MANUFACTURING METHOD OF MULTI-LAYER ICE COVER FOR FIGURE-SKATING Russian patent published in 2009 - IPC F25C3/02 C09K3/24 

FIELD: systems.

SUBSTANCE: manufacturing method of multi-layer ice cover for figure-skating includes formation of underbase with at least one layer which contains additions of ammonia and water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin. First, low adhesive layer not less than 1 mm thick is frozen, and there added is not more than 50 ppm of the composite- water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin; then, low modified water layers with various chemical composition of additions are frozen subsequently so that concentration of the addition- water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin can uniformly increase from the first layer of low modified layers to the final layer of low modified layers within 0.1 ppm to 50 ppm and total thickness of low modified layers is not less than 30 mm, and freezing of upper modified layers is performed immediately after low modified layers have been applied; at that, total thickness of upper modified layers is not less than 10 mm, and each of upper layers contains additions of ammonia in number of 1 ppm to 100 ppm and additions - water suspension of polytetrafluoroethylene and/or copolymer of tetrafluoroethylene with hexafluoropropylene and/or perfluorodecalin in number of 50 ppm to 100 ppm.

EFFECT: manufacturing high-elasticity ice.

5 cl, 1 dwg