1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2013 04 03 N Status No replacement named L. Soreide, NA 2010 01 11 Revised Revised para 3.5.5 H. Santos 1994 12 16 Released NB00I10043054410 M. Trapp Controlled document at www.MATS Copyright 2013, Ford Global Technologies, LLC Page 1
2、of 5 STYRENE/MALEIC ANHYDRIDE (SMA) COPOLYMER, WSB-M4D724-A4 RUBBER MODIFIED MOLDING COMPOUND, 20% GLASS FIBER REINFORCED BLEND WITH 10% MAXIMUM PMMA REGRIND AND 20% MAXIMUM RECLAIM AND/OR REGRIND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a molding compound
3、 based on a rubber modified styrene/maleic anhydride copolymer (SMA), reinforced with 20% glass fiber blended with 0 - 10% acrylic regrind and 0 - 20% manufactured reclaim or regrind or any combination of reclaim or regrind which totals up to a maximum of 20% of the molding compound by weight (see p
4、aragraph 5.4 for definitions of regrind, reclaim or recyclate). The glass fibers are coated with a non-PVA (polyvinyl acetate) binding agent. The final material blend (containing 20% reclaimed SMA) shall not exceed 0.1% PVC+ABS skin and 0.1% polyurethane foam. 2. APPLICATION This specification was r
5、eleased originally for material used for injection molding substrates for foamed/covered instrument panels. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P11
6、11-A). 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 2.0 - 3.5 g/10 minutes (ISO 1133, 220 C, 10 kg) Note: Melt flow rate is for molding compound with 0 - 10% acrylic resin as supplied. Melt flow of physical blends of compound reclaim/regrind are not practical because of irregular shapes/size of rec
7、laim/regrind and non-uniformity of blend. (s) 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 SPECIMENS 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end gated
8、 test specimens. ENGINEERING MATERIAL SPECIFICATION WSB-M4D724-A4 Copyright 2013, Ford Global Technologies, LLC Page 2 of 5 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
9、 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 1.17 - 1.25 g/cm3 (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Max Load, min 62.0 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min
10、test speed) 3.5.4 Flexural Modulus, min 4.8 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C to be reported (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 60 x 10 x
11、 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 versus Temperature curve shall be plotted for -50 to +150 C temperature range, at 5 C minimum intervals. The plotte
12、d curve must be within tolerance range shown on page 5. (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 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 +/- 1 C 3.5 kJ/m2 The test specimens must be conditioned for minimum of 6 h at the a
13、bove specified temperature prior to impact test. Low temperature testing shall be done within the cold box. (s) 3.5.7 Heat Deflection Temperature, min 115 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise 0.32 +/- 0.1 mm deflection. At 1.80 MPa) ENGINEERING MATERIAL SPECIFICATION WSB-M4D724-A4
14、 Copyright 2013, Ford Global Technologies, LLC Page 3 of 5 (s) 3.5.8 Vicat Softening Temperature, min 115 C (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - silicone oil, temperature raise 50 +/- 5 C/h. Dial gage reset to 0 after addition of 5 kg weight. At 50 N load) All specimens dry as molded
15、. 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 188, except 150 +/- 50 air changes/h, 1000 h at 100 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3
16、 - 5 h at 23 +/- 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, Izod Change +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before heat a
17、ging) 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h) Fog Number, min 95 Formation of clear film, droplets or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 35
18、5 x 100 x 1.6 +/- 0.1 mm with a smooth surface. 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 2.5-5/ C (ASTM E 831 (TMA), temperature range -30 to +30 C) E
19、NGINEERING MATERIAL SPECIFICATION WSB-M4D724-A4 Copyright 2013, Ford Global Technologies, LLC Page 4 of 5 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 0.2 - 0.4% 5.3 HEAT DEFLECTION TEMPERATURE, min 122
20、.8 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 1 mm deflection. At 0.45 MPa) 5.4 DEFINITIONS REGRIND SMA: Injection molded surface flawed parts, sprues and runners are granulated. Without any additional processing, this SMA material is blended at 40% maximum with virgin SMA mat
21、erial to injection mold parts. RECLAIMED SMA: Injection molded SMA parts are used in conjunction with a PVC+ABS skin and polyurethane (PUR) foam to manufacture interior components (i.e. instrument panels). These composite panels, including trimming offal, are granulated, and SMA is extracted from PV
22、C+ABS skin and polyurethane foam by a Ford Motor Company patented process. The reclaimed SMA material can contain a maximum of 2.0% PVC+ABS and 0.5% polyurethane foam (for total of 2.5% PVC+ABS/PUR foam by weight). This reclaimed SMA material is blended at 40% maximum with virgin SMA material to inj
23、ection mold parts. RECYCLATE: Plastic resin recovered from post consumer products. This material is salvaged, separated/purified by various processes, possible enhanced with additives, and used to injection mold parts. 5.5 MULTI AXIAL IMPACT AT MAX LOAD, min (ASTM D 3763, 100 x 100 x 2.5 +/- 0.2 mm
24、edge gated injection molded specimens) Test velocity at initial contact with the test specimen shall be 6.7 m/s and must not change by more than 10% during the impact event. Load energy and velocity are to be recorded as a function of displacement. 5.5.1 At 23 C 6.3 J 5.5.2 At -30 C 6.1 J 5.6 RECYCLING CODE SMA-GF20+PMMA 6. SUMMARY OF REVISIONS 2010 01 11 Revised item 3.5.5 to be report ENGINEERING MATERIAL SPECIFICATION WSB-M4D724-A4 Copyright 2013, Ford Global Technologies, LLC Page 5 of 5
