1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Ver 3 2008 06 20 N-STATUS Replaced by WSS-M99P32-B G. Kowalski 2005 10 18 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7 & 4 1989 05 19 Released SM/EQ9548 TP K. H. Gerhards Printed copies are uncontrolled Copyright 2008, Ford Global Te
2、chnologies, LLC Page 1 of 2 POLYETHYLENE (PE) FOAM, CHEMICALLY CROSSLINKED, WSK-M4D649-A CLOSED CELL, 30 kg/m NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a closed cell, chemically crosslinked polyethylene foam with a nominal density of 30 kg/m. 2. APPLICATION
3、 This specification was released originally for material used as damper anti rattle. 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 T
4、he foam shall have a homogeneous medium sized cell structure with no large voids or solid spots which may impair the serviceability of the part. 3.5 TEST SPECIMEN The following material properties are based on foam material with surface skin removed. 3.5.1 Density 30 +10/-5 kg/m (ISO 845/ASTM D 3574
5、, Test A) 3.5.2 Tensile Strength, min 130 kPa (ISO 1798/ASTM D 3574, Test E, 50 mm bench marks, 5 specimen minimum) 3.5.2.1 Elongation at Break, min 70% (Test acc. to 3.5.2) 3.5.3 Compression Set, max 40% (ISO 1856, Method A/ASTM D 3574, Test D, ct calculation, 22 h at 23 C, 50% deflection, 3 specim
6、ens, minimum) ENGINEERING MATERIAL SPECIFICATION WSK-M4D649-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 2 3.5.4 Compression Deflection Stress 83 +/- 15 kPa (ISO 3386/1 at 40% compression, specimen size 100 x 100 x 50 mm, test speed 100 +/- 20 mm/min) 3.5
7、.5 Water Absorption, max 5% (ASTM D 1056, subject specimen to a vacuum of 84 kPa) 3.5.6 Dimensional Stability, max WMD -8% AMD -8% Test Method: A specimen approx. 300 x 300 mm in size shall be placed in a mechanical convection oven maintained at 100 +/- 2 C for 3 h. Dimensional changes shall be meas
8、ured after cooling down to room temperature. 3.5.7 Cold Flexibility at -40 C No cracks (FLTM BN 102-01, diameter of mandrel shall be 2 times of specimen thickness) 3.5.8 Fogging (FLTM BO 116-03) Fog Number, min 80 3.5.9 Odor, max Rating 2 (FLTM BO 131-01/SAE J 1351) 3.5.10 Flammability (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 3.0 +/- 0.1 mm with smooth surfaces.
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