Food grade plastic containers are made from polyethylene or propylene, usually by rotational molding, blow molding, or seamless welding. Rotational molding technology allows to obtain seamless products with increased strength. When using the blowing method, the raw material is melted by extruders (machines for molding plastic materials), after which a blank is formed, which is placed in a mold of the required volume. A closed mold is supplied with air under pressure, which leads to the creation of a product with the desired geometric parameters.
