A new generation of Jianghua WPC manufacturing process characteristics

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With the increasing scarcity of timber resources, while strengthening forest resource protection, with wood flour or other natural plant fiber filled plastics recycling materials or new mater ials, special equipment made fiber plastics and related products, due to its dual characteristics of both plastic and wood, in recent years in a variety of

Materials emerge, and gradually become the hot spot of the public attention and development. Among them, the production of plastic sheet of polyethylene, polypropylene resin and wood flour blends can be used in a variety of occasions to replace wood, the development is particularly rapid.

    After several years of development and application of ordinary wood-plastic materials and wood, less rigid and plastic materials, surface finish, there are obvious gaps, there are still some problems in the process. With the expansion of application fields, how to further enhance

The performance of the WPC has become the focus of the development of researchers. Found by experimental comparative study of the relevant domestic experts, to determine the processing line and materials used i n the design and manufacture of woodplastic materials, according to the characteristics of the molecular structure in order to achieve a new generation of wood-plastic materials, wpc wood quality

Effect. Which, during processing of natural plant fiber orientation is the key technology of the new vinyl wood-plastic materials.

    In the structural design of wood-plastic material, the first consideration is the selection of raw materials. Varieties of plastic commonly used in polyvinyl chloride (PVC), polyethylene (PE), polypropylene ABS and high impact polystyrene. Natural fibers for wood flour, rice hulls, peanut shells, straw and other agricultural and forestry processing waste

, The waste material. Rice husk cellulose content is higher than wood flour, water and lignin content than wood flour, chemical c omposition of different changes in the species of origin, unlike wood flour, so the quality is relatively stable. But more important is to take into account the aspect ratio of wood flour fiber, degree of orientation, content with the

Relationship to the opposite sex, and other factors. Long fiber is wood fiber, wood flour became the staple fiber, wood flour fineness finer, the better the uniformity, but the fiber length and aspect ratio declined significantly, it is generally considered the more detailed the better view of the wood flour is not comprehensive, the key molecular orientation arrangement, wood

The cellulose molecules of the powder should be arranged in a certain direction, can effectively improve the rigid strength.

    Plant fiber orientation is the key technology for WPC production, morphological structure, which is the new generation of wood-plastic materials and wood products (such as fiberboard) the biggest d ifference. The wood fibers are long fibers aligned along the trunk direction, so that the timber has an excellent rigidity, strength

And bending capabilities. Can play a role similar to the long fiber to enhance the effect of wood flour or rice husk powder fineness, powdered fiber aspect ratio and the content should be carried out a series of regulation match. The study found that the use of wood flour, chaff with a bimodal distribution of fiber length to provide strength to the fiber length,

Short way to improve the machining performance and surface finish to effectively solve the degree of orientation is not high long fiber content is high, poor surface finish, and the brittleness of processing difficulties and short fiber, high strength is not a contradiction.

    Oriented in the good or bad, and raw materials, formulation of a great relationship, but the decisive or by the equipment, tooling and processing conditions to ens ure that, so not any extruder can meet day-fiber vinyl profiles of production requirements. For natural fiber composite wood material to the extruder, the set

meter parameters and plastic profile extruder are very different materials in the wood fiber content is high, poor liquidity, the top of the method is ideal, that is under enormous pressure, driven by material in the screw, to overcome the head pressure drop, type embryos from the die top, type embryos after leaving the die, and do not need to set

Mold and cooling water, but the head runner longer. As the extrusion pressure to withstand the torque of the screw, gear box, motor, this top of the method is suitable for the production of high density products. Smaller density foam vinyl material, the use of traction, not more than 50% wood fiber content,

Flexible, technology an d products through recipe and adjust the processing conditions to produce the wood grain and can be supplemented by a cooling technology that enables the processing temperature of the resin to adapt to the high temperature characteristics of the wood fiber in the production processes required to make the resin (plastic) full plastics, flow, and the fiber flow orientation,

And do not operate the fiber. Only in this context in order to obtain the desired wood products.