Bio enzyme preparation for improvement of paper forming strength of alkaline peroxide mechanical pulp (APMP) and application thereof

Abstract

The invention discloses a bio enzyme preparation for improvement of paper forming strength of alkaline peroxide mechanical pulp (APMP) and application thereof, and the bio enzyme preparation comprises the following components by weight: 0.1-5 parts of polyethylene glycol, 1-50 parts of liquid cellulase, 1-50 parts of liquid xylanase, 1-10 parts of a surface active agent and the balance of deionized water. When the bio enzyme preparation is used for the treatment of the APMP, the cellulase and xylanase in the bio enzyme preparation selectively and biologically decompose cellulose molecules and lignin molecules in APMP fiber, so that pulp fiber releases more hydroxyl for increasing the binding force bamong the fibers, and the paper forming strength of the APMP is improved.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a biological enzyme preparation for improving the paper strength of alkaline hydrogen peroxide mechanical pulp and an application thereof. Background technique [0002] Alkaline Peroxide Mechanical Pulp (Alkaline Peroxide Mechanical Pulp, APMP) is a high-yield pulping process launched by ASB in 1989 on the basis of bleached Chemi-Thermo Mechanical Pulp (BCTMP). Due to factors such as the shortage of wood resources, the pressure of environmental protection, and energy consumption, the development of pulping methods with high yield, less pollution, and low energy consumption has become an urgent problem to be solved in the pulp and paper industry. [0003] APMP pulping is a kind of wood chip in NaOH solution and H 2 o 2 The pulping method is pre-soaked in solution to soften the wood chips and then refined by a refiner. It has outstanding advantages such as ultra-high yield, g...

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Problems solved by technology

[0006] However, compared with bleached chemical pulp and secondary fiber, the paper strength of APMP pulp is far from high enough. Even a large amount of chemical wet strength agent or dry strength agent can not solve the problem in papermaking production, so it can only be partially replaced. , this is because a large amount of lignin is retained in APMP. Although the yield is high, the existence of lignin molecules seriously blocks the interaction between cellulose molecules, which will inevitably lead to the binding force between fibers while increasing the pulping yield. reduce, thereby reducing the paper strength of pulp, and the strength problem restricts the large-scale application of APMP pulping

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