CN213695933U

CN213695933U - High-elastic anti-slip insole made of cork EVA (ethylene-vinyl acetate copolymer) elastomer

Info

Publication number: CN213695933U
Application number: CN202020940812.5U
Authority: CN
Inventors: 刘显奎; 蒋鹏; 石飞; 王占星
Original assignee: Soft Mu New Material Technology Nanjing Co ltd; China Leather and Footwear Research Institute Co Ltd
Current assignee: Soft Mu New Material Technology Nanjing Co ltd; China Leather and Footwear Research Institute Co Ltd
Priority date: 2020-05-28
Filing date: 2020-05-28
Publication date: 2021-07-16
Anticipated expiration: 2030-05-28

Abstract

The utility model discloses a high-elastic limited slip shoe-pad of cork EVA elastomer, including the shoe-pad body, the shoe-pad body includes at least two-layer stack layer, the upper strata in the stack layer is cork granule combined material's contact layer, the contact layer downside is provided with the elastic layer, compression molding behind contact layer and the elastic layer rubber coating. The middle layer elastomer made of the EVA rubber-plastic composite material replaces a cork material, and the components of the middle layer elastomer comprise EVA, POE, EPDM and modified starch, so that the problems of poor wear resistance and tensile strength of the EVA material are solved, the resilience of the material is enhanced, and the moisture absorption and natural degradation performance of the EVA rubber-plastic material are improved; by designing a sandwich structure with three layers or a two-layer superposed structure, the cork composite material is adopted on the upper layer, the adaptability advantage of the cork composite material and the human foot is fully exerted, the foot feeling is fine and comfortable, and the advantage of good slip resistance of the composite material is fully exerted.

Description

High-elastic anti-slip insole made of cork EVA (ethylene-vinyl acetate copolymer) elastomer

Technical Field

The utility model relates to a shoes processing technology field especially relates to a high-elastic limited slip shoe-pad of cork EVA elastomer.

Background

In the current shoe market, more than 60% of insole materials of sports shoes and tourist shoes in China are made of EVA rubber-plastic foam materials. The EVA foaming material is widely applied due to the advantages of lightness, good elasticity, good flexibility, difficult wrinkle, excellent colorability, suitability for various climates and the like, but because the EVA foaming material does not absorb moisture per se and has poor compression resistance, the EVA foaming material has poor foot feel in the wearing process, and particularly can obviously generate the feeling of 'burning feet' in the environment with higher temperature. The non-hygroscopic property of the sole leads to the fact that when the sole is used as an insole, the sole is easy to be wet and smelly in a shoe cavity, and is not easy to degrade and easy to cause white pollution so as to threaten the environment.

The cork is taken from the bark of cork oak and is a natural renewable substance, about 4200 ten thousand very tiny cork cells are contained per square meter, so that the cork has high resilience, high friction coefficient, water resistance, aging resistance, oil resistance, high and low temperature resistance (-60 to +80 ℃), compression recovery, sound insulation and insect prevention, and more importantly, the cork gives a warm foot feeling to a human body and is a natural high-grade material for shoes. But the cork has limited compression resistance, and is difficult to restore after the pressure exceeds the elastic range of the cork; secondly, the cork has poor tensile strength and weak folding resistance, and is lack of flexibility and processability when used as a shoe material; and thirdly, high-grade cork is expensive.

A shoe product which has excellent elastic tensile property, is light and convenient, and effectively improves the foot comfort, is quite demanded by the current market.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a high-elastic limited slip shoe-pad of cork EVA elastomer to solve present shoe-pad that uses pure EVA expanded material and have not the moisture absorption and not degrade, wear the shoe-pad and skid smelly scheduling problem, can reduce simultaneously the motion, walk for a long time lead to the shoe-pad to skid and then lead to potential bodily injury risks such as sole bubble of grinding.

The following technical scheme is provided for solving the problem: the utility model provides a cork EVA elastomer high-elastic limited slip shoe-pad, includes the shoe-pad body, the shoe-pad body includes two at least layers of stack layers, the upper strata in the stack layer is cork granule composite's contact layer, the contact layer downside is provided with the elastic layer, contact layer and elastic layer moulding after the rubber coating.

As an improvement, the insole body comprises two superposed layers, the superposed layer of the upper layer is a cork particle composite material contact layer, the lower layer is an elastic layer made of an elastic composite material, the thickness of the cork particle composite material layer of the contact layer is 0.6-0.8mm, and the hardness is Shore A40-45; the thickness of the composite material layer of the elastic layer is 2-4.5mm, and the hardness is Shore A45-50.

As an improvement, the insole body comprises three superposed layers, namely an upper cork particle composite material contact layer, a middle composite material elastic layer and a lower cork composite material anti-slip layer.

As an improvement, the contact layer, the elastic layer and the anti-slip layer contact layer outer edge are provided with downward-turning hems, the elastic layer outer edge is provided with downward-turning hems, the anti-slip layer and the elastic layer are attached and then embedded into the hems of the contact layer, the elastic layer and the anti-slip layer are attached and then embedded into the hems of the contact layer, and after the attachment is completed, the lower ends of the contact layer hems and the elastic layer hems are flush with the bottom end face of the anti-slip layer respectively. The laminating alignment is realized, and the wholeness is better, and compression molding back, the bulk strength is better, and life is longer.

As an improvement, the thickness of the cork composite material contact layer of the upper layer is 0.6-0.8mm, and the hardness is Shore A40-45; the thickness of the composite material elastic layer of the middle layer is 2-4.5mm, and the hardness is Shore A45-50; the thickness of the cork composite material slip-resistant layer at the lower layer is 0.8-1mm, and the hardness is Shore A50-55. Adjustment thickness and hardness differentiation, the sense of touch is better when realizing the contact of contact layer, increase the travelling comfort, the elastic property furthest embodies and bigger circulation of air stroke easily promotes the moisture absorption effect in the great size space of elastic layer, limited slip layer is greater than the thickness and the hardness of contact layer, the combination of thickness and hardness performance then realizes the limited slip performance better than the contact layer, the structure between the three-layer is supplementary each other, realize whole frivolous, elasticity is good, the moisture absorption performance is good, then obtain better travelling comfort.

As an improvement, the bottom surface of the anti-slip layer is provided with evenly distributed anti-slip particles.

As an improvement, the anti-slip layer is provided with V-shaped anti-slip bulges which are arranged in an array way.

As a refinement, the elastic layer is provided with a mesh-like eyelet structure. The ventilation effect of the whole insole body is improved, sweat and water vapor can conveniently circulate up and down, and the sweat and the water can be absorbed in a larger space, so that the insole is beneficial to keeping dry and comfortable for a longer time; furthermore, the irregular surface is more beneficial to the stability of the bonding connection between the upper layer and the lower layer.

As an improvement, the elastic layer is provided as a smooth structure. The processing is convenient, the whole body is lighter and thinner, and the visual appearance effect is more attractive.

As an improvement, the contact layer and the anti-slip layer are both obtained by cutting cork particles after compression molding, and the cork particles are stacked and extruded in the structural layer.

As an improvement, the composite material elastic layer is formed by mixing, assembling and compression molding composite components including EVA, rubber and modified starch, and the rebound resilience range of the formed flaky structural layer is 48-52%. In the composite material elastic layer in the scheme, the composite material performance is good, besides the good resilience performance, the modified starch is formed by grafting the corn starch through vinyl acetate, and contains ester groups capable of chemically crosslinking with EVA, so that hydrophilic hydroxyl groups are actually introduced into the EVA elastomer, and therefore the composite material elastic layer has better hygroscopicity, and the specific adsorbable moisture accounts for 5% -8% of the dead weight; in the prior case, the elastomer made of EVA has no hygroscopicity, namely the hygroscopicity is 0, and the rebound resilience is 45-55%; the moisture absorption of the bamboo fiber under the standard condition can reach 8-11%; but the rebound rate is generally within 15 percent; the moisture absorption of the cotton fiber is generally 8-10%, but the rebound resilience is generally within 10%; compared with the conventional materials, the composite high-performance elastic layer has obvious advantages in comprehensive performance and better wearing comfort.

As an improvement, the thickness of the half sole part of the insole body is 3.8mm-4.0mm, and the thickest heel part of the insole body is 5.7-6.0 mm; wherein the thickness of the contact layer is 0.6-0.8 mm; the thickness of the elastic layer is designed to be thin at the half sole part and thick at the heel part, the thickness of the half sole part is 2.0-2.2mm, and the thickness of the heel part is 4.0-4.5 mm; the thickness of the anti-slip layer is 0.8-1.0 mm; the diameter of the cork particles used in the contact layer is 0.5mm-1.0 mm; the thickness of the EVA rubber-plastic elastomer of the elastic layer is 2.0-4.5mm, and the diameter of cork particles used in the lower anti-slip layer is 0.8-4.0 mm. The garment conforms to the mechanical design of human bodies, and has good wearing comfort and anti-fatigue effect; the cork particles of the anti-slip layer are taken from a split cork composite layer, and in this scheme, if the scheme is a two-layer stacking scheme, the anti-slip layer is not included.

As an improvement, the modified starch in the elastic layer of the composite material accounts for 15 to 35 percent of the weight of the whole composition. The content of modified starch accounts for than higher, can promote product material performance, realizes the on-stick masterplate of foaming drawing of patterns, and the shaping effect is better, and the roughness of preferred can be realized on the product surface, and the product space is even compact, and elasticity is higher, and compression resistance can effectively promote to possess better hygroscopicity.

By utilizing a three-layer superposed sandwich structure or a two-layer superposed structure, fine and comfortable foot feeling is provided by a cork compound with finer particles on the upper layer; the middle EVA rubber-plastic elastomer provides the strength and elasticity of the whole insole, plays a role of a reinforcing layer, ensures that the folding resistance and other physical properties of the whole insole can meet the basic requirements of common insoles, has proper water absorption and can absorb part of water vapor emitted by foot sweat; the lower layer provides super-strong anti-slip performance by the cork compound with larger particles, and can ensure that the foot and the insole as well as the insole and the sole do not slip when the shoe is worn. In addition, the middle EVA rubber-plastic elastomer contains a large amount of modified starch components, so that the middle EVA rubber-plastic elastomer has certain hygroscopicity; if the design of the mesh structure is adopted, the moisture absorption area of the insole can be increased, and the sweat and moisture in the shoe cavity can be favorably absorbed through the mesh sinking. The whole insole can be naturally degraded under certain conditions, so that natural pollution is reduced, and the insole is more environment-friendly.

The utility model discloses a beneficial effect lie in: the middle layer elastomer made of the EVA rubber-plastic composite material replaces a cork material, and the components of the middle layer elastomer comprise EVA, POE, EPDM and modified starch, so that the problems of poor wear resistance and poor tensile strength of the EVA material are solved, the resilience of the material is enhanced, and the hygroscopicity and the natural degradation performance of the EVA rubber-plastic material are increased; the cork composite material is used in the upper layer and the lower anti-slip layer, so that the excellent foot feeling and the excellent anti-slip performance of the cork material are fully exerted, the human body can feel comfortable, the insole can be prevented from slipping for a long time in the shoe, and the injury to the human body caused by long-distance motion bubble abrasion is prevented; by designing a sandwich structure with three layers or a two-layer superposed structure, and adopting the cork composite material on the upper layer, the adaptability advantage of the cork composite material and the human foot is fully exerted, and the foot feeling is fine and comfortable; the lower layer adopts a cork particle composite material with a slightly larger particle size, so that the advantage of good slip resistance of the composite material is fully exerted; the middle layer is a high-performance elastic layer compounded by three main components of EVA, rubber and modified starch, has the moisture absorption of 5-8% of the self weight, and further improves the wearing comfort; the upper cork layer, the middle EVA rubber-plastic elastomer and the lower cork anti-slip layer are firmly connected through high-temperature mould pressing.

Drawings

The present invention will be further explained with reference to the accompanying drawings:

FIG. 1 is a schematic view of a partial cross-sectional structure of an embodiment of the present invention;

FIG. 2 is a schematic structural view of the three-layer structure of the sole body of FIG. 1;

fig. 3 is a structural view of the two-layer structure of the sole body in fig. 1.

Detailed Description

Example one

As shown in fig. 1 and 3, a concrete embodiment in this utility model, a cork EVA elastomer high-elastic limited slip shoe-pad, including shoe-pad body 1, the shoe-pad body includes two-layer at least stack layer, the upper strata in the stack layer is cork granule composite's contact layer 2, the contact layer downside is provided with elastic layer 3, compression molding behind contact layer and the elastic layer rubber coating.

In this embodiment, the insole body comprises two stacked layers, the stacked layer of the upper layer is a cork particle composite material contact layer, the lower layer is an elastic layer made of an elastic composite material, the thickness of the cork particle composite material layer of the contact layer is 0.6mm, and the hardness is shore a 40; the thickness of the composite material layer of the elastic layer is 3mm, and the hardness is Shore A46.

In this embodiment, the anti-slip layer is provided with V-shaped anti-slip protrusions arranged in an array.

In this embodiment the elastic layer is provided with a mesh-like eyelet structure 5. The ventilation effect of the whole insole body is improved, sweat and water vapor can conveniently circulate up and down, and the sweat and the water can be absorbed in a larger space, so that the insole is beneficial to keeping dry and comfortable for a longer time; furthermore, the irregular surface is more beneficial to the stability of the bonding connection between the upper layer and the lower layer.

Foaming in a mould with a mesh structure to obtain the middle layer elastic shoe material, and measuring in a standard environment, wherein the water absorption steam can reach 5% of the self weight after 5 hours.

In this embodiment, the elastic layer is provided as a smooth structure. The processing is convenient, the whole body is lighter and thinner, and the visual appearance effect is more attractive.

In this embodiment, the contact layer and the anti-slip layer are both obtained by cutting cork particles after compression molding, and the structural layer is formed by mutually stacking and compression molding cork particles.

In the embodiment, the composite material elastic layer is formed by mixing, assembling and compression molding EVA, rubber and modified starch, and the rebound resilience range of the formed sheet-like structural layer is 48-52%.

In the composite material elastic layer in the scheme, the composite material performance is good, besides the good resilience performance, the modified starch is formed by grafting the corn starch through vinyl acetate, and contains ester groups capable of chemically crosslinking with EVA, so that hydrophilic hydroxyl groups are actually introduced into the EVA elastomer, and therefore the composite material elastic layer has better hygroscopicity, and the specific moisture absorbable capacity accounts for 5% -8% of the self weight; in the prior case, the elastomer made of EVA has no hygroscopicity, namely the hygroscopicity is 0, and the rebound resilience is 45-55%; the moisture absorption of the bamboo fiber under the standard condition can reach 8-11%; but the rebound rate is generally within 15 percent; the moisture absorption of the cotton fiber is generally 8-10%, but the rebound resilience is generally within 10%; compared with the conventional materials, the composite high-performance elastic layer has obvious advantages in comprehensive performance and better wearing comfort.

In the embodiment, the thickness of the half sole part of the insole body is 3.8mm, and the thickest heel part of the insole body is 5.7 mm; wherein the thickness of the contact layer is 0.6 mm; the thickness of the elastic layer is designed to be thin at the half sole part and thick at the heel part, the thickness of the half sole part is 2.0mm, and the thickness of the heel part is 4.0 mm; the thickness of the anti-slip layer is 0.8 mm; the cork particle diameter used in the contact layer is 0.5 mmmm; the thickness of the EVA rubber-plastic elastomer of the elastic layer is 2.0mm, and the diameter of cork particles used in the lower anti-slip layer is 1.0 mm.

The garment conforms to the mechanical design of human bodies, and has good wearing comfort and anti-fatigue effect; the cork particles of the anti-slip layer are taken from a split cork composite layer, and in this scheme, if the scheme is a two-layer stacking scheme, the anti-slip layer is not included.

In the embodiment, the modified starch in the elastic layer of the composite material accounts for 15-35% of the weight of the whole composition.

The content of modified starch accounts for than higher, can promote product material performance, realizes the on-stick masterplate of foaming drawing of patterns, and the shaping effect is better, and the roughness of preferred can be realized on the product surface, and the product space is even compact, and elasticity is higher, and compression resistance can effectively promote to possess better hygroscopicity.

Example two

As shown in fig. 1 and fig. 2, the difference from the first embodiment is that in this embodiment, the insole body 1 includes three stacked layers, including an upper cork particle composite material contact layer 2, a middle composite material elastic layer 3, and a lower cork composite material anti-slip layer 4.

In this embodiment, the cork composite contact layer of the upper layer has a thickness of 0.7mm and a hardness of shore a 45; the thickness of the composite material elastic layer of the middle layer is 4mm, and the hardness is Shore A50; the thickness of the cork composite material slip-resistant layer of the lower layer is 1mm, and the hardness is Shore A55.

In this embodiment, the contact layer, the elastic layer, and the non-slip layer contact layer outer edge are provided with downward-turned hems, the elastic layer outer edge is provided with downward-turned hems, the non-slip layer is attached to the elastic layer and then embedded into the hems of the protective layer, and the lower end of the contact layer hem and the lower end of the elastic layer hem are flush with the bottom end face of the non-slip layer respectively after the contact layer, the elastic layer, and the non-slip layer are attached to each other and then embedded into the hems of the contact layer. The laminating alignment is realized, and the wholeness is better, and compression molding back, the bulk strength is better, and life is longer.

Adjustment thickness and hardness differentiation, it is better to realize the contact layer sense of touch, increase the travelling comfort, the elastic property furthest embodies and bigger circulation of air stroke easily promotes the moisture absorption effect in the great size space of elastic layer, limited slip layer is greater than contact layer thickness and hardness, the combination of thickness and hardness then realizes the limited slip performance better than the contact layer, the structure is supplementary each other between the three-layer, realize whole frivolous, elasticity is good, the moisture absorption performance is good, then obtain better travelling comfort.

In this embodiment, the bottom surface of the anti-slip layer is provided with evenly distributed anti-slip particles.

In the embodiment, the thickness of the front sole 6 part of the insole body is 4.0mm, and the thickest part of the heel 7 part of the insole body is 5.9 mm; wherein the thickness of the contact layer is 0.8 mm; the thickness of the elastic layer is designed to be thin at the half sole part and thick at the heel part, the thickness of the half sole part is 2.2mm, and the thickness of the heel part is 4.5 mm; the thickness of the anti-slip layer is 1.0 mm; the diameter of cork particles used in the contact layer is 1.0 mm; the thickness of the EVA rubber-plastic elastomer of the elastic layer is 4mm, and the diameter of cork particles used by the lower anti-slip layer is 3.0 mm.

EXAMPLE III

The difference from the previous embodiment is that: in the embodiment, the thickness of the front sole 6 part of the insole body is 3.9mm, and the thickest part of the heel 7 part of the insole body is 5.9 mm; wherein the thickness of the contact layer is 0.7 mm; the thickness of the elastic layer is designed to be thin at the half sole part and thick at the heel part, the thickness of the half sole part is 2.1mm, and the thickness of the heel part is 4.3 mm; the thickness of the anti-slip layer is 0.9 mm; the diameter of the cork particles used in the contact layer is 0.8 mm; the thickness of the EVA rubber-plastic elastomer of the elastic layer is 3.5mm, and the diameter of cork particles used in the lower anti-slip layer is 3.0 mm.

In this embodiment, the bottom surface of the anti-slip layer is provided with anti-slip woven picture lines which are uniformly distributed.

In addition to the above preferred embodiments, the present invention has other embodiments, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention.

Claims

1. The utility model provides a cork EVA elastomer high-elastic limited slip shoe-pad, includes shoe-pad body (1), its characterized in that: the insole body comprises at least two superposed layers, the upper layer of each superposed layer is a contact layer (2) made of cork particle composite materials, an elastic layer (3) is arranged on the lower side of each contact layer, and the contact layers and the elastic layers are molded by die pressing after being coated with glue.

2. The cork EVA elastomer high-elastic anti-slip insole according to claim 1, characterized in that: the insole body comprises two superposed layers, wherein the superposed layer on the upper layer is a cork particle composite material contact layer, the superposed layer on the lower layer is an elastic layer made of an elastic composite material, the thickness of the cork particle composite material layer of the contact layer is 0.6-0.8mm, and the hardness is Shore A40-45; the thickness of the composite material layer of the elastic layer is 2-4.5mm, and the hardness is Shore A45-50.

3. The cork EVA elastomer high-elastic anti-slip insole according to claim 1, characterized in that: the insole body comprises three superposed layers, namely an upper cork particle composite material contact layer (2), a middle composite material elastic layer (3) and a lower cork composite material anti-slip layer (4).

4. The cork EVA elastomer high-elastic anti-slip insole according to claim 3, wherein: the thickness of the cork composite material contact layer on the upper layer is 0.6-0.8mm, and the hardness is Shore A40-45; the thickness of the composite material elastic layer of the middle layer is 2-4.5mm, and the hardness is Shore A45-50; the thickness of the cork composite material slip-resistant layer at the lower layer is 0.8-1mm, and the hardness is Shore A50-55.

5. The shoe pad of claim 1 or 3, which is characterized by comprising: the elastic layer is provided with a mesh structure (5).

6. The shoe pad of claim 1 or 3, which is characterized by comprising: the contact layer, the elastic layer and the anti-slip layer contact the outer edge of the layer and are provided with folded edges which are turned over downwards, the outer edge of the elastic layer is provided with folded edges which are turned over downwards, the folded edges are embedded into the folded edges of the protective layer after the anti-slip layer and the elastic layer are attached and embedded into the folded edges of the contact layer, and after the contact layer, the elastic layer and the anti-slip layer are attached, the lower ends of the folded edges of the contact layer and the lower ends of the folded edges of the elastic layer are respectively parallel and level to the bottom end face of the.

7. The cork EVA elastomer high-elastic anti-slip insole according to claim 3, wherein: the contact layer and the anti-slip layer are both formed by molding cork particles and then cutting.

8. The cork EVA elastomer high-elastic anti-slip insole according to claim 3, wherein: the composite material elastic layer is formed by mixing, assembling and compression molding EVA, rubber and modified starch, and the rebound resilience range of the formed sheet-shaped structural layer is 48-52%.

9. The shoe pad of claim 1 or 3, which is characterized by comprising: the thickness of the half sole (6) part of the insole body is 3.8-4.0 mm, and the thickest part of the heel (7) part of the insole body is 5.7-6.0 mm; wherein the thickness of the contact layer is 0.6-0.8 mm; the thickness of the elastic layer is designed to be thin at the half sole part and thick at the heel part, the thickness of the half sole part is 2.0-2.2mm, and the thickness of the heel part is 4.0-4.5 mm; the thickness of the anti-slip layer is 0.8-1.0 mm; the diameter of the cork particles used in the contact layer is 0.5mm-1.0 mm; the thickness of the EVA rubber-plastic elastomer of the elastic layer is 2.0-4.5mm, and the diameter of cork particles used in the lower anti-slip layer is 0.8-4.0 mm.

10. The cork EVA elastomer high-elastic anti-slip insole according to claim 8, characterized in that: the modified starch in the elastic layer of the composite material accounts for 15 to 35 percent of the weight of the whole composition.