Straw added fireproof high-density fiberboard and preparation method thereof

Abstract

The invention discloses a straw added fireproof high-density fiberboard. The straw added fireproof high-density fiberboard is characterized by being composed of, by weight, 42-45 parts of crop straw, an appropriate amount of sodium hydroxide with the concentration being 2%, an appropriate amount of water, 1.5-2 parts of a silane coupling agent kh450, 66-70 parts of ethyl alcohol with the concentration being 95%, 30-32 parts of wood scraps, 4-6 parts of aluminum hydroxide, 2-3 parts of zinc borate, 7-8 parts of waterborne polyurethane adhesives, 1.5-2 parts of emulsion paraffin and 1-2 parts of pure acrylic emulsion. According to the straw added fireproof high-density fiberboard, while fibers are modified, the aluminum hydroxide, the zinc borate and other flame retardant components are added and attached to the surfaces of the fibers and in gaps, and the fireproof performance of the product is greatly improved. The straw added fireproof high-density fiberboard is simple and scientific in component matching, the technology is easy to industrially control, forming speed is high, and the manufactured fiberboard is good in waterproof and fireproof performance, uniform in density, free of deformation and suitable for application in the industries of furniture, building materials, packaging, decoration and the like.

Description

technical field [0001] The invention relates to the technical field of deep processing of wood materials, in particular to a straw-added fireproof 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. my ...

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.