1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 07 14 N-STATUS No replacement A. Pan, APA 2003 10 10 Activated T. Honey Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc. Page 1 of 4 POLYCARBONATE + POLYBUTYLENE TEREPHTHALATE BLEND WSS-M4D928-A2 (PC+PBT), MO
2、DIFIED MOLDING COMPOUND, RECYCLATE, 25% MINIMUM RECYCLED CONTENT NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic molding compound based on polycarbonate and polybutylene terephthalate blend, containing a minimum of 25% post consumer material. 2. A
3、PPLICATION This specification was released originally for material used for non-painted, unexposed front bumper reinforcement beams. 3. REQUIREMENTS 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Product
4、ion 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. 3.2 MOLDING COMPOUND (s) 3.2.1 Melt Flow Rate 13 - 18 g/10 minutes (ISO 1133, 250 C, 5 kg) The material shall be dried for 2 h minimum at 120 -
5、125 C in a mechanical convection oven immediately preceding the test. (s) 3.2.2 Melt Temperature, min 222 C (ISO 3146, Method C, 10 C/min heating rate) 3.3 MOLDED TEST SPECIMEN 3.3.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one-end g
6、ated test specimens. The following 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 1.6 +/-0.1 mm (ISO 3795) ENGINEERING MATERIAL SPECIFICATIONWSS-M4D928-A2 Printed copies are uncontrolled Copyright 2010, For
7、d Global Technologies, Inc. Page 2 of 4 Test specimen A shall be molded using molding conditions defined in ISO 7391-2. Specimens with shorter dimensions shall be cut from the center of the specimen A. No annealing allowed. 3.3.2 Density 1.18 - 1.20 g/cm3(ISO 1183, Method A) (s) 3.3.3 Tensile Streng
8、th at Yield, min 45 MPa (ISO 527-1 & ISO 527-2, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, test speed: 50 mm/minute) (s) 3.3.3.1 Elongation at Break, min 85% (Test Method according to para 3.5.3) (s) 3.3.4 Flexural Modulus, min 1.7 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section
9、of specimen A, 2 mm/min test speed, 64 mm support span) 3.3.5 Shear Modulus at 23 C 570 - 850 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 clam
10、ps 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 plotted curve must be within tolerance range granted on the original material approv
11、al and it shall constitute the reference standard for materials supplied to this specification and shall be kept on file at the designated material laboratory and be available on request. (s) 3.3.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen use center section of specim
12、en A, 10 specimens for each test) 3.3.6.1 At 23 +/- 2 C 45 kJ/m23.3.6.2 At - 40 +/- 1 C 25 kJ/m2The 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 m
13、ay be conducted outside, but within 5 seconds. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D928-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, Inc. Page 3 of 4 (s) 3.3.7 Heat Deflection Temperature, min 84 C (ISO 75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm specimen use center
14、 section 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) 3.3.8 Vicat Softening Temperature, min 117 C (ISO 306, 10 x 10 x
15、 4.0 +/- 0.2 mm specimens use center section of specimen A. Bath - silicone oil, temperature raise 50 +/- 5 C/h. Dial gage reset to O 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-proo
16、f container filled with silica gel. 3.3.9 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 100 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.3.9.1 Tensile Strength at Yield Change +/- 25% (Test Method per para 3.3.3
17、) 3.3.9.2 Impact Strength, Izod Change +/- 25% (Test Method per para 3.3.6.1, specimens to be notched before heat aging) 3.4 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 96 Formation of clear film, droplets or crystals is cause fo
18、r rejection. 3.5 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.6 +/- 0.1 mm (use specimen C) with a smooth surface. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D928-A2 Printed copies are uncontrolled Copyright 2010, Ford G
19、lobal Technologies, Inc. Page 4 of 4 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (ASTM E 831 TMA, temperature range - 40 to + 100 C) 4.1.1 With Flow Dire
20、ction 5.7E-5/ C 4.1.2 Cross-Flow Direction 5.9E-5/ C 4.2 MOLD SHRINKAGE (ISO/DIS 294-3, 60 x 60 x 2.0 +/- 0.1 mm injection molded specimen) 4.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 0.01% 4.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.02% . After 30 minutes at 120 C 0.01% 4.3 HEAT DEFLECTION TEMPERATURE 105 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) 4.4 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES PC+PBT
