最新刊期
      期 0 ， 2020
      • Issue 1, Pages: 2-6(1993) DOI: 10.19455/j.mcgy.1993.01.001
        摘要：<正> 高新技术是指在一定时间里产生的新发明、新发现、新创造的技术。而高技术是指那些基本原理建立在最新科学成就基础上,并能形成较高经济效益,具有较高增值作用,能向经济、社会各领域广泛渗透的技术;新技术是相对原有老技术而言,新技术  
          
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      • Guan Ning Shi Jianping
        Issue 1, Pages: 6-10(1993) DOI: 10.19455/j.mcgy.1993.01.002
        摘要：Poplar wood was cut into flakes with which flakeboards then were made and board properties were determined. The main results obtained were: 1) The larger the rake angle the better the rheological and strength properties of the flakes and that of the flakeboards; 2) It was found possible to strengthen knife edge by means of a microbevel so that larger rake angle can be used without being harmful to board properties and too much increasing cutting resistance.  
          
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      • Cai Liping Deng Weiping Liu Zhiqun
        Issue 1, Pages: 11-14(1993) DOI: 10.19455/j.mcgy.1993.01.003
        摘要：Highly dimensionally stable particleboards were experimentally made from chips treated with saturated steam at elevated pressure. The changes of the components of steam treated wood chips of spruce and birch were analysed by infrared in this paper. Infrared spectra demonstrated that the hemicelluloses and hydroxy in steam-treated chips were less than that in untreated chips. This is the main reasons why steam treatment could improve particleboard stability. And also the infrared spectra showed that the reduction of the hemicelluloses and hydroxy in birch chip was more than that in spruce chip under the same condition of steam treatment. Therefore, the stability improvement of steam treated birch particleboard was much greater than that of spruce.  
        关键词：Infrared spectra;Hemicellulose;Hydroxy;Steam treatment   
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      • V.Thole D.Weiss
        Issue 1, Pages: 15-24(1993) DOI: 10.19455/j.mcgy.1993.01.004
        摘要：The semi-dry process for the manufacture of gypsum-bonded particleboards suggested by Kossatz besides the use of wood particles offers also the possibility of employing annual plants for this purpose. Using a Chinese and a German Beta-hemihydrate gypsum plaster the suitability of bagasse, bamboo, cotton stems, rice straw and wheat straw was investigated. Besides phase-analytical investigations regarding the characterization of the binders also the efficacy of various retardants as well as the influence of the different plant substances on the hydration were determined. Test boards of varying formulas and density were manufactured from annual plants in order to evaluate the suitability of same. The considerably retarded hydration of the gypsum plaster which was due to the different plant substances does not necessarily lead to boards with low strength properties as well as a moderate impairment compulsorily leads to boards with high strength properties.As far as the board strength is concerned, equal importance has to be attached to the surface condition of the particles, their spraying behaviour and pore structure, as well as to the fineness ratio of the particles and the portion of plant parts which cannot be broken up to particle-shape structures.  
        关键词：Annual plants;Gypsum particleboard   
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      • Issue 1, Pages: 24(1993) DOI: 10.19455/j.mcgy.1993.01.005
        摘要：<正> 硼基防腐剂具有一定优点,如价格低、对哺乳动物毒性小、能有效防止昆虫和担子菌的侵害,其主要缺点是可浸出性。故被应用于不易受雨水淋失或不过份潮湿的地方。近年来,有采用具有防水和保持尺寸稳定的水溶性聚合物系统。要是这样的处  
          
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      • Wang Ximing Gao Zhiyun
        Issue 1, Pages: 25-29(1993) DOI: 10.19455/j.mcgy.1993.01.006
        摘要：This paper studied on the drying properties of white birch before and after urea modification, the results showed that modified wood’s drying properties are better than natural, such as fast drying speed and high drying quality. The mechanism of improving wood dimensional stability was also investigated.  
          
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      • Li Na He Dinghua Teng Tonglian
        Issue 1, Pages: 30-33(1993) DOI: 10.19455/j.mcgy.1993.01.007
        摘要：This paper deals with the drying characteristics of five hard wood species from Fujian Province by testing at 100℃, so as to further draw up suitable drying schedules. The results of the experiment showed that the differences among the five species are obvious. The drying defects of Lithocarpus glaber were serious and its drying rate was slow; the drying defects of Machilus sp. and Liquidambar formosana were moderate; the drying defects of Nyssa sinensis and Schima superba were slight. The drying rate of Liquidambar formosana was fast.  
        关键词：Drying defect;Drying characteristics   
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      • Lu Wenda Liu Yixing Cui Yongzhi
        Issue 1, Pages: 34-37(1993) DOI: 10.19455/j.mcgy.1993.01.008
        摘要：According to the National Standard of the Test Method of Wood Phsiycal and Mechanical Properties, the parameters of wood properties such as density, latewood percentage, width of annual ring, the length of trachied and length-width ratio of trachied have been measured from the different geographic provenance samples of fifteen years old plantation of larix olgensis, collected from Maoershan Forest Laboratory of Northeast Forestry University. Meanwhile, the comprehensive evaluation analyses have been done. Therefore, the information is very important for selection of provenance and directed education of fast growing plantation.  
        关键词：Larix olgensis;Wood properties;Geographic provenance   
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      • Issue 1, Pages: 37(1993) DOI: 10.19455/j.mcgy.1993.01.009
        摘要：<正> 据丹麦宣称,世界上最大的、用于刨花板生产的连续式加压生产线最近在丹麦的Pindstrup,Jutland的Novopan Traeindustri A-S工厂安装完毕并投入运行。Conti Power system(CPS)压  
          
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      • Wang Zhaowu Chen Gouren
        Issue 1, Pages: 38-40(1993) DOI: 10.19455/j.mcgy.1993.01.010
        摘要：In this paper, the mathematical model of wood-based panels dividing is established by no-size representation matrix and size vector quantity matrix. By studying the technological requirements of wood-based panels dividing, the optimum objective function and constrain function for the dividing are established. With the purpose of the most low-production cost we devide the objective function from minimal waste material area. Being simply and usable, the method is available for usc far and wide in furniture production.  
        关键词：wood-based panels;Daviding diagram;No-size representation matrix;Size Vcctor quantity matrix;optimum design   
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      • Issue 1, Pages: 41-44(1993) DOI: 10.19455/j.mcgy.1993.01.011
        摘要：<正> 本文着重论述在林产工业中采用新技术所必须考虑的、首要的和独特的影响因素,以预测未来采用新技术的程度。文章分为五个部分:(1) 从其它工业部门和其它国家引入技术的重要性;(2) 原料短缺的影响;(3) 新技术的经济效果;(4) 木质材料不  
          
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      • Issue 1, Pages: 45-46(1993) DOI: 10.19455/j.mcgy.1993.01.012
        摘要：<正> 黑龙江省为我国主要产麻省份,有20几个县种植亚麻,各县均设有亚麻原料加工厂,其加工剩余物——亚麻屑是生产麻屑板的极好原料,早已为国内外所公认。目前黑龙江省市售麻屑板的甲醛释放量,经省人造板质量监督检验站统计,一般均高于GB 4896～1905—85标准规定的小于50mg/100g,甚者高  
          
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      • Issue 1, Pages: 46(1993) DOI: 10.19455/j.mcgy.1993.01.013
        摘要：<正> 利用木纤维或纤维束与聚烯烃类塑料拌和制成一系列性能优越的强化复合制品是一项很有前途的复合材料生产技术,这项技术为利用木纤维与聚烯烃各自的优点生产更先进的材料提供了可观的前景。该种复合材料的特点是重量轻,并且其声学特性、抗冲击性,热成型性及尺寸稳定性得到改善。  
          
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      • Issue 1, Pages: 47-48(1993) DOI: 10.19455/j.mcgy.1993.01.014
        摘要：<正> 杨树分布广泛,种类繁多,成材时期短,是我国重要的速生树种之一。由于木材资源紧张,越来越多的杨木用于胶合板、刨花板生产。杨树木材心边材pH值的差异对其胶合质量具有明显的不利影响。因此,对这一问题的探讨有重要的实用意义。  
          
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      • Issue 1, Pages: 49-50(1993) DOI: 10.19455/j.mcgy.1993.01.015
        摘要：<正> 马尾松是我国南方主要的胶合板用材树种,用它生产的胶合板,板面纹理清晰自然,但由于它富含松脂,不易砂光,油漆性能较差,使得马尾松胶合板只能用于一般家具的隐蔽部分。为了开拓马尾松胶合板在高档家具以及高级装修等方面的应用领域,对马尾松单板脱脂改性处理技术的研究,具有  
          
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      • Issue 1, Pages: 51-53(1993)
        摘要：<正> 日本奈良县林业试验场小林好纪等利用微波加热的方法把中小径级的柳杉间伐材通过微波加热到100～120℃软化,然后压缩整形成方材。该项研究旨在开发一种不经过制材而直接将原木整形成方材的工艺。经过整形的木材,由于木材整体被压缩,  
          
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      • Issue 1, Pages: 54(1993) DOI: 10.19455/j.mcgy.1993.01.016
        摘要：<正> 庄前■先生字柳和,1917年生于上海市青浦县,1941年毕业于昆明西南联合大学土木工程系。毕业后从事土木营造工程。1947年起任上海和台湾扬子木材厂工程师、厂长及经理  
          
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