Wood-plastic composite materials: the use of a wide range of new environmentally friendly packaging
in Top Real Estate Developers
Fri Feb 10, 2017 12:08 pm
• 1 Post
Wood-plastic composite materials are made of waste plastics, wood flour (such as wood chips, bamboo powder, rice husk, straw, etc.) as raw materials, according to a certain percentage of mixing, and add special additives, high temperature, extrusion, Of a new type of composite materials. Its excellent performance, versatile, environmentally friendly and have broad prospects for development, it is worth vigorously research and development promotion. Wood powder (or fiber powder of crops) as an organic filler of plastic, with a wide range of sources, low cost, low density, good insulation and many other inorganic fillers can not match the excellent performance. But it is not as inorganic fillers that are widely used, mainly due to: First, the compatibility with the matrix resin is poor; Second,[ the thermoplastics in the dispersion of poor dispersion, resulting in poor mobility and extrusion processing difficulties . As the main component of wood powder is cellulose, containing a large number of hydroxyl groups, the formation of intermolecular hydrogen bonds or intramolecular hydrogen bonds, so that wood powder has a water absorption, and very strong. The majority of thermoplastic non-polar, with water, so the compatibility between the poor, the interface of the adhesive force is very small, need to use additives to improve the surface of plastic and wood flour to improve their Interface affinity. Modified wood flour has enhanced properties, can well transfer the stress between the filler and the plastic, so as to enhance the strength of the role of composite materials.