Lace-up insole

Abstract

The invention discloses a silk circle insole, which comprises a silk circle layer and a covering body. The silk circle layer comprises a plurality of elastic silk made of foamed material or non-foamed material. The plurality of elastic silk are intertwined and adhered to each other in a loose and spaced manner, and a plurality of gaps are formed between adjacent elastic silk. The covering body wraps the elastic silk and fills all or part of the gaps. Another silk circle insole comprises a silk circle layer and a thermoplastic layer covering the silk circle layer. The silk circle layer comprises a plurality of elastic silk made of foamed material. The thermoplastic layer is formed after the silk circle layer is melted and solidified. The two insoles both adopt the structure of wrapping the plurality of elastic silk with another layer of material. The large number of intertwined and adhered elastic silk can form a hollow structure with good strip foamed interlacing and elasticity. The hollow structure can reduce the material density and increase the air permeability. The elastic silk itself has mechanical elasticity and strength, which increases the material physical properties and changes the material mechanics of the insole, so that the insole has smaller density, better air permeability and better elasticity.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of insoles, in particular to a silk ring insole. BACKGROUND

[0002] The insole or the shoe sole is an extremely important component in shoes, has the functions of softness, comfort and shock absorption, and becomes one of the important standards for judging the quality of shoes because it can relieve heel fatigue and evenly absorb the impact on the sole.

[0003] In order to pursue the characteristics of light quality and good elasticity, the existing insole is generally made of foaming material. The essence of foaming material is to inject a large amount of gas into the non-foaming material to form a sponge pore structure. Although this structure can reduce the material density and increase the elasticity and air permeability, it has the disadvantage of poor mechanical properties (tear strength, tensile strength, compression performance, etc.) leading to poor firmness, poor wear resistance and poor strength. Although the outer layer of the foaming material has relatively good properties, the outer layer is too thin and does not help to change the properties of the entire insole.

[0004] The existing technology has a silk ring material, which is generally used in floor mats, and is made of non-foaming PVC. It is a plurality of non-foaming filaments arranged in a regular or irregular manner and interwoven, and adjacent filaments are connected by fixed connection points to form a silk ring material with a certain thickness and upper and lower surfaces. The fixed connection points are directly fused and bonded at the joint of the molten filaments. The silk ring has the advantages of low density, good air permeability, good elasticity, good tensile strength, etc. However, the silk ring material cannot be shaped according to the product. A silk ring has a certain thickness, and must be cut before use. After cutting, the silk ring will be loose and easily torn due to the breakage of the silk threads, and the surface and the inside will have a lot of gaps, so sand and soil can enter. The silk ring cannot be firmly attached to other materials due to the gaps in the surface layer, and has poor stability. The existing silk ring cannot be processed into products with different thicknesses, and can only be used for products with a certain thickness and shape. It cannot be used for secondary shaping, and cannot be used as a shoe sole.

[0005] In order to solve the above problems, it is urgent to develop an insole or shoe sole with small material density, good air permeability and mechanical elasticity. SUMMARY

[0006] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide two kinds of silk ring insoles, which are both covered with another layer of material to cover a plurality of elastic filaments. A large number of elastic filaments are interwoven and mutually bonded to form a hollow structure with a strip-shaped foaming or non-foaming interweaving and good elasticity. The hollow structure can greatly reduce the material density and increase the air permeability, and the elastic filaments themselves have mechanical elasticity and strength, which greatly increases the material properties of the insole and changes the material mechanics of the insole, so that the insole has smaller density, better air permeability and better elasticity.

[0007] One of the purposes of the present application is achieved by adopting the following technical solutions:

[0008] The silk circle insole comprises a silk circle layer and a covering main body, the silk circle layer comprises a plurality of elastic silk made of foamed material or unfoamed material, the plurality of elastic silk are intertwined and bonded to each other in a loose and spaced manner, and a plurality of gaps are formed between adjacent elastic silk.

[0009] Further, when the elastic silk is made of unfoamed material, the covering main body is made of foamed material or GEL material.

[0010] Further, the elastic silk is made of foamed material, and the covering main body can be made of foamed material or unfoamed material, the foamed material can be PU foaming, and the unfoamed material can be unfoamed PU, RB, silica gel, PVC, GEL, TPR, TPU, SEBS, TPE or glue.

[0011] Further, the silk circle insole is coated with a protective film for preventing oxidation, hydrolysis and aging of the silk circle insole and increasing the fitting force and properties, and the protective film is made of TPU material.

[0012] Further, the covering main body is a transparent main body.

[0013] The second purpose of the present application is achieved by adopting the following technical solutions:

[0014] The silk circle insole comprises a silk circle layer and a thermoplastic layer covering the silk circle layer, the silk circle layer comprises a plurality of elastic silk intertwined and bonded to each other in a loose and spaced manner, a plurality of gaps are formed between adjacent elastic silk, the elastic silk is made of foamed material, and the thermoplastic layer is formed by melting and bonding the surface of the silk circle layer.

[0015] Further, the silk circle insole further comprises a wear-resistant layer for serving as a shoe sole, and the wear-resistant layer is attached to the covering main body or the thermoplastic layer by heat sealing or bonding.

[0016] Further, the silk circle layer is provided with a plurality of foamed particles or foamed strips or air bags, and the covering main body or the thermoplastic layer covers and bonds the foamed particles or foamed strips or air bags outside the silk circle layer.

[0017] Further, the silk ring insole is provided with a functional part, which is at least one of a filling air bag for increasing elasticity or a light-emitting structure; the light-emitting structure is provided with a light-emitting source and light-emitting powder for light emission, the light-emitting source is an LED lamp or a fiber lamp, the light-emitting powder is any one of fluorescent powder or color-changing powder, the light-emitting source is arranged in a plurality of the silk ring insoles or adhered to the silk ring insoles, and the light-emitting powder can be arranged in the elastic silk.

[0018] The third purpose of the present application is achieved by the following technical solution:

[0019] The silk ring insole is processed by the pouring method, and the steps are as follows:

[0020] S1. The corresponding elastic silk material is cut according to the required size, and the cut elastic silk is placed in the mold cavity;

[0021] S2. Liquid coating bodies are poured into the mold cavity, so as to penetrate into the gaps between the elastic silks and wrap the outer periphery of the elastic silks;

[0022] S3. The mold is closed and pressure is applied, so that the elastic silks and the coating bodies are solidified and integrally formed;

[0023] S4. After forming, the mold is opened, and the excess material is removed.

[0024] The fourth purpose of the present application is achieved by the following technical solution:

[0025] The silk ring insole is processed by the hot pressing method, and the steps are as follows:

[0026] A1. The corresponding elastic silk material is cut according to the required size, and the cut elastic silk is placed in the mold cavity;

[0027] A2. The mold is closed and continuously heated, or the elastic silk material is heated, and pressure is applied to the mold cover;

[0028] A3. After forming, the insole is taken out and the excess material is removed.

[0029] Compared with the prior art, the present application has the following advantages:

[0030] The silk circle insole of the present application comprises a silk circle layer and a covering body. The silk circle layer comprises a plurality of elastic silk made of foamed material or non-foamed material. The plurality of elastic silk are intertwined and adhered to each other in a loose and spaced manner, and a plurality of gaps are formed between adjacent elastic silk. The covering body covers the elastic silk and fills all or part of the gaps. Another silk circle insole comprises a silk circle layer and a thermoplastic layer covering the silk circle layer. The silk circle layer comprises a plurality of elastic silk intertwined and adhered to each other in a loose and spaced manner, and a plurality of gaps are formed between adjacent elastic silk. The elastic silk is made of foamed material, and the thermoplastic layer is formed by melting and adhering the surface of the silk circle layer. Both of the two insoles adopt the structure of covering the plurality of elastic silk with another layer of material. The interwoven and adhered elastic silk can form a hollow structure with good strip foaming interweaving and elasticity. The hollow structure can greatly reduce the material density and increase the air permeability. The elastic silk itself has mechanical elasticity and strength, which greatly increases the material properties and changes the material mechanics of the insole, so that the insole has smaller density, better air permeability and better elasticity. Meanwhile, the two methods can be used to process different silk circle insoles, and the processing method is simpler and more efficient. BRIEF DESCRIPTION OF DRAWINGS

[0031] Fig. 1 is a structure schematic diagram of the preferred embodiment of the first silk circle insole of the present application;

[0032] Fig. 2 is a cross-sectional schematic diagram of the preferred embodiment of the second silk circle insole of the present application.

[0033] In the figure: 100, silk circle insole; 1, silk circle layer; 11, elastic silk; 12, covering body; 2, thermoplastic layer; 3, wear-resistant layer. DETAILED DESCRIPTION

[0034] In the following, the present application will be further described in conjunction with the drawings and specific embodiments. It should be noted that the embodiments described below or the technical features thereof can be combined in any manner to form new embodiments without conflict.

[0035] The silk circle insole 100 of the present embodiment is as shown in Figs. 1-2 , which comprises a silk circle layer 1 and a covering body 12. The silk circle layer 1 comprises a plurality of elastic silk 11 made of foamed material. The plurality of elastic silk 11 are intertwined and adhered to each other in a loose and spaced manner, and a plurality of gaps are formed between adjacent elastic silk 11. The covering body 12 covers the elastic silk 11 and fills all or part of the gaps. The elastic silk 11 of this kind of insole is made of foamed material. Meanwhile, the outer periphery and the hollow gaps are filled and adhered by the covering body 12. When wrapped and adhered to the outside of the elastic silk 11, the elastic silk 11 itself will be extruded in the hollow space and the gaps will be filled and adhered to form a high-strength network skeleton (of course, a similar skeleton will also be generated inside). The elasticity, density and physical properties are increased.

[0036] When the elastic filament 11 is made of a non-foamed material, the covering body 12 is made of a foamed material or a GEL material. Combining the two can also result in a lower density, better breathability, and better elasticity in the molded insole.

[0037] The loop insole 100 in this embodiment can be manufactured by injection molding, and the steps are as follows:

[0038] S1. Cut the corresponding elastic wire 11 material to the required size and place the cut elastic wire 11 into the mold cavity;

[0039] S2. Liquid is poured into the mold cavity to cover the main body 12, so that it penetrates into the gaps between the elastic filaments 11 and the outer periphery of the elastic filaments 11;

[0040] S3. Close the mold and apply pressure to solidify and bond or foam the elastic filaments 11 with the covering body 12 into a single mold.

[0041] S4. After molding, open the mold and remove the scraps.

[0042] Preferred method: When pouring the liquid coating material 12, the outer periphery of the loop can be selectively poured to prevent the coating material 12 from penetrating the central interior, thus preserving the voids in the central interior of the loop and preventing it from being filled by the coating material 12. In this case, the coating material 12 only fills the voids of a certain thickness on the outer periphery. (This operation is possible on the premise that the liquid coating material 12 has poor fluidity, hardens quickly, and the voids in the loop are fine, so the liquid coating material 12 stops penetrating the outer periphery once it reaches a certain thickness.) In this way, the loop insole 100 meets the physical properties of the sole and achieves the shaping purpose, while also preserving more voids inside that are not filled by the coating material 12, reducing density and saving the material of the coating material 12. (The physical properties and shaping of the sole mainly depend on the outer periphery of the loop. Since the inside of the loop is made of elastic fibers 11 bonded together, there is no quality problem even if the coating material 12 does not fill the voids in the central part of the loop.)

[0043] Due to the structural characteristics of the elastic filament 11, the connecting surface formed by several elastic filaments 11 intertwining is hollow and uneven, not flat. This means that when the elastic filament 11 is connected to other materials, it may not be able to bond very firmly. However, by using the above-mentioned injection method, since the covering body 12 is first injected from liquid material and then solidified, the resulting insole structure can ensure that the covering body 12 and the elastic filament 11 are bonded more firmly to each other, and form a strong fit, which greatly enhances the bonding strength of the materials.

[0044] In this embodiment, the loop insole 100 is integrally molded by casting elastic yarns 11 and a covering body 12. The covering body 12 penetrates and fills the gaps between the elastic yarns 11, expelling air and forming a high-strength, high-property-value, and waterproof network skeleton around the elastic yarns 11. This effectively improves the material's mechanical properties, strength, and abrasion resistance, and also provides better water resistance and durability. The network skeleton and the loops work together to give the insole better elasticity and lower density. The gaps between the elastic yarns filled by the covering body 12 will shrink or even be compressed due to the compression of the top cover, causing the covering body 12 to tightly bond the foam yarns together and disappear.

[0045] In this design, the covering body 12 can be made of foamed or non-foamed material, with non-foamed material being preferred. Due to the high hardness and density of the covering body 12, when it is wrapped and bonded to the outside of the elastic filaments 11, it will compress the hollow spaces of the elastic filaments 11 and fill the gaps, bonding them together to form a high-strength network skeleton, increasing elasticity, reducing density, and enhancing physical properties. Simultaneously, the cast covering body 12 is preferably made of transparent material. After the transparent non-foamed material is cast, the structure of the elastic filaments 11 can be clearly seen on the appearance of the insole, revealing the various colors and structural changes of the elastic filaments 11. Simply changing the color and structure of the elastic filaments 11 can change the color and structure of the entire sole, avoiding the use of spray paint on the sole, making it more environmentally friendly and reducing costs. In addition, the transparent material wrapping the elastic yarn 11 allows sunlight to easily enter the insole, which can not only kill bacteria and prevent the sole from smelling bad, but also makes the sole durable because it is more likely to be exposed to water and less likely to be exposed to light when it is used. After being discarded, it will be exposed to light and water, and under the sunlight, the internal photochemical decomposition and degradation will be accelerated, making recycling and disposal more environmentally friendly. It is a smart material that changes the degradation rate according to the changing environment.

[0046] Preferably, when the covering body 12 is made of a high-strength material (such as TPU, non-foamed PU, RB, high-density hardness foamed PU, silicone, TPR, PVC, TPE, etc.), it is only necessary to replace the mold with a mold with a textured bottom. Finally, the insole with the bottom filled by the covering body 12 and the sole pattern can be obtained by processing and molding by the above-mentioned injection method. At this time, because the covering body 12 is strong and wear-resistant, the insole can be used directly as a wear-resistant sole, midsole or sole accessory that can contact the ground without the need for re-bonding the sole. This saves the trouble of producing soles and the process of bonding soles. In fact, it eliminates the high-pollution production links of rubber sole factories and bonding factories, making it more convenient, faster and more environmentally friendly.

[0047] In this embodiment, the covering body 12 can be made of a very soft and elastic material, such as shock-absorbing gel, silicone TPE, low-density foamed PU, PVC, SEBS, etc., which can produce insoles or midsoles with low hardness and good shock absorption, making the user's feet more comfortable.

[0048] This second embodiment also provides another type of loop insole 100, including a loop layer 1 and a thermoplastic layer 2 covering the loop layer 1. The loop layer 1 includes a plurality of elastic filaments 11 that are loosely interwoven and bonded together, forming numerous gaps between adjacent elastic filaments 11. The elastic filaments 11 are made of foamed material. The thermoplastic layer 2 is a high-density material formed by bonding the surface of the loop layer 1 together after heating it to a molten state. (The thermoplastic layer 2 can be a foamed or non-foamed material. It is formed by compressing the inside of the loop and bonding the foamed filaments together with heat to form a skeleton with higher density and hardness than the elastic filaments 11. The gaps on the surface of the thermoplastic layer will disappear or shrink depending on the degree of heat melting and compression. The larger gaps disappear, and the smaller gaps shrink.) The interweaving and bonding of a large number of elastic filaments 11 can form a hollow structure with strip-shaped foam interweaving and good elasticity. The hollow structure significantly reduces material density and increases breathability. Furthermore, the elastic yarn 11 itself possesses mechanical elasticity and strength. These factors greatly enhance the material properties and alter the material mechanics of the insole, resulting in a lower density, a better fit, greater durability, improved breathability, and enhanced elasticity. Simultaneously, the thermoplastic layer 2, made of foamed and hot-melt plasticized material, encapsulates the entire elastic yarn 11, forming a high-strength network skeleton. The hollowed-out outer layer creates a fitting surface and allows the yarn loops to be thermoplasticized into a firm state, increasing elasticity, reducing density, and enhancing physical properties.

[0049] The loop insole 100 in this second embodiment is formed by hot pressing, and the steps are as follows:

[0050] A1. Heating the mold;

[0051] A2. Cut the corresponding elastic wire 11 material to the required size so that the thickness of the elastic wire 11 material is greater than or equal to the thickness of the mold cavity (this operation is because the elastic wire 11 material in contact with the mold cavity during the hot pressing process will be heated and melted, and the thickness of the elastic wire 11 material will also become smaller), and put the cut elastic wire 11 into the mold.

[0052] A3. Close the mold and continue heating the mold, applying pressure to the top cover of the mold; (In this heating step, you can refer to the method of producing secondary EVA to heat the mold, or you can inject high-temperature steam into the mold to heat and melt the material, just like the steam forming method for producing popcorn shoe soles);

[0053] A4. After cooling and solidifying, remove the insole and trim off any scraps.

[0054] Preferred method: When using steam molding, high-temperature steam can be injected into the mold to melt the surface of the coil, and then pressure can be applied to the top cover.

[0055] In this second embodiment, the thermoplastic layer 2 is actually formed by the elastic filament 11 contacting the hot inner wall of the mold or being heated by water vapor and then melting and bonding. When the elastic filament 11 is placed into the mold and the mold or the elastic filament 11 is continuously heated, the parts of the foamed elastic filament 11 that are in contact with the inner wall of the mold melt. The elastic filament 11 in the gaps inside the mold also melts due to the high temperature surface layer (especially by injecting water vapor for heating). Then, the pressure is applied by the top cover, and the melted parts of the outer periphery of the elastic filament 11 connect with each other to form a thermoplastic layer 2 that wraps around the inner elastic filament 11. At this time, the thermoplastic layer 2 is formed by re-thermoplasticizing the foamed material of the elastic filament 11 to form a high-density material, which wraps around the entire elastic filament 11 to form a high-strength network skeleton, forming a solid shape by bonding and plasticizing the outer surface pattern. (The gaps in the thermoplastic layer will disappear or shrink depending on the degree of heat melting and compression.) The gaps inside the coil shrink due to the degree of compression, or the surface of the elastic filament 11 melts and bonds or disappears, and a high-strength skeleton is also formed inside, increasing elasticity, reducing density, and enhancing physical properties.

[0056] Both of the above-described embodiments of the loop insole 100 include elastic yarns 11 made of foam material. The arrangement of the elastic yarns 11 can be designed in any shape as needed, and can be regular or irregular, including warp and weft yarns interlaced and stacked, multi-layer woven stacking, or, to enhance the complexity of the woven structure and improve mechanical properties, can be sprayed at an angle to form triangles or other polygons. At the same time, the shape of the elastic yarns 11 can also be designed and controlled, and can be curved or straight. All of the above-mentioned shapes and arrangements can be combined and designed in any way, and can all result in a hollow, breathable, and low-density elastic yarn 11 structure.

[0057] Both of the above methods require cutting the elastic filament 11 structure before implementation. However, cutting the elastic filament 11 structure results in an unsightly appearance, and the connection between some of the elastic filaments 11 at the cut is severed, easily causing tears. Furthermore, insufficient bonding area between the upper and lower surfaces makes it prone to separation from other layers. The hollowed-out surface of the elastic filament 11 not only makes it difficult to bond with other shoe materials but also results in a lack of firm shape and deformation. Cutting the loop material not only results in a poor appearance but also makes it easy to tear. Because current technology only allows for one thickness of material per loop, it is impossible to directly produce shaped products, let alone soles with patterns or shapes. Additionally, the hollowed-out outer layer of the loop material allows sand and dirt to enter, making it difficult to clean. Therefore, hot pressing and injection methods can solve the problems of unsightly cuts and easy tearing. Hot-melt bonding (hot pressing) or encapsulation injection (injection) can both result in a smooth appearance of the molded loop insole 100, without external tears. Because the upper and lower surfaces are formed as a whole after hot melting or injection, the bonding area is increased and the firmness is enhanced. It also solves the problem that the coil material cannot be reshaped, and can produce soles of any shape and with any pattern.

[0058] In both of the above schemes, the coil layer 1 is composed of several elastic filaments 11. When manufacturing the coil layer 1, it can be produced using an irregular spinning method or a regular spinning and weaving method. For example, it can be crisscrossed, horizontally and vertically interwoven, multi-layered and overlapping, warp and weft interwoven, triangular, polygonal, multi-layered or single-layered interwoven (like the Beijing National Stadium, Bird's Nest), or a single layer arranged horizontally or vertically or connected upwards. Furthermore, the spinning can use one or more colors mixed, greatly enriching the color and appearance of the coil foam. Moreover, the elastic filaments 11 can be arbitrarily thick and thin, without restriction. Thicker or denser elastic filaments have smaller gaps, and vice versa. The coil material described in this technology can be produced from foamed or non-foamed materials through a spinning process, or from a large quantity of elastic filaments produced by hot pressing, or from non-foamed coil materials through physical foaming to form foamed coil materials.

[0059] Of course, to enhance the wear resistance and thickness of the insole bottom, the two types of loop insoles 100 mentioned above can also add a wear-resistant layer 3 with higher wear resistance. During manufacturing, a layer of wear-resistant layer 3 (wear-resistant base sheet) can be injected into the bottom of the mold first, or an externally produced wear-resistant base sheet can be placed in, and then the elastic yarn 11 material can be placed in, and finally the covering body 12 can be poured in, so that the wear-resistant layer 3, the elastic yarn 11 and the covering body 12 are integrally formed. Alternatively, an externally produced wear-resistant base sheet can be placed in the mold, and then the loop can be placed in, saving the cost of producing the base sheet and bonding it, thus saving costs.

[0060] Since insoles are typically thinner in the forefoot and thicker in the heel (with different thicknesses), while the elastic filaments 11 have a uniform thickness during molding, one or more layers of elastic filaments 11 can be added to the heel or forefoot of the mold before processing. Then, the insole can be molded using the aforementioned injection or hot pressing method. Alternatively, before or after adding the elastic filaments 11, several foam particles, foam strips, air bladders, or air bladders filled with foam particles can be added to the mold. Finally, the foam particles, foam strips, air bladders, or air bladders filled with foam particles are wrapped around the elastic filaments 11 (at the top, bottom, or any external location) by injection and covering the main body 12. Alternatively, the foam particles or foam strips can be thermally bonded to the elastic filaments 11 using hot pressing. By using the aforementioned foam particles or foam strips, the final thickness of the molded insole can be flexibly adjusted. Of course, both methods can be used simultaneously.

[0061] The two molding methods for the aforementioned loop insoles 100 (hot pressing and injection) are completely different from existing foamed particle or strip material casting methods. The latter involves bonding a large number of tiny foam particles with the casting material, resulting in a loose structure of fine sand particles that relies entirely on the physical properties of the casting material for bonding, similar to a sand-concrete structure, thus exhibiting poor physical properties. In contrast, the elastic filament 11 structure is an integrally molded and bonded structural material, a foamed material with a stable bonding structure. The material itself is entirely interconnected, and hot pressing or injection only alters the outer periphery of the elastic filament 11 structure, similar to pouring cement into a bridge steel frame structure. Its physical properties are a combination of the elastic filament 11 structure and a high-strength outer wall, resulting in stronger elasticity and better physical properties. Furthermore, the material used to cover the main body 12 is smaller, has better physical properties, and lower density.

[0062] Preferably, during the casting of the shoe sole, at least one of the following can be placed inside the mold: an air-filled bladder for increasing elasticity and a light-emitting structure. The light-emitting structure includes a light source and light-emitting powder. The light source is an LED or fiber optic lamp, and the light-emitting powder is at least one of fluorescent powder or color-changing powder. Grooves can be cut into the elastic wire 11, and the light source can be placed in several of these grooves. The light-emitting powder can be placed inside the covering body 12 or the elastic wire 11. Before casting, the covering body 12 can be mixed or a light source such as an LED or fiber optic lamp can be placed inside, and then the remaining steps are performed. In this way, the LED or fiber optic lamp is cast into the transparent covering body 12, making it both waterproof and translucent. Furthermore, the light is diffused throughout the entire loop insole 100, preventing the LED light from being too directional and damaging to the eyes. It is aesthetically pleasing, safe, and waterproof. Since the entire covering body 12 is transparent, and the light is diffused, only one LED is needed to illuminate the entire loop insole 100, saving on the number of LEDs used. The same method can also be used in the hot-pressing method.

[0063] Preferably, a certain amount of fluorescent powder or heat- and light-sensitive color-changing powder can be filled into the elastic filament 11, or a certain amount of fluorescent powder or heat- and light-sensitive color-changing powder can be directly mixed into the transparent non-foamed material used to produce the elastic filament 11 and the covering body 12. The resulting loop insole 100 can absorb light and then emit light, or change color when exposed to light and heat. To save costs, it can also be used in combination with non-luminescent transparent hollow shock-absorbing components. In this way, the luminescent hollow shock-absorbing components are distributed like stars within the transparent loop insole 100, emitting light and providing a good visual effect.

[0064] Preferably, the light source and luminescent powder are combined. Fluorescent powder or color-changing powder is directly mixed into the production material covering the main body 12 and the elastic yarn 11. Then, intermittently emitting LED lights or fiber optic lights are installed inside the loop insole 100. The LED lights emit light intermittently, activating the luminescent powder within the main body 12 and the elastic yarn 11, allowing the entire loop insole 100 to emit light continuously in the dark. Because the luminescent powder needs to absorb light energy before emitting light, and the emitting time is short, the LED lights only need to emit light intermittently (e.g., once every two to five minutes) to intermittently and cyclically activate the luminescent powder, allowing the entire loop insole 100 to emit light continuously. Furthermore, the intermittent emitting of the LED lights saves energy and extends the service life.

[0065] Similarly, before injecting and covering the main body 12 or hot-pressing, elastic wires 11 can be cut to form grooves, and then springs or other shock-absorbing components, or spring shock-absorbing components injected with transparent GEL, or sealed airbags or air cushions filled with several foam particles can be inserted, and then the remaining steps can be performed. After injecting springs at the stress points of the loop insole 100, the rebound force can be increased, and the stability can be enhanced. Moreover, since the entire loop insole 100 is transparent, the loop insole 100 can be clearly seen in appearance. This enhances the attractiveness of the entire loop insole 100 and makes the appearance more beautiful.

[0066] The size, number, and shape of the airbags described in this technology can be flexibly set according to different products. They can be any shape, similar in size to a corn kernel. They can also be strip-shaped tubes of any length, like straws. The tubes can be any shape—straight, curved, or bent into any shape. The cross-section of the tube can be circular, elliptical, rectangular, hexagonal, triangular, square, etc. Alternatively, they can be airbags filled with several foam particles. Foam particle-filled airbags provide support, prevent air leakage, loss of support, or reduced elasticity, and are also lighter. They can also have the color of the foam particles, resulting in a better appearance (e.g., a mixture of multiple colored particles).

[0067] Furthermore, the surfaces of the two types of loop insoles 100 are covered with a protective film to prevent oxidation, hydrolysis, and aging of the loop insoles 100 and to increase adhesion. This protective film is made of TPU material. Before placing the elastic yarn 11, a protective film with a thickness of approximately 0.01-0.5 mm can be adsorbed into the mold cavity, so that a thin protective film adheres to the outer surface of the loop insoles 100 after molding. The protective film is integrally formed with the covering body 12, sealing and locking the loop layer 1. Even if the loop layer 1 and the covering body 12 have poor adhesion, the loop layer 1 can be sealed and wrapped to enhance mechanical properties. It also allows the loop layer 1 or the covering body 12 to better bond and adhere through the TPU film, thus enhancing physical properties. External materials only need to be bonded to the TPU film to adhere to the loop insoles 100, avoiding the problem of the covering body 12 or the loop layer 1 being unable to adhere to other materials. The film can be transparent, printed with various patterns or designs, reflective, luminescent, or color-changing. This increases the product's brightness, enhances overall tensile strength and adhesion, alters the product's appearance and patterns, and effectively prevents the coiled insole 100 from contacting air and water, improving its antioxidant, hydrolysis, and anti-aging properties.

[0068] This coiled insole 100 is processed using hot pressing and injection molding methods. Both methods allow the coiled material to be thermoplasticized or injection molded into a single piece. Both methods can eliminate or reduce surface voids in the coil (surface voids will shrink or disappear depending on the degree of compression and heat melting; larger voids will disappear, smaller voids will shrink). This solves the problem that coiled material cannot be reprocessed into soles of a certain shape. It also solves the problems of easy tearing of the elastic yarn 11 after the coil is cut, poor support, poor stability, inability to fit, loose structure, inability to fix, and dirt entry. The surface of the coil can be plasticized or injected to produce a sealed, shaped, flat, wear-resistant, and durable outer layer with good physical properties. It can also be molded into soles of any shape and pattern, solving the problem that coils cannot be used to produce soles. The internal gaps between the elastic yarns 11 can be adjusted and reduced according to the compression pressure of the mold cover, or even eliminated. The tightly bonded elastic yarns 11 form a high-strength internal skeleton, improving the physical properties and elasticity of the coil. Another large component cannot be produced using the injection molding and steam hot pressing methods because liquid materials cannot penetrate to the bottom of the material and expel air, and steam cannot penetrate the material to heat it. The coils, with their numerous gaps, solve the problem of water vapor penetration between the main material and the outer layer. Furthermore, the foamed coils have advantages such as low density, good elasticity, good breathability, and good tensile strength, but they lack support, stability, and are prone to hydrolysis and durability. In contrast, the outer layer material (12) has high density, high hardness, good airtightness, waterproofing, good physical properties, and high strength, but it is brittle and difficult to degrade. Combining the two injection molding methods perfectly complements each other's advantages and disadvantages, creating a new material that is lightweight, elastic, durable, biodegradable, strong, and has good mechanical properties—a truly superior product. Essentially, it's a method of altering the structure and properties of the non-foamed outer layer material. Outsoles produced from non-foamed outer layers are heavy, hard, and difficult to degrade; by casting the foamed coils into the outer layer (12), their structures and properties are mutually altered. When the covering body 12 is foamed PU, the coil material, whether foamed or non-foamed, can form breathable PU foam inside and around the coil. This greatly enhances the elasticity, mechanical properties, and breathability of the coil sole. From another perspective, it is essentially an improvement on traditional PU foam soles. Existing PU foam technology has disadvantages such as poor tear strength and poor mechanical properties (especially prone to breaking in winter), while the coil insole 100 perfectly combines the advantages of both, giving the PU sole strong mechanical properties. In addition, when the coil layer 1 is poured into the covering body 12, it can solve the problem of bonding different materials without glue. In existing technologies, only the same material can be poured or hot-pressed together (without glue). Due to the limitations of existing technology, the pouring and the poured material are different materials, thus making it impossible to bond them together as a single piece. The casting of the coil layer 1 solves this problem. The coil layer 1 has numerous interconnected pores, and the entire coil is an integrally bonded whole. The covering body 12 penetrates and self-bonds within the coil, firmly locking and fixing the coil layer 1 (similar to the principle of Velcro). This achieves the purpose of locking, fixing, and firmly adhering even if the two materials cannot be bonded together.The coil is made of a large number of foamed filaments bonded together. The outer layer of the foamed filaments has the best physical properties. When bonded or hot-pressed to the covering body 12, it can form a high-strength internal skeleton. Therefore, it has better mechanical properties, better elasticity, and is more robust than ordinary foamed materials. This technology can be used for shoe soles, insoles, shoe sole accessories, shock absorbers, shoe upper materials, clothing materials, bag materials, running tracks, floor mats, furniture, mattresses, home decoration materials, etc.

[0069] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A loop insole, characterized in that: The device includes a coil layer and a covering body. The coil layer includes several elastic filaments made of foamed or non-foamed material. The elastic filaments are loosely intertwined and bonded together to form a coil, with numerous gaps between adjacent elastic filaments. The covering body wraps around the elastic filaments and fills part of the gaps. The covering body wraps around the outer periphery of the coil, and the inside of the coil is left empty.

2. The loop insole as described in claim 1, characterized in that: When the elastic filament is made of a non-foamed material, the covering body is made of a foamed material or a GEL material.

3. The loop insole as described in claim 1, characterized in that: The elastic filament is made of foamed material, and the covering body can be made of foamed material or non-foamed material. The foamed material can be PU foam; the non-foamed material can be any one of non-foamed PU, RB, silicone, PVC, GEL, TPR, TPU, SEBS, TPE or adhesive.

4. The loop insole as described in claim 1, characterized in that: The surface of the loop insole is covered with a protective film to prevent oxidation, hydrolysis, and aging of the loop insole, as well as to increase adhesion and physical properties. The protective film is made of TPU material.

5. The loop insole as described in claim 1: characterized in that: The covering body is a transparent body.

6. The loop insole as described in claim 1, characterized in that: The loop insole also includes an abrasion-resistant layer for use as a sole, which is bonded to the covering body or thermoplastic layer by heat sealing or bonding.

7. The loop insole as described in claim 1, characterized in that: The coil layer is provided with a number of foamed particles, foamed strips or air bladders, and the covering body or thermoplastic layer covers and bonds the foamed particles, foamed strips or air bladders to the outside of the coil layer.

8. The loop insole as described in claim 1, characterized in that: The loop insole is provided with a functional component, which is at least one of a filling air bladder or a light-emitting structure for increasing elasticity; the light-emitting structure is provided with a light source and light-emitting powder for emitting light, the light source is an LED lamp or an optical fiber lamp, and the light-emitting powder is any one of fluorescent powder or color-changing powder. The light source is disposed in or adhered to the loop insole, and the light-emitting powder may be disposed in the elastic yarn.

9. The insole for use as described in claim 1, processed by injection molding, is characterized in that, The steps are as follows: S1. Cut the elastic wire material to the required size and place the cut elastic wire into the mold cavity; S2. Pour liquid into the mold cavity to coat the main body, allowing it to penetrate into the gaps between the elastic filaments and wrap around the outer periphery of the elastic filaments; S3. Close the mold and apply pressure to solidify and bond several elastic filaments with the covering body into a single unit; S4. After molding, open the mold and remove the scraps.

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