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.