1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2016 08 31 N Status No usage or replacement L. Sinclair, NA 2004 10 19 Activated V. Cerato Copyright 2016, Ford Global Technologies, LLC Page 1 of 4 THERMOPLASTIC ELASTOMER, POLYPROPYLENE, SBR/NR (50% WSS-M2D476-A8 TYRE CRUMB) 81 DUROMETER A
2、HARDNESS, EXTERIOR APPLICATIONS. 65% POST CONSUMER RECYCLATE THERMOPLASTIC ELASTOMER, POLYPROPYLENE, SBR/NR (37% WSS-M2D476-A9 TYRE CRUMB) 94 DUROMETER A HARDNESS, EXTERIOR APPLICATIONS. 70% POST CONSUMER RECYCLATE THERMOPLASTIC ELASTOMER, POLYPROPYLENE, SBR/NR (25% WSS-M2D476-A10 TYRE CRUMB) 50 DUR
3、OMETER D HARDNESS, EXTERIOR APPLICATIONS. 80% POST CONSUMER RECYCLATE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by these specifications are U.V. stabilized thermoplastic elastomers based on a post-consumer grade of polypropylene and Styrene-Butadiene/Natural Rubber from tyre crumb
4、 The materials can be processed by conventional thermoplastic molding techniques such as injection and/or extrusion molding. 2. APPLICATION These specifications were released originally for material used for exterior moldings and extrusions such as mud flaps and wheel arch liners. 3. REQUIREMENTS 3
5、1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.2 DYNAMIC MECHANICAL ANALYSIS (ASTM D 4065) Ford Motor Company, at its option, may establish shear modulus/damping v
6、s. temperature curves plotted for -50 to +170 C temperature range for material/parts supplied to these specifications. The shear modulus and damping curves established for initial approval shall constitute the reference standard and shall be kept on file at the designated material laboratory. All sa
7、mples shall produce shear modulus and damping curves that correspond to the reference standard when tested under the same conditions. ENGINEERING MATERIAL SPECIFICATION WSS-M2D476-A8/A10 Copyright 2016, Ford Global Technologies, LLC Page 2 of 4 3.3 PREPARATION OF TEST SPECIMENS (ISO 294) Unless othe
8、rwise specified, all test shall be conducted on specimens die cut from injection molded plaques 150 x 100 x 2.0 +/- 0.2 mm. The plaques shall be molded according to ISO 294 and film gated along the upper 100 mm edge, and preceded by a 0.8 mm diameter pin gate. No annealing allowed, unless specified
9、otherwise. 3.4 FINISHED PART REQUIREMENTS The finished part must conform with the requirements of the relevant System Design Specifications (SDS). 3.5 ORIGINAL PROPERTIES A8 A9 A10 3.5.1 Density, +/- 0.05 g/cm3 (ISO 1183, Method A) SG: 1.12 1.06 1.00 3.5.2 Hardness, Durometer A Shore A: 80 94 - (AST
10、M D 2240, Shore D: - 40 50 10 second dwell) 3.5.3 Tensile Strength, MPa, min (ISO 37, test speed: 508 mm/min) I. Parallel to Flow 6.00 9.50 14.00 II. Perpendicular to Flow 4.50 6.50 11.00 3.5.3.1 Elongation at Break, min (Test method according to para 3.5.3) I. Parallel to Flow 120% 50% 20% II. Perp
11、endicular to Flow 220% 70% 20% 3.5.3.2 Modulus at 100% Elongation, MPa, min (Test method according to para 3.5.3) I. Parallel to Flow 6.00 - - II. Perpendicular to Flow 3.50 - - 3.5.4 Tear Strength, min (ISO 34, Method B Procedure a) 3.5.4.1 Parallel to Flow, kN/m 40 70 85 3.5.4.2 Perpendicular to F
12、low, kN/m 30 50 75 ENGINEERING MATERIAL SPECIFICATION WSS-M2D476-A8/A10 Copyright 2016, Ford Global Technologies, LLC Page 3 of 4 A8 A9 A10 3.5.5 Brittleness Point, max C (ISO 812, Type B specimen/ ASTM D 2137, Method A) -45 -20 n/a 3.5.6 Ozone Resistance, max Rating 0 (FLTM BP 101-01, Procedure A)
13、3.5.7 Compression Set, max 65% 75% 80% (ISO 815, plied-up specimens, 22 h at 70 +/- 2 C) 3.5.8 Migration Staining, Rating 4 - 5 (FLTM BP 153-01, ISO 105-A02/ AATCC Evaluation Procedure 2) 3.6 HEAT AGING (ISO 188, 150 +/- 50 air change/h, 1000 h at 70 +/- 2 C) 3.6.1 Hardness Change +/- 0 -2 +3 3.6.2
14、Tensile Strength Change, max % -3 -4 +14 3.6.3 Elongation Change, max % -25 -59 -23 3.6.4 Visual Evaluation No surface tackiness or cracks when folded flat against self. 3.7 FLAMMABILITY (ISO 3795) Burn Rate (mm/minute) (RES.30.MS.302) 18 36 34 3.8 WEATHERING RESISTANCE After exposure in accordance
15、with 3.8.1, 3.8.2 and 3.8.3 the material shall show no 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
16、appearance can be achieved by washing and/or polishing with Ford car polish (auto wax) after the outdoor exposure, by permission of the affected Product Development Materials Activity. All initial approval will be based on the preliminary Weatherometer exposure, pending Florida and Arizona exposure
17、results for final approval. ENGINEERING MATERIAL SPECIFICATION WSS-M2D476-A8/A10 Copyright 2016, Ford Global Technologies, LLC Page 4 of 4 3.8.1 Xenon Arc Weatherometer Exterior Rating 4 (SAE J1960, 2500 kJ/m2 exposure minimum, specimen size: 60 x 60 minimum x 2.0 +/- 0.1 mm thick, smooth surface, l
18、ow gloss injection molded specimen) 3.8.2 Weathering Rating 4 12 months Florida 12 months Arizona Exterior (SAE J1976, 5 south, direct weathering inland, specimen size: 60 x 60 minimum x 2.0 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 3.8.3 Weathering Rating 4 24 months Fl
19、orida 24 months Arizona Exterior (SAE J1976, 5 south, direct weathering inland, specimen size: 60 x 60 minimum x 2.0 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of these specifications. 4.1 RECYCLING CODE PP+SBR/NR
