1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2011 09 02 N Status A1 N Status Replaced by WSS-M4D840-B1 B. Haggart, FNA 2006 11 22 Revised Paragraph 3.6 Added 3.8.3 1992 10 01 Released EP00E10176308000 L. Rodigas Controlled document at www.MATS Copyright 2011, Ford Global Technolo
2、gies, LLC Page 1 of 8 ACETAL (POM) COPOLYMER, MELT FLOW RATE WSK-M4D840-A1 5 - 11, INTERIOR NOT TO BE USED FOR NEW DESIGN ACETAL (POM) COPOLYMER, MELT FLOW RATE WSK-M4D840-A2 11 - 16, INTERIOR ACETAL (POM) COPOLYMER, MELT FLOW RATE WSK-M4D840-A3 29 - 35, INTERIOR 1. SCOPE The material defined by the
3、se specifications is thermoplastic acetal copolymers based on trioxane for interior use with melt flow rates from 5 to 35 g/10 minutes. 2. APPLICATION These specifications were released originally for materials used for decorative and/or functional interior automotive applications such as loudspeake
4、r grilles, etc. 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 Standard Requirements For Production Materials (WSS-M99P111
5、1-A). 3.1.1 All requirements of this specification, identified by symbol(s), shall be met with data representing 3 sigma values. 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate, g/10 minutes (ISO 1133, 190 C, 2.16 kg) A1 A2 A3 5 11 11 16 29 - 35 Note: For individual melt flow rates of approved materials s
6、ee Corporate Approved Source List. ENGINEERING MATERIAL SPECIFICATION WSK-M4D840-A1/A3 Copyright 2011, Ford Global Technologies, LLC Page 2 of 8 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end gated te
7、st 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 shall be prepared according to ISO 294. No
8、annealing allowed. 3.5.2 Density 1.39 - 1.43 g/cm3 (ISO 1183, Method A) 3.5.3 Tensile Strength at Yield, min 60 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed) 3.5.4 Flexural Modulus, min 2.4 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed
9、, 64 mm support span) 3.5.5 Shear Modulus at 23 C, GPa (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 specimen A. Specimen length between clamps 35 - 40 mm. Soak time at each temperatur
10、e interval 3 minutes minimum). Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +150 C temperature range, at 5 C minimum intervals. The plotted curves must be within tolerance ranges shown on pages 6 (-A1), 7 (-A2), 8 (-A3). A1 A2 A3 0.76 - 1.4 0.80 - 1.47 0.80 - 1.47
11、ENGINEERING MATERIAL SPECIFICATION WSK-M4D840-A1/A3 Copyright 2011, Ford Global Technologies, LLC Page 3 of 8 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.1 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 3.0 kJ/m2 3.5.6.2 At -40 +/- 2 C 2.5 kJ/m2 The test specime
12、ns 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. 3.5.7 Heat Deflection Temperature, min (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection) 3.5.7.1 At 1.80 MPa
13、 90 C 3.5.7.2 At 0.45 MPa 140 C 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 90 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of the aged properties
14、 determination) 3.5.8 1 Tensile Strength at Break Change +/- 20% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change, max +/- 35% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FOGGING SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditi
15、oning 1 h and 16 h) Fog Number, min 95 Formation of excessive amounts of clear film or droplets is cause for rejection 3.7 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. ENGINEERING MATERIAL S
16、PECIFICATION WSK-M4D840-A1/A3 Copyright 2011, Ford Global Technologies, LLC Page 4 of 8 3.8 WEATHERING RESISTANCE After exposure in accordance with 3.8.1, 3.8.2 and 3.8.3, the material shall show no color change in excess of specified Gray Scale Rating (AATCC Evaluation Procedure 1/ISO 105-A02). In
17、addition, there shall be no cracking, crazing or other deterioration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by washing with mild detergents and water (ratio 5:95 by volume), or equivalent, after the Florida exposure. All initial approval
18、s will be based on the preliminary Weatherometer exposure, pending Florida exposure results for final approval-Not required for North America. 3.8.1 Xenon Arc Weatherometer Rating 4 Required Worldwide except North America (SAE J1885, 1240.8 kJ/m2 exposure min, specimen size: 150 x 100 mm min, 3.2 +/
19、- 0.2 mm thick, molded in smooth polished mold) 3.8.2 12 Months Florida Rating 4 Not required for North America (FLTM BI 160-01, 5 south, direct weathering inland, specimen size: 150 x 100 mm min, 2.0 +/- 0.2 mm thick molded in smooth polished mold) 3.8.3 Filtered Xenon Arc Weatherometer Rating 4 Re
20、quired for North America (SAE J1885 modified (FLTM BO 116-01), 2406.4 kJ/m2 exposure min, specimen size: 150 x 100 mm min, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements
21、 of these specifications. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 10 16-5/C (ASTM E 831 TMA, temperature range 20 to 100 C) ENGINEERING MATERIAL SPECIFICATION WSK-M4D840-A1/A3 Copyright 2011, Ford Global Technologies, LLC Page 5 of 8 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2
22、mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.6 - 2.1% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.10 - 0.40% . After 30 minutes at 120 C 0.10 - 0.40% 5.3 WATER ABSORPTION 0.20 - 0.30% (ISO 62, 24 h, 50 +/- 1 mm diamete
23、r, 3.1 +/- 0.1 mm thick specimen) 5.4 HARDNESS, DUROMETER D 75 - 80 (ISO 868, 15 s dwell) 5.5 DIMENSIONAL STABILITY The phrase “anneal after molding“ shall appear on engineering drawings when dimensional stability and/or improved frictional characteristics are engineering requirements. 5.6 RECYCLING
24、 CODE POM ENGINEERING MATERIAL SPECIFICATION WSK-M4D840-A1/A3 Copyright 2011, Ford Global Technologies, LLC Page 6 of 8 ENGINEERING MATERIAL SPECIFICATION WSK-M4D840-A1/A3 Copyright 2011, Ford Global Technologies, LLC Page 7 of 8 ENGINEERING MATERIAL SPECIFICATION WSK-M4D840-A1/A3 Copyright 2011, Ford Global Technologies, LLC Page 8 of 8
