Wood plastic composite
Wood plastic composite is a kind of new environmental protection composite material, more and more people use it to replace real wood or plastic materials, wood plastic products for the development of the market, it was very good. Understand the wood plastic products to be able to better grasp the dynamic of the industry.
Wood plastic composites, often used for such things as outdoor decking, are one of the fastest growing components of the wood plastic composites industry. Some projections have suggested that these products, which were used for less than 1 percent of decking in the mid-1990s, may capture 20 percent of that market by 2010.
Wood plastic composites products made from wood and plastic are highly desirable for their low maintenance and ability to resist rot.But their use has been limited because of high cost and low strength, a result of inadequate adhesion between the wood fibers and plastic.
Fundamentally, this is because wood and plastic are like oil and water, and do not mix well. Wood is hydrophilic – it absorbs water – and plastic is hydrophobic, repelling it. A "compatibilizer," typically a polymer that bridges the interface between the wood and plastic in these products, improves stress transfer and increases their strength and stiffness.
The new wood-plastic composites use superior compatibilizers developed in Li's laboratory, and an innovative technology for mixing wood and thermoplastics such as nylons, in which the melting temperature of the plastic is higher than the wood degradation temperature.
With this approach, the new wood plastic composites can use very inexpensive plastics such as those found in old carpet fibers – about 4.4 billion pounds of which are now wasted every year, going into landfills where they are extremely slow to biodegrade and pose a significant waste disposal problem.
They could also open the door for improved utilization of low-grade woody biomass from needed thinning of Oregon forests, which is increasingly being done to improve forest health and prevent catastrophic wildfire.