Internal insert and manufacturing method therefor

Abstract

The present invention relates to an internal insert provided on the inner bottom of a shoe, and a manufacturing method therefor and, particularly, to an internal insert and a manufacturing method therefor, in which the internal insert has puncture resistance that enables the protection of the sole of the foot from sharp objects such as nails, while simultaneously maintaining a small thickness to have reduced volume and ensuring flexibility, thus enabling a reduction in shoe weight and an improvement in wearing comfort.

Description

My answer board and its manufacturing method

[0001] The present invention relates to an inner sole provided on the inner bottom of a shoe and a method for manufacturing the same.

[0002] The inner sole is equipped with a footpad to protect the sole from sharp objects such as nails.

[0003] Although the inner sole is used in general shoes, it is usually used in safety shoes used in industrial settings.

[0004] For safety shoes used in industrial settings, there is an industrial safety standard that requires that a nail with a force of 1000 N must not penetrate the inner plate.

[0005] Accordingly, the conventional inner plate was made of metal to have the strength to prevent the safety shoes from being pierced by nails.

[0006] However, the metal inner plate had the problem of being heavy and inflexible, which reduced the user's wearing comfort.

[0007] To address the above issues, recent attempts have been made to increase the flexibility and penetration resistance of the inner lining by laminating multiple layers of fiber material. However, to prevent nail penetration, the inner lining had to be thicker, at least 4.2 to 4.4 mm. Consequently, there were limitations in reducing the volume and weight of the inner lining.

[0008] In addition, as the thickness of the inner plate increases, as shown above, the user's height increases, which raises the center of gravity, causing discomfort to the user.

[0009] [Prior Art Literature]

[0010] [Patent Document]

[0011] (Patent Document 1) Korean Patent Publication No. 10-2016-0009251

[0012] The present invention aims to provide a shoe sole and a method for manufacturing the same, which has penetration resistance that can protect the sole of the foot from sharp objects such as nails, while maintaining a thin thickness to reduce volume and secure flexibility to reduce the weight of the shoe and improve wearing comfort, in order to solve the above problems.

[0013] According to one feature of the present invention, a lining comprises a fiber body; and a reaction layer formed by permeating into the gaps of a woven fabric of the fiber body.

[0014] Additionally, when a nail enters the gap, the reaction layer fills the gap to prevent the gap from widening further.

[0015] In addition, the reaction layer includes at least one component selected from the group consisting of methacrylic acid, acrylic acid, ethyl acrylate, methyl methacrylate, acrylate monomer, acrylic ester copolymer, and acrylate copolymer.

[0016] In addition, it further includes an elastic coating layer formed on the surface of the fiber body.

[0017] According to another feature of the present invention, a sealing plate includes a fiber body; and an elastic coating layer formed on the surface of the fiber body.

[0018] In addition, the elastic coating layer is elastically stretched when a nail pierces the elastic coating layer.

[0019] In addition, the elastic coating layer includes at least one component selected from the group consisting of isocyanate, amine-based polyol, isocyanate, amine-based curing agent, crosslinking agent, polyol, polyurea, polyurethane, rubber, polyamide, and ethylene vinyl acetate.

[0020] In addition, the elastic coating layer is formed in a film form on at least one of the upper and lower surfaces of the fiber body.

[0021] In addition, the fiber bodies are stacked in multiple layers vertically, and further include a bonding layer provided between the multiple fiber bodies to vertically bond the multiple fiber bodies.

[0022] A method for manufacturing a lining plate according to one feature of the present invention comprises: a lamination step of applying a bonding layer between a plurality of fiber bodies and laminating the plurality of fiber bodies vertically; a heat treatment step of heat-treating and bonding the plurality of laminated fiber bodies; and a reaction layer forming step of impregnating the plurality of heat-treated fiber bodies in an impregnation solution to form a reaction layer on the plurality of fiber bodies.

[0023] In addition, the method further includes an elastic coating layer forming step of forming an elastic coating layer on the surface of a plurality of fiber bodies on which the reaction layer is formed.

[0024] A method for manufacturing a lining plate according to another feature of the present invention comprises: a lamination step of applying a bonding layer between a plurality of fiber bodies and laminating the plurality of fiber bodies vertically; a heat treatment step of heat-treating and bonding the laminated plurality of fiber bodies; and an elastic coating layer forming step of forming an elastic coating layer on the surface of the plurality of fiber bodies on which the reaction layer is formed.

[0025] A method for manufacturing a lining board according to another feature of the present invention comprises: a fiber body manufacturing step of manufacturing a plurality of fiber bodies using a reactive yarn having a reactive coating layer formed on a surface; a lamination step of applying a bonding layer between the plurality of fiber bodies and laminating the plurality of fiber bodies vertically; a reaction layer forming step of heat-treating and bonding the plurality of laminated fiber bodies, and melting the reaction coating layer to form a reaction layer on the plurality of fiber bodies; and an elastic coating layer forming step of forming an elastic coating layer on the surfaces of the plurality of fiber bodies having the reaction layers formed thereon.

[0026] In addition, the elastic coating layer is formed by applying a component forming the elastic coating layer in a spray form to at least one of the upper and lower surfaces of the plurality of fiber bodies.

[0027] According to the inner plate of the present invention and the manufacturing method thereof as described above, the following effects are obtained.

[0028] The reaction layer is formed between the gaps in the woven fabric of the fiber body and fills the gaps, so that when a nail enters the gap of the woven fabric, the reaction layer holds the woven fabric so that the gap of the woven fabric does not widen further, thereby preventing the penetration hole from becoming larger.

[0029] The inner sole can prevent nail penetration while maintaining a thin thickness, thereby expanding the space of the shoe and improving user convenience and safety.

[0030] Even if a nail does penetrate the reaction layer, the elastic coating layer blocks it secondarily and prevents it from being penetrated by being tensioned by elastic force, thus preventing nail penetration more safely.

[0031] By forming a reaction layer through heat treatment of a fiber body equipped with a reaction agent, a melted coating layer penetrates deep into the interior of the fiber body, and a reaction layer is evenly formed inside the fiber body, so that the gaps of the inner plate are better filled, the density between the gaps increases, and higher penetration resistance can be achieved.

[0032] Figure 1 is a plan view of an inner plate according to a first embodiment of the present invention.

[0033] Figure 2 is an enlarged plan view of area A of Figure 1.

[0034] Fig. 3 is a cross-sectional view taken along line B-B' of Fig. 1.

[0035] Figure 4 is a plan view showing a state in which the inner plate according to the first embodiment of the present invention is pierced by a nail of a penetration test device.

[0036] Figure 5 is a side view showing a state in which the inner plate according to the first embodiment of the present invention is pierced by a nail of a penetration test device.

[0037] Figure 6 is a flowchart of a method for manufacturing a board according to a first embodiment of the present invention.

[0038] Figure 7 is a plan view of an inner plate according to a second embodiment of the present invention.

[0039] Figure 8 is an enlarged plan view of area C of Figure 7.

[0040] Fig. 9 is a cross-sectional view taken along line D-D' of Fig. 7.

[0041] Figure 10 is a plan view showing a state in which the inner plate according to the second embodiment of the present invention is pierced by a nail of a penetration test device.

[0042] Fig. 11 is a side view showing a state in which the inner plate according to the second embodiment of the present invention is pierced by a nail of a penetration test device.

[0043] Figure 12 is a flowchart of a method for manufacturing an inner plate according to a second embodiment of the present invention.

[0044] Figure 13 is a flowchart of a method for manufacturing an inner plate according to a third embodiment of the present invention.

[0045] Figure 14 is a flowchart of a method for manufacturing an inner plate according to a fourth embodiment of the present invention.

[0046] Figure 15 is a plan view of a conventional inner plate.

[0047] Figure 16 is an enlarged plan view of area E of Figure 15.

[0048] Fig. 17 is a cross-sectional view taken along line F-F' of Fig. 15.

[0049] Figure 18 is a plan view showing a state in which a conventional inner plate is pierced by a nail of a penetration test device.

[0050] Figure 19 is a side view showing a state in which a conventional inner plate is pierced by a nail of a penetration test device.

[0051] The following merely exemplifies the principles of the invention. Therefore, those skilled in the art will be able to implement the principles of the invention and invent various devices within the scope and spirit of the invention, even if not explicitly described or illustrated herein. Furthermore, all conditional terms and embodiments listed herein are expressly intended, in principle, to facilitate understanding of the invention's concepts and should be understood as being solely intended to facilitate understanding and are not intended to be limited to the specifically enumerated embodiments and conditions.

[0052] The above-described purposes, features and advantages will become clearer through the following detailed description with reference to the attached drawings, so that a person having ordinary skill in the art to which the invention pertains can easily practice the technical idea of ​​the invention.

[0053] Embodiments described herein will be described with reference to cross-sectional and / or perspective views, which are ideal illustrative illustrations of the present invention. Therefore, embodiments of the present invention are not limited to the specific forms illustrated, but also encompass variations in form resulting from the manufacturing process.

[0054] An inner plate (10) and a method for manufacturing an inner plate (10) according to a first embodiment of the present invention

[0055] Hereinafter, with reference to FIGS. 1 to 6, the inner plate (10) and the manufacturing method of the inner plate (10) according to the first embodiment of the present invention will be described.

[0056] FIG. 1 is a plan view of an inner plate according to a first embodiment of the present invention, FIG. 2 is an enlarged plan view of area A of FIG. 1, FIG. 3 is a cross-sectional view taken along line B-B' of FIG. 1, FIG. 4 is a plan view showing an inner plate according to a first embodiment of the present invention in a state where it is pierced by a nail of a penetration test device, FIG. 5 is a side view showing an inner plate according to a first embodiment of the present invention in a state where it is pierced by a nail of a penetration test device, and FIG. 6 is a flowchart of a method for manufacturing an inner plate according to a first embodiment of the present invention.

[0057] First, the inner plate (10) according to the first embodiment of the present invention will be described.

[0058] As illustrated in FIGS. 1 to 5, the inner plate (10) according to the first embodiment of the present invention may be configured to include a plurality of fiber bodies (100) that are stacked vertically, a bonding layer (110) provided on the plurality of fiber bodies (100) to vertically bond the plurality of fiber bodies (100), and a reaction layer (200) that is formed by permeating into gaps between the plurality of fiber bodies (100).

[0059] The fiber body (100) may be made of a woven fabric of fiber material and has the shape of the inner sole (10), i.e., the shape of the sole of a shoe.

[0060] The bonding layer (110) is interposed between multiple fiber bodies (100) and has the function of bonding the multiple fiber bodies (100) upward and downward.

[0061] The reaction layer (200) is formed by permeating into the gaps of the woven fabric of multiple fiber bodies (100).

[0062] As described above, as the reaction layer (200) seeps into the gap of the fiber body (100), when the nail (900) enters the gap of the fiber body (100), the reaction layer (200) functions to fill the gap of the fiber body (100) so that the gap of the fiber body (100) does not widen further.

[0063] The reaction layer (200) may include at least one component among methacrylic acid, acrylic acid, ethyl acrylate, methyl methacrylate, acrylate monomers, acrylic ester copolymers, and acrylate copolymers.

[0064] Hereinafter, with reference to FIG. 6, a method for manufacturing an inner plate (10) according to a first embodiment of the present invention will be described.

[0065] As illustrated in FIG. 6, a method for manufacturing a lining plate (10) according to a first embodiment of the present invention may include a lamination step (S10) of applying a bonding layer (110) between a plurality of fiber bodies (100) to laminate the plurality of fiber bodies (100) vertically, a heat treatment step (S20) of heat-treating and bonding the laminated plurality of fiber bodies (100), and a reaction layer forming step (S30) of impregnating the heat-treated plurality of fiber bodies (100) in an impregnation solution to form a reaction layer (200) on the plurality of fiber bodies (100).

[0066] First, the lamination step (S10) is described.

[0067] In the lamination step (S10), a process of applying a bonding layer (110) between a plurality of fiber bodies (100) and laminating the plurality of fiber bodies (100) and the bonding layer (110) vertically is performed.

[0068] The bonding layer (110) may be interposed between multiple fiber bodies (100) in the form of a film, or may be applied in the form of a solid or liquid adhesive.

[0069] The fiber body (100) may be made of a woven fabric made of fiber material.

[0070] The bonding layer (110) is made of a thermoplastic adhesive and can bond multiple fiber bodies (100) by heat treatment.

[0071] The bonding layer (110) can be used to bond multiple fiber bodies (100) by vertically bonding them together using a thermoplastic film-type adhesive such as a hot melt film type adhesive.

[0072] When the lamination step (S10) is completed, the heat treatment step (S20) is performed.

[0073] In the heat treatment step (S20), a process of combining multiple laminated fiber bodies (100) by heat treatment is performed.

[0074] In the heat treatment step (S20), by pressurizing the multiple fiber bodies (100) laminated through the roller and simultaneously spraying hot air, the bonding layer (110) can be melted and the multiple fiber bodies (100) can be firmly bonded vertically.

[0075] In addition, in the heat treatment step (S20), a plurality of laminated fiber bodies (100) having a bonding layer (110) interposed therebetween are heat treated at a temperature of 130°C to 170°C, more preferably at a temperature of 150°C, to bond the plurality of fiber bodies (100) with the bonding layer (110).

[0076] Since the bonding layer (110) is interposed between the plurality of fiber bodies (100) in the lamination step (S10) using a general adhesive rather than a thermoplastic adhesive, the plurality of fiber bodies (100) can already be bonded in the lamination step (S10), and in this case, the heat treatment step (S20) can be performed to further firmly maintain the bonding of the upper and lower bonded fiber bodies (100) by allowing the bonding layer (110) to permeate well into the internal space of the plurality of fiber bodies (100).

[0077] When the heat treatment step (S20) is completed, the reaction layer formation step (S30) is performed.

[0078] In the reaction layer formation step (S30), a process of forming a reaction layer (200) on a plurality of fiber bodies (100) by impregnating a plurality of heat-treated fiber bodies (100) with an impregnation solution is performed.

[0079] In the reaction layer formation step (S30), a plurality of heat-treated fiber bodies (100) are impregnated with an impregnation solution to form a reaction layer (200) on the plurality of fiber bodies (100).

[0080] The impregnating solution may be comprised of a solution comprising an aqueous acrylic polymer.

[0081] For example, the impregnation solution may be composed of at least one component selected from the group consisting of methacrylic acid, acrylic acid, ethyl acrylate, methyl methacrylate, acrylate monomers, acrylic ester copolymers, and acrylate copolymers.

[0082] The impregnation solution permeates into the interior of a plurality of fiber bodies (100) impregnated with the impregnation solution, so that a reaction layer (200) is formed inside the fiber bodies (100).

[0083] The impregnating solution may be formed entirely or partially inside the fiber body (100). The impregnating solution may not penetrate beyond a predetermined depth (e.g., half the depth) of the plurality of laminated fiber bodies (100) due to the viscosity of the impregnating solution, and thus, the reaction layer (200) may be formed only on the surface and inside of the plurality of laminated fiber bodies (100) up to a predetermined depth (e.g., half the depth).

[0084] The reaction layer (200) functions to fill the gap between the fabrics of the fiber body (100). Therefore, as shown in Fig. 2, it can be confirmed that the reaction layer (200) is formed between the fabrics and the gap is filled.

[0085] Additionally, the reaction layer (200) can penetrate into the fabric to improve the mechanical strength of the fabric. In this way, the reaction layer (200) can be formed between and within the fabric.

[0086] When the reaction layer formation step (S30) is completed, the manufacturing of the inner plate (10) according to the first embodiment of the present invention is completed.

[0087] Hereinafter, a comparison is made between the inner plate (10) according to the first embodiment of the present invention and a conventional inner plate (10").

[0088] As shown in FIGS. 15 to 19, in the case of the conventional inner plate (10"), only a bonding layer (110) is provided between a plurality of fiber bodies (100), and since impregnation with an impregnation solution is not performed, unlike the inner plate (10) according to the first embodiment, a reaction layer (200) is not formed.

[0089] Therefore, the conventional inner plate (10") is simply a laminated form in which a plurality of fiber bodies (100) are bonded together by a bonding layer (110).

[0090] In this way, the inner plate (10") is formed simply by laminating the fiber body (100) of the fiber material, and as shown in FIGS. 18 and 19, when the conventional inner plate (10") is pierced by a nail (900) of a penetration test device, the inner plate (10") is penetrated vertically by the tip (910) to form a penetration portion (600"). Therefore, when a sharp object such as a nail (900) pierces a shoe, the inner plate (10") provided inside the shoe may be penetrated, causing injury to the user.

[0091] On the other hand, since the inner plate (10) according to the first embodiment of the present invention has a reaction layer (200) formed between and inside the fabric of the fiber body (100) to fill the gap, as shown in FIGS. 4 and 5, when the conventional inner plate (10) is pierced with a nail (900) of a penetration test device, the inner plate (10) is not penetrated, and only a protrusion (500) that rises upward is formed.

[0092] Therefore, even if a sharp object such as a nail (900) pierces the shoe, the user is not injured because it does not penetrate the inner plate (10) provided inside the shoe.

[0093] The reason the fiber body (100) is pierced by the nail (900) is primarily because the nail (900) penetrates the gap between the woven fabrics of the fiber body (100).

[0094] In addition, when the fiber body (100) is primarily pierced by the nail (900), the tip (910) of the nail (900) further enters the fiber body (100), and as the woven fabric stretches, the body (920) below the tip (910) enters the woven fabric, and as the woven fabric protrudes, the woven fabric is completely pierced from top to bottom.

[0095] In the inner plate (10) according to the first embodiment of the present invention, the reaction layer (200) is formed between the gaps of the woven fabric of the fiber body (100) to fill the gaps, so that when the nail (900) enters the gap of the woven fabric, the reaction layer (200) functions to hold the woven fabric so that the gap of the woven fabric does not widen further.

[0096] That is, the reaction layer (200) reacts to the tip (910) of the nail (900) penetrating the woven fabric and prevents the fabric surrounding the penetration from opening, thereby preventing the penetration hole from becoming larger.

[0097] As described above, the inner sole (10) according to the first embodiment of the present invention, like the conventional inner sole (10), has penetration resistance that prevents nails from penetrating even in a form in which two fiber bodies (100) are laminated. Accordingly, the inner sole (10) can prevent penetration of nails (900) while maintaining a thin thickness, thereby improving the space expansion of shoes and the convenience and safety of the user.

[0098] The fiber body (100) of the aforementioned inner plate (10) may be formed as a single fiber body (100) rather than a multiple-layered form.

[0099] In this case, after impregnating a single fiber body (100) to form a reaction layer (200), the reaction layer (200) can be formed thicker through surface coating.

[0100] As described above, due to the thickness of the thick reaction layer (200), the inner plate (10) having a single fiber body (100) can have penetration resistance that is equal to or stronger than that of the inner plate (10) having multiple fiber bodies (100).

[0101] This is because, although the internal storage capacity of the fiber body (100) to accommodate a solution through impregnation is limited, in the case of surface coating, the thickness can be manufactured as thick as desired, so even a single fiber body (100)-shaped inner plate (10) can have high penetration resistance.

[0102] An inner plate (10') and a method for manufacturing an inner plate (10') according to a second embodiment of the present invention

[0103] Hereinafter, with reference to FIGS. 7 to 12, the inner plate (10') and the manufacturing method of the inner plate (10') according to the second embodiment of the present invention will be described.

[0104] FIG. 7 is a plan view of an inner plate according to a second embodiment of the present invention, FIG. 8 is an enlarged plan view of area C of FIG. 7, FIG. 9 is a cross-sectional view taken along line D-D' of FIG. 7, FIG. 10 is a plan view showing an inner plate according to a second embodiment of the present invention in a state where it is pierced by a nail of a penetration test device, FIG. 11 is a side view showing an inner plate according to a second embodiment of the present invention in a state where it is pierced by a nail of a penetration test device, and FIG. 12 is a flowchart of a method for manufacturing an inner plate according to a second embodiment of the present invention.

[0105] As illustrated in FIGS. 7 to 11, the inner plate (10') according to the second embodiment of the present invention may be configured to include a plurality of fiber bodies (100) that are stacked vertically, a bonding layer (110) provided on the plurality of fiber bodies (100) to stack the plurality of fiber bodies (100) vertically, a reaction layer (200) formed by permeating the plurality of fiber bodies (100), and an elastic coating layer (300) formed on the surface of the plurality of stacked fiber bodies (100).

[0106] The description of the fiber body (100), bonding layer (110), and reaction layer (200) is the same as that of the inner plate (10) according to the first embodiment of the present invention described above, so redundant description is omitted.

[0107] In addition, in the case of the inner plate (10') according to the second embodiment, as described above, the fiber body (100) may be formed of a single fiber body (10) rather than a plurality of fiber bodies.

[0108] An elastic coating layer (300) is formed on the surface of the fiber body (100).

[0109] The elastic coating layer (300) functions to prevent the nail (900) from penetrating the elastic coating layer (300) by causing the elastic coating layer (300) to be elastically tensioned when the nail (900) pierces the elastic coating layer (300).

[0110] The elastic coating layer (300) may be composed of at least one component selected from the group consisting of isocyanates, amine-based polyols, isocyanates, amine-based curatives, crosslinking agents, polyols, polyurea, polyurethane, rubber, polyamide, and ethylene vinyl acetate (EVA).

[0111] The elastic coating layer (300) may be formed in a film form.

[0112] The elastic coating layer (300) can be formed on at least one of the (upper) surface and (lower) surface of a plurality of fiber bodies (100) or a single fiber body (100).

[0113] Of course, it is most preferable in terms of penetration resistance that the elastic coating layer (300) is provided on both the uppermost and lowermost surfaces of multiple fiber bodies (100) or on both the upper and lower surfaces of a single fiber body (100).

[0114] Hereinafter, a method for manufacturing an inner plate (10') according to a second embodiment of the present invention will be described.

[0115] As illustrated in FIG. 12, a method for manufacturing a lining plate (10') according to a second embodiment of the present invention may include a lamination step (S10) of applying a bonding layer (110) between a plurality of fiber bodies (100) to laminate the plurality of fiber bodies (100) vertically, a heat treatment step (S20) of heat-treating and bonding the laminated plurality of fiber bodies (100), a reaction layer forming step (S30) of impregnating the heat-treated plurality of fiber bodies (100) in an impregnation solution to form a reaction layer (200) on the plurality of fiber bodies (100), and an elastic coating layer forming step (S40) of forming an elastic coating layer (300) on the surface of the plurality of fiber bodies (100) on which the reaction layer (200) is formed.

[0116] The lamination step (S10), heat treatment step (S20), and reaction layer formation step (S30) are the same as the manufacturing method of the inner plate (10) according to the first embodiment of the present invention described above, so redundant descriptions are omitted.

[0117] After the reaction layer formation step (S30) is completed, the elastic coating layer formation step (S40) is performed.

[0118] In the elastic coating layer forming step (S40), a process of forming an elastic coating layer (300) on the surface of a plurality of fiber bodies (100) on which a reaction layer (200) is formed is performed.

[0119] The elastic coating layer (300) may be formed on the uppermost surface or the lowermost surface, or both the uppermost surface and the lowermost surface, of the plurality of fiber bodies (100).

[0120] As an example, FIGS. 7 to 11 are based on the case where an elastic coating layer (300) is formed only on the upper surface of a plurality of fiber bodies (100).

[0121] The elastic coating layer (300) may be made of an elastic material and / or an inelastic material that has strong tensile and tearing properties.

[0122] For example, the elastic coating layer (300) may be composed of at least one component selected from the group consisting of isocyanates, amine-based polyols, isocyanates, amine-based curatives, crosslinking agents, polyols, polyurea, polyurethane, rubber, polyamide, and ethylene vinyl acetate (EVA).

[0123] The elastic coating layer (300) can be formed in a film form on at least one of the (top) surface and (bottom) surface of the fiber body (100).

[0124] In contrast, the elastic coating layer (300) can be formed by applying the components forming the elastic coating layer (300) in a spray form to at least one of the upper and lower surfaces of the fiber body (100).

[0125] As above, the elastic coating layer (300) can also be made of a solid-form combination such as a spray having elastic or inelastic properties or a film or sheet having similar properties.

[0126] When the elastic coating layer (300) coats at least one of the surface of the inner plate (10'), i.e., the (upper) surface and the (lower) surface of the fiber body (100), a liquid-type coating agent is used, but a film-type coating agent may be attached to the surface of the inner plate with an adhesive, or a coating film may be bonded to the surface of the inner plate (10') or the fiber body (100) by melting it with heat, etc., to produce an effect similar to that of a liquid coating agent.

[0127] When a nail (900) pierces the inner plate (10'), the elastic coating layer (300) is tensioned, tightly pressing the surrounding fabric to make it adhere tightly, and at the same time, the elastic coating layer (300) itself is tensioned with elastic force. Therefore, since the elastic coating layer (300) is not pierced by the nail (900), the inner plate (10') can be effectively prevented from being penetrated.

[0128] That is, the elastic coating layer (300) prevents the protruding portion of the elastic coating layer (300) from being penetrated when the tip (910) of the nail (900) is protruded outward, even if it penetrates the woven fabric and reaction layer (200) of the fiber body (100), and at the same time, by tightly sealing the lower penetration hole and tightly contacting the surrounding fabrics, the body portion (920) of the nail (900) cannot advance any further, thereby increasing the penetration resistance, and thus serves as the last bastion to prevent the nail (900) from protruding to the upper surface of the inner plate (10').

[0129] In the inner plate (10') according to the second embodiment of the present invention, a reaction layer (200) is formed between the fabrics of the fiber body (100) to fill the gap, and an elastic coating layer (300) is formed on the surface, so that when the conventional inner plate (10') is pierced with a nail (900) of a penetration test device, as shown in FIGS. 10 and 11, the inner plate (10) is not penetrated by the reaction layer (200), and only a protrusion (500) that rises upward due to tension of the elastic coating layer (300) is formed.

[0130] In addition, even if the nail (900) penetrates the reaction layer (200), the elastic coating layer (300) secondarily blocks it and prevents it from being penetrated by being tensioned by elastic force, so that the penetration of the nail (900) can be prevented more safely than in the first embodiment of the present invention.

[0131] As described above, in the case of a shoe equipped with an inner plate (10') according to the second embodiment of the present invention, even if a sharp object such as a nail (900) pierces the shoe, the user is not injured because the object does not penetrate the inner plate (10).

[0132] A method for manufacturing a lining plate and a lining plate according to a third embodiment of the present invention

[0133] Hereinafter, with reference to FIG. 13, a method for manufacturing a lining plate and a lining plate according to a third embodiment of the present invention will be described.

[0134] Figure 13 is a flowchart of a method for manufacturing an inner plate according to a third embodiment of the present invention.

[0135] A lining plate according to a third embodiment of the present invention may be configured to include a plurality of fiber bodies that are stacked vertically, a bonding layer interposed between the plurality of fiber bodies to stack the plurality of fiber bodies vertically, and an elastic coating layer formed on the surface of the plurality of stacked fiber bodies.

[0136] The inner plate according to the third embodiment of the present invention differs from the inner plate (10') according to the second embodiment of the present invention in that it has only an elastic coating layer, without a reaction layer. Therefore, a description of the same configuration is omitted.

[0137] As illustrated in FIG. 13, a method for manufacturing a lining plate according to a third embodiment of the present invention may be configured to include a lamination step (S10) of applying a bonding layer between a plurality of fiber bodies to laminate the plurality of fiber bodies vertically, a heat treatment step of heat-treating the laminated plurality of fiber bodies, and an elastic coating layer forming step (S40) of forming an elastic coating layer (300) on the surface of the plurality of fiber bodies (100).

[0138] The inner plate according to the third embodiment of the present invention differs from the inner plate (10') according to the third embodiment of the present invention described above in that only an elastic coating layer is formed on the surface of the fiber body (100) without a reaction layer (200). Accordingly, the impregnation step (S30) of the inner plate (10') according to the second embodiment of the present invention described above is omitted.

[0139] Although the inner plate according to the third embodiment of the present invention may be disadvantageous in terms of penetration resistance compared to the inner plate (10') according to the second embodiment of the present invention due to the absence of a reaction layer, when a nail penetrates the fiber body, the elastic coating layer is tensioned to prevent the tip of the nail from protruding upward, thereby preventing the user's foot from being injured by the nail.

[0140] Additionally, by increasing the number of layers of fiber bodies instead of having no reaction layer, the protrusion of nails can be prevented.

[0141] For example, if the inner plate (10') according to the second embodiment of the present invention has two fiber bodies (100), a reaction layer (200), and an elastic coating layer (300) to prevent penetration of nails, the inner plate according to the third embodiment of the present invention has three fiber bodies and an elastic coating layer (300), and can prevent nails from penetrating the inner plate without a process of forming a reaction layer even if they are somewhat separated in terms of thickness.

[0142] Method for manufacturing an inner plate according to the fourth embodiment of the present invention

[0143] Hereinafter, with reference to FIG. 14, a method for manufacturing an inner plate according to a fourth embodiment of the present invention will be described.

[0144] Figure 14 is a flowchart of a method for manufacturing an inner plate according to a fourth embodiment of the present invention.

[0145] As illustrated in FIG. 14, a method for manufacturing a lining plate according to a fourth embodiment of the present invention may include a fiber body manufacturing step (S100) of manufacturing a fiber body using a reactive yarn having a reactive coating layer formed on the surface, a lamination step (S200) of applying a bonding layer between a plurality of fiber bodies to laminate the plurality of fiber bodies vertically, a reaction layer forming step (S300) of heat-treating and bonding the laminated plurality of fiber bodies, and melting the reaction coating layer to form a reaction layer on the plurality of fiber bodies, and an elastic coating layer forming step (S400) of forming an elastic coating layer on the surfaces of the plurality of fiber bodies having the reaction layers formed thereon.

[0146] First, the fiber body manufacturing step (S100) is described.

[0147] In the fiber body manufacturing step (S100), a process of manufacturing a fiber body using a reactive yarn having a reactive coating layer formed on the surface is performed.

[0148] The fiber body manufacturing step (S100) creates a reactive yarn in which a reactive coating layer is formed on the surface of the fiber thread.

[0149] The reactive agent can be prepared by impregnating the fiber yarn with an impregnating solution or by coating the fiber yarn with a solution of a reactive component, such as an impregnating solution. In this case, the impregnating solution can be a solution comprising an aqueous acrylic polymer.

[0150] For example, the impregnation solution may be composed of at least one component selected from the group consisting of methacrylic acid, acrylic acid, ethyl acrylate, methyl methacrylate, acrylate monomers, acrylic ester copolymers, and acrylate copolymers.

[0151] As described above, a reactive coating layer is formed on the surface of a fiber yarn impregnated with an impregnating solution or coated with a solution similar to an impregnating solution. A fiber yarn with such a reactive coating layer formed on its surface is called a reactive yarn.

[0152] After the reaction yarn is manufactured, the manufactured reaction yarn is woven to manufacture a fiber body.

[0153] Once the fiber body is manufactured, the fiber body manufacturing step (S100) is completed.

[0154] After the fiber body manufacturing step (S100) is completed, the lamination step (S200) is performed.

[0155] In the lamination step (S200), a process of applying a bonding layer between multiple fiber bodies and laminating multiple fiber bodies vertically is performed.

[0156] The lamination step (S200) applies a bonding layer between multiple fiber bodies to laminate the multiple fiber bodies and the bonding layer vertically.

[0157] The bonding layer may be provided in the form of a film or applied as a solid or liquid adhesive.

[0158] When multiple fiber bodies are laminated by the bonding layer, the lamination step (S200) is completed.

[0159] Unlike the aforementioned, the fiber body may be a single fiber body rather than multiple fiber bodies. In this case, a thick reactive coating layer may be formed on the surface of the fiber threads of the fiber body to ensure that the single fiber body has sufficient penetration resistance.

[0160] After the lamination step (S200) is completed, the reaction layer formation step (S300) is performed.

[0161] In the reaction layer forming step (S300), a process of combining multiple laminated fiber bodies by heat treatment and melting the reaction coating layer to form a reaction layer on the multiple fiber bodies is performed.

[0162] The reaction layer forming step (S300) heat-treats a plurality of laminated fiber bodies with a bonding layer interposed therebetween at a temperature of 130°C to 170°C, more preferably at a temperature of 150°C, thereby bonding the plurality of fiber bodies with the bonding layer. In this case, the bonding layer is made of a thermoplastic adhesive and can bond the plurality of fiber bodies by heat treatment.

[0163] Of course, since the bonding layer is provided between the plurality of fiber bodies in the lamination step (S10) using a general adhesive rather than a thermoplastic adhesive, the plurality of fiber bodies can already be bonded in the lamination step (S200). In this case, the heat treatment step (S20) can be performed to further strengthen the bonding of the upper and lower bonded fiber bodies by allowing the bonding layer to permeate well between the plurality of fiber bodies.

[0164] In addition, as heat treatment is performed at a high temperature in the reaction layer shaping step (S300), the reaction coating layer formed on the reaction yarn melts and seeps between the multiple fiber bodies, and as the temperature decreases, a reaction layer is formed.

[0165] The reaction layer functions to fill the gaps in the fabric of the fiber body.

[0166] In the reaction layer forming step (S300), by pressing a plurality of fiber bodies laminated through a roller and simultaneously spraying hot air, the bonding layer is melted to firmly bond the plurality of fiber bodies vertically and the reaction coating layer of the reaction yarn is melted to create a reaction layer.

[0167] When the reaction layer is formed, the reaction layer formation step (S300) is completed.

[0168] After the reaction layer formation step (S300) is completed, the elastic coating layer formation step (S400) is performed.

[0169] In the elastic coating layer forming step (S400), a process of forming an elastic coating layer on the surface of a plurality of fiber bodies on which a reaction layer is formed is performed.

[0170] The elastic coating layer may be formed on one surface of the plurality of fiber bodies, i.e., either the uppermost surface or the lowermost surface of the plurality of fiber bodies, or may be formed on both the uppermost surface and the lowermost surface.

[0171] The elastic coating layer may be made of elastic and inelastic materials that exhibit strong tensile and tearing properties.

[0172] For example, the elastic coating layer may be composed of at least one component selected from the group consisting of isocyanates, amine-based polyols, isocyanates, amine-based curatives, crosslinking agents, polyols, polyurea, polyurethane, rubber, polyamide, and ethylene vinyl acetate (EVA).

[0173] In contrast, the elastic coating layer can be formed by applying the components forming the elastic coating layer in a spray form to at least one of the upper and lower surfaces of the fiber body.

[0174] As above, the elastic coating layer can also be made of a solid-form combination such as a spray having elastic or inelastic properties or a film or sheet having similar properties.

[0175] When the elastic coating layer coats at least one of the surface of the inner plate, i.e., the (upper) surface and (lower) surface of the fiber body, a liquid coating agent is used, but a film coating agent may be bonded to the surface of the inner plate with an adhesive, or a coating film may be bonded to the surface of the inner plate or the fiber body by melting it with heat, thereby producing an effect similar to that of a liquid coating agent.

[0176] The method for manufacturing a lining plate according to the fourth embodiment of the present invention described above comprises impregnating fiber threads with an impregnation solution to create a reaction yarn, and using this reaction yarn to manufacture a fiber body.

[0177] Therefore, unlike other embodiments, by forming a reaction layer through heat treatment rather than impregnating a plurality of laminated fiber bodies in an impregnation solution, a melted coating layer is deeply permeated into the interior of the fiber bodies, thereby forming a reaction layer evenly within the interior of the fiber bodies.

[0178] Additionally, the gaps between the inner plates are filled better, increasing the density between the gaps, which has the effect of increasing penetration resistance.

[0179] In the method for manufacturing a lining plate according to the fourth embodiment of the present invention described above, the step of forming an elastic coaching layer (S400) may be omitted, and a lining plate composed of a plurality of fiber bodies, a bonding layer interposed between the plurality of fiber bodies, and a reaction layer formed on the plurality of fiber bodies may be manufactured.

[0180] The inner sole (10, 10') according to the first to fourth embodiments of the present invention described above may be manufactured as a separate inner sole, or may be manufactured as an integral part with the insole or midsole.

[0181] To explain in detail, the inner sole (10, 10') can be integrally provided on the lower surface of the upper, can be integrally provided on the midsole, can be integrally provided on the outsole, can be integrally provided on the rubber, can be interposed between the lower surface of the midsole and the upper surface of the outsole, and can be interposed between the lower surface of the upper and the upper surface of the midsole.

[0182] For example, the inner plate (10) according to the first embodiment of the present invention is composed of two fiber bodies (100) each having a thickness of 1.0 to 1.3 mm and a bonding layer (110) having a thickness of 0.1 to 0.3 mm, and since the reaction layer (200) permeates into the inside of the fiber bodies (100) and the bonding layer (110), it has a thickness of about 2.1 to 2.9 mm.

[0183] The inner plate (10') according to the second embodiment of the present invention has an elastic coating layer (300) of 0.1 to 0.3 mm, and thus has a thickness of about 2.2 to 3.2 mm.

[0184] In order to avoid being penetrated by nails, conventional inner plates are made by laminating four or more fiber bodies of 1.0 to 1.3 mm in thickness, and when calculated using the above figures, the conventional inner plates have a thickness of approximately 4.3 to 6.1 mm.

[0185] The inner plate (10) according to the first embodiment of the present invention and the inner plate (10') according to the second embodiment have a protrusion height of about 0.4 to 0.8 mm, which is usually protruded by a nail, so the sum of the protrusion height and the thickness is about 2.5 to 3.7 mm for the inner plate (10) according to the first embodiment and about 2.6 to 4.0 mm for the inner plate (10') according to the second embodiment. Therefore, even when the protrusion height is taken into account, the inner plate (10) according to the first embodiment can be maintained thinner at about 1.8 to 2.4 mm compared to a conventional inner plate, and the inner plate (10') according to the second embodiment can be maintained thinner at about 1.7 to 2.1 mm. Therefore, the inner sole (10, 10') according to the first and second embodiments has a great advantage in securing space inside the shoe compared to the conventional inner sole (10").

[0186] As described above, the present invention has been described with reference to preferred embodiments thereof, but it will be apparent to those skilled in the art that various modifications or variations may be made to the present invention without departing from the spirit and scope of the present invention as set forth in the following claims.

[0187] [Explanation of symbols]

[0188] 10, 10': My answer board

[0189] 10": Conventional answer board

[0190] 100: Fiber body

[0191] 110: Bonding layer

[0192] 200: Reaction layer

[0193] 300: Elastic coating layer

[0194] 500: Protrusion

[0195] 600": Penetration

[0196] 900: Nail

[0197] 910: Advanced

[0198] 920: Body

Claims

1. Fiber body; and A lining comprising a reaction layer formed by permeating into the gaps of the woven fabric of the above fiber body.

2. In paragraph 1, When a nail enters the gap, the reaction layer fills the gap to prevent the gap from widening further.

3. In paragraph 1, The above reaction layer is a refractory plate comprising at least one component selected from the group consisting of methacrylic acid, acrylic acid, ethyl acrylate, methyl methacrylate, acrylate monomer, acrylic ester copolymer, and acrylate copolymer.

4. In paragraph 1, A lining plate further comprising an elastic coating layer formed on the surface of the fiber body.

5. Fiber body; and An inner plate comprising an elastic coating layer formed on the surface of the fiber body.

6. In paragraph 4 or 5, The elastic coating layer is a tensile strength plate in which the elastic coating layer is elastically stretched when a nail pierces the elastic coating layer.

7. In paragraph 4 or 5, The elastic coating layer is a liner comprising at least one component selected from the group consisting of isocyanate, amine-based polyol, isocyanate, amine-based curing agent, crosslinking agent, polyol, polyurea, polyurethane, rubber, polyamide, and ethylene vinyl acetate.

8. In paragraph 4 or 5, The elastic coating layer is formed in a film form on at least one of the upper and lower surfaces of the fiber body.

9. In paragraph 1 or paragraph 5, The above fiber bodies are stacked in multiple layers vertically, An inner plate further comprising a bonding layer provided between the plurality of fiber bodies to vertically bond the plurality of fiber bodies.

10. A lamination step of applying a bonding layer between a plurality of fiber bodies and laminating the plurality of fiber bodies vertically; A heat treatment step of combining the above-mentioned laminated multiple fiber bodies by heat treatment; and A method for manufacturing a heat-resistant plate, comprising a reaction layer forming step of impregnating a plurality of heat-treated fiber bodies with an impregnation solution to form a reaction layer on the plurality of fiber bodies.

11. In paragraph 10, A method for manufacturing a lining plate, further comprising: forming an elastic coating layer on the surface of a plurality of fiber bodies on which the reaction layer is formed.

12. A lamination step of applying a bonding layer between a plurality of fiber bodies and laminating the plurality of fiber bodies vertically; A heat treatment step of combining the above-mentioned laminated multiple fiber bodies by heat treatment; and A method for manufacturing a lining plate, comprising: forming an elastic coating layer on the surface of a plurality of fiber bodies on which the reaction layer is formed; 13. A fiber body manufacturing step of manufacturing a plurality of fiber bodies using a reactive agent having a reactive coating layer formed on the surface; A lamination step of applying a bonding layer between the plurality of fiber bodies and laminating the plurality of fiber bodies vertically; A reaction layer forming step of combining the above-mentioned multiple fiber bodies by heat treatment and melting the reaction coating layer to form a reaction layer on the above-mentioned multiple fiber bodies; and A method for manufacturing a lining, comprising a step of forming an elastic coating layer on the surface of a plurality of fiber bodies on which the reaction layer is formed.

14. In any one of paragraphs 11 to 13, A method for manufacturing a lining plate, wherein the elastic coating layer is formed by applying a component forming the elastic coating layer in a spray form to at least one of the upper and lower surfaces of the plurality of fiber bodies.

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