Manufacturing method of environment-friendly antiflaming middle and high density fiberboard

Abstract

The invention relates to a manufacturing method of an environment-friendly antiflaming middle and high density fibreboard, solving the problem of high fibreboard production cost and poor fire resistance and environmental protection in the prior art. The invention comprises the following technical steps: hot grinding wooden or non-wooden materials into fibre; applying expansion N-P fire retardant of which the solid content is 35-60% and the pH value is 7-8 for fire retardant treatment, wherein the application amount of the fire retardant accounts for 10-15 wt% of absolute dry fibre; applying urea resin, waterproof agent and curing agent, wherein the urea resin application amount accounts for 10-14 wt% of the absolute dry fibre, the waterproof agent application amount accounts for 1-3 wt% of the absolute dry fibre, and the curing agent application amount accounts for 0.5-2 wt% of urea resin; then, drying, paving, prepressing, hot-pressing, cutting edges, sanding, separating and the like to obtain the fibreboard after inspection. The invention has simple production technology and low cost, the fibreboard not only has favorable physical-mechanical property but also has antiflaming and environment-friendly characteristics.

Description

technical field [0001] The invention belongs to the fiberboard manufacturing technology in the wood-based panel industry, and in particular relates to an environment-friendly flame-retardant medium and high-density fiberboard manufacturing method. technical background [0002] Medium and high-density fiberboard is a high-grade wooden board, which can be widely used in furniture manufacturing, building interior decoration, vehicle and ship partitions, and audio and musical instrument materials. However, medium and high-density fiberboard is still a kind of wood material, mainly composed of organic combustibles, which is a combustible material, which is easy to cause fire and has potential safety hazards. Existing surveys show that formaldehyde ranks first among the main pollutants in the indoor environment. Formaldehyde has carcinogenic effects on the human body. However, general medium and high-density fiberboard products release a large amount of formaldehyde, which is not ...

AI Technical Summary

Problems solved by technology

However, medium and high-density fiberboard is still a kind of wood material, mainly composed of organic combustibles, which is a combustible material, which is easy to cause fire and has potential safety hazards.

Existing surveys show that formaldehyde ranks first among the main pollutants in the indoor environment. Formaldehyde has carcinogenic effects on the human body. However, general medium and high-density fiberboard products release a large amount of formaldehyde, which is not conducive to human health.

Another type of environmentally friendly flame-retardant medium and high-density fiberboard mainly has the following problems: 1. Most fiberboards are made of flame-retardant materials in the later stage, and there are basically no medium- and high-density fiberboard products with overall flame-retardant treatment; 2. Conventional flame retardants are prone to decrease the physical and mechanical properties of fiberboard after flame-retardant treatment due to moisture absorption or other reasons, and the price of flame retardants is high, and the production process is complicated; 3. The commonly used adhesive for fiberboard production is urea-formaldehyde resin. The cost is low and the gluing performance is good, but its formaldehyde molar ratio is high. Although the processed board has good mechanical properties, the amount of formaldehyde released is easy to exceed the standard.

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