JPH0424001A - Outsole having macromolecular elastomer foam surface reinforced with high strength fiber - Google Patents

Abstract

PURPOSE:To obtain the title outsole suitable for sports shoes having wear resistance, large resilience and excellent durability at all the surface at which the outsole is in contact with the ground, by a method wherein the undersurface and side surface of a macromolecular elastomer foam-made outsole are reinforced with a high strength fiber. CONSTITUTION:Both an undersurface 2 and a side surface 3 of a macromolecular elastomer foam-made outsole body 1 are covered with an aramid fiber-made mesh-like body 4. Among all aromatic polyamide fiber, an aramid fiber with high performance para-orientation is usually used. Meshy woven cloth, knit cloth, or the like is properly used as the mesh-like body 4. All the undersurface 2 and the side surface 3 of the outsole body 1 are covered with the aramid fiber-made mesh-like body 4 having high strength, and at a course of actions between landing and kicking, impact from the ground is immediately transmitted, and it reaches a mesh-like body 4 nearby and spreads to the whole of the outsole body 1. In this way, the fact that the title outsole is deformed by receiving the impact only at a particular part, is not produced.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention is lightweight and can reduce impact from road and floor surfaces.
In addition, the sole has a foamed polymer elastomer surface reinforced with high-strength fiber, which is suitable for sports and has a large repulsion force (and excellent durability) for smooth running.

<Prior art> For example, shoes for sports such as jogging shoes are lightweight so that the feet do not get tired while jogging, pain in the knees, etc. is minimized, and they are also designed to reduce the impact from the road surface, floor surface, etc. Shoe soles are used. To make the shoe lighter, soles are mainly made of foam such as rubber or plastic, and to minimize pain in the knees, etc., a combination of solid elastomer such as rubber or plastic and foam elastomer is used. , soles were used that were as thick as possible or had a wide contact area.

<Problems to be Solved by the Invention> However, the soles conventionally used as described above do not allow the contact area of the sole to be intensively removed from the road or floor surface in a series of movements from landing to kicking off. Although they have been used to absorb shock and increase repulsion, they have not always had the desired effect, and in fact, they wear out and wear out more quickly, resulting in poor durability.

The present invention aims to solve the problems that the conventional shoe soles had.

<Means for Solving the Problems> The present invention includes a plan view shown in FIG. 1, a schematic diagram illustrating a cross section taken along the line A-A in FIG. As shown in the schematic diagram shown in FIG. The gist of this shoe is a sole with a molecular elastomer surface reinforced with high-strength fibers.

In addition, other examples in FIG. 4, FIG. 2, and FIG.
In a shoe sole in which the surface of the foamed polymer elastomer is reinforced with high-strength fibers, as shown in another example in FIG. The gist can also be characterized by embedding (6).

The aramid fibers may be any wholly aromatic polyamide fibers, such as those with meta orientation or those with loose orientation, but usually those with high performance and loose orientation are used. As the net-like body (4), a mesh-like one, a two-knit woven cloth, or the like is used as appropriate.

As the foamed polymer elastomer and the solid polymer elastomer, natural rubber, styrene-butadiene copolymer rubber, polyisoprene rubber, etc., or blends thereof, polyurethane, ethylene-vinyl acetate copolymer, etc. are used.

As shown in FIGS. 4 and 5, the foamed polymer elastomer sole body (1) has an aramid fiber mesh (4) that covers not only the ground contact surface (2) and side surfaces (3) but also the lower surface of the instep. A part of the adhesive surface (5), that is, the peripheral part (7) may also be covered.

<Function> The foamed polymer elastomer sole body (1) is attached to the tread surface (2
) and the sides (3) are all covered with an extremely strong aramid fiber mesh (4), so that the road surface and floor that are part of the series of movements from landing to kicking off The impact from the surface immediately propagates from the part that received the impact, reaches the nearest net-like body (4), and spreads throughout the sole body (11) from that point, as if diffusely reflected.

Therefore, only a specific part receives the impact and does not deform.

In this way, the entire sole acts like a rubber band, providing improved cushioning, shock absorption, and repulsion, as well as improved durability and weight reduction. Furthermore, by embedding a solid polymer elastomer filler (ra) inside the foamed polymer elastomer sole body (1), in addition to the various functions described above, traction properties can be further improved.

<Example> In Figures 1, 4, and 5, the sole body (1) is a foam (expansion ratio 130%) of ethylene vinyl acetate copolymer (vinyl acetate content 20%). , filling body (
6): Polyisoprene rubber 70 1 part heavy Polybutadiene rubber 30 Zinc white 5 Stearic acid 1 Sulfur 2 Vulcanization accelerator DM 1.5 ~ l TS
A vulcanized solid body (thickness: 5 mm) consisting of a kneaded product of O, 2 carbon black HAF60 was used, and the aramid fiber net (4) was a 1000 denier fiber treated with RFL to improve adhesive strength. Mesoush weave (bias cut) is used, length 25.0
cm, heel thickness 25 cm, tread thickness 15 tm
got the sole of the shoe.

In addition, a shoe sole without the bare aramid fiber net-like body (4) was obtained, and this was used as a target example.

When I jogged for about 3 hours at a time for 3 months using shoes obtained using both methods, I found that the former shoes did not hurt my knees, I could run comfortably, and the contact between the soles of the shoes improved. Although the ground was hardly destroyed, the shoes made by the latter caused damage to the knees and gave the impression that the feet were heavy while running, and the outside of the heel part of the sole of the shoe had been worn down by about 4 fl.

<Effects> When the soles of the present invention, in which the surface of the foamed polymer elastomer is reinforced with high-strength fibers, are used in shoes, the knees will not be damaged, the feet will feel lighter while running, and the wear and tear of all parts of the contact surface will be reduced. There were very few.

[Brief explanation of drawings]

Figure 1 is a plan view of a shoe sole in which the foamed polymer elastomer surface of the present invention is reinforced with high-strength fibers, and Figure 2 is A-A in Figure 1.
3 is a schematic cross-sectional view taken along the line B--B of FIG. 1, FIG. 4 shows another embodiment of FIG. 2, and FIG. 5 shows another embodiment of FIG. 3. (1) - Foamed polymer elastomer sole body, (2) (1
), (3) - side surface of (1), (4) - aramid fiber mesh, (5) - adhesive surface with the lower surface of the carapace,
(6) Filled polymer elastomer packing, (7) -
Peripheral area of <51.

Claims (2)

[Claims] (1) A foamed polymeric elastomer surface characterized in that at least the contact surface (2) and side surfaces (3) of the foamed polymeric elastomer sole body (1) are covered with an aramid fiber mesh (4). The sole is reinforced with high-strength fiber. (2) The surface of the foamed polymer elastomer according to claim 1, in which a solid polymer elastomer filler (6) is embedded inside the foamed polymer elastomer sole body (1), is reinforced with high-strength fibers. Shoe sole.