1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 19 N-STATUS No replacement named J. Crist, NA 2006 04 13 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1992 03 02 Released EP00E10176262000 P. Kuntze Printed copies are uncontrolled Copyright 2010 Ford Global Technologies,
2、LLC Page 1 of 4 POLYBUTYLENE TEREPHTHALATE (PBT) 20% GLASS WSK-M4D837-A SPHERE FILLED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic polyester molding compound based on polybutylene terephthalate (PBT) filled with 20% glass spher
3、es. 2. APPLICATION This specification was released originally for material used for instrument cluster bobbins. 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-M9
4、9P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 21 - 29 g/ (ISO 1133/ASTM D 1238, 260 C, 2.16 kg) 10 minutes 3.4.2 Glass Sphere Content 19 - 21% (ISO 3451/2, at 750 +/- 50 C, test portion 2.5 - 3.0 g) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all te
5、sts 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 the test specimen A and/or
6、 B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.43 - 1.47 g/cm (ISO 1183, Method A/ASTM D 792, Method A1) 3.5.3 Tensile Strength at Max Load, min 40 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) ENGINEERING MA
7、TERIAL SPECIFICATIONWSK-M4D837-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 4 3.5.4 Flexural Modulus, min 3.2 GPa (ISO 178/ASTM D 790M, Method I, Procedure A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span, the radius of the lo
8、ading 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 - 1.5 GPa (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. Specimen length betwee
9、n 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 intervals. The plotted curve must be within tolerance range shown on page 4. 3.5.6 Impact Strength,
10、 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 2.0 kJ/m 3.5.6.2 At -40 +/- 2 C 2.0 kJ/m The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Low tem
11、perature 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 60 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 1.80 MPa) 3.5.8 Heat Aging Performanc
12、e (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) 3.5.8.1 Tensile Strength at Max Load Change +/- 15% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 15% (Test Met
13、hod per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D837-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 4 3.6 FOGGING (FLTM BO 116-03) Fog Number, min 95 Formation of excessive amounts of clear film or dr
14、oplets 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 provided for clarification and assistance in meeting the
15、 requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 8 - 12-5/ 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 1.7 - 2.0% 5.2.2 Post Shrinkage (Separate specimens
16、 required for each test) . After 48 h at 80 C 0.1% . After 30 min at 120 C 0.2 - 0.3% 5.3 MELT VOLUME RATE 17 - 24 cm/ (ISO 1133/ASTM D 1238, 260 C, 2.16 kg) 10 minutes 5.4 MELT TEMPERATURE 221 - 224 C (ISO 1218, Method B/ASTM D 789, or ASTM E 794) 5.5 HEAT DEFLECTION TEMPERATURE 165 C (ISO 75/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) 5.6 RECYCLING CODE SAE or PBT-GB20 OPTIONAL PBT-GB20 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D837-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4
