Gökay NEMLİ, Turgay AKBULUT

Influence of melamine formaldehyde addition into urea formaldehyde adhesive onsome properties of particleboard

Bu çalışmada üre formaldehit tutkalına melamin formaldehit ilavesinin yonga levhanın fiziksel (kalınlığına şişme oranı) ve mekanik (eğilme direnci, elastikiyet modülü ve yüzeye dik çekme direnci) özellikleri üzerine etkisi incelenmiştir. Melamin formaldehit ilavesi mekanik özellikleri istatistik! anlamda etkilememiştir. Bununla birlikte, bu uygulama yonga levhanın kalınlığına şişme oranını azaltmıştır. %30 melamin formaldehit ve %70 üre formaldehit kullanılarak üretilen yonga levhalar standartlarda öngörülen fiziksel ve mekanik özellik değerlerini karşılamışlardır. Bu çalışma; üre formaldehit tutkalına melamin formaldehit ilavesinin % 30'u aşmaması gerektiğini göstermiştir.

Üre formaldehit tutkalina melamin formaldehit ilavesinin yonga levhanın bazı özellikleri üzerine etkileri

In this study, influence of melamine formaldehyde addition into the urea formaldehyde adhesive on some physical (thickness swelling) and mechanical (static bending, modulus of elasticity and internal bond) properties of particleboard was investigated. Melamine formaldehyde addition did not affect the mechanical properties, statistically. However, this application improved the thickness swelling of particleboard. The particleboards produced with 30% melamine formaldehyde and 70% urea formaldehyde usage had the required levels of physical and mechanical properties by the standards. This study showed that melamine formaldehyde addition into the urea formaldehyde should not exceed 30%.

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