Classification Of Geomembranes

  • Geomembrane type and manufacturing principle, pond liner textured hdpe geomembrane made in china is a relatively impervious geosynthetic material. According to different raw materials, it can be divided into two categories: polymer and asphalt. In order to meet different strength and deformation needs, there is no reinforcement. Reinforcement classification, according to the production process classification of geotextiles, can be divided into blow molding geomembrane, calendering geomembrane, extrusion geomembrane. A. Blow molding geomembrane. The blow molding method is also called the tube film method. The blow molding method can be defined as: the resin is melted and plasticized by the extruder, and then extruded through the annular die to form a thin-walled tube blank, which is inflated, cooled, and cut open. The geomembrane obtained by flattening is a blown geomembrane. The principle of blow molding geomembrane manufacturing: the polymer and its auxiliary agent are put into the externally heated extruder through the hopper of the extruder, and then the screw, the compression, the metering action of the screw rotating through the extruder will be The material is melt-plasticized, and the tube blank in a molten state is extruded from an annular die. After the outlet end of the tube blank is melted, compressed air is blown from a vent hole in the center of the mold, and the tube is produced by a geomembrane manufacturer. Gradually expanding under the action of compressed air, at the same time, the outside of the tube blank is forcedly cooled. At this time, the end of the tube blank is forced to move at a uniform speed. At this time, a continuous cylindrical geomembrane can be obtained. The geomembrane is cut open and flattened to obtain a film (sheet) shape. B. Calendering geomembrane. A calendering geomembrane can be defined as a method in which a thermoplastic plasticized plastic is passed through two or more counter-rotating rolls to form a predetermined size and used for a geomembrane (or sheet) of geotechnical materials, calendering geotechnical The high polymer material used in the membrane mainly refers to the classification of polyvinyl chloride and calendered geomembrane: the calendering geomembrane can be divided into a single layer of polyvinyl chloride geomembrane, a double layer of polyvinyl chloride composite geomembrane and a meshed polyvinyl chloride composite geomembrane.