Manufacturing Process of LDPE Geomembrane

Release time：2025-11-08    Click：71

　　The manufacturing process of LDPE geomembrane typically involves the following steps:

　　Polymerization: Ethylene gas is polymerized under high pressure to form low - density polyethylene resin. This resin is the raw material for the production of LDPE geomembrane.

　　Extrusion: The LDPE resin is then melted and extruded through a die to form a thin film. The thickness of the film can be controlled during the extrusion process, depending on the specific requirements of the application.

　　Additive Incorporation: During the extrusion process, various additives such as UV stabilizers, antioxidants, and colorants may be added to the LDPE resin. These additives enhance the performance and durability of the geomembrane.

　　Calendering or Blown Film Process: After extrusion, the film may undergo a calendering process to further smooth the surface and improve its thickness uniformity. Alternatively, the blown film process can be used, which involves inflating the extruded tube of LDPE to form a bubble - like structure, resulting in a geomembrane with a more uniform thickness and better mechanical properties.

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