1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 09 28 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.9, 3.10, 4 1992 12 01 Revised EP00E10258833000 Revised 3.5.3 L. Rodigas 1993 09 01 Released EP00E10258825000 L. Rodigas Printed copies are uncontrolled Copyright 2006, Ford Global Tech
2、nologies, LLC Page 1 of 5 MODIFIED POLYPROPYLENE (PP), EPDM MODIFIED WSK-M98D25-A2 SHEET 25% WOOD FLOUR FILLED, VIRGIN AND/OR RECYCLED POLYMER MATRIX 1. SCOPE The material defined by this specification is an extruded sheet of EPDM rubber modified polypropylene filled with 25% wood flour. The polymer
3、 matrix may be based on virgin material and/or up to 100% recyclate, providing the physical properties including statistical process control data of virgin composite can be meet. 2. APPLICATION This specification was released originally for material used for shields - lower back panel to bumper. 3.
4、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 requirements of this specification, identified by symbol (s), shall be met with data represent
5、ing 3 sigma values. 3.4 EXTRUDED SHEETS (s) 3.4.1 Filler Content 23 - 27% (Wood flour and nonextractable residue) Test Method: FLTM AP 150-04 para 1 through 9 of procedure, except: use fritted glass filters solvent - 150 mL xylene duration of extraction - 24 h wash solvent for insoluble residue - 15
6、0 mL acetone drying period - 4 h at 100 +/- 2 C cooling period - 15 minutes in desiccator. Calculation: % Nonextractables = Weight Residue x 100 /Weight Sample 3.4.2 Water Absorption, max 1.5% (ISO 62, Method 1, except result shall be expressed as percentage) ENGINEERING MATERIAL SPECIFICATION WSK-M
7、98D25-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 5 3.5 TEST SPECIMEN 3.5.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on test specimens machined from extruded sheets. The following dimensions are required: A
8、. 150 min x 10 x 2.4 +/- 0.2 mm (Tensile Bar) B. 120 x 10 x 2.4 +/- 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 machined according to ISO 2818. No annealing allowed. 3.5.2 Density 0.95 - 1.05 g/cm3 (ISO 1183, M
9、ethod A) (s) 3.5.3 Tensile Strength at Max Load, min (ISO R 527, 150 min x 10 x 2.4 +/- 0.2 mm specimen, 5 mm/minute test speed) Extrusion Direction (ED) 18 MPa Across Extrusion Direction (AED) 17 MPa (s) 3.5.4 Flexural Modulus, min (ISO 178, 80 x 10 x 2.4 +/- 0.2 mm specimen, 2 mm/min test speed, 6
10、4 mm support span) ED 2.0 GPa AED 1.8 GPa 3.5.5 Shear Modulus at 23 C 570 - 960 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specimen approx. 60 x 10 x 2.4 +/- 0.2 mm cut from the center of specimen A. Specimen length between clamps 35-40 mm. S
11、oak time at each temperature interval - 3 minutes minimum). Additionally, a Shear Modulus versus Temperature curve shall be plotted for -50 to +150 C temperature 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 (I
12、SO 180/1A, 80 x 10 x 2.4 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C ED 4.7 kJ/m2 AED 4.0 kJ/m2 ENGINEERING MATERIAL SPECIFICATION WSK-M98D25-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 3 of 5 3.5.6.2 At -40 +/- 1 C ED 3.5 kJ/m2 AE
13、D 3.2 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. (s) 3.5.7 Heat Deflection Temperature, min (ISO 75, 120 x 10 x 2.4 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflectio
14、n, at 1.80 MPa) ED 74 C AED 60 C 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 100 +/- 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 Change (ED and AED) +/- 25% (Test Method p
15、er para 3.5.3) 3.7 FOGGING (FLTM BO 116-03, 3 h at 100 C) Fog Number, min 85 Formation of clear film or droplets is cause for rejection. 3.8 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 2.4 +/- 0.1 mm with a smooth surface. 5. G
16、ENERAL 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 5-5/ C (ASTM E 228 or TMA, temperature range 20 - 100 C) ENGINEERING MATERIAL SPECIFICATION WSK-M98D25-A2 Printed
17、 copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 4 of 5 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 2.4 +/- 0.2 mm extruded specimen) 5.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 1 - 2% (ED and AED) 5.2.2 Post Shrinkage (Separate specimens required for each test)
18、 After 48 h at 80 C 0.2 - 0.4% (ED and AED) After 30 minutes at 120 C 0.2 - 0.5% (ED and AED) 5.3 ODOR, max Rating 2 (FLTM BO 131-01/SAE J1351) 5.4 RECYCLING CODE PP+EPDM-WD25 ENGINEERING MATERIAL SPECIFICATION WSK-M98D25-A2 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5
