1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 4 2012 12 04 N-Status Replaced by WSS-M4D924-B1 L. Shen, APA 2010 05 25 Revised See Summary of Revisions Marcos Rogerio Souza 1999 03 05 Activated M. Masserant Controlled document at www.MATS Copyright 2012, Ford Global Technologies, LLC
2、 Page 1 of 5 POLYCARBONATE + ACRYLONITRILE/BUTADIENE/STYRENE WSB-M4D924-A BLEND (PC+ABS), HIGH LOW TEMPERATURE IMPACT N-STATUS MOLDING COMPOUND, INTERIOR 1. SCOPE The material defined by this specification is a thermoplastic UV stabilized, medium heat resistant, high low temperature impact molding c
3、ompound based on polycarbonate + acrylonitrile/butadiene/styrene blend (PC+ABS). 2. APPLICATION This specification was released originally for material used in interior instrument panel trim applications. Approved for below the beltline applications only. 2.1 LIMITATIONS The use of HALS (Hindered Am
4、ine Light Stabilizers) is prohibited in PC-ABS materials. 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-M99P1111-A). 3.1.1 All requirements of this specificatio
5、n, identified by symbol(s), shall be met with data representing 3 sigma values. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate Report Value (ISO 1133, 260 C, 2.16 kg) Reference para 5.5 The material shall be dried for 5 h minimum at 100 C in a mechanical convection oven immediately preceding the test
6、. 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. ENGINEERING MATERIAL SPECIFICATION WSB-M4D924-A Copyright 2012, Ford Global Technologies, LLC Page 2 of 5 The following dimension
7、s are required: A. 150 minimum 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 prepared according to ISO 254. No annealing allowed. 3.5.2 Density
8、Report Value (ISO 1183, Method A) Reference para 5.6 (s) 3.5.3 Tensile Strength at Yield, min 49 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/minute test speed) (s) 3.5.3.1 Elongation at Break, min 40S (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 2.0 GPa
9、 (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) (s) 3.5.5 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.5.1 At 23 +/- 2 C 42 kJ/m2 3.5.5.2 At -29 +/- 2 C 30 kJ/m2 The test specimens must be conditi
10、oned 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) 3.5.6 Heat Deflection Temperature, min (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection) 3.5.6.1 At 1.60 MPa 100 C 3.5.6.2
11、 At 0.45 MPa 114 C All specimens dry as molded. If not treated immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. ENGINEERING MATERIAL SPECIFICATION WSB-M4D924-A Copyright 2012, Ford Global Technologies, LLC Page 3 of 5 3.5.7 Vicat Softe
12、ning Temperature, min 126 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. If not tested immediately after molding, specimens must be stored in a sealed,
13、 moisture-proof container filled with silica gel. 3.5.8 Heat Aging Performance (ISO 156, except 150 +/- 50 air changes/h. 1000 h at 70 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of t
14、he aged properties determination) 3.5.8.1 Tensile Strength Change, +/- 25 max (Test Method per para 3.5.3) 3.5.8.2 Impact Strength Change, +/- 25 max (Test Method per para 3.5.5.1, specimens to be notched before heat aging) 3.6 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test
15、conditioning 1 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 material approval is 355 x 100 x 3.2 +/- 0.1 mm with a smooth surface. 3.8 WEATHERING RESISTANCE After ex
16、posure 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 be no cracking, crazing or other deterioration. A slight loss of gloss or chalking will be allowed
17、 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. ENGINEERING MATERIAL SPECIFICATION WSB-M4D924-A Copyright 2012, Ford Global Technologies, LLC Page 4 of 5 All initial approvals will be base
18、d on the preliminary Weatherometer exposure, pending Florida exposure results for final approval. 3.8.1 Xenon Arc Weatherometer Rating 4 (SAE J1885, 301 kJ/m2 exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.8.2 12 months Florida Rating 4
19、 (FLTM BI 160-01, 5 south, specimen size: 150 x 100 mm, minimum 3.2 +/- 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 E
20、XPANSION 8.0 - 10.0-5/ C (ASTM E 831 (TMA), temperature range -25 to +50 C) 5.2 MOLD SHRINKAGE (ISO 2577, approximately 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 18 h at 23 +/- 2 C 0.6 - 1.2% 5.2.2 Post Shrinkage (Separate specimens required for each test)
21、 . After 48 h at 80 C 0.7 - 1.1% . After 30 minutes at 120 C 0.7 - 1.2% 5.3 RECYCLING CODE PC+ABS 5.4 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.
22、 S. A. ENGINEERING MATERIAL SPECIFICATION WSB-M4D924-A Copyright 2012, Ford Global Technologies, LLC Page 5 of 5 5.5 MELT FLOW 1 10 g/10 min (per 3.4.1) (Typical) 5.6 DENSITY 1.09 1.14 g/cm3 (per 3.5.2) (Typical) 6. SUMMARY OF REVISIONS 2010 05 25 Melt Flow changed from 1-4 g/10 min to Report Value; Added typical value in 5.5 Density changed from 1.09g/cm3 to Report Value; Added typical value in 5.6 2009 09 16 Revised Added 2.1 Limitations on HALS, Y. Bankowski, NA
