最新刊期
期 0 ， 2020
- 摘要：The effects of the addition of polyvinyl acetate emulsion on the performance of hot pressed cement particleboard（CPB） was studied with Poplar particles of certain size as a raw material,Number 42.5 common silicate cement as an inorganic glue and Na2SiO3 as a fast curing agent.The results were: 1) The addition of polyvinyl acetate emulsion could greatly improve physical and mechanical properties of CPB with modulus of rupture（MOR）≥8 MPa,internal bond strength（IB）≥0.4 MPa,modulus of elasticity（MOE）≥3×103 MPa and thickness expansion from water absorption≤2%.2) Only when the spring-back rates,after unloading,were less than 10%,CPB,with ideal physical and mechanical properties by hot a pressing method,could be obtained.关键词：cement particleboard（CPB）;fast curing;polyvinyl acetate emulsion（PVAc）
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发布时间：2021-02-08 - 摘要：The authors conducted a series of experiments to determine the manufacturing parameters for making MDF from cotton stalk.Results showed that cotton stalk could be used as one of the raw materials for MDF production.Optimum parameters obtained through the experiments were as follows: density 0.7g/cm3,glue consumption 12%,water-resistant agent 1.5%,hot-pressing temperature 180℃ and hot-pressing time 15 s/mm.Under these conditions,the boards had superior mechanical properties compared with the national standard.However,the 24h TS could not meet the standard requirement,owing to the character of the cotton stalk itself.关键词：cotton-stalk;Medium density fiberboard（MDF）;fiber;production process
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发布时间：2021-02-08 - 摘要：This paper studied the formula of a wood/plastic composite as affected by a milling process.The ratio of coupling agent added, wood to plastic,and MAPP to peroxide diisopropylene benzene,and milling time were discussed as main factors.The results showed that:1) mechanical properties of a WPC were improved by adding MAPP and they dropped to the lowest value at a wood/plastic ratio of 5∶5;2) when the ratio of MAPP to peroxide diisopropylene benzene was 1∶（0.0751.0）,the comprehensive properties of a WPC was acceptable;and 3) the effect of milling time on WPC properties was not significant.关键词：process parameter;wood/plastic composite（WPC）;ratio;milling;property
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发布时间：2021-02-08 - 摘要：Based on an analysis of characters of a glue dosing system for particleboard production,the authors proposed a self-adaptive control method which was established on an open loop proportional control and using PID control as a tool for parameter tuning.They also designed a special intelligent instrument to equip this control method.Linking this instrument with a host computer in which industrial control configuration software could be used to develop a friendly HMI,a high-quality and low-cost control system was obtained.关键词：particleboard;glue dosing system;Micro-controller;micro-computer control
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发布时间：2021-02-08 - 摘要：The measurement of chip moisture content（MC）,based on capacitance,was researched.The results from the experiments showed that with given conditions there would be some functional relations between the MC of the chips and the value of their capacitance that were exponential when 5%≤MC<25% and were linear when 25%≤MC<150%.At these conditions the chip MC could be measured through its capacitance.Models also included chip length,width,and thickness as these had some effect on coefficients that were included as correction factors.关键词：Moisture content（MC）;capacitance;chip
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- 48
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发布时间：2021-02-08 - 摘要：The property changes of wood-plastic composites were studied under outdoor weathering in this paper.The surface change of the material was also measured and analyzed using a scanning electron microscope.The results will give some direction to the production and utilization of wood-plastic composites.关键词：wood-plastic composites（WPC）;properties;electron microscope;outdoor weathering
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- 254
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发布时间：2021-02-08 - 摘要：The equilibrium absorption content was measured in different conditions by static method.The relations between the pyrolysis temperature,the size of bamboo charcoal particle,absorption temperature and the surface area were studied.The results showed that two kind of bamboo charcoal whose pyrolysis temperature were 700 ℃ and 1000 ℃ had the best absorbing ability.The size of bamboo charcoal particle had little influence on absorption.The ability of absorption could be decreased as the environmental temperature increased.The phenomena of moisture absorption hysteresis were found during moisture desorption and absorption.关键词：bamboo charcoal;equilibrium moisture absorption content;hysteresis
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- 244
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发布时间：2021-02-08 - 摘要：By using SPSS software and the gray analyzing procedure,the authors analyzed the timber consumption in the three fields of architectural construction,decoration and the furniture industry for the city of Beijing.They also made a relative analysis of the relationship between Beijing timber consumption and its GDP values from 1995 to 2004,which was expected to provide data for forecasting market development and formulating policies.关键词：Beijing;timber demand quantity;forecast;relative analysis
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发布时间：2021-02-08 - 摘要：The development,and current status,of remote control techniques applied in wood drying are reviewed.The principle of a remote control system for wood drying is also presented.It is concluded that such techniques will be an important subject in the wood-drying control field.关键词：wood drying;remote control
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发布时间：2021-02-08 - 摘要：When Green Trade Barriers were implemented in more and more countries,the evaluation of properties for wood-plastic composite（WPC） as packing material became more important in the field of foreign trade.Method factors,parameters and property values showed gains according to SPSS from appropriate test data,which could promote the application of WPC material. The results indicated that WPC were becoming accepted in the package industry as a replacement for untreated solid wood packing material.关键词：wood package material;wood-plastic composites（WPC）;property;evaluate
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发布时间：2021-02-08 - 摘要：In this paper,problems in the furniture manufacturing are analyzed and a management information system（MIS） software program developed by the authors is presented.The program is based on C/S（Client/Server） structure using "Delphi" foreground and "SQL 2000" background.Implementation of this program could help furniture companies improve management efficiency.关键词：Furniture enterprises;informatization;Delphi;MIS
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发布时间：2021-02-08 - 摘要：An intelligent MC measuring system for lumber was designed by the authors and presented in this article.The hardware circuit and software flow chart of this system are described in detail.A dynamic compensation method is applied to eliminate zero drift and temperature drift errors.A test showed that the mean errors of the measured results from this new system was less than 4% above fiber saturation point,and less than 2% below fiber saturation point,and even lower tian 1% around the final MC（14%～9%）.These results demonstrated the precision and reliability of the system to be effectively improved.关键词：lumber;Moisture content（MC）;automatic measurement;analog input channels
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发布时间：2021-02-08 - 摘要：This paper describes the significance of wooden packaging thermal treating and explains the composition of the XINAN-RYJC thermal treating system in detail.It includes its working principle and characteristic and provides the forming mode for the network which can be used in various situations.关键词：wooden packaging;thermal treating;remote inspection system
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发布时间：2021-02-08 - 摘要：A modified urea-formaldehyde resin was prepared with oxidized starch following treatment with H2O2.The mechanisms of how to oxidize starch and compound it with UF resin were described in this paper.Factors that were analyzed,that had an effect on the modified resin,included the degree to which the starch is oxidized and the amount of available urea and formaldehyde.Compared with traditional urea formaldehyde resin,this modified resin showed superior bonding strength,better resistance to water,resistance to aging,and lower emission of free formaldehyde.关键词：oxidized starch;urea-formaldehyde（UF）;modification;inter-connection
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发布时间：2021-02-08 - 摘要：Through the use of the internet,active server page（ASP） and database,the authors built a virtual wood herbarium where all the wood samples of CRIWI were visualized through computerization,thereby making samples gain permanent accessibility.They also developed a touch-style search system to improve work efficiency,and an internet information service system to increase the number of users and make the most efficient use of the limited resources.关键词：wood sample;ASP（Active Server Page）;Database;virtual wood herbarium
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发布时间：2021-02-08 - 摘要：The drying properties of Brachystegia cynometroidea and Lophira alata from African were studied by 100 ℃ test method.Results found that L.alata was more difficult to dry,and its internal checks were more serious than B.cynometroidea.The lumber grade due to initial checking for L.alata and B.cynometroidea was respectively five and three,while in terms of section distortion,the grades for both species were three.Based on these results,drying schedules for both species were established.关键词：100 ℃ testing methods;Drying properties;drying schedule
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发布时间：2021-02-08
- 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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