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Co-extrusion outdoor plastic wood composite materials continue to innovate
Plastic wood composite materials have excellent comprehensive performance, and there are more and more varieties and quantities of plastic wood composite materials used in outdoor buildings and landscapes. With the continuous improvement of manufacturing technology and process, the appearance quality of products has greatly improved. However, many plastic wood composite companies, and even many large brand companies, have inherent defects in material design due to the lack of targeted research. These shortcomings often only gradually exposed the problems after two or three years of completion. At this time, it is too late to solve the problems. When tracking down issues, material design defects are often difficult to detect. Thermoplastic polymer materials are viscoelastic materials and will undergo stress creep under long-term stress. This is determined by the characteristics of thermoplastic polymer materials. The main influencing factors are the size of the long-term stress and the ambient temperature. The combination of the advantages of polymer materials and plant fibers makes plastic wood composite materials have a comprehensive advantage compared with other materials for outdoor use. This is also the fundamental reason for the rapid growth and development of plastic wood composite materials in landscape and outdoor buildings.
After a period of use of outdoor plastic wood composite buildings and landscapes, the surface of plastic wood composite often appears chalking and fading, which affects the viewing. Plastic wood composite materials used outdoors are exposed to the sun and rain, and the environmental requirements are strict; usually inorganic pigments with excellent resistance to natural aging are used to ensure the durability of the coloring. The phenomenon of pulverization and fading often occurs because one is the aging of the polymer surface layer of the plastic wood composite, and the other is that the inorganic pigments are often corroded by rain with low pH value (commonly known as acid rain). In the design of plastic wood composite performance, anti-aging additives are often evenly distributed. Aging actually develops gradually from the outside to the inside. Therefore, improving the aging resistance of the plastic wood composite surface layer is an important way to solve the surface chalking and fading; at the same time, the ability to resist acid rain should be enhanced in the pigment formulation.
In recent years, with the development of technology, high-end plastic wood composite co-extruded plastic wood composite has emerged. It adopts the most advanced extrusion molding surface uniformly and firmly covered with co-extrusion layer. The use of this new technology to produce co-extruded plastic wood composite, in addition to retaining the advantages of traditional plastic wood composite's anti-mold, insect-proof and other physical properties, it also has stronger wear resistance, scratch resistance, stain resistance and weather resistance, and is more beautiful and durable. It is suitable for high-end outdoor garden landscape engineering, construction template, villa, courtyard floor and other fields.