1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2013 04 26 N Status No replacement K. Mueller, NA 2005 11 11 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 2001 08 14 Activated M. Myers Controlled document at www.MATS Copyright 2013, Ford Global Technologies, LLC Page 1
2、of 5 ACRYLONITRILE STYRENE ACRYLATE + POLYCARBONATE WSS-M4D682-A5 BLEND (ASA+PC), VERY HIGH HEAT RESISTANT MOLDING COMPOUND, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a molding compound based on acrylonitrile-styrene-acrylate and polycarbonate. 2.
3、APPLICATION This specification was released originally for material used for unpainted black exterior applications, such as mirror housings, fairings and cowl vent grilles. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIRE
4、MEMTS FOR PRODUCTION MATERIALS 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 Melt Flow Rate 9.0 - 18.0 g/10 minutes (ISO 1133/ASTM D 1238, 260 C, 5.0 kg) The material shall be dried for 4
5、 h minimum at 105 C in a mechanical convection oven immediately preceding the test. 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 test specimens. The following dimensions are required: A. 150 m
6、in 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 allowed. 3.5.2 Density 1.11 - 1.22 g/cm3 (ISO 1183,
7、 Method A/ ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATION WSS-M4D682-A5 Copyright 2013, Ford Global Technologies, LLC Page 2 of 5 3.5.3 Tensile Strength at Yield, min 53 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed 3.5.3.1 Elongation at Break
8、, min 17.0% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 2.3 GPa (ISO 178/ASTM D 790M, Method I, Procedure 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) 3.5.5 Shear
9、Modulus at 23 C 540 - 800 MPa (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 temperature interval 3 minutes minimu
10、m) Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +120 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/-0.2 mm s
11、pecimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 20.0 kJ/m2 3.5.6.2 At -40 +/- 2 C 2.0 kJ/m2 3.5.6.3 At -10 +/- 2 C 6.0 kJ/m2 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
12、cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min 92 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/-0.2 mm specimen, flatwise at standard deflection of 0.32 +/- 0.01 mm. At 1.80 MPa) ENGINEERING MATERIAL SPECIFICATION WSS-M4D682-A5 Copyright 20
13、13, Ford Global Technologies, LLC Page 3 of 5 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. 3.5.8 Vicat Softening Temperature, min 110 C (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath -
14、 silicone oil, temp. raise 50 +/- 5 C/h. Dial gage reset to 0 after addition of 5 kg weight. At 49.0 N load) 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. 3.5.9 Heat Aging Performance (ISO
15、188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 90 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at +/- 25% Change (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, +/- 25% Izod Change (Test Method per para 3.5.
16、6.1,specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 2.0 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h a
17、nd 16 h) Fog Number, min 90 Formation of clear film, droplets or crystals is cause for rejection. 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
18、-A02). In 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 polishing with Ford car polish (auto wax) at permission of the affected Product Development Materials Activity. ENGI
19、NEERING MATERIAL SPECIFICATION WSS-M4D682-A5 Copyright 2013, Ford Global Technologies, LLC Page 4 of 5 All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida exposure results for final approval. 3.8.1 Xenon Arc Weatherometer Rating 4 (SAE J1960, 1250 kJ/m2 exp
20、osure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.8.2 12 months Florida Rating 4 (SAE J1976, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.8.3 24 months Florid
21、a Rating 3-4 (SAE J1976, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 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 of this specification. 5
22、.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 7.2 8.4 -5/C (ASTM D 696), from -30 C to +30 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 0.6 - 0.8% 5.2.2 Post Shrinkage (Separate specimens required for ea
23、ch test) . After 48 h at 80 C 0.08 - 0.10% 5.3 HEAT DEFLECTION TEMPERATURE 117 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 SAE or ASA + PC OPTIONAL ASA + PC ENGINEERING MATERIAL SPECIFICATION WSS-M4D682-A5 Copyright 2013, Ford Global Technologies, LLC Page 5 of 5
