1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 07 14 N-STATUS No replacement A. Pan, APA 2006 02 24 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1990 12 03 Released EP00E01031542000 P. Kuntze Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Pa
2、ge 1 of 5 POLYBUTYLENE TEREPHTHALATE + POLYCARBONATE WSK-M4D789-A BLEND (PBT+PC), 20% GLASS FIBER REINFORCED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 20% glass fiber reinforced blend of polybutylene terephthalate and polycarbonate (PBT+P
3、C), with reduced warpage characteristics. 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 must conform to the Companys Standard Requirements
4、 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 (ISO 1133, 250 C) 3.4.1.1 At 2.16 kg 10 - 15 g/10 minutes 3.4.1.2 At 5.0 kg, min 40 g/1
5、0 minutes The material shall be dried for min of 2 h at 125 in a mechanical convection oven immediately preceding the test. 3.4.2 Glass Fiber Content 18 - 22% (ISO 3451/2, at 750 +/- 25 C, test portion 2.5 - 3.0 g) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specifi
6、ed all tests shall be carried out on injection molded one-end gated test specimens. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D789-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tensil
7、e 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. 3.5.2 Density 1.35 - 1.41 g/cm3(ISO 1183, Method A) (s) 3.5.3 Tensile Stre
8、ngth at Max Load, min 95 MPa (ISO R 527, 150 x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) (s) 3.5.4 Flexural Modulus, min 4.5 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 1.15 - 1.70 GPa (ASTM D 4065, forced constant
9、 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 each temperature interval - 3 minutes minimum). Additionally, a Shear Modulus versus Temperature curv
10、e shall be plotted for -50 to +225 C temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. (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 5.5 kJ/m23.5.6.2
11、At -40 +/- 2 C 4.0 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. (s) 3.5.7 Heat Deflection Temperature, min 115 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/-
12、 0.01 mm deflection. At 1.80 MPa) 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 150 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D789-A Printed copies are uncontrolled
13、 Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.5.8.1 Tensile Strength at Max Load Change +/- 20% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 30% (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
14、) Fog Number, min 95 Formation of clear film or droplets 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 1.0 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provid
15、ed for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 2.7-5/ C (ASTM E 228 or TMA, temperature range -20 to +100 C) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding S
16、hrinkage . After 48 h at 23 +/- 2 C Flow Direction 0.3 - 0.6% Transverse to Flow 0.3 - 0.6% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.1% . After 30 minutes at 120 C 0.1% ENGINEERING MATERIAL SPECIFICATIONWSK-M4D789-A Printed copies are uncontrolled Copyr
17、ight 2010, Ford Global Technologies, LLC Page 4 of 5 5.3 MELT VOLUME RATE (ISO 1133, 250 C) 5.3.1 At 2.16 kg 8 - 13 cm3/10 minutes 5.3.2 At 5.0 kg, min 32 cm3/10 minutes The material shall be dried for min of 2 h at 125 C in a mechanical convection oven immediately preceding the test. 5.4 HEAT DEFLE
18、CTION TEMPERATURE, min 165 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection. At 0.45 MPa) 5.5 MELT TEMPERATURE, min 217 C(ISO 3146, Method C, 10 C/min heating rate) 5.6 RECYCLING CODE PBT+PC-GF20 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D789-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
