Effects of an Inorganic Compound Added to Amino Resin Binders for Plywood

摘要

Introduction Cheap and colorless amino resin binders are widely used for furniture and for interior wood composites. However, amino resin binder used wooden materials considered as formaldehyde emitting materials due to its fatal weakness against moisture. The formaldehyde emission from the wood based panels for interior applications is considered as a major factor affecting sick house syndrome in newly built houses. Therefore, the issue of formaldehyde emission has one of the most important topics of amino resin binder in last few decades. Most attention has been focused on control the formaldehyde emission from amino resin binders through resin preparation methods. Even though many researchers investigated resin preparation methods to improve formaldehyde emission of amino resins, there is limited approach to use secondary formaldehyde reducing or capturing materials. Therefore, this study was conducted to investigate proper formaldehyde reducing material for amino resin binders. A silicon-rich inorganic compound was chosen as possible formaldehyde reducer and its performance as an additive to amino resin binder was examined. Tensile strength and formaldehyde emission of plywood as a function of an inorganic additive to urea-formaldehyde resin and urea-melamine-formaldehyde resin were studied.