PENGARUH KOMPOSISI PEREKAT TERHADAP EMISI FORMALDEHIDA DAN KETEGUHAN REKAT KAYU LAPIS

Abstract

One of the drawbacks using plywood bonded with urea formaldehvde ( UF) is formaldehyde emission, especially in a room with limited ventilation such as mobile homes. Some countries have imposed restriction on the limit of formaldehyde emission for certain uses. This work deals with the effect of hardener and extender types on formaldehyde emission and on bonding strength of the UF bonded plywood. The effect of hardener mixed with catching agent on formaldehyde emission is positive, i.e. lower the formaldehyde emission at the same time lower the bonding strength. The effect of extender types were not significant. The interaction between hardener types and extender types were highly significant. This effect, however, was not consistent since its effect on the bonding strength was highly significant in one type of hardener only.

Keywords

• glue composition
• formaldehyde
• plywood
• emission and bonding