High strength mixing pulp and cultural paper made of thereof

Abstract

The invention provides mixing pulp with a large tearing index, and the weight of the high strength straw pulp is 15-95 percent of that of the mixing pulp; the paper made of the mixing pulp, including the cultural paper, also improves a cultural paper containing non-bleached straw pulp and other pulp. Because the mixing pulp is added with the non-bleached straw pulp, the amount of wood pulp and the like is reduced, thus avoiding the environmental pollution caused by bleacher during the bleaching process in technology, and avoiding generating substance harmful to the human body; and the paper product made by the method of copying hardly contains the substance harmful to the human body, thus lowering the cost of the paper production, lowering the tearing index of the paper, and lowering the aging degree of whiteness, and the paper does not return to be yellow easily.

Description

technical field [0001] The invention relates to a mixed pulp for papermaking, in particular to a mixed pulp with a large tear index, and cultural 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 product...

AI Technical Summary

Problems solved by technology

[0008] Tianjin No.4 People's Paper in the document "Replacing Wood Pulp with Straw Pulp to Produce Greaseproof Paper", in order to reduce costs and replace wood pulp with straw pulp, use 50%, 40% or 30% bleached wheat straw pulp with 50%, 60% or 70% kraft bleached wood pulp mixed, the tear index after mixing is 4.55-5.36mNm 2 / g, the tear index after paper is about 4.7mNm 2 / g, when the proportion of bleached straw pulp reaches 40%, it plays a key role in reducing the cost of greaseproof paper, but the quality of greaseproof paper obtained by adding bleached wheat straw pulp can only reach the C level

[0009] The whiteness of the paper used in textbooks or extracurricular reading materials of the prior art is high, which easily causes visual fatigue, especially for primary and middle school students, whose eyesight is easily affected by the external environment; The use of straw pulp is expanding day by day, and the pulp used in the above-mentioned preparation of these papers, whether it is wood pulp or straw pulp, must be bleached to enhance its whiteness, or dyed into a warm color after bleaching

This method has complicated operation process and high cost, and the tearing degree of the paper produced is much lower than that of the whole wood pulp paper, which limits the application of mixed pulp mixed with bleached straw pulp

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