|
(11) | EP 2 494 881 A2 |
| (12) | EUROPEAN PATENT APPLICATION |
| published in accordance with Art. 153(4) EPC |
|
|
|
|
|||||||||||||||||||
| (54) | METHOD FOR PRODUCING BACTERICIDAL, ANTI-ODOUR FOOTWEAR AND BACTERICIDAL, ANTI-ODOUR FOOTWEAR PRODUCED BY MEANS OF SAID METHOD |
| (57) Method for producing bactericidal, anti-odor footwear in which the inner face (2)
of a breathable footwear lining (1) is covered with a bactericidal, anti-odor substance
(3) that contains active charcoal and then the lining (1) is affixed to the inside
of the footwear. Said method gives rise to bactericidal, anti-odor footwear that has
a breathable lining (1) with a bactericidal, anti-odor substance formed by active
carbon on the inner face thereof. |
Technical field of the invention
[0001] The present invention belongs to the technical field of methods for producing footwear, specifically for producing bactericidal, anti-odor footwear.
Background of the invention
[0002] The sweating is a process that consists of the release of a salty liquid from the sweat glands of the body. This process is essential in order to help to stay the foot cool and is for this reason for which this should not be avoided but it should be eliminated from the footwear to keep the foot dry, clean and in perfect conditions of hygiene.
[0003] Until now most of the anti-odor and bactericidal methods consist of a bath of activated charcoal eventually together with, in some cases, a fungicidal agent, the action of which is limited to the inner bottom of the shoe, which is receptor of a part of the sweating but not of all.
[0004] That is, so far, the way of protecting the footwear against the smell of sweating and bacteria has been by means of deodorant insoles. These insoles are covered by a latex foam with active charcoal. This material has as a property the absorption of odors. The proportion of active charcoal in the compound of latex and air tends to be 25% by mass, this being incorporated as a burden of solids to the compound.
[0005] These methods have the disadvantage of being limited only to a part of the footwear, the insole, so the result of protected area does not use to be more than 20%.
[0006] In addition, hitherto the compounds of latex and activated charcoal were formed by a foam with higher or lower amount of air, and on the basis of the different air/latex/charcoal combinations it was achieved a greater or lesser density and thickness, but never a thickness under 3-5 mm, which in practice made it viable for the production of insoles which are attached in a fixed or overlaid way to the insole of the shoe, but not to be used as a lining in all the inner surface of a shoe, since the result would be a shoe of two-or three sizes greater than normal.
[0007] The bactericidal and fungicidal treatment only could be applied by mechanical spraying or by dripping in a bath and its effectiveness was dramatically reduced over time, becoming ineffective after subjecting the shoe to a washing process.
[0008] It was therefore desirable a method of production that would achieve a completely bactericidal, anti-odor footwear avoiding the disadvantages existing in the previous footwear in the state of the art.
Description of the invention
[0009] The present invention solves the problems existing in the state of the art by a method for producing bactericidal, anti-odor footwear, which includes the steps of covering the inner face of a breathable footwear lining with a bactericidal, anti-odor substance that contains active charcoal which consists of activated charcoal with silver-based biocidal agents. Subsequently said lining is affixed to the inside of the footwear giving to this an integrally anti-odor, bactericidal protection.
[0010] The bactericidal, anti-odor substance is made in the form of paste, or aerosol, and the covering of the inner face of the lining with this can be done by stamping or mechanical spraying.
[0011] By means of this method, the result of protected surface is 100%, because the lining covers the entire interior of the footwear, and in this case, the proportion of active charcoal in the biocidal compound reaches the 90% of the mass.
[0012] The covering of the lining with the bactericidal, anti-odor substance is carried out without air by foaming, which barely increases the thickness of said lining 0.10 mm, and their mechanical properties are not modified.
[0013] The present invention also includes as an object the footwear obtained using the previously described method. Therefore, the footwear of the present invention has a breathable lining, the inner face of which has a bactericidal, anti-odor substance which in turn is formed by active charcoal.
[0014] According to a preferred embodiment of the invention, additionally the bactericidal, anti-odor substance has silver, element that makes that the biocidal, antibacterial, and fungicidal properties are permanent, not losing its effectiveness over time as it was the case in the state of the art, and not being eliminated by the washing of the footwear.
[0015] Therefore, thanks to the embodiment of the present invention, the footwear has bactericidal properties avoiding the proliferation of bacterial colonies, and also due to the activated charcoal effect the bad odors produced by sweating are absorbed, not eliminating this property with the washing of the footwear. In addition, the resulting footwear is malleable, since the result of the covering of the bactericidal, anti-odor substance does not give rigidity to the lining, this being able to adapt to all kinds of shapes and volumes.
Description of the figures
[0016] Next in order to facilitate the understanding of the invention, in an illustrative, but not limitative way, an embodiment of the invention which refers to a series of figures is described.
Figure 1 shows the realization of a shoe object of the present invention already ended in which it can be seen the lining on the inside of this.
Figure 2 is a view of the lining affixed to the inside of the footwear in the Figure 1.
Figure 3 shows the lining that covers the area of the insole of the footwear in the Figure 1, in which said lining has been lifted to show its inner face with the bactericidal, anti-odor covering.
Figure 4 shows the lining that covers the area of cut of the footwear in the Figure 1, in which said lining has been lifted to show its inner face with the bactericidal, anti-odor covering.
Figure 5 shows a realization of the lining with the bactericidal, anti-odor coating disposed on a footwear insole.
[0017] In these figures reference to a set of elements is made, in which:
- 1. breathable footwear lining
- 2. inner face of the lining
- 3. bactericidal, anti-odor substance
Description of the preferred embodiments of the invention
[0018] The object of the present invention is a method for producing bactericidal, anti-odor footwear in which are included the steps of covering the inner face 2 of a breathable footwear lining 1 with a bactericidal, anti-odor substance 3 that contains active charcoal and then affixing the lining 1 to the inside of the footwear.
[0019] This covering of the inner face 2 of the lining 1 with the bactericidal, anti-odor substance 3 can be carried out by a method of stamping, if the substance 3 is in paste format, and otherwise by mechanical spraying procedure, if the substance 3 is in the form of aerosol.
[0020] Another object of the present invention is the bactericidal, anti-odor footwear obtained using the previous method. This footwear, as it can be seen in the figures, is formed by a breathable lining 1, in the inner side 2 of which has an affixed bactericidal, anti-odor substance 3, which has active charcoal.
[0021] According to a preferred embodiment of the invention, the bactericidal, anti-odor substance 3 has built-in silver, which achieves that biocidal properties are permanent.
1. Method for producing bactericidal, anti-odor footwear, characterized in that comprises the steps of:
- covering the inner face (2) of a breathable footwear lining (1) with a bactericidal, anti-odor substance (3) that contains active charcoal,
- and affixing the lining (1) to the inside of the footwear.
2. Method for producing bactericidal, anti-odor footwear, according to any of the previous
claims, characterized in that the covering of the inner face (2) of the lining (1) with the bactericidal, anti-odor
substance (3) is carried out by a method selected between mechanical spraying and
stamping.
3. Bactericidal, anti-odor footwear produced with the method of any of claims 1 to 2,
characterized in that it comprises a breathable footwear lining (1) on the inner face (2) of which has
a bactericidal, anti-odor substance (3) that contains in turn active charcoal.
4. Bactericidal, anti-odor footwear, according to the previous claim, characterized in that the bactericidal, anti-odor substance (3) additionally comprises silver.