Characteristics of high-density fibreboard produced with the use of rice starch as a binder

Abstract

Characteristics of high-density fibreboard produced with the use of rice starch as a binder. The adhesives used as binders in the boards are not biodegradable, and their formaldehyde is toxic. Nowadays it is very important to take care of the environment. There are a lot of biodegradable products that as well as the current board binders can meet good mechanical and physical properties and at the same time not harm the environment. Therefore in this project, the study aimed to investigate the possibility of producing dry-formed fibreboards usingrice starch as a binder. The research involved the production of boards with a mass proportion of rice starch 0%, 10%, 12%, 15%, and 20% (when referred to as totally dry wood fibre mass) and to study of their selected physical and mechanical properties. The results proved that rice starch can be used as a binding agent if we choose the right amount of starch so that it can improve some mechanical and physical properties. Very good properties came out for the determination of modulus of elasticity in bending and of bending strength and for screw withdrawal resistance with a high rice binder content, but on the other hand for internal bonds, the high rice content reduced the properties. For some studies, rice flour improved properties but not enough to comply with standards as was the case with the swelling of the thickness.