Abstract: An attachable/detachable toecap coupled to the front of the work shoes is disclosed. The attachable/detachable toecap coupled to the front of the work shoe comprises a top plate formed to cover toes and a portion of top of a foot; a side plate formed to extend downwards from the side of the top plate and to surround the top plate; a bottom plate formed to be under the side plate and to cover the bottom of the front of the work shoe; and an anti-separation means for preventing separation of the toecap from the work shoes, wherein the anti-separation means further comprises coupling blocks protruding from the bottom of the work shoe and coupling grooves formed to have vertical perforations at the position corresponding to the coupling blocks, so that the coupling blocks are snap-fitted to prevent the separation of the toecap from the work shoe.

Abstract: The lightweight footwear of the present invention maintains excellent durability and improves heat resistance, so that contraction percentage due to a change with the passage of time is significantly low, rarely causing deformation, and thus, the lightweight footwear may be used in a high temperature and sanitary environment. In addition, the present invention solves the problem of the occurrence of premature foaming due to injection molding and a pattern on the appearance due to dispersion failure, thereby facilitating injection molding.

Abstract: Disclosed are shoes including a body having a foot insertion space into which user's foot is inserted, an air passage portion protruding from a front of the body to the outside and extending in a direction in which the body extends, and a foot support portion located in a width direction of the air passage portion.

Abstract: The lightweight footwear of the present invention maintains excellent durability and improves heat resistance, so that contraction percentage due to a change with the passage of time is significantly low, rarely causing deformation, and thus, the lightweight footwear may be used in a high temperature and sanitary environment. In addition, the present invention solves the problem of the occurrence of premature foaming due to injection molding and a pattern on the appearance due to dispersion failure, thereby facilitating injection molding.

Abstract: A shoe (2) having an air-permeable tongue, according to the present invention, comprises: a tongue outer cover (131) having a plurality of vent holes (135); a tongue inner cover (133) provided under the tongue outer cover (131); and a spacer structure (132) having a main body part (132b) fitted between the tongue outer cover (131) and the tongue inner cover (133), and a wing part (132a) extending from the main body part (132b) toward the front of the shoe so as to be positioned under a vamp (140), which is an upper forming the front portion of the shoe. The spacer structure (132) comprises: an air-permeable part (132-1) upwardly formed from the wing part (132a); an air-permeable part (132-3) downwardly formed from the main body part (132b); and a space passage (132-2) formed in the wing part (132a) and the main body part (132b) so as to enable air to pass between the wing part (132a) and the main body part (132b).

Abstract: A lightweight helmet according to an embodiment of the present invention may have a fiber sheet layer formed of a reinforced fiber, and a porous foamed plastic layer thermally bonded and formed on one surface or both surfaces of the fiber sheet layer, and the fiber sheet layer and the porous foamed plastic layer may be alternatingly formed in duplicate or more.

Abstract: Methods are disclosed for manufacturing magnesium carbonate and calcium carbonate, specifically manufacturing refined carbonates such as magnesium carbonate (MgCO3) and calcium carbonate (CaCO3) through processes including electrolysis, carbon dioxide injection, and calcium oxide (CaO) or calcium hydroxide (Ca(OH)2) injection in seawater.

Abstract: Embodiments of the present invention provide a method for constructing a shoe sole. Specifically, among other things, embodiments of the present invention provide a method for constructing a shoe sole including adhering an outsole to a midsole. The outsole is formed from an outsole compound. The outsole compound includes an organic compound, a porous material, and an adhesion enhancer. The organic compound has a boiling point greater than 120° C. The porous material has a, specific surface area greater than two square meters per gram. The organic compound is supported on the porous material The adhesion enhancer eliminates the need for buffing the outsole when forming the outsole from the outsole compound.

Abstract: According to an embodiment of the present disclosure, a lightweight shoe comprises an outsole and a vamp attached or sewn to the outsole to cover a foot, wherein the vamp includes a foam member and a fiber layer to surround the foam member.

Abstract: A reinforcing apparatus for a double hull vessel including outer and inner shell platings comprises ropes coupled to the inside of the outer shell plating so as to interconnect a bow and a stern of the vessel in a horizontal direction. The reinforcing apparatus for a double hull vessel includes ropes coupled to the inside of an outer shell plating so as to interconnect a bow and a stern of a vessel in a horizontal direction so that when a concentrated load is applied to the vessel during navigation of the vessel due to an external impact such as a collision between a reef or a ship and the vessel to cause a crack occur on the outer shell plating of the hull, the vessel can be supported in a horizontal direction perpendicular to a load application direction of the vessel, thereby effectively preventing the grown of the crack.

Abstract: Methods are disclosed for manufacturing magnesium carbonate and calcium carbonate, specifically manufacturing refined carbonates such as magnesium carbonate (MgCO3) and calcium carbonate (CaCO3) through processes including electrolysis, carbon dioxide injection, and calcium oxide (CaO) or calcium hydroxide (Ca(OH)2) injection in seawater.

Abstract: Embodiments of the present invention provide a method for constructing a shoe outsole. Specifically, among other things, embodiments of the present invention provide a laminated composite used to construct a climbing shoe outsole. The laminate composite includes distinctive lower and upper layers. The lower layer includes butyl rubber. The upper layer includes a general-purpose rubber and a visibility additive. The shoe outsole is formed from the laminated composite. The visibility additive is used to make each layer visually distinctive.

Abstract: Embodiments of the present invention provide an agent composition for improving the machinability of a polymer modifier. Specifically, among other things, embodiments of the present invention provide an agent composition which includes a lubricant and ceramic. In one example, 5 to 50 parts by weight of lubricant and 10 to 50 parts by weight of ceramic may be used with respect to 100 parts by weight of polymer modifier.

Abstract: Embodiments of the present invention provide a method for constructing a shoe sole. Specifically, among other things, embodiments of the present invention provide a method for constructing a shoe sole including adhering an outsole to a midsole. The outsole is formed from an outsole compound. The outsole compound may include an organic compound and a porous material. The organic compound may have a boiling point greater than 120° C. The porous material may have a specific surface area greater than two square meters per gram. The organic compound may be supported on the porous material. The outsole is adhered to the midsole using an adhesive that includes an amine group composition.

Abstract: Embodiments of the present invention provide a method for constructing a shoe sole. Specifically, among other things, embodiments of the present invention provide a method for constructing a shoe sole including adhering an outsole to a midsole. The outsole is formed from an outsole compound. The outsole compound includes an organic compound, a porous material, and an adhesion enhancer. The organic compound has a boiling point greater than 120° C. The porous material has a specific surface area greater than two square meters per gram. The organic compound is supported on the porous material. The adhesion enhancer eliminates the need for buffing the outsole when forming the outsole from the outsole compound.

Abstract: A lightweight helmet shell includes an inner shell formed from a porous expanded plastic layer, and an outer shell, in which the outer shell is formed from a compressed fiber sheet having an apparent density of 0.15 to 0.7 g/cc and an impact absorbability of less than 300 G. The lightweight helmet shell has excellent breathability, is lightweight, and has improved impact absorbability.

Abstract: The present invention provides an adhesion enhancer and a polymer composition containing the adhesion enhancer for enhancing the adhesion performance of polymer composition substrates to a primer. The adhesion enhancer of the present invention includes an alcohol, a phenol or another organic compound having a hydroxyl group of the alcohol or phenol and another functional group as supported by a porous material, or a master batch prepared by mixing a polymer with the above organic compound as supported on a porous material. The polymer composition substrate obtained by adding more than 0.5 part by weight of the adhesion enhancer based on 100 parts by weight of the polymer to a normal polymer composition shows good adhesion to a primer having an isocyanate group without a separate process of making a coarse surface of the substrate or an abrasion process using an organic solvent.

Abstract: There is provided a lightweight helmet shell including an inner shell formed from a porous expanded plastic layer, and an outer shell, in which the outer shell is formed from a compressed fiber sheet having an apparent density of 0.15 to 0.7 g/cc and an impact absorbability of less than 300 G. The lightweight helmet shell according to the invention has excellent breathability, is lightweight, and has improved impact absorbability.

Abstract: The present invention provides an adhesion enhancer and a polymer composition containing the adhesion enhancer for enhancing the adhesion performance of polymer composition substrates to a primer. The adhesion enhancer of the present invention includes an alcohol, a phenol or another organic compound having a hydroxyl group of the alcohol or phenol and another functional group as supported by a porous material, or a master batch prepared by mixing a polymer with the above organic compound as supported on a porous material. The polymer composition substrate obtained by adding more than 0.5 part by weight of the adhesion enhancer based on 100 parts by weight of the polymer to a normal polymer composition shows good adhesion to a primer having an isocyanate group without a separate process of making a coarse surface of the substrate or an abrasion process using an organic solvent.