最新刊期
      期 3 ， 2017

        Review

      • XU Jun-hua,GONG Ying-chun,REN Hai-qing
        Vol. 31, Issue 3, Pages: 5-9(2017) DOI: 10.19455/j.mcgy.20170301
        摘要：Varieties and characteristics of glulam made of lumber and composites, which are the two typical raw materials for making glulam, were introduced. Then the literature research of manufacturing technologies, physical, chemical and mechanical properties, as well as standards of the glulam in China, were reviewed. Finally applications of the glulam in timber construction in China and abroad were presented.  
        关键词：glulam;timber structure;cross laminated timber;fiber reinforced polymer;glued-in-rod glulam   
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      • WANG Zi,WANG Li,WU Guo-fang,WU Yong,DING Qing-feng,ZHAO Rong-jun
        Vol. 31, Issue 3, Pages: 10-13(2017) DOI: 10.19455/j.mcgy.20170302
        摘要：Dimensional lumber from Larix kaempferi, Larix gmelinii and Picea sitchensis were selected and jointed with domestic truss plates, respectively, to test joint failure, ultimate load carrying capacity and ductility of the jointed components. Testing results indicated that with loading parallel to wood grain, Larix gmelinii dimension lumber joints presented the highest ultimate load carrying capacity and the Picea sitchensis dimension lumber joints showed the lowest. Under loading vertical to wood grain, Larix kaempferi dimension lumber joints presented the highest ultimate load carrying capacity and Larix gmelinii dimension lumber joints showed the lowest.  
        关键词：Larix kaempferi;Larix gmelinii;Picea sitchensis;domestic truss plate;ultimate load carrying capacity   
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      • QU Guo-fu,ZHANG Hong-jian,JIAO Hai-liang,WANG Xue-ping,YUE Qun-fei,SHENG Zhen-xiang
        Vol. 31, Issue 3, Pages: 14-17(2017) DOI: 10.19455/j.mcgy.20170303
        摘要：Based on analyzing working conditions of the hot platens in a continuous press under thermal expansion and position transformation, the authors designed a new structure for the press in compensation for dynamic movement. Frame movement and hot platen joints of the continuous press were presented.  
        关键词：continuous press;hot platen;frame;thermal expansion;dynamic movement   
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      • LIANG Yan-jun,ZHANG Ya-hui,YU Yang-lun,WEI Ya-nan,YU Wen-ji
        Vol. 31, Issue 3, Pages: 40-43(2017) DOI: 10.19455/j.mcgy.20170309
        摘要：The authors made Populus scrimbers by random and parallel forming the wood strands,respectively. The results showed that parallel forming resulted in a reduced molding pressure and shortened pressing time but that there was little effect on mechanical properties and water resistance of the scrimbers even though there was a difference in textures and patterns.  
        关键词：Populus;scrimber;forming;properties   
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      • Vol. 31, Issue 3, Pages: 54-56(2017)
        摘要：<正>木竹联盟理事会暨2017专家会议2017年4月22日,国家木竹产业技术创新战略联盟第二届理事（成员）会第三次会议暨2017年第一次专家委员会会议在浙江南浔召开,来自40家联盟成员单位的100余名代表出席会议。理事会审定了联盟2016年工作总结以及2017年工作计划;批准了书香门地、北新国际木业、鑫鑫木业、天津盛世德和广州酷匠等企业提交的加入联盟申请;与会代表们就木竹产业发展战略与国家"十三五"计划实施、木竹联盟创新机制、活动组  
          
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        发布时间：2021-02-08

        Research & Development

      • WANG Fei,LIU Jun-liang,LV Wen-hua
        Vol. 31, Issue 3, Pages: 18-21(2017) DOI: 10.19455/j.mcgy.20170304
        摘要：Plantation grown Chinese fir samples were treated with a modified melamine urea formaldehyde resin in a progressive gradual infiltration process. Physical and chemical properties of the treated and control samples were tested and compared. The results showed that oven-dry density, bending strength and bending elastic modulus of the treated samples increased with decreased water absorption and improved thermal stability. FTIR and SEM analysis also indicated that the resin modifier was successfully introduced, filled and cured in the wood’s tracheids and pits.  
        关键词：Chinese Fir;melamine urea formaldehyde resin;modification;impregnation;properties   
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      • LIU Mei-hong,PENG Li-min,FU Feng,WANG Dong,SONG Bo-qi
        Vol. 31, Issue 3, Pages: 22-26(2017) DOI: 10.19455/j.mcgy.20170305
        摘要：Medium density fiberboards（MDF） were laminated to a rubber damping core layer on both sides to make a sandwich composite. Testing results showed that resin consumption had a significant effect on elastic modulus（MOE）, bending strength（MOR） and internal bonding strength（IB） of the composite. Hot pressing pressure and time affected MOE and MOR significantly. Sound insulation performance improved by increasing resin consumption. However, the sound insulation performance was negatively affected if the hot pressing pressure was too high, since that decreased the thickness of the rubber damping layer. Sound insulation performance of the composites made by optimized technology was better than that of MDF with the same thickness.  
        关键词：medium density fiberboard;rubber damping material;sandwich composite;mechanical property;sound insulation performance   
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        Discussion & Suggestion

      • SHEN Xiao-shuang,ZOU Xian-wu,LI Gai-yun
        Vol. 31, Issue 3, Pages: 27-30(2017) DOI: 10.19455/j.mcgy.20170306
        摘要：Plantation grown forests have become the main wood resource in China. However, poor properties of the wood from this resource restrict wide applications of the wood. Therefore, it is necessary to carry out modification to improve performance. As an environmentally friendly wood modification technology, wood furfurylation shows unique advantages, such as, being a renewable resource and having low eco-toxicity. A systematic summary on wood modification with furfuryl alcohol resin was presented including modification mechanisms, furfurylation processes, furfurylated wood properties and other relevant factors. Suggestions on wood furfurylation were provided for industrialization of the technology.  
        关键词：wood modification;furfuryl alcohol resin;mechanism;process;properties   
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      • ZHANG Fang-wen,CHEN Shui-long,ZHANG Hai-xiao,YU Wen-ji
        Vol. 31, Issue 3, Pages: 31-34(2017) DOI: 10.19455/j.mcgy.20170307
        摘要：Based on life cycle assessment（LCA）, raw material consumption, energy consumption and environment emissions during production, 1 m3 of oriented strand board（OSB） was analyzed using Gabi ts software. Results showed that acidification effect（AP）, photochemical ozone creation potential（POCP） and global warming（GWP 100） accounted for 52.1%, 23.7% and 20.8% of the total environmental impact. The main environmental influence factors of OSB production, blending, hot pressing and stranding accounted for 28.4%, 18.0% and 16.8%. The input of power and adhesives were key inventory data that had the greatest impact on AP, POCP and GWP 100.  
        关键词：oriented strand board;life cycle assessment（LCA）;inventory analysis;impact assessment   
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      • XU Wei,TAO Xin,WU Zhi-hui,ZHAN Xian-xu,FANG Lu,ZHANG Shuo-pei,YANG Yong
        Vol. 31, Issue 3, Pages: 35-39(2017) DOI: 10.19455/j.mcgy.20170308
        摘要：As new energy-saving and comfortable heating systems have become more common, floor heating systems for wooden flooring has been increasing and is becoming widely used in residential houses in China. The authors summarized floor heating systems for wooden floorings and described heat transfer principles and various structures. They made suggestions for technology development, standard formulations and new material applications for reference to future research and development of floor heating systems for wooden floorings.  
        关键词：floor heating;wooden flooring;radiant   
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        Piactical Techniques

      • CHEN Yu-shu,XU Wen-meng
        Vol. 31, Issue 3, Pages: 44-48(2017) DOI: 10.19455/j.mcgy.20170310
        摘要：The authors reinforced poplar table legs by using double dowel joints and common reinforcing methods. Strength performance and deformation of the legs under uniform vertical load were analyzed. Based on the results, the authors improved reinforcement techniques and showed that by using innovative structures, legs with greater strength could be produced. Furthermore, legs made with the improved reinforcement techniques had higher test results than those made with common reinforcement methods, which means that the improved reinforcement could enhance furniture strength.  
        关键词：Poplar;table leg;reinforcement structure;strength;corner block   
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      • PENG Xiao-rui,ZHANG Zhan-kuan
        Vol. 31, Issue 3, Pages: 49-53(2017) DOI: 10.19455/j.mcgy.20170311
        摘要：The authors developed film-reinforced flexible decorative veneers by using low temperature plasma to improve the interface between red oak veneers and low density polyethylene（LDPE） films and then bonded them together by hot-pressing. Hot-pressing temperature was 150 ℃ and decreased to 120 ℃ after the treatment for the veneers and LDPE films. Optimal manufacturing parameters for making the flexible decorative veneers were 0.6 MPa pressure, 150 seconds hot-pressing and 4 m/min plasma treating. The treated veneers presented better flexibility, higher peeling strength and transverse tensile strength than controls.  
        关键词：low density polyethylene film;flexible decorative veneer;low temperature plasma;peel strength;transverse tensile strength   
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