High-opacity mixed pulp and cultural paper prepared from the same

Abstract

The weight of high-opacity straw pulp accounts 20 to 98 percent of the weight of mixed pulp, and preferably, the high-opacity straw pulp has the mixed pulp content between 60 and 95 percent. The invention provides cultural paper with the whiteness between 45 and 70 percent, the preferable whiteness is between 50 and 65 percent, and the opacity is larger than 90 percent. Because unbleached straw pulp is mixed in the mixed pulp, the consumption of wood pulp and the like is reduced, the process avoids the environment pollution caused by bleaching agents and generated harmful materials to human bodies in the bleaching process, the prepared paper product nearly contains no harmful material to human bodies, the cost of paper production is greatly reduced, the opacity of the paper is high, the aging degree of the whiteness is also greatly reduced, and the paper is not easy to become yellow.

Description

technical field [0001] The invention relates to a mixed pulp for papermaking, in particular to a mixed pulp with high opacity and paper made from the mixed pulp. Background technique [0002] In the raw material structure of my country's papermaking industry, raw materials mainly include wood pulp, waste paper pulp and non-wood pulp. With the rapid expansion of production capacity driven by domestic paper demand, the demand for raw materials has grown rapidly. However, due to the long-term rigid scarcity of domestic timber resources, the price of timber continues to rise, and the output of wood pulp is far from meeting the needs of the paper industry. At the same time, because domestic waste paper recycling has not yet reached a large scale and the quality is not as good as the waste paper produced and recycled from raw wood pulp. Therefore, the current paper industry advocates the use of non-wood pulp instead of wood pulp to reduce the cost of paper products and meet the d...

AI Technical Summary

Problems solved by technology

Although the opacity of the paper is relatively good, the wood pulp used is bleached with hydrogen peroxide. Due to the high selectivity of oxygen bleaching, there will be certain damage to the fiber, and due to the long growth cycle of wood, the source of wood pulp is relatively scarce. The cost is greatly increased, limiting its use

[0010] To sum up, in the prior art, in order to improve the opacity of the paper, by adjusting the type of fiber in the pulp, the preparation process, adding auxiliary materials and other factors, in the selection of the pulp, the bleached pulp or other The wood pulp prepared by the method, because the price of wood pulp is high, has improved the paper-making cost of paper, in preparation process, improves its opacity by adjusting beating process, has increased the responsibility of process, although adding auxiliary material is to paper's Opacity plays a positive role, but at the same time, it may also have a negative impact on other properties of the paper, and also increase the cost of raw materials. The complex content of the paper may also cause adverse effects such as accelerated aging, so it is best to start from the selection of the initial slurry. To improve, can better solve the above problems

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