1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 13 N-STATUS No Replacement Named C. Mracna, NA 2004 07 27 Revised Para 3.0 inserted; para 3.4, 3.5 & 4 deleted 1978 10 06 Released R #10-3/CH8H-RD-834180 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Pag
2、e 1 of 2 ELASTOMER, POLYESTER - EXTRUSION GRADE ESH-M2D230-A5 NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic polyester elastomeric extrusion compound. 2. APPLICATION This specification was released originally for material used for air conditionin
3、g and heater vacuum lines requiring a good resistance to the engine compartment environment. 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 RESI
4、N 3.1.1 Flow Rate 5 - 9 g/10 min (ASTM D 1238, 2160 g load, 220) 3.1.2 Specific Gravity 1.17 - 1.23 (ASTM D 792) 3.1.3 Moisture Content, max 0.1% Test Method: Dry 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 SLAB 3.2.1 Hard
5、ness, Durometer “D“ 54 - 60 (ASTM D 2240) 3.2.2 Tensile Stress at Yield, min 12.5 MPa (ASTM D 638) 3.2.3 Flexural Modulus 180 - 230 MPa (ASTM D 790) 3.2.4 Heat Aging (ASTM D 573, 21 days at 125 C) Hardness Change, max -5 to +10 (ASTM D 2240) Tensile Stress at Yield Change, max +20 to +40% (ASTM D 63
6、8) ENGINEERING MATERIAL SPECIFICATIONESH-M2D230-A5 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 2 3.2.5 Immersion in ASTM Oil No. 3 (ASTM D 471, 168 h at 125 C) Hardness Change, max -10, +5 Tensile Stress at Yield Change, max 0 to +30% 3.3 EXTRUDED TUBE 3.3
7、.1 Flow Rate 5 - 9 g/10 min (ASTM D 1238, 2160 g load, 220) 3.3.2 Tension Test, min 18 kg (1.4 mm I.D.) Test Method: The ends of a 125 mm length of tubing shall be fastened in the jaws of a tensile testing machine. The jaw separation rate shall be 500 +/- 25 mm/min until rupture of the tubing occurs
8、. 3.3.3 Vacuum Collapse, max 20% Test Method: The collapse of the outside diameter of the tubing under internal vacuum of 81 kPa for 5 min at 20 +/- 2 C shall not exceed 20%. The test shall be made with the tubing curved to a radius equal to five times the maximum 0.D. of the sample. 3.3.4 Tear Resi
9、stance Must not tear Test Method: The tubing shall be expanded to a minimum internal diameter of 2-1/2 times the normal I.D. by forcing the tubing over a 30 tapered, clean metal cone lubricated with a silicone parting agent and having a maximum finish of 20 m in (0.5 m) rms. 3.3.5 Burst Pressure, mi
10、n 11 MPa (ASTM D 380) 3.3.6 Cold Resistance Shall not show fractures, cracks or breaks. Test Method: The tubing shall be conditioned 5 h at -40 C after which the tubing shall be flexed in the cold chamber through 180 from the centerline in each direction over a mandrel having a diameter 10 times the
11、 maximum O.D. of the tubing for 5 cycles. The rate of cycling shall be approximately one cycle in 4 s. 3.3.7 Ozone Resistance ESB-M9P1-A 3.3.8 Heat Aging (ASTM D 573, 70 h at 100 C) Cold Resistance: Must meet the requirements of para 3.3.6 Tear Resistance: Must meet the requirements of para 3.3.4 Vacuum Collapse: Must meet the requirements of para 3.3.3
