Abstract
Wheat straw wood-based panels are widely used as environmental protection materials in indoor building decoration. In this paper, the selection of adhesives for wheat straw based panels was studied, the bonding mechanism was analyzed, and built bonding model. The results showed that: (1) adhesive isocyanate has excellent bonding properties to wheat straw surface, but its price is expensive, the wheat straw wood-based panels have no market advantage. (2) separate sizing, i.e. applying isocyanate glue first and then urea-formaldehyde resin glue, can effectively ensure the bonding strength, reduce production costs, can produce wheat straw wood-based panels that meet international standards and have market competitiveness. (3) In the process of adhesive bonding, the main function of isocyanate adhesive is to contact the hydroxyl group on the surface of straw through its high activity isocyanate group, and produce chemical effect, and then form a high efficient combination; the effect of urea-formaldehyde resin adhesive is to react with isocyanate group and promote the formation of adhesive layer.
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