1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2013 04 03 N Status Replaced by WSB-M4D857-A2 L. Soreide, NA 2005 12 07 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1990 03 01 Released C/01031533 P. Kuntze Controlled document at www.MATS Copyright 2013, Ford Global Tech
2、nologies, LLC Page 1 of 5 STYRENE MALEIC ANHYDRIDE (SMA) COPOLYMER RUBBER WSK-M4D724-A2 MODIFIED, 20% GLASS FIBER/10% ACRYLIC REGRIND REINFORCED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a molding compound based on 20% glass fiber and up to
3、 10% acrylic regrind reinforced, rubber modified styrene maleic anhydride copolymer. The glass fibers are coated with a non- PVA (polyvinyl acetate) binding agent. 2. APPLICATION This specification was released originally for material used for instrument panel carrier. 3. REQUIREMENTS 3.0 STANDARD R
4、EQUIREMENTS 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 2.0 - 3.5 g/ (ISO 1133/ASTM D 1238, 220 C, 10 kg) 10 minutes The material shall be dried
5、for min of 2 h at 80-85 C in a mechanical convection oven immediately preceding the test. 3.4.2 Glass Fiber Content 18 - 22% (ISO 3451/1, Method A, at 650 +/- 25 C, test portion 2.5 - 3.0 g) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be ca
6、rried 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 dimensions shall be cut from the center portion of the test specimen A and/or B. The specime
7、ns shall be prepared according to ISO 294. No annealing allowed. ENGINEERING MATERIAL SPECIFICATION WSK-M4D724-A2 Copyright 2013, Ford Global Technologies, LLC Page 2 of 5 3.5.2 Density 1.17 - 1.23 g/cm3 (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 60 MPa (ISO R
8、 527/ASTM D 638M, 150 x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) 3.5.4 Flexural Modulus, min 6.0 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 1.05 - 1.74 GPa (ASTM D 4065, forced constant amplitude,
9、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 minimum) Additionally, a Shear Modulus vs. Temperature curve shall be plott
10、ed 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 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 10 kJ/m
11、2 3.5.6.2 At -40 +/- 2 C 10 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 cold box, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temper
12、ature, min 118 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 1.82 MPa) 3.5.8 Vicat Softening Temperature, min 120 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 spec
13、imens 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 WSK-M4D724-A2 Copyright 2013, Ford Global Technologies, LLC Page 3 of 5 3.5.9 Heat Ageing Performance (ISO 188/ASTM
14、D 573, 150 +/- 50 air changes/h, 1000 h at 100 +/- 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 Strength, Izod Change +/- 15% (Test Method per para 3.5.6.1, s
15、pecimens to be notched before heat ageing) 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 FOGGING (FLTM BO 116-03) Fog Number, min 95 Formation of excessive amounts of clear film or dr
16、oplets 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 OF LINEAR THERMAL EXPANSION 3.6-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/
17、- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.2 - 0.4% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.1% . After 30 min at 120 C 0.1% 5.3 MELT VOLUME RATE 1.8 - 3.0 cm3/ (ISO 1133/ASTM D 1238, 220 C, 10 kg) 10 minute
18、s The material shall be dried for min of 2 h at 80 - 85 C in a mechanical convection oven immediately preceding the test. ENGINEERING MATERIAL SPECIFICATION WSK-M4D724-A2 Copyright 2013, Ford Global Technologies, LLC Page 4 of 5 5.4 HEAT DEFLECTION TEMPERATURE, min 122 C (ISO 75/ASTM D 648, 120 x 10
19、 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 or SMA-GF20 OPTIONAL SMA-GF20 ENGINEERING MATERIAL SPECIFICATION WSK-M4D724-A2 Copyright 2013, Ford Global Technologies, LLC Page 5 of 5
