1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 02 20 Activated M. Masserant Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 3 POLYURETHANE FOAM, 25% MINIMUM RECYCLED CONTENT WSS-M2D477-A2 HARDNESS 40 DUROMETER “00“ 1. SCOPE The material that is
2、defined by this specification is a polyurethane foam, modified with 25% minimum recycled rubber from used tires. 2. APPLICATION This specification was released originally for materials used in underbody, underhood, interior, and other applications, such as body plugs, grommets, bumpers, as a suitabl
3、e replacement for virgin rubber, and polyurethane foam parts. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 MATERIAL TESTING 3.2.1 Preparation of Test Specimen
4、s Whenever possible, all test specimens shall be die-cut from the finished parts. When not feasible, specimens cut from molded test sheets manufactured from the same material and with equivalent cure to molded parts are recommended. The test sheets shall have the following dimensions: 350 x 100 mm,
5、min x 6.4 +/- 0.2 mm or 150 x 150 mm, min x 25.4 +/- 0.2 mm or 150 x 150 mm, min x 12.7 +/- 0.2 mm 3.3 ORIGINAL PROPERTIES 3.3.1 Density, g/cm3at 23 C 0.24 +/- 0.03 (ISO 1183, Method A) 3.3.2 Hardness, Durometer Shore “00“ 40 +/- 5 (ISO 868, instantaneous reading) (s) 3.3.3 Tensile Strength, kPa, mi
6、n 400 kPa (ISO 37) 3.3.4 Elongation at Break, % min 150% (Test Method according to para 3.3.3) 3.3.5 Modulus at 100% Elongation, kPa, min 300 kPa (Test Method according to para 3.3.3) ENGINEERING MATERIAL SPECIFICATIONWSS-M2D477-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technolog
7、ies, LLC Page 2 of 3 (s) 3.3.6 Tear Strength, N/m, min 700 N/m (ISO 34, Method B, Procedure A) 3.3.7 Cold Flexibility No cracking (FLTM BN 102-01, 24 h at 40 C) 3.3.8 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A) No visible checking or cracking at 2X magnification 3.3.9 Compression Se
8、t, %, max. 10% (ASTM D 3574, 50% compression, 70 h at 70 +/- 2 C) 3.3.10 Odor, max Wet - Rating 3 (SAE J1351) Dry Rating 3 3.4 HEAT AGED (ISO 188, 168 h at 110 +/- 2 C) 3.4.1 Hardness Change + 3 3.4.2 Tensile Strength Change, max +/- 25% 3.4.3 Elongation Change, max +/- 25% 3.4.4 Visual Evaluation N
9、o surface tackiness or cracks when folded flat against itself 3.5 HEAT AGED (ISO 188, 1000 h at 80 +/- 2 C) 3.5.1 Hardness Change + 3 3.5.2 Tensile Strength Change, max +/- 25% 3.5.3 Elongation Change, max +/- 25% 3.5.4 Visual Change No surface tackiness or cracks when folded flat against itself 3.6
10、 HEAT AND HUMIDITY AGING (168 h at 85 C and 85% Relative Humidity) 3.6.1 Length change, max + 2% 3.6.2 Width change, max + 2% 3.6.3 Thickness change, max + 2% ENGINEERING MATERIAL SPECIFICATIONWSS-M2D477-A2Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 3 of 3 3.7
11、FLAMMABILITY, max (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.0 +/- 0.1 mm (use specimen C) with a smooth surface. 3.8 FOGGING, min (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 70 Formation of clear film, droplets or crystals is cause for rejection.
