行业新闻

全球森林仍在减少;世界中纤板生产情况;欧洲和北美主要国家的刨花板生产能力;英国超过55％的进口木材经过认证;英国最大的回收木材利用厂开工。     

今年京城地区暖冬木材制品市场行情冷热不匀

京城地区木材业界针对木材制品供销热度经常挂在嘴边的“金九银十”的季节已经过去,冬季市场行情冷暧如何？首先,从总的木材市场走势来看,应该说是热中有冷,冷中带热,有冷有热,冷热不匀。     

Dielectric properties of copper-ethanolamine treated Chinese fir (Cunninghamia lanceolata Hook.)

In order to clarify the interaction between copper and wood substances in wood treated with copper containing water-borne wood preservatives, the dielectric constant ε′ and dielectric loss factor ε″ of untreated wood and wood treated with four concentration levels of copper-ethanolamine (Cu-EA) solutions were determined within a temperature range from –100 to 40°C and a frequency range from 100 to 1 MHz. Three dielectric relaxation processes were observed in the ε″ spectrum; among them R-I is based on the reorientation of methylol groups in the amorphous region of wood cell walls and R-II is related to wood extractives. R-III appeared in Cu-EA treated wood, and its magnitude decreases with the concentration of Cu-EA solutions used in this experiment. This relaxation process was considered to be based on the reorientation of copper-ethanolamine-wood complexes in wood cell walls. At low copper retention, the hydrogen in the complex can form hydrogen bonding with adjacent hydroxyl groups, which results in a strong bonding state between copper and wood; at high copper retention, the numerous copper-ethanolamine complexes not only hinder them from forming hydrogen bonding with adjacent wood molecules due to steric hindrance, but also weaken the interaction between wood molecules themselves, which corresponds to reducing ε″ values of both R-I and R-III processes. The results explain the fact of in-creasing copper leaching in wood treated with high concentration copper-based water-borne preservatives.     

楚雄市“绿盾二号行动”战果显著

近年来,楚雄市森林公安机关开展"绿盾二号行动",保持对破坏森林和野生动植物资源违法犯罪活动的高压态势,以"打团伙、挖窝点"为重点,有效地保     

通讯员园地

林业外事工作取得骄人成就我省近十年来由于省林业外事工作较好地宣传了云南,提高了云南独特的林业资源在国内外的知名度,吸引了国际社会较多的关     

水载型木材防腐剂有效成分的加速固着方法

以铬化砷酸铜(CCA)为代表的水载型防腐剂,逐渐被其他主要有效成分为铜的水载型防腐剂取代,这类防腐剂中的.针对水载型防腐剂抗流失性差的缺点,介绍4种用于加速防腐剂中有效成分在木材中固着的方法,分析了这些方法对水载型防腐剂中有效成分的固着效果,并就如何加速ACQ中有效成分的固着研究进行了分析和展望.     

现代课堂教学技能在“木材防腐与改性”课程中的实践

针对“木材防腐与改性”课程特点,把现代课堂教学技能应用到“木材防腐与改性”课程教学实践中。按照导入规律,有针对性地选择导入方式;按照事实性知识和抽象性知识的差异,确定讲解模式;遵循提问的基本程序,选择恰当的提问策略;按照动静结合、多种媒体演示手段综合利用,选择演示技能;按照延伸拓展的程序,灵活选择结束方式。充分利用导入、讲解、提问、演示、结束等一系列基本课堂教学技能,为教学服务。     

马占相思木材和树皮性质研究进展

概述了国内外马占相思木材解剖性质、化学性质、物理性质、力学性质、加工性能、木材耐久性及功能性改良、树皮化学性质等方面的研究成果,展望了马占相思木材科学方面的研究方向,为马占相思木材和树皮性质的进一步研究提供有益参考。     

新年京城木材制品市场有新貌——销得快、行情好

进入2007年以后的这一个月份以来，京城地区的木材市场如同受到年节气氛渲染，也始得比往年格外热闹。其主要特点是，人部分木材及其制品销售速度较怏，除个别木地板产品价格行情与年前相比略显走低之外，大部分木材制品其价格行情都显走强、向好之势。     

一季度京城地区木材市场春暖花开

春分时节,北京地区已然是春暧花开的季节了。如同这个季节的气候一样,整个京城地区,连同京津冀三角经济带,生产和建设活动也逐渐显示出朝气蓬勃的活力。与之紧密相关的木材市场也随之萌动。无论是原木、锯材市场,或是装饰装修木制品市场的销售情况,都开始活跃起来,价格行情也有所升温。