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Carbon Fiber / Graphite Fibers / Ceramic-Carbon Composites

Since the inception of the Carbon Fiber Industry, Harper has helped pitch and pan-based fiber manufacturers achieve new and greater heights.

Harper pioneered the design and development of commercial, ultrahigh temperature graphite element furnaces in the early 1940's.  by the 1970's, Harper had gained a worldwide reputation for graphite element technology and was uniquely prepared to meet the challenges of designing and producing furnaces for large scale production of LT (low tensile), HT (high tensile), and HM (high modulus) carbon fibers.

Because of the high temperatures associated with graphite element furnaces, some systems have a reputation for consuming resources.  However, Harper's extensive experience has allowed it to incorporate material and design features which result in the conservation of energy, cooling water, and protective atmospheres.  Harper equipment is exceptionally energy efficient.

Similarly, Harper has addressed the susceptibility of carbon and graphite materials to oxidation.  Harper furnaces circumvent this problem through an extraordinary gas-tight design.  The superior sealing system is further enhanced by Harper's unique purge chambers, which allow fibers to continually enter and exit an open ended furnace without admitting air (oxygen) into the reaction chamber.

Advanced technology has made us the dominant supplier of graphite-element and other furnaces to the carbon fiber industry worldwide.  We are committed to continued innovation and cooperation with procedures to meet the needs of challenging new applications.