改善纸机性能、降低能耗 辊子橡胶覆层的最新发展

Recent advances in rubber roll covers for improved paper machine performance and reduced energy requirements

人造橡胶应用于纸机辊子覆层已经有100多年的历史了。由于该材料的不断改进,使得其覆层具有更好的耐磨性、韧性、耐化学腐蚀性能以及表面性能。如今,压榨辊即使在较高的压力下也能达到前所未有的寿命。由于施胶辊的橡胶表面性能得到改善,在施胶过程中能够提供更加均匀的施胶。扬克缸压榨托辊经过了优化,具有了耐老化、抗硬化的性能,同时拥有优秀的韧性和耐磨性能。新的涂布背辊设计使得辊子有更好的抗冲击、抗撕裂性能及耐裂纹性的同时,还具有更好的硬度稳定性。这些辊子中的大部分能够在没有冷却水的情况下运行,这种既可以节约能源又保护水环境的绿色生产方法给纸厂带来极为可观的经济效益。另外,这种先进材料延长覆层的研磨周期和使用寿命,同时提高抄造效率和成品质量。

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 rolls 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.