最新刊期
期 0 ， 2020
- 摘要：The flexural properties of Chinese larch（Larix gmelini） dimension lumber（40 mm×65 mm×4 000 mm,40 mm×90 mm×4 000 mm and 40 mm×140 mm×4 000 mm,Ⅰc and Ⅲc） were tested according to the American Society for Testing and Materials（ASTM） D4761-96 standard.The characteristic values for Modulus of elasticity（MOE） and modulus of rupture（MOR） were evaluated using both nonparametric and parametric statistical analyses.The preliminary results provide a reference for improving the existing Chinese structural dimension lumber testing and characteristic value evaluation system.The goal of this study was to improve the existing Chinese testing and evaluation system of dimension lumber.关键词：dimension lumber;larch lumber;modulus of elasticity;modulus of rupture;characteristic value
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发布时间：2021-02-08 - 摘要：Based on evaluation and analysis of Copper Triazole（CuAz） preservative,which was commonly used in wood product preservation industry in China,the authors found that the CuAz preservative exhibited some poor performance in mold inhibition,termite resistance.Decay resistance performance of CuAz preservative was good,leachability of CuAz preservative was better than import preservative,and metal corrosion of CuAz preservative was low.关键词：copper triazole;Wood preservative;properties
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发布时间：2021-02-08 - 摘要：在金融风暴的冲击下,中国地板生产企业面临严峻的考验。据中国林产工业协会地板专业委员会统计,2008年我国地板生产企业的销售量约3.44亿m2,同比下降了4.8%。"超级店员"犹如地板行业冬天里的一把火,对于救市究竟有怎样的作用?笔者走访了中国林产工业协会地板专业委员会秘书长吕斌先生。
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发布时间：2021-02-08
- 摘要：The authors selected six different flooring materials to study bending performance test methods to establish a wood-plastic flooring reference standard.They established a test formula for each kind of flooring,and set the span at 300 and 400 mm,to evaluate the effect.The results showed that when the span was 400 mm the bending deflection increased while the maximum carrying capacity was reduced.The span had little influence on bending strength,but affected the elastic modulus.The authors suggested that capacity and flexibility should be considered to determine an appropriate span.关键词：water resistant wood-plastic flooring;special-shaped;bending strength;modulus of elasticity
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发布时间：2021-02-08 - 摘要：The authors developed a coding method for identifying and differentiating solid wood furniture manufacturing processes based on their characteristics.The detailed coding structure and proposed identification coding method were explained.It is expected that this unique coding system could provide guidance and specific examples for Chinese wood furniture industry to improve production management.关键词：furniture;technology;coding
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发布时间：2021-02-08 - 摘要：The authors observed temperature distribution in wood during pyrolysis in a sealed chamber while exposed to fire.They found that: 1) pyrogeneration and carbonization primarily occurred on the wood surface;2) the carbonized layer had asymmetrical thickness due to variations in the wood temperature;3) the carbonized layer shrank along the grain and along defects in the wood resulting in many gaps.This helped to increase and diffuse the temperature and gas pressure in the wood causing a significant influence on internal wood pyrolysis and temperature distribution.关键词：fire;sealed vessel;wood pyrolysis
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发布时间：2021-02-08 - 摘要：Light wood truss structural performance,under various loading conditions,was investigated to determine the design values.Selected metal plates were also evaluated for maximum tensile and shear resistance.The results showed wood member grain direction and metal plate configuration are the most important factors that influence overall structural performance.关键词：light wood truss;metal plate;ultimate strength
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发布时间：2021-02-08
Research & Development
- 摘要：Based on the characteristic of plantation wood,through the different pretreatments to change wood permeability and the different dyers,a relative good dyeing process was identified after the orthogonal test.The experimental results showed that using basic dyes,maintaining 2 hours under 0.09 MPa degree in a vacuum after pre-steaming,and soaking 12 hours under atmospheric pressure,finally specimens were dyed 7 hours under the pressure of 1.2 MPa.关键词：wood dyeing;permeable;water absorption ratio;dye uptake
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发布时间：2021-02-08
Research Bulletin
- 摘要：The authors first reviewed China’s furniture industry focusing on the development and application of manufacturing styles.They then summarized the main characteristics of some advanced manufacturing styles used by other countries and their applications in the industry.After comparing China’s manufacturing styles with those from other countries,suggestions for Chinese furniture manufacturers for improving their styles were presented.Upgrading the existing manufacturing styles could enhance China’s furniture industry’s competitiveness in international markets.关键词：China’s furniture industry;manufacturing;style
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发布时间：2021-02-08 - 摘要：This article discussed formaldehyde emission limits of wood products in major countries and it made several recommendations for control of formaldehyde emission limits to improve quality of wood products in China.关键词：wood products;formaldehyde emission;standard;formaldehyde emission limit
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发布时间：2021-02-08
Discussion & Suggestion
- 摘要：The authors investigated the effects of universal joint and specimen storage time after bonding with the universal joints on surface bond strength of medium density fiberboard（MDF）.The results showed that the specimen exhibited higher surface bond strength when two universal joints were used compared to none or one universal joint was used.As the storage time was extended from 0 to 6 hours,the surface bond strength first increased,reached the maximum value at 1 hour,and then decreased to become stable.关键词：MDF;surface bond strength;universal joint;storage time
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发布时间：2021-02-08 - 摘要：The authors evaluated and improved the cork expansion process by removing impurities and adding value to it.After cork specimens were boiled and dried under various conditions,their weight,volume,and surface characteristics were evaluated.An optimal expansion process was determined based on the results.This included boiling the samples in a 10% methanol solution under pressure for 1 hour and baking them at 240 ℃ for 2 hours.关键词：cork;baking;expansion process
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发布时间：2021-02-08 - 摘要：The author applied a modularized design to examine the possibility of developing structural modules for an American style post-bed.A detailed design of each module,and their connections,was presented.It is expected that modular production could take advantage of a concurrent manufacturing process,reduce component specifications,and improve productivity.关键词：American style post-bed;modularized design;module series
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发布时间：2021-02-08 - 摘要：The authors studied bamboo vinegar preservative performance and mold prevention on selected wood molds.The goal was to improve performance and develop the most efficient preservative with lowest toxicity for wood and bamboo.The results showed that bamboo vinegar was 99% effective at sterilizing bacterium fungi even when diluted to 10% strength.The antifungal action was greatly improved by adding active components.Treated bamboo products had improved antifungal performance and could meet Grade 4 requirements using only raw bamboo vinegar,Grade3 with PW1 coating,Grade 2 with PW2 dipping or PW3 dipping,Grade 1 with PW1 dipping and PW2 coating,and Grade 0 with PW3 coating.关键词：bamboo vinegar;bamboo vinegar preparation;antifungal activity;bamboo
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发布时间：2021-02-08 - 摘要：The authors evaluated the temperature effect on preservative leaching from preservative-treated fast-grown Masson’s Pine（Pinus massoniana） to optimize the drying process.After being dried at various temperatures（70,80,and 90 ℃）,the specimens were separated into three groups to conduct leaching tests with durations of 0,7 and 14 days,respectively.The percentages of copper leached from the specimens were evaluated.The results indicated that the wood dried at high temperature leached more copper than that dried at lower temperature.It was recommended that the drying temperature should not exceed 70 ℃ for preservative-treated fast-grown Pinus massonian to obtain the highest preservative retention level.关键词：Masson’s Pine;preservative-treated;Drying technology
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发布时间：2021-02-08 - 摘要：The authors developed a high performance liquid chromatography（HPLC）method to analyze Benzyl-dimethyl-dodecyl-ammonium chloride（BAC） from an extracted solution of preservative-treated wood.The parameters of this method were as follows: a venusil SCX separating column;a 5︰1 methanol to water volume ratio,ammonium chloride and acetic acid was used as a mobile phase;and a 262 nm wavelength UV detector.The linear correlation of this method was 0.999 7 at a 10 to 1000 mg/L BAC concentration.The average recovery of spiked samples was 100.9%.The relative standard deviation was 0.235% and the detection limit was 1.0 mg/L.关键词：BAC;treated wood;extracted solution;HPLC
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发布时间：2021-02-08
Piactical Techniques
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