Method for preparing maize straw board

Abstract

The invention discloses a method for preparing a maize straw board, which comprises the steps of dehydrating maize straws, cutting off the maize straws, compressing the maize straws into an isopycnic straw board-preparation raw material, drying the raw material, sieving the raw material into a coarse material and a fine material, spraying an adhesive, and performing hot press molding, wherein the weight percentage of the straws and the adhesive is 85-90: 10-15. The adhesive for preparing the board consists of 75 to 90 percent of urea-formaldehyde resin, 5 to 8 percent of ammonia water, 0.5 to 1 percent of polyvinyl alcohol, 6 to 12 percent of melamine, and 0.5 to 1 percent of ammonium chloride (weight proportion). The method is characterized by utilizing all components (peels, pulp and leaves) of the maize straws, adopting special equipment to directly compress the cut straws into the board-preparation raw material with the equidensity of between 0.8 and 1.0g / cm3, ensuring the same density of the raw material in sizing and pressing links of the board, improving the internal bonding strength of products, and also improving the utilization rate of the raw material and simplifying production technology so as to reduce production cost at the same time. The maize straw board has the advantages of adequate raw materials, low cost, high board quality, good biological degradability, and no pollution to the environment.

Description

Technical field [0001] The invention relates to a preparation method for preparing a corn stalk board by using crop stalks. Background technique [0002] Straw wood-based panels have already been launched, such as straw panels, wheat straw panels, etc., and corn stalk panels have also been launched. Chinese Patent, Patent No.: 87103594, Announcement No.: CN87103594, a method for manufacturing boards from corn stalks. The present invention relates to the production technology and process of corn stalk boards. It is characterized by crushing and winnowing corn stalks and selecting fiber length The materials within 25mm are dried, sent to the glue mixing machine to mix with the binder, pavement pre-compression, and then into the hot press to form. In this invention, the corn stalks are directly bonded and hot-pressed after being crushed. Because the corn stalks are composed of bark, flesh and leaves, the density of cellulose, hemicellulose and lignin contained in it is different. ...

AI Technical Summary

Problems solved by technology

[0004] Combining the current corn straw board production technology introduced in the international and domestic markets, the use of corn straw raw materials has the disadvantages of high cost, complicated production process, and low raw material utilization rate, which makes it difficult to form industrialized and large-scale production of corn straw board. chemical production