METHOD OF ARRANGING MULTILAYERED ICE COVER FOR HOCKEY Russian patent published in 2009 - IPC F25C3/02 C09K3/24 

FIELD: heating.

SUBSTANCE: technical effect consists in enhancement of the ice resistance to destructive loads associated with hockey playing, improvement of the ice plasticity and the ice surface slip properties. In accordance with the method proposed on initially provides for freezing on a lower adhesive layer at least 1 mm thick with admixture of a composite in an amount no more than 50 ppm which is represented by water suspension of polytetrafluorethylene and/or a tetrafluorethylene-hexafluorpropylene copolymer and/or perfluordecaline. One provides for cyclically freezing on layers of varied chemical composition. Within one cycle one successively applies several clear (containing no admixtures) ice layers and several modified layers containing admixtures of ammonia in an amount from 1 ppm to 100 ppm and water suspension of polytetrafluorethylene and/or a tetrafluorethylene-hexafluorpropylene copolymer and/or perfluordecaline in an amount from 0.1 ppm to 50 ppm. The aggregate thickness of modified layers within a single cycle is no more than 2 mm. The aggregate thickness of clear ice layers within a single cycle is no less than 5 mm. After application of the lower layers on the hockey ground underlayer one provides for freezing on upper modified layers containing admixtures of ammonia in an amount from 1 ppm to 100 ppm and water suspension of polytetrafluorethylene and/or a tetrafluorethylene-hexafluorpropylene copolymer and/or perfluordecaline in an amount of approximately 50 ppm.

EFFECT: enhancement of the ice resistance to destructive loads associated with hockey playing, improvement of the ice plasticity and the ice surface slip properties.

5 cl, 1 dwg, 6 ex