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2023378 
Journal Article 
Evaluation of melamine-modified urea-formaldehyde resin for plywood flooring adhesive application 
Oh, YS; Kim, KHee 
2011 
1 
Scientia Forestalis
ISSN: 1413-9324 
39 
90 
199-203 
English 
WOS:000293816200008 
A melamine-modified urea-formaldehyde (MUF) resin, as a plywood flooring adhesive, was synthesized in the laboratory with a formaldehyde/(urea + melamine) mole ratio of 1.48. The physical characteristics of the MUF resin including nonvolatile solids, specific gravity, pH, free formaldehyde, and viscosity, etc., were determined. The MUF resin was mixed with an extender, pinenut flour and NH4 Cl. The mixture contained approximately 39 percent resin solids, 55.8 percent total solids, and 44.2 percent water. The mixture gel time with the catalyst was 1.9 minutes at 100ºC. Laboratory plywood panels with the MUF resin adhesive mixture were made using Korean wood species. The plywood panels were tested for tension shear strength after 3-hour soak (60ºC water) aging method, modulus of rupture, formaldehyde emission, and surface abrasion according to the procedures of KS F 3101, and KS F 3114. The test results showed that the MUF resin can be used for Ondol plywood flooring production 
adhesive mix; plywood flooring; physical and mechanical properties