METHOD FOR PRODUCTION OF MOULDED ITEM AND MOULDED ITEM, WHICH REPRESENTS HOLLOW PIECE OR HOLLOW PROFILE Russian patent published in 2010 - IPC C08J5/00 

FIELD: technological processes.

SUBSTANCE: invention relates to method for production of moulded item, as well as moulded item, which represents hollow body or hollow profile. Substance of invention consists in the fact that moulded item is produced in process of condensation of polyamide moulding mass, polyamide component of which, depending on conditions of production, contains at least 5 part/mln of phosphorous in the form of acid solution, to compound containing at least two carbonate links, besides a) salts of weak acid are added to polyamide moulding mass prior to compounding in amount of 0.001-10 wt %, in equivalent to polyamide; b) mixture is produced of finished compound and combination containing at least two carbonate links; c) mixture, when required, is stored or transported; and d) mixture is converted into moulded item, besides in process of treatment mixture is first melted, then condensation is done at this stage. Object of invention is moulded item or hollow profile, which represents a gas line pipe, pipeline laid in the sea, supply line, cable channel, supply line for make-up stations, ventilation line, air intake, nozzle for tank filling, redundant tank or fuel tank.

EFFECT: simplified production of hollow items and hollow profiles with large diametres, increased efficiency and profitability of method for production of moulded items.

13 cl, 2 tbl, 4 ex