How does PE film provide superior waterproof performance?
Publish Time: 2025-03-27
The reason why PE film (polyethylene film) can provide superior waterproof performance is mainly due to its unique physical structure and chemical properties.1. Physical structure characteristicsPolymer structure: PE film is made of polyethylene polymer material, and its molecular chain structure is tight and orderly arranged, forming a dense film structure. This dense structure makes it difficult for water molecules to penetrate the film, thus achieving a superior waterproof effect.Surface smoothness: The surface of PE film is smooth, which reduces the chance of water adhering to and penetrating its surface. The smooth surface is also easy to clean and maintain, further enhancing its waterproof performance.2. Stable chemical propertiesChemical stability: The particularity of the polyethylene molecular chain structure makes it have excellent chemical corrosion resistance and can resist the erosion of various acid, alkali and salt solutions. This chemical stability ensures that PE film can maintain its physical properties and morphological stability for a long time in complex environments, and is not easy to degrade or produce obvious physical damage.Weather resistance and UV resistance: PE film has a certain resistance to external environmental factors such as ultraviolet rays, oxygen and water vapor. This enhances its service life and ensures a long-term stable waterproof effect in outdoor environments.3. Waterproof principlePores and channels: In some PE breathable films, by adding special calcium carbonate and extruding film and directional stretching, interconnected winding pores or channels are formed. These pores and channels allow water particles to penetrate in the water vapor state, but when the water vapor condenses into water droplets, due to the surface tension of the water droplets, the water molecules cannot smoothly break away from the water droplets and penetrate to the other side, thus achieving the waterproof function.Water barrier measurement: The water barrier of PE film is usually measured by water pressure resistance. When the water pressure exceeds the water pressure resistance value that the film can withstand, water will leak out. Therefore, high-quality PE film has an extremely high water pressure resistance value, which can ensure that no water seepage occurs under normal use conditions.4. Application scenariosConstruction field: PE film is widely used in building waterproof layers, especially in the construction of underground projects and waterproof layers, as an important waterproof material to resist the penetration of soil and groundwater.Geotechnical engineering: In projects such as landfill, dam construction and groundwater isolation, PE film effectively prevents the penetration of water and pollutants and protects soil and groundwater resources.Agricultural application: As a mulch covering material, PE film can inhibit weed growth, reduce water evaporation and soil erosion, while increasing soil temperature and promoting crop growth.In summary, PE film has demonstrated superior waterproof performance in many fields due to its dense physical structure, stable chemical properties and unique waterproof principle. These characteristics make PE film one of the first choices for waterproof materials, providing a reliable waterproof solution for various application scenarios.
