Polyethylene film for building waterproof isolation layer.
The technical parameters of polyethylene film include the following:
tensile breaking strength, elongation at break, puncture resistance, right-angle tear strength, water vapor permeability coefficient and other indicators. Implementation standard GB/T17643-2011 requirements.
1: Tensile breaking strength of polyethylene film 8N/mm (Newton)
Breaking strength refers to the tensile force that the material can withstand before breaking. The film is made of PE material, which has high strength and can withstand greater pressure and tension under different environmental conditions. According to the relevant industry standards, its tensile breaking strength is generally above 8N/mm, which can meet the needs of building waterproof isolation layer.
2: The elongation at break of polyethylene film is 600%.
Elongation at break is an important indicator to measure the ductility of the material during the stretching process. It indicates the degree of tensile deformation of the material when it is stretched to break. The elongation at break is usually around 600%. This means that when the geomembrane is stretched by external force, it can extend at least 6 times or even more on the basis of its original length. This high elongation at break ensures the good ductility of the film under engineering stress, so that it can adapt to various complex geological environments.
3: The right-angle tear load of polyethylene film is 45N (Newton)
The tear load represents the ability of the material to resist tearing, and it plays an important role in geotechnical engineering. The tear load of the film is tested according to the standard GB/T17643-2011. According to the standard, the tear load is tested on a standard specimen. The size of the standard specimen is 15mm×75mm, there is a 50mm incision on the specimen, and the tearing direction is longitudinal tearing. The tear load is the force that the specimen bears during the tearing process.
According to the test results, the tear load of the polyethylene film is 45N. This value represents the tear resistance of the film under certain conditions. It should be noted that in actual use, the ambient temperature, storage and use of the material, etc. will affect the tear load.
4: The puncture resistance of polyethylene film is 50N (Newton)
The puncture resistance of polyethylene film refers to the ability of the film to resist puncture by external sharp objects under certain conditions. It has the dual functions of waterproofing and preventing plant roots from penetrating. It can withstand plant root puncture and maintain waterproof function for a long time. It can form a high-strength waterproof layer. The puncture resistance can be obtained by experimental testing. During the test, puncture materials are usually used to simulate the actual situation, such as steel needles or other sharp objects. For 0.4 thick polyethylene film, its puncture resistance is mainly affected by the following factors: Material density: The density of polyethylene film is one of the important factors affecting the puncture resistance. Generally speaking, the higher the density, the better the puncture resistance. Type and content of additives: In the production process of polyethylene film, various additives can be added to increase its performance.
Five: The water vapor permeability coefficient of polyethylene film is 1.0×10-12g.cm/(c㎡.s.pa)
The water vapor permeability coefficient refers to the amount of water vapor passing through the film per unit area per unit time, reflecting the film’s barrier ability to water vapor.