1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2005 10 27 Activated M. Myers Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 1 of 5 UNSATURATED POLYESTER (UP), 30% GLASS FIBER WSS-M3D186-A REINFORCED CONDUCTIVE SHEET MOLDING COMPOUND 1. SCOPE The material
2、 defined by this specification is a 25 mm long glass fiber reinforced and conductive unsaturated polyester (UP) sheet molding compound. 2. APPLICATION This specification was released originally for material used for non class A body components that do not require a conductive primer to achieve paint
3、ability. Notice: This material has not yet been approved for class A components exposed to direct sunlight. 3. REQUIREMENTS 3.1 QUALITY SYSTEM REQUIREMENTS Material suppliers and part producers must conform to the Companys Standard Requirements for Production Materials (WSS-M99P1111-A). 3.1.1 All re
4、quirements of this specification, identified by symbol (s), shall be met with data representing 3 sigma values. 3.2 MOLDED TEST SPECIMEN 3.2.1 Preparation of Test Specimens All test specimens shall be prepared from cross-ply molded plaques or equivalent. The plaques are to be manufactured from the s
5、ame material and under equivalent conditions as production parts. The plaques shall have the following dimensions: 300 x 300 mm, min x 2.5 +/- 0.2 mm Prepared specimens must show no evidence of fiber tear or loose strands protruding from the specimens. No additional annealing of specimens is allowed
6、. 3.2.2 Density 1.79 1.87 g/cm3(ISO 1183, Method A) (s) 3.2.3 Filler Content, by weight, max 3.2.3.1 Ash Content 50% (ISO 3451/1, Method A, 1 h at 650 +/- 25 C) ENGINEERING MATERIAL SPECIFICATIONWSS-M3D186-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 2 of 5 3.
7、2.3.2 Glass Fiber Content, by Weight 27 - 33% Test Method: ISO 3451/1, Method B, 1 h at 650 +/- 25 C, except use 5% by volume hydrochloric acid solution for 15 min. Rinse the glass fibers several times with distilled water before drying in an oven for 2 h at 120 +/- 2 C. After cooling, weigh the cru
8、cibles and calculate the percent glass fibers. 3.2.3.3 Glass Fiber Length, min 25 mm (Optical evaluation method) (s) 3.2.4 Tensile Strength at Break, min 60 MPa (ISO R 527, 150 min x 10 x 2.5 +/- 0.2 mm specimen, 5 mm/min test speed) (s) 3.2.5 Flexural Modulus, min 9 GPa (ISO 178, 60 x 10 x 2.5 +/-
9、0.2 mm specimen, 40 mm support span, 2 mm/ minute test speed) (s) 3.2.6 Flexural Strength, min 140 MPa (ISO 178, 60 x 10 x 2.5 +/- 0.2 mm specimen, 40 mm support span, 2 mm/ minute test speed) (s) 3.2.7 Impact Strength, Izod, min (ISO 180, Method A, 63.5 x 12.7 x 2.5 +/- 0.2 mm specimen use center s
10、ection of specimen, 10 specimens for each test) 3.2.7.1 At 23 C +/- 2 C 52 KJ/m23.2.7.2 At -40 C +/- 1 C 64 KJ/m2The test specimen 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 chamber, if not pos
11、sible, test may be conducted outside, but within 5 s. (s) 3.2.8 Heat Deflection Temperature, min 230 C (ISO 75, 120 x 10 x 2.5 +/- 0.2 mm specimen use center section of specimen. At 1.82 MPa) 3.2.9 Water Absorption, max 1.0% (ISO 62, 10 day exposure, 300 x 300 x 2.5 +/- 0.2 mm specimen) ENGINEERING
12、MATERIAL SPECIFICATIONWSS-M3D186-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 3 of 5 3.2.10 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 160 +/- 2 C. Unaged property values shall be determined at the time of the aged properties d
13、etermination) 3.2.10.1 Tensile Strength at Break Change +/- 10% (Test Method per para 3.4.4) 3.2.10.2 Flexural Strength Change +/- 10% (Test Method per para 3.4.6) 3.2.10.3 Impact Strength, Izod Change +/- 10% (Test Method per para 3.4.8.1, specimens to be notched before heat aging) 3.3 CORE CONDUCT
14、IVITY 210 Volts, max. Lab Panels (FLTM BI 128-01) 1500 Volts, max Parts Set up voltmeter and fixture the probe tip to be at a 45 angle and 25.4 to 50.8 mm from the surface to be measured. Adjust discharge tip on electrostatic gun so it extends 1 to 3 mm past the sides of the tip. Spray into the air
15、for 5 seconds minimum at a distance of 305 mm from the probe. Voltmeter should read 10,000 volts minimum. Place part in fixture or flat panel on grounded table. Make sure part is grounded, remove the probe fixture from the path of the electrostatic spray. Spray the entire part surface from a distanc
16、e of 305 mm for a minimum of 15 seconds. Record the voltage reading 15 seconds from when the spraying is complete. 3.4 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 2.5 +/- 0.2 mm with a smooth surface. 4. GENERAL INFORMATION The
17、 information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 8.03-7/C (ASTM D 696) 4.2 MOLD SHRINKAGE (ISO 2577, approximately 300 x 300 x 2.5 mm +/- 0.2 mm compression molded specimen) 4.2.1 Mold
18、ing Shrinkage . After 48 h at 23 C +/- 2 C +.048 .086% (Growth) ENGINEERING MATERIAL SPECIFICATIONWSS-M3D186-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 4 of 5 4.3 MOLDED TEST SPECIMEN (s) 4.3.1 Tensile Modulus at Break, min 8.9 GPa (ISO R 527, 150 min x 10 x
19、 2.5 +/- 0.2 mm specimen, 5 mm/min test speed) (s) 4.3.2 Tensile Elongation, min 1.9% (ISO R 527, 150 min x 10 x 2.5 +/- 0.2 mm specimen, 5 mm/min test speed) 4.4 RECYCLING CODE UP - (GF+M) 70) 4.5 SHEAR MODULUS AT 23 C 4.0 6.7 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/-
20、 15%, strain level below 1%. Specimen approximately 60 x 10 x 2.5 +/- 0.2 mm cut from the center of the specimen. Specimen length between clamps 35 - 40 mm. Soak time at each temperature interval - 3 minutes min) Additionally, a Shear Modulus vs. Temperature curve shall be plotted for -50 to +250 C
21、temperature range, at 5 C minimum intervals. The plotted curve must be within tolerance range granted on the original material approval and it shall constitute the reference standard for materials supplied to this specification and shall be kept on file at the designated material laboratory and be available on request. ENGINEERING MATERIAL SPECIFICATIONWSS-M3D186-A Printed copies are uncontrolled Copyright 2005, Ford Global Technologies, LLC Page 5 of 5
