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.

Description

technical field [0001] The invention relates to a vapor permeable and waterproof shoe sole. Background technique [0002] The invention also relates to a shoe manufactured with said sole. [0003] The invention also includes methods of manufacturing said sole and said shoe. [0004] Soles that are both waterproof and vapor permeable have been around for years. [0005] In this way, the sole allows the water vapor produced by sweating on the soles of the feet to escape, which significantly improves the comfort of the shoes. [0006] For example, US 5,044,096 discloses a shoe sole of this type, which relates to a breathable shoe sole consisting of two layered parts, the upper and lower parts of the shoe sole respectively, which are made of rubber or other synthetic materials and provided with With through holes, the sole consists in inserting a water-impermeable but water-vapour-permeable membrane between them and sealingly connected to the two parts at its perimeter, not a...

AI Technical Summary

Problems solved by technology

[0019] In this embodiment, the injected polymer material may encroach on the protective layer, pass through the protective layer and, as a result, pose the risk of damaging the membrane or inhibiting its vapor permeability.

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