1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2012 01 26 N Status Replaced by WSS-M4D1005-A1/2 A. Pan, APA 2005 10 31 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.7, 3.8 & 4 1994 03 15 Released C10387351 L. Rodigas Controlled document at www.MATS Copyright 2012, Ford Global Tech
2、nologies, LLC Page 1 of 5 POLYPROPYLENE (PP) COPOLYMER, MEDIUM HIGH WSK-M4D670-A4 IMPACT, COLOR PIGMENTED MOLDING COMPOUND, EXTERIOR NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic molding compound based on polypropylene copolymer with medium high
3、 impact strength, color pigmented and with added UV-stabilization for exterior use. This material is suitable for injection, extrusion and blow molding. 2. APPLICATION This specification was released originally for material used for sections of bumper shells on Transit. 3. REQUIREMENTS 3.0 STANDARD
4、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 representing 3 sigma values. 3.4 MO
5、LDING COMPOUND (s) 3.4.1 Melt Flow Rate 0.1 - 5.0 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 dimensions are required: A.
6、 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 Density 0.855 - 0.92 g/cm (ISO
7、 1183, Method A) ENGINEERING MATERIAL SPECIFICATION WSK-M4D670-A4 Copyright 2012, Ford Global Technologies, LLC Page 2 of 5 (s) 3.5.3 Tensile Strength at Yield, min 20 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) (s) 3.5.3.1 Elongation at Yield, min 5% (Test Meth
8、od according to para 3.5.3) (s) 3.5.4 Flexural Modulus, min 850 MPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.5.5 Shear Modulus at 23 C 310 - 580 MPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15%, strain level below 1%. Specime
9、n 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 curve shall be plotted for -50 to +150 C temperature range, at 5 C minimum inter
10、vals. The plotted curve must be within tolerance range shown on page 5. (s) 3.5.6 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.5.6.1 At 23 +/- 2 C 8 kJ/m 3.5.6.2 At -40 +/- 1 C 2.0 kJ/m 3.5.6.3 At 10 +/- 2 C 4.0 kJ/m The test specimens must
11、 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. (s) 3.5.7 Heat Deflection Temperature, min (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, 0.32 +/- 0.01 mm deflection) 3.5.7.1 At 1.80 MPa 45 C 3.5.7.2
12、 At 0.45 MPa 65 C ENGINEERING MATERIAL SPECIFICATION WSK-M4D670-A4 Copyright 2012, Ford Global Technologies, LLC Page 3 of 5 3.5.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 120 +/- 2 C. Unaged property values shall be determined at the time of the aged properties de
13、termination) 3.5.8.1 Tensile Strength at Yield Change +/- 25% (Test Method per para 3.5.3) 3.5.8.2 Impact Strength, Izod Change, max -25% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) 3.6 WEATHERING RESISTANCE After exposure in accordance with 3.6.1, 3.6.2 and 3.6.3, the
14、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 appearance can be achieved by wa
15、shing 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. 3.6
16、.1 Xenon Arc Weatherometer Rating 4-5 (SAE J1960, 1980 kJ/m2 exposure minimum, specimen size: 150 x 100 mm minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.6.2 12 months Florida Rating 4-5 12 months Arizona (NAAO only) (SAE J1976, 5 south, direct weathering inland, specimen size: 150
17、 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) 3.6.3 24 months Florida Rating 3-4 24 months Arizona (NAAO only) (SAE J1976, 5 south, direct weathering inland, specimen size: 150 x 100 mm, minimum, 3.2 +/- 0.2 mm thick, molded in smooth polished mold) ENGINEERING MATERIAL S
18、PECIFICATION WSK-M4D670-A4 Copyright 2012, Ford Global Technologies, LLC Page 4 of 5 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL EXPANSION 8 12-5/ C (ASTM E 228 or
19、 TMA, temperature range -30 to +100 C) 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 +/- 2 C 1.0 - 2.0% 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C 0.0 - 0.3% . After 30 min at 120 C 0.1 - 0.50 5.3 RECYCLING CODE PP ENGINEERING MATERIAL SPECIFICATION WSK-M4D670-A4 Copyright 2012, Ford Global Technologies, LLC Page 5 of 5
