用热压干燥法干燥的速生柳杉材的抗弯强度研究

BENDING STRENGTH OF PRESS-DRIED PLANTATION CRYPTOMERIA FORTUNEI

本文叙述了用我们研制的木材电热热压干燥装置干燥柳杉（Ｃｒｙｐｔｏｍｅｒｉａｆｏｒｔ－ｕｎｅｉ）小径材板材，当板厚为２５ｍｍ，最高温度为１７０℃，压力０．２ＭＰａ，时间７０分钟，终含水率１０％的试材同温度为６０℃，时间为１２０小时干燥的窑干材相比，抗弯强度与弹性模量分别减少了５．４％和６．５％，而厚度干缩率和密度分别增加了１．３％和１．８％，但统计上均无显著差异。宽度干缩率减小６７．９％。

mm-thick platation Cryptomeria fortunei press-dried at 170℃, 0.2 MPa for 70 minvtes were Compared to those of kilndried at 60℃ for 120 hours, and modulus of rupture and modulus of elasticity decreased 5.4 and 6.5 percent, repectively,thickness shrinkage and specific gravity increased 1.3 and 1.8 percent respectively;however the difference was not statistically significant, and width shrinkage decreased 67.9 percent, the difference was statistically significant.