龙竹竹材热压干燥工艺

Hot pressing technology for Dendrocalamus giganteus bamboo wood

对云南省资源丰富的材用丛生竹种龙竹Dendrocalamus giganteus竹材进行热压干燥特性和热压干燥工艺试验。结果表明:热压温度和水煮温度对竹材热压干燥速度和干燥后竹材强度有显著影响,热压压缩率对竹材强度影响较大,在保证干燥速度和干燥质量的前提下,应尽可能降低竹材压缩率,以减少竹材材积损失。竹材较佳的热压干燥工艺条件是:60℃水煮1 h,热压温度150℃,热压压力0.2 MPa,呼吸间隔5 min,压缩率10%。

The drying properties of Dendrocalamus giganteus, a typical sympodial bamboo in Yunnan Province, were studied with hot pressing technology. The results showed that the hot pressing temperature and the steaming temperature had comparatively significant effects on the drying rate and the quality of bamboo timber; the hot compression rate had vital effects on strength properties of bamboo wood. With the guaranteed drying rate and drying quality, it was suggested that the compression rate of bamboo timber should be lowered to reduce the volume loss of bamboo wood. The optimum hot pressing conditions for the bamboo＇ wood were as follows ： steaming the timber with 60 ℃ water for 1 hour, 150 ℃hot pressing temperature, 0.2 MPa hot pressing pressure, 5 minutes breath interval and 10% compression rate. [Ch, 3 tab. 11 ref.]