1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 04 2015 09 11 N Status Replaced by WSS-M99P48-A2 D. Murtonen, NA 2011 05 24 Activated Re-activate for Seating S. Stanciu, NA 1998 08 05 Activated D. Whyte B. Chen Copyright 2015, Ford Global Technologies, LLC Page 1 of 3 POLYURETHANE (PUR
2、) FOAM, HIGH DENSITY, WSS-M2D491-A1 REDUCED KNUCKLING NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined in this specification is a slab stock flexible polyether polyurethane foam. 2. APPLICATION This specification was released originally for material used in fabric flame laminates and for
3、cut and sew applications where reduced knuckling is required. 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 ho
4、mogeneous 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 6 - 10 mm from the surface skin, unless otherwise specified. The specimen
5、s shall be free of voids, hard spots and densification lines. 3.5.1 Density, Core 48 +/- 5 kg/m3 (ISO 845/ASTM D 3574, Test A) 3.5.2 Tensile Strength, min 240 kPa (ISO 1798/ASTM D 3574, Test E, 50 mm bench marks, 5 specimens minimum) 3.5.3 Tear Strength, min 370 N/m (ISO 8067/ASTM D 3574, Test F, 50
6、 mm/minute test speed) 3.5.4 Compression Set, max 12% (ISO 1856, Method A/ASTM D 3574, Test D, Ct calculation, 22 h at 70 C, 50% deflection, 3 specimens minimum) ENGINEERING MATERIAL SPECIFICATION WSS-M2D491-A1 Copyright 2015, Ford Global Technologies, LLC Page 2 of 3 3.5.5 Compression Deflection St
7、ress (ISO 3386/1, 25% and 65% compression, 100 x 100 x 50 mm specimen, 100 +/- 20 mm/minute test speed, 3 specimens minimum) At 25% Compression 8 - 11 kPa At 65% Compression 14 - 26 kPa 3.5.6 Heat Aging (ISO 2440/ASTM D 3574, Test K, 22 h at 140 +/- 2 C) 3.5.6.1 Compression Deflection +/- 15% Stress
8、 Change, max (Test acc. to para 3.5.5 3 specimens minimum) 3.5.7 Humidity Aging (AUTOCLAVE) (ISO 2440/ASTM D 3574, Test J, 100 x 100 x 50 mm specimen, 5 h at 120 C) 3.5.7.1 Compression Deflection +/- 40% Stress Change, max (Test acc. to para 3.5.5) 3.5.7.2 Compression Set, max 25% (Test acc. to para
9、 3.5.4 absolute figures, Autoclave age uncompressed specimens first) 3.5.8 Cell Count, Cells/100 mm 150 - 250 Test Method: Cut a slice of foam as thin as possible and place it on an overhead projector together with a scale. Count the number of cells per linear unit over a distance of 100 mm. 3.5.9 S
10、taining None (FLTM BO 115-01) Cut out a sample of foam approx. 100 x 100 x 10 mm. Cover the larger side with white vinyl Accessory Test Material according to FLTM BN 103-01 with the glossy side uppermost and staple in place. Expose for 168 hours with the vinyl surface facing the light at a distance
11、of 300 mm. ENGINEERING MATERIAL SPECIFICATION WSS-M2D491-A1 Copyright 2015, Ford Global Technologies, LLC Page 3 of 3 3.5.10 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 rejecti
12、on. 3.5.11 Odor, max Rating 3 (FLTM BO 131-03) 3.5.12 Ash Content, max 1% (ISO 247, Method B/ASTM D 1278, 800 +/- 25 C) 3.5.13 Flammability (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute 3.5.14 Moisture Uptake, min 5% Cut out a sample of foam approximately 100 x 100 x 10 mm. Expose the sample for 24 h at 38 +/- 2 C and 95 - 100% relative humidity. Determine the increase in weight of the test piece. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE PUR
