What is paper making rubber roller?

I don't know if you are familiar with paper making rubber rollers, which are commonly used in paper machines. A long web paper machine usually has 70-80 rubber rollers of different sizes. Let me introduce the paper roller to you in detail.
Paper making rubber rollers can be divided into smooth rollers (flat rollers without patterns on the surface), grooved rollers (grooves on the coating surface), threaded rollers (threaded grooves on the coating surface), vacuum rollers, movable curved rollers (hollow curved rollers), medium high rollers, etc. They are used for squeezing, pressing, and calendering different parts of paper machines. Usually, various types of SR (such as PU) are also used for production.
Paper making rubber rollers are large thick walled rubber rollers used in various parts of paper machines. According to different functions, it can be divided into pressure rollers and various auxiliary rollers driven by pressure rollers. The squeezing rubber roller should be able to withstand higher pressure and serve as a driving force for other additional rubber rollers, with high hardness ranging from 85 to 95 Shore hardness. When the upper and lower rollers press the slurry, the pressure applied by the upper roller (cast iron roller core, coated with brass or hard rubber) is high, and the moisture is squeezed out. The lower roller (i.e. pressure roller) provides support, and some auxiliary rollers driven by the pressure roller include chest rollers (supporting copper mesh), platform rollers (also known as dewatering rollers, supporting copper mesh), scraper rollers, brush rollers, etc. The rubber layer of papermaking rubber rollers should have good elasticity, compression resistance, flexibility, and thermal conductivity. The tolerance of hardness should be within the allowable range, otherwise it will cause uneven drying of pulp and affect the quality of paper. Generally, the Shore hardness ranges from 40 ° to 100 °, with an allowable tolerance of ± 2 ° to ± 4 °.
After the above introduction, everyone should have a rough understanding of paper rollers, and this issue's news is about these contents. If you want to learn more about it, please feel free to call for consultation.
Editor: Chihiro