JP2006006571A - Shoe sole - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a shoe sole with improved wet-grip. <P>SOLUTION: The grounding face of the shoe sole is made of a mixed composition including a titanium oxide member with apatite crystals with a rubber material or a thermoplastic resin or thermosetting resin, or the mixture thereof, or the foaming material thereof as the base material. It is preferable that the outsole, studs, and projections, etc., formed in the intermediate layer exposed to the grounding face through a through hole in the lower layer in a three-layer structure of the grounding face should be made of the mixed composition including a titanium oxide member with apatite crystals. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a shoe sole, and any one or more of parts constituting a ground contact surface is formed of a mixed composition containing a titanium oxide member with an apatite crystal, thereby improving wet grip properties. It is an improvement.

  Conventionally, as disclosed in JP-A-6-113902, it is common to blend titanium oxide into a base material constituting a shoe sole, and titanium oxide is mainly used as a material for coloring rubber white. It was used.

By the way, titanium oxide has a problem of decomposing the blended base material itself due to its excellent resolution. Therefore, conventionally, when titanium oxide is blended in the base material of the shoe sole, it is blended in the base material after some kind of coating processing is performed in order to deactivate the resolution.
JP-A-6-113902

  In addition, as disclosed in JP-A-1-119202, some shoes are made of a material containing titanium oxide in the tissue.

In this case, titanium oxide is used for the purpose of antibacterial deodorization and the like, and is not intended to improve wet grip properties, and has not been arranged on the ground plane. In the first place, compounding titanium oxide with a base material focusing on grip properties has never been performed.
JP-A-1-119202

  The problem to be solved by the present invention is to improve wet grip performance in a shoe sole.

  In order to achieve the above-mentioned object, the present invention is a shoe sole, wherein any one or more of the parts constituting the ground plane is composed of a mixed composition containing a titanium oxide member with an apatite crystal. It relates to the characteristic shoe sole.

  The invention according to claim 2 is the mixed composition according to claim 1, wherein the mixed composition contains 5 parts by weight or more of a titanium oxide member having the apatite crystals added to 100 parts by weight of the base material. It is related with the shoe sole characterized by being.

  The invention according to claim 3 is the invention according to any one of claims 1 to 2, wherein the base material of the mixed composition is a rubber material, a thermoplastic resin, a thermosetting resin, a mixture thereof, or a foam thereof. The present invention relates to a shoe sole characterized by being a body.

  The invention described in claim 4 relates to a shoe sole, which is a shoe sole, wherein the outsole is made of the mixed composition according to any one of claims 1 to 3.

  The invention according to claim 5 relates to a shoe sole, wherein the stud is made of the mixed composition according to any one of claims 1 to 3.

The invention according to claim 6 is a shoe sole,
The upper layer, the middle layer, and the lower layer are composed of three layers, the upper layer and the lower layer are formed of a soft elastic member, and the middle layer is sandwiched between the upper layer and the lower layer and has a hardness higher than that of the upper layer and the lower layer. Is composed of a sheet made of natural rubber, synthetic rubber or synthetic resin, and the middle layer has a plurality of protrusions protruding toward the ground surface, and the lower layer has a plurality of through holes extending in the vertical direction. A shoe sole including a laminate in which the protrusion of the middle layer is inserted into the through-hole and the upper layer, the middle layer, and the lower layer are integrated;
The shoe has a mixed composition according to any one of claims 1 to 3, and relates to a shoe sole.

  The present invention can improve wet grip properties in a shoe sole.

  FIG. 1 is a schematic view of a shoe 1 according to the present invention as viewed from the outer side. In addition, the hatched portion in the drawings in this specification indicates that the portion is composed of a mixed composition containing a titanium oxide member with an apatite crystal.

  As shown in FIG. 1, the ground contact surface 5 is preferably composed of a mixed composition containing a titanium oxide member with an apatite crystal.

The titanium oxide member provided with apatite crystals is obtained by dispersing apatite on the surface of titanium oxide and crystallizing it into a film.
Titanium oxide has super hydrophilicity, and when irradiated with ultraviolet rays, water does not form water droplets on the surface of the mixed composition containing titanium oxide, but almost completely diffuses and the water is well adapted to the surface. A phenomenon (photohydrophilic reaction) occurs. Therefore, since the ground contact surface 5 of the shoe 1 is made of a mixed composition containing titanium oxide, the ground contact surface 5 can be made super hydrophilic, so that it can be used on a wet road surface or a gymnasium floor. Even when shoes are used, the wet grip property is remarkably improved because a water film that causes slippage does not occur on the surface of the ground contact surface 5.
On the other hand, since titanium oxide has an excellent resolution, when only titanium oxide is blended in the base material, there is a problem that the base material itself is decomposed. Therefore, conventionally, in order to inactivate the resolution of titanium oxide, titanium oxide is coated with some material and then blended into the base material. In this case, although titanium oxide does not decompose the base material, titanium oxide is not exposed on the surface, so that super hydrophilicity, that is, wet grip property cannot be expected.

  In the present invention, the ground contact surface 5 of the shoe sole is composed of a mixed composition containing a titanium oxide member provided with apatite crystals. That is, since the apatite crystal is attached to the titanium oxide, the contact area of the titanium oxide to the base material is reduced, so the base material itself is less likely to be decomposed, and the titanium oxide is partially exposed. The super hydrophilic property of titanium oxide, that is, wet grip performance can be exhibited. Further, by using a hydrophilic material as the apatite crystal, super hydrophilicity, that is, wet grip property can be further improved.

Graph 1 shown in FIG. 2 shows a result of performing a wet grip test by creating a shoe sole from a mixed composition in which a synthetic rubber is mixed with a titanium oxide member with an apatite crystal.
Moreover, Table 1 shown in FIG. 3 is a score list when the wet grip test is performed.

The method of the wet grip test is as follows.
First, a synthetic rubber was prepared by blending titanium oxide members with apatite crystals with 0 phr, 1 phr, 2 phr, 3 phr, 4 phr, 5 phr, 10 phr, and 30 phr, and 87.0 foot shoes soles were prepared. Next, 8 pairs of 27.0 cm shoes were prepared from each shoe sole.
The table shown in FIG. 3 shows the slipping state felt when two subjects weighing 70 kg walked 10 steps at 5 km / h on a vinyl chloride tile with their shoes worn on the entire surface. The score was selected from 7 levels. At that time, the titanium oxide member with apatite crystal is not blended, that is, the sliding state when wearing 0 phr shoes is 4 points, and the sliding condition compared with wearing 0 phr shoes is based on Table 1. Scoring.
Graph 1 shows the average of the scores scored at the time when the above is performed twice for each person.

As shown in Graph 1, a shoe sole made of a synthetic rubber in which a titanium oxide member with an apatite crystal added to a synthetic rubber as a base material has a wet grip property greatly improved by adding about 5 phr.
From this, it is understood that wet grip properties can be greatly improved by adding about 5 phr by adding a titanium oxide member with apatite crystals to the base material.
Therefore, it is preferable to mix 5 parts by weight or more of the titanium oxide member provided with the apatite crystal with respect to 100 parts by weight of the base material.
Moreover, it turns out that the effect becomes high, so that there is much quantity which adds the titanium oxide member which attached | subjected the apatite crystal | crystallization.
Therefore, it turns out that wet grip property improves by comprising the ground contact surface 5 of shoes sole with the mixed composition in which the titanium oxide member which attached | subjected the apatite crystal | crystallization was contained.

  The base material of the mixed composition is preferably a rubber material such as natural rubber or synthetic rubber, a thermoplastic resin or a thermosetting resin, or a foamed product thereof.

As the rubber material, a material which is relatively inexpensive and excellent in workability, wear resistance and gripping property is preferable. Specifically, BR, SBR, NBR, CR, IIR, IR, NR, and mixtures thereof are suitable.
The thermoplastic resin is not particularly limited as long as it can be molded by injection molding, and examples thereof include urethane resins, styrene resins, olefin resins, polyester resins, polyamide resins, and ionomer resins.
Specifically, styrenic resins when emphasizing processability and flexibility, olefinic resins when emphasizing processability and price, urethane resins and polyester resins when emphasizing wear resistance, and light weight A polyamide-based resin or the like is suitable when importance is attached to rigidity.
As the thermosetting resin, polyurethane resin, epoxy resin, unsaturated polyester resin, urea resin and the like are suitable.
As the foam, a foam such as rubber or EVA is preferable.

  A method of adding a titanium oxide member having an apatite crystal attached to the substrate is as follows.

When adding a titanium oxide member with apatite crystals to natural rubber and synthetic rubber, the following procedure is used.
First, at the stage of kneading natural rubber and synthetic rubber before vulcanization, a titanium oxide member provided with apatite crystals, and natural rubber and synthetic rubber are kneaded by a kneader. Although the kneading temperature and the kneading time vary depending on the rubber material, for example, in the case of SBR and BR, the titanium oxide member to which all apatite crystals are attached is dispersed in the unvulcanized rubber in about 40 to 50 ° C. for about 50 minutes. Then, the kneaded unvulcanized rubber is put into a mold and molded under the same conditions as normal rubber heat compression molding conditions. For example, in the case of SBR and BR, it is about 160 ° C. and about 10 minutes.

When adding the titanium oxide member which attached the apatite crystal to the thermoplastic resin, it carries out in the following procedures.
First, a titanium oxide member with an apatite crystal added to a thermoplastic resin substrate is quantitatively added by a biaxial kneader to produce a pellet in which the titanium oxide member with an apatite crystal is uniformly added.
The produced pellets are put into an injection molding machine and injection molded under the same conditions as normal resin injection conditions. For example, in the case of a urethane-based resin, the molding is performed at about 180 ° C to 220 ° C.

When adding a titanium oxide member with an apatite crystal added to a thermosetting resin, the following procedure is used.
First, a quantitative addition of a titanium oxide member with apatite crystals attached to a resin base before curing, and stirring. Further, after adding a curing agent, it is cured by heating. For example, in the case of an epoxy resin, it is molded at 130 ° C. for about 30 minutes.

As a method of adding a titanium oxide member with apatite crystals added to the foam, the following procedure is used.
A titanium oxide member provided with apatite crystals in advance is added to the main material pellets. Next, the pellets are kneaded with various additive chemicals and fillers to knead the foaming material. The produced foaming material is filled into a foaming mold, and the mold is heated and compressed to produce a primary foam. Next, this primary foam is cut into a midsole shape, then placed in a mold, and the mold is finished by heating and compression and then cooling.

FIG. 4 is a view of the shoe sole 3 in the embodiment of the present invention as seen from the ground contact surface side.
As shown in FIG. 4, as the ground contact surface 5, the outsole 6 may be composed of a mixed composition containing a titanium oxide member with an apatite crystal.
In addition, the mixed composition containing the titanium oxide member with the apatite crystal may be used for the entire outsole 6, but the part where particularly wet grip properties are required, such as the heel part, the toe part, and the thumb ball part. It may be used only for

FIG. 5 is a view of the shoe 1 according to the second embodiment of the present invention as seen from the outer side.
As shown in FIG. 5, a titanium oxide member with apatite crystal is included in a winding portion 61 formed in a shape covering at least the midsole 4 and / or the side surface of the upper 2 continuously from the outsole 6. You may comprise from the mixed composition which is.

FIG. 6 is a view of the shoe sole 3 according to the third embodiment of the present invention as seen from the grounding surface side.
As shown in FIG. 6, the stud 62 formed in a convex shape on the outsole 6 may be composed of a mixed composition containing a titanium oxide member provided with apatite crystals. The stud 62 may be fixed integrally with the shoe sole 3 or may be removable as a separate body.

FIG. 7 is a cross-sectional view of a shoe sole 3 according to the fourth embodiment of the present invention as viewed from the grounding surface side.
As shown in FIG. 7, the shoe sole 3 is composed of three layers of an upper layer 71, a middle layer 72, and a lower layer 73. The upper layer 71 and the lower layer 73 are formed of a soft elastic member, and the middle layer 72 is composed of the upper layer 71 and the lower layer 73. It is composed of a synthetic rubber or synthetic resin sheet sandwiched between and having higher hardness than the upper layer 71 and the lower layer 73, and the middle layer 72 has a plurality of protrusions 74 projecting to the grounding surface side, and the lower layer 73. Has a plurality of through holes 75 extending in the vertical direction, and includes a laminate in which the protrusions of the intermediate layer 72 are fitted into the through holes 75 and the upper layer 71, the intermediate layer 72, and the lower layer 73 are integrated. . Although not shown, a synthetic rubber layer or the like may be provided under the lower layer 73 of the laminate.
In the shoe sole 3 shown in the present embodiment, the protrusion 74 may be composed of a mixed composition containing a titanium oxide member with an apatite crystal.

  In any case, wet grip properties can be improved by forming each part constituting the ground contact surface 5 from a mixed composition containing a titanium oxide member provided with apatite crystals.

Further, when the ground plane 5 is composed of a mixed composition containing a titanium oxide member with an apatite crystal, the entire ground plane 5 is composed of a mixed composition containing a titanium oxide member with an apatite crystal. Alternatively, only the necessary parts may be partially composed of a mixed composition containing a titanium oxide member provided with apatite crystals.
When partially used, a certain region may be composed of a mixed composition containing a titanium oxide member with an apatite crystal, or only a surface to be grounded includes a titanium oxide member with an apatite crystal. You may comprise from the mixed composition currently prepared.
In this case, the amount of the titanium oxide member provided with the apatite crystal is small, and an inexpensive and functional shoe sole can be obtained.

  As examples of use of the present invention, sports shoes for competitions such as running, tennis, baseball, basketball, soccer, golf, table tennis, and general shoes such as walking shoes, men's shoes, and women's shoes are conceivable.

It is the schematic diagram which looked at the shoes 1 in the present invention from the outer side. The result shows that a shoe sole is made from a mixed composition in which a titanium oxide member with an apatite crystal is added to a synthetic rubber and a wet grip test is performed. It is a score list when the wet grip test is performed. It is the figure which looked at the shoe sole 3 in the embodiment of this invention from the ground-contact side. It is the figure which looked at the shoe sole 3 in the 2nd embodiment of this invention from the outer side. It is the figure which looked at the shoe sole 3 in the 3rd embodiment of this invention from the ground-contact side. It is what looked at the shoe sole 3 in the 4th embodiment of this invention from the ground-contacting surface side, and its sectional drawing.

Explanation of symbols

1: Shoes 2: Upper 3: Shoes sole 4: Midsole 5: Ground surface 6: Outsole 61: Winding 62: Stud 71: Upper layer 72: Middle layer 73: Lower layer 74: Protrusion 75: Through hole

Claims (6)

A shoe sole, wherein any one or more of the parts constituting the contact surface is made of a mixed composition containing a titanium oxide member with an apatite crystal. The shoe sole according to claim 1, wherein the mixed composition is a mixed composition in which 5 parts by weight or more of a titanium oxide member having the apatite crystal added thereto is blended with 100 parts by weight of a base material. 3. The shoe sole according to claim 1, wherein the base material of the mixed composition is a rubber material, a thermoplastic resin, a thermosetting resin, a mixture thereof, or a foam thereof. A shoe sole comprising a mixed composition according to claim 1, wherein the outsole is a shoe sole. A shoe sole comprising a mixed composition according to any one of claims 1 to 3, wherein the stud is a shoe sole. Shoes sole,
The upper layer, the middle layer, and the lower layer are composed of three layers, the upper layer and the lower layer are formed of a soft elastic member, and the middle layer is sandwiched between the upper layer and the lower layer and has a hardness higher than the upper layer and the lower layer. Is composed of a sheet made of natural rubber, synthetic rubber or synthetic resin, and the middle layer has a plurality of protrusions protruding toward the ground surface, and the lower layer has a plurality of through holes extending in the vertical direction. A shoe sole including a laminate in which the protrusion of the middle layer is inserted into the through-hole and the upper layer, the middle layer, and the lower layer are integrated;
A shoe sole, wherein the protrusion is made of the mixed composition according to any one of claims 1 to 3.

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