Patent Application
20210274857
The present invention relates to a non-slip footwear having a cushion separation part, in which a non-slip material is formed on an inner surface and an outer surface of a bottom of a footwear such as a sock, wherein the non-slip material of the inside and the outside are arranged alternately and a cushion separation part is formed therebetween such that maintenance of a non-slip function and prevention of skin injury are smoothly performed.
A foot is a body part for maintaining a balance of a human body and supporting a body weight to absorb an impact and through which numerous blood vessels and nerves pass.
As a unit for protecting the foot, stockings, tights, outer socks, and socks (hereinafter, referred to as a ‘footwear’) are used.
The footwear may have a basic protection function and an additional function such as exercise performance improvement, injury prevention, and foot odor reduction through sweat absorption.
When the general footwears are used, slippage may be generated between an inner surface of the footwear and a sole or between an outer surface of the footwear and an inner surface of a shoe due to a low friction coefficient of fiber materials selected for the footwears.
For example, when a woman wearing the footwear such as stockings and outer socks moves while wearing high heels (shoes) in which a heel is high, a weight is biased to a front side, and a force is concentrated on a toe to generate pain and stiffness in an instep, an ankle, and even a muscle of a thigh, thereby generating pain and fatigue of the foot.
Also, slippage is generated between the stocking and the foot due to the weight and a forward force for each step when walking, and the slippage between the stocking and the foot applies an impact to the toe. This impact is continuously generated during walking.
Also, in case that a rear foot is slipped, as the rear foot is deviated to the outside further when wearing the high heels, the angle may be easily bent, and walking may be unstable to cause an ankle sprain injury.
According to the report of Health Insurance Review and Assessment Service, there were 1.6 million ankle sprain patients in the year of 2010, and the number of the ankle sprain patients was increased to 1.86 million in the year of 2014.
Also, in terms of sports activity such as running and skating, when a wearer changes a speed or a direction or suddenly starts or stops during the sports activity, a phenomenon in which a foot of the wearer is slipped in a sock is generated, and a phenomenon in which the sock is slipped in a shoe is generated.
This phenomenon is generated because a grip capacity is not sufficient between the foot and the sock and between the sock and the shoe.
As described above, shortage of the sufficient grip capacity causes injuries on an ankle or a knee as a sportsman is slipped.
As an effort for preventing injuries caused by the above slippage phenomenon and improving an exercise performance, the applicant of the present invention applies for a patent and registers “Non slip socks for sports” (Korean Patent Registration No. 10-1686547, patent document 1) and “Non slip insole for sports” (Korean Patent Registration No. W-1638404, patent document 2).
The above patent documents 1 and 2 relate to a cross-sectional structure of a material for strengthening a non-slip function in a sock or an insole and a manufacturing method.
However, when a non-slip material suggested in the patent document 1 is applied to all of an inner surface and an outer surface of the sock to maximize a friction force, a limitation of causing an injury on a foot of a wearer is generated by applying an excessive non-slip function as illustrated in
This phenomenon is generated such that when the foot of the wearer and the non-slip material of the sock are not in close contact with each other (when close contact between the sole and the inner non-slip material of the sock and close contact between the inside of the hose and the outer non-slip material of the sock at the same point are performed), a force applied to a skin extremely increases because a weight of the wearer is transferred to the same point when the weight is applied to the corresponding point.
Here, as a non-slip performance of the non-slip material increase, the more force is applied to the skin.
Particularly, since a side skin adjacent to the sole has a weak skin in the foot of the wearer, an injury may be further easily generated.
In addition, the foot may feel foreign body sensation when wearing a sock in which the non-slip material is formed by a method such as coating to protrude at the same point of the outside and the inside of the sock, and the foreign body sensation is changed into pressing sensation as a continuous pressure is applied when wearing for a long time. Here, this foreign body sensation and the pressing sensation further increases as a thickness of the sock decreases to cause sore and fever on the skin of the wearer, which contacts the non-slip material, and even a blister and an injury.
Although Japanese Utility Model Laid-Open No. 3161737 (patent document 3) discloses a configuration in which projections of the inside and the outside of a sock are alternately arranged to restrict the foreign body sensation when wearing caused by installing the non-slip projections, the corresponding document discloses only the foreign body sensation when wearing, but does not disclose a measure for reducing the risk of injury of a wearer by arranging the non-slip material that maximizes a friction force as in the patent documents 1 and 2.
Also, the patent document 3 does not mention about absorption and drainage of sweat generated in the sole of the sock wearer.
When a professional athlete exercises more than a certain level during exercise, generated sweat exceeds a sweat absorption amount of a fiber tissue of the footwear main body, and thus a contact portion between the sock and the sole of the user is wet by the sweat. This may degrade the non-slip function and cause a slippage phenomenon caused by the sweat, thereby degrading the exercise performance.
As described above, the footwear capable of preventing skin injury of the user by arbitrary arranging the non-slip material having a high gripping performance on the footwear and preventing degradation of the non-slip function generated in a drainage state of a large amount of sweat like the patent document 1 registered by the applicant is required to be developed.
(Patent document 1) KR 10-1686547 (2016 Dec. 8)
(Patent document 2) KR 10-1638404 (2016 Jul. 5)
(Patent document 3) JP 3161737 (2010 Aug. 5)
The present invention provides a non-slip footwear having a cushion separation part, which is capable of preventing skin injury by alternately arranging non-slip materials on an inner surface and an outer surface of a sock to prevent an excessive non-slip function that exceeds a proper non-slip function, in order to resolve the above-described limitation of the related art.
More particularly, the cushion separation part that is an area in which the non-slip material is not disposed as the non-slip materials formed on the inside and the outside of a bottom of a sock do not overlap each other on a plane is formed, wherein the cushion separation part of a portion receiving a great load and having a rigid skin such as a toe, a fore foot, a rear foot, and a foot blade has a narrow width, and the cushion separation part of another portion having a weak skin has a wide width to prevent skin injury and maximize an exercise performance.
Specifically, a phenomenon in which the sock is deviated from a surface of an insole is restricted by restricting slippage in a state contacting the insole of a shoe when wearing the shoe as the non-slip material is arranged on an outer surface of a circumference of the bottom of the sock.
In addition, the non-slip material includes a column cell having a tumbling doll shape and a wet-type polyurethane sheet in which a non-slip groove communicating with the column cell is formed, and as the sheet is bonded to a footwear main body through a hot-melt adhesive layer, the footwear main body forms a drainage and stay space of the rest sweat remained after a large amount of sweat generated during exercise is absorbed to prevent degradation of a non-slip function caused by the large amount of sweat and provide comfortable wearing sensation.
Furthermore, sweat introduced to the non-slip material of the inner surface through a punching hole perforated by a needle is smoothly permeated into the non-slip material of the outer surface through the cushion separation part to further smoothly perform the above-described function.
In order to resolve the above problem, a non-slip footwear having a cushion separation part of the present invention, in which an inner surface part 1a contacting a foot of a wearer is formed on a top surface of a bottom of a foot wear main body 1 for accommodating the foot of the wearer and an outer surface part 1b is formed on a bottom surface of the bottom, the non-slip footwear includes: an outer circumferential non-slip part 10 made of a material preventing slippage and formed on a circumference of the outer surface part 1b; a plurality of outer horizontal non-slip parts 20 formed in left and right directions of a sole and a plurality of outer vertical non-slip parts 30 formed in front and rear directions of the sole, which are made of the material preventing slippage in an inner space surrounded by the outer circumferential non-slip part 10; an outer slip part 40 surrounded by the outer horizontal non-slip parts 20 and the outer vertical non-slip parts 30; and an inner non-slip part 60 made of the material preventing slippage and disposed in the outer slip part 40 on a plane while forming a cushion separation part 50 that is a space spaced apart from the outer horizontal non-slip parts 20 and the outer vertical non-slip parts 30, which are adjacent to each other on the plane. Here, the inner non-slip part 60 includes a first inner non-slip part 61 formed in correspondence to any one position of a toe, a fore foot, a rear foot, and a foot blade of a user and a second inner non-slip part 62 formed on a portion except fro the first inner non-slip part 61, and the cushion separation part 50 of the first inner non-slip part 61 is less in size than the cushion separation part 50 of the second inner non-slip part 62.
In the above configuration, the cushion separation part 50 of the first inner non-slip part 61 may have a size of 2 mm to 4 mm, and the cushion separation part 50 of the second inner non-slip part 62 may have a size of 5 mm to W mm.
Also, each of the outer circumferential non-slip part 10, the outer horizontal non-slip part 20, and the outer vertical non-slip part 30 may be bonded to the footwear main body 1 through a hot-melt adhesive layer 73, and each of the inner non-slip part 60, the outer circumferential non-slip part 10, the outer horizontal non-slip part 20, and the outer vertical non-slip part 30 may be made of a wet-type polyurethane sheet in which a column cell having a reverse tumbling doll shape having a wide top and a narrow bottom is formed therein, and a non-slip groove 72 entirely or partially communicating with a column cell 71 is formed on an opposite surface of a portion contacting the hot-melt adhesive layer 73.
Furthermore, the footwear main body 1 may be made of water permeable cloth in which moisture passes between the inner surface part 1a and the outer surface part 1b.
In addition, a punching hole 80 may be formed in the footwear main body 1 through needle punching treatment from a surface of the cushion separation part 50 to the outer surface part 1b, and as the punching treatment is performed in a state in which liquefied resin is applied on a surface of the needle, the liquefied resin applied on the needle may be stained on a wall surface of the punching hole 80 and then cured to form a resin wall part 81.
According to the present invention, the skin injury may be prevented by preventing the excessive non-slip function that exceeds the proper non-slip function as the material preventing slippage is alternately arranged on the inner surface and the outer surface of the sock.
More particularly, the cushion separation part that is an area in which the non-slip material is not disposed as the non-slip materials formed on the inside and the outside of the bottom of the sock do not overlap each other on the plane is formed, wherein the cushion separation part of the portion receiving a great load and having a rigid skin such as a toe, a fore foot, a rear foot, and a foot blade has a narrow width, and the cushion separation part of another portion having a weak skin has a wide width to prevent the skin injury and maximize the exercise performance.
Specifically, the phenomenon in which the sock is deviated from the surface of the insole is restricted by restricting the slippage in the state contacting the insole of the shoe when wearing the shoe as the non-slip material is arranged on the outer surface of the circumference of the bottom of the sock.
In addition, the non-slip material includes the column cell having the tumbling doll shape and the wet-type polyurethane sheet in which the non-slip groove communicating with the column cell is formed, and as the sheet is bonded to the footwear main body through the hot-melt adhesive layer, the footwear main body forms the drainage and stay space of the rest sweat remained after a large amount of sweat generated during exercise is absorbed to prevent degradation of the non-slip function caused by the large amount of sweat and provide the comfortable wearing sensation.
Furthermore, the sweat introduced to the non-slip material of the inner surface through the punching hole perforated by the needle is smoothly permeated into the non-slip material of the outer surface through the cushion separation part to further smoothly perform the above-described function.
FIG. W is a cross-sectional view illustrating a movement state of sweat according to formation of the punching hole of
The present invention relates to a footwear in which an inner surface part 1a contacting a foot of a wearer is formed on a top surface of a bottom of a footwear main body 1 and an outer surface part 1b is formed on a bottom surface of the bottom as illustrated in
Hereinafter, a non-slip footwear of the present invention will be described in detail with reference to the accompanying drawings.
In the present invention, the footwear main body 1 may be made of various cloths, and more particularly, may be made of a water permeable cloth, which allows moisture to pass between the inner surface part 1a and the outer surface part 1b.
This may be sufficiently achieved by a typical method of securing a space between neighboring wefts and neighboring warps in a weaving process of the wefts and warps using general threads, and typical socks may be made to allow moisture to pass therethrough by using this weaving method.
As illustrated in
Also, an inner non-slip part 60 is formed at the inner surface part 1a.
More particularly, as illustrated in
As illustrated in
Here, although the outer horizontal non-slip part 20 is linearly illustrated in the drawing, the embodiment of the present invention is not limited thereto. For example, the outer horizontal non-slip part 20 may be formed by a combination of various straight lines and curved lines such as a bent shape or a curved shape having a predetermined pitch as long as the plurality of outer horizontal non-slip parts 20 are arranged in parallel to each other.
As illustrated in
Thus, the outer vertical non-slip parts 30 cross the outer horizontal non-slip parts 20, and this crossing configuration forms a zone in the outer surface part 1b, in which the non-slip parts 10, 20, and 30 are not formed, i.e., the outer slip part 40 in which only the footwear main body 1 is exposed to the outside.
Here, the embodiment of the present invention is not limited to the straight line shape of the outer vertical non-slip part 30 like the outer horizontal non-slip part 20. The outer vertical non-slip part 30 may have a combined shape of a curved line and a straight line or a curved line shape.
The outer horizontal non-slip part 20 and the outer vertical non-slip part 30 may be made of the material preventing slippage, i.e., the non-slip material, like the outer circumferential non-slip part 10 and fixed to the footwear main body 1 by the same method such as bonding and coating.
Also, as illustrated in
The inner non-slip parts 60 are independent from each other and arranged in a braille character type.
Here, a portion in the inner surface part 1a except for an area on which the inner non-slip parts 60 is disposed is referred to as an inner slip part 51.
Here, as illustrated in
Particularly, each of the inner non-slip parts 60 has a size less than that of the outer slip part 40, and an outer portion thereof is spaced apart from the outer horizontal non-slip part 20, the outer vertical non-slip part 30, and the outer circumferential non-slip part 10, which are disposed at a circumference of the outer slip part 40.
In the present invention, this spaced portion is referred to as a cushion separation part 50.
The cushion separation part 50 corresponds to a lower area not overlapping the outer circumferential non-slip part 10, the outer horizontal non-slip part 20, and the outer vertical non-slip part 30 on the inner slip part 51.
That is, as illustrated in
In addition, the inner non-slip parts 60 are also made of the material preventing slippage, i.e., the non-slip material, like the above-described non-slip parts 10, 20, and 30 and fixed to the footwear main body 1 by the same method such as bonding and coating.
Furthermore, the inner non-slip parts 60 include a first inner non-slip part 61 and a second inner non-slip part 62 according to positions on the inner surface part 1a.
The first inner non-slip part 61 is formed in correspondence to a position of a toe, a fore foot, a rear foot, and a foot blade of a user, and the second inner non-slip part 62 is formed on a portion except for the first inner non-slip part 61.
Also, the first inner non-slip part 61 is greater in size than the second inner non-slip part 62.
Thus, the cushion separation part 50 around the first inner non-slip part 61 is less in size than the cushion separation part 50 around the second inner non-slip part 62.
Specifically, the cushion separation part 50 around the first inner non-slip part 61 may have a width of 2 mm to 4 mm, and the cushion separation part 50 around the second inner non-slip part 62 may have a width of 5 mm to W mm.
Here, a width a of the cushion separation part 50 represent a distance between an end of the outer slip part 40 to an end of the inner non-slip parts 60, which are positioned at the same position on the plane.
The reason why the width of the cushion separation part 50 is varied according to a portion of the foot is because rigidity of a surface of the foot is varied according to portions, and a force applied to the surface of the foot is varied according to the portions.
That is, since a lower portion of the toe, the fore foot, the rear foot, and the foot blade, on which a friction force and a load are concentrated during movement, have a rigid flesh and an extremely quick exercise ability, the cushion separation part 50 may have a relatively small width, i.e., the first inner non-slip part 61 may have a great size, to focus on maximization of the exercise ability, and on the contrary, in a weak portion except for the above portions, the width thereof may increase to minimize generation of an injury.
Here, the above numerical limitation represents that whether the inner non-slip part 60 and the outer horizontal non-slip part 20, which are adjacent each other, are mutually interfered on a cross-section like
As a result, an experiment, which is performed by using football socks distributed in the market as a main body in a condition in which the width of the cushion separation part 50 is basically greater than 10 mm regardless of portions, exhibits a result of not generating a meaningful increasing feeling in a satisfaction feeling of an exercise performance although skin injury of a wearer is not reported.
On the contrary, when the width of the cushion separation part 50 is less than 5 mm, the experiment exhibits a result in which the weak portions except for the sole, the fore foot, the rear foot, and the foot blade are rubbed and sore although no skin injury is reported in the sole, the fore foot, the rear foot, and the foot blade.
Also, when the width of the cushion separation part 50 is less than 2 mm, the experiment exhibits a result in which even the sole, the fore foot, the rear foot, and the foot blade are rubbed and sore.
On the basis of the above results, it may be known that when the cushion separation part 50 of the first inner non-slip part 61 has a width of 2 mm to 4 mm, and the cushion separation part 50 of the second inner non-slip part 62 has a width of 5 mm to 10 mm, the skin injury may be prevented, and optimized exercise performance may be exhibited.
Although the outer circumferential non-slip part 10, the outer horizontal non-slip part 20, and the outer vertical non-slip part 30 in the above configuration may be made of well-known various non-slip materials, a non-slip material having a structure in which numerous pores are formed between a frame so that moisture is movable therethrough is appropriate.
To this end, an optimum material may be a wet-type polyurethane sheet.
Specifically, the wet-type polyurethane sheet is manufactured by using one of a fabric or a polyester film as a carrier, and then the carrier is removed so that a surface from which the carrier is removed becomes a gripping surface; a non-woven cloth is impregnated and applied to a polyurethane resin, then solidification and de-DMF treatment is performed, and then a surface skin of the manufactured sheet is removed so that a surface from which the surface skin is removed becomes a gripping surface; or a wet-type polyurethane sheet is manufactured by using one of a fabric or a polyester film as a carrier, and then a surface film at an opposite surface of the carrier is removed by a sandpaper so that the surface from which the surface film is removed becomes a gripping surface.
The polyurethane sheet manufactured by the above method has a structure, in which numerous pores are formed therein, external moisture is introducible to a space around the frame, and all or a portion of the introduced moisture is dischargeable to a bottom surface or a wall surface, and form a gripping surface by forming a micro-uneven surface through the above method such as carrier removal, surface skin removal, or sandpaper removal.
The wet-type polyurethane sheet in
The method for forming the above structure may be specifically achieved such that poly-urethane is melted in dimethylformamide and applied on the carrier by comma coating or knife coating, then coagulated by being inputted into a coagulation bath in which a mixed solution of water and dimethylformamide is accommodated, and then a urethane sheet is manufactured by removing the dimethylformamide and removing and drying residual dimethylformamide by hot air, and then the carrier is removed so that a surface from which the carrier is removed becomes the non-slip groove 72.
The above manufacturing method forms a structure in which the tumbling doll shaped column cell 71 is formed in the coagulation process, and the non-slip groove 72 is formed in a process of removing the carrier such as a fabric or a polyester film, and more particularly, a structure in which the surface from which the carrier is removed becomes the non-slip surface, i.e., the gripping surface, to smoothly perform sweat absorption.
Here, since formation of the non-slip groove 72 is unclear according to a material of the carrier, an auxiliary groove of the reference numeral 72a may be additionally formed through a separate surface treatment such as sandpaper treatment.
Bonding of the non-slip material that is described above as an example of the wet-type polyurethane sheet may be bonded through a hot-melt adhesive.
Also, the hot-melt adhesive layer 73 is also formed between the outer vertical non-slip part 30 and the footwear main body 1 and between the outer circumferential non-slip part 10 and the footwear main body 1 in the same manner.
Typically, the hot-melt adhesive is made of a material having a perfect waterproof performance or high waterproof performance such as polyethylene, polyisobutylene, polyamide, or glue.
Also, a total area of the inner non-slip part 60 may be greater than a total sum of areas of the outer circumferential non-slip part 10, the outer horizontal non-slip part 20, and the outer vertical non-slip part 30.
This is because a non-slip function is strengthened as a total area of the portion firstly contacting the sole of the user increases.
However, since the area may not excessively increase, a proper ratio between a total area of the inner non-slip part 60 and the total sum of the areas of the outer circumferential non-slip part 10, the outer horizontal non-slip part 20, and the outer vertical non-slip part 30 may be 1:2 to 3.
An action of the non-slip footwear of the present invention, which is configured as described above, will be described as follows.
As illustrated in the drawings, the inner non-slip part 60 and the outer horizontal non-slip part 20 are alternately arranged from each other when viewed on a side cross-section to form the cushion separation part 50 that is an empty space therebetween.
Although not shown, the inner non-slip part 60 and the outer vertical non-slip part 30 may have the same arrangement state.
The sole of the user presses the inner surface part 1a in a state of
Since the lower portion of the inner non-slip part 60 is simply a fibrous tissue of the footwear main body 1 instead of being made of the same material, a compressive load and a friction force applied to the inner non-slip part 60 serves as slip having a relatively much less non-slip function to reduce friction.
This is obtained such that the friction is primarily reduced by the inner non-slip part 60, the friction force and the load are secondarily distributed while passing the cushion separation part that is an alternate point therearound, and the adjacent outer horizontal non-slip part 20 transmits the friction force and the load to the lower portion of the shoes, instead of using a method of reducing friction concentrically at one point, so as to prevent skin injury or the like caused by concentrically applying the non-slip function to the foot of the wearer and enhancing the exercise performance.
When the cushion separation part 50 is not existed, i.e., when the inner non-slip part 60 and the outer horizontal non-slip part 20 are alternately arranged, the inner non-slip part 60 and the outer horizontal non-slip part 20 may be arranged equally at a specific one point on a vertical line occasionally according to movement such as own elasticity of the footwear main body 1, and the load and the friction force are directly transmitted to this point to cause skin injury of the user.
The cushion separation part 50 serves to absorb moisture, activate drainage, and form a temporary storage space as well as restrict the load and the friction force from being simply transmitted in a direct downward direction.
Firstly, the inner non-slip part 60 absorbs sweat drained from a foot 2 of the wearer because the column cell 11 and the non-slip groove 12 are formed.
Here, since the hot-melt adhesive 73 is typically made of a material that is almost waterproof, sweat absorption is delayed in the hot-melt adhesive 13, and sweat moves through a sidewall surface of the inner non-slip part 60 when the sweat is continuously generated.
This portion consists of the cushion separation part 50 spaced between the inner non-slip part 60 and the outer horizontal non-slip part 20, and an upper drainage space 90 that is an empty space between the foot 2 of the user and the footwear main body 1 generated by cross-section variation of a wave shape of the footwear main body 1 is formed in this portion as illustrated in the drawing, so that a small amount of sweat temporarily stay therein.
In addition, when the footwear main body 1 is made of a cloth that is a water permeable material having a sweat absorption and drainage function like a typical sport socks as described above, this sweat is absorbed to the footwear main body 1.
When sweat is continuously generated in this state, the sweat (moisture) is heading to a bottom surface of the shoe 3. Here, sweat absorption is blocked by the hot-melt adhesive layer 73 in an area in which the outer horizontal non-slip part 20 is bonded to the outer surface part 1b of the footwear main body 1, the sweat moves through the cushion separation part 50 outside the hot-melt adhesive layer 73, and then moisture is temporarily stored in a lower stay space 71 that is an empty space around the sidewall surface of the outer horizontal non-slip part 20.
This is generated such that the lower portion of the footwear main body 1 is supported by the shoe 3 or a surface of an insole, and the lower stay space 71 that is an empty space is formed in a side surface of the sidewall surface of the outer horizontal non-slip part 20 as the inner non-slip part 60 and the outer horizontal non-slip part 2 are alternately arranged and the footwear main body 1 is deformed into the wave shape as illustrated.
In this state, moisture stored in the lower stay space 71 is absorbed to the sidewall surface of the outer horizontal non-slip part 20 or the column cell 21 inside the outer horizontal non-slip part 20 through a gap between the bottom surface of the shoe 2 and an end of the outer horizontal non-slip part 20.
This configuration allows the inner non-slip part 60 and the outer non-slip parts 10, 20, and 30 to sufficiently keep sweat and smoothly drain the sweat of the footwear main body 1 and performs temporary storing of moisture through forming a temporary stay space of the moisture as the empty space is formed according to the wave shape deformation of the footwear main body 1 caused by load pressing.
Here, moisture absorption in the footwear main body 1 may be maximally delayed by smoothly moving the moisture from the upper drainage space 90 to the lower stay space 91 through the cushion separation part 50.
This moisture absorption delay of the footwear main body 1 may increase a wearing feeling to the user and maximally delay a wet state of the upper surface of the inner non-slip part 20 and a surface of the inner slip part 51 that is the rest area to maximally restrict water membrane formation on the surface of the inner non-slip part 20, thereby maximally maintaining the non-slip function.
A detailed method for this is illustrated in
Referring to
Here, liquefied resin 120 is supplied from an external storage tank to the resin supply pipe 110.
Although the liquefied resin may include well-known resin such as silicon resin and polyurethane, fast-setting resin may be preferred.
Here, the needle 100 is disposed above the cushion separation part 50, and as a moving device such as an external press is connected to the needle 100, the needle 100 moves downward and pass through the footwear main body 1 by operation of the press.
Resin supply through the resin supply pipe U0 is performed before or during the needle 100 moves downward, and in this process, the liquefied resin 120 surrounds a surface of the needle 100.
When the needle 100 passes downward through the footwear main body 1, a punching hole 80 is formed according to the passing therethrough, and a resin wall part 81 is formed around the punching hole 80 as the resin 120 is cured.
When the needle 100 is returned after the resin 120 is cured, the hole formed according to the fiber tissue constituting the footwear main body 1 is maintained in an expanded state by the resin wall part 81.
Here, although only punching is performed in the resin 120 through the needle 100 while the needle 100 is not coated, since the typical fiber tissue constituting the footwear main body 1 has elasticity and is easily returned to an original state after punched in a several tensile processes, a feature of forming the resin wall part 81 as described above is preferred.
When the punching hole 80 formed around the resin wall part 81 is formed, as a flow path passing through the footwear main body 1 is formed on the cushion separation part 50, the moisture may be further quickly collected in the lower stay space 91 to provide a comfortable wearing feeling to the wearer.
The non-slip footwear of the present invention may be applied to various clothes surrounding and protecting the foot of the wearer such as all sorts of sports, climbing socks, tights, outer socks, and ordinary socks.
| Number | Date | Country | Kind |
|---|---|---|---|
| 10-2018-0083908 | Jul 2018 | KR | national |
| Filing Document | Filing Date | Country | Kind |
|---|---|---|---|
| PCT/KR2019/007962 | 7/1/2019 | WO | 00 |
