Method for making paper from waste paper

Abstract

The invention further discloses a method for making paper from waste paper. The method includes the following steps of 1, pulping, wherein the waste paper is put in a 60 DEG C constant-temperature water bath tank to be heated, the concentration is adjusted to range from 4% to 6%, and the waste paper is added into a stirrer to be pulped for 40 min; 2, deinking, wherein deinking is carried out through a floatation washing method, wherein a deinking agent is a mixture of an acrylonitrile-butadiene-styrene copolymer, potassium oleate and octaphenyl polyoxyethyiene at the ratio of 3:2:1; 3, impurity removing, wherein printing ink particles in paper pulp are removed; 4, decoloring, wherein the paper pulp is bleached through white rot fungi, printing ink fine particles in the paper pulp are removed again, the PH value is controlled to range from 3 to 5, and the temperature is 40 DEG C; 5, secondary impurity removing, wherein impurities of the bleached paper pulp are removed; 6, forming, wherein wet paper web is formed through a net feeding device; 7, drying, wherein the wet paper web enters a pressure-shoe-shaped squeezing part for dewatering pressing, the squeezed wet paper web enters a drying cylinder to be dried, and the finished paper is obtained after cutting.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a method for making paper from waste paper. Background technique [0002] Relevant surveys show that the utilization rate of office copy waste paper is low, and the disposal rate is about 95%. Office copy paper is known as the "nobility" of paper, but it is far inferior to other papers in terms of reuse. The neglect of such high-quality office paper has caused far more than environmental problems. To this end, we conducted an experimental study on an integrated device for recycling office waste paper. By analyzing the usage rate and waste rate of office copy paper in the market, taking a small copy agency in an ordinary university as an example, the quality of waste paper produced due to subjective and objective problems such as copy technology is about 6kg a week, and due to the scattered locations of waste paper ( Such as scattered offices, copying agencies, etc.) and no...

AI Technical Summary

Problems solved by technology

[0005] Japan has developed office waste paper utilization machines that are expensive, large in size, and high in energy consumption, but they are not popular, such as the "white sheep" that makes toilet paper, and the blue light dry paper deinking machine made with special ink, etc. There is no small-scale integrated equipment for recycling office copy waste paper into office paper;

[0006] The United States and other European countries have promulgated corresponding laws and regulations on waste paper recycling, and implemented strict classification of waste paper. There are more than 50 kinds of standards. For various paper products, efficient recycling methods are adopted, and the recycling rate of waste paper has reached Up to about 93%, there is no related small mechanical invention