1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Ver 4 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 1991 07 01 Released EP00E01089486000 K. Gerhards Printed copies are uncontrolled Copyright 2008, Ford Glo
2、bal Technologies, LLC Page 1 of 2 POLYETHYLENE (PE) FOAM, CROSSLINKED, CLOSED WSK-M4D820-A CELL, 48 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 48 kg/m3. 2. APPLICATION This specific
3、ation was released originally for material used as loud speaker panel support. 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 foa
4、m 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 (ISO 845/ASTM D 3574, Test A) 10 mm slab
5、thickness 48 + 27/- 18 kg/m3 25 mm slab thickness 48 + 16/- 16 kg/m3 3.5.2 Tensile Strength, min 220 kPa (ISO 1798/ASTM D 3574, Test E, 50 mm bench marks, 5 specimens minimum) 3.5.2.1 Elongation at Break, min 70% (Test according to 3.5.2) 3.5.3 Compression Set, max 27% (ISO 1856, Method A/ASTM D 357
6、4, Test D, ct calculation, 22 h at 23 C, 50% deflection, 3 specimens, minimum) ENGINEERING MATERIAL SPECIFICATION WSK-M4D820-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 2 3.5.4 Compression Deflection Stress 170 +/- 50 kPa (ISO 3386-1 at 40% compression,
7、specimen size 100 x 100 x 50 mm, test speed 100 +/- 20 mm/minute) 3.5.5 Water Absorption, max 5% (ASTM D 1056, subject specimen to a vacuum of 84 kPa) 3.5.6 Dimensional Stability, max WMD -6% AMD -6% Test Method: A specimen approximately 300 x 300 mm in size shall be placed in a mechanical convectio
8、n 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 cracks (FLTM BN 102-01, diameter of mandrel shall be 2 times of specimen thickness) 3.5.8 Fogging (FLTM BO 116-03) Fog Number, min 80 The formati
9、on of droplets or coalescence into a clear film 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 10 +/- 0.1 mm with a surface skin removed. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE SAE or PE PE OPTIONAL
