TW201834572A - Shoe pad composition, shoe pad structure and fabrication method thereof capable of overcoming the issue of stuffiness of the conventional rubber, plastic, or foamed shoe pads - Google Patents

Abstract

The present invention provides a shoe pad composition, a shoe pad structure and a fabrication method thereof, so that a shoe pad fabricated thereof, in which a ventilation structure layer and an elastic structure layer do not include an adhesive bonding material therebetween and the elastic structure layer includes at least one through hole, allows heated air and sweat generated by a user's sole to be removed from an area of the ventilation structure layer corresponding to the through hole to a space formed by the through hole, so as to overcome the issue of stuffiness of the conventional rubber, plastic, or foamed shoe pads.

Description

Insole composition, insole structure and manufacturing method thereof

The invention relates to an insole composition, an insole structure and a manufacturing method thereof, in particular to a breathable insole without an adhesive layer, and manufactured by an in-mold injection method.

There are many types of functional insoles, including air cushion insoles, arch insoles, decompression insoles and deodorant insoles. Regardless of the insole style, most of the demands are directed toward the combination of breathability, perspiration and comfort. And improvement.

The insole support structure made of plastic, rubber, or foam can make the insole supportive and elastic. However, because the conventional technology relies on viscose or other types of adhesive substances, the cloth and the support structure are joined. The adhesion between the cloth and the support structure is blocked by the adhesive material. In this way, the heat and sweat generated by the user while walking will be retained on the soles of the feet. In addition to making the user feel uncomfortable, it may also cause the growth of bacteria and lead to the generation of odors.

Based on the shortcomings of the conventional technology, it is really necessary to propose an improved manufacturing method to solve the problems of the conventional technology. The present invention then proposes an insole composition, an insole structure and a manufacturing method to overcome it.

It is an object of the present invention to provide an insole composition. The finished product made by foaming has the characteristics of light weight, high structural strength and good elasticity.

Another object of the present invention is to provide an insole structure which does not include an adhesive substance between a breathable structure layer and an elastic structure layer, and the elastic structure layer includes at least one perforation. Heat and sweat can be eliminated through the perforations, which solves the problem of airtightness of conventional insoles.

Still another object of the present invention is to provide a method for manufacturing an insole, which is to place a breathable structure in a mold and inject it in a mold, so that a preheated mixture can be directly joined to the breathable structure and simultaneously Foam molding in the mold eliminates the disadvantages of the conventional need to use a bonding substance to join the fabric and the elastic structural layer.

To achieve the above object, the present invention discloses an insole composition, which comprises: a thermoplastic rubber; a white mineral oil; an ethylene / vinyl acetate copolymer; and a physical foaming agent.

In one embodiment of the present invention, it is also disclosed that the weight percentage of the thermoplastic rubber is between 40-50%, the weight percentage of the white mineral oil is between 40-50%, and the weight of the ethylene / vinyl acetate copolymer. The percentage is between 5-10% and the weight percentage of the physical blowing agent is between 5-10%.

In one embodiment of the present invention, it is also disclosed that the thermoplastic rubber is a styrene-butadiene rubber, a polystyrene-polybutadiene-polystyrene block copolymer, or a styrene-ethylene-butene-styrene copolymer. Paragraph copolymer.

In one embodiment of the present invention, it is also disclosed that the white mineral oil is a naphthenic oils or a paraffinic oils.

In addition, the present invention also provides an insole structure including: a breathable structure layer; and an elastic structure layer disposed on one side of the breathable structure layer, the elastic structure layer includes at least one perforation, and the breathable structure layer And the elastic structure layer does not contain an adhesive substance.

In one embodiment of the present invention, it is also disclosed that the breathable structural layer is a woven fabric, a non-woven fabric, a natural fiber, a man-made fiber, a textile fiber or a breathable leather.

In one embodiment of the present invention, it is also disclosed that the material of the breathable structural layer is selected from the group consisting of wool, cotton, silk, linen, and regenerated cellulose or a combination thereof.

In one embodiment of the present invention, it is also disclosed that the elastic structure layer includes: a thermoplastic rubber; a white mineral oil; an ethylene / vinyl acetate copolymer; and a physical foaming agent.

In one embodiment of the present invention, it is also disclosed that the weight percentage of the thermoplastic rubber is between 40-50%, the weight percentage of the white mineral oil is between 40-50%, and the weight of the ethylene / vinyl acetate copolymer. The percentage is between 5-10% and the weight percentage of the physical blowing agent is between 5-10%.

In one embodiment of the present invention, it is also disclosed that the thermoplastic rubber is a styrene-butadiene rubber, a polystyrene-polybutadiene-polystyrene block copolymer, or a styrene-ethylene-butene-styrene copolymer. Paragraph copolymer.

In one embodiment of the present invention, it is also disclosed that the white mineral oil is a naphthenic oils or a paraffinic oils.

The manufacturing method of the insole mentioned above includes the steps of: uniformly mixing a thermoplastic rubber, a white mineral oil, an ethylene / vinyl acetate copolymer and a physical blowing agent to obtain a mixture; preheating the mixture to obtain a Hot mixture; providing a breathable structure in a mold and heating the mold; and injecting the preheating mixture into the mold to join the preheating mixture with the breathable structure, and obtaining an insole after cooling and forming.

In one embodiment of the present invention, it is also disclosed that the weight percentage of the thermoplastic rubber is between 40-50%, the weight percentage of the white mineral oil is between 40-50%, and the weight of the ethylene / vinyl acetate copolymer. The percentage is between 5-10% and the weight percentage of the physical blowing agent is between 5-10%.

In one embodiment of the present invention, it is also disclosed that there is no need to provide an adhesive substance before the step of injecting the preheating mixture into the mold.

In order to have a further understanding and understanding of the features of the present invention and the effects achieved, we would like to provide a better embodiment and a detailed description with the following description:

This embodiment provides an insole composition, an insole structure, and an insole manufacturing method. The insole composition is based on a conventional technology of a fabric and an elastic structural layer, and needs to be bonded to each other through a substance having adhesive properties (for example, adhesive). , Which makes the fabric and the elastic structure layer blocked by the adhesive material, which can not remove the heat and sweat generated by the soles of the feet, which causes the user to feel uncomfortable or odor when walking in shoes; in order to solve the above-mentioned conventional techniques Disadvantages, this embodiment proposes an insole composition, an insole structure and a manufacturing method thereof. The characteristics of this embodiment will be described below:

First, please refer to FIG. 1 and FIG. 2, which are a side view of an embodiment of the present invention and a perspective structural view of an embodiment of the present invention. As shown in FIG. 1, an insole 10 according to this embodiment includes a breathable structure layer 100 and an elastic structure layer 110. The elastic structure layer 110 is disposed on a side of the breathable structure layer 100, as shown in FIG. 2. As shown, the elastic structure layer 110 further includes at least one through hole 111.

In this embodiment, an adhesive substance is not included between the breathable structure layer 100 and the elastic structure layer 110, so that at least one region 101 of the breathable structure layer 100 corresponding to the perforation 111 can be formed with the perforation 111 The space 112 is communicated, so that when a user wears shoes, the heat and sweat generated by the soles of the feet can be transmitted to the space 112 formed by the perforation 111 through the area 101 to achieve the effects of ventilation and perspiration.

In addition, the perforation 111 may be a hexagonal perforation, but the shape of the perforation 111 is not limited to this; the hexagonal type can effectively use the surface space of the elastic structure layer 110 when arranging, so that the perforation 111 is densely arranged. It is lifted before the elastic structure layer 110 provides sufficient supporting force to improve the ventilation effect. In addition, the hexagonal perforation can also improve the shock absorption effect of the elastic structure layer 110, so that the user can generate a cushioning effect when walking. Improve comfort.

As mentioned above, the functional requirements of the insole 10 may be arch insoles, heightened insoles or sports insoles, but not limited thereto.

Next, a method of manufacturing the insole of this embodiment will be described. Please refer to FIG. 3, which is a schematic flowchart of an embodiment of the present invention. As shown in the figure, the manufacturing method of the insole of this embodiment includes the following steps:

Step S20: uniformly mixing a thermoplastic rubber, a white mineral oil, an ethylene / vinyl acetate copolymer and a physical blowing agent to obtain a mixture;

Step S22: preheating the mixture to obtain a preheating mixture;

Step S24: providing a breathable structure in a mold and heating the mold; and

Step S26: Inject the pre-heated mixture into the mold, cause the pre-heated mixture to undergo a foaming reaction on the breathable structure and join with the breathable structure, and obtain an insole after cooling.

As shown in step S20 in the figure, the manufacturing method of the insole of this embodiment is to first uniformly mix the thermoplastic rubber, the white mineral oil, the ethylene / vinyl acetate copolymer, and the physical foaming agent to obtain a mixture. Among them, the thermoplastic rubber has good tensile strength and processability, and may be selected from the group consisting of styrene-butadiene rubber (SBR), polystyrene-polybutadiene-polystyrene block copolymer (SBS ) Or styrene-ethylene-butene-styrene block copolymer (SEBS), preferably styrene-butadiene rubber is used, but not limited to this; the white mineral oil is used to increase the adhesion of the mixture, and It is selected from naphthenic oils or paraffinic oils, but not limited to this; the ethylene / vinyl acetate copolymer (EVA) is used to improve the abrasion resistance of the foamed product, and has a quality Light and high elasticity; and the physical foaming agent may be selected from the group consisting of carbon dioxide foaming agent, hydrochlorofluorocarbon foaming agent, hydrocarbon foaming agent or hydrofluoroalkane foaming agent, but is not limited thereto.

Furthermore, the weight percentage of the thermoplastic rubber is between 40-50%; the weight percentage of the white mineral oil is between 40-50%; and the weight percentage of the ethylene / vinyl acetate copolymer is between 5-10%. And the weight percentage of the physical foaming agent is between 5 and 10%; it can be stirred and mixed by means well known in the technical field, such as mixing with a mechanical stirrer, which is a well-known technology, so it will not be repeated here. .

Next, as shown in step S22 of the figure, the manufacturing method of the insole of this embodiment is to place the mixture obtained in step S20 in an injection molding machine to preheat to obtain the preheated mixture. The preheated temperature is It is only necessary to make the preheating mixture in a molten state, without limiting the temperature range of its preheating.

Before performing step S24, the inside of the mold is cleaned, and then the breathable structure is placed in the mold and the mold is heated to provide the ambient temperature at which the mixture is foamed in step S20, and the heating temperature and steps. The temperature of the preheated mixture of 20 is the same. When the mold is heated to a preset temperature, the preheated mixture obtained in step S24 can be injected into the mold through the injection molding machine.

Wherein, the breathable structural layer may be woven, non-woven, natural fiber, rayon, textile fiber or breathable leather, but not limited thereto; and the material of the breathable structural layer is selected from wool, cotton, silk, linen and recycled The group or combination of cellulose is not limited to this.

Next, in step S26, the preheated mixture is directly injected into the heated mold and uniformly distributed on the air-permeable structure. Since the pre-heated mixture has good adhesion, it is tightly adhered to the air-permeable structure. The foaming reaction is directly performed on the air-permeable structure, and the inner mold is formed according to the shape of the mold. After cooling, the insole is obtained. This is an in-mold injection process.

Among them, since the preheated mixture can be directly adhered to the breathable structure during the in-mold injection process, the manufacturing method of the insole of this embodiment can form the breathable structure and the mixture after foaming without using an adhesive substance. The structures are joined to each other, so as to solve the problem that the insole is not air-permeable due to the blocking between the cloth and the elastic structural layer by the adhesive material such as adhesive.

In the following, a specific embodiment will be used for description, but it is only for illustration and is not intended to limit the implementation of the present invention in other forms.

(1) Raw material preparation

Configure the mixture, and configure the proportion of its raw materials to include 45% thermoplastic styrene-butadiene rubber, 5% EVA, 45% white mineral oil, and 5% physical blowing agent; the mixture obtained after the configuration can be added with an appropriate amount of color material.

(2) In-mold injection molding

Pour the mixture into the injection molding machine to preheat the mixture for use, then arrange and clean the inner mold of the mold, place the breathable structure in the mold flat and heat the mold. After the mold preheating is completed, preheat the mixture through the injection machine the mixture was poured into a mold, the mixture is permeable to the structural foam molding, the finished insole obtained after cooling, and the foam density of the foam is less than 0.6 g / cc (g / cm ^3).

Based on the foregoing, it can be known that the present invention provides an insole composition and a method for manufacturing the insole. The insole composition is manufactured by using the insole mold manufacturing method through an in-mold injection process. The insole composition can be directly adhered to the breathable structure and foam-molded in the mold, so that the breathable structure and the elastic structure can be bonded to each other without using a glue or a kind of adhesive substance, so it is known that the conventional The kind of adhesive substance is blocked between the fabric and the elastic structural layer, which causes the insole to be impermeable. In addition, the insole structure of the present invention also has the characteristics of light weight, high elasticity, high abrasion resistance, etc., which is an application Invention of sex.

However, the above are only preferred embodiments of the present invention, and are not intended to limit the scope of implementation of the present invention. For example, all changes and modifications of the shapes, structures, features, and spirits in accordance with the scope of the patent application for the present invention are made. Shall be included in the scope of patent application of the present invention.

10‧‧‧ insole

100‧‧‧ breathable structural layer

101‧‧‧area

110‧‧‧ elastic structure layer

111‧‧‧perforation

112‧‧‧space

Figure 1: It is a side view of an embodiment of the present invention; Figure 2: It is a three-dimensional structure view of an embodiment of the present invention; and Figure 3: It is a schematic flow chart of an embodiment of the present invention.

Claims (14)

An insole composition comprises: a thermoplastic rubber; a white mineral oil; an ethylene / vinyl acetate copolymer; and a physical foaming agent. The insole composition according to item 1 of the patent application range, wherein the weight percentage of the thermoplastic rubber is between 40-50%, the weight percentage of the white mineral oil is between 40-50%, and the ethylene / vinyl acetate The weight percentage of the copolymer is between 5-10% and the weight percentage of the physical blowing agent is between 5-10%. The insole composition according to item 1 of the application, wherein the thermoplastic rubber is a styrene-butadiene rubber, a polystyrene-polybutadiene-polystyrene block copolymer, or a styrene-ethylene-butene -Styrene block copolymer. The insole composition according to item 1 of the patent application scope, wherein the white mineral oil is a naphthenic oils or a paraffinic oils. An insole structure includes: a breathable structure layer; and an elastic structure layer disposed on one side of the breathable structure layer, the elastic structure layer including at least one perforation; wherein the breathable structure layer and the elastic structure layer There is no adhesion between them. The insole structure according to item 5 of the application, wherein the breathable structure layer is a woven fabric, a non-woven fabric, a natural fiber, a man-made fiber, a textile fiber, or a breathable leather. The insole structure according to item 5 of the scope of patent application, wherein the material of the breathable structure layer is selected from the group consisting of wool, cotton, silk, linen, and regenerated cellulose, or a combination thereof. The insole structure according to item 5 of the application, wherein the elastic structure layer comprises: a thermoplastic rubber; a white mineral oil; an ethylene / vinyl acetate copolymer; and a physical foaming agent. The insole structure according to item 5 of the scope of the patent application, wherein the weight percentage of the thermoplastic rubber is between 40-50%, the weight percentage of the white mineral oil is between 40-50%, and the ethylene / vinyl acetate copolymerization The weight percentage of the material is between 5-10% and the weight percentage of the physical foaming agent is between 5-10%. The insole structure according to item 5 of the application, wherein the thermoplastic rubber is a styrene-butadiene rubber, a polystyrene-polybutadiene-polystyrene block copolymer, or a styrene-ethylene-butene- Styrene block copolymer. The insole structure according to item 5 of the patent application scope, wherein the white mineral oil is a naphthenic oils or a paraffinic oils. A method for manufacturing an insole includes the steps of: uniformly mixing a thermoplastic rubber, a white mineral oil, an ethylene / vinyl acetate copolymer, and a physical blowing agent to obtain a mixture; preheating the mixture to obtain a preheating The mixture; providing a breathable structure in a mold and heating the mold; and injecting the preheating mixture into the mold, so that the preheating mixture undergoes a foaming reaction in the breathable structure and joins with the breathable structure, and after cooling Get an insole. The method for manufacturing an insole according to item 12 of the scope of the patent application, wherein the weight percentage of the thermoplastic rubber is between 40-50%, the weight percentage of the white mineral oil is between 40-50%, and the ethylene / vinyl acetate The weight percentage of the ester copolymer is between 5-10% and the weight percentage of the physical blowing agent is between 5-10%. According to the method for manufacturing an insole according to item 12 of the scope of the patent application, before the step of injecting the preheating mixture into the mold, there is no need to provide an adhesive substance.