Preparation method of composite fire retardant fiberboard

Abstract

The invention relates to a preparation method of a composite fire retardant fiberboard. The problems that the cost of fire retardant is high, and the mechanical property and the durability of a fiberboard are poor are solved effectively. The method comprises the steps that collected waste paper pulp fibers are crushed; the crushed fibers are added into a NaOH alkali liquor with the mass concentration being 2% to be soaked for 24 h, then washed by water and dissociated, alkali is completely washed away, samples are taken and dried, and the moisture content of the samples is calculated; borax accounting for 3-5% of the total dry weight of the fibers, zinc borate accounting for 3-5% of the total dry weight of the fibers, montmorillonoid accounting for 20-40% of the total dry weight of the fibers and the fibers are mixed together and are evenly mixed under mechanical stirring to form blanks; the blanks are placed in a fiberboard forming mold to be formed in a laying mode, and then the fiberboard is prepared through a cold-pressing and hot-pressing mode; and the surface of the fiberboard is coated with expansion fire retardant, and dried at the room temperature, and the fire retardant fiberboard is formed. According to the preparation method, waste materials are utilized, materials are saved, and the pollution of waste paper pulp to the environment is reduced.

Description

technical field [0001] The invention relates to a fiberboard, in particular to a method for preparing a composite flame-retardant fiberboard. Background technique [0002] At present, the methods for preparing flame-retardant fiberboard mainly include board surface coating method and additive method. The additive method, that is, the flame retardant treatment before the board is formed, is to physically blend the flame retardant with the fiber by simple mechanical stirring or spray the flame retardant on the fiber, and then press it into a board. Although this method makes the whole board have a flame retardant effect, the amount of flame retardant is large, and with the addition of flame retardant, the internal bonding strength of the board is reduced, which in turn affects the mechanical properties of the board and limits the use of the board; the coating method, That is, after the fiber is formed into a board, a flame retardant or a flame retardant coating is evenly coat...

AI Technical Summary

Problems solved by technology

[0006] In view of the above situation, in order to overcome the defects of the prior art, the purpose of the present invention is to provide a method for preparing a composite flame-retardant fiberboard, which can effectively solve the problems of high cost of flame retardants and poor mechanical properties and durability of the fiberboard.