Artificial board made of crop straw and method for manufacturing artificial board made of crop straw

Abstract

The invention discloses a method for manufacturing an artificial board made of crop straw. The method for manufacturing the artificial board made of crop straw comprises the steps that (1) the straw is cut into straw sections with the lengths ranging from 20 mm to 40 mm, wherein the water content of the straw sections ranges from 12% to 20%; (2) the straw sections are pulverized by means of a pulverizer, wherein the mesh size of the pulverizer ranges from 5 mm to 10 mm, the sizes of fiber particles obtained after pulverization are in normal distribution, the value of mu ranges from 0.2 mm to 1.0 mm, and the value of sigma ranges from 0.2 mm to 0.6 mm; (3) coarse materials and fine materials are obtained by screening the fibers obtained after pulverization through a screening device, wherein the ratio of mass of the coarse materials to the mass of the fine materials is 1-2:1-2; (4) the coarse materials and the fine materials are dried respectively, the water content of the coarse materials is controlled between 8% and 14%, and the water content of the fine materials is controlled between 10% and 14%. According to the method for manufacturing the artificial board made of crop straw, materials, obtained after screening, of a surface core layer of the artificial board made of crop straw can meet different form distribution requirements, namely, thick wood shavings do not exist in the surface layer, and superfine fibers do not exist in the core layer.

Description

technical field [0001] The invention relates to the field of artificial board manufacturing, in particular to a crop straw artificial board and a production method thereof. Background technique [0002] Crop straw is a valuable renewable resource, and the annual output of crop straw in my country is about 700 million tons. However, due to the influence of consumption concepts and lifestyles for a long time, my country's rural straw resources are completely in a state of high consumption, high pollution, and low output. A considerable part of crop straws are discarded or burned, and have not been rationally developed and utilized. Making full use of straw, a renewable resource, is undoubtedly one of the effective ways to solve the shortage of resources. The use of crop straws to make wood-based panels is one of the projects that is indeed feasible and has already been industrialized. [0003] However, the status quo of the straw-based panel industry is not optimistic. The bo...

AI Technical Summary

Problems solved by technology

However, the particle size distribution of the hammer crushed by the hammer crusher is relatively wide, and it does not meet the different requirements of the surface core layer on the fiber fineness.

Even if the surface and core layers are divided and crushed separately, such as the surface layer, there will still be some coarse materials appearing on the surface of the board, which will affect the decorative application of the board

At the same time, there is almost no fine material in the core layer, and the specific surface of the fine material is large, which will consume a lot of adhesive

Moreover, the fine screen increases the difficulty of crushing, especially when the moisture content of the straw cannot be guaranteed, resulting in low output and frequent equipment failures, which seriously restricts the production capacity of the crop straw wood-based panel production line

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