摘要:Coinciding with the development of the forest industry during the coming “The Eleventh Five-year Plan” in China,the discussed the main concern for the industry to become more competitive from the current big producer status.First,it is necessary to build raw material sources,to realize large-scale production,to modernize management,to globalize business management and to build well-known brand name products.Secondly,forest solicitude industry could be strengthened by improving forest land productivity and the forest product processing industry by up-grading innovation and add-value on raw materials.Thirdly,China should persuade comparative advantage to develop regional characteristic industry and the assembly area in order to promote forest industry assembling and industrial zone.To fulfil the above-mentioned thoughts,several actions should be taken such as strengthening policy guidelines and normalization,making up industry permit regulations,strengthening planning guidelines,building forecasting and early-warning system,strengthening government macro management,implementing regional policy and making industry associations more active.
关键词:forest industry;development trend;policy and regulations
摘要:The development of straw-based composites industry in China would help solve the shortage of timber supply and contribute to the protection of forest resources and the environment. Thes first presented the current status of agri-residue straw resource utilization both in China and abroad;then listed the primary products manufactured with straw-based panels,analysed the characteristics of the manufacturing technology of these panels as well the panel application in different fields.Finally,some suggestions were made for further development for the straw-based composites industry in China.
摘要:The utilization of plant-based phenolic compounds enlarges the sources of raw materials, reduces cost,and promotes implementation of sustainable development.This paper reviews the research on adhesives derived from lignin,tannin,wood liquefaction,and oil pyrolysis.In order to obtain wider application of these adhesives,it also indicates that it should be necessary to further explore the mechanism of these adhesives,strengthen the modification studies,further lessen the cost,and continue to expand the sources of new raw materials.
关键词:plant-based phenolic compounds;PF adhesive;sustainable development
摘要:Dyed wood is similar to timber when being used for furniture and interior decorative fittings.Its surface is easily deteriorated by environmental factors,especially by[ultra-violet]light which will directly damage the decorative effect of dyed wood.This article makes a comprehensive review of research on the mechanism and prevention of light-induced discoloration of dyed wood.
摘要:As a new material,wood-fiber/plastic composites (WPC) are attracting more and more attention.In this article,thes summarized the research on compounding technology,interface modification,and characterization of wood fiber and other natural plant fibers with various plastics. Both foreign and domestic research was addressed.Thes concluded by discussing the integrating performance characteristics and extensive potential applications of WPC in the future.
摘要:A series of drying experiments was conducted on plantation grown Poplar(Populus deltoids cv.I-69-55)and Masson’s pine(Pinus massoniana)lumber by three different heating methods,namely,convection,infrared and microwave.This paper determined the drying rate and energy consumption for those three drying methods,and also analyzed how the wood drying characteristics were influenced by the heating methods,wood species and lumber thickness.Results found that:1) The heating method affected the drying rate significantly.One-way hyperbola model indicated that the relationship between heating method and drying rate was close for the convection and infrared method,but not clear for the microwave method;2) The average energy consumption ratio of the 3 heating ways of convection,infrared and microwave,was 1∶1.01∶0.64;3) As for the drying quality,convection drying had a long cycle which easily developed defects such as surface or internal cracks in the wood;microwave drying had a more rapid rate,but was likely to result in internal cracks or carbonization,so it was suitable for slabs;infrared drying was inferior in quality,and was only suitable for thin panels.
摘要:Thes of this article made a two-step experiment on waste particleboards in order to investigate an effective method and the number of possible times waste particleboards could be recycled.In the first step,four methods of reducing waste particleboards back into particles were used including conventional water boiling,water boiling with high pressure,steaming and direct shattering,and were compared.Tests on particle screening values and recycled particleboard properties showed that water boiling was the best treatment method.Based on the results,the second step was to reuse the recycled particleboard from the water boiling treatment again to make particles also by water boiling.Property tests indicated that the once re-utilized particleboard had qualified performance according to the national standard GB/T 4897.5-2003 for load-bearing boards used in humid conditions.Although the twice re-utilized particleboard had lower properties,it still met the requirements for interior applications according to GB/T 4897.3-2003.
摘要:This paper analyzed and tested the gluability of glued laminated lumber by four plantation grown Eucalyptus species focusing on gluing pressure and adhesive consumption. The results showed that two high density species of Eucalyptus (E.citriodora and E.exserta) have poor bonding performance with lower wood failure.The other two Eucalyptus species (E.grandis and E.urophylla×E.grandis) with lower density showed better performance.
摘要:To meet the demand of the automotive industry for an odorless wood/polypropylene composite,thes made a research on WPC.They used odorimetry,Fourier transform infrared and thermo-gravimetric analysis methods to investigate the reasons for WPC composites emitting an irritant odor,and found that the odor was caused by the weak thermal stability of the WPC.To improve compatibility between the wood powder and the polypropylene,they chose several additives,including sodium hydroxide,coupling agents,adsorbent,etc,to pre-treat the wood powder.The test results showed that pre-treating wood powder with sodium hydroxide was the most effective way to relieve the irritant odor from WPC.According to the optimum pre-treatment methods presented in this paper,the odor of the composite made from treated wood powders was able to meet the demand of Grade 3.0 according to the Shanghai Volkswagen Standard PV 3900.
摘要:Edge banding processes and tooling setup were introduced for the manufacture of panel furniture parts.The technical parameters in different steps of edge banding were discussed.
关键词:process of edge banding;tooling setup;panel furniture parts
摘要:This paper summarized research progress in reconstituted bamboo timber,and discussed the feasibility of its industrialization from four aspects:resource,technology,marketing and investment benefits.It was proposed that developing reconstituted timber could change the current status of basically depending on large-size Moso bamboo and low utilization rate for bamboo resources.Increasing the use of small diameter bamboo and bamboo residues would help save precious bamboo resources and improve economic benefits.
关键词:reconstituted bamboo timber;feasibility;investment value
摘要:An experiment was conducted to study the drying characteristics of Shorea laevis by the 100 ℃ test.Based on the results,a drying schedule for S.laevis flooring was attained.A drying trial,according to the drying schedule,showed that it took 16 days to dry 22 mm-thick Shorea laevis lumber from moisture content of 41.34% to 12.64%,and the dried lumber quality met the machining demands for solid flooring.
摘要:This article examines three factors in modular furniture design.First,the social background and its basic concepts are discussed.Then,taking panel furniture as an example,it illustrated how to arrange the diversity of household electrical appliances by modular design. Finally,typical examples of panel furniture modular design were presented for a reference guide.
摘要:This paper analyzed the characteristics of process,equipment,investment,quality and cost of traditional multi-layer parquet production using single-component moisture-curing liquid polyurethane (PUR) adhesives.It was concluded that using moisture-curing PUR adhesive could simplify the production process and improve product quality and profit.
摘要:Nowadays,most Chinese plywood manufacturers use multilayer frame hot presses for production.However,that kind of hot press,being controlled by relays and contactors and owing to its complex control circuits and many contacts,is easy to break down.To solve this problem,thes made an improvement for this hot press by using a PLC in its control system,removing some relays,contactors and a lot of wires,so that the control circuits were simplified,and the reliability of the hot press was improved.