New technology for preparing high-performance waterproof fiberboard with semipermeable membrane technology enhancing enzymolysis degree

Abstract

The invention relates to a technology. According to the technology, multiple biological enzyme programs are used for processing crop waste straw, a semipermeable membrane technology is used for solving the problem that hydrolysates inhibit the enzymolysis degree, and a high-performance waterproof fiberboard is produced. The technology is characterized in that the crop waste straw is loosened through a loosening machine, the laccase and hemicellulase programs are added for hydrolysis, the hydrolysis process is conducted in a system with a semipermeable membrane capable of filtering out medium and small size molecules, after hydrolysis is completely conducted, processed straw fibers and the medium and small size molecules filtered out by the semipermeable membrane are mixed again, moisture is evaporated, drying is conducted until the water content reaches 1-5 percent, about 3 percent of rosin powder is added to be evenly stirred and put into a die to be laid and packaged, and the rosin powder is pressed under the designated temperature, pressure intensity and time. Raw materials are sufficient, the price is low, materials are cheap, a chemical adhesive waterproof agent does not need to be added on the manufactured fiberboard, cost of the board is reduced, the manufacturing technology is environmentally friendly and free of pollution, and the obtained fiberboard is good in mechanical property, good in waterproof performance, high in finished product qualification rate and not prone to deformation.

Description

technical field [0001] The invention relates to a new process for preparing a high-performance waterproof fiberboard by using agricultural crop waste straw as a base material, processing through various biological enzyme programs, adopting a semi-permeable membrane technology to improve the degree of enzymolysis and adding rosin. It belongs to the field of man-made fiber boards. Background technique [0002] With the development of the national economy, the demand for wood and wood products has increased significantly. Traditional wood-based panels (particleboard, plywood, fiberboard, etc.) are all made of wood. The reduction in wood supply has made wood-based panel factories face the pressure of lack of raw materials. In order to alleviate the contradiction between the supply and demand of timber in our country, in addition to vigorously building plantations and efficiently utilizing existing forest resources, it is necessary to make full use of agricultural processing res...

AI Technical Summary

Problems solved by technology

[0004] At present, there are reports of using crop wastes to prepare fiberboards, such as CN 102463617 A, which uses plant straw as raw material, adds glue and paraffin emulsion as waterproofing agent, and prepares straw fiberboards. The properties meet the national standard; CN 1070863A uses moso bamboo as raw material, adds urea-formaldehyde resin and phenolic resin as adhesive, and paraffin as waterproof agent to prepare medium density fiberboard; CN 1559769A uses bamboo grass fiber and wood fiber as raw material, mixed with resin glue Preparation of fiberboard; CN 1899783A uses crop straw as raw material, applies water-based polymer-isocyanate adhesive, modified starch adhesive, etc. to prepare straw particleboard, CN101934548 A uses bamboo, wood scraps, crop straw, etc. Blasting treatment, applying phenolic resin adhesives to prepare wood-based panels, these inventions have made great breakthroughs in cost compared with traditional man-made fiberboards, but they all need to add additional chemical adhesives and waterproofing agents, resulting in the production process is not environmentally friendly