1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2008 03 14 N-STATUS Replaced by WSS-M4D585-B G. Kowalski 2006 03 30 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1992 01 09 Released NB00I10043054141 M. Myers Printed copies are uncontrolled Copyright 2008, Ford Global Technologi
2、es, LLC Page 1 of 5 POLYCARBONATE + ABS BLEND, (PC+ABS) MEDIUM WSB-M4D816-A IMPACT, VERY HIGH HEAT MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a very high heat, medium impact molding compound based on a modified polycarbonate + acrylonitrile-
3、butadiene-styrene (PC+ABS) blend. 2. APPLICATION This specification was released originally for material used for exterior rearview mirror glass backs. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requi
4、rements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 10 - 15 g/10 minutes (ISO 1133/ASTM D 1238, 260 C, 5 kg) The material shall be dried for minimum of 2 h at 90 - 100 C in a mechanical convection oven immediately preceding the test. 3.5 MOLDED TEST SPECIMEN
5、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 dimensio
6、ns 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 WSB-M4D816-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 5 3.5.2 Density
7、 1.11 - 1.16 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 55 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.5.3.1 Elongation at Break, min 4.5% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 1
8、9 GPa (ISO 178/ASTM D 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 736 - 1140 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 th
9、e center of specimen 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 +150 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance
10、 range shown on page 5. 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 20 kJ/m2 3.5.6.2 At -20 +/- 2 C 8.0 kJ/m2 3.5.6.3 At -40 +/- 2 C 5.0 kJ/m2 The test specimens must be conditioned f
11、or 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. 3.5.7 Heat Deflection Temperature, min 105 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. A
12、t 1.82 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. ENGINEERING MATERIAL SPECIFICATION WSB-M4D816-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page
13、3 of 5 3.5.8 Vicat Softening Temperature, min 136 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 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
14、 stored in a sealed, moisture-proof container filled with silica gel. 3.5.9 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 85 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength Change +/- 25%
15、 (Test Method per para 3.5.3) 3.5.9.2 Impact Strength, Izod Change +/- 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 2.5 +/- 0.1 mm with a smooth s
16、urface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 68 Formation of excessive amounts of clear film or droplets is cause for rejection. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT
17、OF LINEAR THERMAL EXPANSION 6.5-5/C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) ENGINEERING MATERIAL SPECIFICATION WSB-M4D816-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 4 of 5 5.2.1 Molding Shrinka
18、ge . After 48 h at 23 +/- 2 C 0.5 - 0.8% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.6 - 0.9% . After 30 min at 120 C 0.6 - 0.9% 5.3 HEAT DEFLECTION TEMPERATURE, min 126 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 0.45 MPa) All specimens d
19、ry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. 5.4 INSTRUMENTED IMPACT STRENGTH, min (ASTM D 3763, 50 mm diameter, 3.2 +/- 0.2 mm thickness specimens, 12.7 mm dart, 38 mm support opening) At 23 C 60.9 J At
20、 -30 C 47.6 J 5.5 MELT FLOW RATE 8.2 g/10 minutes (ISO 1133/ASTM D 1238, 250 C, 5 kg) The material shall be dried for min of 2 h at 90 - 100 C in a mechanical convection oven immediately preceding the test. 5.6 RECYCLING CODE SAE ABS+PC ENGINEERING MATERIAL SPECIFICATION WSB-M4D816-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 5 of 5
