1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2006 01 17 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 2000 02 15 Editorial no technical change APC 1990 08 01 Released EP00E01031538000 L. Rodigas Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Pag
2、e 1 of 5 THERMOPLASTIC POLYURETHANE ELASTOMER (TPU) WSK-M4D755-A1 55 DUROMETER D HARDNESS THERMOPLASTIC POLYURETHANE ELASTOMER (TPU) WSK-M4D755-A2 40 DUROMETER D HARDNESS 1. SCOPE The materials defined by these specifications are rigid thermoplastic polyurethane elastomer (TPU), 55 durometer D hardn
3、ess (-A1) and 40 durometer D hardness (-A2). 2. APPLICATION These specifications were released originally for materials used for the ball at the transmission gear shift lever fulcrum (-A1) and for a component of front door latch (-A2). 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIA
4、LS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end gated test specime
5、ns. 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 shall be prepared according to ISO 294. No annealing
6、allowed. A1 A2 3.4.2 Density, g/cm31.18 - 1.16 - (ISO 1183, Method A/ASTM D 792, 1.22 1.20 Method A1) 3.4.3 Hardness, Durometer D 50 - 60 35 - 45 (ISO 868/ASTM D 2240, 15 s dwell) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D755-A1/A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technolog
7、ies, LLC Page 2 of 5 A1 A2 3.4.4 Tensile Strength at Break, MPa, min 40 30 (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.4.4.1 Elongation at Break, %, min 350 450 (Test Method according to para 3.4.4)3.4.5 Flexural Modulus, MPa, min 100 30 (ISO 178/ASTM D 79
8、0M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.4.6 Shear Modulus at 23 C, MPa 60 - 90 15 - 25 (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 cut from the center of specime
9、n 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 +50 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page
10、s 4 (-A1) and 5 (-A2). 3.4.7 Impact Strength, Izod, kJ/m, min 2 (ISO 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.4.7.1 At 23 +/- 2 C No break No break 3.4.7.2 At -40 +/- 2 C 3.5 80 3.4.7.3 At 10 +/- 2 C No break No break 3.4.7.4 At -30 +/- 2
11、 C 3.7 No break The 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. 3.4.8 Heat Deflection Temperature, C. min 40 4
12、5 (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 0.45 MPa) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D755-A1/A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 5 3.4.9 Heat Aging Performance (A1 & A2) (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 10
13、00 h at 100 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Break, min 32 MPa (Test Method per para 3.5.4) 3.5.9.2 Impact Strength, Izod, min No break (Test Method per para 3.5.7.1, specimens to be notched before heat
14、aging) 3.5 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.6 FOGGING (A1 & A2) (FLTM BO 116-03) Fog Number, min 80 Formation of excessive amounts of clear film or droplets is cause for reject
15、ion. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of these specifications. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (A1 & A2) 10 - 20-5/C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm in
16、jection molded specimen) 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 0.5 - 0.9% 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 C 0.6 - 1.2% After 30 min at 120 C 0.8 - 1.3% ENGINEERING MATERIAL SPECIFICATIONWSK-M4D755-A1/A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D755-A1/A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5
