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Studies on Adhesion of Fancy Veneer and Formaldehyde Emission of Wood-Based Floorings by Mole Ratios of Urea and Melamine  

Kang, Eun-Chang (Korea Forest Research Institute)
Park, Jong-Young (Korea Forest Research Institute)
Park, Heon (Department of Forest Sciences, Konkuk University)
Publication Information
Journal of the Korean Wood Science and Technology / v.30, no.2, 2002 , pp. 165-171 More about this Journal
Abstract
This study was to investigate the adhesion properties of fancy veneer and base panels and formaldehyde emission of wood-based floorings bonded with urea-melamine formaldehyde adhesives. We focused on stoichiometric mole ratio of reactive functional groups. The urea-melamine formaldehyde adhesives were made at twelve different formaldehyde/urea-melamine mole ratios. The interlaminated shear strength and formaldehyde emission of wood-based floorings bonded with selected adhesive among these adhesives were examined. The results showed that the bonding properties were high and the formaldehyde emission was low as the adhesive consisted of stoichiometric mole ratio of formaldehyde/urea-melamine. Interlaminated shear strengths of HDF(High Density Fiberboard) flooring were over 14 kgf/cm2 at all mole ratios. At the mole ratio of 1.0, HDF flooring showed low value of formaldehyde emission of 953 mg/L. Interlaminated shear strengths of Plywood flooring were high, 14.02 kgf/cm2 at mole ratio of 1.4. At the mole ratio of 1.0, Plywood flooring showed low value of formaldehyde emission of 0.26 mg/L.
Keywords
urea; melamine; mole ratio; stoichiometry; bonding properties; formaldehyde emission;
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