1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 12 N-STATUS No Replacement Named A. Pan, AP 2006 01 11 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 2002 03 28 Activated M.A. Myers Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 1 of 4
2、THERMOPLASTIC POLYURETHANE ELASTOMER (TPU) WSS-M4D738-A3 20% MINERAL FILLED MOLDING COMPOUND, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a mineral filled thermoplastic polyurethane (TPU) injection molding compound. 2. APPLICATION This specification
3、was released originally for material used for painted liftgate moldings. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys St
4、andard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Filler Content 18 24% (ISO 3451-1, Method A, mineral filler, 1 g of pellets, at 350 +/- 10 C) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried o
5、ut on injection molded one-end gated test specimens. The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2 mm Specimens with shorter dimensions shall be cut from the center portion of the test specimen A and/or B. The specimens shal
6、l be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.30 - 1.35 g/cm3(ISO 1183, Method A) 3.5.3 Tensile Strength at Max Load, min 35 MPa (ISO 527-1 and ISO 527-2, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/ minute test speed ENGINEERING MATERIAL SPECIFICATIONWSS-M4D738-A3 Print
7、ed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 4 3.5.4 Flexural Modulus, min 2.3 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, 2 mm/minute test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 460 770 MPa (ASTM D 4065, for
8、ced constant amplitude, fixed frequency of 1 HZ +/- 15%, strain level below 1%. Specimens approximately 60 x 10 x 4.0 +/0.2mm cut from the center of specimen A. Specimen length between clamps 35 - 40 mm. Soak time at each temperature interval - 3 minutes min) Additionally, a shear modulus versus tem
9、perature curve shall be plotted for -50 to +140 C temperature range, at 5 C min intervals. The plotted curve must be within tolerance range granted on the original material approval and it shall constitute the reference standard for materials supplied to this specification and shall be kept on file
10、at designated material laboratory and be available on request. 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/-0.2 mm specimen use center section of specimen A, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 13 kj/m23.5.6.2 At -40 +/- 2 C 3 kj/m23.5.6.3 At 0 +/- 2 C 8 kj/m2The test
11、 specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min 55 C (ISO 75-1 and ISO 75-2, 80
12、 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, flatwise, deflection of 0.32 +/- 0.01 mm. At 1.80 MPa) 3.5.8 Heat Aging Performance (ISO 188, 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination)
13、 3.5.8.1 Tensile Strength at Yield Change +/- 25% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, IZOD Change +/- 25% (Test Method per para 3.5.6.1 specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D738-A3 Printed copies are uncontrolled Copyright 2009, Ford Gl
14、obal Technologies, LLC Page 3 of 4 3.6 FLAMMABILITY (ISO 3795) mm/minute Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 3.0 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance
15、in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 6.0-5/C (ASTM E 831), from -30 C to +40 C 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.26% 5.2.2 Post Shr
16、inkage (Separate specimens required for each test) . After 48 h at 80 C 0.3% . After 30 min at 120 C 0.4% 5.3 HEAT DEFLECTION TEMPERATURE, min 95 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, flatwise at standard deflection of 0.32 +/- 0.1 mm. At 0.45 MPa) 5.4 RECYCLING CODE TPU-M20 5.5
17、VICAT SOFTENING TEMPERATURE, min 85 C (ISO 306, 10 x 10 4.0 +/- 0.2 mm specimens use center section of specimen A Bath -silicone oil, temperature raise 50 +/- 5 C/h. Dial gage rest to 0 after addition of 5 kg weight. At 50 N load) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D738-A3 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 4
