1、 ENGINEERING MATERIAL SPECIFICATION Date Action Revisions 2006 12 19 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.8 & 4 1995 02 07 Activated L.P. Gullen Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 1 of 2 POLYTETRAFLUOROETHYLENE (PTFE) FILM, WSL-M99D64-A EXPAN
2、DED, FUEL/ALCOHOL RESISTANT 1. SCOPE This specification defines a thermoplastic, expanded film based on polytetrafluoroethylene with good resistance to fuel/alcohol blends and good flex fatigue resistance. 2. APPLICATION This specification was released originally for a fuel fill anti-expulsion devic
3、e. 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). 3.4 PHYSICAL PROPERTIES 3.4.1 Density 0.947 +/- 3 g/cm3 (Dimensional Method) WMD AMD 3.4.2 Tensile
4、 Strength, MPa, min 6.5 35 (ISO 37/ASTM D 412, Die C) Elongation, %, min 500 10 3.4.3 Tear Strength, kN/m, min 45 60 (ISO 34, Method B/ ASTM D 624, Die C) 3.5 IMMERSION IN AUTOOXIZED FUEL PN180 (ISO 1817/ASTM D 471, 168 h at 40 +/- 1 C) 3.5.1 Tensile Strength Change, max +35% 3.5.2 Elongation Change
5、, max +35% 3.5.3 Volume Change, max -5% 3.5.4 Volume Change After Dry Out, max -10% (22 h at 70 C) ENGINEERING MATERIAL SPECIFICATION WSL-M99D64-A Printed copies are uncontrolled Copyright 2006, Ford Global Technologies, LLC Page 2 of 2 3.6 IMMERSION IN 75% FUEL C and 25% METHANOL (ISO 1817/ASTM D 4
6、71, 168 h at 40 +/- 1 C) 3.6.1 Tensile Strength Change, max +15% 3.6.2 Elongation Change, max +10% 3.6.3 Volume Change, max -5% 3.6.4 Volume Change After Dry Out, max -10% 3.7 HEAT AGED (ISO 188/ASTM D 573, 150 +/- 50 Air Changes/h, 1000 h at 150 +/- 2 C) 3.7.1 Tensile Strength Change, max -40% 3.7.2 Elongation Change, max +10% 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specification. 5.1 RECYCLING CODE PTFE
