Geonet is made of high-density polyethylene or other high-molecular polymers as raw materials, added with anti-ultraviolet additives and other auxiliary materials, and extruded into a flat net structure product. Plastic geonets are divided into two series, engineering nets and drainage nets, according to their uses. The widths of the plastic geonet are: 1m, 1.5m, 2m, 2.5m. The carbon black content of the black plastic geonet is >1 percent .