1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev 01 2013 09 13 N Status No replacement named M. Gramlich, NA 2003 06 24 Activated M. A. Myers Controlled document at www.MATS Copyright 2013, Ford Global Technologies, Inc. Page 1 of 6 POLYPHENYLENE ETHER + POLYAMIDE BLEND (PPE+PA) WSS-M4D
2、989-A 17% MINERAL FILLED CONDUCTIVE MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a mineral filled and conductive thermoplastic molding compound based on polyphenylene ether and polyamide blend. 2. APPLICATION This specification was released or
3、iginally for material used for fuel filler doors that do not require a conductive primer and can be painted in the assembly plant with the body. Notice: This material absorbs and retains moisture. Part design and tolerances must accommodate changes in part dimensions and physical properties due to m
4、oisture absorption or loss in the service/assembly environment. 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 specif
5、ication, identified by symbol (s), shall be met with data representing 3 sigma values. 3.2 MOLDING COMPOUND (s) 3.2.1 Melt Volume Rate 7.0 - 20.0 g/10 minutes (ISO 1133, 280 C, 2.16 kg) The material shall be dried for 30 minutes minimum at 95 C in a mechanical convection oven immediately preceding t
6、he test. 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 10 x 4.0 +/- 0.2 mm (Tensile Bar, ISO 3167) B. 120 x 10 x 4.0 +/- 0.2
7、mm ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-A Copyright 2013, Ford Global Technologies, Inc. Page 2 of 6 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. 3.3.2 Dens
8、ity 1.22 - 1.28 g/cm3 (ISO 1183, Method A) (s) 3.3.3 Tensile Strength at Break, min 60 MPa (ISO R 527, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen, 50 mm/min test speed) (s) 3.3.4 Flexural Modulus, min 3.5 GPa (ISO 178, 80 x 10 x 4.0 +/- 0.2 mm specimen, 2 mm/min test speed, 64 mm support span) (s) 3
9、.3.5 Impact Strength, Izod, min (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm specimen, 10 specimens for each test) 3.3.5.1 At 23 +/- 2 C 1.5 kJ/m2 3.3.5.2 At - 40 +/- 1 C 1.0 kJ/m2 The test specimens must be conditioned for minimum of 6 h at the above specified temperature prior to impact test. Low tempera
10、ture testing shall be done within the cold box. (s) 3.3.6 Heat Deflection Temperature, min 135 C (ISO 75, 120 x 10 x 4.0 +/- 0.2 mm specimen, flatwise, 0.32 +/- 0.01 mm deflection 1.80 MPa) All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, mo
11、isture-proof container filled with silica gel. (s) 3.3.7 Vicat Softening Temperature, min 198 C (ISO 306, 10 x 10 x 4.0 +/- 0.2 mm specimens. Bath - silicone oil, temperature raise 50 +/- 5 C/h. Dial gage reset to 0 after addition of 5 kg weight. At 50 N load) All specimens dry as molded. If not tes
12、ted immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. 3.3.8 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 85 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determinat
13、ion) ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-A Copyright 2013, Ford Global Technologies, Inc. Page 3 of 6 3.3.8.1 Tensile Strength at Yield Change +/- 25% (Test Method per para 3.5.3) 3.3.8.2 Impact Strength, Izod Change +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before hea
14、t aging) 3.4 VOLUME RESISTIVITY 0 -100 k-ohm/cm (ISO IEC 93) 3.5 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number, min 90 Formation of clear film, droplets or crystals is cause for rejection. 3.6 FLAMMABILITY (ISO 3795) Burn Rate, max 100
15、mm/minute The specimen size required for material approval is 355 x 100 x 2.0 +/- 0.1 mm with a smooth surface. 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSI
16、ON 5.2 - 5.7E-5 mm/ C (ASTM E 831 (TMA), temperature range - 30 to + 100 C) 4.2 MOLD SHRINKAGE (ISO 2577, approx. 150 x 100 x 3.2 +/- 0.2 mm injection molded specimen) 4.2.1 Molding Shrinkage After 48 h at 23 +/- 2 C 8.5 - 9.1% 4.3 MELT FLOW RATE 8.0 - 21.0 g/10 minutes (ISO 1133, 280 C, 2.16 kg) 4.
17、4 WATER ABSORPTION 0.5% (ISO 62, 24 h immersion, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-A Copyright 2013, Ford Global Technologies, Inc. Page 4 of 6 4.5 MELT TEMPERATURE 262 C (ISO 3146, Method C) 4.6 RECYCLING CODE PPE+PA-M17 4.7 SHEAR MOD
18、ULUS at 23 C 1.32 - 2.20 GPa (ASTM D 4065, forced constant amplitude, fixed frequency of 1 Hz +/- 15 %, strain level below 1 %. Specimens approximately 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 minute
19、s min) Additionally a shear modulus versus temperature curve shall be plotted for - 50 to + 220 C temperature range, at 5 C min intervals. The plotted curve must be within tolerance range granted on the original material approval and it shall constitute the reference standard for materials supplied
20、to this specification and shall be kept on file at the designated material laboratory and be available on request. 4.8 TENSILE STRESS/STRAIN CURVES (ISO 527-1, 527-2, ISO 11403-1; 150 x 1 x 4 mm specimen specimen A Test speed shall be 5 mm/minute for all materials. Provide a curve of tensile stress/
21、strain using one specimen at each of the following temperatures: 23, 50, 80 and 105 C. For ductile materials, the curve shall cover strain through yield point. ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-A Copyright 2013, Ford Global Technologies, Inc. Page 5 of 6 ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-A Copyright 2013, Ford Global Technologies, Inc. Page 6 of 6
