1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2008 08 18 N-STATUS Replaced by WSB-M4D924-A G. Kowalski 2006 06 28 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 1996 05 17 Activated Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 1 of 5 POLY
2、CARBONATE + ACRYLONITRILE/BUTADIENE/STYRENE WSB-M4D923-A BLEND (PC+ABS) MOLDING COMPOUND, INTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic UV stabilized, medium heat resistant molding compound based on polycarbonate + acrylonitrile/butadie
3、ne/styrene blend (PC+ABS). 2. APPLICATION This specification was released originally for material used for interior knee bolster cover applications. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENT FOR PRODUCTION MATE
4、RIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1.1 All requirements of this specification, identified by symbol(s), shall be met with data representing 3 sigma values. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flo
5、w Rate 3.0 - 4.0 g/ (ISO 1133, 260 C, 2.16 kg) 10 minutes The material shall be dried for 5 h minimum at 100 C in a mechanical 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 inj
6、ection 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 specimens shall be prep
7、ared according to ISO 294. No annealing allowed. ENGINEERING MATERIAL SPECIFICATION WSB-M4D923-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 5 3.5.2 Density, min 1.13 g/cm (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Yield, min 47 MPa (ISO R 527, 150
8、 minimum x 10 x 4.0 +/-0.2 mm specimen, 50 mm/min test speed) (s) 3.5.3.1 Elongation at Break, min 90% (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 2.2 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 700 -
9、 1050 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 interval - 3 minutes minimum) Additionally, a
10、 Shear Modulus versus Temperature curve shall be plotted for -50 to +150 C temperature range, at 5 C minimum intervals. The plotted 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
11、.5.6.1 At 23 +/- 2 C 46 kJ/m 3.5.6.2 At -40 +/- 1 C 7 kJ/m 3.5.6.3 At -20 +/- 2 C 11 kJ/m 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. (s) 3.5.7 Heat Deflection Temperatur
12、e, min (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen,edgewise, 0.32 +/- 0.01 mm deflection) 3.5.7.1 At 1.80 Mpa 96 C 3.5.7.2 At 0.45 Mpa 119 C 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. EN
13、GINEERING MATERIAL SPECIFICATION WSB-M4D923-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 3 of 5 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 70 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator
14、for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensile Strength Change, max +/- 25% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before
15、 heat aging) 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 90 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 materia
16、l approval is 355 x 100 x 3.2 +/- 0.1 mm with a smooth surface. 3.8 WEATHERING RESISTANCE After exposure in accordance with 3.8.1 and 3.8.2 the material shall show no fading or color change in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, there shall
17、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 washing with mild detergents and water (ratio 5:95 by volume), or equivalent, after the Florida exposure. All initial approvals will be based on the
18、 preliminary Weatherometer exposure, pending Florida exposure results for final approval. 3.8.1 Xenon Arc Weatherometer Rating 4 (SAE J1885, 301 kJ/m exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) ENGINEERING MATERIAL SPECIFICATION WSB-M4
19、D923-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 4 of 5 3.8.2 12 months Florida Rating 4 (FLTM BI 160-01, 5 south, under glass*, specimen size: 150 x 100 mm, minimum 3.2 +/- 0.2 mm thick, molded in smooth polished mold) *PPG Herculite K, tempered safety glass
20、, 3 mm thick 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 6.0 - 9.0 -5/ C (ASTM E 831 TMA, temperature range 25 to + 50 C) 5.2 MOLD SHRINKAGE (ISO 2577, a
21、pprox. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.4 - 0.9% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.4 - 0.9% . After 30 min at 120 C 0.4 - 0.9% 5.3 VICAT SOFTENING TEMPERATURE, min 119 C (I
22、SO 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. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container fille
23、d with silica gel. 5.4 RECYCLING CODE PC+ABS 5.5 Gray Scale referenced in para 3.8 is available from: British Standards Institution AATCC 3 York Street P.O Box 12215 Manchester M2 2AT Research Triangle Park United Kingdom North Carolina 27709 U.S.A. ENGINEERING MATERIAL SPECIFICATION WSB-M4D923-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 5 of 5
