Ecological sound-absorbing, sound-insulating and high-density fiberboard and preparation method thereof

Abstract

The invention discloses an ecological sound-absorbing, sound-insulating and high-density fiberboard. The ecological sound-absorbing, sound-insulating and high-density fiberboard is characterized by being prepared from, by weight, 42-45 parts of crop straw, a proper amount of sodium hydroxide with the concentration of 2%, 2-2.5 parts of silane coupling agents kh450, 66-70 parts of ethyl alcohol with the concentration of 95%, 30-32 parts of wood scraps, 7-8 parts of waterborne polyurethane adhesives, 1.5-2 parts of emulsified paraffin, a proper amount of water, 4-6 parts of zeolite molecular sieves, 2.5-3.5 parts of graphene, 5-7 parts of houttuynia cordata, 3-4 parts of complete flax plants and 1-2 parts of epoxidized soybean oil. The surfaces of the crop straw, wood scraps and other components used are properly processed on the basis of a traditional process, and a large number of forest resources can be saved. Meanwhile, the treating agents comprise the zeolite molecular sieves and the like and are matched with natural plant fibers to generate multi-pore components, so that the sound absorbing and insulation effects are enhanced. The product strength is high, quality stability is good, and the use range is wide.

Description

technical field [0001] The invention relates to the technical field of deep processing of wood materials, in particular to a sound-absorbing and sound-insulating ecological 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...

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.