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What are the methods for wood-plastic composites
Topic Started: May 23 2017, 03:18:21 AM (60 Views)
qizhen111
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Wood-plastic composite materials now become one of our most popular building materials nowadays, wood-plastic composite wood flour or wood fiber and plastic mixed injection molding. So what are the methods of wood-plastic composites.
Alternatively, the wood flour or wood fibers may be thoroughly mixed with the thermoplastic polymer or thermosetting polymeric material under heating and then injected into the mold to produce the product. At present, the most research at home and abroad is to use polyethylene as the mother, wood flour or wood fiber as filler and reinforced materials made of composite materials, but also to wood as a filler for the composite. When the combination of wood fiber and polyethylene, because the composition of wood cellulose, hemicellulose, lignin and other contain a lot of cyano, which has a strong hydrophilic, low in the thermoplastic content of water resistance And at the same time, due to the fact that the interface between the hydrophilic wood filler and the hydrophobic thermoplastic material can not be well adhered, the presence of the wood powder as a filler has a higher strength.
Wood-plastic composite plastic wood: This method is in the solid wood impregnated plastic monomer or phenolic resin. In the use of monomer as a leaching body, the monomer is usually non-polar, and wood is wood-plastic composite material from cellulose, hemicellulose, wood, extract and other components. Containing a large number of cyano groups, is polar, the monomer does not react with the wood. Only in the free radical initiator and heat radiation source caused by the monomer can produce free radicals, and polymerization in the wood, the formation of polymer polymer monomer filled in the wood tube and fiber cell cavity.
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