A kind of technological method of increasing the strength failure period of containerboard paper

Abstract

The invention discloses a process method for improving the strength failure period of container board paper. The specific process is as follows: the pulp in the pulp tower is transported to the mixed pulp tank through the pulp pump to be fully mixed, and then sent to the paper machine by the mixed pulp pump Pulp tank, add wet strength agent in the pulp tank of the paper machine and mix evenly; transport the mixed slurry in the pulp tank of the paper machine to the mixer through the pulp pump of the paper machine, and add neutral sizing agent into the mixer at the same time After mixing evenly, the pulp is flushed by the pulp pump, and then goes through the pressure screen to remove impurities and the pulse tank to reduce the pulse, and then enters the surface layer headbox; the pulp is made into paper, and then sizing on the surface of the paper. In the present invention, a wet strength agent is added in the pulp preparation process, and the paper fibers are cross-linked into a network structure through the wet strength agent, thereby improving the dry strength and wet strength of the paper, and adding a neutral sizing agent in the paper, The core of the prepared paper is made waterproof, and the relative wet strength of the paper is further improved.

Description

technical field [0001] The invention belongs to the field of boxboard paper preparation and relates to a process method for improving the strength failure period of the boxboard paper. Background technique [0002] Normally, after the paper is completely wetted by water, its tensile and burst strength are only 10%-20% of its original dry strength, so the paper whose wet strength can maintain more than 30% of the dry strength is wet strength paper. Due to the high hygroscopicity of paper fiber, paper is easy to get wet in a humid environment, and the paper fiber in the paper is easy to disperse after getting wet, thereby reducing the strength of the paper. Therefore, in the prior art, it is usually added to the paper Wet strength agent, through the wet strength agent to achieve cross-linking polymerization between paper fibers, which can effectively prevent the dispersion of paper fibers in the environment with high humidity, and realize the improvement of paper strength, but...

AI Technical Summary

Problems solved by technology

[0002] Normally, after the paper is completely wetted by water, its tensile and burst strength are only 10%-20% of its original dry strength, so the paper whose wet strength can maintain more than 30% of the dry strength is wet strength paper. Due to the high hygroscopicity of paper fiber, paper is easy to get wet in a humid environment, and the paper fiber in the paper is easy to disperse after getting wet, thereby reducing the strength of the paper. Therefore, in the prior art, it is usually added to the paper Wet strength agent, through the wet strength agent to achieve cross-linking polymerization between paper fibers, which can effectively prevent the dispersion of paper fibers in the environment with high humidity, and realize the improvement of paper strength, but due to the existing wet strength agent and paper fiber The force between them is weaker, so that the degree of polymerization is lower, which in turn makes the wet strength increase of the paper lower

At the same time, paper is easy to absorb moisture. After absorbing moisture, the entire paper including the paper core is completely wet, and it is difficult to dry naturally, which will cause the paper to stay in a wet state for a long time, reducing its strength.