1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 12 N-STATUS No replacement named J. Crist, NA 2006 01 12 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1992 12 01 Released EP00E10176314000 P. Kuntze Printed copies are uncontrolled Copyright 2010, Ford Global Technologies,
2、 LLC Page 1 of 5 POLYBUTYLENE TEREPHTHALATE (PBT), 10% GLASS WSK-M4D749-A FIBER REINFORCED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 10% glass fiber reinforced thermoplastic polyester molding compound based on polybutylene terephthalate (
3、PBT). 2. APPLICATION This specification was released originally for material used for electrical connectors. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers mist conform to the Companys Standard Requirements For Production Materials (WSS-M99P1
4、111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 23 - 30 g/10 minutes (ISO 1133/ASTM D 1238, 260 C, 2.16 kg) The material shall be dried for 4 h minimum at 130 - 135 C in a mechanical convection oven immediately preceding the test. 3.4.2 Glass Fiber Content 9 - 12% (ISO 3451/2, test temperature 750
5、 +/- 25 C, test portion 2.5 - 3.0 g) 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: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167
6、) 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 SPECIFICATIONWSK-M4D749-A Printed copies are uncontrolled Copyright
7、2010, Ford Global Technologies, LLC Page 2 of 5 3.5.2 Density 1.34 - 1.38 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 70 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) 3.5.4 Flexural Modulus, min 3.5 GPa (ISO 17
8、8/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span, the radius of the loading nose 5.0 +/- 0.1 mm and of the supports 2.0 +/- 0.2 mm) 3.5.5 Shear Modulus at 23 C 1050 - 1420 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of
9、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 vs. Temperature curve shall be plotted for -50 to +220
10、 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 4.0 kJ/m23.5.6.2 At -40 +/-
11、 2 C 3.7 kJ/m2The 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, if not possible, test can be conducted outside, but within 5 s. 3.5.7 Heat Deflection Temperature, min 170 C (IS
12、O 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 1.80 MPa) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D749-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150
13、 +/- 50 air changes/h, 1000 h at 150 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensile Strength Change +/- 15% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 15% (Test Method per para 3.5.6.1, specimens to be
14、notched before heat aging) 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 95 Formation of excessive amounts of clear film or droplets is cause
15、for rejection. 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 5 - 6-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injec
16、tion molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C Flow Direction 0.6 - 0.8% Transverse to Flow 1.2 - 1.4% ENGINEERING MATERIAL SPECIFICATIONWSK-M4D749-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 5.2.2 Post Shrinkage (Separate spe
17、cimens required for each test) . After 48 h at 80 C 0.05% . After 30 min at 120 C 0.1% 5.3 MELT VOLUME RATE 20 - 26 cm3/10 minutes (ISO 1133/ASTM D 1238, 260 C, 2.16 kg) The material shall be dried for min of 4 h at 130 - 135 C in a mechanical convection oven immediately preceding the test. 5.4 HEAT
18、 DEFLECTION TEMPERATURE, min 205 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 0.45 MPa) 5.5 MELT TEMPERATURE 225 C (ISO 1218, Method B/ASTM D 789) 5.6 RECYCLING CODE PBT-GF10 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D749-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
