What kind of production process is there for geomembrane?

Release time:

2024-04-29

Geomembrane is a widely used anti-seepage material, which has important applications in aquaculture, water conservancy projects, environmental protection and other fields. In the production process of geomembrane, blow molding and calendering are two common production processes.

Geomembrane is a widely used anti-seepage material and has important applications in aquaculture, water conservancy projects, environmental protection and other fields. In the production process of geomembrane, blow molding process and calendering process are two common production processes. They have obvious differences in process principles, product characteristics and application fields. Let's introduce in detail the difference between the blow molding process and the calendering process.

Blow molding process:
Blow molding is also called blown film. The blow molding process is to extrude molten plastic particles into a film shape through an extruder, then use airflow to blow the film into a cylindrical shape, and finally make it into a cylindrical shape through edge pressing and cooling. The process of producing a flat film of a certain width.
1. Large width: The geomembrane produced by the blow molding process can achieve larger width production and is suitable for large-area coverage needs.
2. Good continuity: During the production process, the geomembrane can achieve continuous production, which improves production efficiency.
3. Good uniformity: The geomembrane produced by the blow molding process has a smooth surface, uniform thickness, and good stability.
4. Strong durability: The geomembrane produced by the blow molding process can effectively resist external pressure and physical damage and has a long service life.

Calendering process:
Calendered film, also known as lamination film, is a plastic film produced by hot-melt cast extrusion of polyethylene raw materials.
1. Fast processing speed and high production efficiency;
2. Uniform thickness, no gaps, no bubbles, reliable quality;
3. High tensile strength and adaptable to different geotechnical environments;
4. It has good anti-seepage effect and can play a good role in waterproofing, anti-seepage and isolation.

The advantages of geomembrane products produced by the blow molding process are stable quality, uniform thickness, high vertical and horizontal tensile strength, and long service life. The disadvantage is that because special materials are used for blow molding, the price is higher than that of calendered geomembrane. The advantage of the geomembrane produced by the calendering process is that it has high surface brightness and is cheaper than the geomembrane produced by the blow molding process. Disadvantages: uneven thickness.

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