1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 12 N-STATUS No replacement named J. Crist, NA 2006 01 17 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1990 12 03 Released EP00E01031542000 P. Kuntze Printed copies are uncontrolled Copyright 2010, Ford Global Technologies,
2、 LLC Page 1 of 5 POLYBUTYLENE TEREPHTHALATE (PBT), MODIFIED WSK-M4D753-A2 20% GLASS FIBER REINFORCED MOLDING COMPOUND PAINTABLE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a 20% glass fiber reinforced modified thermoplastic polyester molding compound based on
3、 polybuthylene terephthalate (PBT). 2. APPLICATION This specification was released originally for material used for painted outside doorhandle. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements
4、For Production Materials (WSS-M99P1111-A). 3.1.1 All requirements of this specification, identified by symbol (s), shall be met with data representing 3 sigma values. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 15 - 30 g/10 minutes (ISO 1133, 250 C, 2.16 kg) The material shall be dried for min of
5、4 h at 130 - 135 C in a mechanical convection oven immediately preceding the test. 3.4.2 Glass Fiber Content 18 - 22% (ISO 3451/2, at 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 inje
6、ction 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 B. The specimens shall be prepa
7、red according to ISO 294. No annealing allowed. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D753-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 3.5.2 Density 1.42 - 1.48 g/cm3(ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Max Load, min 103 MPa (ISO R 527
8、 150 x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/minute test speed) (s) 3.5.4 Flexural Modulus, min 5.0 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 1.3 - 1.9 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 1
9、5%, 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 versus Temperature curve shall be plotted for -50 to +220 C temp
10、erature range, at 5 C minimum intervals. The plotted curve must be within tolerance range shown on page 5. (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 5.5 kJ/m23.5.6.2 At -40 +/- 2 C 3.0 kJ/m2The test specimen
11、s 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. (s) 3.5.7 Heat Deflection Temperature, min 185 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection. At 1.80 MPa) 3.5.9 H
12、eat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 170 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Max Load Change -25% (Test Method per para 3.5.3) ENGINEERING MATERIAL SPECIFICATIONWSK-M4D
13、753-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.5.9.2 Impact Strength, Izod Change -20% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 FOGGING (FLTM BO 116-03, 3 h at 100 C) Fog Number, min 95 Formation of clear film o
14、r droplets 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
15、 the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 2.5 4-5/C (ASTM E 228 or TMA, temperature range -20 to +100 C) 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 Flow Dire
16、ction 0.25 - 0.50% Transverse to Flow 1.30 - 1.60% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.05% . After 30 minutes at 120 C 0.1% 5.3 MELT VOLUME RATE 13 - 26 cm3/ (ISO 1133, 250 C, 2.16 kg) 10 minutes The material shall be dried for min of 4 h at 130 C
17、 135 in a mechanical convection oven immediately preceding the test. ENGINEERING MATERIAL SPECIFICATIONWSK-M4D753-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 5.4 HEAT DEFLECTION TEMPERATURE, min 210 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection. At 0.45 MPa) 5.5 MELT TEMPERATURE, min 220 - 226 C (ISO 1218, Method B) 5.6 RECYCLING CODE PBT-GF20 ENGINEERING MATERIAL SPECIFICATIONWSK-M4D753-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
