WPC Study Abroad Overview _3428 -

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WPC Study Abroad Overview

Ratio by adding wood shavings, compressed into sheet after mixing and curve products. 2.2.4 built fine after the municipal solid waste, including waste wood and paper, after drying and thermoplastic resin mixture. By steam, softening wood waste and thermoplastic copolymers of lignin, and high-pressure steam by disc grinding wood debris will be ground into fine wood cellulose fiber, and softening of the thermoplastic resin is added upstream, even applied to the fiber around Finally,[link widoczny dla zalogowanych], by forming and hot or cold pressed, high-quality fiber. ■ 2002 No. 3 FOREST (total 123) * 61 * In addition to these methods, foreign scientists also developed a veneer of plastic composite materials, polymer materials used to dry veneer and plastic sheet material bonded to together under heat and pressure forming. 3 Coupling the vast majority of wood fiber is a form of powder or bonded together with the thermoplastic. Wood-plastic composite materials in the production of the biggest problems is the dispersion and compatibility, they are not easy to generate hair tangled mix easily understood, while polar fiber difficult to reconcile with the non-polar plastic glue, resulting in poor mechanical properties of composites. To improve the affinity between the two, in addition to improvements in agitation, but also test a number of dispersing agent and coupling agent. So far, about 4o kinds of coupling agents used in research and production can be divided into inorganic, organic, inorganic an organic and other categories. For example, polystyrene, wood grain molded composite materials, the use of polystyrene / poly A styrene copolymer (PS-PMAA) as a coupling agent, can significantly improve the tensile strength. In addition, polyethylene maleic acylating also have a good performance. 4 Application of wood-plastic composite materials automotive industry: today's cars than metal, plastic things, use a lot of wood materials,[link widoczny dla zalogowanych], hidden in their dashboards, seat backs, block wipers, door linings and other components inside. For example, wood fiber plastic composites production car base, this material is 50% wood flour,[link widoczny dla zalogowanych], 50% for the polyethylene, but also add other small reinforced filler. Using a special double helix extruder to mix with wood and plastic, and flat out the form, and then by compression molding for the base shape. Outdoor Products: plastic materials can be used for deck, dock platform, picnic tables, industrial flooring and other outdoor conditions, not only the maintenance costs low and can be recycled, but the need to add such as UV stabilizers to prolong life. Composite materials in the installation of the operating exactly the same with the wood, nails, bolts can be fixed, sawing, and easy to paint and stain. Doors and windows: wood-plastic composite materials used for doors and windows can be similar to the rectangular solid wood lumber, which should be processed appropriately shaped cross section. The latest patented technology is the use of modified plastics processing equipment to produce high wood content (70%) of the profiles, tolerances to ± 0. Olin. The net size of the profiles can be directly clad vinyl coated or other processing, such as standard parts as a direct installation. In addition, WPC can also be used to make pencils, light shell, racks, thresholds, door tracks and other products. 5 prospects a long time, the plastics industry and the timber industry has been in competition against each other, instead of many products to each other, are trying to expand their market share. However, little is known about the plastics industry to the timber industry, timber industry do not quite understand the plastics industry, which in material supply, equipment manufacturing, production process and almost no common ground. Now these two industries have encountered insurmountable obstacles. First of all, plastic is difficult to break down, causing serious harm to the environment, is well known. Followed by sharp drop in timber production, a situation emerged in significant demand, particularly in high-quality wood, precious wood is in short supply. Wood-plastic composite materials in a timely manner there happens to make up the gap between plastic and wood, the two fused together. The excellent performance of wood-plastic composite materials than wood or plastic alone. During the installation process, it can be nails, bolts can be used ordinary wood sawing and milling machine tools, you can also paint and stain,[link widoczny dla zalogowanych], very convenient to use. Currently, wood-plastic composite materials have become a hot research at home and abroad in the United States and a few developed countries to achieve the industrial production, but also by the user's favorite. The development of wood-plastic composite materials,[link widoczny dla zalogowanych], is the timber industry in the history of revolutionary development is the development of modern materials, the main direction of industry. However, wood fiber is a polar material, plastic non-polar materials, the compatibility issues yet to be further study.

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