最新刊期
期 0 ， 2020
- 摘要：Development of wood-ceramic products made from poplar fiber impregnated with phenol-formaldehyde resin was investigated in this study.It was found that the three-dimensional structure of wood-ceramic samples was very similar to the one of a typical natural wood.The crystallization and the tendency of graphitization increased considerably with the raise of the sintering temperature.The results showed that the compressive strength,elastic modulus,and abrasion resistance of the wood ceramic samples improved dramatically when the resin contents and sintering temperature increased,especially for the sintering temperature between 500℃ and 800℃.The apparent density and porosity also increased when the resin content and sintering temperature increased,but the electrical resistance rapidly decreased.关键词：wood-ceramic;structure;compression strength;modulus of elasticity;conductivity
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发布时间：2021-02-08 - 摘要：An experiment was designed to investigate the color fastness of poplar veneer after being dyed with acid red GR,acid black ATT,and acid orange Ⅱ.It was found that the following factors involving the dying solution had a considerable effect on color fastness: temperature,pH value,concentration,and addition of a fixing agent.Results showed that the optimal processing parameters for dying poplar veneer were: temperature at 80 ℃,pH 6.5,fixing agent 0.1%,and dyeing agent 1.0%.关键词：Poplar;veneer dyeing;color fastness;processing parameter
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发布时间：2021-02-08 - 摘要：About 40% to 70% of total energy used for manufacturing wood products is consumed for drying wood.It is critical to increase the drying efficiency and improve drying energy consumption.A heat-pump drying system is a typical wood drying facility used in China.The objective of this study was to improve the drying system by optimizing the wind circulation.The relation between cycling-wind and energy consumption was examined in this paper.The results showed that the bypass-rate of cycling-wind had a significant effect on the specific power consumption（SPC） of a heat-pump drying system.关键词：drying system;heat-pump;wind circulation;bypass-rate
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发布时间：2021-02-08
Research & Development
- 摘要：Sapstain fungi,which are a main cause for wood discoloration,reduce the value of logs,lumber and even the mechanical performance.Water immersion and chemical treatment are commonly-used methods to prevent sapstain fungi.A biocontrol method of using microbes to inhabit sapstain fungi was described in this paper.The microbes were developed from isolated sapstain fungi grown on birch wood logs（Betula platyphylla）.A total of 42 biocontrol microbes were identified having antagonistic effects on sapstain fungi to certain degrees.Among them,two were found to be very effective to prevent all sapstain fungi.The results would provide help and guidance for future studies.关键词：Betula platyphylla;biocontrol of sapstain;inhibition zone;biocontrol microbe
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发布时间：2021-02-08 - 摘要：Shear strengths of small clear-wood specimens from Chinese Fir and Seguin chestnut were tested according to Chinese ISO 3347 and American ASTM 143 standards.The objective was to examine the effect of sample thickness and cutting angle on the shear strengths.Analysis of variance showed that there was no significant difference in the shear strength between the different sample thicknesses for both species.However,the result of t-test indicated that the cutting angle had considerable effect on the shear strength.The results provide references for revising the existing standard method of testing shear strength parallel to the grain for wood.关键词：thickness;cutting angle;shearing strength parallel to grain;standard
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- 3
发布时间：2021-02-08
Research Bulletin
- 摘要：The wooden-door manufacturing industry in China has been growing rapidly during the recent years.The annual production of wooden doors in China was about $5.8 billion with about 12% exported in 2007.The status,product classification,standards,marketing and quality control systems of China’s wooden-door industry were discussed in this paper.Industry consolidation,technological innovation and product consistency are among the major concerns.It was recommended to increase product-brand awareness,improve product quality,and to develop a standard system.关键词：wooden door;current status;development trend;standard
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发布时间：2021-02-08 - 摘要：The latest research and development of wood-based soundproof flooring in China are summarized in this paper.The basic characteristics,classifications,and soundproof mechanisms were covered.Lack of quantitative performance evaluation and quality assurance made it difficult to establish appropriate product standards for soundproof flooring.Development of non-cork material for the soundproofing the flooring provided an alternative solution to the current scarce cork raw material supply.Discussions and suggestions would provide some useful insights for Chinese soundproof flooring manufacturers in future product development and improvement.关键词：flooring;soundproof;cork;sound absorption;wood-based composite materials
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发布时间：2021-02-08 - 摘要：Wooden flooring used in gymnasiums is quite different from that used in residential buildings due to its unique requirements.Basic characteristics,typical structures,and functional factors described in both German and Chinese Standards for gymnasium flooring were considered in this article.Commonly-used structural models and their corresponding applications were discussed.The results were expected to provide some assistance and guidance for Chinese gymnasium flooring manufacturers in new product development and improvement.关键词：wooden flooring;gymnasium;basic characteristics;structural model
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发布时间：2021-02-08
Discussion & Suggestion
- 摘要：A plant trail of manufacturing medium density fiberboard（MDF） by using isocyanate resin in the production line was conducted in the Dongying Zhenghe Wood Industry Co.,Ltd.,Shandong,China.Compared with MDF made with commonly-used urea formaldehyde（OF） resin,the MDF panels made with isocyanate resin system demonstrated superior physical and mechanical properties.Furthermore,the average formaldehyde emission from the MDF panels made with the isocyanate resin,tested according to the National Standards GB/T 18580-2001 and Japan Standards JIS A 5905:2003,was 0.1 mg/L which is lower than the average maximum value（0.3 mg/L） required by both Chinese and Japanese standards.The low formaldehyde emission,and improved mechanical and physical properties,would add value to the MDF panels made with isocyanate resin and make them attractive for many applications.关键词：isocyanate（MDI）;adhesive;MDF;low formaldehyde emission;technology;property
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发布时间：2021-02-08 - 摘要：To optimize the processing parameters for plywood panels made with low-toxicity urea-formaldehyde resin,a metal-acid was selected as a modifier agent to mix with the UF resin.An orthogonal experiment was designed to investigate the effect of the metal-acid,moisture content of veneer,and curing agent on the bonding strength.The most dominant factor that had influences on the bonding strength for low-toxicity UF resin was identified.It was observed that when the ratio of urea to formaldehyde was 1.03∶1,the formaldehyde emission of the plywood panel was lower than 0.5 mg/L.关键词：low-toxicity urea-formaldehyde resin;bonding strength;curing agent;moisture content
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发布时间：2021-02-08 - 摘要：Consistence in the thickness of wood products after sanding plays an import role in determining the product appearance and value.A programmable logical controller（PLC） with frequency conversion was used in this study to improve the localized position control of a wood sanding machine.The detailed design and control systems were described.The feasibility of applying the position control,and localized precision control system,in industrial plants was analyzed and evaluated.The result showed the potential of commercialization of this position control system for wood sanding machines.关键词：wood sanding machine;PLC;frequency conversion;position control;thickness
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发布时间：2021-02-08 - 摘要：In this study,X-ray fluorescence（XRF） and atomic absorption spectrophotometer（AAS） were used to quantitatively determine the percentage of active ingredients in both CCA-treated and ACQ-treated wood samples.The results indicated that there was no significant difference between the two methods.However,the X-ray fluorescence had the advantage of being easier to use and fast in determining the chemical ingredients.关键词：X-ray fluorescence（XRF）;atomic absorption spectrophotometry（AAS）;preservative-treated wood
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发布时间：2021-02-08
Piactical Techniques
- 摘要：描述EPI胶黏剂YG 400的制备方法,并对其使用性能进行检测分析。结果表明,YG 400不但通过了欧洲DIN EN 204-D4级耐久性测试,而且通过了日本的JIS K 6806-2003测试和JAS BWS沸水浸渍剥离测试。还就YG 400、KR 134和PI-111三种EPI胶黏剂,对两种硬阔叶材的粘接耐久性进行了对比。关键词：EPI胶黏剂;性能;应用
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发布时间：2021-02-08
Practical Techniques
- Address：Box 29，Research Institute of Wood Industry, No. 1, Dongxiaofu, Haidian District, Beijing Postal code：100091
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