1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 08 N-STATUS No replacement named J. Crist, NA 2005 11 11 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.6, 3.7 & 4 1989 09 29 Released SM/EQ035825 TP K. Gerhards Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC
2、Page 1 of 2 ETHYLENE VINYL ACETATE (EVAC) FOAM WSK-M4D675-A CROSSLINKED, CLOSED CELL, 30 kg/mNOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a closed cell, crosslinked ethylene vinyl acetate foam with a nominal density of 30 kg/m. 2. APPLICATION This specificatio
3、n was released originally for material used as seal door latch. 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 foam shall have a
4、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 specimens taken from the foamed material with surface skin removed. 3.5.1 Density 30 + 10/- 5 kg/m(ISO 845/ASTM
5、 D 3574, Test A) 3.5.2 Tensile Strength, min 140 kPa (ISO 1798/ASTM D 3574, Test E, 50 mm bench marks, 5 specimens minimum) 3.5.2.1 Elongation at Break, min 200% (Test acc. to 3.5.2) 3.5.3 Compression Set, max 42% (ISO 1856, Method A/ASTM D 3574, Test D, ct calculation, 22 h at 23 C, 50% deflection,
6、 3 specimens, minimum) 3.5.4 Compression Deflection Stress 55 +/- 15 kPa (ISO 3386/1 at 40% compression, specimen size 100 x 100 x 50 mm, test speed 100 +/- 20 mm/min) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D675-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2
7、of 2 3.5.5 Water Absorption, max 2% (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 80 +/- 2 C for 3 h. Dimensional changes shall
8、be measured 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, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h) Fog Number, min 60 Formation of clear film, droplets or crystals is cause for rejection. 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 11 +/- 0.1 mm with smooth surfaces.
