木材表面あらさの官能評価と物理的評価の関係

Abstract

官能的に評価された木材の表面粗さが, 客観的に測定できる木材の材質特性値とどのように関連しているかを, 主成分分析法を用いて解析した。その結果官能的な木材の粗さは触針法で測定されるHmaxによって大部分が説明でき, 針葉樹材では年輪に基づく凹凸の深さとピッチが, 広葉樹材では道管縦断面に基づく凹凸の深さとともに材の比重が宮能的な粗さに影響することが明らかになった。

Sensory roughness of wood surface for 82 wood specimens, 18 softwood and 64 hardwood, was measured and analyzed in relation to the anatomical and physical characteristics of the specimen by the use of principal component analysis. Although the sensory roughness is highly correlated with the maximum depth determined from the surface profile Hmax, the relationship between both the characteristics for softwood was found to be different from that for hardwood. The sensory roughness for softwood is mainly due to the depth and pitch of the wave on the surface arising by annual rings, but that for hardwood depends upon the depth of recess produced by large vessels. The specific gravity also affects the sensory roughness for hardwood.