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-A2 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 40 kg/m. 2. APPLICATION This specificatio
3、n was released originally for material used as watershields. 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 hom
4、ogeneous 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 36 - 44 kg/m (ISO 845) 3.5.2 Tensile Strength, min 3
5、00 kPa (ISO 1798, 50 mm bench marks, 5 specimen minimum) 3.5.2.1 Elongation at Break, min 90% (Test acc. to 3.5.2) 3.5.3 Compression Set, max 45% (ISO 1856, Method A, ct calculation, 22 h at 23 C, 50% deflection, 3 specimens, minimum) ENGINEERING MATERIAL SPECIFICATION WSS-M4D649-A2 Printed copies a
6、re uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 2 3.5.4 Compression Deflection Stress 80 +/- 15 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 5% (ASTM D 1056, subject specimen to a vacuum of 84 k
7、Pa) 3.5.6 Dimensional Stability, max WMD 5% AMD 5% 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 temperature. 3.5.7 Cold Flexibility at -40 C No
8、cracks (FLTM BN 102-01, diameter of mandrel shall be 2.5 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 rejection. 3.5.9 Odor, max Rating 2 (FL
9、TM 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 4.0 +/- 0.1 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
