1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 03 2011 09 08 N Status Replace A3 with WSS-M4D873-B3 and A4 with WSS-M4D873-B4 M. Corley, FoE 2006 12 20 Revised Changed from N-Status to Active Ludwig Rodigas 2002 07 16 Activated L. Rodigas Controlled document at www.MATS Copyright 2011
2、, Ford Global Technologies, LLC Page 1 of 5 THERMOPLASTIC POLYOLEFIN ELASTOMER (TEO) WSS-M4D873-A3 20% MINERAL FILLED, LOW THERMAL EXPANSION, HIGH IMPACT MOLDING COMPOUND, EXTERIOR THERMOPLASTIC POLYOLEFIN ELASTOMER (TEO) WSS-M4D873-A4 20% MINERAL FILLED, LOW THERMAL EXPANSION, HIGH IMPACT MOLDING C
3、OMPOUND, PAINTABLE NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by these specifications are 20% mineral filled high impact and very low thermal expansion thermoplastic polyolefin elastomer (TEO) injection molding compounds based on in-reactor alloyed polypropylene copolymers and rubb
4、er, color pigmented and added UV stabilization for exterior use (WSS-M4D873-A3) or suitable for painting, providing that suitable surface pretreatment is used (WSS-M4D873-A4). 2. APPLICATION These specifications were released originally for material used for bumper shells or other parts of bumper sy
5、stem, pigmented and/or painted. 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 requirements of this specification, identified by symbol (s
6、), shall be met with data representing 3 sigma values. 3.2 MOLDING COMPOUND (s) 3.2.1 Melt Flow Rate, 13 - 20 g/10 minute (ISO 1133, 230 C, 2.16 kg) (s) 3.2.2 Filler Content 18 - 23% (ISO 3451/1, Method A, talc filler, 30 minutes at 850 +/- 50 C test portion 1 to 2 g) ENGINEERING MATERIAL SPECIFICAT
7、ION WSS-M4D873-A3/A4 Copyright 2011, Ford Global Technologies, LLC Page 2 of 5 3.3 MOLDED TEST SPECIMEN 3.3.1 Preparation of Test Specimens Unless otherwise specified all tests shall be carried out on injection molded one end gated test specimens. The following dimensions are required: A. 150 min x
8、10 x 4.0 +/- 0.2 mm (ISO 3167, Type 1A) B. Approximately 200 x 100 x 2.5 +/- 0.1 mm (molding according ISO/DIS 294-3) 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 294-1. No annealing allowed.
9、3.3.2 Density 0.97 - 1.05 g/cm3 (ISO 1183, Method A) 3.3.3 Hardness, Durometer D 52 - 58 ISO 868, 15 s dwell) (s) 3.3.4 Tensile Strength at Yield, min 15 MPa (ISO 527, 1 & ISO 527-2, 150 min x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/ minute test speed) (s) 3.3.5 Flexural Modulus, min 1.4 GPa (ISO 178, M
10、ethod A, 80 x 10 x 4. 0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.3.6 Shear Modulus at 23 C 450 - 750 MPa (ASTM D 5279, forced constant amplitude, fixed frequency of 1 HZ +/- 15%, strain level below 1%. Specimens approximately 60 x 10 x 4.0 +/ 0.2mm cut from the center of speci
11、men A. Specimen length between clamps 35 - 40 mm. Soak time at each temperature interval - 3 minutes min) Additionally, a shear modulus versus temperature curve shall be plotted for -50 to +150 C temperature range, at 5 C min intervals. The plotted curve must be within tolerance range granted on the
12、 original material approval and it shall constitute the reference standard for materials supplied to this specification and shall be kept on file at designated material laboratory and be available on request. ENGINEERING MATERIAL SPECIFICATION WSS-M4D873-A3/A4 Copyright 2011, Ford Global Technologie
13、s, LLC Page 3 of 5 (s) 3.3.7 Impact Strength, Izod, (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.3.7.1 At 23 +/- 2 C no break 3.3.7.2 At -40 +/- 2 C 4 kJ/m 3.3.7.3 At 0 +/- 2 C no break The test specimens must be conditioned for minimum of 6 h at the above specified
14、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. (s) 3.3.8 Heat Deflection Temperature, min 45 C (ISO 75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm specimen, flatwise, 0.34 +/- 0.1 mm deflection.
15、At 1.80 MPa) 3.3.9 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1,000 h at 130 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.3.9.1 Tensile Strength at Yield Change +/- 25% (Test Method per para 3.3.4) 3.3.9.2 Impact Stren
16、gth, Izod no break (Test Method per para 3.3.7.1, specimens to be notched before heat aging) 3.4 WEATHERING RESISTANCE (WSS-M4D873-A3 only) After exposure in accordance with para 3.4.1, 3.4.2 and 3.4.3 the material shall show no color change in excess of specified Gray Scale rating (AATCC Evaluation
17、 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 appearance can be achieved by washing and/or polishing with Ford car polish (auto wax) after the outdoor exposure, at permissi
18、on of the affected Product Development Materials Activity. All initial approvals will be based on the preliminary Weatherometer exposure, pending Florida and Arizona exposure results for final approval. ENGINEERING MATERIAL SPECIFICATION WSS-M4D873-A3/A4 Copyright 2011, Ford Global Technologies, LLC
19、 Page 4 of 5 3.4.1 Xenon Arc Weatherometer Rating 4 - 5 (SAE J1960, 2500 kJ/m exposure minimum, specimen size: 60 x 60 minimum, 2.0 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 3.4.2 12 months Florida Rating 4 - 5 12 months Arizona (NAAO only) (SAE J1976, 5 south, direct we
20、athering inland, specimen size: 60 x 60 minimum, 2.0 +/- 0.1 mm thick, smooth surface, low gloss injection molded specimen) 3.4.3 24 months Florida Rating 4 24 months Arizona (NAAO only) (SAE J1976, 5 south, direct weathering inland, specimen size: 60 x 60 minimum, 2.0 +/- 0.1 mm thick, smooth surfa
21、ce, low gloss injection molded specimen) 3.5 MOVED TO PARAGRAPH 4.4 3.6 PAINTABILITY (WSS-M4D873-A4 only) Samples painted according to the production process must meet paint performance specification WSS-M2P181-A. For information only, no requirement: Surface Tension Samples flame treated prior to p
22、ainting may show various levels for Surface Tension: Medium min 40 m/Nm Note: preferred for painting Low approx. 30 m/Nm High approx. 50 m/Nm Measurement: Contact Angle Method 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements
23、of these specifications. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (ASTM E 831TMA) Temperature range -30 to +30 C 3 - 5 -5/C Temperature range +20 to +100 C 3.5 - 5.5-5/C ENGINEERING MATERIAL SPECIFICATION WSS-M4D873-A3/A4 Copyright 2011, Ford Global Technologies, LLC Page 5 of 5 4.2 IMPACT STRENG
24、TH CHARPY (ISO 179/1eA, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 4.2.1 At 23 +/- 2 C no break 4.2.2 At -40 +/- 2 C 4 kJ/m 4.2.3 At 0 +/- 2 C no break The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Low temperatu
25、re testing shall be done within the cold box, if not possible, test can be conducted outside, but within 5 s. 4.3 RECYCLING CODE PP+EPDM-M20 4.4 MOLD SHRINKAGE 4.4.1 Molding Shrinkage, max after 48 h at 23 +/- 2 C (measuring in dependence on ISO 2577, approximately 200 x 100 x 2.5 +/- 0.1 mm injecti
26、on molded specimen) With flow 0.5% Cross flow 0.7% 4.4.2 Post Shrinkage, max (measuring in dependence on ISO 2577, approximately 200 x 100 x 2.5 +/- 0.1 mm injection molded specimen, separate for each test) 4.4.2.1 After 48 h at 80 C With flow 0.1% Cross flow 0.1% 4.4.2.2 After 30 minutes at 120 C With flow 0.2% Cross flow 0.2%
