflection, max 137.
12、8 kPa (25% deflection at 2.5 mm/minute) 3.6.1.3 Compression Set, max 35% (ASTM D 395, compressed 50% for 22 h at 100 C) ENGINEERING MATERIAL SPECIFICATIONWSL-M99G163-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 3 3.6.1.4 Flammability (ISO 3795/SAE J369)
13、Burn Rate, max 100 mm/minute 3.7 REQUIREMENTS FOR FIBERGLASS MAT 3.7.1 Breaking Strength (ASTM D 5034, Grab and Modified Grab) Warp Direction, min 45 N/mm (25 mm clamp, 25 mm wide strip) Fill Direction, min 25 N/mm 3.7.2 Density, max 256 kg/m33.7.3 Flammability (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute
