LOW-DENSITY POLYETHYLENE Low-density polyethylene (LDPE) is a polymer, thermoplastic received in the result of the processing of monomer ethylene at high pressure. It is also called high-pressure polyethylene. By its nature, it is an elastic and soft material with unique structure, which is polymerizing in a radical way under the pressure from 1000 to 3000 atmospheres and at a temperature of 180 degrees. As it was noted, low-density polyethylene is sufficiently a soft material, which by the way is distinguishing by the perfect dialectical properties. Thus, it allows using the material in different manufacturing processes. Low-density polyethylene possesses exclusive properties and valuable features. It’s about such peculiarities as: Low-density polyethylene is widely used in wrapping film production, as well as in the manufacturing of containers

HIGH-DENSITY POLYETHYLENE HDPE (high-density polyethylene) is polyethylene obtained at low pressure. There are three main ways to obtain low-pressure polyethylene: The polyethylene of the first type of its obtaining is manufactured without additives and with dyes and stabilizers. The gas-phase option of this material is produced in the shape of compositions with stabilizers. Properties and use Speaking about the properties and the scope of use of this polymer, it should be emphasized that high-density polyethylene is a truly unique material. It possesses a great number of exclusive properties due to its chemical content and it makes high-density polyethylene mote versatile polymer in comparison with others. So, the high-density polyethylene is a type of polymer that is known as the material of wide application in modern

POLYETHYLENE What is polyethylene? Polyethylene is a synthetic thermoplastic and non-polar polymer, i.e. a substance with a long molecule, formed by the combination of a number of monomer molecules. It is one of the most common materials in the world. Polyethylene production The ethylene polymerization process obtains this product. Depending on the polymerization conditions, i.e. long molecules formation, polyethylene gains its properties. The colorless gas ethylene is a basis of polyethylene. It is obtained after reproduction of petroleum products – straight-run gasoline, the gas-oil, etc. The substance that is got in the process of polymerization possesses exclusive properties like: In addition, polyethylene can be used as isolator due to its dielectric property. Polyethylene is one of the most common polymers worldwide. Currently, there are three

POLYPROPYLENE DIFFERENT GRADES One of the most versatile and widely available materials is polypropylene. In composition, polypropylene is a linear odorless and colorless hydrocarbon polymer designated as CnH2n. This material is a result of propylene polymerization in the presence of metal complex catalysts. The process of polypropylene production is similar to the high-density polyethylene production process. Depending on the definite catalysts type it is possible to get any type of polymer. Polypropylene is produced in the form of white powder or granules with a packed density of 0.4-0.5 g/cm3. Also, this material is produced in a stable form, painted and unpainted. Unlike the polyethylene it harder and more heat resistant. Due to its properties, polypropylene is considered a versatile material mostly used in the field