Hemicellulose in the process is also flammableWood flour or wood fibers, mainly composed of cellulose, hemicellulose and lignin. Lignin can provide strength and durability for the wood, WPC strength depends largely on lignin
By: qizhen Although the lignin to play a major role in the mechanical properties of wood-plastic (wpc), but itself also has some adverse effects. Lignin is a photosensitive material, UV light degradation, which is the main reason for the fading of wood and wood-plastic materials (WPC), under UV irradiation, the lignin from brown to gray. Lignin enables the material properties of WPC (WPC) weakened, because the flammable during processing, and the release of carbon dioxide, can reduce the density of the product, will accelerate the fading of the WPC in outdoor exposure. Hemicellulose in the process is also flammable, released primarily VOC, wood materials can reduce product density, and make the product in the production process to produce steam blasting, mainly because of the instant decompression and the moisture in the entire wet wood particles a sharp boiling. Have a certain influence of the material properties of the wood fibers have an aspect ratio of WPC (WPC), the aspect ratio of the greater bend better performance, it is because the fibers in the melt flow direction of the more. Extrusion process will result in lower fiber aspect ratio. Aspect ratio greater the better the fluidity of the melt, the mold shrinkage of the material can be reduced. Composite panels for cladding (http://www.woodplasticcompositepanel.com/ WPC material, the cellulose content is more fade more serious, but the oxidation resistance of the material is increased, the hot melt viscosity will increase, but the smaller the particle size of the wood flour, the higher the viscosity. The timber usually contain tannins, with a black complex mixed trivalent iron, wood plastic (wpc) decking nails formed around the dark spot "tannin stain. WPC WPC has not rot, does not crack and deformation, non-toxic and harmless, no cracks and Splinter, anti-pest, weathering resistance, long service life and maintenance- 1, environmental protection The WPC inside and outside is the same kind of material, so do not have to worry about the strength decrease due to rot caused not like natural wood preservative treatment as regular brushing and do, eco-friendly material. 2, decay resistance Wood-plastic containing resin composition to prevent corrosion caused phenomenon, in experiments resistance decadent, not leaving rotting fungi reduce the weight, with moderate wood characteristics and decay resistance. 3, safety Verified through the the cutlery container of test, this product does not contain heavy metals safety material. Do not add harmful substances such as formalin, can be put to use. 4, the weather resistance WPC affected by the impact of the water, suitable for wet outdoor environment such as the seaside, compared with natural wood, you can rest assured that use. 5, pest resistance Termites trial, Bo WPC the decay amount of very meager, and do not have to worry about decay. The resin package can be protected in the wood flour structure around the products are not termites. 6, easy maintenance Because of its excellent characteristics, the lesion can be a simple fix, stain at can be simple to get rid of. Compared with natural wood, both economical and convenient. 7, Safe and secure WPC raw material crushed to hundreds of microns molding process, not like natural wood from the burr and cracking. End
|
|
