The thermoplastic material combines the properties of renewable resources and natural wood with the processing capabilities of common thermoplastics. The material can be used in architecture or to make products, using various proceses, such as injection moulding, thermomoulding and extrusion.
Wood Plastic Composite Decking Manufacturing Process. Courtesy of WMEL, Washington State University, www.wmel.wsu.edu ... Extrusion, Injection or Compression molding ... Maintained by Wood Materials and Engineering Laboratory (www.wmel.wsu.edu) at . Washington State University. Title: Slide 1 Author: Vikram Yadama
Using a self-developed technique, JELU processes wood fibres and plastics such as polypropylene to manufacture a high-quality WPC for extrusion and injection moulding. Many years of experience, high-quality ingredients and comprehensive in-house testing assure outstanding quality and a composite that is easy to process.
Unlike wood, our polymer/wood composite material absorbs very little moisture during extended exposure to the environment. Greenland Composites has an in-house design and fabrication department to make extrusion dies, processing, and other components required to extrude application-specific, wood/plastic products.
REX or Reactive Extrusion REX is a process that employs an extruder, normally Co-TSE as chemical reactor instead of a typical steel vessel, joining mixing, devolatilization and chemical reaction in one step.
of using wood chips asmaterial in one-step extrusion of WPCs. If wood processing can be done in the same step as the compounding of WPC, then energy-consuming
Pvc wood-plastic foam door plate extrusion line Pvc wood-plastic foam board plate made by this pvc wood-plastic foam plate extrusion line collects the advantages of wood and plastic. It not only has appearance of natural wood, but also overcomes shortcoming of wood, it has good processing performance which is similar to wood, it can be sawed and nailed.
Specific objectives include studying quality attributes of wood and natural fibers (i.e., particle type and size) on composite properties; studying compatibility of natural fibers with common plastics for developing effective coupling agents and mechanisms among the various phases; developing and optimizing the extrusion technology for producing WNFPCs; and developing processes for enhancing the performance of WNFPCs against fire, insect, and decay through chemical additives and nanoparticles.
While much of processing remains similar to that of traditional plastics, specific wood-to-plastic ratios and other additives meant to achieve some desired look, feel, or performance characteristic may need to be accounted for in processing.
wood fibers. For processing on the ex-truder,the fibers are generally present in the form of the flour, chips, individual ... Direct Extrusion Direct processing of natural fiber-rein-forced compounds occurs in stages on a co-rotating twin-screw extruder (Fig. 5).
Wood processing machine manufacturers can therefore benefit from B&R's expertise . a strong trend toward new materials such as WPCs (wood-plastic composites). . Extrusion and injection molding machines must raise and lower the.
The extrusion process evaluated in this study was derived from the BiVis process, but uses only one extruder and screw elements are especially developed for this purpose. This extrusion pulping process, for which a patent is pending, can be used for producing several paper qualities from wood and non-wood fibres [3-5].
The European market uses more natural fibres, while North America, with more readily available wood sources, uses more wood fibre. The WPC market continues to grow rapidly, with 14% CAGR estimated for North America and 19% CAGR for Europe from 2002 to 2010.
extrusion process (melt pressure, temperature, etc.) ... thermal degradation of wood and natural fibers ≥ 200°C melt temperature thermal degradation causes an embarrassing and typical odor thermal stress influences the color of the compound and in further consequence the
Wood is not the only natural fiber used in plastics composites, but it is the most common. Wood used for WPCs is ground, screened, and dried prior to extrusion. For decking and fence profiles, where a rough surface texture is acceptable or even desirable, screening the wood fiber to 40 to 60 mesh results in good flow characteristics and ease of mixing into the plastic matrix.