Plastics wood-plastic-composites

Ahmed, M, Thermoplastic Microspheres as Blowing Agents for Wood Filled Plastics. Wood-Plastic Composites 2004, Vieima, Austria (2004)... 

The improved physical and mechanical properties of the wood-plastic composites lead to a diversity of applications, e.g., automotive parts, furniture, construction (e.g., building panel, flooring veneers), toys, cutlery handles, industrial pattern, sports equipment, musical... 

TIR tooling indicator runout wpc wood-plastic composite... 

Hill, C.A.S. (2000). Wood-plastic composites strategies for compatibiUsing the phases. Journal of the Institute of Wood Science, 15(3), 140-146. 

Synthetic wood or wood-plastic composites (WPC) made from rigid PVC heavily filled with wood flour, extruded in wood-like profiles that can be sawn, nailed and screwed just like natural wood. .. 

Wood-plastic composites based on 30% to 70% natural fibre-filled polypropylene, polyethylene, polystyrene and PVC. 

Wood-plastic composites (WPC) are used as building material for decking, fencing, siding. .. for the low maintenance constraints. US demand is forecast at 2.5 billion through 2008. 

Brookfield, Ct., 2002, Session VII, p.153-62, 27cm, 012 CRITICAL PROCESSING TEMPERATURE IN MANUFACTURE OF FINE-CELLED PLASTIC/ WOOD-FIBRE COMPOSITE FOAMS Guo G Rizvi G M Park C B Lin W S Toronto,University... 

In addition, ABS that has been recovered can be recycled into high value composites without separation from impurities. This has been exemplified with wood-plastic composites that contain ABS as matrix polymer. Both virgin ABS and recycled ABS were used and the properties of the materials were compared (126). In order to increase the performance, coupling agents were used, all based on grafted maleic anhydride. 

S.-K. Yeh, S. Agarwal, and R.K. Gupta, Wood-plastic composites formulated with virgin and recycled abs, Compos. Sci. Technol., 69(13) 2225-2230, October 2009. 

Fifteen years ago, when wood-plastic composites were first introduced many people predicted that this process would solve the problem of wood dimensional stability and great claims were made for its future use. Now that the physical properties of wood-polymer composites are better understood, specific commercial products are being produced which take advantage of the desirable aesthetic appearance, the high compression strength, increased hardness and abrasion resistance and improved dimensional stability. Future use of wood-polymer composites will depend upon the imagination of the producer and the market place. 

It is significant that in the excellent and detailed book by Hebeish and Guthrie (4) only 16 out of 342 pages are devoted to this subject. Of these, 7 are on wood-plastic composites which are mainly in-situs polymerized monomers and only partially grafted. Nevertheless, they are closely related and with worldwide industrial applications. Details of these have been discussed not only in the above references but numerous other reviews and reports (37,38). These should be consulted for further details. 

In 75% of the cases, wood fibres are the preferred filler for thermoplastic matrices. Their high availability may account for this. The resulting composite material is internationally known as WPC, which stands for wood plastic composite. They have been produced industrially since 1980 and the market has gradually increased in the last 10 years, especially in the United States, reaching 700 000 metric tons with an 11% increase rate per annum. In Europe, the WPC market is considered to be emerging. At the best estimations, it reached only 100 000 metric tons in 2005 (Anonymous, 2006) and in lapan the market is even smaller. In America, more than 50% of the WPC is used for parquets and decking made with polyethylene. In Europe, it is the automobile sector that is preponderant with polypropylene-based composites. 

Anonymous. Wood-plastic composite growth taking off in Europe... while strong WPC growth continues in the USA.. Additives for Polymers (5) 9—11 (2006). 

Wood Plastic Composites (WPC) In WPC applications, it was claimed that the addition of organic phosphate, zinc borate/boric acid, sodium silicate, or ATH to milled rice straw with a resin binder can produce a fire-resistant board.65... 

Figure 14.22 Example of a line for the manufacturing wood-plastic composites...

Wood-plastic composites offer a number of benefits ... 

This research project represents initial studies into a new approach to blending thermoplastic materials like polystyrene with wood materials, leading to a new class of wood-plastic composites. Traditional wood-plastic composites have involved the impregnation and subsequent in situ polymerization of vinyl monomers. This procedure has been adopted for selected products for which improved physical properties justify increased production costs. While producing mixtures or blends of wood and plastics, these types of composites do not demonstrate significant chemical bonding between the wood and plastic components. 

FINITE ELEMENT ANALYSIS OF IMPACT DURABILITY ON EXTRUDED PLASTIC-WOOD FIBER COMPOSITE LINEALS... 

The interface between plastic and wood fibres strongly influences the mechanical properties of a plastic/wood fibre composite. A means for evaluating the effectiveness of surface treatment on the wood fibres in the PVC/wood fibre composites is presented that investigated the adhesion between PVC and laminated wood veneers. Wood veneers were first treated with gamma-aminopropyltriethoxysilane, dichlorodiethylsilane, phthalic anhydride, and maleated PP for surface modification. The chemical modification made on the wood surfaces was then characterised by different complementary surface analytical techniques X-ray photoelectron spectroscopy and surface tension measurements. 63 refs. 

When wood meals are kneaded with synthetic thermoplastic resins, the mixture shows hot-melting behavior as these plastics act as external plasticizers [20]. However, such wood plastic composites lack a fibrous construction and do not show the excellent properties of solid wood such as beautiful grain and color, tactility, or insulation. 

Wood-plastic composite specimens (WPG) were prepared by impregnating the oven-dry specimens with a solution of methyl methacrylate containing 1 % a,a -azobisisobutyronitrile as a catalyst, wrapping the specimens in aluminum foil, and curing the polymer at 80°C for 3 h. The structure of pattern (A-5) and (A-6) + (B-6) and (B-9) can be obtained under experimental conditions, but pattern (A-2) and (A-3) + (B-1) can be expected in industrial practice. 

Other important products include radiation cross-linked foamed polyethylene which is used for thermal insulation, floor mats, crash padding, floating jackets, and wood/plastic composites cured by gamma irradiation. These have been used successfully for flooring in places such as department stores, airports, hotels, and churches where their excellent abrasion resistance, the beauty of the natural grain, and low maintenance costs are important. This latter technique is also being used in the conservation of objects made of stone and wood of interest to our cultural heritage. 

Clemons C (2002) Wood plastic composites in the United States the interfacing of two indastnes. Forest Products Journal, 52(6) 10-8 Clifton NC (1978) Sprinkler storage of windblow proves effective and economic. Wood World, 79(12) 26-7... 

Wolcott MP and Englund K (1996) A technical review of wood-plastic composites. In Maloney T (ed) Proceedings of the 33rd Washington State University Particleboard Symposium, Pullman, Washington, 117-43... 

Wolcott MP (2004) Engineered wood-plastic composites. Conference on Wood Utilization Solutions to Hazardous Fuels. December 14-15. Spokane, WA Wood JR and Goring DAI (1973) The distribution of lignin in fibres produced by kraft and acid sulphite pulping of spruce wood. Pulp and Paper Magazine of Canada, 74(9), 117-21 (T309-13)... 

Wood plastics composites (WPC) - Anti rot, smface growth and anti-algal products for wood plastics composites (the growth of wood rot fungi on WPC is seen in Figure 6). 

CZVTKOVSKY, TIBOR. Radiation Processing of Wood Plastic Composites. Radiation Processing of Polymers. Hanser Publishers, New York (1992) 121-148. 

CZVIKOVSZKY T., Radiation processing of wood-plastic composites, in Radiation Processing of Polymers, (eds A. SINGH, J. SILVERMAN), Hanser - Oxford Univ.Press, Munich, NewYork, 1992. 

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