杜邦PTFE 7A X--Teflon ® PTFE 7A X is a white powder with smallparticle size and high bulk density. The small particle size ofTeflon ® PTFE 7A X helps to minimize voids even at relatively lowmolding pressures. High bulk density increases the size of moldingspossible from a given mold or press opening. Teflon ® PTFE 7A X ispreferred for large moldings, such as billets, re optimummechanical and electrical properties. It is also used in a mixturewith fillers when they are added to modify the mechanicalproperties of moldings. Properly processed products made from neatTeflon ®PTFE 7A X provide the superior properties typical of thefluoroplastic resins: retention of properties after service at 260°C (500 °F), useful properties at -240 °C (-400 °F), chemicalinertness to nearly all industrial chemicals and solvents, and lowfriction and anti-stick surfaces. Dielectric properties areoutstanding and stable with frequency and temperature. Moldedproducts have moderate stiffness and high elongation.
Teflon ® PTFE 7A X resists ignition and does not promoteflame
spread. When ignited by flame from other sources, the contributionof heat is small and with little smoke. Statements, or data,regarding behavior in a flame situation are not intended to reflecthazards presented by this or any other material when under actualfire conditions.
Typical Applications
Many end products are fabricated from moldings of Teflon ® PTFE 7AX, including skived film and sheet, gaskets, packings, mechanicalseals, bridge or pipeline bearing pads, shaft bearings, electricalinsulators, piston rings, expansion bellows, diaphragms, andchemical linings. The use of fillers provides a wide choice ofmodified mechanical properties.
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杜邦PTFE 7A X用途 |
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