Spray enhancement - special effects to increase the print strength of newsprint

In recent years, domestic newsprint paper, especially deinking newsprint, has been difficult to adapt to the rapid popularization of high-speed offset color printing on paper surface strength requirements. Lint and powder dropping are common when printing plates and paper are stripped, affecting domestic production. Newsprint application. For this reason, many paper mills have tried to solve this problem by using commercial pulp or pulp internal sizing methods, but they are difficult to make progress because of poor results.

Tianjin Jinxing Paper Co., Ltd. has the courage to innovate and has taken a new paper "spray enhancement" road. The groundbreaking solution to this problem. This technology differs significantly from the "internal sizing" and traditional "surface sizing" and "surface spray enhancement" technologies. Conventional sizing is aimed at improving the paper's resistance to water infiltration, and paper and excessive water repellency cause wet repelling of the ink, which in turn creates printing obstacles. This technology is based on the fact that the dampening water is transferred to the paper surface several times during color printing of the newsprint offset printing plate to increase the strength of the paper wet weave and use it as a breakthrough to form a net-like waterproof film on the surface of the paper by spraying. Obviously, the present technology does not increase the sizing degree of the paper, and does not impede the infiltration and penetration of water, but rather makes the paper surface fibers form an integral whole with a certain strength, thereby significantly reducing the hydrogen bonding force between the dampening water and the fibers. The destruction.

This technical method applies a limited reinforcing agent to the paper surface. The amount of spray can be precisely controlled to between 0.05 and 0.20 g/m2 per side. It is of course possible to increase or decrease the amount of spray as needed. This technical method effectively overcomes the interference between the internal sizing agent and the system, and achieves excellent results with a very small amount of spray. Now this technology has been incorporated into the Jinxing Paper Company's production process. Newsprint is 100% spray-enhanced. The process has been stable for several months since it was put into operation. It has completely eliminated the stubborn disease of newsprint and hair loss. The tensile strength of paper also has Significantly improved.

This technology is also suitable for the needs of other printing papers to increase the printing strength. It also has an immediate effect on solving the problem of weak bond strength between the paper layers.

Source: Chinese Paper Network Author: Lee shipped