Preparation method of plant straw plate

Abstract

The invention provides a preparation method of a plant straw plate. The preparation method takes full components of dried corn straws, rice straws, wheat straws, sunflower straws, rapeseed straws and cotton straws as raw materials and utilizes a special adhesive of polyether polyol and a prepolymer of isocyanate, so that the water-resisting capability is strong, and the inner bonding intensity of a product is improved; the related indexes of the produced plant straw plate are equal to or better than quality standards of national standards (GB / T4897-92) of a wood artificial plate. The indexes including the inner bonding intensity, the static bending strength, the formaldehyde releasing amount, the water absorption thickness expansion rate and the like. The production process is simplified and the production cost is reduced.

Description

technical field

[0001] The invention relates to a method for preparing straw boards by utilizing crop straws. It belongs to the field of new building materials and biomass comprehensive utilization. Background technique

[0002] Straw-based panels have already been produced, such as corn straw panels, straw panels, and wheat straw panels. Chinese patent (CN87103594) relates to the production technology and process of corn stalk board, which is characterized in that corn stalks are crushed and air-selected, and the materials with a fiber length of less than 25mm are selected to be dried and sent to the glue mixer to be bonded with urea-formaldehyde resin. Mixture mixing, paving pre-pressing, hot pressing molding. The internal bonding strength of the board prepared by this method is not enough, and the quality of the board is poor.

[0003] In order to improve the quality of straw slabs, cornstalk husks are used both internationally and domestically to produce homogeneous s...