最新刊期
期 0 ， 2020
- 摘要：Mechanical properties of metal plate connection（MPC） wood truss joint specimens with four different orientations（AA: parallel-grain/longitudinal-metal-plate,EA: perpendicular-grain/longitudinal-metal-plate,AE: parallel-grain /perpendicular-metal-plate and EE: perpendicular-grain /perpendicular-metal-plate） were evaluated.The results showed that for 38 mm×89 mm dimensional lumber: 1) AA connection specimens produced the best tension property;2) the ultimate tension load increased as the metal plate width or length increased,but increasing the width was more effective;3) the ultimate tension load and stiffness both decreased as the connection gap increased.关键词：metal plate connected joint;MPC joint orientation;metal plate size;storage time;gap between wood and metal plate;ultimate tension load;failure mode
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发布时间：2021-02-08 - 摘要：The authors evaluated the dimensional stability of lumbers with heat-treated,chemically modified and ammoniacal copper quaternary preservatives.The results showed that moisture absorption and volume expansion or shrinkage of the treated lumbers decreased.关键词：heat-treated wood;chemically modified wood;preservative-treated wood;dimensional stabilization
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发布时间：2021-02-08 - 摘要：<正>美国林产品研究所（Forest Products Laboratory,FPL）隶属于美国农业部林务局,坐落在美国中西部地区Wisconsin州的州府Madison市,与美丽的Wisconsin大学相邻。FPL是美国第一个专门从事木材科学与技术研究的国家级科研机
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发布时间：2021-02-08 - 摘要：<正> 近年来,以低能耗、低污染、低排放为核心的低碳经济发展热潮在全球范围内兴起,世界各国纷纷加大了森林保护力度,各个行业也开始倡导节能减排的发展模式,给以木材为原材料的地板行业提出了挑战,同时也提供了全新的发展商机。
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发布时间：2021-02-08
- 摘要：The unsteady state was used to measure tubular gingko particleboard coefficient of heat conductivity.The authors found that the heat conductivity coefficient of the particleboard less than 0.233 W/（m·K）,met the requirements for construction insulating material.They also found during this study that an air space in the sandwich wall had a considerable effect in the heat-conducting property,that was,the larger the air space the better the heat insulation.The results showed that sandwich wall,which had a 23 mm air space,provided 3.21 and 1.77 times better heat insulation properties than a reinforced concrete wall and a porous brick wall,respectively.关键词：tubular particleboard;sandwich wall;ginkgo;coefficient of heat conductivity;resistance of heat transfer
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发布时间：2021-02-08 - 摘要：The surface quality of planed and sanded plantation grown Eucalyptus exserta lumber was evaluated using a Scanning Electronic Microscope（SEM）.The observation showed: 1) for planed lumber,the most micro surface damages were due to the fibers and rays breaking and the fiber bundles being torn apart.On some surface areas,without obvious planing defects,surface tissues were crushed or collapsed;2) for sanded samples,the dominating surface damage was crushed surface tissues.关键词：Eucalyptus exserta;planning;Sanding;micro-destruction
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发布时间：2021-02-08 - 摘要：Internal defects of Chinese Fir and Euphrates Poplar were evaluated through imaging recognition by stress wave tomography.Results showed stress wave tomography was an effective method in diagnosing internal defects in wood.Defect information,such as dimension,location and shape,could be reconstructed through 2D image velocity matrix.The stress wave tomography provided a useful reference for assessing the stability of tree trunks,but it did not accurately distinguish between decay and hollow areas in the wood.关键词：stress wave tomography;wood defect;diagnoses;image recognition
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发布时间：2021-02-08 - 摘要：The microwave liquid phase deposition（MWLPD） method is widely used to make films in the glass,ceramic,and metal industries.The authors applied this method to coat TiO2 on solid Chinese Fir after which the antibacterial performance of the resulting composite was evaluated.Results showed that during a one year test this TiO2 coated Chinese Fir sample exhibited prominent,broad-spectrum and long-lasting antibacterial performance,but was also influenced by light exposure and temperature.关键词：microwave liquid phase deposition（MWLPD） method;Chinese Fir;titanium dioxide（TiO2）;antibacterial rate;antibacterial property
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发布时间：2021-02-08 - 摘要：Heat transfer of fire retardant wooden structures was evaluated with a standard fireproof test.The authors used a single wood-framed fire-retardant treated door as an example to develop a formula to predict heat transfer during the fireproof test.They found that the actual predicted result correlated well with the test results.Hopefully,the theoretical formula will provide some help to understanding heat transfer through a wooden fire retardant treated door.关键词：a single wood-fireproof door;heat insulation;theoretical formula
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发布时间：2021-02-08
Research & Development
- 摘要：Based on manufacturing procedures for rabbeting door leaves and frames,the key equipment requirement and its layout was explained and discussed in this paper.The functions,performance,and processing parameters of a multiple layer hot press,square sizing machine,rabbeting edge banding machine,door frame processing machines,and lacquering machines were also discussed.关键词：wood-based door;rebating door;key machine
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发布时间：2021-02-08 - 摘要：This article compared the Chinese national standard and European standard on solid wood flooring.The objective was to provide references for solid wood flooring manufacturers,exporters,and those revising the standards.关键词：standard;solid wood floor;China;European
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发布时间：2021-02-08 - 摘要：Life cycle assessment（LCA）,a tool to estimate the environmental impact of a given product or service,is the standard adapted by the ISO 14000 environmental management series and widely used in environmental management and product design.LCA research has been conducted for many years in many countries with LCA studies on wood products being increasingly visible for the last decade.This article summarized LCA research in the wood industry in Europe,America,Japan,and China.关键词：wood industry;life cycle assessment;life cycle inventory;functional unit
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发布时间：2021-02-08 - 摘要：Industrial engineering & energy audit are two commonly-used methods that can improve the industrialization of Chinese furniture manufacturing.The authors described the definition of industrial engineering and energy audit.They also illustrated the techniques,application,and current status of the two methods.They proposed that industrial engineering could play an import role in offering baseline data and a knowledge system for an energy audit,improve industrialization and competitiveness of Chinese furniture manufacturing.关键词：industrial engineering;energy audit;Furniture manufacturing
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发布时间：2021-02-08
Discussion & Suggestion
- 摘要：According to the new 2010 version of the CITES（Convention on International Trade in Endangered Species of Wild Fauna and Flora） there are 34 protected wood species worldwide,among them 8 wood species in China.The 34 endangered wood species are listed by CITES in different categories according to their existing condition: 6 species are listed in Appendix I,21 species in Appendix II,and 7 in Appendix III.关键词：convention on international trade in endangered species of wild fauna and flora（CITES）;appendix;wood species;protection and control
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发布时间：2021-02-08
Practical Techniques
- 摘要：Reinforced cement panels were made with bamboo pulp fiber,cement,and quartz through wet and semi-dry processes.The of effect bamboo fiber content had on panel performance and the difference between wood pulp fiber and bamboo pulp fiber was investigated.The results showed the panel modulus of rupture（MOR） was improved when the fiber content was increased.The optimized formula for the panels was: cement grade 42.5#,20% quartz sand,and 8% fiber.This bamboo pulp fiber/cement panel formula resulted in the MOR attaining 14.6 MPa,which met the Grade one specification in JC/T 626-2008.However,the panel made by the semi-dry process had a lower MOR than that made by the wet process.关键词：fiber reinforced cement based board;bamboo pulp fiber;wet process;semi-dry process;MOR
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发布时间：2021-02-08 - 摘要：The authors investigated changes in Betula costata’s color under different heat-treatment conditions using ultraviolet visible spectroscopy.The results showed the temperature and heat treatment duration were the two major factors for wood discoloration.The authors also observed that the Betula costata（ΔE*） color difference increased,which caused the treated lumber color to become redder and darker,with increasing temperature and duration.They also noted that the oxidized phenolic hydroxyl group could cause wood discoloration.关键词：heat-treated;Betula costata;Wood discoloration
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发布时间：2021-02-08 - 摘要：In this study,the effects of southern pine treated with different ammoniacal copper quaternary（ACQ） preservative formulations on metal corrosion were investigated.The results showed that wood treated with ACQ preservative had little corrosion effect on 304 stainless steel and red brass.However,concentrated copper oxide had a remarkably corrosive influence on Q235A steel and hot zinc galvanized steel when contacted with ACQ treated wood.关键词：ACQ;Wood preservative;southern pine;metal corrosion
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发布时间：2021-02-08
Piactical Techniques
- Address：Box 29，Research Institute of Wood Industry, No. 1, Dongxiaofu, Haidian District, Beijing Postal code：100091
- Tel：010-62889419 Email：mckx@caf.ac.cn
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