Patent ID: 8245417
Filing Date: 2012-08-21
Classification: A43B,B29D,Y10T

Abstract:
1. A vapor-permeable and waterproof sole for shoes, comprising: a tread provided with a plurality of through holes; a multilayer pack, which is arranged so as to be superimposed on the region where said through holes are provided and comprises a membrane which is permeable to water vapor and impermeable to liquids and a protective vapor-permeable or perforated layer, which is arranged directly below said membrane; said tread being overmolded onto said pack, said tread further surrounding the lower perimetric portion, the upper perimetric portion and the edges of said pack so as to form a perimetric seal which is adapted to avoid the rise of liquids, wherein said pack comprises a vapor-permeable or perforated layer element, which is arranged directly below said protective layer so as to be superimposed on the region where said through holes are provided, said layer element being adapted to avoid the contact of a polymeric material for molding with said protective layer during the step for molding the tread, said layer element being further associated with said protective layer, forming at least one interface area through which water can flow, between said protective layer and said layer element, said area being adapted to facilitate vapor permeation, wherein said layer element is constituted by water-repellent and vapor-permeable material, which is capable of creating a barrier to the polymeric material which constitutes said tread, and wherein said layer element is constituted by one of the following materials: nonwoven fabric or pile fabric or needle felt, leather, microporous EVA.