最新刊期
      期 5 ， 2016

        Research & Development

      • WANG Li,WANG Zi,DING Qing-feng,WU Yong,ZHONG Yong,ZHAO Rong-jun
        Vol. 30, Issue 5, Pages: 5-8(2016) DOI: 10.19455/j.mcgy.20160501
        摘要：In order to promote application of domestic truss plate used for light frame wood construction,the authors selected three types of domestic truss plates and an imported truss plate as control to evaluate their ultimate bearing capacity, critical slip stiffness, failure forms, ductility and stress-strain changes in tensile process. The results showed that the ductility of the three domestic truss plates was all superior to the control and that the domestic truss plates with indentation showed the best single-tooth bearing capacity. Indentation or extension fringe tooth could improve connection performance of truss plates.  
        关键词：domestic truss plate;indentation;extension fringe tooth;ultimate bearing capacity;failure modes;light frame wood construction   
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      • YAO Xing-zhi,YAO Zi-yin,HE Zheng-bin,YI Song-lin
        Vol. 30, Issue 5, Pages: 9-12(2016) DOI: 10.19455/j.mcgy.20160502
        摘要：Eucalyptus grandis×E. urophylla wood samples were pretreated by ultrasound at 340 W power with frequency of 25 and 59 k Hz for 30, 60 and 90 minutes, respectively, and the effects of ultrasound pretreatment on drying time of the eucalyptus wood samples were investigated. Results indicated that ultrasound pretreatment could decrease drying time and increase water diffusivity of the wood samples.Moreover, drying rates and water diffusivity increased along with increase of ultrasound frequency and pretreatment time. The effect of ultrasound pretreatment on shortening drying time was very obvious when wood moisture content of the samples was above fiber saturation point.  
        关键词：ultrasound;pre-treatment;drying time;water diffusivity;fiber saturation point（FSP）   
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      • ZHAO Xin,ZHAO You-ke,LV Jian-xiong,HUANG Rong-feng,ZHAO Rong-jun,REN Hai-qing
        Vol. 30, Issue 5, Pages: 13-16(2016) DOI: 10.19455/j.mcgy.20160503
        摘要：A Compression pretreatment experiment was conducted to improve the impregnation of small-sized Chinese fir logs. The results showed that compared with the controls, the impregnation amount, the penetration percentage, the ratio of penetration area and the relative dyeing depth of the pre-compressed products increased by 21.83 kg/m3, 8.21%, 24.49% and 39.23%, respectively. It can be concluded that the compression pretreatment could improve impregnation of the small-sized Chinese fir logs significantly.  
        关键词：Chinese Fir;small-sized logs;compression pretreatment;impregnation   
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      • LU Jun,WANG Yu,YUAN Na-xin,WANG Yi-dan,SUN Wang-li,FENG Hao
        Vol. 30, Issue 5, Pages: 17-19(2016) DOI: 10.19455/j.mcgy.20160504
        摘要：Powdery phenol-formaldehyde（P-PF） and waste wood powders were mixed and then hot-pressed into PF/Wood composites. Decay resistance and anti-mold as well as anti-blue stain tests were carried out in both laboratory and the field. The results showed that when the ratio of P-PF powders to wood powders ratio was 2∶8, the sample showed the best mechanical properties and decay resistance.  
          
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        发布时间：2021-02-08

        Discussion & Suggestion

      • BAI Jia-wei,JIANG Guo-yu,LI Wei,CHEN Xu-hui
        Vol. 30, Issue 5, Pages: 20-23(2016) DOI: 10.19455/j.mcgy.20160505
        摘要：To promote implementation of the National Standard GB/T 17657-2013, the 2013 version and1999 version of GB/T 17657 were compared. Formaldehyde emissions from blockboard, plywood and wooden door sheets were tested by desiccator methods according to the new and old version of the standard. The results indicated that the new version of the standard was more systematical and comprehensive by clarifying requirements of sample numbers, conditioning, blank test, formaldehyde solution storage conditions and chromogenic reaction. They concluded that the new version had higher testing accuracy and was easy to be standardized.  
        关键词：formaldehyde emission;standard;desiccator method;quality testing   
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      • REN Liang,YAN Huai-yu,KONG Ping,LI Zi-hao,WANG Qi
        Vol. 30, Issue 5, Pages: 24-26(2016) DOI: 10.19455/j.mcgy.20160506
        摘要：In order to improve extraction efficiency of perforator apparatus for detecting formaldehyde emissions from wood-based panels, the apparatus structure was improved. Testing results showed that extraction efficiency of the improved apparatus was significantly increased by reducing extraction time from 120 min to 60 min. And the absolute deviation, relative deviation and variation coefficient were0.40.6 mg/100 g, 1.7%2.9% and 1.3%1.8%, respectively.  
        关键词：wood-based panels;formaldehyde emissions;perforator apparatus;efficiency   
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      • DONG Chun-lei,ZHENG Zhi-feng,YANY Dong-jie,LIU Xiang-fei,ZHOU De-quan
        Vol. 30, Issue 5, Pages: 27-30(2016) DOI: 10.19455/j.mcgy.20160507
        摘要：Due to limits of designing concepts, processing techniques and intelligent/universalized equipments, archaic wood buildings in China are still designed with traditional methods and mostly manufactured by hand. Taking a four corner archaized pavilion as example, solutions for designing and manufacturing archaized wood buildings with advanced manufacturing technology were introduced  
        关键词：archaized wood building;design;advanced manufacturing technology   
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      • ZHANG Ya-hui,ZHANG Ya-mei,REN Ding-hua,YU Wen-ji
        Vol. 30, Issue 5, Pages: 31-34(2016) DOI: 10.19455/j.mcgy.20160508
        摘要：The authors made scrimbers with 1.05 and 1.10 g/cm3 densities by cold-pressing and hot-pressing methods respectively in a production line. The results showed that both of the scrimber products made by cold-pressing and hot-pressing methods had high physical and mechanical performance.The scrimber produced by cold-pressing had superior water resistance and the scrimber produced by hot-pressing had superior bending and shear strengths.  
        关键词：scrimber;cold pressing;hot pressing;water resistance;mechanical properties   
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      • Vol. 30, Issue 5, Pages: 47-48(2016)
        摘要：<正>中国产业技术创新战略联盟协同发展网（简称"联盟协发网"）组建工作启动会,近期在科技部召开。科技部创新发展司、试点联盟联络组、参与发起筹备工作的16家联盟负责人参加了会议。会议讨论并通过了联盟协发网章程、理事会组成（临时）,并进行了分工。木竹产业技术创新战略联盟作为发起单位之一,将参与联盟协发网秘书处  
          
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      • Vol. 30, Issue 5, Pages: 49-50(2016)
        摘要：<正>会议主题:生产专业化发展产业化2016年9月2527日,烟台集成材是高性能、高价值木材综合利用产品之一,可实现劣材优用、小材大用,在实木家具、橱柜、木门窗及木结构制造等领域广泛采用。随着国内市场需求旺盛,集成材已从木制品加工中间产品,逐步发展成  
          
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        发布时间：2021-02-08

        Piactical Techniques

      • ZHANG Xiao-chun,XU Jun-ting,JIANG Shen-xue,ZHU Yu-ding
        Vol. 30, Issue 5, Pages: 35-37(2016) DOI: 10.19455/j.mcgy.20160509
        摘要：Heat-treated bamboo bundles were used to make a reconstituted bamboo by hot pressing. The effects of heat-treating temperature of the bamboo bundles on equilibrium moisture content（EMC） and dimensional stability of the reconstituted bamboo samples were investigated. The results showed that heat-treatment reduced EMC of the reconstituted bamboo samples significantly and the EMC decreased and the dimensional stability of the samples was improved with the increase of heating temperature.  
        关键词：reconstituted bamboo;bamboo bundles;heat treatment;equilibrium moisture content;dimensional stability   
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        发布时间：2021-02-08
      • PANG Xiao-ren,GU Shui-xiang,XIONG Xian-qing,WU Zhi-hui
        Vol. 30, Issue 5, Pages: 38-40(2016) DOI: 10.19455/j.mcgy.20160510
        摘要：为提高桉木的利用率和产品附加值,用桉木单板和玉米改性淀粉胶压制单板层积材,并以此作为基材制备实木复合地板,探讨单板热压预处理、厚度和组坯结构等因素对实木复合地板产品性能的影响。结果表明,对厚度≤2.2mm桉木单板,经12 min的热压预处理（温度100120℃,压力0.83 MPa）,制备的实木复合地板尺寸稳定性良好,主要理化性能指标达到GB/T 18103-2000《实木复合地板》的要求。  
        关键词：按木;单板层积材;实木复合地板;热压;优化工艺   
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      • MA Tao,XU Bo-ming
        Vol. 30, Issue 5, Pages: 41-44(2016) DOI: 10.19455/j.mcgy.20160511
        摘要：As a new type of decorative materials, wooden mosaic made of small diameter timber developed fast and got more popular recently. The authors introduced manufacturing technology and quality specifications of the new wooden mosaic product, and analyzed development trends according to the advantage of the unique interior decorative performance and higher wood utilization efficiency.  
        关键词：wooden mosaic;small diameter timber;manufacturing technology;quality   
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