KR200418398Y1 - Fitting type insole - Google Patents

Abstract

       The present invention is a custom insole consisting of the upper layer (20a) made of a synthetic fiber fabric and the intermediate layer (20b) made of a foam layer and the lower layer (20c) made of a mixed resin layer,

       The custom insole is a heat-sensitive film sheet 30 that changes color depending on the temperature is attached to the side bottom of the insole lower layer (20c),

       And the lower layer (20c) relates to a custom insole, characterized in that made of a thermoplastic mixed resin layer that is deformed when the pressure is applied at a deformation temperature, and has a characteristic of hardening in a deformed form after cooling.

       According to the present invention having the above configuration, by attaching the thermally sensitive film sheet to the bottom surface of the lower layer of the customized insole, the color display part of the thermally sensitive film sheet is changed from silver to black at a temperature of 71 ° C., which is an appropriate deformation temperature of the customized insole. The advantage is that it makes it easy to identify the optimal strain temperature for a custom insole.

        Customized, Insole, Thermoplastic Resin, Heat Sensitive Film Sheet, Low Density Polyethylene, Linear Low Density Polyethylene, Ethylene Vinyl Acetate

Description

       Fitting insole {Fitting type insole}

       Figure 1 shows a perspective view of a conventional custom tailored insole.

       Figure 2 shows a perspective view of another conventional custom insole.

       Figure 3 shows a perspective view of a custom insole showing a state in which the heat-sensitive film sheet according to the present invention is attached to the bottom surface of the insole.

       Figure 4 shows a bottom view of a custom insole showing a state in which the heat-sensitive film sheet according to the present invention attached to the bottom surface of the insole.

       Figure 5 shows an enlarged view of the heat-sensitive film sheet attached to the bottom surface of the custom insole according to the present invention.

       Explanation of symbols on the main parts of the drawings

       20: insole 20a: top layer

       20b: middle layer 20c: lower layer

       30: heat sensitive film sheet

       The present invention relates to a custom insole, and more particularly, by attaching a heat-sensitive film sheet to the bottom surface of the bottom layer of the custom insole, anyone can easily determine the appropriate deformation temperature of the custom insole to easily shape the shape of the foot in the insole It relates to a custom insole characterized in that it is made possible.

       In general, the sole of a shoe is divided into an outsole, a mid sole, and an insole. In the case of shoe insoles, although the shape and shape of each person is different from person to person, the flat sole has only a uniform structure.When a new shoe is worn, the sole is not suitable for the sole of the shoe or the inside of the shoe. There were a lot of inconveniences.

       Therefore, in order to solve the above problems, US Patent Publication No. 6,346,210 B1 (August 12, 2002), as shown in Figure 1, the insole 20 is a thin upper blood 21 and a thick pressing foam ( 23), a method of making a customized insole by heating the insole 20 in a microwave oven and then contacting the foot 24 and applying a force in an arrow direction is known, and the Republic of Korea Patent Publication 10-2004-0470905 (registered on Jan. 31, 2005), as shown in Fig. 2, in the custom-made insole to fit the shape and characteristics of each person's foot, weaving layer 11 made of a woven fabric and Under the nonwoven fabric layer 13 and the nonwoven fabric layer 13 laminated on the foam layer 12 and the foam layer 12 formed of an open particle (OPEN CELL TYPE) foam on one surface of the woven layer 11 Hot of thermoplastic resin for supporting the foam layer 12 Custom insoles are known, in which layers 14 are stacked one after another, but in the case of the above patents, custom insoles are suitably deformed when each individual is heated in a dryer or oven to fit a foot into the insole. Since the temperature is unknown, the inconvenience is that the molding operation must be repeated.

       The present invention is a method for improving the above problems, by attaching a thermally sensitive film sheet on the bottom side of the lower layer of the customized insole, anyone color display portion of the thermally sensitive film sheet at a temperature of 71 ℃, the appropriate deformation temperature of the customized insole The purpose of the present invention is to provide a custom insole, which is characterized in that it is easy to identify the appropriate deformation temperature of the custom insole because it is changed from silver to black.

       And the insole of the present invention, the upper layer is a fabric fabric, the middle layer is a foam layer, the lower layer is composed of a mixed resin layer, the lower layer is a low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and ethylene vinyl acetate (EVA) By using one thermoplastic mixed resin, another object is to provide a customized insole, which can be deformed at a temperature of 71 ° C. and solidified into a deformed form while being cooled at room temperature.

       3, 4 and 5, the present invention having the above configuration, the upper layer 20a made of a synthetic fiber fabric and the intermediate layer 20b made of a foam layer and the lower layer 20c made of a mixed resin layer In the custom insole consisting of,

       The custom insole is a heat-sensitive film sheet 30 that changes color depending on the temperature is attached to the side bottom of the insole lower layer (20c),

       The lower layer 20c is deformed when a pressure is applied at a deformation temperature, and is characterized in that the lower layer 20c is formed of a thermoplastic mixed resin layer having a property of hardening in a deformed form after cooling.

       In the present invention, the upper layer 20a is made of a conventional synthetic fabric, and the middle layer 20b is made of a foam layer to absorb shock applied to the insole, and ethylene vinyl acetate (EVA) foam is preferable.

       And the custom insole according to the present invention serves to deform the insole in the lower layer (20c), after raising the temperature of the custom insole up to 71 ℃ contact the soles on the top surface of the insole and apply a load to the bottom layer of the custom insole (20c) The thermoplastic mixed resin layer constituting the step) is molded into the shape of the sole under pressure, and when the temperature of the insole is cooled at room temperature, the shape of the sole is formed in the shape of the sole to maintain its shape. At this time, the identification of the appropriate deformation temperature of the customized insole is identified by the change of the color display portion (L1) of the heat-sensitive film sheet attached to the bottom side of the insole lower layer (20c), the heat-sensitive film sheet 30 at a temperature of 71 ℃ The color of the color display (L1) of the) is changed from silver to black. And the proper deformation temperature of the custom insole is raised to the sole of the upper surface of the insole on the basis of the color change point (L1) of the heat-sensitive film sheet when the load is applied, the custom insole is molded in the shape of the sole As it cools, it hardens. In this case, if the molded insole is inconvenient, it is characterized by re-molding by the above method.

       "Heat-sensitive film sheet" used in the present invention is a film sheet that changes color according to temperature changes, and the heat-sensitive film sheet is used at a constant temperature for a certain time by repeating the property that molecules stick together when the temperature changes. If you leave the color of the film will change. The application of this product is a thin film-type thermometer, and if the thermometer is placed on the forehead for about 15 to 20 seconds, the color of the temperature changes. That is, when the color of the thin film is red, the body temperature is 36 to 37.5 ° C., when the body temperature is 37.6 to 38 ° C., and when blue, the body temperature is 38 ° C. or more.

       Therefore, the customized insole has to raise the temperature of the oven to 90 ℃ in order to meet the temperature sensitive to 71 ℃, the temperature sensitive to the heat-sensitive film sheet 30, when the insole is heated to about 71 ℃ inside the oven, the heat-sensitive film sheet at this time Since the color of the color display unit L1 is changed from silver to black, the user can easily determine the proper temperature at which the insole can be easily deformed with the naked eye.

       The proper deformation temperature of the customized insole in the present invention means 71 ℃ which is the point of time when the temperature of the heat-sensitive film sheet is discolored, the actual temperature of the insole 20 body may vary slightly from the deformation temperature, but the present invention In the reference to the time of discoloration in the heat-sensitive film sheet 30 to the appropriate deformation temperature of the custom insole.

       In the present invention, when the proper deformation temperature of the insole 20 is higher than the temperature range, the surface of the insole is hot, so that the foot cannot be contacted, so that the molding work may be difficult, and if it is lower than the temperature range, the insole Since the thermoplastic mixed resin of the lower layer 20c is not sufficiently heated to reach the heat deformation temperature, there is a fear that the customized insole is not molded.

       On the other hand, the thermoplastic mixed resin used in the present invention uses a thermoplastic mixed resin mainly composed of low density polyethylene (LDPE), linear low density polyethylene (LLDPE) and ethylene vinyl acetate (EVA). It can be deformed and hardened in a deformed state while being cooled at room temperature.

       The mixing ratio of the thermoplastic mixed resin is 38 to 42% by weight of low density polyethylene, 32 to 34% by weight of linear low density polyethylene, 6 to 7% by weight of ethylene vinyl acetate, 1.4 to 2.0% by weight of blowing agent, 2.0 to 2.4% by weight of zinc oxide, and other additives. It is preferable to mix 0.8-1.2 weight% of stearates, 0.8-1.2 weight% of crosslinking agents, 10-12 weight% of fillers, and 5-7 weight% of pigments.

        In the present invention, the thermoplastic mixed resin is preferably mixed 38 to 42% by weight of low density polyethylene, 32 to 34% by weight of linear low density polyethylene and 5 to 7% by weight of ethylene vinyl acetate. When the mixing ratio of the low density polyethylene and the linear low density polyethylene is out of the above mixing range, the proper deformation temperature of the thermoplastic mixed resin is changed, so it may be difficult to determine the deformation time of the customized insole. In addition, the ethylene vinyl acetate is preferably mixed 5 to 7% by weight, the mechanical properties of polyethylene having good mechanical properties at low temperatures and crosslinking at low temperatures within the above mixing range and ethylene vinyl with good mechanical strength at low temperatures but good impact strength The effect of the properties of acetate complementary to each other is good. In the present invention, the addition of ethylene vinyl acetate is because ethylene vinyl acetate has good affinity with nonpolar resins such as low density polyethylene and linear low density polyethylene while complementing the properties of polyethylene.

       And the foaming agent serves to improve the impact resistance by foaming the thermoplastic mixed resin, it is preferable to add 1.4 to 2.0% by weight. If the amount of the blowing agent is less than the above range, the thermoplastic mixed resin may not be sufficiently foamed. If the amount of the blowing agent exceeds the above range, the thermoplastic mixed resin may be over-foamed and the mechanical properties may be lowered. The blowing agent usable in the present invention is preferably azodicarbonamide blowing agent as a conventional blowing agent. However, the decomposition temperature of azodicarbonamide is relatively high as 210 ° C., and it is required to add a decomposition accelerator (active agent) in order to lower the decomposition temperature of the azodicarbonamide blowing agent. Zinc oxide is used as an active agent for lowering the decomposition temperature of azodicarbonamide, and the amount of zinc oxide added is preferably 2.0 to 2.4% by weight. In this way, when zinc oxide is used within the above-described amount of addition, the crosslinking agent can be decomposed simultaneously while lowering unnecessary high decomposition temperature of azodicarbonamide.

       In the present invention, stearic acid salt is preferably 0.8 to 1.2% by weight to coat the foam, and the available stearic acid salt may be selected from the group consisting of zinc stearate, calcium stearate, magnesium stearate, and aluminum stearate. .

       In the present invention, the crosslinking agent is used to crosslink the low density polyethylene and the linear low density polyethylene, and it is preferable to add 0.8 to 1.2% by weight. If the amount is less than the added amount, there is a fear that the crosslinking of the mixed resin does not occur sufficiently. If the amount is exceeded, the size of the cell of the foam is reduced due to the increase in the crosslinking density, thereby reducing the resilience of the foam. There is. It is preferable to use a dicumyl peroxide crosslinking agent as a conventional crosslinking agent which can be used by this invention.

       And the filler is added in the range of 10 to 12% by weight mainly for the purpose of controlling the aging resistance, heat resistance, shrinkage, etc. of the synthetic resin, the filler usable in the present invention is selected from the usual calcium carbonate, titanium dioxide, clay Can be used.

       The pigment used in the present invention is preferably selected according to the needs of the consumer or the needs of the user and added 5 to 7% by weight.

       In the present invention, the temperature of the heat-sensitive film sheet is changed from silver to black at 71 ° C., but when the deformation temperature of the mixed resin is changed by adjusting the mixing ratio of the thermoplastic mixture, the heat sensitive temperature is changed at the changed deformation temperature. You may use a film sheet.

       Hereinafter, the molding method of the custom insole of the present invention is described in detail through the following examples.

       (Examples 1 and 2)

       1. Manufacturing of customized insoles

       According to the blending ratio of Table 1 to prepare a custom insole using a thermoplastic mixed resin.

                                 TABLE 1

order Ingredient Example One 2 One LDPE 38 42 2 LLDPE 34 32 3 EVA 7 6 4 Azodicarbonamide-based blowing agent 2 1.4 5 Zinc oxide 2 2 6 Calcium Stearate One 0.8 7 Dicumyl peroxide One 0.8 8 Filler 10 10 9 Pigment 5 5

                                                          (weight%)

       2. Foot molding test of customized insole

       According to the method below, the foot-forming test of the customized insole manufactured according to the above formulation ratio was performed.

       1) Preheat the oven to 90 ℃ and leave the customized insole in the oven for 2 minutes. When the customized insole reaches 71 ℃, the color display part of the heat sensitive film sheet changes from silver to black. At this time, if the color of the heat-sensitive film sheet does not change even after 2 minutes, continue to heat the custom insole and check every 20 seconds until the color of the heat-sensitive film sheet changes.

       2) When the color indicator of the thermally sensitive film sheet changes from silver to black, remove the heated custom insole from the oven and immediately place it on the bottom of the shoe.

      3) Tie the shoelaces with the heel attached to the back of the shoe so that the sole is completely in contact with the custom insole.

       4) Try custom insole for 2 ~ 3 days and if you need additional deformation, re-form custom insole according to the above method.

       3. Foot molding test result of customized insole

       As a result of testing the samples of Examples 1 and 2 according to the fitting molding test of 1) to 3), Examples 1 and 2 were all in the shape of the foot shape on the insole when the heat-sensitive film sheet was discolored. Molded into. Therefore, the customized insole according to the present invention was able to accurately determine the timing of foot insole molding.

       The customized insole using the heat-sensitive film sheet in the present invention is not necessarily applied only at the above-mentioned deformation temperature, and the film is heat-sensitive at the changed deformation temperature when the deformation temperature of the mixed resin is changed according to the type and the mixing ratio of the mixed resin. Sheets may be used, where the color that varies depending on the type of thermally sensitive film sheet may be different.

       According to the present invention having the above configuration, by attaching the thermally sensitive film sheet to the bottom surface of the lower layer of the customized insole, the color display part of the thermally sensitive film sheet is changed from silver to black at a temperature of 71 ° C., which is an appropriate deformation temperature of the customized insole. The advantage is that it makes it easy to identify the optimal strain temperature for a custom insole.

Claims (3)

       In the customized insole consisting of an upper layer (20a) made of a synthetic fiber fabric, an intermediate layer (20b) made of a foam layer and a lower layer (20c) made of a mixed resin layer,        The custom insole is a heat-sensitive film sheet 30 that changes color depending on the temperature is attached to the side bottom of the insole lower layer (20c),        And the lower layer 20c is deformed when pressure is applied at a deformation temperature, and is made of a thermoplastic mixed resin layer having a property of hardening in a deformed form after cooling.        The method of claim 1,        The thermally sensitive film sheet 30 is a custom insole, characterized in that the color is changed at 71 ℃.        The method of claim 1,        The lower layer is 38 to 42% by weight of low density polyethylene, 32 to 34% by weight of linear low density polyethylene, 6 to 7% by weight of ethylene vinyl acetate, 1.4 to 2.0% by weight of blowing agent, 2.0 to 2.4% by weight of zinc oxide and other additives as stearates 0.8 ~ 1.2% by weight, 0.8-1.2% by weight of crosslinking agent, 10-12% by weight of filler, customized insole, characterized in that 5-7% by weight of the mixture.

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