Brucite-fiber-reinforced high-density fiberboard and preparation method thereof

Abstract

The invention discloses a brucite-fiber-reinforced high-density fiberboard. The brucite-fiber-reinforced high-density fiberboard is characterized by being prepared from the following raw materials in parts by weight: 42-45 parts of crop straws, 30-32 parts of wood scraps, a proper amount of sodium hydroxide with a concentration of 2%, 2-2.5 parts of a silane coupling agent kh450, 66-70 parts of ethanol with a concentration of 95%, 1-2 parts of ethylene glycol monostearate, 7-8 parts of a water-based polyurethane adhesive, 1.5-2 parts of emulsion paraffin, a proper amount of water, 2-3 parts of chromium sesquioxide, 5-7 parts of brucite fibers and 1-2 parts of a pure acrylic emulsion. According to the brucite-fiber-reinforced high-density fiberboard, lots of crop straws and wood scraps are adopted to replace wood, so that lots of wood resources can be saved; as chromium sesquioxide, the brucite fibers and other ingredients are added and compounded, the product strength and acid and alkali resistance can be improved; and the prepared brucite-fiber-reinforced high-density fiberboard is excellent in water resistance, high in breaking strength and smooth in surface, and can serve as base materials of composite wood floors, door panels, partitions, packing materials and the like.

Description

technical field [0001] The invention relates to the technical field of deep processing of wood materials, in particular to a brucite fiber-reinforced high-density fiberboard and a preparation method thereof. Background technique [0002] In recent years, my country's medium and high density fiberboard industry has developed very rapidly, and the original hard fiberboard has been gradually replaced by medium and high density fiberboard. MDF enterprises are very dependent on wood raw materials. The cost of wood raw materials accounts for about 45% of the production cost. The shortage of wood raw materials has seriously affected the production of fiberboards. As far as the production requirements of medium and high density fiberboard are concerned, it is more than 10 years, the regeneration cycle of bamboo is also 3-5 years, and the regeneration cycle of crop straw is 1 year or less. From the perspective of resource utilization efficiency, crops Straw is the most beneficial. ...

AI Technical Summary

Problems solved by technology

However, the herbaceous plant fibers represented by crops are short and thin, which limits the mechanical strength of the grass fiberboard to a certain extent.

The content of organic solvent extracts from herbaceous plant stems is significantly lower than that of wood raw materials, but the main component is waxy, accompanied by a small amount of higher fatty acids, higher alcohols, etc., plus the degree of silicification of grass stems and leaf epidermal cells Very high, the waxy layer and silica content on the surface of the straw are high, which is not conducive to the infiltration of the adhesive, resulting in poor adhesion of the traditional urea-formaldehyde resin to the straw scraps

This requires that when using herbaceous plant fibers such as crop straws to manufacture high-density fiberboards, the defects of poor bonding, poor water resistance, and poor strength of traditional adhesives in the existing process must be solved.