Karakteristik Cross Laminated Timber (CLT) Kayu Jabon Dengan Perekat Melamin Formaldehida (MF) Modifikasi Aplikasi Kempa Dingin

Abstract

Cross Laminated Timber (CLT) adalah papan komposit yang terbuat dari kayu berlapis-lapis yang ditumpuk tegak lurus serta ditingkatkan stabilitas dimensinya. Tujuan dari penelitian ini adalah menganalisis sifat fisis dan mekanis CLT dari kayu jabon (Anthocephalus cadamba) dengan perekat MF modifikasi. Modifikasi perekat MF dilakukan untuk penggunaan kempa dingin. Berat labur CLT terdiri atas tiga variasi yaitu 250, 280 dan 300 g/m2. Evaluasi karakteristik perekat MF modifikasi berupa kadar padatan, waktu gelatinasi, viskositas, pH, FTIR dan DMA. Evaluasi karakteristik fisis dan mekanis berupa kerapatan, kadar air, delaminasi, MOE sejajar serat muka dan tegak lurus serat muka (flatwise & edgewise), MOR sejajar serat muka dan tegak lurus serat muka (flatwise & edgewise), tekan sejajar serat, tekan tegak lurus serat dan keteguhan rekat. Berat labur CLT hanya berpengaruh nyata terhadap nilai delaminasi dan keteguhan rekat. CLT dengan berat labur 300 g/m2 memiliki karakteristik sifat fisis mekanis yang paling optimum. Semakin tinggi berat labur perekat, semakin tinggi sifat fisis dan mekanisnya. Kualitas produk kurang baik karena tekanan kempa yang minim pada saat pengempaan CLT.

Cross Laminated Timber (CLT) is a composite board made of multilayered timber that is stacked perpendicularly and its dimensional stability is enhanced. The objective of this research was to analyze the physical and mechanical properties of CLT from jabon wood (Anthocephalus cadamba) with modified MF adhesive. Modified MF adhesive was carried out for cold pressing applications. The glue spreads of CLT consist of three variations, namely 250, 280, and 300 g/m2. Evaluation of the characteristics of modified MF adhesive in the form of solids content, gelation time, viscosity, pH, FTIR, and DMA. Evaluation of the physical and mechanical properties was carried out including density, moisture content, delamination, MOE parallel and perpendicular to the face grain (flatwise & edgewise), MOR parallel and perpendicular to the face grain (flatwise & edgewise), compression parallel to the grain, compression perpendicular to the grain, and bonding strength. The glue spreads of CLT only significantly affected the value of delamination and bonding strength. CLT with a glue spread of 300 g/m2 has the most optimum mechanical and physical properties. The higher the glue spread, the higher the physical and mechanical properties. The poor product quality because of minimal compression pressure during CLT compression.