division 06 wood, plastics, and composites. plastic is manufactured from polymers, a synthetic material, and can be moulded or extruded, uniformly, into virtually any shape. composites are an engineered product, manufactured from a combination of two or more materials, and commonly include plastic, wood, glass and carbon fibers.
wood fibers as reinforcements in composites . 649 . 20.1 . a combination of three cellulose building blocks pettersen, 1984 . hydrogen bonding. the degree of crystallinity is approximately 60-70% for pulp wood fengel and wegener, 1983; pettersen, 1984 . the hydroxyl groups on cellulose are largely responsible for its reactive nature.
typical wood plastic composites or wood plastic compounds wpc are made out of 40 70% predried wood flour; 25 55% polyethylene high-density polyethylene hdpe , low-density polyethylene ldpe , pp or pvc; and 5% additives such as lubricants, pigments, stabilizers, coupling agents, biocides, processing aids, bonding agents, fr additives, and uv protective additives.
these plastic composite building products can contain anywhere from 30 to 70 percent wood, depending on the application, with about 50 percent being typical. regardless of the proportion, the fibers used in these plastic composites most often take the form of a particulate e.g. wood flour , rather than the longer individual fibers commonly used with inorganic-fiber composites.
ood plastic composite is a relatively new material that has many potential uses. the markets for wpc decking lumber have been expanding recently and new applications are being pursued. door and window components, deck handrails and fencing are other mar-kets for the wpc industry. the flexibility of manufacturing methods and
fiberglass-reinforced recycled composites can provide components for demanding structural applications, such as deck joists, marine break walls, and bulkheads/pilings. vinyl extrusion profiles, on the other hand, are being used primarily in railing and deck board systems.
carbon c-c composites are minor at this time because of the high cost of the material. expanded use of carbon- carbon c-c composites in industries other than defense and. aerospace will likely require the development of methods that reduce cost and yet maintain. properties that provide performance advantages.
sma-wpc plastic lumber shows significant promise as a replacement for wood composites and other types of plastic lumber, and the project will study the feasibility of using it in aquaculture and other marine structures.the phase i objectives are:determine the appropriateness of sma-wpc material in marine settings.test the effects of prolonged and intermittent submersion and outdoor exposure on the durability and strength of the material with testing in the laboratory and under marine field
while wood-plastic composites wpcs broke onto the scene in the 1990s as materials primarily extruded into boards for decking and fencing, optimization of these materials for injection molding since then has greatly diversified their potential applications as durable and sustainable materials.
fiberforce by bedford technology. due to the increased strength and its resistance to environmental elements, structural recycled hdpe plastic lumber is well suited for exterior applications where structural support or load bearing is required. it is manufactured in many different profiles and lengths and cuts, drills and secures just like traditional wood.
wood plastic composite wpc beams retrofitted with carbon and glass fiber-reinforced polymer cfrp and gfrp composites offer an attractive solution to enhance the behavior of wood in terms of
as a sustainable bioproduct, the demand for wood plastic composites wpcs is set to grow steadily, especially outside of the mature north american markets. with rapid innovation in materials recycling and extrusion technology, and demand growth in new geographies and end-use applications, the market for wpcs is exciting.
pvc, when used as decking material, is a composite material that has flexible design options. it can be manufactured to have the appearance of real wood and although the natural color is white, it comes in many colors and is most often seen in fencing and decking applications. it is a durable product because it is resistant to insects and rot.
wood-carbon fiber hybrid composites djamila kada,a,b,c sébastien migneault,c ghezalla tabak,b and ahmed koubaa c,* effects of the addition of short carbon fibers cfs on the mechanical, physical, and morphological properties of polypropylene pp and wood-polypropylene composites wpcs were investigated. hybrid composites
wood-plastic composites wpc , made of wood fiber wf and thermoplastics, have been well developed and commercialized in construction, packaging, automotive, and furniture industry over the past
matrix. wood and bone are natural composite materials: wood consists of cellulose fibres in a lignin matrix and bone consists of hydroxyapatite particles in a collagen matrix. better known man-made composite materials, used in the aerospace and other industries, are carbon- and glass-fibre-reinforced plastic cfrp and gfrp
products. carbon composite is a key material in today's launch vehicles and heat shields for the re-entry phase of spacecraft. it is widely used in solar panel substrates, antenna reflectors and yokes of spacecraft. it is also used in payload adapters, inter-stage structures and heat shields of launch vehicles.