最新刊期
      期 0 ， 2020
      • Cai Liping Liu Zhiqun Han shijie
        Issue 3, Pages: 2-6(1992) DOI: 10.19455/j.mcgy.1992.03.001
        摘要：The effect on free radical concentration of chip surface treated with saturated steam at elevated pressures was investigated in this study. The ESR spectroscopy of wood chips of spruce ands birch after steaming under various pressures and time was analysed. The results, showed, a)after 1.275N/mm~2 pressure and 5 min. steam treatment, the free radical concentration of chip surfaces was higher than that of untreated, b) a reduction of 2% in resin content of the particleboards made from steamed chips resulted in reduction, in thickness swelling as compared to the controlled particleboards because of the change of the free radical concentration of the chip surface.  
        关键词：Steam treatment;Free radical concentration;resin content   
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        发布时间：2021-03-12
      • Zhang Yisheng Chen Shiying
        Issue 3, Pages: 6-11(1992) DOI: 10.19455/j.mcgy.1992.03.002
        摘要：In this paper, it is studied as follows: The influence of silicate cement of slag on the hydration property of gypsum; the relationshipbetween adding cement share and mechanical property of gypsum harden body; the influences of adding silicate cement of slag to gypsum in the rangeof 3—12% on bending strength and water-resistant property of the board; the influences of coatings on gypsum particleboard on ageing property. water-resistant property and bending strenth of the board.  
        关键词：Gypsum particleboard;Coating;Ageing property   
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        发布时间：2021-03-12
      • Chen Guangqi
        Issue 3, Pages: 12-15(1992) DOI: 10.19455/j.mcgy.1992.03.003
        摘要：The relationships between the physical and mechanical properties of wood cement particleboard made from poplar and the technological parameters: density, wood/cement ratio, water/cement ratio, additive and additive′s amount were studied. The results showed that among the density, wood/cement ratio, water/cement ratio, density had the largest influences on board′s properties; wood/cement ratio was the second, and the water/cement ratio had the least. The board′s properties such as MOR, MOE, IB could be described by density （D.）, wood/cement ratio （W/C）, water/cement ratio （W1/C）with the following equation, Y=a0+a1D+a2（W/C）+a3（W/C）2+a4（W1/C）+a5（W1/C）2. Among the three additives, the results of adding. CaCl2was the best.  
        关键词：Wood-cement particleboard;density;Wood/cement ratio;Water/cement ratio;additive   
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        发布时间：2021-03-12
      • Jiang Ti
        Issue 3, Pages: 16-20(1992) DOI: 10.19455/j.mcgy.1992.03.004
        摘要：plywood made from three species of poplar was studied. The results showed that for UF plywood the variation of the wood characteristics such as pH value and buffering capacity caused a series of processing problems including fuzzy surface, warping, and delamination. properly handling is needed for making the product to satisfy the requirement of chinese national plywood standard.  
        关键词：Fast growth poplar;plywood   
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        发布时间：2021-03-12
      • Issue 3, Pages: 20(1992) DOI: 10.19455/j.mcgy.1992.03.005
        摘要：<正> 为了满足对林产品日益增长的需要,未来的木材供应将大部分来自人工栽培的速生树种林木。这些林木采伐周期短,因而较正常材含有较多的幼龄材。美国林产品实验室对幼龄材单板的分等方法及对LVL结构性能的影响进行了研究。采用速生的  
          
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        发布时间：2021-03-12
      • Li Lanting Li Xiaoping Wong Xiangli
        Issue 3, Pages: 21-26(1992) DOI: 10.19455/j.mcgy.1992.03.006
        摘要：In this paper, the solid content, viscosity, free formaldehyde concentration, water resistance, curing time, UF glue DN-9 and DN-11 making and economic aspect of the E1 grade flax particleboard were studied systematically. The results showed that the formaldehyde release of the board made with DN-9 and DN-11 can be less than 10mg per 100g board(E1 grade)and the board properties can meet the Chinese particleboard standard GB 4896～4905-85.  
          
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        发布时间：2021-03-12
      • Issue 3, Pages: 26(1992) DOI: 10.19455/j.mcgy.1992.03.007
        摘要：<正> 利用沙巴地区人工营造的四种速生林木Acaciamangium(AM)、Eucalyptus deglupta(ED)、Gmelina arborea (GA)和Aibizia falctfcta(AF)的间伐材制造LVL,单板厚度2.5mam,9层。LVL的机械性能:1.四种树种LVL的MOR均超过日本农业部标准(JAS)结构用LVL一级品的基  
          
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        发布时间：2021-03-12
      • Guo Wenli
        Issue 3, Pages: 27-32(1992) DOI: 10.19455/j.mcgy.1992.03.008
        摘要：Aseries of MDF prepared form three, speeies of bamboo: Arundinaria hindsii, Bambusa teztilis, Bambusa pervariabilis and mixture of them, respectively, treated with 3 kinds, of low hazard fungicides againsts mold, domestic products TMO and DD, and imported product MECT. The result indicated that a fungicide effective in controlling mold for timber, would not be equal effective for MDF. Comparting with TMO for MDF, MECT was more expensive and would more decrease the strength of MDF than that of TMO. Preparetion of MDF and treatment with fungicide in proper way and optimum conditions made not only satisfactory antimold efficieney, but also high level of physical-mechanical, properties of MDF with low consumption of raw material and fungicide.  
        关键词：Bamboo MDF;Antimold treatment;Low hazard fungicides   
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        发布时间：2021-03-12
      • Luo Tushou Shi Zhenhua
        Issue 3, Pages: 33-36(1992) DOI: 10.19455/j.mcgy.1992.03.009
        摘要：The decay resistnaee of the rubber wood treatedo with preservative TWP by full-cell process was tested after 2～9 months airseasoning. The resuits showed that the board with 4～6cm in thickness was fully penetrated by TWP with a loading of BAE (Boric Acid Equivalent) over 0.2% (w/w) in the outer part with a thickness of 15mm. The durability of the treated wood was raised to durable grade, but the decay resistance was relative poor in field. The effect of different penetration depth on decay resistance of treated board was also studied.  
        关键词：Rubber wood;Water-soluble preservative;decay resistance;penetration depth   
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        发布时间：2021-03-12
      • Hu Muren Liu Shulan
        Issue 3, Pages: 37-43(1992) DOI: 10.19455/j.mcgy.1992.03.010
        摘要：An experimental result of abrasion resistance of 23 species of common hardwood in Guangdong was reported. The relationship between abrasion resistance and density, hardness, as well as the anisotropy of abrasion was alsodlscussed.  
        关键词：Abrasion resistance of wood;Abrasion in weight;Abrasion in thickness;Frictional direction   
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        发布时间：2021-03-12
      • Xu Youming
        Issue 3, Pages: 44-48(1992) DOI: 10.19455/j.mcgy.1992.03.011
        摘要：Five trees of Chinese pine （Pinus tabulaeformis） were collected from a stand of Zhongtiao Mountains in Shanxi Province. Based on the radial variation of the anatomy features, physical-mechanical properties of the wood, the stemwood may be divided into juvenile wood and mature wood, and the duration of the juvenile period is about 14 years old. The width of juvenile wood and the number of growth rings, decreased noticeably from the base to the top of tree. The volume of juvenile wood decreased in a similar pattern.There are significant differences（0.05Ievel）between juvenile wood and mature wood properties of the trees. Shorter traeheid lengths, smaller tracheid diameters, thinner tracheid walls, flatter fibril angle of the S2 layer, wider growth ring, lower percent of latewood and higher extractives content, higher specific gravity, lower physical-mechanieal properties are the characteristics of the juvenile wood in comparision with the mature wood.  
          
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      • Issue 3, Pages: 49-51(1992) DOI: 10.19455/j.mcgy.1992.03.012
        摘要：<正> 我国是少林国家,森林覆盖率、森林蓄积量都很低,人均木材消耗量、人均人造板占有量等与世界平均水平相比差距很大。利用农业剩余物生产人造板不仅能够代替木材,保护森林资源,而且对繁荣农村经济,加快农村脱贫致富的步伐也具有重要的意义。近十余年来,我国利用农业剩余物生产人造板  
          
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      • Issue 3, Pages: 51(1992) DOI: 10.19455/j.mcgy.1992.03.013
        摘要：<正> 竹材表皮美观、强度高,但对漆膜的粘附力极差,成为竹制品二次加工中的一个问题。竹材表皮粘附力差的原因可能是由于受抽提物成分及表层组织的疏永性影响。为改进它对涂膜的粘附能力及染色能力,日本林业与林产品研究所川村二郎专对竹材表皮进行改性处理。方法是把10×3.4cm带皮竹  
          
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      • Issue 3, Pages: 52-55(1992) DOI: 10.19455/j.mcgy.1992.03.014
        摘要：<正> 前言复合材料(composites)是指一种具有相互胶合共性的材料,木质复合材料不仅包括各种人造板、模压制品、复合锯材、大型成材、木结构及其它一些木质材料,也包括各种胶粘剂、树脂及其它胶粘材料。尽管现今世界人口增长,森林资源枯竭趋势加速,使复合材料的生产成本迅速上升,然而,科学技术也在发展。主要表现在愈来愈多的低  
          
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      • Issue 3, Pages: 56-43(1992) DOI: 10.19455/j.mcgy.1992.03.015
        摘要：<正> 目前,我国胶合板生产行业发展很快,设计生产能力大幅度增加。但是,来自林产工业管理部门的生产统计表明,全国胶合板生产厂家的实际生产达标率却很差,一九九○年国内部分胶合板生产厂家达标状况见表1。  
          
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      • Issue 3, Pages: 57-60(1992)
        摘要：<正> 木材阻水剂和LM木材尺寸稳定剂通过鉴定木材阻水剂(以前称防水剂)和LM木材尺寸稳定剂分别通过了中国林科院组织的专家鉴定。专家们一致认为课题组提供的鉴定材料齐全、试验数据可靠,两个产品在技术上均居国内领先水平。所研制的阻水剂以废塑料为原料,产品粘度  
          
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