Recent Advances in Rubber Roll Covers for Improved Paper Machine Performance and Reduced Energy Requirements, 2011 PaperCon Conference

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Rubber elastomers have been used to cover paper machine rolls for over 100 years. Continuous improvement of the materials has led to covers with better abrasion resistance, toughness, chemical resistance, and surface properties. Press rolls1 can now run longer than ever at higher loads. Size press rolls can provide more even coating at the size press through surface modification of the rubber. Yankee pressure rolls have been designed that do not harden and have excellent toughness and abrasion characteristics. New coater backing rolls have been designed that have improved mark and crack resistance and better hardness stability. Most of these rolls can now be run non-water cooled, which provides a measureable benefit to the papermaker through energy efficiency and provides the mill with an added “green” approach to water conservation. In addition, these material advancements have led to longer run time intervals along with improved papermaking efficiency and quality. The improved material properties will be discussed, as well as case histories illustrating the roll cover’s benefits to the papermaker.