最新刊期
      期 0 ， 2020
      • Zhang Yi
        Issue 4, Pages: 3-7(1990) DOI: 10.19455/j.mcgy.1990.04.001
        摘要：In this article, the compatibility of Populus davidiana, Betula plotyphylla, Quercus mongolica and Picea abies as well as the mixture of the former three species with the manufacture of gypsum-bonded particleboard was studied At same technical parameters, the gypsum-bonded partieleboard made of the lower density species with higher MOR, i. e. spruce board is the strongest, then poplar and birch, the board made of oak is the weakest. Spruce and poplar are suitable species for the manufacture of gypsum-bonded particle-board But the qualified birch and oak boards were not obtained even through the change of wood-gypsum ratio and wood particle Volume, water extraction of wood particle. Mixture of various wood species will not only offset the hydration time, but also make the quality of gypsum-bonded partieleboard unstable, which should be avoided in practice.  
        关键词：Gypsum-bonded particleboard;wood species;density;Wood gypsum ratio   
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        发布时间：2021-03-12
      • Zong Kuen
        Issue 4, Pages: 8-11(1990) DOI: 10.19455/j.mcgy.1990.04.002
        摘要：Two kinds of flexibilizers used in SN-decorative laminate were studied. The results showed as follow: 1. Polyvinyl acetate, used as a flexibilizer, can increase the flexibility of SN-decorative laminate and decrease the water resistance of it; 2. Polyvinyl alcohol was proved to be a better flexibilizer, it not only will increase the flexibility of the laminate, but also cannot decrease the water resistance, In addition, the optimum technological parameters were fixed.  
        关键词：Decorative laminate;Flexibilizer;Urea-formaldhyde resin   
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      • He Dinghua,Lin wenjie
        Issue 4, Pages: 12-18(1990) DOI: 10.19455/j.mcgy.1990.04.003
        摘要：The drying test at 100℃ and kiln drying were conducted to find out the drying characteristics and suitable drying schedules for 24 species of hardwood from South China. The results of the experiment showed that the tendency of most species to degrading defects during kiln drying is consistent with the drying defects showed by 100℃ test While in the care of very few of species, the drying defects appeared during kiln drying are different from those occurred in 1O0℃ test and the present drying conditions should be modified by revision tests  
        关键词：Drying defect;Kiln drying schedules;Initial moisture content   
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        发布时间：2021-03-12
      • Zheng Yage
        Issue 4, Pages: 19-22(1990) DOI: 10.19455/j.mcgy.1990.04.004
        摘要：This paper presents an analysis and comparison between long and short process of bandsaw milling in sawmills, which may provide a reference for designing new sawmills and modifying old onesThrough practice and theoretic analysis, the short process is prefered for its advantages, such as, the saw milling and convey equipment do not interfere with each other, the load on each saw is uniform, neither many workers nor large place is required, the headrig with carriage can reach high efficiency, the main technical and economic indexes are better than those of the long process.  
        关键词：Technological process;Positioning datum;Lumber recovery;Qualification rate;productivity   
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        发布时间：2021-03-12
      • Jin Zhongwei You Jixue He Wenlong
        Issue 4, Pages: 22-28(1990) DOI: 10.19455/j.mcgy.1990.04.005
        摘要：Studies were undertaken to screen and modify the preservative that have better performance in the world now Two new wood preservatives—ACB （provisional name） and CCB-M were obtained. Determinations of main indexes, such as decay resistance, ternite resistance, anti-coloring fungi and moulds, leaching, fire resistance, metal corrosion, LD50 were carried out. The results showed that two formulations had good performance. ACB is more suitable to treat wood whose natural colors need to be kept for example, rubberwood and constructural timber, etc, and CCB-M is used to treat the timber whose color is not restricted  
        关键词：Wood preservative;Modification;Toxicity;impregnation;Retention   
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        发布时间：2021-03-12
      • Liu Xiuying Zhou Ming Lin Lulu
        Issue 4, Pages: 29-32(1990) DOI: 10.19455/j.mcgy.1990.04.006
        摘要：Some selecting experiments were conducted to test the efficiency of 9 kinds of antimould reagents on the bamboo (Phyllostachys pubescens). The results showed that industrial antimould reagent No.75, DP antimould reagent, the complex of boron phenol and the complex of fluor phenol at low concentration are prefered, thiopanatemetyl, cafbendazim and thiran can give good preformance but a little more concentration is needed; the ledum oil and bromo-geraminum are not recommanded for their poor efficiency.  
        关键词：phyllostachys pubescens;Antimould power;Antimould efficiency;Mould   
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        发布时间：2021-03-12
      • Liang Jingsen Guan Ning
        Issue 4, Pages: 33-37(1990) DOI: 10.19455/j.mcgy.1990.04.007
        摘要：BY using direct scanning method, the accuracy of wood microdensitometry with 3 kinds of x-ray source ((55)~Fe, (238)~Pu and x-ray tube) was studied and the Variation of mass attenuation coefficients of 4 species of wood was determined and analized The measurement with (55)~Fe and x-ray tube was found more accurate than that with (238)~Pu because the x-ray energy of the formers is closer to the optimal one than the latter A certain degree of variation of wood mass attenuation coefficienat among species and within a species was showed in the tests, which should be considered as high accuracy of the measurement is expected  
        关键词：X-ray microdensitometry;wood density;Wood density variation;Microdensitometrical characteristics;Mass attenuation coefficient   
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        发布时间：2021-03-12
      • Cao Zhongrong
        Issue 4, Pages: 38-41(1990) DOI: 10.19455/j.mcgy.1990.04.008
        摘要：Through analyzing the results obtained bytesting bond strength, it is shown that the test methods of bond strength specified by National Standards for Plywood are advaneed, reasonable and feasible.  
        关键词：plywood;Bond strength   
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        发布时间：2021-03-12
      • Issue 4, Pages: 41-44(1990) DOI: 10.19455/j.mcgy.1990.04.009
        摘要：<正> 亚麻屑是亚麻浸渍后在压碾剥麻过程中亚麻秆纵向分裂而成的矩形屑,是亚麻加工的剩余物,其拉伸强度和抗弯强度接近阔叶树材,物理和化学特性与木材相似,品种单一、质地均匀、容易收集,是制造碎料板的优质非木材原料。亚麻屑碎料板各  
          
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        发布时间：2021-03-12
      • Issue 4, Pages: 44-49(1990) DOI: 10.19455/j.mcgy.1990.04.010
        摘要：<正> 一、概述随着经济的发展,传统的、用于木材生产的天然林日趋减少,已很难满足人类对林产品日益增长的需要,于是人工林应运而生。经精心管理的人工林及原始森林的次生林生长迅速,能在较短时间内提供较多的商品材,收益高、见效快,可作为一种新的木材资源弥补天然林资源的不足。有迹象表明,未来的林产工业将主要依靠遗传选育的速生人  
          
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        发布时间：2021-03-12
      • Issue 4, Pages: 50-52(1990) DOI: 10.19455/j.mcgy.1990.04.011
        摘要：<正> 今年2月,笔者随同中国林业部赴苏森林工业考察团考察了远东和西伯利亚地区以及莫斯科等三个市的一些森工局、木材加工企业。现就对苏联木材加工和家具工业的考察所得及本人之观感简介如下。一、苏联木材与家具工业发展简况苏联是世界上森林资源极其丰富的国家之一,  
          
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      • Issue 4, Pages: 53-54(1990) DOI: 10.19455/j.mcgy.1990.04.012
        摘要：本文报导了辐射松(Pinus rodiata)材在7月至9月间二氯甲烷浸提物的含量和组成。在该期间浸提物含量增加了47%,这是由于8月份木材中的树脂酸含量有所增加,其它类浸提物的百分比无明显变化。  
          
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        发布时间：2021-03-12
      • Issue 4, Pages: 55-58(1990)
        摘要：<正> 国内首家生产的集装箱胶合板底板通过鉴定青岛华林胶合板有限公司生产的集装箱胶合板底板和水泥模板子七月二十五至二十八日通过产品鉴定。专家们认定:这种集装箱底板在防腐、检疫、强度和外观质量等方面均达到国际标推。目前,这家公司每年可提供5万套集装箱底板,能满  
          
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