最新刊期
      期 0 ， 2020

        Review

      • ZHANG Jiu-rong
        Issue 2, Pages: 1-4(2008) DOI: 10.19455/j.mcgy.2008.02.001
        摘要：Climate change near the Earth’s surface due to significant green-gas emission and deforestation affects people,plants,and animals.This paper reviewed the latest literature about climate change and explained its causes and its effect on the social life of human beings,our ecosystem,and our economy.It is known that forestation and wood utilization are considered an effective tool to mitigate climate change.Suggestions were made to increase wood utilization for combating climate change.  
        关键词：wood utilization;climate change;forestation;carbon store;CO2 emission   
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      • ZHANG Bi-guang1,XIE Yong-qun2
        Issue 2, Pages: 5-7(2008) DOI: 10.19455/j.mcgy.2008.02.002
        摘要：Progress of current research and development of wood drying technology was summarized and presented in this paper based on the literature from the latest drying symposiums.The authors identified some fundamental research areas of drying theory and technology and evaluated some of the latest drying techniques,such as overheated steam drying,combination drying,and supercritical drying.Energy efficiency,emissions reduction,development of control system,and successful process simulation were considered as the long-term research goals in the future.  
        关键词：wood drying;drying model;supercritical;steam;solar heart   
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        Research & Development

      • ZHANG Yu-ping,FU Feng
        Issue 2, Pages: 8-10(2008) DOI: 10.19455/j.mcgy.2008.02.003
        摘要：Bonding performances of glued-lumber specimens made from two different species were evaluated in this study.A total of six plantation grown wood species,including Chinese fir（Cunninghamia lanceolata）,Poplar（Populus×canadensis cv.’I-214’）,Eucalyptus grandis,E.grandis×E.urophylla,E.citriodor,and E.exserta were selected.The shear strength,percentage of wood failure,and shear-strength efficiency（defined as ratio of shear strength to density） were used to evaluate the bonding performance.The result showed that density was the dominate factor that determined the bonding strength.It was found that specimens made from two species with similar density had a high average bonding strength,while the specimens made from two species with a significant difference in their densities resulted in poor bonding performance.  
        关键词：species;mixed species;glued lumber;shear strength;wood failure   
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      • GAO Li,WANG Zheng,CHANG Liang
        Issue 2, Pages: 11-13(2008) DOI: 10.19455/j.mcgy.2008.02.004
        摘要：A kind of recycled polypropylene was selected as a raw material to make composite with wood fibers.This study evaluated the effect of polypropylene content,additives,density,and fiber size on the performance of the wood-plastic composite.The result showed that increasing polypropylene content improved the overall board performance.Adding additional binders to the wood-plastic composite manufacturing process reinforced the fiber-bonding which could in turn enhance the board properties.Increasing the product’s density was the most effective way to improve bending properties.Fiber geometry was also found to affect board bending properties.It was recommended the following process parameters: 40% recycled polypropylene,2% PAPI additive need to be used in making the wood-plastic composite with board density of 1.05 g/cm3.  
        关键词：recycled polypropylene;wood fiber;composites;process;properties   
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        发布时间：2021-02-08
      • WANG Ya-mei1,LIU Jun-liang1,WANG Xi-ming2
        Issue 2, Pages: 14-16(2008) DOI: 10.19455/j.mcgy.2008.02.005
        摘要：Five preservatives,based on different formulas of Ammoniacal copper quaternary（ACQ）,were selected to treat bamboo to evaluate their performance of decay and leaching resistance.The result showed that ACQ-B and ACQ-D were the best for decay resistance while ACQ-C exhibited poor decay resistance,especially at low retention levels.It was observed that adding（NH4）2HPO4 to the typical ACQ preservative increased the toxicity to white rot（Potyporus versicolor Fr.）,but had little influence to brown rot（Poria placenta Fr.）.The five preservatives also demonstrated different performances in keeping the active ingredients in bamboo.ACQ-B and ACQ-B-P showed a higher preservative fixation rate while the others illustrated lower fixation rates.  
        关键词：ACQ;bamboo;decay resistance;leach resistance   
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        发布时间：2021-02-08
      • SHANG Da-jun1,DUAN Xin-fang2,YANG Zhong-ping1,LI Jia-ning1,WANG Ping2
        Issue 2, Pages: 17-19(2008) DOI: 10.19455/j.mcgy.2008.02.006
        摘要：Ultrasonic wave and stress wave methods were used to evaluate the stress wave,or ultrasonic transmission speed（v）,and dynamic modulus of elasticity（MOED） to examine the influence of CCA treatment on wood properties.Forty seabuckthorn rafters,before and after a CCA treatment,were tested.Through an analysis of Paired Student’s t-test,the results showed that CCA treatment had a significant effect on wood density,but had little influence on stress wave or ultrasonic transmission speed and dynamic modulus of elasticity.The data obtained by the two NDT methods indicated a high-level of consistency which provided a certain dependability of the test results.  
          
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        发布时间：2021-02-08

        Research Bulletin

      • SHI Jun-you1,WEN Ming-yu2,TU Huai-gang2
        Issue 2, Pages: 20-22(2008) DOI: 10.19455/j.mcgy.2008.02.007
        摘要：A green adhesive,with high corn-starch content,was developed.The resin system was based on acidification and oxidization of a corn-starch solution and copolymerization with aqueous polymer isocyanate（API）.The adhesive was used to make plywood samples to evaluate the bonding property.An orthogonal design experiment was used to evaluate the effect of the selected processing factors on the resin performance.The results showed that the reacting temperature,time,and concentration of the corn latex were the most influential factors.The performance of plywood panels made from the starch-based resin under the optimized process met the national product standard GB/T 9846-2004 for type II plywood.  
        关键词：corn starch;acid-thinned;oxidation;polyvinyl alcohol;aqueous polymer isocyanate   
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        发布时间：2021-02-08

        Discussion & Suggestion

      • LU Bin,ZHANG Yu-ping,LI Yang
        Issue 2, Pages: 23-25(2008) DOI: 10.19455/j.mcgy.2008.02.008
        摘要：Samples of wood-based panels overlaid with resin-impregnated paper from 60 companies in Guangdong,Jiangsu,Shanghai,Beijing and Sichuan were tested according to the Chinese National Standard GB/T 15102-2006.The results showed that the rate of products meeting or passing the National Standard was 33.3%.Poor compatibility,small scale,lack of test equipment,and poor management were identified as the major factors that caused the situation.  
        关键词：surface-decorated wood-based panels;resin-impregnated;quality;standard   
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        发布时间：2021-02-08
      • ZHU Yu-hong,CHEN Wei-dan,WANG Yan,WANG Xiao-lei
        Issue 2, Pages: 26-28(2008) DOI: 10.19455/j.mcgy.2008.02.009
        摘要：Characteristics and performance of newly-developed wood-plastic flooring products were evaluated in this paper.After comparing with the performance criteria of the National Flooring Product Standard for commonly-used laminated wood flooring,the wood-plastic flooring product exhibited superior water resistant performance.However,the wood-plastic composite needed improvement in its impact and thermal properties.It was suggested that a product specification and standard for the newly-developed wood-plastic flooring should be established in the future.  
        关键词：wood/plastic flooring;laminated floor covering;product standard   
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        发布时间：2021-02-08
      • LU Liu1,WANG Zhi-qiang1,ZHANG Zhi-guang1,LU Xiao-ning1,GUO Hua-ting2,CHEN Wen-lou2
        Issue 2, Pages: 29-32(2008) DOI: 10.19455/j.mcgy.2008.02.010
        摘要：This paper provided a brief overview on the four major plywood manufacturing clusters in China,and analyzed their production sales,processing technologies,company distributions,and economical advantages and disadvantages.It was recommended to establish constructive governmental policy,product standards,and a vigorous manufacturer’s association to assist sustainable development of the plywood industrial clusters.  
        关键词：industrial cluster;plywood;development;current status;suggestion   
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        发布时间：2021-02-08
      • ZHOU Yong-dong,YE Ke-lin
        Issue 2, Pages: 33-36(2008) DOI: 10.19455/j.mcgy.2008.02.011
        摘要：Efficient and economical utilization of the plantation forest is an effective way to improve forest management and promote long-term sustainability.This paper reviewed current development and technology of plantation forest!management and wood product industry in Australia.A creative technique（called radial sawing）,developed in Australia to improve productivity and add value to the plantation forest,was described.The new technique could increase the process efficiency by 25%,decrease residual stresses,and improve product dimensional stability.Successful plantation forest management and efficient sawing-process technology in Australia can be a good reference to the Chinese wood product industry.  
        关键词：plantation;sawing;sawing technology;radial sawing;sustainability   
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        Piactical Techniques

      • ZHOU Wei,LIU Yan-zhen,ZHAO Yu-jing,LEI Ya-fang
        Issue 2, Pages: 37-39(2008) DOI: 10.19455/j.mcgy.2008.02.012
        摘要：The authors used the mixture of diphenylmethane diisocyanate（MDI） and vinyl acetate-ethylene（VAE） adhesive to develop low-density agglomerated cork board to reduce the manufacturing cost.Four factors,the ratio of MDI and VAE,resin content,hot-pressing temperature,and pressing time,were selected to explore their effects on the board properties with this less expensive resin system.The result showed replacing some MDI with VAE didn’t reduce board properties,but it could lower the material cost by using inexpensive VAE.It was found that the optimized parameters to make the cork boards were: ratio of MDI to VAE 0.25,resin content 10%,hot pressing temperature 150 ℃,and pressing time 30 minutes.  
        关键词：cork;agglomerated material;MDI resin;VAE;physical and mechanical properties   
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        发布时间：2021-02-08
      • SUN Bing
        Issue 2, Pages: 40-43(2008) DOI: 10.19455/j.mcgy.2008.02.013
        摘要：The author developed a control system,using CC-Link bus,to improve the sanding quality and efficiency based on the structure and function of a sanding machine.A detailed description of the system structure,communication method,and software development was presented.The successful application of this system in the field indicated that it was user-friendly,efficient,and dependable.  
        关键词：sander;CC-Link bus;control system   
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        发布时间：2021-02-08

        Practical Techniques

      • HAO Bing-ye,CAO Zhou-qing
        Issue 2, Pages: 44-45(2008) DOI: 10.19455/j.mcgy.2008.02.015
        摘要：为提高石蜡防水剂用于纤维板的使用效果,同时降低生产成本,对普通石蜡进行了改性研究。结果表明,用复配优选的工业植物油改性石蜡,可以明显提高防水效果,并代替30%左右的石蜡。  
        关键词：石蜡;改性;纤维板;防水剂   
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