最新刊期
      期 0 ， 2020
      • Zhou Youming
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.013
        摘要：In this paper,molded panels made of particles or fibers pre treated with steam was studied.Wood particles and fibers were treated with saturated steam at a pressure of 1 55 MPa for 4 min and 2 5 min respectively before molding.Testing results showed that the molded panels made of steam pre treated furnish had higher dimensional stability than that of control panels.Linear expansion of the panels made of treated particles,after cold water soaking treatment,was virtually dependent on resin consumption.Thickness swelling rate of the panels made of treated particles was reduced along with resin consumption increased in the range of 2 5%～7 5%。  
        关键词：Steam pretreatment;Molded wood based panels;dimensional stability   
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        发布时间：2021-03-12
      • Yu Jun
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.009
        摘要：This paper anticipated application prospects for making use of recycling technology for hermetically sealed high temperature condensation water in forest product industry fields and summarized successful experience of the technology applied in MDF Production of the National Engineering Center of Wood Industry.  
        关键词：High temperature condensation water;Water recycling;Energy saving   
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        发布时间：2021-03-12
      • Shi Zhenhua
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.003
        摘要：Newly felled logs of rubberwood ( Hevea brasiliensis )are easy to be infected by blue stain fungus( botryodiplodia theobrmae ).Experiment results showed that it was an effective way to prevent the logs from bule stain to spray 2% TMO immediately,an anti mold chemical,on cut end surface after felling,and then brush water repellent 3% TMO coating on the surface,if in rainy season.The anti blue stain effect could sustain for one month.  
        关键词：Rubberwood log;Bule stain;Anti mold chemical TMO   
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        发布时间：2021-03-12
      • Wang Jinlin Li Chunsheng Zhao Ge Du Rong Leng Yuelong
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.001
        摘要：Experimental drying tests were conducted for poplar rotary veneer with thickness of 1 01 mm and 2 02 mm by jet dryer under ordinary conditions.Afterwords relevant drying time and veneer shrinkage were determined.Poplar varieties tested were Populus deltoides,P.×euramericana,P.cathayana,P.simonii,P.gansuensis,P.bolleana and P.hopeinsis. The veneers were also dried by roller dryer under conditions similar with the jet dryer to determine veneer deformation after drying.Testing results showed that drying speed of the veneers was decelerative and the drying curves were similar to parabolic.Initial moisture content of the veneers was between 80% and 240%,not distributing uniformly within the veneer sheets,especially in the case of wet heart wood existing,resulting great difference in veneer drying time.On the other hand,no remarkable variation among these 7 poplars varieties tested was found in conditions of veneer moisture content ranging from 60% to 10%.It was also observed that twist defect heavily existed in all testing veneers from the 7 poplars varieties after drying.But veneer deformation of P. bolleana and P.cathayana was comparatively smaller than that of the rest 5 poplars varieties tested.  
        关键词：poplar wood;veneer drying   
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        发布时间：2021-03-12
      • Wu Shuhong Luo Zhaohui Sun Zhenyuan
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.010
        摘要：This paper introduced preparation work and physical properties of MDF made with both MF 97 melamine formaldehyde resin and MF UF resin mixture.The results showed that the properties of the MDF could meet the requirement of EMB MDF Industry Standard for MDF HLS.type.  
        关键词：Melamine formaldehyde resin(MF);Medium density fiberboard (MDF)   
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        发布时间：2021-03-12
      • Guo Ailong Zhang Haisheng Feng Liqun Gao Xiaoxia Zhang Guilan
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.005
        摘要：In order to use shrub materials to produce wood based panels reasonably,pH value,buffering capacity and curing time of 6 main shrub species in the north western China were measured.Testing results indicated that the 6 species showed little acidity with pH values between 6.03 to 4.54,that the alkali buffering capacities were between 0.314 to 0.222 mmol and acid buffering capacities were between 0.105 to 0.040 mmol.  
        关键词：Shrub species;pH value;buffering capacity;curing time   
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        发布时间：2021-03-12
      • Zhang Hongjian
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.006
        摘要：Taking into comprehensive account of renewability of wood resource,advantages of wood and wood products in both application or processing,responsibility for wood industry to satisfy market needs and interdependence between wood industry and sustainable development of society,economy and environment,the author believes it necessary to develop wood industry continuously.On the other hand,according to structural changes of raw materials and market as well as society and economy,impact of technology revolution which are affecting the structure of wood industry in China,this paper gave suggestions of ways to the sustainable development of wood industry in China practically so that to adjust structure of wood products,technology,production scale,to develop relavant industries,to explore market potential including application technology for wood products,and to enhance educated human resource and R & D capabilities at all levels.  
        关键词：wood industry;Sustainable development   
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        发布时间：2021-03-12
      • Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.008
        摘要：９数控加工中心加工中心是一类功能较全面的数控加工机床。它把木材加工工艺中的锯、铣、钻削和开槽、铣榫等加工功能集中在一台机床上，使其具有多种加工手段。与数控铣钻床不同的是，加工中心设置有刀具库，刀具库中存放着不同数量的各种刀具和检测工具。在加工过程中由...  
          
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        发布时间：2021-03-12
      • Issue 5, (1998)
        摘要：简讯国家林业局独家支持的’９９木工及家具展明年三月在沪举行中国每年对林业及木工机械的需求约为５０亿元人民币，家具市场需求亦不断上升，尤其在工商业重镇———上海。自９０年代起，上海的建筑业蓬勃发展，带动上海家具需求每年上升２０％。为配合华东市场的迅速发...  
          
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        发布时间：2021-03-12
      • Duan Xinfang
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.004
        摘要：Chitosan is a natural and renewable polymer without toxic and pollution to human beings and environment and can be used to improve effect of surface dyeing for wood.Lightfastness of wood pre treated with chitosan and then dyed was studied in this paper.Six wood species were pre treated or untreated with chitosan and then all dyed with one acid dye.One wood species was pre treated or untreated with chitosan and then all dyed with 4 kinds of acid dyes.The results showed that lightfastness of pre treated wood was better than that of untreated one.  
        关键词：chitosan;wood dyeing;lightfastness   
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        发布时间：2021-03-12
      • Ouyang Lin
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.007
        摘要：Abrasion mechanism of defibrator discs and requirements for material properties of manufacturing the discs were discussed in this paper.The technoeconomic index of the discs made of chromium iron and stainless steel was compared.A conclusion was made that the stainless discs was optimal.  
        关键词：Disc;Abrasion mechanism;Passivation of disk;Mechanism of defibre   
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        发布时间：2021-03-12
      • Ma Shichun
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.011
        摘要：In order to improve dimensional stability of wood, wood samples were pretreated with saturated steam before drying. Results showed that the dimensional stability of 6 wood species after pretreatment were significantly improved.  
        关键词：Satruated steam treatment;Vapor drying;dimensional stability   
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        发布时间：2021-03-12
      • Zhang Haibin
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.012
        摘要：A new kind of phenol formaldehyde resin(PF)for paper impregnation was developed through adjusting synthetic technology and adopting new additives.Testing result showed that the resin had low toxicity and good solubility in water. Concrete formwork panels overlaid with the new resin impregnaed paper proved high resistance to abrasion,acid and alkali corrosion,drying check,and steaming etc.  
        关键词：Phenol formaldehyde resin(PF);Impregnated paper;Concrete formwork   
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        发布时间：2021-03-12
      • Zhang Yisheng Chen Shiying Long Ling
        Issue 5, (1998) DOI: 10.19455/j.mcgy.1998.05.002
        摘要：In this study gypsum fiber board(GFB)was reinforced with wood fiber prepared by defibrator.The paper described the relationship between mechanical properties and wood/gypsum( W/G )ratio,water/gypsum( H/G )ratio and density was also established a mathematics models concerned.The results showed that MOR/MOE/IB increased significantly along with density increase; W/G ratio and H/G ratio were cross impacted,which had strong influence on board properties;both spring back and TS increased along with W/G increase;fiber pattern had significant effect on both IB and TS ;and defibering condition had little effect on MOR/MOE .  
        关键词：Gypsum fiber board(GFB);wood fiber;Semi dry process;mathematics model   
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        发布时间：2021-03-12
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