1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2004 12 15 Revised Format Updated; Revised Title 3.1 2002 10 14 Activated M. Myers Printed copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 1 of 5 UNSATURATED POLYESTER (UP), IMPACT MODIFIED, 28% GLASS WSS-M3D184-A FI
2、BER REINFORCED SHEET MOLDING COMPOUND 1. SCOPE The material defined by this specification is a toughened and low moisture absorption 25 mm long glass fiber reinforced unsaturated polyester (UP) sheet molding compound. 2. APPLICATION This specification was released originally for material used for ex
3、terior body panels where less “popping“ is desired for better appearance and paintability. 3. REQUIREMENTS 3.1 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
4、requirements 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
5、 same 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 allow
6、ed. 3.2.2 Density 1.88 1.96 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-M3D184-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 2 of 5 3
7、2.3.2 Glass Fiber Content, by Weight 26 - 31% 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 cr
8、ucibles 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 50 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 6 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 116 MPa (ISO 178, 60 x 10 x 2.5 +/- 0.2 mm specimen, 40 mm support span, 2 mm/ minute test speed) 3.2.7 Shear Modulus at 23 C 3.8 - 5.9 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz
10、 +/- 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 +25
11、0 C 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
12、be available on request. (s) 3.2.8 Impact Strength, Izod, min (ISO 180, Method A, 63.5 x 12.7 x 2.5 +/- 0.2 mm specimen use center section of specimen, 10 specimens for each test) 3.2.8.1 At 23 C +/- 2 C 80 KJ/m23.2.8.2 At -40 C +/- 1 C TBD KJ/m2The test specimen must be conditioned for minimum of 6
13、 h at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold chamber, if not possible, test may be conducted outside, but within 5 s. ENGINEERING MATERIAL SPECIFICATIONWSS-M3D184-APrinted copies are uncontrolled Copyright 2004, Ford Global Technol
14、ogies, LLC Page 3 of 5 (s) 3.2.9 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) 3.2.10 Water Absorption, max UP- (GF+M) 70) ENGINEERING MATERIAL SPECIFICATIONWSS-M3D184-APrinted copies are uncontrolled Copyright 2004, Ford Global Technologies, LLC Page 5 of 5
