It is good business to pass on knowledge gained through years of experience. On Durex Industries’ website, visitors will find descriptions of the types of heaters that the company manufactures at its Cary, Ill., facilities.

In general, according to Durex, the term “flexible heater” is a generic name for several types of industrial heating technologies designed to conform to a surface that is being heated. The most common types are silicone rubber, polyimide, heat tapes and rope heaters. Durex’s specialty is silicone rubber and polyimide heaters, which provide temperature uniformity while being robust and reliable for use in industrial, medical and analytical applications.

Silicone rubber heaters are made from top and bottom layers of fiberglass-reinforced silicone elastomer insulation, which encapsulates either a wire-wound or etch-foil heater element. Silicone rubber heaters are a good solution for applications that require flexibility and tensile strength up to 428°F (220°C).

Polyimide heaters are based on a thin polymeric film encapsulating an etch-foil heater element. They are used for applications requiring lightweight heaters with high wear and corrosion resistance up to 392°F (200°C). Both silicone rubber and polyimide heaters are good solutions for heated-part assembly applications.

When Durex moved to its new process heater and systems facility last year, the company set up manufacturing cells for semiconductor thermal solutions as well as nonprocess uses such as foodservice, medical devices and analytical instrumentation. The semiconductor cell focuses on capabilities for structured-silicone mat and silicone foam-insulated heater assemblies. For more information, go to