1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Ver 3 2008 06 20 N-STATUS Replaced by WSS-M99P32-B G. Kowalski, FNA 2005 10 18 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7 & 4 1996 01 19 Activated K. Gerhards Printed copies are uncontrolled Copyright 2008, Ford Global Technologies
2、 LLC Page 1 of 2 POLYETHYLENE (PE) FOAM, CHEMICALLY WSS-M4D649-A3 CROSSLINKED, CLOSED CELL 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 60 kg/m. 2. APPLICATION This specificatio
3、n was released originally for material used as insulation front fender. 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
4、 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 skins on both sides. 3.5.1 Density 54 - 66 kg/m (ISO 845) 3.5.2 Tensile Stre
5、ngth, min (ISO 1798, 50 mm bench marks, 5 specimen minimum) WMD 420 kPa AMD 350 kPa 3.5.2.1 Elongation at Break, min (Test acc. to 3.5.2) WMD 90% AMD 100% ENGINEERING MATERIAL SPECIFICATION WSS-M4D649-A3 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 2 3.5.3
6、Compression Set, max 35% (ISO 1856, Method A, ct calculation, 22 h at 23 C, 50% deflection, 3 specimens, minimum) 3.5.4 Compression Deflection Stress 130 +/- 20 kPa (ISO 3386/1 at 40% compression, specimen size 100 x 100 x 50 mm, test speed 100 +/- 20 mm/min) 3.5.5 Water Absorption, max 7% (ASTM D 1
7、056, 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 measured after cooling down to room tempera
8、ture. 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 70% Formation of clear film, droplets or crystals is cause for
9、rejection. 3.5.9 Odor, max Rating 2 (FLTM BO 131-01) 3.5.10 Flammability (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 8.0 +/- 0.8 mm with smooth surfaces. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PE
