Flame retardant medium density fiberboard and manufacturing method therefor

Abstract

The invention relates to a middle intensity fiber board with fire resistance performance, which comprises a wood fiber material, glue agent and fire resistance material. The fire resistance material is swelled vermiculite grain, the adding volume of the swelled vermiculite grain is 20 to 80 per cent of the absolute dry fiber material, the adding volume of the glue agent is 15 to 20 per cent of the absolute dry fiber material. Vermiculite powder is added in the fire resistance material. The method of producing the invention is that: cut the wood material into plate; the breakage material is dissolved into wood pulp by steaming and boiling and heat milling in the heat milling machine; proceed adding and mixing glue to the wood pulp; dry in a fiber drying tube; adopt a performing machine to proceed pressing into board adobe after pavement on a paving machine; the board adobe is pressed rough adobe board; the rough adobe board forms a intensity fiber board after sawing edge and sanding, before the wood fiber enters the pavement procedure, add swelled vermiculite grain or swelled vermiculite grain, vermiculite powder fire resistance material. The invention has the advantages of lightness, little pollution to environment and low manufacturing cost.

Description

technical field [0001] The invention belongs to the technical field of medium-density fiberboard manufacturing, and in particular relates to a medium-density fiberboard with flame-retardant properties and a manufacturing method thereof. Background technique [0002] At present, ordinary medium density fiberboard is produced and manufactured, and its raw materials are mainly composed of wood fiber materials and adhesives. Most of them are organic materials and have flammable properties. -1997 criteria, generally belong to B3 level (that is, flammable level). As we all know, in recent years, the country has paid more and more attention to fire safety, and has continuously proposed higher and higher requirements for the flame retardancy of decoration and furniture materials, especially public projects, such as hotels, theaters and other decoration and furniture materials from the technical standards. Requirements, and is a mandatory requirement, the flame retardant performance...

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Problems solved by technology

Although the boards produced by this method have flame retardant properties, there are still many shortcomings, such as the need to increase the impregnation and drying sections, most of the existing flame retardants are some chemical solutions, the price is high, and the amount required is large, which makes The total cost of the board is greatly increased, and at the same time, the mechanical performance index of the board will be seriously reduced, and the impregnation and drying process of chemicals such as flame retardants will also increase the pollution to the environment.

Chinese Patent No. ZL91106445.1 once disclosed a product formula technical scheme of "vegetable fiber raw vermiculite flame-retardant composite board". The main disadvantage of the flame-retardant MDF made of this formula is that the weight of the MDF per unit area is relatively large, and the density of raw vermiculite is generally 2 to 2.3 times that of wood fibers. Uses are definitely limited

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