1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 11 10 N-STATUS WSS-M4D873-A3 replaced by WSS-M4D492-B1; WSS-M4D873-A4 replaced by WSS-M4D492-B2 2005 02 16 Revised Para 3.2.1, 3.3.1, 3.3.3, 3.3.4, para 3.5 moved to para 4.4 L. Rodigas 2002 07 16 Activated L. Rodigas Printed copies are
2、uncontrolled Copyright 2006, 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 EXPAN
3、SION, HIGH IMPACT MOLDING COMPOUND, 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 polypr
4、opylene copolymers and rubber, 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
5、or other parts of bumper system, 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 specificati
6、on, identified by symbol (s), 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) ENGI
7、NEERING MATERIAL SPECIFICATION WSS-M4D873-A3/A4 Printed copies are uncontrolled Copyright 2006, 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 spec
8、imens. The following dimensions are required: A. 150 min x 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
9、 be prepared according to ISO 294-1. No annealing allowed. 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
10、 speed) (s) 3.3.5 Flexural Modulus, min 1.4 GPa (ISO 178, Method 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 approx
11、imately 60 x 10 x 4.0 +/ 0.2mm cut from the center of specimen 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
12、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 designated material laboratory and be available on request. ENGINEERING MATERIAL SPECIFICATI
13、ON WSS-M4D873-A3/A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, 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
14、 no break 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. (s) 3.3.8 Heat Deflection Temperature, min 45 C (ISO
15、 75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm specimen, flatwise, 0.34 +/- 0.1 mm deflection. 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
16、 Tensile Strength at Yield Change +/- 25% (Test Method per para 3.3.4) 3.3.9.2 Impact Strength, 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 mat
17、erial 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 appearance can be achieved by washi
18、ng and/or polishing with Ford car polish (auto wax) after the outdoor exposure, at permission 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. ENGINE
19、ERING MATERIAL SPECIFICATION WSS-M4D873-A3/A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC 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 i
20、njection molded specimen) 3.4.2 12 months Florida Rating 4 - 5 12 months Arizona (NAAO only) (SAE J1976, 5 south, direct weathering 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 (N
21、AAO only) (SAE J1976, 5 south, direct weathering inland, specimen size: 60 x 60 minimum, 2.0 +/- 0.1 mm thick, smooth surface, 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 per
22、formance specification WSS-M2P181-A. For information only, no requirement: Surface Tension Samples flame treated prior to painting 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
23、. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements 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 ENGI
24、NEERING MATERIAL SPECIFICATION WSS-M4D873-A3/A4 Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 5 of 5 4.2 IMPACT STRENGTH 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
25、.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 temperature 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
26、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 injection 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%
