最新刊期
      期 0 ， 2020
      • WANG Zhao-hui,REN Hai-qing,LUO Xiu-qin,ZHOU Hai-bin
        Vol. 23, Issue 3, Pages: 1-4(2009) DOI: 10.19455/j.mcgy.2009.03.001
        摘要：In this research,the vibration method was used to evaluate the mechanical properties of dahurian larch（Larix gmelini）,a major softwood species that grows in the Northeastern China.The results showed a good relationship between bending strength and modulus of elasticity（MOE）.The good correlation of dynamic（from the vibration test） and static MOE indicated that vibration could be used as an effective mechanical stress grading tool for larch lumber.Lumber was sorted into four grades: M22,M26,M30,and M35 using mechanical stress grading.The grades were equivalent to the European machine grade of C22,C26,C30,and C35,respectively.It was found that through mechanical grading;the graded lumber had a higher design value than the existing general design value of domestic larch according to GB 50005-2003.  
        关键词：dimension lumber;Dahurian Larch;mechanical stress grading（MSG）   
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        发布时间：2021-02-08
      • LI Hui-ming1,CHEN Ren-wang1,YAN Ting1,CHENG Kang-hua2
        Vol. 23, Issue 3, Pages: 46-48(2009) DOI: 10.19455/j.mcgy.2009.03.015
        摘要：To better understand the mechanism of the heat-treatment,the authors evaluated the change in major chemical composition,decay resistance,and mold inhibition of selected dimensional lumber treated at 180 ℃and 230 ℃.The results showed that when the temperature of treatment increased,the moisture content,holocellulose,and hemicellulose contents of the treated lumber decreased.The cellulose and acid-insoluble lignin contents of the treated lumber,however,increased.The heat-treated lumber also improved their decay resistant performance and their mold inhibition remained the same as the control lumber.  
        关键词：heat-treated;chemical composition;decay resistance;mold inhibition   
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        Research & Development

      • JIN Ju-wan1,CHEN De-zhong2,XU Yong-lan1
        Vol. 23, Issue 3, Pages: 5-8(2009) DOI: 10.19455/j.mcgy.2009.03.002
        摘要：Conventional hot pressing has been commonly used in manufacturing thin medium density fiberboard.However,when manufacturing thicker medium density fiberboard,it is found to take a longer pressing cycle to transfer the heat from the surfaces of the panel to the core.The steam injection-vacuum hot pressing technique was developed to improve pressing efficiency and productivity.This steam injection-vacuum technique was modified and adopted in this study to accommodate a domestic medium density fiberboard production line.It was found that this modified line had improved production capacity and the performance of products,with nominal thicknesses of 30 mm and 35 mm,exceeded the specifications ofChina’s national MDF product standard GB/T 11718-1999.  
        关键词：steam injection-vacuum hot pressing;thick MDF;pressing time   
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        发布时间：2021-02-08
      • LEI Ya-fang1,ZHOU Wei2,LIU Yan-zhen3
        Vol. 23, Issue 3, Pages: 9-12(2009) DOI: 10.19455/j.mcgy.2009.03.003
        摘要：To reduce the cost of cork-based panels,lower cost Eulaliopsis binata fiber was used as a substitute and mixed with cork to make low density cork and Eulaliopsis binata fiber composite.The effects of four selected processing parameters（ratio of Eulaliopsis binata fibers,glue content,pressing temperature,and pressing time） on water resistance,tensile strength,condensability,and rebound elasticity were evaluated.The result showed that the optimized parameters included 20% fiber ratio,8% glue content,150 ℃ pressing temperature,and 15 minute pressing time.  
        关键词：cork;Eulaliopsis binata;composite;physical and mechanical property   
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        发布时间：2021-02-08
      • ZHOU Yong-dong,JIANG Xiao-mei,LIU Jun-liang
        Vol. 23, Issue 3, Pages: 13-15(2009) DOI: 10.19455/j.mcgy.2009.03.004
        摘要：Plantation grown populus tomentosa lumber was dried using three different methods: air drying,conventional drying,and high temperature drying.The mechanical properties of the dried lumber were evaluated and the effects of the different drying methods on the lumber performance were examined and compared.The mechanical properties measured in this study included modulus of elasticity（MOE）,modulus of Rupture（MOR）,toughness,and hardness,The results showed that both of the average MOE and MOR values of the three drying methods were about the same,but the average values of toughness and hardness were evidently influenced by high temperature drying.The results would help lumber drying manufacturers to choose a reasonable drying method to improve the value of plantation grown poplar lumber.  
        关键词：Air drying;conventional drying;high temperature drying;Poplar;mechanical property   
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        发布时间：2021-02-08
      • CHENG Liang1,WANG Xi-ming1,YU Yang-lun2
        Vol. 23, Issue 3, Pages: 16-19(2009) DOI: 10.19455/j.mcgy.2009.03.005
        摘要：Glue immersion is an important process that influences the properties of reconstituted bamboo lumbers.The authors selected dendrocalamopsis oldhami,a kind of bamboo,and investigated the effects of three glue immersion parameters including glue solids content,immersion pressure,and immersion time on the bamboo composite.The results indicated that: 1) The properties of reconstituted bamboo lumber decreased as the glue solids content was reduced;2) The immersion pressure affected glue penetration into the bamboo bundles and high immersion pressure increased the glue consumption;3) the longer immersion time didn’t affect bending properties,but could improve internal bonding.  
        关键词：reconstituted bamboo lumber;Dendrocalamopsis oldhami;glue immersion;physical and mechanical performance   
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        发布时间：2021-02-08

        Review

      • XIE Li-sheng
        Vol. 23, Issue 3, Pages: 20-23(2009) DOI: 10.19455/j.mcgy.2009.03.007
        摘要：The culture and technology of Japanese wood structures is well-known in the world.However,the development of Japanese wood structures has experienced many up and down periods,especially during the period of reconstruction following natural disasters such as destructive earthquakes and typhoons.This paper summarizes the Japanese literature of wood structures and the observations of the author’s two visits to Japan.Hopefully,the history and development of Japanese wood structures will provide useful information for Chinese researchers in developing Chinese wood product specifications and structural standards.  
        关键词：Japan;wood structure;wood-based building materials;engineered wood   
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        发布时间：2021-02-08

        Discussion & Suggestion

      • GU Lian-bai,ZHUANG Shou-zeng
        Vol. 23, Issue 3, Pages: 24-27(2009) DOI: 10.19455/j.mcgy.2009.03.008
        摘要：The wood drying industry plays an important role in the development of the wood product industry in China.This paper presents a review of the latest technology and product development in the wood drying industry.Furthermore,some of the key barriers in promoting sustainable wood products are identified and the technological demands for China’s wood drying industry are discussed.Finally,research tasks during the next National Twelfth Five-Year Plan period are proposed and the expected economic benefits are analyzed.  
        关键词：wood drying;industry status;technological demands   
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        发布时间：2021-02-08
      • ZHANG Hong-jian
        Vol. 23, Issue 3, Pages: 28-30(2009) DOI: 10.19455/j.mcgy.2009.03.009
        摘要：This paper presented the current status,development history,specific features,and the problems of the wood products industry in Southwest China.The author also analyzed the technological demands,development of niche products,and product competitiveness.It suggested innovation and correct economic policies would play a key role in this ecologically sensitive area.  
        关键词：wood industry;southwest China;circular economy   
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        发布时间：2021-02-08
      • XU Man-ping,FANG Chong-rong,GUO Fei-yan
        Vol. 23, Issue 3, Pages: 31-33(2009) DOI: 10.19455/j.mcgy.2009.03.010
        摘要：Blockboard,a panel in which wood strips are bonded together and sandwiched between two layers of wood veneer,is popular in the wood product market.Zhejiang is one of the largest provinces in China to produce blockboards.Results of a five-year test on the blockboards produced in Zhijiang was collected and summarized in this paper.Statistical analysis on quality of the blockboard products was presented.The results will provide guidance for blockboard manufacturers to improve product quality and performance.  
        关键词：Zhejiang Province;blockboard;quality;countermeasure   
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        发布时间：2021-02-08
      • MA Xing-xia1,YANG Zhong1,JIANG Ming-liang1,LIU Lei2,SU Hai-tao2
        Vol. 23, Issue 3, Pages: 34-36(2009) DOI: 10.19455/j.mcgy.2009.03.011
        摘要：The national standard "Method for laboratory test of natural decay resistance of woods"（GB/T 13942.1-1992） has been in effect for sixteen years.There are some problems that have been identified in the field regarding utilization of the standard in the wood industry.A laboratory test of wood decay resistance to Gloeophyllum trabeum（Pers.ex Fr.） Murr.was conducted and compared with wood decay resistance on other two molds required by the standard.The result indicated that the performance of three fungi on wood decay was similar and Gloeophyllum trabeum（Pers.ex Fr.） Murr.could be added to the fungi list required by the standard.  
        关键词：Chinese national standard;wood;nature decay resistance;laboratory test   
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        发布时间：2021-02-08

        Piactical Techniques

      • DUAN Hai-yan1,WU Zhi-hui2,ZHANG Zhao1
        Vol. 23, Issue 3, Pages: 37-39(2009) DOI: 10.19455/j.mcgy.2009.03.012
        摘要：Integrating intelligent furniture with traditional furniture technology,and built-in information and automatic control technology,will be getting more popular in the furniture industry.The authors presented the needs of,and markets for,intelligent furniture.To eliminate the damage caused by mold and insect infestation,an intelligent wardrobe with automatic dehumidification and sterilization capabilities was designed in this study.  
        关键词：intelligent;wardrobe;design   
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        发布时间：2021-02-08
      • LI Long-zhe1,YANG Cai-xi2,SONG Zuo-mei2,QIN Shao-shan2,LIU Jun-liang2
        Vol. 23, Issue 3, Pages: 40-42(2009) DOI: 10.19455/j.mcgy.2009.03.013
        摘要：Heat treatment of wood under about 200 ℃ for a short period of time is a commonly used method to improve its durability and dimensional stability.However,the mechanical strength of wood after heat treatment usually decreases and the loss of strength has a negative effect on the application of heat-treated wood.To compensate for the strength loss,the authors impregnated melamine urea-formaldehyde resin into wood before the heat treatment.The results showed that this combined treatment（resin impregnation and heat treatment） not only improved wood dimensional stability and durability,but also prevented the loss of mechanical strength.  
        关键词：melamine urea-formaldehyde（MUF） resin;resin impregnation;heat treatment;wood;mechanical properties   
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        发布时间：2021-02-08
      • ZHANG Ji-juan,ZHANG Zhong-feng
        Vol. 23, Issue 3, Pages: 43-45(2009) DOI: 10.19455/j.mcgy.2009.03.014
        摘要：Wood-based composite doors are increasingly visible in the market and have gained favorable preference from consumers.Doors made from wood-based composites have advantages over ones made of solid wood such as better performance and lower cost.A door made with ordinary finger-jointed wood for its frame,medium density fiberboard for its substrate,and sliced veneer from precious wood species for its faces,was developed in this study.A detailed description of the structure,process,and improvements regarding the wood composite door was also presented.  
        关键词：composite door;structure;Processing technology   
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