Method for manufacturing ultra-low formaldehyde emission medium-to-high density fiberboard

The invention discloses a method for manufacturing an ultra-low formaldehyde emission medium-to-high density fiberboard, and relates to the technical field of chemical engineering. The method comprises the steps of timber chipping, washing, stewing, softening, grinding the chipped timber into a fiber in a hot mode, adding a mixed curing agent of a super E0 tackiness agent, urea and ammonium chloride, drying, winnowing, paving and forming, hot-pressing, cross sawing, cooling, sanding, edge cutting and identifying and packaging a sawn stock board according to the demand. In the process of manufacturing the fiberboard, the mixed curing agent of the super E0 tackiness agent, the urea and the ammonium chloride is added, the formaldehyde emission conforms to the standard, and ammonia smoking can be carried out without additionally installing equipment so that the problems that investment is increased and power is consumed cannot happen; the problems that the physical properties of the fiberboard are poor and the appearance of the fiberboard is defective do not exist, and ammonia gas and other pungent smells cannot be produced.