最新刊期
      期 0 ， 2020
      • Issue 4, Pages: 3-6(2000) DOI: 10.19455/j.mcgy.2000.04.001
        摘要：This paper deals with manufacturing technology of the low density particleboard with thickness of 35～42 mm from small diameter Chinese Fir thinnings . The particleboard with density of 0.4 g/cm 3 is not only good in strength, but also good in water resistance and sound / heat insulation. It is found that this particleboard is a good interior building material for making door plank, wall paneling and ceilings, etc.  
        关键词：Chinese Fir thinnings;Low density particleboard;Manufacturing technology   
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        发布时间：2021-03-12
      • DU Guan ben,LU Sheng gao,CHEN Qiong
        Issue 4, Pages: 7-9(2000) DOI: 10.19455/j.mcgy.2000.04.002
        摘要：Vacuum hot treatment is for the purpose of reducing formaldehyde emission of medium density fiberboard (MDF) and improving performance of board. The result showed that formaldehyde emission mainly took place within 2~4 hour vacuum hot treatment with vacuum 66 661 Pa (500 mmHg) and temperature 60 ℃. The formaldehyde emission of MDF reduced greatly and the board performance improved about 10%.  
        关键词：medium density fiberboard;Vacuum hot treatment;formaldehyde emission   
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        发布时间：2021-03-12
      • Issue 4, Pages: 10-12(2000) DOI: 10.19455/j.mcgy.2000.04.003
        摘要：The chromatism and dye up take were studied by orthogonal method according to the changes of the parameters of dyeing. The 0.5 mm sliced Paulownia veneer was dyed in aqueous solution of the acid bright red. The result showed that NaCl concentration was the most important factor to the chromatism of dyed samples before and after dyeing , and the best concentration was 0.5%. The dyeing temperature was the second factor and 50 ℃ was appropriate to both chromatism and dye up take. The concentration of surface active agent was the third factor and best concentration was 0.1%. As the 4th factor, the most suitable treating time was 4 hours .Acetic acid was the 5th factor to dyeing effects of Paulownia veneer with the best concentration of 2%. There was not obvious change in chromatism caused by concentration change of dye solution , and the best concentration was 0.5% in dye up take .  
        关键词：Paulownia veneer;dyeing;Technology   
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        发布时间：2021-03-12
      • QIN Te fu,YAN Hao peng
        Issue 4, Pages: 13-15(2000) DOI: 10.19455/j.mcgy.2000.04.004
        摘要：In the report, the difference of esterification ability of the main composites of two species of wood Chinese Fir (Cunninghamia lanceolata) and Poplar “Sanbei" No. 1 (Populus nigra×P.simonii) and the effect of wood extractives on wood weight increase during esterification were investigated. The results showed: the esterification weight percent gain ( WPG ) of cellulose was lower, during the process of acetylation hemicellulose was hydrolysis, the main part of holocellulose WPG was contributed by hemicellulose and the esterification ability of Chinese Fir lignin was higher than that of “Sanbei" No.1. The extractives could effect acetylation reaction of wood, it is advantageous to the acetylation of "Sanbei" No.1 and disadvantageous to acetylation of Chinese Fir.  
        关键词：Chinese Fir;“Sanbei" No.1;acetylation;Esterification weight percent gain   
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        发布时间：2021-03-12
      • WANG Yan jun,GUAN Ning
        Issue 4, Pages: 16-18(2000) DOI: 10.19455/j.mcgy.2000.04.005
        摘要：For filling the room of X ray wood densitometry in China, a wood densitometer, MWMY, was jointly developed by Research Institute of Wood Industry of CAF and Beijing Kexin Institute of Mechanical & Electrical Techniques. This instrument is a combination of mechanics, electronics, optics and computer techniques. In this paper, a brief introduction on the basic functions for MWMY and its flow of the main parts of the software system were presented.  
        关键词：Wood densitometry;Computer software   
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        发布时间：2021-03-12
      • FAN Hui fang
        Issue 4, Pages: 19-21(2000) DOI: 10.19455/j.mcgy.2000.04.006
        摘要：There is a big market opportunity for plywood for container flooring. This paper has analyzed the opportunities, problems and risks in domestic container trade. The development of the manufacturing technology was also recommended.  
        关键词：Container flooring;plywood;Manufacturing technology   
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        发布时间：2021-03-12
      • HAN Wei
        Issue 4, Pages: 22-24(2000) DOI: 10.19455/j.mcgy.2000.04.007
        摘要：This paper covers major types of wood adhesive commonly used for wood floor industry. The urea formaldehyde resin (UF), Emulsion Polymer Isocynate (EPI) and Polyvinyl Acetate (PVAc) are introduced in conjunction with the production, installation and quality assessment of different types of wood floor products.  
        关键词：Adhesive;Wood floor   
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        发布时间：2021-03-12
      • HE Xing
        Issue 4, Pages: 25-27(2000) DOI: 10.19455/j.mcgy.2000.04.008
        摘要：The paper briefly introduced the history and characteristics of wood drying controller and discussed the future development points.  
        关键词：wood drying;Controller   
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        发布时间：2021-03-12
      • WANG Fang 1,HUANG Luo hua 2,LI Hua 2
        Issue 4, Pages: 28-29(2000) DOI: 10.19455/j.mcgy.2000.04.009
        摘要：In this paper, the manufacturing process of medium density fiberboard (MDF) made with wood chips of 50% Rubberwood ( Hevea brasiliensis ) and 50% Longbeak Eucalyptus ( Eucalyptus camaldulensis ) with UF resin LLM was studied. The results showed that the main physical and mechanical properties and formaldehyde emission of the board could meet the requirement of MDF Chinese Standard of GB 11718.2 89.  
        关键词：UF resin-LLM;MDF   
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        发布时间：2021-03-12
      • HUA Jun,LU Ren shu
        Issue 4, Pages: 30-32(2000) DOI: 10.19455/j.mcgy.2000.04.010
        摘要：The paper introduces a pilot scale trail on drying of Chinese White Poplar ( Populus tomentosa) veneer by using flexible screen belt. The pilot scale trail result showed that the quality of dried veneer was improved, and the drying method was feasible.  
        关键词：Flexible screen belt;veneer drying;Pilot scale trail   
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        发布时间：2021-03-12
      • WANG Ping,JIANG Xiao mei,QIN Te fu,ZHANG Hou pei
        Issue 4, Pages: 33-35(2000) DOI: 10.19455/j.mcgy.2000.04.011
        摘要：Having analyzed the types of wood decay and insect of the wood, the wood structure has been treated by varied preservatives and treatment methods. The main species of wood components of the building are Hard Pine ( Pinus spp. Subgen. Diploxylon ), Soft Pine ( Pinus spp. Subgen. Haploxylon ), Larch ( Larix spp.) and Spruce ( Picea spp.). The test result showed that the mechanical strength of treated wood was not affected significantly by the methods of treatment. The forced air drying method for treated timber is simple, easy and efficient.  
        关键词：Wood preserving;Preservative   
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        发布时间：2021-03-12
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