JP2009160058A - Insole for shoe - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an insole capable of adding an antibacterial function and a deodorization function, or the like to the inside of a shoe, capable of retaining these functions for a long period, capable of being easily manufactured, and capable of having designability. <P>SOLUTION: A resin coating layer 32 including first metal powder and a resin coating layer 33 including second metal powder with a tendency of ionization different from that of the first metal are formed on the surface of the insole (fabric 30 and urethane layer 31). It is preferable that the resin coating layer 32 including the first metal powder and the resin coating layer 33 including the second metal power are printed as patterns on the surface of the insole. When perspiration 35 flows out of a foot 34 when a user wears shoes with the insoles for shoes put inside the shoes, potential is generated between the metal A in the resin coating layer 32 and the metal B in the resin coating layer 33 with the perspiration 35 as the electrolyte, and weak electric currents flow inside the body or on the surface of the body of the user. With the weak electric currents, the oxidation-reduction reaction occurs in the electrolyte, and fatty acid, or the like which is a cause of smell, is decomposed and bacteria are killed by the oxidation reaction. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an insole for shoes, and more particularly to an insole for shoes that can impart antibacterial function and deodorant function, etc. in the shoe, and can maintain these functions for a long time and can be manufactured extremely easily. is there.

Conventionally, various types of insoles for shoes are commercially available, and those having an antibacterial function, a deodorizing function, and the like are known as functions of the insoles for shoes. For example, regarding the deodorizing function, there is one in which a deodorant is attached to a shoe insole, and there are an adsorption type and a reaction type as the deodorant.
However, the adsorbing type deodorant attached to the insole for shoes deteriorates the adsorption performance as the odor component is adsorbed, and as a result, the odor component is gradually released without being adsorbed. The odor function gradually decreases, and eventually the deodorization function is completely eliminated. In the case of a reaction type deodorant, if the drug reacts with the odor component or the like and the drug is consumed, the deodorization function gradually decreases, so the odor component is released without reacting with the drug. As a result, the deodorizing function gradually decreases, and finally the deodorizing function is completely eliminated.

  As an insole for shoes having an antibacterial function, an insole attached to an insole for shoes is known. However, the antibacterial function is not exhibited when an antibacterial agent and a deodorant are attached to the insole for shoes. Therefore, it has been difficult to provide an insole for shoes having an antibacterial function and a deodorizing function.

Therefore, a metal plate or foil having an area corresponding to the back surface of the large spherical protrusion on the foot portion is bonded. Further, a health insole has been proposed in which at least one small-diameter metal plate or foil having a small diameter is attached to the toe portion and the entire back surface of the material is covered with double-sided tape (see Utility Model Registration No. 306495).
It is described that this health insole can impart an antibacterial function and a deodorizing function by the action of a weak current flowing between different kinds of metal plates and foils. However, double-sided tape is used to attach dissimilar metal plates and foils to the insole, but the adhering work is complicated and dissimilar metal plates and foils attached to the insole are used. Inconvenience is likely to occur when it is shifted in or out.

In addition, a shoe insole provided with a thin simple capacitor formed by winding a long film formed by bonding a metal foil a plurality of times or alternately folding a long film is proposed (Japanese Patent Laid-Open No. 2002-165610). ).
This insole for shoes is described that a bioelectric current is smoothed by an electrostatic induction action generated between metal foils, blood circulation is improved, and as a result, generation of waste products is suppressed and a deodorizing effect is exhibited. Yes. The thin simple capacitor is sandwiched between sheets having a substantially insole layer structure.
However, in the case of such an insole, even if the blood circulation action and the deodorizing effect are exhibited only in the area where the thin simple capacitor is installed and the vicinity thereof, it is not expected that these actions are exhibited in the entire insole. .

Utility model registration No. 306495 JP 2002-165610 A

  The object of the present invention is to provide an insole for shoes that can impart antibacterial function, deodorant function, etc. in the shoe, can maintain these functions over a long period of time, and can be easily manufactured, and can also provide design properties. Is to provide.

The above object is achieved by a shoe insole described below.
That is, the insole for shoes of the present invention is
<1> For a shoe characterized in that a resin coating layer containing a first metal powder and a resin coating layer containing a second metal powder having a different ionization tendency from the metal are formed on the insole surface. Insole.
<2> The resin coating layer containing the first metal powder and the resin coating layer containing the second metal powder having a different ionization tendency from the metal are printed in a pattern on the insole surface, respectively. The insole for shoes according to <1>.
<3> The insole for shoes according to <1> or <2>, wherein each of the first metal powder and the second metal powder has a scale shape.
<4> The <1> to <1>, wherein the first metal powder and the second metal powder are each selected from the group consisting of platinum, gold, silver, titanium, zinc, copper, aluminum, tin, and iron. The insole for shoes according to any one of <3>.
<5> The shoe insole according to <4>, wherein the first metal powder is scaly zinc and the second metal powder is scaly silver.

  According to the insole for shoes of the present invention, an antibacterial function, a deodorizing function, and the like can be imparted to the shoe, and these functions can be maintained for a long period of time, and can be easily manufactured, and can also be provided with design properties. .

  In the insole for shoes of the present invention, a resin coating layer containing a first metal powder and a resin coating layer containing a second metal powder having a different ionization tendency from the metal are formed on the insole surface. It is characterized by. Hereinafter, for convenience, the insole before the resin coating layer containing the first metal powder and the resin coating layer containing the second metal powder having a different ionization tendency from the metal is simply referred to as an insole, The insole in which a resin coating layer containing a first metal powder and a resin coating layer containing a second metal powder having a different ionization tendency from the metal are described as a shoe insole.

  In the present invention, the first metal powder or the second metal powder is a metal powder having a different ionization tendency. As the metal, for example, a metal selected from the group consisting of platinum, gold, silver, titanium, zinc, copper, aluminum, tin, and iron and having different ionization tendencies among these metals is the first metal powder. And second, it can be selected as a metal powder. Among these metals, a combination of silver and zinc is preferable from the viewpoint of performance and cost.

  Since the above metal is used in the form of powder, it is preferable that the metal that is not easily oxidized or a shape that is not easily oxidized. As the oxidation of the metal proceeds, it becomes difficult for electricity to flow, and the above-described electrolytic reaction does not occur efficiently. Although there is no restriction | limiting in particular as a shape of a metal powder, A scale-like shape is preferable, and when a foot touches an insole, it gives a tingling touch and it is preferable to avoid as an insole product.

  When the shape of the metal powder is scaly, even when the amount of scaly metal contained in the resin coating layer is relatively small, the scaly metal contacts in the resin coating layer and functions as an electrode. Stable energization is obtained, and the scale-like shape has an advantage that it is difficult to oxidize because it has a smaller surface area compared to powders of other shapes.

  The particle size of the metal powder is 1 to 100 μm, preferably 5 to 20 μm from the point that a resin solution containing these metal powders is applied to the insole surface by printing or the like to form a resin coating layer on the insole surface. . If the particle size of the metal powder is less than 1 μm, the metal powder is too small, so the distance that the metal powders come into contact with each other is short, and there is a tendency for disconnection in the resin coating layer. If it exceeds 100 μm, the metal powder is likely to be exposed on the surface of the resin coating layer, and the surface of the resin coating layer tends to be rough.

  The amount of the metal powder contained in the resin coating layer is such that the resin coating solution containing the metal powder has no hindrance in coating properties, and the resin coating layer containing the metal powder can function as an electrode. Although it depends on the shape of the metal powder, it is 25 to 150% by weight, preferably 5 to 100% by weight in the resin coating layer. If the amount of the metal powder contained in the resin coating layer is less than 25% by weight, it is difficult for the resin coating layer to exhibit a sufficient function as an electrode. Adhesion with the surface may be reduced, and the wear resistance of the resin coating layer may be reduced.

  The resin that constitutes the resin coating layer takes into account the mechanical properties such as adhesion to the components and composition of the insole surface, the abrasion resistance of the resin coating layer itself, and the sensory characteristics such as the feel to the foot. It can be selected arbitrarily. For example, the insole shown in FIG. 1 is known. In FIG. 1, 10 is a cloth, 11 is a wet foam layer, 12 is an adhesive layer, 13 is a skin layer, and a resin coating layer 14 containing metal A is formed on the surface of this insole, and metal A A resin coating layer 15 containing metal B having a different ionization tendency is formed.

  The resin constituting the resin coating layer is preferably substantially the same or the same homogeneous component in terms of adhesion to the insole surface (skin layer 13). For example, when the skin layer 13 is a urethane-based component, the resin constituting the resin coating layer is preferably a urethane-based component. Examples of urethane-based components include: Crisbon NY329 (silicone copolymer polycarbonate urethane manufactured by Dainippon Ink & Chemicals, Inc.), REZALOID Lu4003 (polycarbonate urethane manufactured by DAINISEI KOGYO CO., LTD.), REZALOID Lu4164 (polycarbonate urethane) Dainichi Seika Kogyo Co., Ltd.), Rezaroid Lu305SP (polycarbonate-based urethane Dainichi Seika Kogyo Co., Ltd.) and the like.

  In these urethane components, a metal powder is contained in these components, and a coating solution for a resin coating layer is prepared using a solvent (MEK, DMF, toluene, IPA, cyclohexane, etc.) as appropriate. The liquid can be applied to the insole and an electrode with a resin coating layer can be formed in 1 to 5 minutes at 100 to 130 ° C. Therefore, even when the insole is a synthetic leather, the resin coating is not damaged. It is possible to form an electrode with a layer, and when a silicone copolymer polycarbonate urethane such as Crisbon NY329 is used, it has excellent hydrolysis resistance and wear resistance, and therefore exhibits a long-term energization effect. Can do.

  The resin coating layer containing the first metal powder and the resin coating layer containing the second metal powder having a different ionization tendency from the metal are formed at predetermined intervals. As a method for forming such a resin coating layer, a resin coating layer containing a first metal powder is printed in a first pattern, and the resin coating layer containing a second metal powder is formed in a blank area of the first pattern. It is preferable to print with the second pattern so as to be formed.

  FIG. 2 shows the appearance of a shoe insole in which a resin coating layer containing a first metal powder and a resin coating layer containing a second metal powder are formed by the above printing method. 2, 201, 202, 203... Are patterns of the resin coating layer containing the first metal powder, and 221, 222, 223... Are the patterns of the resin coating layer containing the second metal powder. By forming such a pattern, design properties can be imparted to the insole surface. In addition, the resin coating layer containing the first metal powder and the resin coating layer containing the second metal powder contain metallic powders of different colors, or contain pigments of different colors. Designability can be improved.

  FIG. 3 is a schematic view for illustrating the operation of the insole for shoes of the present invention. In FIG. 3, only two resin coating layers are shown in an enlarged manner for easy illustration of the resin coating layers formed in large numbers. In FIG. 3, 30 is a base fabric constituting the insole, 31 is a urethane layer constituting the insole, 32 is a resin coating layer containing metal A formed by printing or the like on the surface of the urethane layer, and 33 is the surface of the urethane layer. The resin coating layer containing the metal B formed by printing or the like, and the metal A and the metal B have different ionization tendency.

  When the insole for shoes is laid in the shoe and the shoe is worn, when sweat 35 comes out from the foot 34, a potential difference is generated between the metal A and the metal B using the sweat 35 as an electrolyte. A weak current flows on the body surface. This weak current causes a redox reaction between the electrolytes. By this oxidation reaction, fatty acids and the like that cause odors are decomposed, and bacteria are also sterilized by oxidation. These effects will last forever if the electrode is present, and will exhibit antibacterial and deodorizing effects over the long term.

As described above, antibacterial and deodorizing effects are demonstrated over a long period of time by an extremely simple method of including a metal powder in the resin coating layer composition and applying the composition to the insole surface by printing or the like. Can be manufactured.
Hereinafter, although an example is described, the present invention is not limited to this example.

Hereinafter, “parts” means “parts by weight” unless otherwise noted.
<Coating liquid formulation A for resin coating layer>
-Crisbon NY329 (resin content 20%, solvent content 80%) 100 parts-Metal powder (silver: scale metal) 16 parts-MEK 10 parts

<Coating solution formulation B for resin coating layer>
-Crisbon NY329 100 parts-Metal powder (zinc: scaly metal) 16 parts-MEK 10 parts

Example 1
The coating liquid formulation A was printed on the surface of the insole shown in FIG. 1 using a screen (80 lines). Thereafter, the electrode pattern A was obtained by drying at 120 ° C. for 3 minutes.
Also, the coating liquid formulation B was printed on the surface of the insole shown in FIG. 1 using a screen (80 lines). Thereafter, the electrode pattern B was obtained by drying at 120 ° C. for 3 minutes.
Shoe insoles having these electrode patterns were obtained.

Comparative Example 1
A commercial product was used in which a synthetic nonwoven fabric impregnated with an aliphatic amine-based agent as an antibacterial agent was bonded to the substrate with an adhesive, using an SBR rubber added with activated carbon or a zeolite-based inorganic substance as a deodorant.
Comparative Example 2
Insole used in Example 1 (no resin coating layer containing metal powder is formed)

  About Example 1, Comparative Example 1 and Comparative Example 2 above, 1) Deodorization test was conducted, and for Example 1 and Comparative Example 2 above, 2) Antibacterial test in Escherichia coli, 3) Mold resistance test Carried out.

《Deodorization test》
1) Ammonia water is dropped into shoes so that the ammonia concentration becomes 500 ppm, and the shoes are put on.
2) Thereafter, the ammonia concentration in the shoe is measured using a detection tube at regular intervals.

<Antimicrobial test with E. coli>
JIS L 1902 compliant << Fung resistance test >>
Conforms to JIS Z 2911

The results of the deodorant test are shown in Table 1.

* New (unused)
* 2 months later (2 months after use)

  From Table 1, the insole for shoe of Example 1 of the present invention has little functional deterioration after 2 months, but the insole for shoe of Comparative Example 1 (commercial product) has the same function as Comparative Example 2 after 2 months. It has dropped to the level.

  The results of the antibacterial test using E. coli are shown in FIGS. From FIG. 4, the insole for shoes according to Example 1 of the present invention has halos (portions where bacteria do not approach) in the region where the electrodes are formed. On the floor, there is no halo (the part where bacteria do not come close).

  The results of the mold resistance test are shown in FIGS. From FIG. 6, the insole for shoes of Example 1 of the present invention shows no growth of ringworms in the region where the electrodes are formed, but in the insole of Comparative Example 2 in FIG. There is some breeding.

Next, tests such as mechanical properties were performed on the insole of Example 1 of the present invention and the insole of Comparative Example 2. The test results are shown in Table 2.

* 1: Gakushin type fastness tester No. 6 is used.
500gf x 1000 times
Does not wear: ○
Wear out ： ×

  From Table 2, the insole for shoes of Example 1 of the present invention shows physical properties equivalent to or higher than those of Comparative Example 2 in which the surface of the insole is not treated with the resin coating layer containing metal. Therefore, it can be seen that the formation of the resin coating layer can impart an antibacterial function, a deodorizing function, and the like without impairing the mechanical properties of the insole for shoes.

It is a principal part perspective view which shows one Embodiment of the insole for shoes of this invention. It is a general-view figure which shows one Embodiment of the insole for shoes of this invention. It is a schematic diagram for demonstrating the effect | action of the insole for shoes of this invention. 2 is a photograph showing the results of an antibacterial test on Escherichia coli in Example 1. It is a photograph which shows the result of an antimicrobial test with colon_bacillus | E._coli in the comparative example 2. 2 is a photograph showing the results of a mold resistance test in Example 1. FIG. 3 is a photograph showing the results of a mold resistance test in Example 2. FIG.

Explanation of symbols

10 Fabric 11 Wet Foam Layer 12 Adhesive Layer 13 Skin Layer 14 Resin Film Layer (Metal A)
15 Resin coating layer (Metal B)
30 base fabric
31 Urethane layer 32 Resin coating layer (Metal A)
33 Resin coating layer (Metal B)
34 feet 35 sweat 201, 202, 203 .. resin film layer pattern 221, 222, 223 .. resin film layer pattern

Claims (5)

  An insole for shoes, wherein a resin coating layer containing a first metal powder and a resin coating layer containing a second metal powder having a different ionization tendency from the metal are formed on the insole surface.   The resin coating layer containing the first metal powder and the resin coating layer containing the second metal powder having a different ionization tendency from the metal are each printed in a pattern on the insole surface. The insole for shoes according to 1.   The insole for shoes according to claim 1 or 2, wherein each of the first metal powder and the second metal powder has a scale shape.   The first metal powder and the second metal powder are each selected from the group consisting of platinum, gold, silver, titanium, zinc, copper, aluminum, tin, and iron. The insole for shoes of any one of Claims.   The insole for shoes according to claim 4, wherein the first metal powder is flaky zinc and the second metal powder is flaky silver.