1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 08 N-STATUS No replacement named J. Crist, NA 2005 09 14 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 1989 05 17 Released CDS1-PR907166-1 M.A. Myers Printed copies are uncontrolled Copyright 2010, Ford Global Technologies,
2、 LLC Page 1 of 4 POLYBUTYLENE TEREPHTHALATE (PBT), IMPACT WSB-M4D624-A MODIFIED MOLDING COMPOUND, 30% MINERAL/GLASS FIBER REINFORCED NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an impact modified 30% mineral/glass fiber reinforced thermoplastic polyester mold
3、ing compound based on polybutylene terephthalate (PBT). 2. APPLICATION This specification was released originally for material used for exterior painted grilles. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Stan
4、dard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 8 - 22 g/10 minutes (ISO 1133/ASTM D 1248, 250 C, 2.16 kg) 3.4.2 Filler Content 28 - 33% (ISO 3451/2, 1 h at 650 +/- 25 C) 3.5 MOLDED TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherw
5、ise 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 the te
6、st specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.45 - 1.55 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D624-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC P
7、age 2 of 4 3.5.3 Tensile Strength at Max Load, min 75 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 3.5.4 Flexural Modulus, min 5.8 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 a
8、t 23 C 1.53 - 2.55 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. Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +180 C temperature rang
9、e, at 5 C minimum intervals. 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, 63.5 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 3.9 kJ/m23.5.6.2 At -40 +/- 2 C 1.4 kJ/m23.5
10、.6.3 At -20 +/- 2 C 2.5 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. 3.5.7 Heat Deflection Temperature
11、, min 103 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, 1.82 MPa) 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) 3.5.8.1 Tensile Strength Change +/- 15% (Test Method per
12、 para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 15% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D624-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 4 3.6 FLAMMABILITY (ISO 3795) Bur
13、n Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 2.5 +/- 0.1 mm with a smooth surface. 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR
14、 THERMAL EXPANSION 2.6-5/ 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 0.5 - 0.6% 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 0.06% 5.3 HEAT DEFLECTION TEMPERATURE 168 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.45 MPa) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D624-A Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4
