1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 04 2013 08 01 N Status Replaced by WSS-M4D833-B1 M. Gramlich, NA 2006 04 12 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 1991 12 17 Released NB00I10043054139 M. Myers Controlled document at www.MATS Copyright 2013, Ford Glob
2、al Technologies, LLC Page 1 of 5 ACRYLONITRILE STYRENE ACRYLATE (ASA), MEDIUM WSB-M4D833-A 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 (ASA). 2. APPLICATION T
3、his specification was released originally for material used for unpainted black exterior applications that were previously painted ABS such as tail lamp housings. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Sta
4、ndard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 3.0 - 12.0 g/ (ISO 1133/ASTM D 1238, 220 C, 10.0 kg) 10 minutes The material shall be dried for 2 h minimum at 90 C in a mechanical convection oven immediately preceding the test. 3.5 MOLDED TEST
5、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 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
6、 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 1.04 - 1.15 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATION WSB-M4D833-A Copyright 2013, For
7、d Global Technologies, LLC Page 2 of 5 3.5.3 Tensile Strength at Yield, min 38 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, min 8.0% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 1.9 GPa (ISO 178/ASTM D
8、790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 700 - 1060 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.
9、 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 +120 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5.
10、 3.5.6 Impact Strength, Izod, min (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) 3.5.6.1 At 23 +/- 2 C 7.0 kJ/m2 3.5.6.2 At -40 +/- 2 C 3.0 kJ/m2 3.5.6.3 At -20 +/- 2 C 6.5 kJ/m2 The test specimens must be conditioned for minimum of 6 h at t
11、he 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 75 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 1.82 MPa) All specime
12、ns 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 96 C (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - silicone oil, temp. raise 50 +/- 5 C/h. Dial gage reset t
13、o 0 after addition of 5 kg weight. At 49.0 N load) ENGINEERING MATERIAL SPECIFICATION WSB-M4D833-A Copyright 2013, 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 wit
14、h silica gel. 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 determination) 3.5.9.1 Tensile Strength at Change +/- 25% (Test Method per para 3.5.3) 3.5.9.2 Impact Strength
15、, Izod Change +/- 25% (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 conditioning 1 h) Fog Number, min 90 Formation of clear film, droplets or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO
16、 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 2.5 +/- 0.1 mm with a smooth surface. 3.8 WEATHERING RESISTANCE After exposure in accordance with 3.8.1, 3.8.2 and 3.8.3, the material shall show no fading or color change in excess of specified AATCC
17、 rating (AATCC Gray Scale for Evaluating Change in Color, 10 step). 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
18、 of the affected Product Development Materials Activity. 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 exposure minimum, specimen size: 150 x 100 mm min
19、imum, 3.2 +/- 0.2 mm thick, molded in smooth untextured mold) ENGINEERING MATERIAL SPECIFICATION WSB-M4D833-A Copyright 2013, Ford Global Technologies, LLC Page 4 of 5 3.8.2 12 Months Florida Rating 4 (SAE J1976, Procedure A, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3
20、.2 +/- 0.2 mm thick, molded in smooth untextured mold) 3.8.3 24 Months Florida Rating 3-4 (SAE J1976, Procedure A, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth untextured mold) 5. GENERAL INFORMATION The information given below is pr
21、ovided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 9.7-5/ C (ASTM D 696) 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
22、0.4 - 0.6% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.5 - 0.7% 5.3 HEAT DEFLECTION TEMPERATURE 91 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 0.45 MPa) 5.4 RECYCLING CODE SAE OR ASA ASA OPTIONAL ENGINEERING MATERIAL SPECIFICATION WSB-M4D833-A Copyright 2013, Ford Global Technologies, LLC Page 5 of 5
