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KR-20260067844-A - Heat-reducing footwear and method for manufacturing the same

KR20260067844AKR 20260067844 AKR20260067844 AKR 20260067844AKR-20260067844-A

Abstract

The present invention aims to provide a heat-reducing shoe and a method for manufacturing the same, wherein an inner module of the shoe rapidly conducts heat generated in the sole and toe areas to the instep area, and a radiative cooling film of an outer module prevents external heat from entering the interior while emitting the heat conducted by the heat conducting film as mid-infrared rays in a specific frequency band to lower the internal temperature. The present invention is characterized by comprising, by specific means, an inner layer configured to wrap around the foot in contact with the sole, a heat conducting film superimposed on the outer side of the inner layer to conduct heat generated from the foot and transfer it to the outside, an upper layer composed of a radiative cooling film superimposed on the outer side of the heat conducting film to allow mid-infrared rays emitted by the heat of the foot to pass through and be discharged to the outside, and to block light of wavelengths other than mid-infrared rays from the outside, and a sole attached to the lower part of the upper layer. The present invention is an invention that allows for the expectation of multiple effects, such as keeping the foot cool even in hot weather.

Inventors

  • 배명석

Assignees

  • 배명석

Dates

Publication Date
20260513
Application Date
20241106

Claims (9)

  1. Inner lining (2) configured to wrap around the foot so as to come into contact with the sole; A heat-conducting film (4) superimposed on the outer side of the inner lining (2) to conduct heat generated from the foot and transfer it to the outside; A radiant cooling film (7) superimposed on the outer side of the heat-conducting film (4) to allow mid-infrared rays emitted by the heat of the foot from the heat-conducting film (4) to pass through and be discharged to the outside, and to block light of wavelengths other than mid-infrared rays from the outside; A heat-reducing shoe characterized by including an upper (101) made of and a sole (102) attached to the lower part of the upper (101).
  2. In claim 1; The heat conductive film (4) is, A polymer film layer (41) composed of polyethylene (PE) having high heat resistance and durability; A heat-conducting layer (42) configured such that graphene or carbon nanotubes are uniformly coated on the inside of a polymer film layer (41) to rapidly conduct heat from the foot; A heat-reducing shoe characterized by being made of
  3. In claim 1; A copper mesh (3) configured to be interposed between an inner lining (2) and a heat-conducting film (4) to prevent bacterial growth inside the shoe (100) by providing an antibacterial effect; A bonding layer (43) configured to be interposed between the copper mesh (3) and the heat conductive layer (42) so as to have high bonding strength between the copper mesh (3) and the heat conductive film (4); Heat-reducing shoes characterized by including this additional
  4. In claim 1; The radiative cooling film (7) is, A base film layer (71) composed of a material having high thermal emissivity; A light-reflecting layer (72) made of one or more of aluminum, silver, and titanium dioxide and configured to be applied to the outer side of a base film layer (71) to reflect sunlight excluding mid-infrared rays; A heat-emitting layer (73) formed on the outer side of the light-reflecting layer (72) and made of a material having high transmittance in the mid-infrared region so that mid-infrared rays emitted from the heat-conducting film (4) can pass through; Heat-reducing shoes characterized by including this.
  5. In claim 4; A thermochromic layer (74) superimposed on a heat-emitting layer (73) so as to become transparent when above a predetermined temperature to allow mid-infrared rays emitted by the heat of the foot from the heat-conducting film (4) to pass through and lower the temperature inside the shoe, and to become opaque when below a predetermined temperature to allow mid-infrared rays emitted by the heat of the foot from the heat-conducting film (4) to pass through and keep the inside of the shoe warm; Heat-reducing shoes characterized by including this additional
  6. A step of preparing an inner lining (2) made of polyester material by processing it to wrap around the foot so that the sole of the foot comes into contact with it (S1); A polymer film layer preparation step (S3) of ultrasonically cleaning a polymer film layer (41) made of polyethylene (PE) for 10 minutes each in acetone, isopropyl alcohol (IPA), and DI water, and drying it at 60°C for 30 minutes to remove residual solvent; A thermal conductive layer formation step (S4) of forming a thermal conductive layer (42) by applying a graphene or carbon nanotube solution dissolved in water or ethanol to a polymer film layer (41) and drying it at room temperature for 1 hour or heat treating it at 80 degrees for 1 hour; A base film layer preparation step (S7) in which a base film layer (71) made of polyethylene (PE) is ultrasonically cleaned in acetone, isopropyl alcohol (IPA), and DI water for 10 minutes each, and dried at 60°C for 30 minutes to remove residual solvent; A light-reflecting layer forming step (S8) in which one or more materials selected from aluminum, silver, or titanium dioxide (TiO₂) with a particle size between 100 nanometers and 1 micrometer are mixed for 1 hour using a high-speed mixer or an ultrasonic disperser so as to be evenly dispersed in a polyurethane resin or acrylic resin and a solvent (toluene or ethanol), the mixed material solution is applied to a base film layer (71) by a spray coating or roll coating method, dried at room temperature for 30 minutes to evaporate the solvent, and then heat-treated at 60 degrees for 1 hour to cure the light-reflecting layer (72); A heat-emitting layer forming step (S9) in which one or more materials selected from iron oxide (Fe2O3), zinc oxide (ZnO), and cerium oxide (CeO2), having a particle size between 100 nanometers and 1 micrometer, are mixed for 1 hour using a high-speed mixer or an ultrasonic disperser so that they are evenly dispersed in a polyurethane resin or acrylic resin and a solvent (toluene or ethanol), the mixed material solution is applied to a light-reflecting layer (72) by a spray coating or roll coating method, dried at room temperature for 30 minutes to evaporate the solvent, and then heat-treated at 60 degrees for 1 hour to cure the heat-emitting layer (73); A shoe completion step (S13) in which a heat conductive layer (42) is attached to the outer side of the inner lining (2) in an overlapping manner, a base film layer (71) is combined to the outer side of the heat conductive layer (42) through a sewing and bonding process to form an upper (101), and a sole (102) is prepared and combined to the upper (10); A method for manufacturing a heat-reducing shoe characterized by including
  7. In claim 6; One or more thermochromic dyes selected from polyurethane, melamine-formaldehyde resin, or gelatin are dissolved in an organic solvent (toluene, ethanol) at a solution concentration of 10–20 wt%; the dissolved thermochromic dye solution is emulsified in the aqueous phase to form small droplets; a surfactant is added at a concentration of 0.5–2 wt% and the mixture is stirred for 30 minutes at an emulsification speed of 1,000–2,000 RPM; a polymer precursor (polyurethane) encapsulating the emulsified dye particles is added to the aqueous phase and stirred at a temperature of 50–60°C for 2–4 hours to induce a polymerization reaction; the encapsulated dye particles are recovered by centrifugation or filtration and washed at least three times to remove impurities; the washed microcapsules are dried at 40°C for 12 hours to remove moisture; and the microcapsule content in a polymer matrix (transparent acrylic resin or polyurethane resin) A thermochromic layer formation step (S10) in which a polymer solution, uniformly dispersed to 10~30 wt% and dispersed using an ultrasonic disperser for 1 hour so that the capsules are evenly distributed, is thinly coated onto a heat-emitting layer (73), and the solvent is evaporated by drying at room temperature for 1 hour, or the thermochromic layer (74) is completely cured by heat treatment at 60 degrees for 30 minutes, or the thermochromic layer (74) is cured by irradiating UV light for 5 minutes; A method for manufacturing a heat-reducing shoe characterized by including additional [unclear].
  8. In claim 6; A copper mesh preparation step (S2) in which a copper mesh (3) formed of a mesh having square or hexagonal pores is attached to the outer side of the inner lining (2) by adhesive; An inner module completion step (S5) in which a copper mesh (3) is attached to the inner side of a polymer film layer (41) with a thermally conductive silicone adhesive and cured; A method for manufacturing a heat-reducing shoe characterized by including additional [unclear].
  9. In claim 6; A protective layer forming step (S11) of forming a protective layer (75) by uniformly applying a transparent polyurethane resin or acrylic resin to a thickness of 5 to 10 micrometers on a thermochromic layer (74), drying it at room temperature for 1 hour, and then heat-treating it at 60 degrees for 1 hour to completely cure it; A method for manufacturing a heat-reducing shoe characterized by including additional [unclear].

Description

Heat-reducing footwear and method for manufacturing the same The present invention relates to a shoe that reduces heat sensation and a method for manufacturing the same. More specifically, the invention relates to a shoe and a method for manufacturing the same that effectively manages the heat generated inside the shoe to provide a comfortable environment for the wearer. The biggest problem people experience when wearing shoes is the sensation of heat. A sensation of heat generally causes discomfort and, in severe cases, can even be felt as a form of pain; however, most people tend to ignore it, attributing it to their own physical ailments or the quality of their shoes. Existing shoes have primarily attempted to reduce the sensation of heat in the feet through breathable materials or sweat absorption functions, but these methods have limitations in fundamental heat dissipation and could not resolve the discomfort experienced by users. In particular, the heat generated from the soles of the feet causes sweat and foot odor, which could also cause problems in terms of shoe hygiene. The cause of the sensation of heat is mostly due to heat generated from increased blood flow caused by activity, which accumulates inside the shoe. Therefore, technologies have been developed with the aim of lowering the temperature inside the shoe and alleviating the heat sensation and pain. As disclosed in Korean Registered Patent No. 1096377 (published on December 20, 2011), a technology is disclosed comprising a shoe body having a plurality of ventilation holes in a groove formed inside the sole, a lower part seated on the upper part of the sole and a midsole having a lower part, a mesh part installed in an opening formed in the midsole corresponding to the ventilation holes to form a plurality of ventilation holes in the sole, an opening formed in the midsole installed at a position corresponding to the ventilation holes, and a mesh part installed in the opening so that sweat and odor generated from a foot inserted into the shoe body pass through the mesh part and are discharged to the outside through the ventilation holes. Among other prior art, as disclosed in Korean Registered Patent No. 1544179 (published on August 12, 2015), a midsole body is composed of a forefoot portion, an arch portion, and a rearfoot portion, with ventilation holes formed on both sides between the arch portion and the rearfoot portion, a ventilation space communicating with the ventilation holes is partitioned between the arch portion and the rearfoot portion, and a ventilation passage communicating with the ventilation space is formed from the arch portion to the forefoot portion, and a ventilation member is inserted and installed in each of the ventilation holes of the midsole body to allow the ventilation space and the ventilation passage to communicate with the outside, wherein an independent cushion member is formed in the rearfoot portion of the midsole body, separated from the rearfoot portion by a compression guide groove formed around the rearfoot portion, and when the wearer's load is applied to the independent cushion member due to walking, the independent cushion member is compressed by the load through the empty space created by the compression guide groove, thereby mitigating walking impact. As disclosed in another prior art, Korean Registered Patent No. 2016296 (published on August 30, 2019), the upper insole comprises a space formed at the rear where the wearer's heel is positioned, with a lower opening to accommodate an elastic member, and a suction passage formed at the front interior, having a plurality of suction holes formed at the top; a guide hose that connects the space of the upper insole and the suction passage to guide air sucked into the suction passage to flow into the space; a check valve formed on the guide hose, which allows air flowing into the suction passage to flow into the space, but prevents air in the space from flowing into the suction passage; an elastic member formed in the space of the upper insole, which contracts when the rear of the upper insole is pressurized to discharge air in the space through a discharge means, and expands and restores when the pressurization is released to allow external air to flow into the space through the suction passage; and an elastic member located at the rear of the upper insole, which [acquired] into the space A technology is disclosed comprising a discharge means for discharging air to the outside and a lower seat located at the bottom of the upper seat to close the space and intake passage of the upper seat. However, conventional technologies were insufficient to expel heat generated from the feet to the outside of the shoe, and there was also a problem in that they could not adequately block external heat during hot summers. FIG. 1 is an exemplary illustration of a shoe to which an example of the present invention is applied. FIG. 2 is an exploded view and an enlarged cr