1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 09 21 N-STATUS Replaced by WSS-M99P32-C C. Mracna, NA 2004 09 30 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 1990 11 21 Released NB00I10043054046 D.R.Henrickson J.B.McCallum Printed copies are uncontrolled Copyright 2009, Fo
2、rd Global Technologies, LLC Page 1 of 4 POLYURETHANE (PUR) FOAM, CAST WSB-M2D456-A NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a cast polyurethane foam, formulated to be free of chlorofluorocarbons (CFC). 2. APPLICATION This specification was released origina
3、lly for material used as instrument panel insulators and floor carpet underlayment. The foam shall not be used in direct contact with metal temperatures exceeding 120 C. Metal contact temperatures or exposure temperatures that exceed 120 C shall employ sufficient insulation to insure that the foam i
4、s exposed to less than 120 C. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENT 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 homogeneous medium sized cell struc
5、ture 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 of a 50 mm thick surrogate block at least 2 - 5 mm from the surface skin, unless otherwise specified. This
6、 specimen shall be free of voids, hard spots and densification lines. 3.5.1 Aged Weight Loss, max 1.5% Test Method: Weigh 100 x 100 x 25 mm sample to nearest mg (W1). Place the sample in a convection oven maintained at 120 +/- 2 C for 24 h. Remove the sample and reweigh to the nearest mg (W2). (W1-
7、W2) x 100 % Weight Loss = - W13.5.2 Heat Aging (ISO 2240/ASTM D 3574, Test K, 48 h at 120 +/- 2 C) ENGINEERING MATERIAL SPECIFICATIONWSB-M2D456-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 4 3.5.2.1 Tensile Strength Change, max 15% (ISO 1798/ASTM D 3574, T
8、est E, 50 mm bench marks, 5 specimens minimum) 3.5.3 Humidity Aging (AUTOCLAVE) (ISO 2440/ASTM D 3574, Test J, sample per Test E, 10 h at 120 +/- 2 C, two 5 h cycles) 3.5.3.1 Tensile Strength Change, max 30% (ISO 1798/ASTM D 3574, Test E, 50 mm bench marks, 5 specimens minimum) 3.5.4 Odor, max Ratin
9、g 2 (FLTM BO 131-01/SAE J1351) 3.5.5 Ash Content, max 4% (ISO 247, Method B/ASTM D 1278, 800 +/- 25 C) 3.5.6 Flammability (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute 3.5.7 Durability (NAAO Only) (ASTM D 3574, Test I2, except use 27 kg and no load deflection readings, required for initial approv
10、al only) 3.5.7.1 Original 3,000 cycles 3.5.7.1 Aged 100 h at 120 +/- 2 C 1,000 cycles There shall be no evidence of excessive crumbling or deterioration, e.g., physical separation resulting in dislodged sections or internal cohesive separation. 3.5.8 Sound Absorption, min (ASTM C 384, skin towards s
11、ource, 25 mm thick sample, at the specified density, initial approval only) Frequency (Hz) Absorption Coefficient 250 7 500 20 1000 50 2000 60 ENGINEERING MATERIAL SPECIFICATIONWSB-M2D456-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 4 3.6 LINE CALLOUT REQU
12、IREMENTS Shall be specified on engineering drawing and Corporate Approved Source List The following properties shall be determined on actual specimens, if possible. Create a seven digit designation for the grade of material using the classification system below. 3.6.1 Density, min First Digit (ISO 8
13、45/ASTM D 3574, kg/m3Code Letter Test A) (+/- 10%) 32 1 48 2 64 3 80 4 Special Reqts. 9 3.6.2 Tensile Strength, min Second Digit (ISO 1798/ASTM D 3574, KPa Code Letter Test E, 50 mm bench marks, (ISO 1798/ASTM D 3574, 50 1 5 specimens min) 100 2 150 3 200 4 Special Reqts. 9 3.6.3 Elongation at Break
14、 min Third Digit (Test according to 3.6.2) % Code Letter 60 1 75 2 90 3 105 4 Special Reqts. 9 3.6.4 Tear Strength, min Fourth Digit (ASTM D 624, DIE “C“, N/mm Code Letter 12.7 mm thick) 0.2 1 0.4 2 0.6 3 0.8 4 1.0 5 Special Reqts. 9 3.6.5 Fogging, min Fifth Digit (FLTM BO 116-03, Number Code Lette
15、r 3 h at 100 C) 60 1 70 2 80 3 90 4 Special Reqts. 9 Formation of a clear film, droplets or crystals is cause for rejection. ENGINEERING MATERIAL SPECIFICATIONWSB-M2D456-APrinted copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 4 3.6.6 Compression Set, max Sixth Digit
16、ISO 1856, Method A/ % Code Letter ASTM D 3574, Test D, 22h at 70 C, 50% deflection 15 1 Ct calculation, 30 2 3 specimens, min) 45 3 60 4 Special Reqts. 9 3.6.7 Compression Deflection Seventh Digit Stress kPa Code Letter (ISO 3386/1 at 40% (+/- 15%) compression, 50 x 50 x 25 mm specimen size, 3.0 1 100 +/- 20 mm/min test 6.0 2 speed, 3 specimens min) 9.0 3 12.0 4 Special Reqts. 9
