1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 08 26 N-STATUS Use industry standard C. Mracna, NA 2004 09 15 Revised Para 3.0 inserted; para 3.1, 3.2, 3.3, 3.8 & 4 deleted 1989 09 06 Released SM/ER 5934 TC P. Thomas Printed copies are uncontrolled Copyright 2009, Ford Global Technolog
2、ies, LLC Page 1 of 4 THERMOPLASTIC ELASTOMER (TPE), POLYOLEFIN, WSD-M2D381-A2 EPDM RUBBER MODIFIED, MODERATE HEAT RESISTANT, FLAME RETARDANT, 82 DUROMETER A HARDNESS NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a thermoplastic elastomer based on EPDM rubber mo
3、dified polyolefin, with nominal 82 Durometer A hardness, with flame-retardancy and long term resistance to heat at temperatures up to 125 C. Being thermoplastic, the material will soften and creep at temperatures exceeding 165 C. 2. APPLICATION The specification was released originally for material
4、used for sheathing thermoplastic (typically Polyamide 11 or 12) fuel tubing. 3. REQUIREMENTS Material specification requirements are to be used for initial qualification of materials. 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Company
5、s Standard Requirements For Production Materials (WSS-M99P1111-A). 3.4 MOLDED TEST SPECIMEN 3.4.1 Preparation of Test Specimens Unless otherwise specified, all test shall be conducted on specimens die cut from injection molded plaques 150 x 100 x 2.0 +/- 0.2 mm. The plaques shall be molded according
6、 to ISO 294 and film gated along the upper 100 mm edge and preceded by a 0.8 mm diameter pin gate. No annealing allowed, unless specified otherwise. NOTE: See Paragraph 5.3 3.4.2 Density 1.18 - 1.30 g/cm3(ISO 1183, Method A/ASTM D 792, Method A1) 3.4.3 Hardness, International 84 - 94 (ISO 48/ASTM D
7、1415) 3.4.4 Hardness, Durometer A 77 - 87 (ISO 868/ASTM D 2240, instantaneous, plied-up specimen) ENGINEERING MATERIAL SPECIFICATIONWSD-M2D381-A2 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 2 of 4 3.4.5 Tensile Strength, min 5.2 MPa (ISO R 527, type 2/ASTM D 41
8、2, Die C, 500 mm/min test speed. Measured Parallel to Flow) 3.4.5.1 Elongation at Break, min 150% (Test per para 3.4.5) 3.4.6 Modulus at 100% Elongation, min 4.2 MPa (Test per para 3.4.5) 3.4.7 Tear strength, min (ISO 34, Method B, Procedure a/ ASTM D 624, Die C) 3.4.7.1 Parallel to Flow 20 kN/m 3.4
9、.7.2 Perpendicular to Flow 16 kN/m 3.4.8 Compression Set, max (ISO 815, Large Type-plied specimen/ASTM D 395, Method B, Type 1 plied specimen) 3.4.8.1 22 h at 70 +/- 1 C 50% 3.4.8.2 70 h at 125 +/- 2 C 75% 3.4.9 Brittleness Point, max -50 C (ISO 812, Type B specimen/ ASTM D 2137, Method A) 3.4.10 Oz
10、one Resistance, max Rating 0 (FLTM BP 101-01, at 20% elongation) 3.4.11 Flammability, max 0 mm/minute 3.5 HEAT AGING (ISO 188/ASTM D 573, 150 +/- 50 air changes/h, 1,000 h at 125 +/- 2 C. Unaged property values shall be determined at the time of the aged properties determination) Hardness Change, ma
11、x +/- 5 Tensile Strength Change, max +/- 10% Elongation Change, max -50% ENGINEERING MATERIAL SPECIFICATIONWSD-M2D381-A2 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 3 of 4 3.6 IMMERSION IN OIL NO. 1 (ISO 1817/ASTM D 471, 168 h at 125 +/- 2 C) Hardness Change, m
12、ax -25 Tensile Strength Change, max -40% Elongation Change, max -65% Volume Change, max +40% 3.7 IMMERSION IN OIL NO. 3 (ISO 1817/ASTM D 471, 168 h at 125 +/- 2 C) Hardness Change, max -35 Tensile Strength Change, max -50% Elongation Change, max -85% Volume Change, max +80% 5. GENERAL INFORMATION Th
13、e information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 COEFFICIENT OF LINEAR THERMAL 300 EXPANSION, E-6/ C (ASTM D 696) 5.2 MOLD SHRINKAGE (ISO 2577, 150 x 100 x 2.0 +/- 0.2 mm injection molded specimen) 5.2.1 Molding Shrinkage A
14、fter 48 h at 23 +/- 2 C Parallel to flow 1.1% Across flow 1.0% ENGINEERING MATERIAL SPECIFICATIONWSD-M2D381-A2 Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC Page 4 of 4 5.2.2 Post Shrinkage (Separate specimens required for each test) After 48 h at 80 +/- 2 C Parallel
15、to flow 0.4% Across flow 0.3% After 30 min at 120 +/- 2 C Parallel to flow 0.5% Across flow 0.2% 5.3 The tensile properties in this specification are measured in the parallel-to-flow direction which is the direction in which the material is at its weakest. The material is significantly stronger in the perpendicular-to-flow direction. 5.4 HARDNESS, DUROMETER A 75 - 85 (ISO 868/ASTM D 2240, 5 second delay, plied-up specimen) 5.5 RECYCLING CODE TEO
