1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 08 N-STATUS No replacement named J. Crist, NA 2005 09 23 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 1989 04 07 Released SM/EQ15817 TP P. Kuntze Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LL
2、C Page 1 of 4 POLYBUTYLENE TEREPHTHALATE (PBT) WSK-M4D636-A INJECTION MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic polyester injection molding compound based on polybutylene terephthalate (PBT) that has a high viscosity and con
3、tains a demolding agent. 2. APPLICATION This specification was released originally for material used for electrical connector. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppli
4、ers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 12 - 20 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 conve
5、ction oven immediately preceding the test. 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, IS
6、O 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 1.28 - 1.33 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERI
7、NG MATERIAL SPECIFICATIONWSK-M4D636-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 4 3.5.3 Tensile Strength at Max Load, min 52 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% (T
8、est Method according to para 3.5.3) 3.5.4 Flexural Modulus, min 2.0 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 64 mm support span) 3.5.5 Shear Modulus at 23 C 680 - 1020 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain leve
9、l below 1%. Specimen approx. 60 x 10 x 4.0 +/- 0.2 mm cut from the center of specimen A.) Additionally, a Shear Modulus 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
10、 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 for each test) 3.5.6.1 At 23 +/- 2 C 6 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.
11、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 (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
12、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 +/- 20% (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) ENG
13、INEERING MATERIAL SPECIFICATIONWSK-M4D636-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, 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. GENE
14、RAL 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 8.5 - 12-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specime
15、n) 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 1.8 - 2.1% 5.2.2 Post Shrinkage (Separate specimens required 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 11.5 - 19 cm3/ (ISO 1133/ASTM D 12
16、38, 250 C, 10 minutes 2.16 kg, extrudate volume in cm3/10 minutes) The material shall be dried for 4 h minimum at 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-M4D636-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4
