Is there a high requirement for the smoke density of the flame retardant for PVC wood-plastic composites?

Wood-Plastic Composite (WPC for short) is a new type of composite material. It uses thermoplastic plastics such as polyethylene (PE), polypropylene (PP), polyvinyl chloride (PVC), etc. as the matrix resin, and wood powder, plant seed shells, plant straw powder and other woody powder materials as the filling materials. With the addition of certain processing aids, it is prepared through molding processing methods such as compression molding, extrusion, and injection molding. 

Wood-plastic composites combine the characteristics of both wood and plastic. On the one hand, they have a woody texture similar to wood in appearance. On the other hand, they possess properties similar to plastics, such as wear resistance, water resistance, corrosion resistance, UV resistance, and good dimensional stability. The raw materials have a wide range of sources, and waste wood powder, wood chips, wood fiber, etc. can be recycled and reused, which is in line with the current theme of green environmental protection. 

At the same time, compared with the defects of wood such as being easily damaged by insects, difficult to color, and having a relatively short service life, wood-plastic composites can significantly improve many performance aspects. They are also easy to prepare during the molding process and can be processed and formed for the second time. In addition, by making full use of waste wood fiber resources such as recycled wood scraps, the utilization rate of natural wood can be greatly increased, resource waste can be reduced, production costs can be lowered, and economic benefits can be improved. 

Therefore, due to its great development potential and broad development prospects, wood-plastic composites have attracted the attention of more and more scholars. 

According to the type of matrix resin, it can be divided into polyethylene-based wood-plastic composites, polypropylene-based wood-plastic composites, polyvinyl chloride-based wood-plastic composites, polystyrene-based wood-plastic composites, etc. Among them, polyethylene-based wood-plastic composites are the most commonly used type. According to whether it is foamed or not, it can be divided into foamed wood-plastic composites, non-foamed wood-plastic composites, etc. According to its functionality, it can be divided into flame-retardant wood-plastic composites, mildew-proof wood-plastic composites, heat-oxygen-resistant wood-plastic composites, etc. 

Hangzhou Jinwei Nano: Flame retardants for wood-plastic composites, mildew-proof agents for wood-plastic composites, anti-aging agents for wood-plastic composites, anti-aging agents for PVC, PP flame retardant masterbatches, anti-aging agents for suspended floors, anti-aging agents for sunshade nets, anti-aging agents for lawns, flame retardants for silicone rubber, and flame retardants for cable filler ropes.