SIFAT PELENGKUNGAN LIMA JENIS KAYU DENGAN DUA MACAM PERLAKUAN AWAL

Abstract

Secondary wood industry, i.e. furniture, appliance of sport and boat commonly used wood component in curved forms. Such square components were mostly worked out by sawing boards with a racksaw. This traditional method resulted in low recovery of bending works. In many cases, the curved components could be prepared by bending pieces of pre-treated boards using certain jigs as required in the final work. This study examined bending characteristics of 5 wood species, i.e. asam jawa (Tamarindus indica L.), kendal (Eretia acuminata R.Br.), balobo (Diplodiscus sp.), marasi (Hymenaea sp.) and rasamala (Altingia excelsa N.). Samples were priorly treated with 2 kinds of pretreatment, i.e. (1) steaming and (2) immersing in 3% NaOH solution followed by steaming. Results showed that samples with steaming treatment could be bent at radius of 51 cm, while the second treatment could be bent up to radius of 26 cm. The effectiveness of pre-treatments were significantly affected by woood species. Asam jawa possessed better bending characteristics than other wood species.