1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 06 11 N-STATUS No replacement named A. Pan, APA 2006 07 18 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10 & 4 1994 12 05 Released NB00I10043054402 M. Masserant Printed copies are uncontrolled Copyright 2010, Ford Global Technologi
2、es, LLC Page 1 of 5 POLYBUTYLENE TEREPHTHALATE (PBT) MOLDING WSB-M4D929-A1 COMPOUND, INTERIOR NOT TO BE USEFD FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic unfilled high temperature molding compound based on polybutylene terephthalate (PBT). 2. APPLICATION Thi
3、s specification was released originally for material used for sun visor elbows. 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-M99P1111-A). 3.1.1 All requirement
4、s 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 13 - 17 g/10 minutes (ISO 1133, 250 C, 2.16 kg) The material shall be dried for 4 h minimum at 125 +/- 2 C or 1 - 1.5 h at 150 +/- 2 C in a mechanical c
5、onvection oven immediately preceding the test. 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 (Tensile Bar
6、, 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 1.30 - 1.34 g/cm (ISO 1183, Method A) ENGINEERING MATERIAL SPECIF
7、ICATIONWSB-M4D929-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 5 (s) 3.5.3 Tensile Strength at Max Load, min 55 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) (s) 3.5.3.1 Elongation at Break, min 10% (Test Method accordin
8、g to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 1.9 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 720 - 1340 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 0.1%. Specimen approx
9、. 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 +200 C temperature range, at 5 C minimum intervals. Th
10、e 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 2.5 kJ/m 3.5.6.2 At -40 +/- 1 C 2.9 kJ/mThe test specimens must be conditioned for minimum of 6 h at
11、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 45 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection. At 1.80 MPa) 3.5.8 Heat Aging Performance (ISO 188, exc
12、ept 150 +/- 50 air changes/h, 1000 h at 125 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D929-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 5 3.5.8.1 Tensile S
13、trength at Max Load Change +/- 25% (Test 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 95 Formation of clear film, dr
14、oplets or crystals 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 tbd +/- 0.1 mm with a smooth surface. 3.8 WEATHERING RESISTANCE After exposure in accordance with 3.8.1 and 3.8.2, the material shall sh
15、ow no fading or color change in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, there shall be no cracking, crazing or other deterioration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by washing w
16、ith mild detergents and water (ratio 5:95 by volume), or equivalent, after the Florida exposure. All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida exposure results for final approval. 3.8.1 Xenon Arc Weatherometer Rating 4 (SAE J1885, 300.8 kJ/m exposure
17、minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.8.2 12 months Florida Rating 4 (FLTM BI 160-01, 5 south, under glass*, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) *PPG Herculite K, tempered safety g
18、lass, 3 mm thick ENGINEERING MATERIAL SPECIFICATIONWSB-M4D929-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 5 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification.
19、 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 10.0-5/ C (ASTM E 831 TMA, temperature range -30 to +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 1.8% 5.2.2 Post Shrinkage (Separate specimens require
20、d for each test) . After 48 h at 80 C 2.2% . After 30 min at 120 C 2.5% 5.3 MELT VOLUME RATE 11 - 15 cm/10 minutes (ISO 1133, 250 C, 2.16 kg, extrudate volume in cm/10 minutes) 5.4 MELT TEMPERATURE, min 221 C (ISO 3146, Method C, 10 C/min heating rate) 5.5 RECYCLING CODE PBT ENGINEERING MATERIAL SPECIFICATIONWSB-M4D929-A1Printed copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 5 of 5
