SI22828A - Footwear protected by microperforated water repellent layer - Google Patents

Abstract

Subject of the invention is footwear protected by a microperforated water repellent layer (1) from microperforated (3) water repellent material either as a whole or in mechanically less exposed parts of the footwear. The microperforated material (3) is characterised in that it consists of two layers, out of which the external layer (5) is smooth and the internal layer (6) is water repellent since it is made from woven or non-woven textile. Both layers are inseparably linked and perforated with small openings (4) whose diameter does not exceed the thickness of the external layer, preferably it is smaller than 0.1 mm and there are more than ten of them per cm2.

Description

Footwear protected by micro perforated water repellent coating

The object of the invention is footwear, which is protected from the penetration of water into the interior by a water-repellent layer, which is mechanically or otherwise treated in such a way that the water-repellent layer is punctured by a series of very small holes. The invention belongs to Class A43B23 / 06 of the International Patent Classification.

A technical problem to be solved by the proposed footwear construction is protection against the ingress of water into the footwear and at the same time the transfer of water vapor from the inside of the footwear to the room.

It is well known that the human body must be protected from too low a temperature of 15, especially against the effects of atmospheres such as rain and snow. This is why we protect the foot with waterproof footwear. Such a well-known solution has the bad property of not allowing the foot to breathe and therefore causes an unpleasant sensation and excessive sweating. There are various solutions to the problem described with different semi-permeable membranes that prevent water from entering the footwear while allowing limited air and water vapor flow. The disadvantage of these solutions is that they require an external protective layer to protect against mechanical damage, which is not impermeable and usually in the form of fabric or leather. Both the fabric and the leather absorb water, thereby increasing its mass, which means more effort in the use of footwear and also reduced thermal insulation. Also, due to the roughness of the fabric surface, the coefficient of friction between the fabric and the snow is greater than that between the snow and a completely smoother surface than, for example, the water-repellent material. During movement in the wild at any time of the year, we are repeatedly exposed to the effects of water or snow by covering a larger surface of the shoe. Smooth surface allows faster removal of snow or water from the shoe and thus shorter exposure of the shoe material to water. Reducing the time when footwear is covered with water or snow means reducing the possibility of water penetrating the footwear and increasing the time when footwear can breathe.

The invention will be explained in more detail on the basis of an embodiment and illustrations of which:

Figure 1 Footwear, consisting of the upper part 1 and the sole 2, the entire upper part of which is made of micro-perforated material 3

Figure 2 footwear, the upper part of which is only partly made of micro-perforated material 3 and the part is made of water-repellent material 7

3 is a cross-sectional view of a micro-perforated material with schematically shown holes of a micro-perforation 4 with an outer water repellent layer 5 and an inner reinforcement layer 6

Figure 4 is a schematic view of the micro perforated material 3 and the arrangement of the holes of the microperforated 4.

Design solution for the production of footwear made of micro-perforated material in the form of small holes arranged over the surface of the material, which are substantially smaller in diameter than the total thickness of the material. The micro-perforated material is at least two-layer, consisting of an outer smooth and water-repellent layer 5 and an inner reinforcement layer 6, either woven or non-woven, with the two layers joined together so that the outer layer remains smooth on the outside. The micro perforation itself is made with small holes no larger than the thickness of the outer smooth layer material, preferably less than 0.1 mm in diameter, and made sufficiently dense to allow sufficient material to breathe, preferably more than 10 holes per cm ² .

Claims (2)

1. Footwear protected by micro perforated water repellent coating 5, characterized in that its upper part (1) is made of micro-perforated material, which is made of two layers, of which the outer water is repelled (5) and smooth and the outer reinforcing layer (6) is made of woven or nonwovens 10 and are inseparably joined and machined such that small holes (4) smaller than the thickness of the outer layer are made through both materials prior to use in the manufacture of footwear and are small enough to prevent water from flowing through them due to capillary pressure , but big enough to get through 15 these holes radiate. Footwear according to claim 1, characterized in that the upper part of the footwear (1) is made of water repellent 20 material (7) in those parts which are most mechanically loaded and the remaining parts made of micro perforated material.