Teflon fluorocarbon resin

DMAC is a good solvent for many resins therefore, flange gaskets and pump and valve packing should be limited to Teflon fluorocarbon resins. 

Teflon TFE-Fluorocarbon Resins Molding Techniques, 2nd ed., buUetia, E.I. du Pont de Nemours Co., Inc., Wilmington, Del., 1966. 

Table 4. Teflon PFA Fluorocarbon Resin Thrust-Bearing Wear-Test Results ...

Teflon Immersion Coils Immersion coils made of Teflon fluorocarbon resin are available with 2.5-mm (0.10-in) ID tubes to... 

Shock-resistant, flexible hose (Figure 40.32) assemblies are required to absorb the movements of mounted equipment under both normal operating conditions and extreme conditions. They are also used for their noiseattenuating properties and to connect moving parts of certain equipment. The two basic hose types are synthetic rubber and polytetrafluoroethylene (PTFE), such as DuPont s Teflon fluorocarbon resin. 

Principles and Characteristics In the Parr bomb extraction technique (see also Section 8.2.1.2), a Teflon-tetrafluoroethylene fluorocarbon resin lined vessel is used for sample containment. A sample (typically 1 g) is heated in a small volume of solvent at T, t, p of choice. 

Teflon Fluorocarbon Resin, for instance was discovered in 1938. The substance was produced on a small scale throughout World War II for defense applications. It became commercially available in 1948, but did not gain public recognition until 1961 when it was used as a lining for nonstick frying pans. Today, Teflon coats chemical process equipment, insulates electrical equipment, coats the blades of tools, protects buildings from earthquakes and is used as a material in... 

Teflon is a registered trademark of E.I. DuPont de Nemours and Company for fluorocarbon resin. 

Diaphragm Valves These valves are limited to pressures of proximately 50 Ibf/in (Fig. 10-154). The fabric-reinforced diaphragms may be made from natural rubber, from a synthetic rubber, or from natural or synthetic rubbers faced with Teflon fluorocarbon resin. The simple shape of the body makes lining it economical. Elastomers have shorter lives as diaphragms than as linings because of... 

Fluorocarbon Resins. This term includes polytetrafluoroethylene, polymers of chloro-trifluoroethylene (fluorothene), vinylidene fluoride (H2C CF2)j hexafluoropropylene (C3Ffl) and similar compds. These polymers are thermoplastic, inert to chemicals and oxidation. They have high heat stability, retain their useful props at both extremely low and high temps, have high electrical resistance to moisture. The materials are available as re sins, powders, and dispersions, and as films, sheets, tubes, rods and tapes. Some of them are rubber-like. Commercially available varieties are Kel-F , Teflon , Fluorel , Aclar and "Halon ... 

Source Teflon Fluorocarbon Resins, Mechanical Design Data, 2nd ed. DuPont (1965). 

Mallouk, R. S., Thompson, W. B.. Teflon 100X Perfluorocarbon Resin, A New Melt-Extrudable Fluorocarbon Resin, Soc. Plastics Engrs., 14th Annual National Technical Conference, Vol. 4, p. 782, 1958. 

The purity of distilled water is usually specified on the basis of low electrical conductivity rather than organic contaminants. In distilled water systems, it is therefore common practice to use a variety of plastics or rubber materials, but from the previous experience it was apparent that these materials should be eliminated. When it is necessary to use similar material such as in gaskets, it has been found that Teflon, a fluorocarbon resin, is satisfactory. 

SPE can be prepared by dissolving the polymer and an alkali metal salt in a mutual solvent and then evaporating the solution on a teflon fluorocarbon resin plate in a dry atmosphere. SPE films are obtained by casting the solution and heating at relatively low temperatures ( 150°C) under vacuum. The existence of a polymer/salt complex, however, is no guarantee that the material will be a good ionic conductor. 

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