1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2010 01 25 N-STATUS No replacement named J. Crist, NA 2006 05 22 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8, 3.9 Corrected numbering 5 1993 01 05 Released NB0010043054218 E.P. Francis Printed copies are uncontrolled Copyright 2010, Ford
2、Global Technologies, LLC Page 1 of 4 POLYETHYLENE TEREPHTHALATE (PET), 37% GLASS WSB-M4D868-A FIBER REINFORCED MOLDING COMPOUND, PAINTABLE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a toughened thermoplastic polyester molding compound based on polyethylene t
3、erephthalates (PET) reinforced with glass fibers. 2. APPLICATION This specification was released originally for material used for luggage rack slats. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Require
4、ments For Production Materials (WSS-M99P1111-A). 3.4 MOLDING COMPOUND 3.4.1 Glass Fiber Content 33 - 42% (ISO 3451/2, 1 h at 650 +/- 25 C) 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 spe
5、cimens. 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 prepared according to ISO 294. No anneal
6、ing allowed. 3.5.2 Density 1.5 - 1.7 g/cm (ISO 1183, Method A) 3.5.3 Tensile Strength at Max Load, min 92 MPa (ISO R 527, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 5 mm/min test speed) 3.5.4 Flexural Modulus, min 7.3 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support s
7、pan, the radius of the loading nose 5.0 +/- 0.1 mm and of the supports 2.0 +/- 0.2 mm) ENGINEERING MATERIAL SPECIFICATIONWSB-M4D868-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 2 of 4 3.5.5 Shear Modulus at 23 C 1.49 - 2.236 GPa (ASTM D 4065, forced constant am
8、plitude, 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
9、 be plotted for -50 to +250 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, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 4.4 kJ/m 3.5.6.2 At -
10、40 +/- 2 C 5.1 kJ/m 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 Temperature, min 196
11、 C (ISO 75, 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, 150 +/- 50 air changes/h, 1000 h at 180 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.8.1 Tensil
12、e Strength Break 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 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x
13、 1.2 +/- 0.1 mm with a smooth surface. Note: The originator will define the lowest specimen thickness at which the requirement is met. ENGINEERING MATERIAL SPECIFICATIONWSB-M4D868-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 3 of 4 3.7 FOGGING (FLTM BO 116-03,
14、3 h at 100 C) Fog Number, min 80 Formation of clear film or droplets 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 (ASTM D 696) Flo
15、w Direction 3-5/ C Transverse to Flow 7-5/ 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 0.4% 5.3 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.05% . After 30 minute
16、s at 120 C 0.05% 5.4 HEAT DEFLECTION TEMPERATURE 242 C (ISO 75, 120 X 10 X 4.0 +/- 0.2 mm specimen, at standard deflection of 0.32 +/- 0.01 mm. At 0.45 MPa) 5.5 MELT TEMPERATURE 254 C (ISO 3146, Method C, 10 C/min heating rate) 5.6 MELT RATE 2.5 - 7.6 cm/ (ISO 1133, 280 C, 2.16 kg) 10 minutes 5.6.1
17、Flow 2 - 6 g/10 minutes 5.6.2 Volume 2.5 - 7.6 cm/ 10 minutes The material shall be dried for 12 minutes minimum at 210 C in a mechanical convection oven immediately preceding the test. 5.7 RECYCLING CODE PET-GF37 ENGINEERING MATERIAL SPECIFICATIONWSB-M4D868-APrinted copies are uncontrolled Copyright 2010, Ford Global Technologies, LLC Page 4 of 4
