1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 09 27 Re-Activated M. Gramlich, NA 2010 07 14 N-STATUS No replacement A. Pan, APA 1989 03 01 SM/EQ2762 TP P. Kuntze Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 1 of 4 POLYBUTYLENE TEREPHTHALATE (PBT)
2、 WSK-M4D639-A EXTRUSION MOLDING COMPOUND 1. SCOPE The material defined by this specification is a thermoplastic polyester extrusion molding compound based on polybutylene terephthalate (PBT) that has a high viscosity. 2. APPLICATION This specification was released originally for material used for th
3、rottle cable. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-
4、A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 7.5 - 16 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. 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless o
5、therwise 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 Specimens with shorter dimensions shall be cut from the center portion of t
6、he test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.28-1.33 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D639-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LL
7、C Page 2 of 4 3.5.3 Tensile Strength at Max Load, min 50 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed 3.5.3.1 Elongation at Break, min 100% (Test Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 1.85 GPa (ISO 178/ASTM D 790M, Method I, Procedure
8、 A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 700 - 1050 MPa (ASTM D 4065, 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.) Additionally, a Shear M
9、odulus vs. Temperature 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 4. 3.5.6 Impact Strength, Izod, min (ISO 180, Method A/ASTM D 256, Method A, 63.5 x 10 x 4.0 +/-0.2 mm specimen, 10 specimens fo
10、r each test) 3.5.6.1 At 23 +/- 2 C 5 kJ/m23.5.6.2 At -40 +/- 2 C 4 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 wi
11、thin 5 s. 3.5.7 Heat Deflection Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 3.5.7.1 At 1.82 MPa 55 C 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 1000 h at 120 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.
12、8.1 Tensile Strength Change +/- 25% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 35% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D639-A Printed copies are uncontrolled Copyright 2010, Ford Global Technolog
13、ies, LLC Page 3 of 4 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. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requireme
14、nts of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 7.5 - 13-5/ 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 Shrinkage After 48 h at 23 +/- 2 C 1.6 - 2.3% 5.2.2 Post Shrinkage (Separate specimens required
15、for each test) After 48 h at 80 C 0.1% After 30 min at 120 C 0.35% 5.3 MELT TEMPERATURE 222 - 225 C (ISO 1218, Method B/ASTM D 789) 5.4 MELT VOLUME RATE 7.5 - 16 cm3/ (ISO 1133/ASTM D 1238, 250 C, 10 minutes 2.16 kg, extrudate volume in cm3/10 minutes) The material shall be dried for 4 h minimum at
16、130 - 135 C in a mechanical convection oven immediately preceding the test. 5.5 Heat Deflection Temperature, min (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen) 5.5.1 At 0.45 MPa 135 C ENGINEERING MATERIAL SPECIFICATIONWSK-M4D639-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4
