What is the permeability coefficient of HDPE impermeable plastic geocells manufacturers? Due to its chemical structure, polyethylene is a (substantially) impermeable substance. Polyethylene is composed of very long molecules, and indeed there is molecular space (sometimes called "free space") between individual polyethylene chains. When we say that polyethylene is essentially non-permeable, the existence of these spaces is also recognized. Osmosis can also occur, for example, when the pressure of the permeate is very high or the molecules of the permeate are very small. However, the degree of penetration shown by polyethylene is difficult to determine using existing test methods. Therefore, the test results often reflect the imprecision of the test process rather than the permeability of the material. An independent laboratory conducted tests on HDPE impermeable membranes and obtained the following results: It must be emphasized that due to differences in molecular shape, polarity and state (gaseous or liquid), different chemicals will have different permeability. For example, relatively small water molecules (atomic weight 18) will penetrate polyethylene more easily than larger molecules such as cyclohexanol (atomic weight 94). The polarity of the molecules must also be considered (similar to the proverb "similarities blend together"). HDPE impermeable biaxial geogrid for sale polyethylene is a non-polar molecule, so other non-polar molecules can be larger than polar molecules such as water. For reference, polyethylene is usually used as a packaging for raw materials including gasoline, motor oil, household cleaners (ie bleach), muramic acid, pesticides, insecticides, fungicides and other highly concentrated Chemicals. Some chemicals may be absorbed by other materials, but this will only happen at very high concentrations. These chemicals include halogenated hydrocarbons or aromatic (aromatic) hydrocarbons in concentrations exceeding 50%. Their absorption causes swelling and slight changes in physical properties, such as increased elongation. This includes many types of fuels and oils. However, this does not affect the ability of HDPE impermeable 3D geonet for sale liners to act as impermeable barriers for these materials. As a result, the permeability of HDPE impermeable membranes is usually extremely low, which is almost negligible.
