Mixed pulp and paper with the same

Abstract

The invention relates to mixed pulp and paper with the same. The high-performance straw pulp has the loose depth of 2 to 3 cm<3>/g, preferably 2.3 to 2.8 cm<3>/g, and more preferably 2.4 to 2.6 cm<3>/g. The opacity is from 88 percent to 100 percent, preferably 90 to 99 percent, and more preferably 94 to 98 percent. The air permeability is from 300 to 6500 ml/min, preferably 500 to 5500 ml/min, and more preferably 1000 to 5000 ml/min. The mixed pulp provided by the invention has high loose depth, high opacity and high air permeability, so the loose depth, the opacity and the air permeability of the paper with the mixed pulp are improved, the stiffness and the like of the paper is improved, and the papermaking speed is greatly improved because of the improvement of the opacity.

Description

technical field [0001] The invention belongs to pulping and papermaking technology, in particular to a mixed pulp and paper containing the mixed pulp. Background technique [0002] The bulk of the paper largely determines the opacity and stiffness of the paper. The opacity of paper is one of the optical properties of paper, and it is also an important quality index for printing paper, writing paper, bond paper and some industrial technical papers. It requires high opacity. For cultural printing paper, such as newsprint , Low opacity will lead to bleed-through and print-through phenomena, which will affect the use; higher opacity can prevent bleed-through. Stiffness is directly related to the performance of the paper in the operation of printers and copiers. The stiffer the paper, the easier it will be to pass through these photocopying equipment, and there will be fewer jams. For paper producers, if high bulk, stiffness and opacity can be achieved, it is possible to use l...

AI Technical Summary

Problems solved by technology

[0010] Patent application 200410023218.5 discloses a kind of light printing paper, the slurry of this paper is Italian poplar alkaline hydrogen peroxide thermomechanical pulp APMP pulp, CTMP pulp and deinking pulp DIP, and the ratio of its slurry is 70-30: 20-50:20-0, in addition to adding auxiliary materials, the opacity of the obtained paper is greater than 82%, adding auxiliary materials helps to improve the opacity of the paper, but in the case of adding auxiliary materials, the opacity of the paper is only greater than 82% , that is, the opacity of this mixed pulp is relatively low

[0011] It can be seen that the existing technology improves the performance of its paper from a single aspect, and cannot comprehensively improve the performance of the paper.

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