Cross-linked soy-based wood adhesives for plywood

Published Date
April 2014, Vol.50:199–203, doi:10.1016/j.ijadhadh.2014.01.026

Author 

H. Lei ^,

G. Du

Z. Wu

X. Xi

Z. Dong

Materials and Engineering College, Southwest Forestry University, Kunming 650224, Yunnan, PR China

Accepted 22 January 2014. Available online 6 February 2014. 

Abstract

To improve the water resistance of soy-based adhesive for wood panels, three kinds of cross-linkers, namely, epoxy resin (EPR), melamine–formaldehyde (MF) and their mixture EPR+MF were used in this paper. The results indicated that all the three cross-linkers improved the water resistance of soy-based adhesive and the hybrid cross-linker EPR+MF, was the best. With press temperature 160 °C and press time 8 min, type II and even type I plywood could be prepared when 6.4%EPR+6.4%MF is used as cross-linker of soy-based adhesive. FT-IR indicated that the great improvement of water resistance of soy-based adhesive modified with EPR and MF might be caused by the reaction between epoxy and –OH, and that between MF and –NH.

Keywords

Soy adhesive

Cross-linker

Water resistance

Plywood

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