The invention discloses a manufacturing method of novel environment-friendly kraft board paper. According to the manufacturing method,
starch in pulp is recycled, COD (
chemical oxygen demand) of
wastewater is reduced, retention and drainage agents, aluminum
sulfate and macromolecular dry strength agents are added into a flowing
system in order to solve the problems of short fibers and low pulp retention, the pulp retention and the strength of subsequent finished paper are improved,
starch and small fibers are adsorbed on long fibers, high retention of the
starch is achieved, a PH (potential of
hydrogen) valve of the pulp is adjusted to neutral by the aluminum
sulfate, anionic trash in the pulp is removed by the aid of aluminum ions, mutual combination between fibers is improved by the aidof the dry strength agents, combining capacity of the fibers is enhanced, the combining capacity of the fibers and the
physical strength of the finished paper are improved by the aid of chemical
fiber modified technique,
sizing agents are added into the pulp, so that the strength of the finished paper is improved, high ash content is kept, the
utilization rate of
waste paper is increased, the strength of the finished paper is enhanced, and the manufacturing method is applicable to production lines of most kraft board paper and has a quite wide market prospect.