1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 11 16 N-STATUS No replacement named A. Pan, APA 2006 05 30 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 1995 03 14 Activated M. Myers Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 6
2、POLYCARBONATE + POLYETHYLENE TEREPHTHALATE WSS-M4D879-A3 BLEND (PC + PET) MOLDING COMPOUND, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic molding compound based on a blend of polycarbonate and polyethylene terephthalate. 2. APPLICATION
3、This specification was released originally for material used for exterior weatherable applications such as cowl vent grilles. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Mat
4、erials (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 Flow Rate 8 - 18 g/10 minutes (ISO 1133, 265 C, 5.0 kg) The material shall be dried for 4 h minimum at 110 C in a m
5、echanical convection oven with a dew point of - 18 C or less 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 injection molded one-end gated test specimens. The following dimensions are required:
6、 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 prepared according to ISO 294. No annealing allowed. ENGINEERING MATERIAL SPECIFICATIO
7、NWSS-M4D879-A3Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 6 3.5.2 Density 1.18 - 1.26 g/cm (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Yield, min 40 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed (unfilled), 5 mm/mi
8、n (filled) (s) 3.5.3.1 Elongation at Yield, min 100% (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 1.7 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 650 - 970 MPa (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 versus Temperature curve shall be pl
10、otted for -50 to +210 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 6. (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 50 kJ/m 3.5.6.2 At -40 +/- 1 C
11、 11 kJ/m 3.5.6.3 At -20 +/- 2 C 46 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 Temperature, min (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen
12、, edgewise, 0.32 +/- 0.01 mm deflection) 3.5.7.1 At 1.80 MPa 65 C 3.5.7.2 At 0.45 MPa 71 C ENGINEERING MATERIAL SPECIFICATIONWSS-M4D879-A3Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 6 (s) 3.5.8 Vicat Softening Temperature, min 98 C (ISO 306, 10 x 10 x 4.0
13、+/- 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 filled with silica gel. 3.
14、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 - 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 S
15、trength at Yield 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 aging) 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C heating, 21 C cooling plate) Fog Number, min 95 Formation of clear film, dropl
16、ets or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO 3795/SAE J369) 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 exposure in accordance with 3.8.1, 3.8.2, and 3.8.3, the mat
17、erial shall show no 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. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D879-A3Printed copies are uncontrolled Copyright 2010, Ford Global Te
18、chnologies, LLC Page 4 of 6 A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by washing and/or polishing with Ford car polish (auto wax) after the outdoor exposure, at permission of the affected Product Development Materials Activity. All initial a
19、pprovals will be based on the preliminary Weatherometer exposure, pending Florida and Arizona exposure results for final approval. 3.8.1 Xenon Arc Weatherometer Rating 4 (SAE J1960, 1250 kJ/m exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold)
20、 3.8.2 12 months Florida Rating 4 12 months Arizona (NAAO only) (SAE J1976, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.8.3 24 months Florida Rating 3-4 24 months Arizona (NAAO only) (SAE J1976, 5 south, direct weat
21、hering inland, 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 EXPANSION 6.
22、5-5/ C (ASTM E 831 (TMA), temperature range -30 to +30 C) 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 0.4% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.2% . A
23、fter 30 min at 120 C 0.5% ENGINEERING MATERIAL SPECIFICATIONWSS-M4D879-A3Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 6 5.3 MELT TEMPERATURE, min 245 C (ISO 3146, Method C, 10 C/min heating rate) 5.4 RECYCLING CODE PC+PET 5.5 STAIN AND STRESS CRACKING RESIS
24、TANCE To ensure adequate durability to the operating environment for the cowl vent grille application, material was tested for chemical resistance. Material was also tested for stain resistance to the concentrated windshield washer solution before and after weathering exposure. Any material under co
25、nsideration for this application must also be tested for stain and stress cracking resistance as defined in the DVP&R, SDS and/or Engineering Specification for the component. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D879-A3Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 6 of 6
