ptfe
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GENERAL USE PLASTICS PTFE WITH LOADS The advantages of filled PTFE compounds compared to uncharged resins are the properties of the filler formula, i.e. the properties of the added material. For exampLe, the wear resistance may be more than 1,000 times greaterthan that of virgin PTFE. Other advantages include improving the initial deformation resistance and flowability, increasing stiffness and dimensional stability with temperature and a slight increase in hardness. PTFE + Carbon Graphite Usually used for chemical and mechanical applications. Graphite decreases initial wear and strengthens PTFE compound. PTFE + Graphite has high thermal conductivity and high wear resistance at high loads. Recommended for piston seals and other dynamic seaLs. PTFE + Glass Fibre It is the most used filler and the filler that modifies the least the PTFE chemical and electrical properties improving the mechanical characteristics in a unique way. It slightly increases the coefficient of friction as it considerably increases the wear resistance and at high loads. Recommended for structural parts and sealing balls. PTFE + Bronze Bronze fillers improve wear resistance characteristics of parts subjected to abrasion, combining Low coefficient of friction with resistance to high Loads. Using high percentages, we can obtain a product with good thermal conductivity and higher mechanical properties than the other compounds. This material is not recommended in eLectricaL applications because it is not an electrical insulator. Recommended for sliding and rotating applications. PTFE + Molybdenum Disulphide It has the same resistance to high loads but uses MoS2 as a lubricant. Thanks to this fiLler, PTFE hardness, stiffness and wear resistance are considerably improved and its influence on thermal and eLectricaL properties is almost non-existent. SHORE HARDNESS TENSILE STRENGTH (23°C) DEFORMATION TO RUTURE (23°C) MODULUS OF ELASTICITY COMPRESSIVE STRESS AT 1% DEFORMATION (23°C) COEFFICIENT OF THERMAL EXPANSION (20-150°C) COEFFICIENT OF THERMAL EXPANSION (150-260°C) THERMAL CONDUCTIVITY (23°C) DEFORMATION AFTER 24H AT 23°C - 4 DEFORMATION AFTER 24H AT 23°C -15 PV LIMIT 3 m/min PV LIMIT 30 m/min PV LIMIT 300 m/min COEFFICIENT OF STATIC STROKE WEAR

THERMAL PROPERTIES THERMCAL CONDUCTIVITY cal/s/cm/°C 15x10-fl COEFF. OF LINEAR THERMAL EXPANSION (23°C - 260°C) °C 12 x10 s MECHANICAL PROPERTIES TENSILE 5TREN0TH RUPTURE DEFORMATION SHORE HARDNESS DYNAMIC FRICTION COEFFICIENT FLUENCY PRESSURE/VELOCITY FACTOR - P.V. (3.5m/min) ELECTRICAL PROPERTIES VOLUME RESISTIVITY SURFACE RESISTIVITY