Blowing Type HDPE Geomembrane
There are two ways of production for HDPE geomembrane in Europe, the United States and China, including the international blowing type HDPE geomembrane technology and the flat extrusion technology. The new geomembrane of the 85% existing imported HDPE geomembrane production line and the vast majority of the new built production line, is a blowing film production line. This is because the blowing type HDPE geomembrane producing process compared to flat extrusion process, has the following advantages:
1) For smooth geomembrane: two different production requirements process for the imported HDPE geomembrane resin raw materials of different melt index flat extrusion process of resin raw material is 0.11 g/10min (ASTM D1238 Cond.E test method), melt index for blowing type HDPE geomembrane producing process resin raw material is generally 1 g/10min (ASTM D1238 Cond.E test method). This is because of the requirement of advanced technology of the resin materials higher melt index of raw material requirements are higher, the tensile ductility of imported HDPE geomembrane products produced by this way is better, according to the actual construction level, the external load in Europe and America imported HDPE geotechnical membrane tensile ductility better the better (landfill, heavy machinery and other force).
2） From the previous construction experience, for the landfills and similar large area projects, generally speaking, the wider width of the imported HDPE geomembrane materials in Europe and America is generally recommended. The main reason is that the wider the width of the HDPE geomembrane imported from Europe and the United States is, the less welding seam is produced during the actual welding construction. The weld is the high incidence location of the leakage of geomembrane, the less the weld is, the less possibility of leakage is, and the better the anti-seepage effect is. In addition, the width of the width is increased and the weld is reduced, and two other favorable conditions for the project are also brought. One is to reduce the lap loss during the welding process: the HDPE geomembrane with the 8 m width in Europe and America and 7
Compared with the width of the narrow geomembrane, the loss rate in theory can be reduced by 14%, which is beneficial to the cost reduction of the project. Another point is to reduce the construction cycle of the project, as well as the corresponding human cost.
Contact: Nicky Li