ziba mohammadi sed and broadcasting news agency alwaj doll urmia specialists of a knowledge-based company succeeded by combining knowledge and creativity of practical products made of polyethylene, producing lightweight and fireproof houses and sewage and floating structures. these products are among the products that have been exported to 35 countries in addition to the development of the domestic market. heavy ethylene is an unbranched polymer chain that has a higher tensile strength than other types of materials due to its high intermolecular force. a knowledge-based company has achieved new technologies . inside is the material that is used we use polyethylene materials. one of the advantages of these polymer materials is that they are fireproof and flexible in the aerospace industry, in shipping, in the construction industry , in fisheries, in all fields. that harms the environment, let's see it together, from blood to fences, floating docks and fish breeding cages with yachts, large houses for all kinds of weather from north to south in a rectangular circle and two floors to the hal