Flame-retardant fiber board and manufacturing method thereof

Abstract

The invention relates to a flame-retardant fiber board and a manufacturing method thereof. The flame-retardant fiber board is prepared from the following raw materials in portion by weight: 80 to 120 portions of fiber, 80 to 120 portions of magnesia, 80 to 200 portions of water solution of magnesium sulfate, 5 to 30 portions of active silica, 0.5 to 2 portions of organosilicon waterproof agent, and 0.5 to 1.5 portions of plasticizer. The manufacturing method comprises the steps: 1) preparing the fiber, namely cleaning and drying crop straws, wood branches or wood processing residual materials, and then obtaining the fiber through the crushing by a crushing machine; 2) preparing an inorganic adhesive, namely mixing the magnesia, the water solution of the magnesium sulfate, the active silica, the organosilicon waterproof agent and the plasticizer, and stirring the mixture to obtain the inorganic adhesive; 3) mixing the fiber and the inorganic adhesive prepared through the step 1 and the step 2, stirring the mixture, and paving the mixture after the screening by a screening machine; 4) paving a reinforcing network on the upper and lower surfaces of a paved slab; and 5) finally performing hot pressing on the board paved with the reinforcing network for 10 to 25 minutes at a temperature of between 100 and 110 DEG C at a pressure of between 12 and 30MPa to obtain the flame-retardant fiber board. The flame-retardant fiber board has broad application field.

Description

technical field [0001] The invention relates to a composite board and a manufacturing method, in particular to a flame-resistant fiber board made by using crop straw fibers, wood fibers and inorganic adhesives by hot pressing and a manufacturing method thereof. Background technique [0002] 1. At present, wood-based panels, such as blockboards, density boards, fiberboards, particleboards, laminated boards, and other traditional wood-based panels that use logs, wood tips, and wood sheets as the main raw materials, have the following defects: 1) Resource defects: raw material resources are greatly affected. Large restrictions require the consumption of a large amount of wood and large resource consumption, among which the production of plywood is restricted in countries; 2) Environmental defects: the adhesives used in the production of boards are mainly resinous organic adhesives (such as urea-formaldehyde resin glue), which contain formaldehyde, benzene, toluene , Xylene and ...

AI Technical Summary

Problems solved by technology

[0002] 1. At present, wood-based panels, such as blockboards, density boards, fiberboards, particleboards, laminated boards, and other traditional wood-based panels that use logs, wood tips, and wood sheets as the main raw materials, have the following defects: 1) Resource defects: raw material resources are greatly affected. Large restrictions require the consumption of a large amount of wood and large resource consumption, among which the production of plywood is restricted in countries; 2) Environmental defects: the adhesives used in the production of boards are mainly resinous organic adhesives (such as urea-formaldehyde resin glue), which contain formaldehyde, benzene, toluene , xylene and other toxic volatiles; 3) performance defects: all wooden boards are not fireproof or waterproof without treatment

2. Inorganic wood-based panels based on inorganic cementitious materials such as Portland cement, low-alkali cement, and magnesite cement have the following defects: 1) Environmental protection defects: some boards contain asbestos, which is harmful to the human body, such as cement asbestos boards, Calcium silicon board

The country has expressly banned the use of asbestos in the production of building materials; 2) Performance defects: At present, most inorganic man-made panels have a large proportion and are inconvenient to carry. The panels are rigid, not impact-resistant, fragile, and easy to break

However, the performance of magnesite board is unstable, easy to be halogenated and damp; 3) Processing defects: most inorganic wood-based panels cannot be directly pasted with wallpaper, aluminum-plastic board, decorative fireproof board, veneer, PVC, spray paint or latex paint, etc. Woodworking tools are directly cut and processed, and the nail holding power is poor, and its processing performance is far behind that of wood panels.

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