1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 27 N-STATUS Replaced by WSS-M15P45-B C. Mracna, Na 2004 09 21 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.6, 3.7 & 4 deleted 1989 08 31 Released SM/EQ7118 TP K. H. Gerhards Printed copies are uncontrolled Copyright 2009, Ford Glob
2、al Technologies, LLC Page 1 of 2 POLYURETHANE (PUR) FOAM, MOLDED, WSK-M2D408-A HIGH DENSITY NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a high density molded, flexible polyurethane foam. 2. APPLICATION This specification was released originally for material u
3、sed for in-situ foamed armrests integrated in door and quarter trim panels. 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 s
4、hall 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 shall be determined on specimens taken from the core with surface skin cut off, unless otherwise specified. In c
5、ase some specimens cannot be prepared from the molded part, substitute test slabs of convenient size shall be used. This specimen shall be free of voids, hard spots and densification lines. 3.5.1 Density, Core, min 200 kg/m3(ISO 845/ASTM D 3574, Test A, 3.5.2 Tensile Strength, min 100 kPa (ISO 1798/
6、ASTM D 3574, Test E, 50 mm bench marks, 5 specimens minimum.) 3.5.2.1 Elongation at Break, min 20% (Test according to para 3.5.2) 3.5.3 Compression Set, max (ISO 1856, Method A/ASTM D 3574, Test D, Ct calculation, 22 h at 70 C, 3 specimens minimum.) 3.5.3.1 At 50% Deflection 6% 3.5.3.2 At 75% Deflec
7、tion 8% ENGINEERING MATERIAL SPECIFICATIONWSK-M2D408-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.5.4 Compression Deflection Stress 120 +/- 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 Heat
8、 Aging (ISO 2440/ASTM D 3574, Test K, 22 h at 140 +/- 2 C) 3.5.5.1 Compression Deflection Stress Change, max 30% (Test acc. to para 3.5.4) 3.5.6 Humidity Aging (AUTOCLAVE) (ISO 2440/ASTM 3574, Test J, 100 x 100 x 50 mm specimen, 5 h at 120 C) 3.5.6.1 Compression Deflection Stress Change, max 30% (Te
9、st acc. to para 3.5.4) 3.5.6.2 Compression Set, max 10% (Test acc. to para 3.5.3.1) 3.5.7 Staining None Test Method: Cover an approx. 100 mm x 100 mm x 10 mm foam specimen (with surface skin on one side) with a section of light colored standard vinyl (FLTM BN 103-01). Expose assemblies (surface skin
10、 of foam facing light source) for 150 h in the Fluorescent Sunlamp Cabinet (equipment as specified in FLTM BO 115-01). Control specimens of vinyl should also be exposed. Evaluate the standard material after cooling to room temperature. 3.5.8 Fogging, min (FLTM BO 116-03) Fog Number, min 70 Formation of excessive amounts of clear film or droplets 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 5.0 +/- 0.1 mm with smooth surfaces.
