1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Ver. 3 2008 08 20 N-STATUS Replaced by WSK-M4D753-A2 A. Pan, FAPA 2005 12 12 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1993 03 01 Released EP00E10258809000 P. Kuntze Printed copies are uncontrolled Copyright 2008, Ford Global
2、Technologies, LLC Page 1 of 4 POLYBUTYLENE TEREPHTHALATE (PBT), 20% GLASS WSK-M4D727-A FIBER REINFORCED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 20% glass fiber reinforced, thermoplastic polyester molding compound based on polybutylene t
3、erephthalate (PBT). 2. APPLICATION This specification was released originally for material used for painted outside door handle. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production
4、Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Melt Flow Rate 15 - 30 g/10 minutes (ISO 1133/ASTM D 1238, 260 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. 3.4.2 Glass Fiber Content 18 - 22% (ISO 3451/2,
5、 test temperature 750 +/- 25 C, test portion 2.5 - 3.0 g) 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 (
6、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 B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.44 - 1.48 g/cm3 (ISO 1183, Method A/ASTM D 792, Meth
7、od A1) ENGINEERING MATERIAL SPECIFICATION WSK-M4D727-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 2 of 4 3.5.3 Tensile Strength at Max Load, min 105 MPa (ISO R 527/ASTM D 638M, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) 3.5.4 Flexural Modu
8、lus, min 5.5 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 loading nose 5.0 +/- 0.1 mm and of the supports 2.0 +/- 0.2 mm) 3.5.5 Shear Modulus at 23 C 1.1 - 1.7 GPa (ASTM D 4065, forced constant amplitud
9、e, 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. Temperature curve shall be p
10、lotted 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, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 6.5 k
11、J/m2 3.5.6.2 At -40 +/- 2 C 5.0 kJ/m2 The 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 Te
12、mperature, min 190 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 1.82 MPa) 3.5.8 Heat Aging Performance (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1000 h at 170 +/- 2 C. Unaged property values shall be determined at the time of the aged
13、properties determination) 3.5.8.1 Tensile Strength Change -25% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change -20% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSK-M4D727-A Printed copies are uncontrolled Copyright 20
14、08, 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. 3.7 FOGGING (FLTM BO 116-03) Fog Number, min 90 The formation of droplets or coalescence into a
15、 clear film is cause for rejection. 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 THERMAL EXPANSION 2.5 4-5/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x
16、 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C In Flow Direction 0.25 - 0.50% Transverse to Flow Direction 1.20 - 1.60% 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 0.1% 5.3 MELT VOL
17、UME RATE 12 - 26 cm3/ (ISO 1133/ASTM D 1238, 260 C, 2.16 kg) 10 minutes The material shall be dried for min of 4 h at 130 - 135 C in a mechanical convection oven immediately preceding the test. 5.4 HEAT DEFLECTION TEMPERATURE, min 215 C (ISO 75/ASTM D 648, 120 x 10 x 4.0 +/- 0.2 mm specimen. At 0.45 MPa) 5.5 MELT TEMPERATURE 220 - 226 C (ISO 1218, Method B/ASTM D 789) 5.6 RECYCLING CODE PBT-GF20 ENGINEERING MATERIAL SPECIFICATION WSK-M4D727-A Printed copies are uncontrolled Copyright 2008, Ford Global Technologies, LLC Page 4 of 4
