最新刊期
      期 0 ， 2020
      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.003
        摘要：In order to make full use of forest resource,7 kinds of local shrubspecies for making hardboards were carried out in production.The resultsshowed that all those shrub species were suitable and certain technologicalparameters had been examined.  
        关键词：Shrub;Hardboard;Technological parameter   
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      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.002
        摘要：Particleboards will have different anti-static properties after spreading different kinds of agents onto particle surfaces. Some fundamentals have been analysed for removing static-charges in this article,The study shows that the volume resistivity of particleboard can be decreased about two orders of magnitude after anti-static agent SN spraying with graphite or gly-cerin,Tbus it can be concluded that the anti-static property will be improved obviously,In addition,to some extent,this property will also be affected by the moisture content and the density of particleboard.  
        关键词：Static-charge;Anti-static agent;Volume resistivity;Particle-board   
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      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.009
        摘要：木材的漂白李坚，刘一星，方桂珍（东北林业大学哈尔滨１５００４０）新采伐的木材色质清晰，经过运输、贮存和加工处理等过程，常使木材发生污染变色。其主要原因有：①由于接触酸、碱、金属离子和空气；②变色菌、酵素等微生物的作用，③光、热的作用与水分的移动，④木...  
          
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      • Wang Jinlin
        Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.001
        摘要：Studies of the effect of veneer thickness, glue spread and woodextractives on bonding strength of plywood made from three kinds of pinespecies with with UF, MUF adhesives were conducted. The effect of assemblingpine and Shorea negrosensis veneers and adding a special additive on theimprovement of bonding strength were also tested.The results indicated thatthe bonding strength of plywood from veneers of 1.5 and 2.0mm in thicknesscould meet or exceed the requirement of JAS for plywood for general useexcept that the plywood made of Laopine sapwood veneer with MUF adhesive. The bonding strength of plywood was decreased with the increase of veneerthickness.While increasing the glue spread within a certain range couldimprove the bonding strength.The bonding strength of pine plywood could beimproved by assembling mixed wood species veneer and adding special additive.  
          
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      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.012
        摘要：温度对杨木阻燃材木材强度的影响李大纲，徐永吉，王卫东（南京林业大学南京２１００３７）随着建筑业的发展和对建筑质量要求的提高，木材及木质材料的阻燃性能日益受到重视。开发并研制新型阻燃剂，研究经阻燃处理后木材强度的变化规律是当前急待进行的基础工作。一些研...  
          
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      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.010
        摘要：水性高分子─—异氰酸酯系胶粘剂的最新发展吴丹平译七十年代初，日本开始对从餐柜中散发出的甲醛气味加以重视，从此，进行了低甲醛或者非甲醛系胶粘剂的开发，其中包括水性高分子异氰酸酯系胶粘剂的开发。当时称为水性乙烯基聚氨酯，在１９８５年日本ＪＩＳ标准制定时被...  
          
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      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.006
        摘要：This paper describes a specific approach to detcting the tensioningdegree of circular saws besed on the study of the choice on those major indexesfor describing the tensioning state of circular saws, with 8031 single-chipcomputer as leading parts and the calculation method of base 2 and complexsequence of FFT Algorithm as its core. The experiments in the detection of dozens of circular saws of different kinds and sizes demonstrate that the quantitative analytic approach posed and detecting methods developed in this paper are feasible in worksites.  
          
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      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.011
        摘要：速生材结构刨花板用胶粘剂的研究刘启明，吴羽飞，汪孙国（南京林业大学南京２１００３７）１前言目前国内刨花板用胶粘剂，绝大部分是ＵＦ树脂胶，多数供室内使用，用于制作家具及办公用具。采用ＰＦ树脂胶生产结构型刨花板的生产线数量极少，即使有也时断时续。其原因是...  
          
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      • Liu Yuan
        Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.007
        摘要：In this paper,three species of Eucalyptus wood were subjected toheat treatment by means of softening with hight temperature and lowering pre-sure instantaneously,The result showed that,except longbeak Eucalyptus,after heat treatment pit membrances on the vessel walls of Eucalyptus woodgot broken to some extent,or even holes appeared as the membrances broppedout.Thus,permeability of the treated、 wood got improved noticeably.Of thetested conditions,140℃ and 5 hours treatment Produced the best result.  
        关键词：Eucalyptas wood;heat treatment;permeability   
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      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.013
        摘要：ＵＰＦ－２树脂的研制和应用郑传东，周珉，包建忠（山东木材厂济南２５００３１）近年来，生产装饰板的各种化工原料涨价，使产品成本剧增，经济效益明显下降。针对于此，我厂研制了ＵＰＦ－１２树脂（简称１２树脂，用来浸渍底层纸和纤维板（生产装饰纤维板之基材）。该...  
          
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      • Tian Huiru
        Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.004
        摘要：The main reason of the deformation of particleboards in differentmoisture conditions is uneven distribution of moisture content in the particle-board,It is necessary to study the processes of moisture transfer for control-ling the deformation of particleboard. First,the moisture unsteady-state diffusion coefficients and surface emissioncoefficients of particleboards were determined experimentally in this study. Then the processes of moisture transfer in particleboards were analyzed andthe moisture distributions of particleboards which were stored under differ ent moisture conditions were predicted by using the numerical method thecombination of finite element method(LEM)and finite difference method(FDM)Finally,the results of computation were proved by experiments。  
        关键词：particleboard;Moisture transfer;Fimte element method;Finite difference method   
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      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.008
        摘要：In themes of environmental pollution and toxicity,chlorinated phe-nols used in wood industry will not be allowed to use in the near future,although their efficiency in controlling sapstain, mould and decay fungi issuperior to others.It is great important to search new chemicals which are ofPotential to prevent from attacking of fungi on rubber wood and bamboo.Ei-ght chemicals,evaluated for controlling this fungi in the laboratory.In con-trolling sapstain fungi(Botryodiplodia theobromae Pat.)of rubber wood spec-imens,the inhibition concentration TMO is 0.2%,NaPCP 0.5%, MECT over1%,whereas0.4%of Cu-8 and 0.1% of TBZ are ineffective. In controllingmould fungi of rubber wood and bamboo specimens, effectiveness of TMO isas good as MECT, better than TBZ, NaPCP. Due to high efficiency, low con-centration, low cost and no pollution,TMO is expected to replace chlorinatedphenols such NaPCP.  
          
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      • Issue 3, (1994) DOI: 10.19455/j.mcgy.1994.03.005
        摘要：This article discribed the structure, characteristics and design me-thod of the sawdust collecting apparatus with air quantity auto-controllingsystem. Analysis results showed that the application of the sawdust collectingapparatus was multiple, flexible and economical.  
        关键词：Air quantity auto-controlling system;Sawdust collecting appara-tus;Microcomputer control   
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