JP2003289902A - Outsole and sole using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a light-weight outsole and a sole using the outsole. <P>SOLUTION: In the outsole 1 consisting of grounding parts 2, a design part 3, and a base part 4, the grounding parts 2 and the design part 3 are made of rubber 4a, the rubber 4a is arranged on the side of the grounding part 4A of the base part 4; and thermoplastic resin 4b or thermoplastic elastomer 4b is arranged on a bonding surface side 4B. Both of these 4a and 4b are melted and integrated to have a joined structure. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an outsole and a shoe sole using the outsole, and more specifically, it is formed of a thermoplastic resin or a thermoplastic elastomer and a rubber, or a thermoplastic resin or a thermoplastic elastomer. The present invention relates to a shoe sole having a structure in which a thermoplastic resin or a thermoplastic elastomer and a rubber are melt-integrated and joined to each other, which is composed of a base portion and a grounding portion or a design portion made of rubber. The purpose is to reduce the weight of shoe soles, improve adhesive strength, stabilize quality, improve appearance, reduce costs, and improve functionality.

[0002]

2. Description of the Related Art Various materials are known as materials for molding shoe soles. For example, in Japanese Patent Application Laid-Open No. 8-294933, after halogenating the surface of rubber, thermoplastic resin such as polyurethane elastomer or polyamide elastomer is multicolor molded by compression molding or injection molding on the surface of the halogenated rubber. A method of manufacturing a sports shoe sole is disclosed.

Japanese Patent Laid-Open No. 7-195622 discloses a thermoplastic elastomer (TPV) obtained by dynamically vulcanizing a rubber dispersed in a thermoplastic matrix in the form of fine particles.
Discloses an invention relating to a composite product in which a thermoplastic material is adhered, that is, an article comprising a thermoplastic and TPV. Furthermore, as a shoe made by insert molding or two-color injection molding, TP is put on the sole (sole) made of polyetheresteramide, which has high fatigue resistance, low deformation hysteresis, and excellent low temperature characteristics.
Molding of shoe soles by insert molding injecting a V alloy (thermoplastic / rubber alloy) is disclosed.

In Japanese Patent Publication No. 8-505333, light weight is adhered on a dense material made of non-lightweight thermoplastic selected from the group consisting of polyetheramide, polyetherester and polyurethane. A shoe sole is disclosed that comprises a two-layer article of a composition that includes a compounded thermoplastic elastomer.

In Japanese Patent Publication No. 8-511741, a vulcanized elastomer containing a carboxylic acid group is combined with a thermoplastic polymer containing a block to obtain a composite structure, and the elastomer is vulcanized on the thermoplastic polymer. A method of manufacturing the sole of an athletic shoe is disclosed.

Further, it is similar to that disclosed in Japanese Patent Application Laid-Open No. 8-294933, and the surface of the vulcanized rubber is subjected to pretreatment such as primer or halogenation and then inserted into an injection mold. The sole of sports shoes made by injection molding the material of the sole body has already been commercialized.

Further, in Japanese Patent Laid-Open No. 2000-41702, after a rubber formed of a thermosetting elastic body and an adhesive layer formed of a thermoplastic elastomer are simultaneously integrally formed,
A shoe sole having a three-layer structure integrally molded with an adhesive layer by injection molding a base that is a shoe sole body formed of a thermoplastic elastomer, and a method of manufacturing the shoe sole having the three-layer structure are disclosed. There is. As described above, the inventions relating to various soles have been already known, but there has been a demand for improvement of a rubber outsole which is inexpensive and has a large market share. That is, as a conventionally known structure of a rubber outsole, as shown in the figure, it is generally composed of a base part which is a base and a design part which is grounded. These rubber outsole tend inevitably weight because the specific gravity is large is heavy, therefore is a effective means to reduce the thickness as a means to reduce weight, grip resistance and is required properties required as the shoe In order to reduce the thickness without impairing the wear resistance, a method of thinning the base portion has been generally used.

[0008]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention
In the method disclosed in Japanese Patent No. 94933, the surface of the vulcanized rubber requires a secondary surface activation treatment such as a pretreatment such as a primer or halogenation, which makes the number of steps complicated. Further, in this manufacturing method, when a thermoplastic such as a polyurethane elastomer or a polyamide elastomer is injection-molded, the vulcanized rubber is deformed by the injection pressure, and the thermoplastic wraps around the design surface portion of the rubber portion to cause a poor appearance. It may be a cause.

Therefore, in order to prevent this defect, the rubber hardness is set in the range of 75 to 85 A by the shore to increase the hardness of the rubber portion, and the wall thickness of the rubber portion is increased to correspond to the injection pressure. Had to let. Therefore, as a shoe sole material, the rigidity is too high and it is too hard, and only an unsuitable sole can be provided.

As disclosed in JP-A-8-505333, on a dense material composed of a non-lightweight thermoplastic selected from the group consisting of polyetheramides, polyetheresters, polyurethanes. In a shoe sole composed of a two-layer article made of a composition containing a lightweight thermoplastic elastomer, which is adhered to, the durability of the lightweight thermoplastic elastomer itself is low. It may decrease.

Japanese Patent Publication No. 8-511741 discloses a composite structure obtained by combining a vulcanized elastomer containing a carboxylic acid group and a thermoplastic polymer containing a block. Although a method of manufacturing a shoe sole of an athletic shoe in which an elastomer is vulcanized on a thermoplastic polymer is disclosed, a method of manufacturing the shoe sole is not described in detail. However, for example, when the press molding is adopted, there is a problem that a burr (coating) of rubber is formed on the thermoplastic polymer and the product cannot be commercialized from the appearance.

Further, in the above-described method for manufacturing a shoe sole, since the thermoplastic elastomer sheet is subjected to a molding temperature higher than the heat deformation temperature, the heat deformation and the deformation during cooling remain after the mold is removed. In order to prevent these, a cooling device is required for the outsole injection molding die, so it is necessary to install extremely expensive and complicated equipment, and there is a problem that it becomes expensive in terms of manufacturing cost. Was there. Therefore, there is a demand for a method of manufacturing a shoe sole or a shoe that has good durability, has appropriate hardness and flexibility as a material for a shoe sole, has cushioning properties and traction properties, and has good productivity and is inexpensive to produce. It was rare.

Further, in the shoe sole having the three-layer structure disclosed in Japanese Patent Laid-Open No. 2000-41702, since the adhesive layer is interposed between the rubber and the base, the adhesiveness between the rubber and the base is sufficiently improved. Moreover, although the variation in the adhesive force is greatly reduced, it has been desired to further improve the adhesiveness and reduce the variation in the adhesive force. Further, as a problem with the shoe sole having a three-layer structure, there is a disadvantage that the weight of the shoe sole becomes heavy, and it has been desired to reduce the weight. In addition, as shown in FIG. 5, a rubber outsole 10 having a large versatility as a shoe sole.
In general, in order to reduce the weight, the base portion is generally thinned. However, if the base portion of the rubber outsole 10 is made too thin, the rubber outsole 10 is sufficiently bonded to the midsole 15 or the upper. It had a problem that it could not be buffed for the purpose of obtaining power. That is,
Since the thickness of the base portion 14 is too thin, the base portion is deformed during buffing and a uniform buffed surface cannot be obtained, resulting in a large difference in adhesive strength. Further, if the buffing is forcibly done, the base portion will be damaged and the yield of the products will be reduced. Therefore, in order to buff the adhesive surface of the rubber outsole 10, the thickness of the base portion 14 must be at least 1.0 mm, and the specific gravity is about 1.15 to 1.2.
Since it was 5, it was an obstacle to reducing the weight of the rubber outsole 10. In addition, as shown in FIG. 6, the structure of the conventional rubber outsole 10 includes a base portion 14, which is a base,
Both the grounding portion 12 and the design portion 13 were made of a single material of rubber 14a. Since the rubber 14a has low hardness and low elasticity, it is excellent in gripping property and is an optimal material for the design portion. However, in the case of a base part made of a rubber material with low hardness and low elasticity, when a large force was applied to the sole, the base part locally deformed into a so-called bottomed state, and it was said that it was not possible to sufficiently cushion the impact. I had a problem. In addition, since the base portion 14 is made of a low-elasticity rubber 14a, the speed at which the base portion 14 returns to its original shape due to deformation due to a load is slow, and thus the resilience of the sole is poor. . In addition, in the conventional rubber outsole 10, the base portion 14 has a low hardness like the design portion 13,
It is made of a low elastic rubber single material, and when you step on sharp pebbles on the road surface with a thin base portion 14 when wearing shoes, the low strength rubber base portion is damaged and cracks occur. There was a possibility that it could cause injury due to the possibility of pushing it up to the sole of the foot.

The present invention overcomes the above-mentioned problems of the prior art, improves the adhesion between the outsole and the midsole and the upper, reduces the weight and stabilizes the quality, further improves the appearance, and reduces the cost. It is another object of the present invention to provide an outsole that is further achieved and has improved functionality, and a shoe sole that uses the outsole.

[0015]

A shoe sole according to the present invention is an outsole comprising a grounding portion, a design portion and a base portion as described in claim 1, wherein the grounding portion and the design portion are made of rubber. A rubber is disposed on the grounding side of the base portion, and a thermoplastic resin or a thermoplastic elastomer is disposed on the adhesive surface side, and both have a structure in which they are melt-integrated and joined. It is a sole.
In addition, the shoe sole according to the present invention, as described in claim 2,
In an outsole including a ground portion, a design portion, and a base portion, the ground portion and the design portion are made of rubber, the base portion is made of a thermoplastic resin or a thermoplastic elastomer, and the base portion is made of a rubber ground portion or An outsole having a structure in which the design part is melted and integrated to be joined. Further, the shoe sole according to the present invention is claim 3.
The base portion of the outsole is 0.1.
Rubber with a thickness of 0.5 mm or more and 0.5 mm or less, 0.1 mm
The outsole is characterized in that the thermoplastic resin or the thermoplastic elastomer having a thickness of 1.0 mm or less is integrally joined.

Further, in the shoe sole according to the present invention, as described in claim 4, the base portion of the outsole is 0.1 mm.
An outsole made of a thermoplastic resin or a thermoplastic elastomer having a thickness of 1.0 mm or less. Further, in the shoe sole according to the present invention, as described in claim 5, the outsole is configured such that the base portion of the outsole has a three-dimensional corrugated three-dimensional curved surface shape. Is. In addition, the shoe sole according to the present invention, as described in claim 6, is any one of claims 1 to 5.
The outsole described in the item is used, and the outsole is
A shoe sole characterized by being integrally bonded to a midsole made of a material such as an olefin sponge such as VA or PE or a polyurethane sponge.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION An outsole according to the present invention is an outsole comprising a ground portion, a design portion and a base portion, wherein the ground portion and the design portion are made of rubber, and a rubber portion is provided on the ground portion side of the base portion. And a thermoplastic resin or a thermoplastic elastomer is disposed on the adhesive surface side, and both have a structure in which they are melt-integrated and joined. The shoe sole according to the present invention is an outsole including a ground portion, a design portion, and a base portion, and the ground portion and the design portion are made of rubber, and the base portion is made of a thermoplastic resin or a thermoplastic elastomer. The base portion is an outsole having a structure in which the base portion is fused and integrally joined to the grounding portion or the design portion of the rubber.

In the present invention, a rubber material obtained by mixing and kneading the main raw material of the rubber, a plasticizing compounding agent, an antiaging agent, a filler and the like is filled and arranged in the concave portion forming the grounding portion and the design portion of the mold, The surface of the rubber is pre-crosslinked with a sheet-shaped or film-shaped thermoplastic resin or a material such as a thermoplastic elastomer after pre-forming the base part at the same time as tightening, heating and pressurizing to pre-crosslink the ground part and the design part. The rubber that constitutes the grounding surface side of the base portion and the thermoplastic resin or thermoplastic elastomer material that constitutes the adhesive surface side of the base portion are melt-integrated by being laminated and installed in a press molding die. It constitutes the outsole. When a thermoplastic resin or thermoplastic elastomer having a specific gravity smaller than that of rubber is used, the weight can be reduced.

In the same manner, in the present invention, the rubber material obtained by mixing and kneading the main material of the rubber, the plasticizing compounding agent, the antiaging agent, the filler, etc. is filled in the concave portion forming the grounding portion and the design portion of the mold. After arranging, mold clamping, heating and pressurizing and pre-crosslinking to pre-form only the grounding part and the design part, then a sheet-like or film-like thermoplastic resin or a material such as a thermoplastic elastomer is pre-cross-linked. Laminated on the surface,
It is also possible to form the outsole by melting and integrating the rubber constituting the grounding portion or the design portion and the thermoplastic resin or the thermoplastic elastomer material constituting the base portion by heating and pressing in the press molding die. is there.

A shoe characterized in that the outsole according to the present invention is used, and the outsole is joined and integrated with a midsole made of a material such as olefin sponge such as EVA or PE or polyurethane sponge. The bottom can be supplied. The outsole having a three-dimensional three-dimensional curved surface in the base part is formed by pressing the concave part forming the grounding part and the design part with the mold and the joining surface of the upper and lower molds corresponding to the base part into a three-dimensional three-dimensional curved surface shape. It can be manufactured by heating and pressing in a molding die.

As the thermoplastic resin constituting the base portion, polyamide resin, polyurethane resin, polyolefin resin, polystyrene resin, polyvinyl chloride resin, polyester resin, chlorinated polyethylene resin, etc. can be used. As the thermoplastic elastomer, polyamide elastomer, polyurethane elastomer, polyolefin elastomer, EVA elastomer, polystyrene elastomer, polyvinyl chloride elastomer, polyester elastomer, chlorinated polyethylene elastomer, 1,2-polybutadiene elastomer, etc. are used. It is possible to

As an example of the thermoplastic elastomer that can be used for the base portion of the present invention, polyamide elastomers include PEBAX and Daice manufactured by ATOFINA.
L-Huels VESTAMID or the like can be used. Polyurethane elastomers include polyester type and polyether type, BASF ELASTOLLAN, DIC Bayer Pol.
For example, DESMOPAN manufactured by Ymer Inc. can be used, and as the polyolefin elastomer, MLASTOMER manufactured by Mitsui Petrochemical Co., Ltd., Modibar manufactured by NOF CORPORATION, and the like can be used.

The grounding portion and the design portion are made of rubber. Examples of the rubber material include NBR (acrytonitrile-butadiene rubber), X-NBR (carboxylated acrytonitrile-butadiene rubber), SBR. (Styrene-butadiene rubber), X-SBR (carboxylated styrene-butadiene rubber), BR (butadiene rubber), IR (isoprene rubber), NR (natural rubber), E
VA, EPDM (ethylene-propylene-diene), E
U, AU, etc.

As the NBR, JSR N of JSR Co.,
Nippon Zeon's NIPOL, Goodyear's CH
EMIGUM or the like can be used. Also, X-
As NBR, JSR N64OH of JSR, NIPOL of Zeon Corporation, LACSER of Dainippon Ink and Chemicals, Inc.
Etc. can be used. Moreover, as SBR,
NIPOL manufactured by Zeon Corporation, JSR manufactured by JSR, or the like can be used.

[0025]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. That is, as shown in FIGS. 1 and 2, in an outsole 1 including a ground portion 2, a design portion 3 and a base portion 4, the grounding is performed. The portion 2 and the design portion 3 are made of rubber 4a, the rubber 4a is arranged on the grounding portion 4A side of the base portion 4, and the thermoplastic resin 4b or the thermoplastic elastomer 4b is arranged on the adhesive surface side 4B. An outsole 1 is characterized in that it has a structure in which it is melted and integrated and joined. The rubber 4a having a thickness of 0.1 mm or more and 0.5 mm or less is provided on the grounding portion side 4A of the base portion 4 of the outsole 1, and the bonding surface side 4B is 0.1 mm or more and 1.0 mm or more.
The outsole 1 is characterized in that a thermoplastic resin 4b or a thermoplastic elastomer 4b having a size of less than or equal to mm is arranged, and these both 4a and 4b have a structure in which they are melt-integrated and joined.

If the thickness of the thermoplastic resin or the thermoplastic elastomer is 0.1 mm or less, the moldability is poor and the rigidity of the base portion is insufficient, resulting in a high defect rate during production. It was Further, the rubber 4a is arranged on the grounding portion 4A side of the base portion 4, but if the thickness of the rubber 4a is 0.1 mm or less, the moldability is poor and the defective rate at the time of production becomes high. Had. When the thickness of the rubber 4a is 0.5 mm or more, there is a problem that the weight becomes heavy in terms of weight reduction.

When the thickness of the thermoplastic resin or the thermoplastic elastomer is 1.0 mm or more, the weight becomes heavy in terms of weight reduction, and the rigidity of the base portion is too strong, so that it is joined to the midsole in a later process. It had a problem that it was difficult to integrate. In addition, the finished shoe sole itself has high rigidity, so that it has an improvement point that flexibility is hindered.

As another embodiment of the present invention, as shown in FIG. 3, in an outsole 1 including a ground portion 2, a design portion 3 and a base portion 4, the ground portion 2 and the design portion 3 are made of rubber 4a. The base portion 4 is made of the thermoplastic resin 4
It is also possible to use an outsole 1 which is made of thermoplastic elastomer 4b and has a structure in which the base portion 4 is fused and integrated with the ground portion 2 to the design portion 3 of the rubber 4a. The outsole shown in FIG. 3 is the midsole 5
The form of the shoe sole 6 joined and integrated with is shown. Since the base portion 4 is formed of only the thermoplastic resin 4b or the thermoplastic elastomer 4b as described above, the rubber 4a does not intervene on the grounding portion side 4A of the base portion 4, so that the weight can be further reduced. is there. The base portion 4 of the outsole 1 is the outsole 1 made of a thermoplastic resin 4b or a thermoplastic elastomer 4b having a thickness of 0.1 mm or more and 1.0 mm or less.

If the thickness of the thermoplastic resin or the thermoplastic elastomer is 0.1 mm or less, the moldability is poor and the rigidity of the base portion is insufficient, resulting in a high defect rate during production. It was

When the thickness of the thermoplastic resin or the thermoplastic elastomer is 1.0 mm or more, the weight becomes heavy in terms of weight reduction, and the rigidity of the base portion is too strong, so that it is joined to the midsole in a later step. It had a problem that it was difficult to integrate. In addition, the finished shoe sole itself has high rigidity, so that it has an improvement point that flexibility is hindered. As another embodiment of the present invention, as shown in FIG. 4, the outsole 1 may be configured such that the base portion 4 of the outsole 1 has a three-dimensional corrugated three-dimensional curved surface shape. In addition, using the outsole 1 of the present invention,
It is possible to supply a sole having a structure in which the outsole 1 is joined and integrated with a midsole made of a material such as EVA, PE or the like olefin sponge or polyurethane sponge,
Like the outsole, it is lightweight and does not push up on your foot.
It is possible to provide a shoe sole having a high shock absorbing effect.

[0031]

In the outsole according to the present invention,
Since the rubber forming the ground portion and the design portion and the sheet-shaped or film-shaped thermoplastic resin or the thermoplastic elastomer forming the base portion are melt-integrated, a polyolefin-based sponge such as EVA forming the midsole is formed. At the time of joining, since the adhesive surface of the base portion is always formed of a thermoplastic resin or a thermoplastic elastomer, it is not necessary to perform buff polishing unlike the adhesive surface of conventional rubber,
Since the adhesive strength can be maintained only by performing the primer treatment, it is possible to reduce the labor of buffing and the amount of waste. Further, the thickness of the rubber or the thermoplastic resin or the thermoplastic elastomer of the base portion can be freely designed as long as the minimum molding thickness is 0.1 mm or more.
The weight of the outsole itself can be reduced. That is, in the outsole according to the present invention, the grounding portion and the design portion are formed of a rubber having a low hardness and a low elasticity which are excellent in gripping property, and a thermoplastic resin or a thermoplastic elastomer is provided on the adhesive surface side of the base portion with the midsole or the like. By arranging them, the adhesion performance can be improved by the primer treatment instead of the conventional buffing, so that the thickness of the base portion can be reduced and the weight can be reduced and the degree of freedom in design can be increased. Further, in the conventional rubber outsole, both the base portion that serves as the base and the design portion that contacts the ground are made of a single rubber material. Since rubber has low hardness and low elasticity, it has excellent grip properties and is the most suitable material for the design part. However, in the case of a base part made of a rubber material with low hardness and low elasticity, when a large force was applied to the sole, the base part locally deformed into a so-called bottomed state, and it was said that it was not possible to sufficiently cushion the impact. Although there was a problem, in the outsole of the present invention, the hardness of the adhesive surface side of the base portion is Shore A70.
~ Because it is composed of thermoplastic resin such as polyamide elastomer of Shore D63 or TPU or thermoplastic elastomer, the impact is dispersed laterally when a large force is applied to the sole, so compared to conventional rubber outsole Since it exhibits excellent impact relaxation performance, it has the effect of reducing the risk of injury when worn. In addition, in the conventional rubber outsole, the base part is a low elastic rubber material, so the speed at which it returns to its original state is slow against deformation due to load, so the resilience of the sole is inferior However, in the outsole of the present invention, the hardness of the adhesive surface side of the base portion is composed of a polyamide elastomer having a Shore A70 to Shore D63 or a thermoplastic resin such as TPU or a thermoplastic elastomer. Therefore, the speed at which it returns to its original shape due to deformation due to load is fast, and since it has superior resilience performance compared to conventional rubber outsoles, it is effective in reducing foot fatigue during wearing. . In addition, in the conventional rubber outsole, the base part is made of a single rubber material with low hardness and low elasticity, like the design part.
When stepping on sharp pebbles on the road surface with a thin base part while wearing shoes, the low-strength rubber base part may be damaged and crack, and injury due to pushing up on the sole of the foot may occur. However, in the outsole of the present invention, the hardness of the adhesive surface side of the base portion is composed of a polyamide elastomer having Shore A70 to Shore D63 or a thermoplastic resin such as TPU or a thermoplastic elastomer. Compared to conventional rubber outsole made of single rubber material, it has much higher strength, which may cause damage to the base part and cause cracks, and risk of injury due to thrusting to the sole of the foot. This has the effect that it can be reduced. Further, according to the present invention, since a complicated three-dimensional corrugated three-dimensional curved surface shape is formed in the base portion from a thermoplastic resin, a thermoplastic elastomer, a rubber, or the like, further excellent impact relaxation performance and excellent It also has the resilience performance and the effect of preventing the sole from being pushed up, and the cushioning property and the flexibility of the shoe sole are improved, so that the wearing comfort can be improved.

Further, since the adhesive surface side of the base portion is composed of a thermoplastic resin or a thermoplastic elastomer, the buffing of rubber, which is conventionally required for the laminating process, can be simplified as compared with the primer treatment 2, which is complicated. This eliminates the need for extra work and greatly simplifies the work process in the shoe sole manufacturing process, making it possible to reduce costs. When a thermoplastic resin or thermoplastic elastomer having a specific gravity smaller than that of rubber is used, it is possible to further reduce the weight.

[Brief description of drawings]

FIG. 1 is a sectional view showing an outsole according to the present invention.

FIG. 2 is a cross-sectional view showing an outsole-bonded shoe sole according to the present invention.

FIG. 3 is a cross-sectional view showing an outsole-bonded shoe sole according to the present invention. .

FIG. 4 is a cross-sectional view showing an outsole-joined shoe sole according to the present invention.

FIG. 5 is a sectional view showing a conventional rubber outsole.

FIG. 6 is a cross-sectional view showing a shoe sole to which a conventional rubber outsole is joined.

[Explanation of symbols]

1 outsole 2 ground 3 Design Department 4 base 4A Ground side 4a rubber 4B Adhesive side 4b Thermoplastic resin 4b thermoplastic elastomer 5 midsole 6 soles 10 rubber outsole 12 Ground 13 Design Department 14 Base 14a rubber 15 Midsole

Claims (6)

[Claims] 1. An outsole composed of a ground portion, a design portion and a base portion, wherein the ground portion and the design portion are made of rubber, the rubber is arranged on the ground portion side of the base portion, and the adhesive surface side is made of thermoplastic. An outsole having a structure in which a resin or a thermoplastic elastomer is disposed, and both of them are melted and integrated and joined. 2. An outsole comprising a ground portion, a design portion, and a base portion, wherein the ground portion and the design portion are made of rubber, the base portion is made of a thermoplastic resin or a thermoplastic elastomer, and the base portion is An outsole having a structure in which it is fused and integrated with a grounding portion or a design portion of rubber. 3. The base portion of the outsole is 0.1 m
2. A rubber having a thickness of m or more and 0.5 mm or less and a thermoplastic resin or a thermoplastic elastomer having a thickness of 0.1 mm or more and 1.0 mm or less are joined and integrated.
Outsole described. 4. The base portion of the outsole is 0.1 m
The outsole according to claim 2, wherein the outsole is made of a thermoplastic resin or a thermoplastic elastomer having a thickness of m or more and 1.0 mm or less. 5. The outsole according to claim 1, wherein the base portion of the outsole has a three-dimensional corrugated three-dimensional curved surface shape. 6. The outsole according to claim 1, wherein the outsole is EVA,
A shoe sole characterized by being integrally joined to a midsole made of a material such as PE-based olefin sponge or polyurethane sponge.