1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 21 N-STATUS No replacement named J. Cirst, NA 2006 07 20 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1996 03 05 Activated M. Myers Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 6
2、POLYCARBONATE + POLYETHYLENE TEREPHYTHALATE + WSS-M4D948-A1 POLYBUTYLENE TEREPHTHALATE BLEND (PC+PET+PBT) 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, polyethylene t
3、erephthalate and polybutylene terephthalate. 2. APPLICATION 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 conf
4、orm 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 Flow Rate 9 - 13 g/10 minutes (ISO 1133, 265 C, 2.16 kg
5、) The material shall be dried for 4 h minimum at 105 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 injection molded one-end gated test specimens. The followin
6、g dimensions are required: A. 150 minimum x 10 x 4.0 +/- 0.2 mm (ISO 3167, Type 1A) B. 60 x 60 x 2.0 +/- 0.1 mm (ISO/DIS 294-3) C. 355 x 100 x 1.0 +/- 0.1 mm (ISO 3795) Test specimen A shall be molded using molding conditions defined in ISO 7792-2. Specimens with shorter dimensions shall be cut from
7、 the center of the specimen A. No annealing allowed. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D948-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 6 3.5.2 Density 1.17 - 1.25 g/cm (ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Yield, min 50 MPa (ISO 527-1
8、 & ISO 527-2, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, test speed: 50 mm/minute) (s) 3.5.3.1 Elongation at Yield, min 120% (Test Method according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 2.0 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, 1.7 mm/min test sp
9、eed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 710 - 1070 MPa (ASTM D 5279, 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 ea
10、ch 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 plotted curve must be within tolerance range granted on the original material approval and it shall constitute the r
11、eference standard for materials supplied to this specification and shall be kept on file at the designated material laboratory and be available on request. (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, 10 specimens for each test
12、) 3.5.6.1 At 23 +/- 2 C 30 kJ/m 3.5.6.2 At -40 +/- 1 C 8 kJ/m 3.5.6.3 At -(20) +/- 2 C 11 kJ/m The test specimen must be conditioned for minimum of 6 hours at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold chamber, if not possible, test ma
13、y be conducted outside, but within 5 seconds. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D948-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 6 (s) 3.5.7 Heat Deflection Temperature, min 90 C (ISO 75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm specimen use center se
14、ction of specimen A, flatwise, 0.34 +/- 0.1 mm deflection. At 1.80 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. (s) 3.5.8 Vicat Softening Temperature, min 119 C (ISO 306, 10 x 10 x 4.
15、0 +/- 0.2 mm specimens use center section of specimen A. 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 c
16、ontainer filled with silica gel. 3.5.9 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 85 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Yield Change +/- 25% 3.5.9.2 Impact Strength, Izod C
17、hange +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.29 +/- 0.1 mm (use specimen C) with a smooth surface. 3.7 WEATHERING RESISTANCE
18、After exposure in accordance with 3.7.1, 3.7.2, and 3.7.3, the material 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. A slight loss of gloss or chalking will be
19、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 approvals will be based on the preliminary Weatherometer exposure, pendi
20、ng Florida and Arizona exposure results for final approval. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D948-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 6 3.7.1 Xenon Arc Weatherometer Rating 4 (SAE J1960, 1250 kJ/m exposure minimum, specimen size: 60 x 60 m
21、inimum, 2.0 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 3.7.2 12 months Florida Rating 4 12 months Arizona (SAE J1976, 5 south, direct weathering inland, specimen size: 60 x 60 minimum, 2.0 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 3.7.3 24 mon
22、ths Florida Rating 3 - 4 24 months Arizona (SAE J1976, 5 south, direct weathering inland, specimen size: 60 x 60 minimum, 2.0 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meet
23、ing the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 7.1-5/ C (ASTM E 831 TMA, temperature range -30 to 30 C) 5.2 MOLD SHRINKAGE (ISO/DIS 294-3, 60 x 60 x 2.0 +/- 0.1 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.68% 5.2.2 Post
24、Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.15% . After 3 h at 120 C 0.35% 5.3 MELT TEMPERATURE 270 C (ISO 3146, Method C, 10 C/min heating rate) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D948-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies,
25、LLC Page 5 of 6 5.4 HEAT DEFLECTION TEMPERATURE 90 C (ISO 75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specimen A, flatwise, 0.34 +/- 0.1 mm deflection. At 0.45 MPa) 5.5 STAIN AND STRESS CRACKING RESISTANCE To ensure adequate durability to the operating environment for th
26、e cowl vent grille application, material was tested for chemical resistance and for stain resistance before and after weathering exposure to the concentrated windshield washer solution. Any material under consideration 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. 5.6 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PC+PET+PBT ENGINEERING MATERIAL SPECIFICATIONWSS-M4D948-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 6 of 6
