摘要:In accordance with the decisions made by the State Council on acceleration of forestry development, the author presents his view on future development of the forestry industry in China. He stresses that to sustainably develop forestry industry for China, the first and base industry should be forest cultivation. He also suggests that the second industry, wood-based panel industry apply science and technology to add values on wood-based products. Foresters should seize the (opportunities) by deepening of reformation and implementation of the state decisions, emancipate the mind, keep pace with the times so as to carry forward our cause into the future.
关键词:Forestry industry;Ecologic system establishment;Sustainable development
摘要:Wood-based panels combine the economic and ecological benefits of the renewable wood resource with the tailored properties of a modern composite. After reviewing the present status and prospect of the wood based panel industry thoughout the world, the author suggests that in (response) to the economic globalization and China’s entry into the WTO, the Chinese wood based panels industry should follow the sustainable development principle, better understand the forest, improve the management of operations, recycle more and pollute less, make better use of the forest resources so as to enhance its international competitiveness to supply customers better products and services at lower cost.
关键词:Wood based panels industry;Sustainable development;WTO
摘要:Developing China’s wood industry can have many advantages for China. First of all, it will help improve the efficiency of wood utilization and save forest resources. It will also better( utilize) small diameter trees and forest residues for value-added products, use non-wood material( (agricultural fibers)) for composite products manufacturing to reduce the demand for wood fibers, (develop) new technology for using young plantation materials to replace logs from virgin forests, (promote) tree planting activities at the national level, improve the environment, reduce green-house (effects) and provide funds for sustainable forestry development. If some or all of these suggestions (are implemented), it would advance the development of the wood industry and promote sustainable development of forestry in China.
关键词:wood industry;Sustainable development of forestry
摘要:An intumescent polyurethane flame-retardant coating, blended respectively with (carbamide,) dicyandiamide or a compound of carbamide and dicyandiamide as a foaming agent, was applied to plywood. Heat release rates for combustion of the coated plywood samples were tested according to FAA standards. Compared with plywood control specimens, the coated samples showed better flame retardancy. Among the three foaming agents, the compound of carbamide and dicyandiamide revealed the most effective results in retarding plywood combustion.
摘要:This paper presented a production management information system for small or medium-sized furniture factories. The system was comprised of three input subsystems including a resource information system, a standard technology system and a production status system, and four output subsystems that control the production plan, the manufacturing process, the product quality and stock. The design method and contents for the whole system were described in detail in this paper.
关键词:Furniture factory;Management information system;system design
摘要:Following a series of experiments that had verified the feasibility of manufacturing (laminated) veneer lumber from Paulownia (Paulownia elongate) with urea-formaldehyde resin, the (authors) arranged an orthogonal experiment to determine the optimum technology parameters. (Results) showed that under the conditions of hot pressing at a temperature of 130 ℃, hot pressing time for (1.4) min/mm and glue spread of 380 g/m2, all the physical and mechanical properties of the Paulownia LVL samples could satisfy the requirements for indoors materials.
摘要:The internal bond strength (IB) of boards made from three species of laccase-activated wood fibers (Pinus kesiya var. langbianensis, Liquidambar formosana and Cunninghamia lanceolata) was tested and compared. The experimental data indicated that under the same activating conditions, these activated wood fibers revealed different auto-adhesion strength, which was deemed by the authors to possibly be related to lignin contents of wood fibers. The optimum pH values for the activating reaction medium for the three wood species were all within the acidic range, though there are some slight differences among them.
摘要:The composites investigated in this paper were made from wood fibers either with (polypropylene) only, or with polypropylene modified with maleic anhydride or alternatively coupled with a silane agent. The adhesion between wood fiber and polypropylene was evaluated (through) (testing) the tensile strength of the composite. An analysis was made on how the tensile strength was influenced by the ratio of wood fiber to polypropylene, as well as the effect of the addition of maleic anhydride and the silane coupling agent to polypropylene. It was found that when the polypropylene and wood fiber was mixed at 10∶3 and 3%~5% coupling agent was added to polypropylene, the wood-polypropylene composite showed the best tensile strength.
摘要:The effects of edge treatment, sampling location, and moisture content of plywood specimen on its formaldehyde emission were discussed. Results found that: 1) Formaldehyde emission content of a plywood board was closely related to the end-edge area of the specimen, while it changed little whether the surface of the specimen was covered or not. 2) Test specimens from a same board at different locations had slight difference in formaldehyde emission. The specimens in the middle or margins locations had more formaldehyde emission than those at the other locations. 3) The moisture content of a specimen had a remarkable effect on the formaldehyde emission (content.) In a relatively low degree, the formaldehyde emission content of a specimen increased with the (increast) of its moisture content.
摘要:For small-sized timber processing factories, the author proposes that an oxidizing pond should be the most economical and efficient way to treat the waste water derived from log steaming and boiling processes. The working principle of an oxidizing pond to purify the steamed and boiled waste water is discussed in this paper. It also gives an example that illustrates how to design and employ an oxidizing pond.
关键词:Log steaming;Waste water Treatment;Oxidizing pond
摘要:To decrease the formaldehyde emission in plywood, the authors selected two formaldehyde scavengers H300 and H800, to modify the urea-formaldehyde resin for plywood. Results showed that after modification, the curing time of the UF resin was prolonged. Under a certain (condition), the modified resin not only had the desired bond strength, but also made formaldehyde (emission) within E1 or E2 level in accordance with the Chinese National Standards GB/T 17657-1999.
摘要:Since the profile density of a board will directly affect its physical and mechanical (performances) as well as the total production cost for a wood-based panel factory, an accurate (measurement) of profile density is necessary to make products with higher quality and lower cost. (Technical) factors that may cause ill-proportioned density distribution in boards were analyzed. The authors (also) made some suggestions on how to adjust technical parameters based on the test results.
关键词:wood-based panel;Profile density;quality control
摘要:The door presented in this article is made with glue-laminated materials as the substrate and sliced veneers of some precious wood species for the faces. The structure and processing technology for this kind of door is described in detail.