THE JANUS CONCEPT - A COMPLETELY NEW CALENDERING TECHNOLOGY TO MEET FUTURE MARKET REQUIREMENTS

At present, high-quality paper finishes are obtained by the exclusive use of supercalenders and softcalenders. Experience has shown that bot h calendering processes will not always be able to meet the future dua l requirements of increased efficiency and improved paper finish. The answer to these challenges is the development of a new technology, a s ynergy of the superercalender and softcalender processes, called the ' 'Janus Concept.'' This paper outlines the rationale behind this new de velopment, as well as the technical characteristics, providing a succe ssful on-line integration, regardless of production speed. Laboratory results are included to demonstrate that the Janus Concept enables a h igh-quality supercalender finish even at paper machine or coating mach ine speeds.