1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions Rev. 4 2014 09 16 Editorial See Summary of Revisions K. Mueller, NA 2014 09 10 Editorial See Summary of Revisions K. Mueller, NA 2006 09 29 Activated M. Myers Controlled document at www.MATS Copyright 2014, Ford Global Technologies, LLC Page
2、1 of 6 POLYPHENYLENE ETHER + POLYAMIDE BLEND (PPE+PA) WSS-M4D989-B CONDUCTIVE MOLDING COMPOUND 1. SCOPE The material defined by this specification is a conductive thermoplastic molding compound based on polyphenylene ether and polyamide blend. 2. APPLICATION This specification was released originall
3、y for material used for exterior components such as fuel filler doors that do not require a conductive primer and can be painted with basecoat/clearcoat systems in the assembly plant with the vehicle body. NOTICE: This material absorbs and retains moisture. Part design and tolerances must accommodat
4、e changes in part dimensions and physical properties due to moisture absorption or loss in the service/assembly environment. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.1 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material supplier
5、s and part producers must conform to the Companys Standard Requirements For Production Materials (WSS-M99P1111-A). 3.1.1 This specification is based on virgin material only. The use of in-house regrind is not allowed unless the part is validated during PV testing with the documented level of regrind
6、 noted on the part drawing. 3.2 MOLDING COMPOUND 3.2.1 Melt Volume Rate 8 25 cm3/ (ISO 1133, 280 C, 5.0 kg) 10 minutes The material shall be dried for 30 min minimum at 95 C in a mechanical convection oven immediately preceding the test. ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-B Copyright 2014
7、, Ford Global Technologies, LLC Page 2 of 6 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 minimum x 10 x 4.0 +/- 0.2 mm (ISO 3167,
8、Type 1A) B. 60 x 60 x 2.0 +/- 0.1 mm (ISO/DIS 294-3) C. 355 x 100 x 1.0 +/-0.1 mm (ISO 3795) 3.3.2 Density 1.07 1.13 g/cm3 (ISO 1183, Method A) 3.3.3 Tensile Strength at Yield 53 MPa min (ISO 527-1 150 x 1 x 4 mm specimen specimen A). Test speed shall be 5 mm/minute for all materials. Provide a curv
9、e of tensile stress versus strain using one specimen per lot at each of the following temperatures: -20 C, 23 C, 60 C and 90 C. For ductile materials, the curve shall cover strain through yield point. 3.3.5 Impact Strength, Izod, notched (Initial Qualification) (ISO 180/1A, 80 x 10 x 4.0 +/- 0.2 mm
10、specimen use center section of specimen A, 10 specimens for each test) 3.3.5.1 At 23 +/- 2 C 6.0 kJ/m2 min 3.3.5.2 At -40 +/- 1 C 1.9 kJ/m2 min The test specimen must be conditioned for minimum of 6 hours at the above specified temperature prior to impact test. Low temperature testing shall be done
11、within the cold chamber, if not possible, test may be conducted outside, but within 5 seconds. 3.3.6 Tensile Modulus 2.2 GPa min (ISO 527-1 & ISO 527-2, 150 minimum x 10 x 4.0 +/- 0.2 mm specimen test speed: 1mm/minute) ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-B Copyright 2014, Ford Global Tech
12、nologies, LLC Page 3 of 6 3.3.7 Charpy, notched, min (ISO 179/1eA, 80 x 10 x 4.0 +/- 0.2 specimen use center section of specimen A, 10 specimens 3.3.7.1 At 23 +/- 2 C 8.5 kJ/m2 min 3.3.7.2 At -40 +/- 2 C 1.5 kJ/m2 min 3.3.7.3 At -20 +/- 2 C 4.5 kJ/m2 min The test specimen must be conditioned for min
13、imum of 6 hours at the above specified temperature prior to impact test. Low temperature testing shall be done within the cold chamber, if not possible, test may be conducted outside, but within 5 seconds. 3.3.8 Heat Deflection Temperature 112 C min (ISO 75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm spe
14、cimen use center section of specimen A, flatwise, 0.34 +/- 0.1 mm deflection. At 1.80 MPa) All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, moisture-proof container filled with silica gel. 3.3.9 Vicat Softening Temperature 192 C min (ISO 306
15、, 10 x 10 x 4.0 +/- 0.2 mm specimens use center section of specimen A. Bath - silicone oil, temperature raise 50 +/- 5 C/h. Dial gage reset to O after addition of 5 kg weight. At 50 N load) All specimens dry as molded. If not tested immediately after molding, specimens must be stored in a sealed, mo
16、isture-proof container filled with silica gel. 3.3.10 Heat Aging Performance (ISO 188, except 150 +/- 50 air changes/h, 1000 h at 80 +/- 2 C. After heat aging test specimens are to be conditioned in a desiccator for 3 - 5 h at 23 +/- 2 C. Unaged property values shall be determined at the time of the
17、 aged properties determination) 3.3.10.1 Tensile Strength at Yield, Change +/- 25% 3.3.10.2 Impact Strength, Izod, Change +/- 25% (Test Method per para 3.5.6.1, specimens to be notched before heat aging) ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-B Copyright 2014, Ford Global Technologies, LLC Pa
18、ge 4 of 6 3.4 FOGGING (SAE J1756, 3 h at 100 C heating, 21 C cooling plate, post test conditioning 1 h and 16 h) Fog Number 90 min Formation of clear film, droplets or crystals is cause for rejection. 3.5 FLAMMABILITY (ISO 3795/SAE J369) Burn Rate 100 mm/minute max The specimen size required for mat
19、erial approval is 355 x 100 x 2.0 +/- 0.1 mm (use specimen C) with a smooth surface. 3.6 VOLUME RESISTIVITY 0 - 100 k-ohm-cm (IEC 60093) 4. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. Contact for que
20、stions concerning Engineering Material Specifications. 4.1 COEFFICIENT OF LINEAR THERMAL EXPANSION (ASTM E 831, temperature 20 to +100 C) With Flow 10.5-5/C Cross Flow 10.7-5/C 4.2 MOLD SHRINKAGE (ISO 294-3 and 294-4, 60 x 60 x 2.0 +/- 0.1 mm injection molded specimen) 4.2.1 Molding Shrinkage . Afte
21、r 48 h at 23 +/- 2 C With Flow 1.5% Cross Flow 1.5% ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-B Copyright 2014, Ford Global Technologies, LLC Page 5 of 6 4.2.2 Post Shrinkage (Separate specimens required for each test) . After 48 h at 80 C With Flow 1.6% Cross Flow 1.6% . After 30 minutes at 120
22、 C With Flow 1.7% Cross Flow 1.7% 4.3 WATER ABSORPTION 4.2% (ISO 62, 24 h immersion, 50 +/- 1 mm diameter, 3.2 +/- 0.2 mm thick specimen) 4.4 MELT TEMPERATURE 260 C (ISO 3146, Method C, 10 C/min heating rate) 4.5 HEAT DEFLECTION TEMPERATURE 186 C (ISO 75-1 & ISO 75-2, 80 x 10 x 4.0 +/- 0.2 mm specim
23、en use center section of specimen A, flatwise, 0.34 +/- 0.1 mm deflection. At 0.45 MPa) 4.6 MATERIAL IDENTIFICATION FOR RECYCLING PURPOSES (ISO 1043 Marking of Plastic Parts (Latest) PPE+PA 5. SUMMARY OF REVISIONS 2014 09 16 Editorial removed ISO prefix from method in 3.6. 2014 09 10 Editorial corre
24、cted method and unit. 2013 12 12 Revised Melt Volume Rate max from 20 to 25 Revised Tensile Strength at Yield min from 55.0 to 53 MPa Revised Tensile Modulus min from 2.3 to 2.2 GPa Revised Heat Deflection Temperature from 187 to186 C Removed requirement for 3 sigma range to meet Melt Volume Rate, Tensile Strength at Yield and Elongation, Tensile Modulus, Charpy, notched, and Vicat Softening. 2006 12 06 Revised title ENGINEERING MATERIAL SPECIFICATION WSS-M4D989-B Copyright 2014, Ford Global Technologies, LLC Page 6 of 6
