Strength is one of the important physical characteristics of the paper that primarily determines its usage and applications in the industry. It tells about the highest force or stress, the paper can bear without breakage or tear. The strength of the paper is based on the bonding of the fibres, the drying process, and the composition.
Core compression strength is another strength parameter that determines the tensile/collapsing strength of a paper. The only difference lies in the formation of the paper. The products can be a core pipe, a paper tube, or a core cone. Tested using a core compression tester, the collapsing or core strength of the paper is the horizontal load-bearing capacity of paper tubes. This load-bearing strength depends on multiple factors, such as,
Bonding strength
Formation of paper
Length of the fibre
Arrangement of the fibre
Fillers added.
In the following section, we will throw light on these factors.
Factors Affecting The Pape’s Core Compression Strength
Bonding strength
Just like a paper’s tensile strength, a core cone’s compression strength is influenced significantly by the bonding strength. The bonding strength is the bonding between the fibres achieved during the beating process and as the cone is manufactured and dried. Basically, this strength is developed based on mechanical and chemical processes. If these processes are done as per the standards, they result in a strong core cone, that has a cohesive structure and withstands tearing to a good extent.
Formation of paper
As mentioned in the above point, as the paper cone goes through formation, the bonding strength keeps increasing. As a result, the core compression strength also increases. If the bonding strength isn’t enough or the paper formation is low quality, the core cone will get a lower compression strength, when tested on a core compression tester.
Length & Orientation of Fibres
Both the length and the arrangement of the fibres make strength when it comes to determining the core compressive strength. While longer fibre strands have high bonding between the fibres, shorter ones don’t. Hence, the overall strength and firmness of the paper are affected.
Besides, the orientation or the direction of the cellulose fibres in the core also influences the core compression strength.
Fillers, added to the Fibres
Fillers play a crucial role here. Products like calcium, kaolin, etc. are fillers, the quality, and quantity of which influence the pulp’s strength. If these fillers are added to large content, the paper will achieve a lower compression strength and vice versa.
Conclusion
Paper making machine manufacturers like UEC specialise in instruments that evaluate the different physical properties of paper by performing crucial tests. A core compression tester is among the significant instruments, core pipe manufacturers sought after. If you’re looking to invest in a compression tester or any paper making machine, visit the official website of UEC.