1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 12 14 Re-Activated Move back to active status V. Cerato, FoE 2010 07 14 N-STATUS No replacement A. Pan, APA 1992 09 01 Released EP00E10176304000 P. Kuntze Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page
2、1 of 5 POLYBUTYLENE TEREPHTHALATE (PBT), 15% GLASS WSK-M4D750-A FIBER REINFORCED MOLDING COMPOUND 1. SCOPE The material defined by this specification is a 15% glass fiber reinforced thermoplastic polyester molding compound based on polybutylene terephthalate (PBT). 2. APPLICATION This specification
3、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 For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt
4、Flow Rate 16 - 38 g/ (ISO 1133/ASTM D 1238, 250 C, 2.16 kg) 10 minutes 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 13 - 17% (ISO 3451/2, test temperature 750 +/- 25 C, test portion 2.5 - 3.0 g) 3
5、.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) B. 120 x 10 x 4.0 +/- 0.2 mm Specime
6、ns 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 1.39 - 1.44 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D750-A Printe
7、d copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 3.5.3 Tensile Strength at Max Load, min 85 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 4.1 GPa (ISO 178/ASTM D 790M, Method I, Procedure A,
8、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 1.0 - 1.6 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Spe
9、cimen 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 C temperature range, at 5 C minimum int
10、ervals. 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 4.5 kJ/m23.5.6.2 At -40 +/- 2 C 4.0 kJ/m2The test specimens must be
11、 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 175 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2
12、mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 1.80 MPa) 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 140 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) ENGINEERING MATERIAL SPECIFICATIONWSK-
13、M4D750-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.5.8.1 Tensile Strength Change +/- 50% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change -20% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FLAMMABILITY
14、 (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 for rejection. 5. GENERAL INFORMATION The i
15、nformation given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 4 - 5-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinka
16、ge . After 48 h at 23 +/- 2 C Flow Direction 0.5 - 0.8% Transverse to Flow 1.0 - 1.6% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.05% . After 30 min at 120 C 0.1% ENGINEERING MATERIAL SPECIFICATIONWSK-M4D750-A Printed copies are uncontrolled Copyright 2010
17、, Ford Global Technologies, LLC Page 4 of 5 5.3 MELT VOLUME RATE 13 - 25 cm3/ (ISO 1133/ASTM D 1238, 260 C, 2.16 kg) 10 minutes 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 DEFLECTION TEMPERATURE, min 215 C (ISO 75
18、/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 220 - 225 C (ISO 1218, Method B/ASTM D 789) 5.6 RECYCLING CODE SAE or PBT-GF15 OPTIONAL 6. SUMMARY OF REVISIONS 2009 08 27 3.4.1 from 16-30 g/cm3 to 16-38 3.5.3 from 90MPa to 85 Mpa 3.5.8.1 from +-15% to +-50% PBT-GF15 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D750-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
