1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Ver 3 2008 06 20 N-STATUS Replaced by WSS-M99P32-B G. Kowalski, FNA 2006 03 31 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.6, 3.7 & 4 1994 11 02 Released EP00E10348615000 K. Gerhards Printed copies are uncontrolled Copyright 2008, Ford Glo
2、bal Technologies, LLC Page 1 of 2 POLYETHYLENE (PE) FOAM, PHYSICALLY WSK-M4D819-A2 CROSSLINKED, CLOSED CELL NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a closed cell, physically crosslinked polyethylene foam with a nominal density of 33 kg/m3. 2. APPLICATION
3、This specification was released originally for material used as water shields and wheel arch covers. 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).
4、3.4 APPEARANCE The 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 skins on both sides. 3.5.1 Density 33 + 3/- 4 k
5、g/m3 (ISO 845) 3.5.2 Tensile Strength, min 200 kPa (ISO 1798, 50 mm bench marks, 5 specimen minimum) 3.5.2.1 Elongation at Break, min 45% (Test acc. to 3.5.2) 3.5.3 Compression Set, max 48% (ISO 1856, Method A, ct calculation, 22 h at 23 C, 50% deflection, 3 specimens, minimum) ENGINEERING MATERIAL
6、SPECIFICATION WSK-M4D819-A2 Printed copies are 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 1% (ASTM
7、D 1056, subject specimen to a vacuum of 84 kPa) 3.5.6 Dimensional Stability, max WMD -5% AMD -4% 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 te
8、mperature. 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, 3 h at 100 C heating, 21 C cooling plate) Fog Number, min 80 Formation of a clear film, droplets or crystals is cause for rejection. 3.5.9
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 2.0 +/- 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 RECYCLING CODE PE
