Mixed pulp with high opacity, air permeability and tearing index and cultural paper prepared from the same

Abstract

The invention relates to mixed pulp with high opacity, air permeability and tearing index and paper with the mixed pulp. The air permeability of the high-efficient straw pulp is between 300 and 6500 ml / min, the opacity is between 88 to 100 percent, and the tearing index is between 3.5 and 6 mN*m<2> / g; preferably, the air permeability is between 500 and 5500 ml / min, the opacity is between 90 and 99 percent, and the tearing index is between 4.6 and 5.6 mN*m<2> / g; more preferably, the air permeability is between 1000 and 5000 ml / min, the opacity is between 94 and 98 percent, and the tearing index is between 4.8 and 5.4 mN*m<2> / g. The mixed pulp provided by the invention has high opacity, air permeability and tearing index, so the opacity of the paper with the mixed pulp is improved, and the stiffness and the like of the paper are improved. Because of the improvement of the air permeability, the papermaking speed is greatly improved.

Description

technical field [0001] The invention relates to the field of papermaking, in particular to a high opacity, air permeability and tear index mixed pulp and cultural paper prepared therefrom. Background technique [0002] The shortage of raw materials is one of the three major problems faced by the world's paper industry, and this problem is particularly prominent in my country's paper industry. The development of non-wood fiber raw materials for pulping and papermaking is one of the effective ways for my country's paper industry to solve the shortage of raw materials and reduce environmental pollution. [0003] However, at the same time, China faces the problem of straw disposal every year. China is a large planting country of grass crops such as wheat and rice, and a large amount of straw is produced every harvest season. At present, most people burn straw and put it into the river to reduce the pressure of a large amount of straw piles. [0004] The harm caused by straw b...

AI Technical Summary

Problems solved by technology

This severely limits the improvement of production efficiency and increases the production cost

[0010] In addition, the tear strength of straw pulp is also worse than that of wood pulp. As mentioned in "Reevaluation of Straw Papermaking" ("Shanghai Paper" 1974, No. 5, p38), straw pulp can be compared with hardwood pulp, because the fiber Both are short, so the tear strength is low, which limits the application of straw pulp

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