最新刊期
      期 4 ， 2015

        Research & Development

      • WU Yu-zhang,LV Jian-xiong,LI Jian
        Vol. 29, Issue 4, Pages: 5-8(2015) DOI: 10.19455/j.mcgy.2015.04.001
        摘要：Phenol-formaldehyde resin（PF）solutions were prepared to impregnate poplar veneers（air-dry and water-saturated）using a roller-press.Effects of technological parameters on veneer weight percent gain（WPG）were investigated.The results showed that using a roller-press was an effective method to impregnate liquid PF resins into both air-dry and water-saturated poplar veneers.WPG in both air-dry and water-saturated poplar veneers increased with higher roller press compression ratio and longer soaking time.More roller pressing cycles could help improve WPG of the poplar veneers,but might result in damage to the poplar veneers if more than 5cycles were used.The WPG of the poplar veneers was affected by linear velocity of the rollers and the WPG was lower with higher roller speed.  
        关键词：veneer;liquid impregnation;roller-press;compression   
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        发布时间：2021-02-08
      • QUE Ze-li,ZHAO Xiao-xu,LI Zhe-rui,PAN Biao,ZHU Yi-xin
        Vol. 29, Issue 4, Pages: 9-13(2015) DOI: 10.19455/j.mcgy.2015.04.002
        摘要：The authors developed a new kind of electrically heated flooring using hexagon glulam made with small-diameter Chinese fir as the core and base the layers with carbon fiber electric heating wires laid between the layers.Heat conductivity and dimensional stability of the flooring were tested.The results showed that the carbon fiber electric heating wires were effective.The peak temperature of the samples could reach 3035 ℃ in 30 minutes with good temperature uniformity.A higher voltage could increase the peak temperature of the flooring.The flooring assembly method had little effect on the surface temperature and dimensional stability but could affect heat transfer stability.  
        关键词：small diameter;Chinese Fir;hexagon glulam;electrically heated flooring;carbon fiber electric heating wire   
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      • LU Jun,YUAN Na-xin,WANG Ming-feng,LI Shi-bo,SUN Wan-li,WANG Yi-dan
        Vol. 29, Issue 4, Pages: 14-17(2015) DOI: 10.19455/j.mcgy.2015.04.003
        摘要：In order to make use of waste medium density fiberboard（MDF）,a new kind of composite was manufactured from waste MDF and phenol-formaldehyde resin（PF）.Thermal analysis of the new composite was carried out by thermogravimetry（TG）and differential scanning calorimetry（DSC）.The results showed that flame retardancy of the composite was significantly improved,compared with controls.  
        关键词：waste medium density fiberboard;phenol-formaldehyde resin;composite;flame retardancy;TG;DSC   
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      • SHI Bai-nan,ZHANG Xin-pei,YE Yong
        Vol. 29, Issue 4, Pages: 18-21(2015) DOI: 10.19455/j.mcgy.2015.04.004
        摘要：An experiment was designed to measure nail strength of metal-plate-connected joints under forces parallel and vertical to wood grain.SPFⅡ dimensional lumber with living or dead knots and domestic truss plates were selected.The results showed that the living knots enhanced the nail bearing capacity,while the dead knots impaired the nail bearing capacity when the percentage of invalid tooth number exceeded 15%.Under the force parallel to wood grain,the nail bearing capacity of the joints with dead knots was even decreased when the percentage of invalid tooth number was more than 11%.  
        关键词：truss plate;Connection;dimension lumber;living knot;dead knot;nail;bearing capacity   
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        发布时间：2021-02-08

        Discussion & Suggestion

      • GUO Xu-xia,GUO Juan,LU Yun,YIN Ya-fang,LI Gai-yun
        Vol. 29, Issue 4, Pages: 22-25(2015) DOI: 10.19455/j.mcgy.2015.04.005
        摘要：To promote utilization of cellulose nanocrystals（CNC）products,there is an increasing need for controlling CNC size distribution.In this article,recent developments regarding effects of raw materials, processing conditions and post-treatments on CNC sizes as well as CNC morphological detection were summarized.Furthermore,suggestions were made on future work in the field.  
        关键词：cellulose nanocrystals（CNC）;size control;post-treatment;size detection   
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      • ZHANG Yu-ping,LIU Jun-liang,LV Bin
        Vol. 29, Issue 4, Pages: 26-30(2015) DOI: 10.19455/j.mcgy.2015.04.006
        摘要：Thermal modification is one of the important methods for wood modification.Standards between China and European covering classification,appearance quality,performance requirements and testing methods for thermal modification timber were compared and discussed.Suggestions on revising the standard were also presented,based on the above work.  
        关键词：thermal modification timber;standard;European;China   
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        发布时间：2021-02-08

        Piactical Techniques

      • QI Liang,YAN Ping,ZHAO Ye-mei,CAO Wei-wu
        Vol. 29, Issue 4, Pages: 31-35(2015) DOI: 10.19455/j.mcgy.2015.04.007
        摘要：To improve uneven airflow circulation in roof ventilated wood drying kilns,the authors designed two devices.One had horizontal-vertical airflow guidance devices which were installed on the top corner of the kilns,and the other had an adjustable vertical airflow guidance device which was set on the side airway in the kilns.The results showed that average airflow speed and uniform velocity in the air distribution field in the kilns were improved significantly with a shorter drying cycle and better production efficiency.  
        关键词：wood drying;airflow circulation;airflow guidance devices;roof ventilator kilns   
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      • ZHANG Yan-juan,LIN Lan-ying,FU Feng
        Vol. 29, Issue 4, Pages: 36-39(2015) DOI: 10.19455/j.mcgy.2015.04.008
        摘要：A silica sol/acrylate emulsion was prepared to impregnate Chinese fir.Effects of impregnating pressure and duration on properties of the modified wood were evaluated.The results showed that silica sol/acrylate emulsion entered into the wood under pressure and was then cured and filled in the gaps of the wood.Compared with untreated wood,mechanical properties of the modified wood were increased due to new chemical bonding.The optimum modification parameters obtained were impregnating pressure of 1.0 MPa maintained for 90 minutes.  
        关键词：silica sol/acrylate emulsion;Chinese Fir;impregnation   
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      • CHEN Xiu-lan,WANG Jun-wei,ZHU Guang-hua,CUI Ju-qing
        Vol. 29, Issue 4, Pages: 40-42(2015) DOI: 10.19455/j.mcgy.2015.04.009
        摘要：采用三聚氰胺改性脲醛（MUF）树脂生产中纤板（MDF）,检测树脂中不同三聚氰胺添加量时MDF试板的各项性能指标。结果表明:三聚氰胺添加量对试板防潮性能的影响显著,随着三聚氰胺添加量的增加,试板的24h吸水厚度膨胀率呈降低趋势,湿静曲强度和内结合强度逐渐增加;在一定范围内,建立的线性回归方程可用于预测MDF的防潮性能。  
        关键词：三聚氰胺;改性;脲醛树脂;防潮性能;中密度纤维板   
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        发布时间：2021-02-08
      • LIANG Xiang-peng,YANG Ya-feng,CHEN Guang-hui,LI Jiang-xiao,CHEN Zhi-lin,YANG Hong-qi
        Vol. 29, Issue 4, Pages: 43-46(2015) DOI: 10.19455/j.mcgy.2015.04.010
        摘要：为拓展中密度纤维板（MDF）的应用领域,在其表面贴覆铝箔,制备铝箔贴面中密度纤维。贴面MDF阻燃性能的检测结果表明:其阻燃性能较MDF素板有明显提高。  
        关键词：铝箔;中密度纤维板;贴面;阻燃性能   
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        发布时间：2021-02-08
      • ZENG Xiang-ling,GAO Qiang,LI Li,LI Jian-zhang
        Vol. 29, Issue 4, Pages: 47-50(2015) DOI: 10.19455/j.mcgy.2015.04.011
        摘要：为探寻豆胶杨木胶合板耐老化性的检测方法,分别以改性和未改性的豆胶制备杨木胶合板,以三聚氰胺改性脲醛（MUF）胶胶合板作为对照试样,采用笔者设计的干湿循环加速老化法,及将试件置于室内和室外自然条件下一年的自然老化法,进行老化试验。结果表明:改性豆胶胶合板的耐老化性能比未改性豆胶提高约1倍,且明显高于MUF胶胶合板;两个加速老化循环后,改性豆胶胶合板的老化程度与室外放置一年相当。  
        关键词：豆胶;耐老化性能;改性;杨木胶合板;干湿循环加速老化法   
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      • SUN Bai-ling,FU Yue-jin,GAO Ya,CHENG Xian-bao,JI Juan
        Vol. 29, Issue 4, Pages: 51-53(2015) DOI: 10.19455/j.mcgy.2015.04.013
        摘要：为了提高三层实木复合地板的性能,对柞木面板进行热处理,分析热处理工艺对柞木表面性能及地板面层胶合强度的影响。结果表明:随着热处理温度升高,热处理柞木的亲水性降低;地板面层的胶合强度随热处理温度升高而降低,但浸渍剥离性能可满足GB/T 18103-2013《实木复合地板》的要求。  
        关键词：柞木;热处理;接触角;三层实木复合地板;胶合性能   
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      • LU Ze-guang,WANG Meng,JIA Wan-da,MAO An
        Vol. 29, Issue 4, Pages: 54-55(2015) DOI: 10.19455/j.mcgy.2015.04.014
        摘要：山东省胶合板产业以普通脲醛胶杨木胶合板为主要产品,产量虽逐年递增,但利润率较低。人才短缺、资金匮乏、设备陈旧、研发力量薄弱等因素,制约了山东省胶合板产业的发展。建议建立木材加工人员培训基地,搭建产学研合作平台,提升企业的创新能力,开发高附加值产品,从而实现山东省胶合板产业的升级换代。  
        关键词：山东省;胶合板;原材料   
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      • Vol. 29, Issue 4, Pages: 56-57(2015) DOI: 10.19455/j.mcgy.2015.04.017
        摘要：<正>2015年6月,由中国林科院木材工业研究所、中国林学会木材工业分会、木竹产业技术创新战略联盟主办,江苏怡天木业有限公司和中国林科院木材工业研究所木质功能材料研究室承办的"2015全国木质功能材料与制品技术论坛"在江苏常州召开。本次会议的主题是"电热地板发展现状与趋势",来自国内电热地板产业上下游及相关行业的80余位代表参加会议。  
          
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      • Vol. 29, Issue 4, Pages: 57-58(2015) DOI: 10.19455/j.mcgy.2015.04.019
        摘要：<正>2015年5月15日,2015汉诺威国际林业木工展览会（LIGNA）落下帷幕。1 567家展商在超过12万m2的展区内展出了先进技术以及创新型生产设备。本届展会的观众共计9.6万名,其中来自亚洲的观众数量由2013年的2 800人增至今年的4 700人;中东地区的观众人数增长86%;南美与中美洲地区的观众增加了近1000名。德国汉诺威展览公司负责LIGNA展的常务董事Jochen Kockler博士表示,创新技术是通向成功的  
          
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      • Vol. 29, Issue 4, Pages: 58-59(2015) DOI: 10.19455/j.mcgy.2015.04.020
        摘要：<正>中国林产工业协会于2015年5月,组织专家对广东盈然木业有限公司、圣象集团有限公司及南京林业大学等单位开发的三项产品进行了新产品鉴定。鉴定委员会成员认真听取了研发单位的汇报,审阅了鉴定材料,查验了新产品样品,听取了研发单位对专家质疑的解释说明,一致同意这三项产品通过新产品鉴定。1刺槐集成实木地板该产品由广东盈然木业有限公司和中山市国立木业有限公司共同研发,选择非常用树种刺槐,研  
          
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      • Vol. 29, Issue 4, Pages: 59-60(2015) DOI: 10.19455/j.mcgy.2015.04.021
        摘要：<正>统计数据显示,2015年1-3月,受经济增速放缓及房地产业持续滑坡等因素影响,我国原木进口和人造板出口困难加大,企业产量下降,库存增大,部分企业停产。1木材及木制品进口1)原木2015年一季度,我国原木消费量大幅下降,导致进口量明显下降,原木进口量累计1069.78万m3,其中3月份进口原木444.99万m3,同比下降15.2%,进口量减少191.32万m3。在进口原木国家中,传统原木进口大国的进口  
          
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      • Vol. 29, Issue 4, Pages: 63-64(2015) DOI: 10.19455/j.mcgy.2015.04.026
        摘要：<正>芒种刚过的常州,细雨绵绵,带来阵阵湿润清爽。2015年6月8日,温康纳（常州）机械制造有限公司十周年庆典暨温康纳中国第二家子公司奠基仪式,在江苏省常州市开发区隆重举行,成立10年来的持续稳步发展,使温康纳公司又迈出了崭新的一步。上午11时,奠基仪式开始,红色地毯铺在刚刚收割完毕,露着黄色麦茬的工地上,隆隆锣鼓和鞭炮声中,温康纳公司董事长海纳温康纳先生、温康纳常州公司总经理贺旭锋先生,陪同德国海尔福特  
          
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