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Many plastic molding applications require precise temperature control. Localized heating with electric heating elements often does not provide the user with enough precision to guarantee product quality. Therefore, the use of heat transfer fluids has become the standard in the industry. Reservoirs, molding machines and extruders can all be heated to exact temperatures by circulating heat transfer fluid at a controlled rate. The elevated temperatures required and potential problems with corrosion usually prohibit the use of steam because of the relatively small flow passages within the equipment used in the industry. Since Therminol heat transfer fluids are non-corrosive and thermally stable when used within their recommended operating temperature ranges, they can be used for nearly all plastic molding applications.
The processing temperature required usually determines which Therminol heat transfer fluid is preferred for a particular molding application. Therminol 55 can provide excellent performance up to 290° C (550°F). Therminol 66 has a maximum recommended bulk operating temperature of 345°C (650°F) and will last many years at or below this temperature when operated correctly. Both Therminol 55 and Therminol 66 liquid phase heat transfer fluids are synthetic based heat transfer fluids. Synthetics are preferred over mineral oil based fluids because of their resistance to solids formation. This characteristic will help provide long-term trouble-free performance in your heat transfer fluid system when Therminol fluids are specified.
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