Biological compound enzyme preparation for softening wood fibers and preparation method thereof

Abstract

The invention relates to a biological compound enzyme preparation for softening wood fibers. The biological compound enzyme preparation is mainly added in a papermaking pulping stage and consists of neutral endo-pectate lyase, neutral xylanase, neutral cellulase, D-mannase and laccase. The biological compound enzyme preparation comprises the following components in percentage by mass: 35%-60% of neutral endo-pectate lyase, 30%-50% of neutral cellulase, 10%-20% of neutral xylanase, 10%-15% of D-mannase and 5%-15% of laccase. By adopting the technical scheme, phenomena of high pulping power consumption, rough hand feeling, easy foaming and layering of paper and the like caused by poor moistening and swelling effects of the pulping enzyme in the traditional process are overcome, and the biological compound enzyme preparationis suitable for industrial application. In addition, the invention further provides a preparation method of a biological compound enzyme preparation for softening wood fibers.

Description

technical field [0001] The invention belongs to the technical field of papermaking, in particular to a biological composite enzyme preparation for softening wood fiber and a preparation method thereof. Background technique [0002] The application of enzyme preparation products in the domestic market for plant fiber modification has long been involved in enterprises, mainly foreign large enzyme preparation companies such as Novozymes, Genencor, and Buckman. And domestic enterprises mainly act as agents of foreign products. The corresponding products are involved in domestic paper pulping, textile degumming and textile refining technology and other fields. The above-mentioned papermaking beating, textile degumming, and textile refining industries have very little application of existing enzyme products. For example, the application of beating enzymes is less than 1% of the total raw pulp beating market share of the entire industry, and the application of textile degumming en...

AI Technical Summary

Problems solved by technology

However, its disadvantages are high power consumption for refining, high cost of mechanical separation, large fiber damage, high pulp consumption, and large loss of fine fibers.

[0004] In order to solve the technical problem of low wood fiber swelling ability in the traditional beating process, some influential products currently used in the market are mainly wood fiber softening enzymes, cellulase, etc., and their main components are single cellulase. The mechanism of action is to selectively degrade the water-soluble colloidal substances and useless fine fibers in the pulp raw materials by cellulase, so as to improve the removal of free water in the wire part and press part of the pulp, so as to improve the drainage effect Purpose

However, it also has obvious negative effects in the application, which are mainly reflected in the following aspects: first, holes may appear during the application process, which increases the number of paper machine breaks; second, when the pulp is stored for a long time, the enzyme reaction Prolonged time will cause a significant decrease in the wet weight of the pulp, a weakening of the pulp binding force, a significant decrease in the tensile force of the paper, and a significant increase in paper machine breaks and rewinding ends, thereby affecting the operation of the paper machine; Coarse texture and rough hand feeling affect the product quality

Therefore, there will be a great risk in the use of manufacturers, and it will also be accompanied by the possibility of product quality decline, so there are still many problems in its wide application, resulting in the reality of selective use by enterprises

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