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Preparation and application of high performance corn starch glue in straw decorative panel

Xiong Xian-qing, Bao Yu-liang, Guo Wei-juan, Fang Lu, Wu Zhi-hui

Abstract


To develop a production technique for nonformaldehyde-tolerant straw veneer by using a biomass-based adhesive, this study used corn starch as the main material and combined it with polyvinyl alcohol solution, flour, and polyisocyanate prepolymer to prepare a corn starch adhesive without formaldehyde. The adhesive was applied to the straw board substrate veneer used for decorative board products, and the production process and production properties were evaluated. The results showed that the corn starch adhesive was excellent, and indexes of the product reached the performance requirements of the artificial board in GB/T 14074-2006. The surface bonding strength of the mattress board veneer decorative cover was greater than 0.40 MPa, and the physical and mechanical properties met or exceeded the national standard (GB/T 15104-2006) for a decorative veneer. Formaldehyde emission in the production process was less than 0.05 mg/L. These results have great significance in the improvement of the practicality of biomass-based adhesives in the manufacture of wood-based panels.


 


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