The Study And Practice Of Improving The Properties Of Waste Paper Pulp For Plaster Board Protection Paper

Gypsum board protection paper referred to as "protective paper",production of gypsum board,cover the gypsum core material on both sides,and can firmly together with gypsum core materials,protect the gypsum core material.Divided into cardboard board on the back and front.On the back of the cardboard is refers to the production of gypsum board when gypsum slurry are covered with the above board(usually called molding paper),positive board bearing the gypsum slurry is refers to the production of gypsum board when the cardboard(usually called under the molding of paper),multi-purpose waste newsprint deinked pulp of dry noodles.Taihe paper production under the protective paper paper mainly is based on the local countries waste newspapers and 9# beauty waste newspaper.According to different product requirements shall be carried out in accordance with the proportion ratio and pulp,deinking and manufacture paper with pulp.The project master thesis introduces in detail the purpose and characteristics of plasterboard protective paper and the current situation of the development.Closely with taishan gypsum co,LTD.Taihe paper # 2 machine protective paper production,removing ink from the deinked pulp,the improvement of whiteness and adhesive content control,etc to improve the performance of protective paper with paper pulp research and practice.Through enzyme compared with the experiments of chemical deinking agent,it is concluded that: the use of chemical deinking agent in a certain extent,improve the whiteness of paper,improve the appearance of the protective paper as well as the quality of the product.In the normal production process,will meet the deinking effect is not ideal,paper whiteness is weak,this requests us in the usual production process more optimize the system,through continuous experiment of deinking effect is the best condition.In the deinking process to control the concentration of the system,and control the various process parameters,so as to ensure the appearance quality of paper.In the usual production process often encounter have wax paper and glue stick,affect the appearance of the paper.In this paper,through extracting dryer adhesive content of inorganic,organic and FTIR analysis,it is concluded that the poor quality of which meets in the production process of waste paper,sticky powder content in the pulp,paper machine broken paper more frequent situations by adding adhesive content control agent is required to reduce the residual adhesive content in slurry,thus improve the strength of the paper to reduce paper machine paper number.