1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 09 30 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.4, 3.8, 3.9 & 4 1999 09 24 Revised Revised para 3.5.5 L. Soreide 1990 10 16 Released NB00110043054042 C. C. Lang Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC
2、 Page 1 of 7 THERMOPLASTIC ELASTOMER (TEEE) WSB-M2D452-A MOLDING COMPOUND, INTERIOR WSB-M2D452-A2 WSB-M2D452-A3 1. SCOPE The materials defined by these specifications are flexible thermoplastic elastomeric (TEEE) injection and/or extrusion molding compounds. 2. APPLICATION These specifications were
3、released originally for a material used for air bag cover applications, which must be painted. 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). 3.3 DY
4、NAMIC MECHANICAL ANALYSIS (ASTM D 4065) Ford Motor Company, at its option, may establish a shear modulus/damping vs. temperature curves plotted for -50 to +170 C temperature range for material/parts supplied to this specification. The shear modulus and damping curves established for initial approval
5、 shall constitute the reference standard and shall be kept on file at the designated material laboratory. All samples shall produce shear modulus and damping curves that correspond to the reference standard when tested under the same conditions. 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Spe
6、cimens Unless otherwise specified, all tests shall be conducted on specimens die cut from injection molded plaques 150 x 100 x 2.0 +/- 0.2 mm. The plaques shall be molded according to ISO 294 and film gated along the upper 100 mm edge. No annealing allowed, unless specified otherwise. A A2 A3 3.5.2
7、Density, g/cm31.14 - 1.15 - 1.15 - (ISO 1183, Method A/ASTM D 792, 1.16 1.22 1.22 Method A1) 3.5.3 Hardness, Durometer D 41-52 49-64 48-63 (ISO 868/ASTM D 2240, 6 mm thick plied-up specimen, instantaneous reading) ENGINEERING MATERIAL SPECIFICATIONWSB-M2D452-A/A2/A3Printed copies are uncontrolled Co
8、pyright 2004, Ford Global Technologies, LLC Page 2 of 7 A A2 A3 3.5.4 Tensile Strength at Break, MPa, min 16 23 23 (ISO R 527, type 2/ASTM D 412, Die C, 115 x 6 x 2.0 +/- 0.2 mm specimen, 500 mm/min test speed) 3.5.4.1 Elongation at Break, %, min 450 480 450 (Test acc. to para 3.5.4) 3.5.5 Flexural
9、Modulus, MPa, min 83 390 500 (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) 3.5.6 Shear Modulus at 23 C, MPa 40 140 130 (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm
10、 cut from the center of specimen A. Specimen length between clamps 35 - 40 mm. Soak time at each temperature interval - 3 minutes minimum) Additionally, a Shear Modulus versus Temperature curve shall be plotted for -50 to +_ C temperature range, at 5 C minimum intervals. The plotted curve must be wi
11、thin tolerance range shown on page 6 (-A), page 7 (-A2), and page 8 (-A3). 3.5.7 Tear Strength, kN/m, min (ISO 34, Method B, procedure a/ ASTM D 624, Die C) 3.5.7.1 Parallel to Flow 108 97 86 3.5.7.2 Perpendicular to Flow 109 100 88 3.5.8 Compression Set, %, max (ISO 815, Large Type-plied specimen/A
12、STM D 395, Method B, Type 1-plied specimen) 3.5.8.1 22 h at 70 +/- 2 C 51 66 66 3.5.8.2 70 h at 100 +/- 2 C 72 83 83 3.5.9 Brittleness Point, C, max -74 -70 -70 (ISO 812, Type B specimen/ ASTM D 2137, Method A) ENGINEERING MATERIAL SPECIFICATIONWSB-M2D452-A/A2/A3Printed copies are uncontrolled Copyr
13、ight 2004, Ford Global Technologies, LLC Page 3 of 7 A A2 A3 3.5.10 Heat Aging (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 110 +/- 2 C) 3.5.10.1 Hardness Change, max +2 +3 +2 3.5.10.2 Tensile Strength Change, %, max -25 -10 -10 3.5.10.3 Elongation Change, %, max -10 -10 -10 3.5.10.4 Bri
14、ttleness or Bend Test No cracks No cracks 3.6 FOGGING (FLTM BO 116-03) Fog Number, min 90 90 90 Formation of a clear film, droplets or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO 3795) Burn Rate, max WSB-M2D452-A 100 mm/minute WSB-M2D452-A2/A3 DNB The specimen size required for material a
15、pproval is 355 x 100 x 1.6 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (ASTM D 696) 5.1.1 Temperature Range of -50 to +
16、50 C Parallel to flow, m/m 21-5/ C 21-5/ C 21-5/ C Across flow, m/m 12-5/ C 12-5/ C 12-5/ C 5.1.2 Temperature Range of 50 to 120 C Parallel to flow, m/m 23-5/ C 23-5/ C 23-5/ C Across flow, m/m 13-5/ C 13-5/ C 13-5/ C ENGINEERING MATERIAL SPECIFICATIONWSB-M2D452-A/A2/A3Printed copies are uncontrolle
17、d Copyright 2004, Ford Global Technologies, LLC Page 4 of 7 A A2 A3 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 2.0 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage, % . After 48 h at 23 +/- 2 C 1.8 1.5 1.5 5.2.2 Post Shrinkage, % (Separate specimens required for each test) . Afte
18、r 48 h at 80 C 0.20 0.41 0.32 . After 30 min at 120 C 0.30 0.51 0.45 5.2.3 Impact resistance (ASTM D 3763) The sample shall be tested with a 76 mm support diameter, 12.7 mm hemispherical diameter probe and the initial impact velocity of 6.7 m/s. 5.2.3.1 Room Temperature (4 h minimum at 23 +/- 2 C) A
19、s received 21.6 25.8 25.6 After 488.8 kj/m2 21.6 25.8 26.4 5.2.3.2 Cold Temperature (4 h minimum at -30 C) As received 28.5 32.9 32.1 After 488.8 kj/m2 38.9 36.7 36.6 5.3 OZONE RESISTANCE, max Rating 0 Rating 0 Rating 0 (FLTM BP 101-01, Procedure A, tensile specimen at 50% elongation) 5.4 RECYCLING
20、CODE TEEE ENGINEERING MATERIAL SPECIFICATIONWSB-M2D452-A/A2/A3Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 5 of 7 ENGINEERING MATERIAL SPECIFICATIONWSB-M2D452-A/A2/A3Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 6 of 7 ENGINEERING MATERIAL SPECIFICATIONWSB-M2D452-A/A2/A3Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 7 of 7
