1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2008 03 14 N-STATUS Replaced by WSS-M4D585-B, WSB-M4D813-A or WSS-M4D924-A G. Kowalski 2006 02 24 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1992 06 01 Released EP00E10176270000 P. Kuntze Printed copies are uncontrolled Copyrig
2、ht 2008, Ford Global Technologies, LLC Page 1 of 6 ABS + POLYCARBONATE (ABS+PC) BLEND, MEDIUM WSK-M4D791-A3 HEAT RESISTANT, IMPROVED LOW TEMPERATURE IMPACT MOLDING COMPOUND, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a medium heat resistant molding
3、compound based on acrylonitrile/butadiene/styrene + polycarbonate blend (ABS+PC) with improved low temperature impact. 2. APPLICATION This specification was released originally for material used for visible exterior body parts. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Mater
4、ial 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 10 - 16 g/10 minutes (ISO 1133/ASTM D 1238, 260 C, 5 kg) The material shall be dried for 2 h minimum at 105 - 110 C in a mechanical
5、 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 min x 10 x 4.0 +/- 0.2 mm (Tensile B
6、ar, 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. ENGINEERING MATERIAL SPECIFICATION WSK-M4D791-A3 Printed copies are uncontrol
7、led Copyright 2008, Ford Global Technologies, LLC Page 2 of 6 3.5.2 Density 1.11 - 1.18 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 48 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed (unfilled), 5 mm/min (filled) 3
8、5.3.1 Elongation at Break, min 50% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 1.8 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
9、 +/- 0.2 mm) 3.5.5 Shear Modulus at 23 C 620 - 900 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
10、interval - 3 minutes minimum). Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +140 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
11、A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 45 kJ/m2 3.5.6.2 At -40 +/- 2 C 20 kJ/m2 3.5.6.3 At -20 +/- 2 C 35 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
12、shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. ENGINEERING MATERIAL SPECIFICATION WSK-M4D791-A3 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 3 of 6 3.5.7 Heat Deflection Temperature, min 105 C (ISO 75/ASTM D 64
13、8, 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 1.80 MPa) 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 117 C (I
14、SO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - 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 w
15、ith silica gel. 3.5.9 Heat Aging Performance (ISO 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 Change, max +15% (Test Method per para 3.5.3) 3.5.9.2 Impact Strengt
16、h, Izod Change, max -25% (Test Method per para 3.5.6.1, 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 1.6 +/- 0.1 mm with a smooth surface. 3.7 WEATHERING RESISTANCE After exposure i
17、n accordance with 3.7.1, 3.7.2 and 3.7.3, the material shall show no color change in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, there shall be no cracking, crazing or other deterioration. A slight loss of gloss or chalking will be allowed provided
18、an acceptable appearance can be achieved by polishing with Ford car polish (auto wax) at permission 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. ENGINEERING
19、MATERIAL SPECIFICATION WSK-M4D791-A3 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 4 of 6 3.7.1 Xenon Arc Weatherometer Rating 4 (SAE J1960, 660 kJ/m2 exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7
20、2 12 months Florida Rating 4 (FLTM BI 160-01, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.7.3 24 months Florida Rating 3-4 (FLTM BI 160-01, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3
21、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. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 7.5 - 8.2-5/C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577,
22、 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 0.5 - 0.7% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.03 - 0.10% . After 30 min at 120 C 0.15 - 0.25% 5.3 MELT VOLUME RATE (ISO 1133/ASTM D 1
23、238) 5.3.1 At 260 C, 5 kg 10 - 16 cm3/10 minutes 5.3.2 At 250 C, 5 kg 5 - 11 cm3/10 minutes The material shall be dried for 2 h minimum at 105 - 110 C in a mechanical convection oven immediately preceding the test. ENGINEERING MATERIAL SPECIFICATION WSK-M4D791-A3 Printed copies are uncontrolled Copy
24、right 2008, Ford Global Technologies, LLC Page 5 of 6 5.4 HEAT DEFLECTION TEMPERATURE, min 122 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 0.45 MPa) 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. 5.5 RECYCLING CODE SAE ABS+PC or ABS+PC ENGINEERING MATERIAL SPECIFICATION WSK-M4D791-A3 Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 6 of 6
