1、 ENGINEERING MATERIAL SPECIFICATION Material Name Specification Number Date Para. No. Revisions 2009 07 22 N-STATUS Replaced by WSK-M4D644-A Y. Bankowski, NA 1980 05 27 3.1.2 3.3.1 Revised, was 538 C R#3-7/CHSK-Rd-876099 1977 07 23 Released R#161 CHBE-RD-560312 Page 1 of 4 POLYPROPYLENE, TALC FILLED
2、 - HEAT STABILIZED ESH-M4D166-C INJECTION MOLDING COMPOUND NOT TO BE USED FOR NEW DESIGN 1. SCOPE: The material defined by this specification is a prime quality polypropylene, talc filled, pigmented and heat stabilized to withstand 150 C for not less than 1,000 h. 2. APPLICATION: This specification
3、was released originally for injection molding heater and air conditioning ducts and similar components which are exposed to heater temperatures, and may be used in the passenger compartment or underhood. 3. REQUIREMENTS: 3.1 RESIN 3.1.1 Flow Rate (ASTM D 1238, Condition “L“) As Received 3 - 8 g/10 m
4、in After Heat Aging 24 h at 150 C, max 1.2 x original 3.1.2 Filler (Talc - Mg3Si4O10(OH)2) 37-43 % (Ash at 450 C, 1 h) The filler X-ray diffraction pattern shall match the powder method pattern on file at the appropriate materials engineering office. 3.1.3 Moisture Content, max 0.1 % Test Method: Dr
5、y 10 g sample of pellets in a circulating air oven for 2 h at 105 C. Calculate % moisture from weight loss. 3.2 MOLDED TEST SPECIMENS 3.2.1 Tensile Strength, ultimate, min 4200 psi (29 MPa) (ASTM D 638, Speed “C“) 3.1.2.1 Elongation, min At yield 4 % Ultimate 10 % ENGINEERING MATERIAL SPECIFICATION
6、ESH-M4D166-C Page 2 of 4 3.2.2 Long Term Heat Aging (150 C, 1,000 h, min) No whitening, crazing or loss in gloss permitted. There shall be no more than 30 % loss in tensile strength. 3.2.3 Specific Gravity 1.18 - 1.27 (ASTM D 792) 3.2.4 Impact Strength, Izod, min 4.0 ft lb/in (213 J/m) (ASTM D 256,
7、unnotched, 23 +/- 2 C) 3.2.5 Deflection Temperature, min (ASTM D 648) At 66 psi (455 kPa) 127 C At 264 psi (1820 kPa) 77 C 3.2.6 Flexural Modulus, min 500 000 psi (3.5 GPa) (ASTM D 790) *3.2.7 Infrared Spectrophotometry/Thermal Analysis Ford Motor Company, at its option, may conduct infrared and/or
8、thermal analysis of material/parts supplied to this specification. The curves established for initial approval shall constitute the reference standard and shall be kept on file at Central Laboratory. All samples shall produce curves that correspond to the reference standard when tested under the sam
9、e conditions as those specified on the master curve. *3.2.8 Accelerated Oxidative Stability (DSC) The oxidative induction temperature generated at a programmed heating rate of 20 C/min in air at 1 atmosphere (zero flow rate) shall not be less than that generated on the initial sample. Test Method: P
10、repare a thin, flat-surfaced wafer weighing approximately 5 mg. Heating rate, 20 C/min; pen sensitivity scale, 0.5 (mcal/sec)/in (8.25 x 10-5W/mm). Place the sample in an aluminum pan and set it on the DSC sample platform. Place an empty pan on the reference platform and cover the cell. After the me
11、lt point exothermic peak, the pen will first trace a straight line, then a rapid exothermic rise. The induction temperature shall be taken as the temperature corresponding to the intersection of the extrapolations of the baseline and the exothermic peak. The results obtained from 2 runs shall be wit
12、hin one degree. *Note: These tests may be conducted by Ford at its option. ENGINEERING MATERIAL SPECIFICATION ESH-M4D166-C Page 3 of 4 3.3 FINISHED PART 3.3.1 FILLER (Talc - Mg3Si4O10(OH)2) 37 - 43 % (Ash at 450 C, 1 h) The filler X-ray diffraction pattern shall match the powder method pattern on fi
13、le at the appropriate materials engineering office. *3.3.2 Infrared Spectrophotometry/Thermal Analysis Ford Motor Company, at its option, may conduct infrared and/or thermal analysis of material/parts supplied to this specification. The curves established for initial approval shall constitute the re
14、ference standard and shall be kept on file at Central Laboratory. All samples shall produce curves that correspond to the reference standard when tested under the same conditions as those specified on the master curve. *3.3.3 Accelerated Oxidative Stability The oxidative induction temperature genera
15、ted at a programmed heating rate of 20 C/min in air at 1 atmosphere (zero flow rate) shall not be less than that generated on the initial sample. Test Method: Prepare a thin, flat-surfaced wafer weighing approximately 5 mg. Heating rate, 20 C/min; pen sensitivity scale, 0.5 (mcal/sec)/in (8.25 x 10-
16、5W/mm). Place the sample in an aluminum pan and set it on the DSC sample platform. Place an empty pan on the reference platform and cover the cell. After the melt point exothermic peak, the pen will first trace a straight line, then a rapid exothermic rise. The induction temperature shall be taken a
17、s the temperature corresponding to the intersection of the extrapolations of the baseline and the exothermic peak. The results obtained from 2 runs shall be within one degree. *Note: These tests may be conducted by Ford at its option. 3.4 MATERIAL COMPOSITION AND IDENTIFICATION All products approved
18、 to this specification shall have a specific product identification. Suppliers using more than one polypropylene source or product quality shall have separate identification and approval for each combination. Once approval is granted there shall be no change or modification in source or processing o
19、f the polypropylene, the stabilizer system, talc or pigment without prior Materials Engineering approval. Nor shall there be any change in particle size of the filler or pigment without prior approval. ENGINEERING MATERIAL SPECIFICATION ESH-M4D166-C Page 4 of 4 3.5 SUPPLIERS RESPONSIBILITY Material
20、supplied to this specification must be equivalent to that originally approved. Changes in formulation or processing shall not be made without prior approval as described in Supplier Procedure I-A. 4. APPROVAL OF SUPPLIERS: Suppliers to this specification must be approved by the affected product engineering office. Procedure for gaining approval of a specific material to a new/existing ES-M specification is contained in Supplier Procedure I-A. Approved new suppliers will be added to the Engineering Materials Approved Source List.
