1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 25 N-STATUS No replacement named J. Crist, NA 2006 05 17 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9 & 4 1992 10 10 Released NB00I10043054206 D.M. Keller Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LL
2、C Page 1 of 5 THERMOPLASTIC POLYURETHANE ELASTOMER (TPUR), WSB-M4D853-A IMPACT MODIFIED, 20% MINERAL FILLED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an impact modified thermoplastic polyurethane molding compound that is capable of being pa
3、inted and baked at 120 C for exterior use, if properly supported. The modifying impact compound is a styrenic based copolymer. 2. APPLICATION This specification was released originally for material used for painted bodyside moldings. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS
4、 Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Mineral Content 17 - 23% (ISO 3451/1, Method A, 1 g of pellets at 550 +/- 25 C) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens
5、 Unless otherwise specified all tests shall be carried out 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 por
6、tion of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.27 - 1.33 g/cm (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Hardness, Durometer D 50 - 60 (ISO 868/ASTM D 2240, 15 s dwell) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D8
7、53-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 3.5.4 Tensile Strength at Max Load, min 16 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 3.5.5 Flexural Modulus, min 250 MPa (ISO 178/ASTM D 790M, Method I, Proced
8、ure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span, the radius of the loading nose 5.0 +/- 0.1 mm and of the supports 2.0 +/- 0.2 mm) 3.5.6 Shear Modulus at 23 C 140 - 210 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below
9、1%. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm 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 vs. Temperature curve shall be plotted for -50 to +100 C temperature range, at 5 C minim
10、um intervals. The plotted curve must be within tolerance range shown on page 5. 3.5.7 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.7.1 At 23 +/- 2 C 23 kJ/m 3.5.7.2 At -40 +/- 2 C 3 kJ/m 3.5.7.3 At 0 +/- 2 C 7
11、kJ/mThe test 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. 3.5.8 Heat Deflection Temperature, min (ISO 75/ASTM D 648,
12、 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm) 3.5.8.1 At 1.80 MPa 35 C 3.5.8.2 At 0.45 MPa 40 C All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. ENGINEERING
13、MATERIAL SPECIFICATIONWSB-M4D853-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.5.9 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C. Unaged property values shall be determined at the time of the aged properties
14、determination) 3.5.9.1 Tensile Strength Change +/- 25% (Test Method per para 3.5.4) 3.5.9.2 Impact Strength, Izod Change +/- 25% (Test Method per para 3.5.7.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material
15、approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 70 Formation of excessive amounts of clear film or droplets is cause for rejection. 3.8 ADDITIONAL REQUIREMENTS Specific requirements for material and/or manufactured parts shall be specified o
16、n the Engineering drawing, Engineering parts specification and/or performance specifications. All critical areas with respect to these properties shall be clearly designated on the Engineering drawing. 3.8.1 Regrind 20% maximum of regrind produced from molded and/or painted parts is acceptable, prov
17、iding all requirements of this specification are met. 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 7.2-5/ C (ASTM D 696) ENGINEERING MATERIAL SPECIFICATIO
18、NWSB-M4D853-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 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 0.6 - 1.0% 5.2.2 Post Shrinkage (Separate specimens re
19、quired for each test) . After 48 h at 80 C 0.7 - 0.9% . After 30 min at 120 C 1.0 - 1.3% 5.3 ELONGATION AT BREAK 160% (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 5.4 RECYCLING CODE SAE or TPUR-MD20 TPUR-MD20 OPTIONAL ENGINEERING MATERIAL SPECIFICATIONWSB-M4D853-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
