最新刊期
      期 1 ， 2017
      • WU Guo-fang,REN Hai-qing,ZHOU Hai-bin,ZHONG Yong,XING Xin-ting,ZHAO Rong-jun
        Vol. 31, Issue 1, Pages: 5-8(2017) DOI: 10.19455/j.mcgy.20170101
        摘要：Background,objectives and technical processes of the Research Project "Manufacturing and Evaluation of Structural Wood-based Composite Meterial and Members" were introduced. Design method for domestic dimension lumber and oriented strand board,manufacturing technology and the evaluation method for domestic light wood frame trusses and structural insulated panels were reviewed. The project aims to enhance manufacturing ability of domestic wood materials and members,to provide guidelines and technical support for utilizing domestic wood materials in structural applications and to promote localization of light wood frame construction in China.  
        关键词：light wood frame construction;dimension lumber;oriented strand board;light wood truss;structural insulated panel   
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      • YUE Qun-fei,QU Guo-fu,WANG Xue-ping,JIAO Hai-liang,ZHU Jun,SHENG Zhen-xiang
        Vol. 31, Issue 1, Pages: 9-14(2017) DOI: 10.19455/j.mcgy.20170102
        摘要：Compared with flexible infeed of existing continuous presses and aimed at improving adaptiveness of infeed curve,fast pressure building-up and displacement control accuracy,the authors developed a new type of flexible infeed. By calculation and experimental analysis,the new structure of the flexible infeed was successfully applied in continuous presses made in China.  
        关键词：continuous press;flexible infeed;screw pair;curvature radius;upper roller   
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      • ZHANG Ya-hui,WEI Ya-nan,YU Wen-ji
        Vol. 31, Issue 1, Pages: 46-49(2017) DOI: 10.19455/j.mcgy.20170110
        摘要：Scrimber samples were made of crushed poplar wood veneers in thicknesses from 4 to 8 mm.Bending strength,shearing strength and water resistance of the samples were tested. The results showed that with the increase of the veneer thickness,bending strength and shearing strength of the scrimber samples decreased slightly while thickness swelling rate of the scrimber samples decreased at the beginning and then increased later slightly,and width swelling rate and water absorption rate gradually decreased gradually. Water resistance was the best with of the scrimber samples made of from crushed 6mm thick veneers in 6 mm thick was the best.  
        关键词：Populus wood;scrimber;crushed veneers;thickness;properties   
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      • Vol. 31, Issue 1, Pages: 58-59(2017)
        摘要：<正>"十三五"国家重点研发计划"木材工业节能降耗与生产安全控制技术"专项下设研究课题,2016年11-12月分别在广州、南京、嘉善、丹阳陆续启动。"木质家居材料健康安全性能检测与评价技术"课题启动会由课题承担单位——中国林科院木材工业研究所主办,索菲亚家居承办,东北林业大学、黑龙江省木材工业研究所、索菲亚家居、吉林森工  
          
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      • Vol. 31, Issue 1, Pages: 60-61(2017)
        摘要：<正>由中国林产工业协会、贵港市人民政府和广西区林业厅联合主办的"2016中国（贵港）木材加工产业发展高峰论坛",于2016年12月在广西贵港举行。产业链上下游企业、林业系统的350余人到会。围绕"绿色发展,转型升级"的主题,中国工程院院士张齐生教授及来自科研、设计单位的行业  
          
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      • Vol. 31, Issue 1, Pages: 65-67(2017)
        摘要：<正>20年前,丰林的创业者们落户南宁,从一台多层国产压机起家,开始了进军人造板行业的艰苦征程。20年里,丰林人脚踏实地,以人为本,匠心精造,艰苦奋斗,创新进取,成功实现了人造板行业"中国领先"的第一个目标。为了分享成功的喜悦,共谋  
          
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        Research & Development

      • CHAI Yu-bo,LIU Jun-liang,LV Wen-hua
        Vol. 31, Issue 1, Pages: 15-18(2017) DOI: 10.19455/j.mcgy.20170103
        摘要：In this study,plantation poplar wood samples were acetylated with acetic anhydride and then densified by hot pressing along the transverse direction. The effects of weight percentage gain（WPG）,compression rate,hot pressing time and hot pressing temperatures on physical and mechanical properties of the samples were investigated. Results showed that the acetylated wood with 20.56% WPG at 180°C for60 min to a 40% compression rate showed superior physical and mechanical properties as well as less compression rebound. The finished product could be used for manufacturing solid wood floors,furniture and plank road.  
        关键词：poplar wood;acetylation;hot compressing;deformation recovery rate;mechanical properties   
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      • ZHAO Xin,ZHAO You-ke,LV Jian-xiong,HUANG Rong-feng,ZHAO Rong-jun,REN Hai-qing
        Vol. 31, Issue 1, Pages: 19-22(2017) DOI: 10.19455/j.mcgy.20170104
        摘要：To shorten air drying time and prevent blue stain for high moisture content（MC） wood,two dimensions of full-size Poplar lumbers were pre-treated using a compression device developing a 40%.compression ratio. After four compressing cycles,moisture content of the lumber samples reduced quickly from initial 175% to 105%109%. It was observed that moisture contents declined dramatically by48%57% following the first compression. Mechanical properties of the compressed lumber samples were tested. The results showed that the compression technique could be used in pre-treatment for full-size lumber drying.  
        关键词：Poplar;lumber;full-size;compression;pre-treatment;moisture content;mechanical properties   
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      • GAO Jian,HUANG Su-yong,REN Hai-qing,ZHONG Yong
        Vol. 31, Issue 1, Pages: 23-26(2017) DOI: 10.19455/j.mcgy.20170105
        摘要：Two types of nails（circle nail and twist nail）,and four different thicknesses of oriented strand board（OSB） specimens were selected for testing their nail pulling resistance and lateral nail holding abilities. The results indicated that the nail holding ability of the OSB was from 0.2231.156 k N,while the lateral nail holding ability was from 1.383 2.678 k N. Both the pulling resistance and lateral nail holding abilities were enhanced with the increase of the OSB thickness. For the two types of nails,the nail holding ability for twist nail was higher than that for circle nail. Furthermore,there were significant differences between different test groups.  
        关键词：light wood structure;oriented strand board;twist nail;circle nail;anti-pulling nail holding ability;lateral nail holding ability   
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        发布时间：2021-02-08
      • WU Guo-fang,GONG Ying-chun,WANG Zhao-hui,XING Xin-ting,ZHAO Rong-jun,REN Hai-qing
        Vol. 31, Issue 1, Pages: 27-31(2017) DOI: 10.19455/j.mcgy.20170106
        摘要：Shear wall is the main element to resist lateral force in Japanese-style post-and-beam structures,whose performance is affected by nail connections. Specimens of sheathing nail connections were manufactured based on Japanese-style shear wall and tested in monotonic and cyclic loading in groups.Load-displacement curves and bearing capacity were recorded during failure. The load-displacement curves and skeleton curves of the hysteresis curves were then fitted by an exponential function using the least square method. We found that performance of the nail connections with Larch plywood and Radiata pine/Poplar combination plywood all worked very well with similar bearing capacity,but was influenced by loading conditions.  
        关键词：Japanese-style timber structure;shear wall;nail connection;cyclic loading test   
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        Discussion & Suggestion

      • HE Ze-sen,SUN Jin,FAN Qi,WANG Zhi-nan,GAO Zhen-zhong
        Vol. 31, Issue 1, Pages: 32-36(2017) DOI: 10.19455/j.mcgy.20170107
        摘要：Starch is a renewable natural polymer material which is synthesized by photosynthesis. The principles,processes and effects on performance of starch-based wood adhesives,such as oxidized starch,esterified starch and graft copolymer starch are presented. The application possibilities,advantages and disadvantages of these processes are analyzed.  
        关键词：wood industry;starch;derivatives;adhesive;modification   
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      • DENG Chao,ZHENG Hong-lian,GU Qiang
        Vol. 31, Issue 1, Pages: 37-40(2017) DOI: 10.19455/j.mcgy.20170108
        摘要：Composite floor products covered with polyvinyl chloride（PVC） sheets are getting more popular in China but relevant product standards including quality evaluation methods need to be established. The authors analyzed characteristics of the floor and proposed quality evaluation methods and requirements. Quality evaluation on the products should include appearance,size,physical properties and environmental impacts etc. to provide references for standard establishment.  
        关键词：polyvinyl chloride;composite floor;substrate;quality evaluation   
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      • HAI Ling-chao,WANG Hong-qiang,JIN Bo,YANG Xue-hui
        Vol. 31, Issue 1, Pages: 41-45(2017) DOI: 10.19455/j.mcgy.20170109
        摘要：The history to standardize reform and the current status of compulsory standards in China were initially defined. Then,based on the requirements for standardizing reform and status of furniture products in China,the authors presented a framework for a compulsory standard system in order to provide a reference for future standardization of China’s furniture industry.  
        关键词：furniture;standard system;compulsory standard;reform   
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        Piactical Techniques

      • PENG Xiao-rui,ZHANG Zhan-kuan
        Vol. 31, Issue 1, Pages: 50-53(2017) DOI: 10.19455/j.mcgy.20170111
        摘要：Low density polyethylene（LDPE） films were selected as a reinforcing and bonding material to prepare flexible decorative veneers. Experiments were carried out to evaluate the effects of pressure,temperature and duration of hot pressing as well as LDPE film thickness on performance of the veneers.Results showed that the optimal processing parameters for making the veneer were 150 ℃ temperature,1.0 MPa pressure and hot-pressing for 120 seconds with 0.03 mm LDPE film thickness. Compared with non-woven fabric reinforced veneers,the veneer had better flexibility,higher peeling strength and transverse tensile strength.  
        关键词：modified low density polyethylene film;red oak（Quercus rubra）;decorative veneer;flexibility;peeling strength   
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      • GAO Wei,PU Jian-jun,YANG Jie,CHEN Qing,SHEN Wan-chun
        Vol. 31, Issue 1, Pages: 54-57(2017) DOI: 10.19455/j.mcgy.20170112
        摘要：To reduce production costs of medium density fiberboard（MDF）,melamine was used to improve urea-formaldehyde resin（E1 grade）,and the curing agents were optimized to match with the modified UF resin. Trial Production results showed that MDF made with the modified UF adhesive by single condensation reaction could meet the requirements of standard GB/T 11718-2009. It was calculated that production capacity could be increased by 21 400 m3 resulting in profit of 3.40 million yuan and that the cost of UF adhesive could be reduced by 3.51 million yuan for a continuous press line with production capacity of 180 000 m3 per year.  
        关键词：UF adhesive;modification;curing agents;properties;cost   
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