Vapor-permeable waterproof sole for shoes, shoe which uses said sole, and method for manufacturing said sole and said shoe

Abstract

A vapor-permeable and waterproof sole for shoes, comprising: a tread (14) provided with a plurality of through holes (15); a multilayer pack (16), which is arranged so as to be superimposed on the region where the through holes (15) are provided and comprises a membrane (17) which is permeable to water vapor and impermeable to liquids and a protective layer (18), which is arranged directly below the membrane (17). The tread (14) is of the type which is overmolded onto the pack (16); the tread (14) further surrounds the edges, the lower perimetric portion and the upper perimetric portion of the pack (16) so as to form a perimetric seal (24) which is adapted to avoid the rise of liquids. The pack (16) comprises a vapor-permeable or perforated layer-like element (19), which is arranged directly below the protective layer (18) so as to be superimposed on the region where the through holes (15) are provided; the layer-like element (19) is adapted to avoid the contact of the polymeric material for molding with the protective layer (18) during the step for molding the tread (14). The layer-like element (19) is further associated with the protective layer (18), forming with it at least one interface area (25) through which water vapor can flow, the area being adapted to facilitate vapor permeation.