1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 08 N-STATUS No replacement named J. Crist, NA 2005 10 27 Revised Inserted 3.0; deleted 3.1, 3.2, 3.3, 3.9, 3.10 revised 3812and382 L Rodigas1988 07 14 Released SM/EQ5376 TP P. Kuntze Printed copies are uncontrolled Copyright 2010, Ford
2、 Global Technologies, LLC Page 1 of 5 POLYBUTYLENE TEREPHTHALATE (PBT) 33% GLASS FIBER WSK-M4D608-A REINFORCED IMPACT MODIFIED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 33% glass fiber reinforced and impact modified thermoplastic polyeste
3、r molding compound based on polybutylene terephthalate (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 must conform to the Companys S
4、tandard 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 6.5 - 12.5 g/10 minutes (ISO 1133, 250 C, 2.16 kg) The material sh
5、all be dried for 4 h minimum at 130 - 135 C in a mechanical convection oven immediately preceding the test. (s) 3.4.2 Glass Fiber Content 31 - 35% (ISO 3451/2, test temperature 650 +/- 25 C, test portion 2.5 - 3.0 g) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise speci
6、fied all tests shall be carried out on injection molded one-end gated test specimens. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D608-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 5 The following dimensions are required: A. 150 min x 10 x 4.0 +/- 0.2 mm (Tens
7、ile 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 1.50 - 1.56 g/cm3(ISO 1183, Method A) (s) 3.5.3 Tensile St
8、rength at Max Load, min 103 MPa (ISO R 527, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) (s) 3.5.4 Flexural Modulus, min 6.0 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/minute test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 1.55 - 2.10 GPa (ASTM D 4065, force
9、d 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 each temperature interval: 3 minutes minimum) Additionally, a Shear Modulus vs. Temperatur
10、e curve shall be plotted for -50 to +220 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 (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, min 7.0 kJ/m23.
11、5.6.2 At -40 +/- 2 C, min 4.5 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. ENGINEERING MATERIAL SPECIF
12、ICATIONWSK-M4D608-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 5 (s) 3.5.7 Heat Deflection Temperature, min 194 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection, at 1.80 MPa) 3.5.8 Heat Aging Performance (ISO 188, 150 +/- 50 air
13、changes/h, 1000 h at 120 +/- 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 +/- 25% (Test Method per para 3.5.6.1, specimens to be notched befo
14、re heat ageing) 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C) Fog Number, min 90 Formation of a clear film, droplets or crystals 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
15、surface. 3.8 ELECTRICAL PROPERTIES 3.8.1 Dielectric Strength (IEC 243/ASTM D 149, in insulating oil/liquid, 3.2 +/- 0.2 mm thick specimen) 3.8.1.1 Short Time, min 16 kV/mm 3.8.1.2 Step by Step 14 kV/mm (5 - 10 kV starting voltage, 20 s steps) 3.8.2 Electrical Resistivity 1.E +15 Ohm-cm (IEC 93/ASTM
16、D 257) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D608-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 5 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFF
17、ICIENT OF LINEAR THERMAL EXPANSION 2 - 3-5/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 Shrinkage . After 48 h at 23 +/- 2 C 0.3 - 0.7% 5.2.2 Post Shrinkage (Separate specimens required
18、for each test) . After 48 h at 80 C 0.1% . After 30 minutes at 120 C 0.1% 5.3 MELTING POINT 224 C (ISO 1218, Method B) 5.4 MELT VOLUME RATE 4 - 9 cm3/10 minutes (ISO 1133, 250 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. 5.5 RECYCLING CODE PBT-GF33 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D608-A Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 5 of 5
