Pengaruh Sifat Fisik Dan Anatomi Terhadap Sifat Pengeringan Enam Jenis Kayu

Abstract

This study was intended to investigate the effect of physical and anatomical properties on drying properties of six wood species, i.e. tisuk (Hibiscus macrophyllus), gading (Koilodepas sp), mahang (Macaranga hypoleuca), telisai (Planchonia grandis), sibau (Blumeodendron kurzii), and kenari (Santiria laevigata). The physical properties included density and shrinkages, anatomical structure covering ray width. The drying properties included end & surface checks and honeycomb using high temperature drying method ( at 100 o C temperature). The drying properties for each species were based on observed drying defect classes resulted in high temperature drying.Results of experiment revealed that the specific gravity has relationship geometric regression with tangential shrinkage(R 2 = 0,78), and the ray width has relationship linier regression with drying properties (R 2 = 0,60). Tisuk and sibau belongs to easily dried wood due to having low to medium specific gravity, and large vessel diameter.Mahang, gading, and telisai are hardly to be dried, because they have high specific gravity ( gading and telisai) and low specific gravity on mahang, also unsupported by their anatomical structures such as thick fiber cell-wall (gading), small vessel diameter (mahang and gading) and present of tyloses (gading and telisai).

High temperature drying properties and basic drying schedule of 5 lesser-known species from Riau

“…It is observed that all species have different vessel dimension, vessels frequency, vessel types, ray cells length, frequency of ray cells, ray cells types, fiber dimension, fiber orientation and deposition location of crystallite substance (Djarwanto et al, 2016). These differences are potential causes for any differences observed in the tendency and degree of defects developed by each species.Small vessel diameters and thick cell wall could cause the wood difficult to dry without any defect (Basri & Rulliyati, 2008).…”