Zvolen, Slovakia
Zvolen, Slovakia
The aim of the research was to modify urea-formaldehyde resin (UF) by cellulose sludge and wood bark in order to reduce formaldehyde emission. Wood bark powder was a mixture containing 50 % of beech bark and 50 % of spruce bark. Release of formaldehyde and shear strength of the adhesive joints was tested on five resp. three-layer alder plywood. Formaldehyde emission was determined by 24-hour desiccator method and monitored during seven weeks after gluing. After 7 weeks of the experiment the reference UF adhesive showed formaldehyde emission decreased by 39 %.
formaldehyde emission, hygienic properties, UF adhesive, furniture, plywood
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