1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2012 04 30 N Status Replaced by WSS-M4D938-B1 B. Haggart, NA 2006 11 22 Revised Paragraphs 3.6 and 3.8, 3.8.1 Inserted 3.0; 3.8.3; Deleted 3.1, 3.2, 3.3, 3.5.7.3, 3.9, 3.10 Corrected paragraph 5.4.1, 5.4.2 to be 5.3, 5.3.1 & 5.3.2 L. S
2、chmalz 1995 12 19 Activated M. Masserant Copyright 2012, Ford Global Technologies, LLC Page 1 of 5 THERMOPLASTIC POLYOLEFIN ELASTOMER (TEO), COLOR WSS-M4D938-A1 PIGMENTED MOLDING COMPOUND, INTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is thermoplastic pol
3、yolefin elastomer (TEO) injection and/or extrusion molding compound with improved cold temperature impact. 2. APPLICATION This specification was released originally for material used for stepwell scuffplates. 3. REQUIREMENTS Material specification requirements are to be used for initial qualificatio
4、n of materials. 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 repres
5、enting 3 sigma values. 3.4 MOLDING COMPOUND (s) 3.4.1 Melt Flow Rate 7 - 11 g/10 minutes (ISO 1133, 230 C, 2.16 kg) 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 specimens. The following d
6、imensions 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 annealing allowed. 3.5.2 Dens
7、ity 0.89 - 0.92 g/cm3 (ISO 1183, Method A) ENGINEERING MATERIAL SPECIFICATION WSS-M4D938-A1 Copyright 2012, Ford Global Technologies, LLC Page 2 of 5 3.5.3 Hardness, Durometer D 59 - 63 (ISO 868, 15 s dwell) 3.5.4 Tensile Strength at Max Load, min 16 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm
8、 specimen, 50 mm/min test speed 3.5.4.1 Elongation at Yield, min 11% (Test Method according to para 3.5.4) 3.5.5 Flexural Modulus, min 823 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.5.6 Shear Modulus at 23 C 300 - 450 MPa (ASTM D 4065, forced constant
9、 amplitude, 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 versus Temperature cur
10、ve 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. 3.5.7 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.7.1 At 23 +/- 2 C 42.0 kJ/m2 3.5.7.2 A
11、t -40 +/- 2 C 5.0 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, if not possible, test can be conducted outside, but within 5 s. 3.5.8 Heat Deflection Temperature, min
12、 42 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection at 1.80 MPa) ENGINEERING MATERIAL SPECIFICATION WSS-M4D938-A1 Copyright 2012, Ford Global Technologies, LLC Page 3 of 5 3.5.9 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 120 +/- 2
13、 C. Unaged property values shall be determined at the time of the aged properties determination) 3.5.9.1 Tensile Strength at Change +/- 25% (Test Method per para 3.5.4) 3.5.9.2 Impact Strength, Izod Change +/- 25% (Test Method per para 3.5.7.1, specimens to be notched before heat aging) 3.6 FOGGING
14、SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 70 Formation of clear film, droplets or crystals is cause for rejection. 3.7 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x
15、 0.8 +/- 0.1 mm with a smooth surface. 3.8 WEATHERING RESISTANCE After exposure in accordance with 3.8.1, 3.8.2 and 3.8.3 the material shall show on fading or color change in excess of specified Gray Scale rating (AATCC Evaluation Procedure 1/ISO 105-A02). In addition, there shall be no cracking, cr
16、azing or other deterioration. A slight loss of gloss or chalking will be allowed provided an acceptable appearance can be achieved by washing with mild detergents and water (ratio 5:95 by volume), or equivalent, after the Florida exposure. All initial approvals will be based on the preliminary Weath
17、erometer exposure, pending Florida exposure results for final approval-Not required for North America. 3.8.1 Xenon Arc Weatherometer Rating 4 - 5 Required Worldwide except North America (SAE J1885, 1240.8 kJ/m2 exposure min, specimen size: 150 x 100 mm min, 3.2 +/- 0.2 mm thick, molded in smooth pol
18、ished mold) ENGINEERING MATERIAL SPECIFICATION WSS-M4D938-A1 Copyright 2012, Ford Global Technologies, LLC Page 4 of 5 3.8.2 12 months Florida Rating 4 - 5 Not required for North America (FLTM BI 160-01, 5 south, under glass, specimen size: 150 x 100 mm, min, 3.2 +/- 0.2 mm thick, molded in smooth p
19、olished mold) 3.8.3 Filtered Xenon Arc Weatherometer Rating 4 - 5 Required for North America (SAE J1885 modified (FLTM BO 116-01), 2406.4 kJ/m2 exposure min, specimen size: 150 x 100 mm min, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 5. GENERAL INFORMATION The information given below is p
20、rovided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 13E-5/C (ASTM E 831 TMA) 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 +/-
21、2 C 1.45% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 1.5% . After 30 min at 120 C 1.4% 5.3 MULTI AXIAL IMPACT AT MAX LOAD, min (ASTM D 3763, 100 x 100 x 2.5 +/- 0.2 mm edge gated injection molded specimens) Test velocity at initial contact with the test spe
22、cimen shall be 6.7 m/s and must not change by more that 10% during the impact event. Load energy and velocity are to be recorded as a function of displacement. 5.3.1 At 23 C 24 J 5.3.2 At -30 C 8 J 5.4 RECYCLING CODE PP+EPDM ENGINEERING MATERIAL SPECIFICATION WSS-M4D938-A1 Copyright 2012, Ford Global Technologies, LLC Page 5 of 5
