Teach you how to choose HDPE geomembrane?
First of all, we need to know that the quality of geomembrane is also good or bad. It mainly depends on the quality of raw materials, the difference in production process, and the ratio of raw materials.
First of all, we need to know that the quality of geomembrane is also good or bad. It mainly depends on the quality of raw materials, the difference in production process, and the ratio of raw materials. The price will be different for different quality, and of course it is also directly related to thickness. . Generally speaking, the quality of geomembrane can be divided into urban construction, national standard, old national standard and non-standard.
Among them, urban construction refers to the urban construction standard, which is a standard higher than the national standard. The tensile strength can reach 27MPa and the elongation rate can reach more than 700%. Generally, the imported low-pressure polyethylene raw materials are produced by the blown film process. The production requirements are higher, the quality of the finished product is better, the thickness is uniform, and all the indicators are higher than the ordinary national standard. Taking the urban construction film with a thickness of 0.5mm as an example, the current price is about 4.2 yuan/square meter.
The new national standard is a geomembrane whose index reaches the standard GB/T 17643-2011. It is generally produced with first-class materials, with a tensile strength of 20MPa and an elongation of more than 600%. Taking the national standard membrane with a thickness of 0.5mm as an example, the current price is about At about 3.6 yuan / square meter.
The implementation standard of the old national standard is GB/T 17643-1998. It is generally produced by mixing secondary materials and shed materials in a certain proportion. The ratio of secondary materials and shed materials is 7:3. The geomembrane has a length of 550% and a ratio of secondary material and shed material of 5:5. The strength of the geomembrane is 14MPa and the elongation rate is 450%. At present, the price of the old national standard thickness of 0.5mm is about 3.1 yuan/square meter.
Non-standard, also known as "enterprise standard", the tensile strength of the geomembrane produced by this standard is lower than 14MPa, and other indicators are also lower than the requirements of the national standard. Some projects with low service life requirements can save costs. Taking 0.5mm non-standard film as an example, the current ex-factory price is about 2.6 yuan/square meter.
It can be seen that the price of geomembrane is affected by many factors. The cost of raw materials, production process, raw material ratio, and even transportation costs and construction costs are constantly changing. Users should choose according to the needs of the project. The most suitable geomembrane, and at the same time, the products produced by reputable and powerful manufacturers should be selected, so as to achieve the best use effect.