1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 12 N-STATUS No replacement named J. Crist, NA 2006 01 12 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 & 4 1995 05 05 NB00I10043054424 M. Trapp Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page
2、1 of 5 POLYBUTYLENE TEREPHTHALATE (PBT), IMPACT MODIFIED WSS-M4D749-A2 7% GLASS FIBER FILLED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is an impact modified, 7% glass fiber filled thermoplastic molding compound based on polybutylene terephthal
3、ate. 2. APPLICATION This specification was released originally for material used for a 76/24 way NVH shield. 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-M99P1
4、111-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 4.5 - 17.0 g/10 minutes (ISO 1133, 250 C, 2.16 kg) The material shall be dried for 4 h minimum at 120 C in a mechanical con
5、vection oven immediately preceding the test. (s) 3.4.2 Filler Content 5 - 9% (ISO 3451/2, Method A) 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 re
6、quired: 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 ENGINEERING MATERIAL SPECIFICATIONWSS-M4D749-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 Specimens with shorter dimensions shall be cut from the center porti
7、on of the test specimen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. 3.5.2 Density 1.27 - 1.32 g/cm3(ISO 1183, Method A) (s) 3.5.3 Tensile Strength at Max Load, min 40 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min) (s) 3.5.4 Flexural
8、Modulus, min 2.2 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 0.63 - 1.05 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 t
9、he 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 +200 C temperature range, at 5 C minimum intervals. The plotted curve must be within toler
10、ance 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 +/- 1 C 1.4 kJ/m23.5.6.3 At -20 +/- 2 C 2.8 kJ/m2The test specimens must be conditioned for minimum of 6 h at the
11、 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 110 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection. At 1.80 MPa) All specimens dry as molded. If not tested i
12、mmediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. ENGINEERING MATERIAL SPECIFICATIONWSS-M4D749-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.5.8 Heat Aging Performance (ISO 188, except 150
13、 +/- 50 air changes/h, 1000 h at 140 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 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 Percent Change +/- 25% (Te
14、st Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change +/- 25% (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 heating, 21 C cooling plate) Fog Number, min 90 Formation of clear film, droplets or crystals is cause for reject
15、ion. 3.7 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.5 +/- 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
16、this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 5.7-5/ C (ASTM E 831 (TMA), temperature range -30 - +30 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 0.7% ENGINEERING MATERIAL SPECIFIC
17、ATIONWSS-M4D749-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.15% . After 30 min at 120 C 0.26% 5.3 MELT TEMPERATURE, min 215 C (ISO 3146, Method C, 10 C/min heating
18、 rate) 5.4 HEAT DEFLECTION TEMPERATURE, min 200 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection. At 0.45 MPa) All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. 5.5 RECYCLING CODE PBT-GF07 ENGINEERING MATERIAL SPECIFICATIONWSS-M4D749-A2 Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
