The preparation and application of a new formaldehyde-free adhesive for plywood
- Resource Type
- Article
- Authors
- Tang, Liang; Zhang, Zhao-gang; Qi, Jiao; Zhao, Ji-ruo; Feng, Ying
- Source
- International Journal of Adhesion & Adhesives. Sep2011, Vol. 31 Issue 6, p507-512. 6p.
- Subject
- *ADHESIVES
*PLYWOOD
*SURFACE preparation
*GRAFT copolymers
*POLYOLEFINS
*WATERPROOFING
*FORMALDEHYDE
- Language
- ISSN
- 0143-7496
Abstract: In this study, we developed a new formaldehyde-free adhesive prepared by in-situ chlorinating graft copolymerization for plywood. The main ingredients of this adhesive include maleic anhydride (MAH) and high density polyethylene (HDPE) that is MAH grafted onto HDPE (PE-cg-MAH). The reaction between this adhesive and veneer, the optimum formulation to bond veneer and the optimum hot-press conditions to prepare the plywood were investigated. A boiling water test was employed to evaluate the strength and water resistance of plywood bonded with this adhesive. The results showed that the properties of the resulting plywood using PE-cg-MAH as an adhesive can meet the standard of Type I plywood and the optimum hot-press conditions were 160–165°C and 5min. When the chlorine contents of PE-cg-MAH was about 3% (wt%), the plywood panels had a higher shear strength after boiling water test above the hot-press conditions. [Copyright &y& Elsevier]