1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 02 2015 03 27 N Status Replaced by WSS/WRS- M4D670-B series K. Mueller, NA 1995 06 01 2005 10 31 Revised 1991 11 04 Released EP00E01089490000 L. Rodigas Controlled document at www.MATS Copyright 2015, Ford Global Technologies, LLC Page 1
2、of 4 POLYPROPYLENE (PP) AND THERMOPLASTIC WSK-M4D670-A3 POLYOLEFIN ELASTOMER (TEO) BLEND, RECOMPOUNDED MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The materials defined by this specification are recompounded thermoplastic injection molding compounds based on a physical blend of unpainted
3、, painted, and unpainted recycled unfilled polypropylene and/or thermoplastic polyolefin elastomers from post consumer parts like bumpers, fender liners, etc. 2. APPLICATION This specification was released originally for recompounded materials used for front fender liners which are unexposed to sunl
4、ight. 3. REQUIREMENTS 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
5、representing 3 sigma values. 3.3 MOLDING COMPOUND (s) 3.3.1 Melt Flow Rate 6 - 18 g/10 minutes (ISO 1133, 230 C, 2.16 kg) (s) 3.3.2 Ash Content, max 9% (ISO 3451/1, Method A 3 h at 850 +/- 50 C, test portion 5 to 10 g) 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens Unless otherwise spe
6、cified all tests shall be carried out on injection molded one-end gated test specimens. The following dimensions 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 spec
7、imen A and/or B. The specimens shall be prepared according to ISO 294. No annealing allowed. ENGINEERING MATERIAL SPECIFICATION WSK-M4D670-A3 Copyright 2015, Ford Global Technologies, LLC Page 2 of 4 3.4.2 Density 0.88 - 0.98 g/cm3 (ISO 1183, Method A) (s) 3.4.3 Tensile Strength at Yield, min 20 MPa
8、 (ISO R 527, 150 x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) 3.4.3.1 Elongation at Yield, min 4% (Test according to para 3.4.3) (s) 3.4.4 Flexural Modulus, min 0.6 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) 3.4.5 Shear Modulus at 23 C 430 - 72
9、0 MPa (ASTM D 4065, forced constant 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) (s) 3.4.6 Impact
10、Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.4.6.1 At 23 +/- 2 C 4.5 kJ/m2 3.4.6.2 At -40 +/- 2 C 2.5 kJ/m2 3.4.6.3 At 10 +/- 2 C 3 kJ/m2 The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact
11、test. Low temperature testing shall be done within the cold box. (s) 3.4.7 Heat Deflection Temperature, min (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, edgewise, 0.32 +/- 0.01 mm deflection) 3.4.7.1 At 1.80 MPa 42 C 3.4.7.2 At 0.45 MPa 70 C ENGINEERING MATERIAL SPECIFICATION WSK-M4D670-A3 Copyright
12、 2015, Ford Global Technologies, LLC Page 3 of 4 3.4.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 130 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) 3.4.8.1 Tensile Strength at Yield Change +/- 25% (Test Method p
13、er para 3.4.3) 3.4.8.2 Impact Strength, Izod Change, max -25% (Test Method per para 3.4.6.1, specimens to be notched before heat aging) 3.5 FLAMMABILITY (ISO 3795) Burn Rate, max 100 mm/minute The specimen size required for material approval is 355 x 100 x 1.0 +/- 0.1 mm with a smooth surface. 3.6 F
14、OGGING (FLTM BO 116-03, 3 h at 100 C heating, 21 C cooling plate) Fog Number, min 80 Formation of clear film, droplets or crystals is cause for rejection. 3.8.1 For recycled/recompounded materials from post consumer parts, notification by supplier about changes in the composition and/or color is wai
15、ved. 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 7.5-5/ C (ASTM E 831 TMA, temperature range -20 to +80 C) 5.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 10
16、0 x 3.2 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage . After 48 h at 23 +/- 2 C 1.2 - 2.0% ENGINEERING MATERIAL SPECIFICATION WSK-M4D670-A3 Copyright 2015, Ford Global Technologies, LLC Page 4 of 4 5.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C
17、 0.2% . After 30 min at 120 C 0.35% 5.3 COMPOUND Physical blend of up to 50% by weight of unpainted and up to 25% by weight of painted and 25% by weight of unpainted recycled unfilled polypropylene and/or thermoplastic polyolefin elastomers from post consumer parts. If required, the specified quality level of the compounds can be achieved by using polypropylene copolymers from reprocessed/reground and/or secondary quality compounds, and/or by admixing of impact modifier. 5.4 RECYCLING CODE PP+EPDM
