1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Ver 3 2008 06 20 N-STATUS Replaced by WSS-M99P32-B G. Kowalski, FNA 2005 05 25 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7, 4 1990 05 02 Released EP00E01031535000 K. H. Gerhards Printed copies are uncontrolled Copyright 2008, Ford G
2、lobal Technologies, LLC Page 1 of 2 POLYETHYLENE (PE) FOAM, CROSSLINKED WSK-M4D764-A CLOSED CELL, 200 kg/m3 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a closed cell, crosslinked polyethylene foam with a nominal density of 200 kg/m3 2. APPLICATION This specif
3、ication was released originally for material used as instrument cluster gaskets. 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 The f
4、oam 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 200 +/- 40 kg/m3 (ISO 845/ASTM D 3574,
5、Test A) 3.5.2 Tensile Strength, min 1.0 MPa (ISO 1798/ASTM D 3574, Test E, 50 mm bench marks, 5 specimen minimum) 3.5.2.1 Elongation at Break, min 60% (Test acc. to 3.5.2) 3.5.3 Compression Set, max 25% (ISO 1856, Method A/ASTM D 3574, Test D, ct calculation, 22 h at 23 C, 50% deflection, 3 specimen
6、s, minimum) ENGINEERING MATERIAL SPECIFICATION WSK-M4D764-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 2 3.5.4 Compression Deflection Stress 540 +/- 100 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 3% (ASTM D 1056, subject specimen to a vacuum of 84 kPa) 3.5.6 Dimensional Stability, max WMD -5% AMD -3% 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 (SAE J1756, 3h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 80 Formation of clear film, droplets or crystals is cause for rejection. 3.5.9 Odor, max Rating 2 (FLTM BO 131-01/SAE J1351) 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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