1、 ENGINEERING MATERIAL SPECIFICATIONDate Action Revisions 2009 07 22 N-STATUS No Replacement Named Y. Bankowski, NA 2005 01 11 Revised Inserted 3.0; Deleted 3.1, 3.2, 3.3, 3.13, 3.14 & 4 1991 11 20 Released NC00E10079759017 L. Mastrofrancesco Printed copies are uncontrolled Copyright 2009, Ford Globa
2、l Technologies, LLC Page 1 of 2 POLYTETRAFLUOROETHYLENE (PTFE) ELASTOMERIC ESA-M4D142-A2 LUBRICANT WATER BASE POLYURETHANE BINDER, DIP OR SPRAY NOT TO BE USED FOR NEW DESIGN 1. SCOPE The material defined by this specification is a polytetrafluoroethylene (PTFE) solid film elastomeric lubricant with
3、a water base polyurethane binder. 2. APPLICATION This specification was released originally for material used to reduce friction in steering column boots. 3. REQUIREMENTS 3.0 STANDARD REQUIREMENTS FOR PRODUCTION MATERIALS Material suppliers and part producers must conform to the Companys Standard Re
4、quirements For Production Materials (WSS-M99P1111-A). 3.4 COLOR Black 3.5 SPECIFIC GRAVITY 1.21 - 1.24 (ISO 3675/ASTM D 1298) 3.6 VISCOSITY, at 25 C 25 - 250 mPa.s (ISO 3104/ASTM D 445) 3.7 FLASH POINT, min 93 C (ISO 2592/ASTM D 92) 3.8 VOLATILES 50 - 54% (ASTM D 972) 3.9 NON-VOLATILES 46 - 50% 3.9.
5、1 Polytetrafluoroethylene, min 86% (ASTM D 128) 3.9.2 Water Base Polyurethane Resin, min 11% 3.9.3 Carbon Black, min 2% 3.10 COEFFICIENT OF FRICTION 0.20 - 0.25 (ASTM D 3248) ENGINEERING MATERIAL SPECIFICATIONESA-M4D142-A2Printed copies are uncontrolled Copyright 2009, Ford Global Technologies, LLC
6、Page 2 of 2 3.11 FILM THICKNESS 0.005 - 0.038 mm (ASTM D 1005) 3.12 HUMIDITY RESISTANCE No blistering or (FLTM BQ 104-02, 240 h minimum) loss of film adhesion 5. GENERAL INFORMATION The information given below is provided for clarification and assistance in meeting the requirements of this specifica
7、tion. 5.1 MIXING Gently stir or roll can to redisperse any solids that may have settled out during storage. Note: Do not subject this material to violent stirring or shaking. This could cause the dispersion to coagulate or foam. 5.2 METHOD OF APPLICATION This material is supplied ready for use and m
8、ay be brush, dip or spray applied at a thickness of 0.0025 mm to 0.0125 mm. This material can be applied to substrates having temperatures up to 150 C. This allows application to rubber near the extruder. Clean equipment with water after use. If the coating has dried, use MEK. 5.3 CURING This materi
9、al requires time and/or temperature to properly cure the urethane resin. Several cure cycles can be effectively used: a) Air dry for 16 - 24 h b) 65 - 120 C for 5 - 10 minutes c) 120 - 175 C for 5 minutes d) When applied to substrate preheated to 150 +/- C, this material can cure in 30 s When proper
10、ly cured, this material will pass ASTM D 3359 tape adhesion test with no loss of adhesion or cohesion. For maximum adhesion, substrate should reach 120 C during cure. Note: Exposure to curing temperatures in excess of 175 C may degrade the resin and lead to premature failure of this material. 5.4 STORAGE Protect from freezing. Shelf life is six months when stored between 10 and 27 C under original seal.
