材料词典 - J

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Graphite produced in an extrusion process. In contrast to isostatically molded graphite, extruded graphite has lower strength but higher thermal conductivity. Extruded graphite is primarily used in electronics, industrial and high-temperature applications.

Details on properties, manufacturing, and typical applications of isostatic graphite can be found under SIGRAFINE® Fine grain graphite

由聚丙烯腈制成的合成纤维,是生产高性能碳纤维的原材料。

Polytetrafluoroethylene (PTFE) is the fully fluorinated polymer of tetrafluoroethylene monomers with a very high molecular weight.  It is produced as powder in either a suspension (S-PTFE) or an emulsion (E-PTFE) technology. Due to the extremely long molecular chains, it is processed into a semifinished product by compression with a following sintering step that melts the micro particles together. PTFE composes only of carbon and fluorine with an extremely strong bonding. This gives the polymer a unique stability versus heat aging and chemical attack.  

Owing to its almost universal chemical resistance at usage temperatures up to 260 °C, PTFE is a preferred construction and lining material for the heavy-duty corrosion protection of equipment, pipework, and fittings used in the chemical industry. Furthermore it offers excellent dielectric properties and very high flexural fatigue resistance, which makes it suitable for flexible parts like expansion joints, flexible hoses, and tubes as well as electrical insulators.