最新刊期
      期 0 ， 2020
      • Wang Fenghu
        Issue 4, Pages: 3-7(1993) DOI: 10.19455/j.mcgy.1993.04.001
        摘要：A double pressing method was designed to produce 8 types of board, a total number of 24 post heat treated PF bonded particleboards. After hot pressing, the board was treated in second press with 170℃ for 10 or 20 minutes to allow sufficient heat transfer. The measurement of physical properties of boards were carried out. The results suggest that thickness swell and irrecoverable swell of the boards can be significantly reduced to very low levels, with a 10 minutes treatment. The superior board properties are possibly due to futher stress relaxation through mechano-sorptive creep and the alkali and thermal plasticisation in the wood glue lines.  
        关键词：PF particleboard;Double pressing;Stress relaxation;Physical properties of boards.   
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        发布时间：2021-03-12
      • Zhu Huanming
        Issue 4, Pages: 8-14(1993) DOI: 10.19455/j.mcgy.1993.04.002
        摘要：After 10, 15, 30, and 50 circle of accelerated ageing with boilingdrying treatment comparision of block shear strength among bonded with RPF, PF resin and solid wood were conducted. The result indicated that the weatherability of RPF resin was quite better-thanof PF resin, and the developed RPF resin was a structural glue with excellent weatherability.  
        关键词：RPF resin;PF resin;Block shear strength;Accelerated ageing;Bonded strength   
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        发布时间：2021-03-12
      • Shang Deku Wang Maodi Cai Liping
        Issue 4, Pages: 15-17(1993) DOI: 10.19455/j.mcgy.1993.04.003
        摘要：Air permeabilities of four kinds of wood chip aggregates of different species such as poplar, birch, basswood and elm were experimentally studied. The results showed that when dry density of chip bed maintained as constant, air permeabilities of the materials decreased with the increasing of moisture content(MC). When MC was around 30%～80%, the variation of air permeabilities with respect to MC was not as much as that when wood chip was changing from oven dry to about 10% MC. This visualizes that from oven dry upto 10% MC, the influence of MC on air permeabilities of wood chip bed is very significant. When MC maintained as constant, air permeabilities decreased with the increasing of chip bed density.  
        关键词：Wood chip aggregates;Air permeability;moisture content;Chip bed density   
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        发布时间：2021-03-12
      • Liu Xiuying Wang Jianjiun Li Xingfang
        Issue 4, Pages: 18-21(1993) DOI: 10.19455/j.mcgy.1993.04.004
        摘要：Activities of lignin decomposition enzyme of 13 individual wood-rot fungi in 8 species have been studied. The result showed that all of the 13 fungi have capability of lignin decomposition to different extent. White woodrot fungi have higher activities than brown wood-rot fungi. The rate of activity increasing and the period of high activity remaining of white wood-rot fungi are quicker and longer than that of brown wood-rot fungi.  
        关键词：Wood-rot fungi;White wood-rot fungi;Brown wood-rot fungi;Enzyme of lignin decomposition   
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        发布时间：2021-03-12
      • Song Dingqian Lu Xiaoning Zhou Xiaolu
        Issue 4, Pages: 22-25(1993) DOI: 10.19455/j.mcgy.1993.04.005
        摘要：This paper deals grey system (GS) to the management for furniture manufacturing. The grey linear programming (GLP) models are built for expected profit values on tea table manufacturing, instead of linear programming (LP) model, which satisfy dynamic characteristics of furniture manufacturing. Resulted from the solution, GLP is a sort of practicable method on working out the plans for furniture manufacturing.  
        关键词：Grey linear programming;Expected target;Expected profit value;Furniture manufacturing;Tea table   
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        发布时间：2021-03-12
      • Zhang Lifei Luo Xiugin
        Issue 4, Pages: 26-32(1993) DOI: 10.19455/j.mcgy.1993.04.006
        摘要：A study on the wood properties of natural growth poplar (Populus davidiana) from six northern provinces of China has been done. The results of morphology of fibre, proportion of different tissues, physical and mechanical properties, chemical composition have been studied. The stems of six provenience poplar contained much gelatinous fiber, tylesis and pith fleck. The physical and meehanical properties of six provenances changed within different groups. This poplar is a good pulping material.  
        关键词：Populus davidiana;Provenance (Provenience);Wood proper(?)ies;Gelatinous fibre   
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        发布时间：2021-03-12
      • Issue 4, Pages: 33-35(1993) DOI: 10.19455/j.mcgy.1993.04.007
        摘要：<正> 由于森林资源结构的变化,世界各国,特别是林业发达国家对小径材的开发利用非常重视。60年代初,美国、加拿大相继研制出用于小径材加工的主工艺设备,形成了削片—制材的工艺生产线。  
          
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        发布时间：2021-03-12
      • Issue 4, Pages: 36-39(1993) DOI: 10.19455/j.mcgy.1993.04.008
        摘要：<正> 据不完全统计,我国现有刨花板生产企业已超过200家,设计能力达230万m~3,其中引进设备或与国外合作生产设备的能力约占60%。本文试图利用国家人造板质检中心于近几年抽样检查的刨花板测  
          
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        发布时间：2021-03-12
      • Issue 4, Pages: 40-42(1993) DOI: 10.19455/j.mcgy.1993.04.009
        摘要：<正> 1 概述地面装饰为室内装饰的重要部分。因为人与地面接触的时间最长,最贴近,地面材料还要承重、耐磨。对地面装饰材料的要求严于任何其它室内装饰部位材料。这些要求包括:美观、坚硬耐磨、强度、  
          
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        发布时间：2021-03-12
      • Issue 4, Pages: 43-45(1993) DOI: 10.19455/j.mcgy.1993.04.010
        摘要：<正> 在人造板生产设备中,有许多机械的旋转部件中需要进入一定压力的流体。例如,环式拌胶机利用旋转的搅拌粱叶使胶均匀涂布在刨花表面,但在拌胶过程中强烈摩擦产生的热量易使胶液提前固化,故需将搅拌轴及桨叶制成空心并通入冷却水进  
          
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      • Issue 4, Pages: 46-48(1993) DOI: 10.19455/j.mcgy.1993.04.011
        摘要：<正> 降低木质刨花板毒性的基本途径是应用低摩尔比的脲醛树脂。应用于制造木质刨花板的树脂为化工企业生产的КФ—МТ—БП树脂和俄卫生部许可的КФ—МТ—15树脂。但是,后者的数量并不能满足生产需要。因此,刨花板企业已开始用尿素来改性КФ—О树脂和КФ—МТ—БП树脂,使之达到КФ—МТ—15的性状。  
          
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        发布时间：2021-03-12
      • Issue 4, Pages: 49-52(1993)
        摘要：<正> 由中国林科院木材工业研究所研制的“木材性质综合信息数据库”于1993年8月在北京通过鉴定。该数据库收录了木材工业研究所几十年的科研成果,涉及木材标本、木材用途、木材构造与识别、木材物理、力学、化学性质、商用木材的中外译  
          
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        发布时间：2021-03-12
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