WO2021048915A1 - Skin contact sheet - Google Patents

Abstract

The purpose of the present invention is to provide a novel skin contact sheet having vacuum suction to the skin when under pressing contact, wherein no suction is generated with only light contact, but vacuum suction is exhibited when the skin contacts the sheet surface with at least a certain degree of pressing force; this novel skin contact sheet makes it possible to obtain a surface contact state in which friction (rubbing) due to shifting on the skin during use does not occur.　This skin contact sheet 10, used contacting an area of a person's skin such as the soles of the feet or the palms, is configured using a breathable foam elastic body 11 with open cells (OC) as the primary foam cells; the open cells (OC) of the foam elastic body 11 are configured such that, when the skin in contact therewith presses a portion of the plurality of open cells that open to the front surface 11a on the side pressed by the skin, air passages W from the front surface 11a to the back surface 11b are blocked midway in said open cells, forming vacuum suction holes against the skin in contact therewith.

Description

Skin contact sheet

The present invention relates to a skin contact sheet used for a part of the human body that comes into contact with the skin, such as a skin pad, footwear, and handwear.

When exercising or playing sports, the part where the foot and the shoe come into contact with each other may be rubbed and cause blister or inflammation on the foot, or the impact may be applied to the body through the shoe from the ground or the like, causing fatigue or discomfort.
Similarly, in the case of socks and gloves, there is a problem that blister is formed on the foot or hand due to rubbing between the foot and the sock or between the hand and the glove due to vigorous movement or the like.
Further, when the skin is used in contact with a part of the skin such as a skin pad, there is a problem that the skin rubs against the skin pad and causes inflammation.
As a method for solving the above-mentioned problems, a conventional technique has been provided in which the soles of the feet, the palms, and the like that come into contact with the skin are less likely to be rubbed or inflamed.

Japanese Unexamined Patent Publication No. 2006-37282 International Publication No. 2013/190647 International Publication No. 2019/0388886

Patent Document 1 discloses a sock in which a reinforcing material (2, 3) made of foamed polyurethane is provided on the back side of the sock.
However, what is disclosed in Patent Document 1 can prevent the feet and the like from slipping by providing a non-slip material, but on the other hand, when putting the feet and the like in socks and shoes, There was a problem that the foot could not be smoothly put into shoes or socks due to the non-slip material.

Patent Document 2 is a technique provided by the present inventor as a solution to the problems of the prior art such as Patent Document 1. The structure is such that a good-slip net body (12) is stretched around the non-slip cushion material (11) to ensure ease of wearing, and the contact parts such as feet and hands rub against the fabric. It is designed to prevent (rubbing) and prevent the occurrence of beans and inflammation.
However, in the case of the technique shown in Patent Document 2, since the net body (12) is stretched around the Kyon material (11) and attached, there are the following problems.
First, a sewing step of sewing the net body (12) to the cushion material (11) is required separately. Therefore, a lot of manpower and time are required for production.
Secondly, when the cushion sheet in which the net body (12) is sewn is cut into a foot shape or the like to obtain a product, the net body (12) frays at the cut edge, so such a simple method is adopted. Can not. That is, since the edge portion of the cut net body (12) is easily frayed, it is necessary to cut the cushion material (11) into a product shape in advance, sew the net body (12), and overhang the edge. ..
Thirdly, in order to ensure that the entire net body (12) is in contact with the cushion material (11) on the entire surface, it is necessary to make the sewing seams finer. When the seams of sewing are roughened, the contact surface of the net body (12) with respect to the cushion material (11) becomes rough, and it becomes difficult for the function to be exhibited.

Patent Document 3 is a technique provided by the inventor of the present invention as a solution to the problems of Patent Document 2, and has a first surface (10a) having good slipperiness for contact with a human body portion and a low level with a small step. It is a skin contact sheet (10) composed of a non-slip second surface (10b) composed of. When wearing, the human body part easily slides on the smooth first surface (10a) and is easy to wear, and when pressure is applied thereafter, the human body part comes into contact with the non-slip second surface (10b). Faced and immobilized. When putting your feet and hands in and out of shoes, socks and gloves, you can do this smoothly and effortlessly, and once inserted, the soles and palms are perfectly immobile with respect to your shoes, socks and gloves. Can be contacted with.
However, in the case of the technique shown in Patent Document 3, it is quite difficult to configure the first surface (10a) having good slipperiness and the second surface (10b) having difficulty slipping with a small step by a method other than printing. is there. Further, in the case of printing, the durability of the first surface (10a) having good slipperiness composed of the printing becomes an issue.

Therefore, the present invention solves the above-mentioned problems of the prior art, and an object of the present invention is to provide a new skin contact sheet having vacuum adsorption property to the skin under pressure contact. That is, although adsorption is not generated by simple light contact, when the skin comes into contact with the sheet surface with a certain pressing force, vacuum adsorption is exhibited and friction (rubbing) with the skin occurs during use. An object of the present invention is to provide a new skin contact sheet capable of obtaining a contact state that does not occur. Another object of the present invention is to provide a skin contact sheet as a skin pad that does not cause inflammation or blister due to friction with the skin. Furthermore, when putting your feet or hands in or out of shoes, socks, or gloves, you can insert them without much difficulty, and by applying pressing force after insertion, the soles, palms, or part of your skin will become socks or parts of your skin. It can be perfectly contacted with gloves, skin pads, etc., and is therefore used as part of skin pads, socks, gloves, shoe insoles, and other products to ensure breathability and friction (rubbing). The challenge is to provide a new skin contact sheet that can surely prevent the occurrence of beans and inflammation caused by).

In order to achieve the above object, the skin contact sheet of the present invention is a skin contact sheet used in contact with a part of the skin of the human body such as the sole of the foot and the palm.
The skin contact sheet is constructed by using a breathable foamed elastic body in which open cells are mainly foamed bubbles.
Moreover, the open cells of the foamed elastic body are the above-mentioned by receiving the pressure from the skin in contact with some of the open cells among a large number of open cells that open to the front surface on the side to be pressed by the skin. The first feature is that it is blocked in the middle of the ventilation passage from the front surface to the back surface and is configured to be a vacuum suction hole for the skin in contact with the surface.
Further, in the skin contact sheet of the present invention, in addition to the above-mentioned first feature, a large number of open cells constituting a ventilation passage from the front surface to the back surface of the foamed elastic body are formed with a surface bubble cell that opens on the front surface. It consists of an internal bubble cell inside, a back surface bubble cell on the back surface, and a communication hole that communicates between these bubble cells, and the front surface bubble cell has a total area ratio of 30 to 70% with respect to the front surface. The communication holes dispersed on the surface surface and communicating between the bubble cells are opened in the inner wall of the bubble cell at a total area ratio of 10 to 50% or less with respect to the inner wall of the bubble cell, at least in the vicinity of the surface surface. The second feature is that it is configured in.
Further, in addition to the above-mentioned second feature, the skin contact sheet of the present invention has a third feature that the surface bubble cell is configured to have a cell diameter of several tens to several hundreds of microns. ..
Further, in addition to the above-mentioned first to third features, the skin contact sheet of the present invention has a fourth feature that the surface surface of the foamed elastic body of the skin contact sheet is formed as a smooth smooth surface. It is supposed to be.
Further, in the skin contact sheet of the present invention, in addition to the above-mentioned fourth feature, the smooth smooth surface of the front surface of the foamed elastic body of the skin contact sheet is formed by surface processing or surface printing of the foamed elastic body. Is the fifth feature.
Further, in addition to the above-mentioned first to fifth features, the skin contact sheet of the present invention is characterized by being a skin pad that comes into contact with a part of the skin or a part of the skin pad. It is said.
Further, in addition to the above-mentioned first to fifth features, the skin contact sheet of the present invention has a seventh feature that it is attached to the inner bottom of the sock and becomes a part of the sock.
Further, in addition to the above-mentioned first to fifth features, the skin contact sheet of the present invention has an eighth feature that it is attached to the inner surface of the palm side of the glove and becomes a part of the glove.
Further, in addition to the above-mentioned first to fifth features, the skin contact sheet of the present invention has a ninth feature that it is attached to the insole of shoes or the upper surface of the insole and becomes a part of the insole.
Further, in addition to the above-mentioned first to fifth features, the skin contact sheet of the present invention has a tenth feature that it is attached to a portion of the footwear in contact with the foot and becomes a part of the footwear.
Further, in addition to the above-mentioned first to tenth features, the skin contact sheet of the present invention has an eleventh feature that the foamed elastic body is made of soft urethane foam.

According to the skin contact sheet according to claim 1, the skin contact sheet is a skin contact sheet used in contact with a part of the skin of the human body, and is breathable with open cells as main foamed bubbles. It is constructed using a certain foamed elastic body. By being composed of a foamed elastic body in which the main foamed cells are open cells, air permeability is ensured between the front surface and the back surface of the sheet.
Then, a part of the open cells is blocked in the middle of the ventilation passage from the front surface to the back surface by being pressed by the skin in contact with the skin, and becomes a vacuum suction hole for the skin in contact with the skin. It is configured.
Therefore, if the skin contact sheet is not pressed even if it is in contact with the skin, the vacuum adsorption action by the skin contact sheet does not occur, but it is in the pressed area by receiving the pressure from the skin in contact. A part of the open cells becomes a vacuum suction hole through the discharge of air from the upstream to the downstream direction of the ventilation passage and the subsequent blockage of the passage due to compression deformation, etc., and exerts a vacuum suction action to suck into the skin in contact. It will be attached. As a result, the skin and the skin contact sheet are vacuum-sucked and held in an immobilized state on the contact surfaces of both, and the occurrence of friction (rubbing) is prevented. This makes it possible to reliably prevent skin irritation and the occurrence of beans due to friction (rubbing).
Of course, in the skin contact sheet, not all open cells in the contact area are blocked by compression deformation even in the place where the skin contact sheet is in contact with the skin, and many open cells continue to have sufficient air permeability. Maintain the held state. Therefore, the moisture and hot air emitted from the skin can continue to be satisfactorily dissipated and eliminated through the skin contact sheet.

According to the skin contact sheet according to claim 2, in addition to the action and effect of the configuration according to claim 1, the open cells of the foamed elastic body used for the skin contact sheet are surface bubbles that open on the surface surface. It is composed of a cell, an internal bubble cell inside, a back surface bubble cell that opens on the back surface, and a communication hole that communicates between the cell cells.
The surface bubble cells are dispersed on the surface at a total area ratio of 30 to 70% with respect to the surface.
When the total area ratio exceeds 70%, the surface bubble cells are likely to be in a state of being largely merged between adjacent cells, and the possibility of forming a vacuum suction hole is reduced.
On the other hand, if the total area ratio is less than 30%, the number of surface bubble cells is too small, and even when open cells are formed, sufficient air permeability cannot be ensured. Moreover, when the skin contact sheet undergoes compression deformation, the probability of changing from open cells of the foamed elastic body to vacuum suction holes becomes excessive, and rather there is an adverse effect that the air permeability is greatly deteriorated.
By setting the total area ratio to 30 to 70%, the condition that the number and size of the surface bubble cells can maintain sufficient air permeability and the probability of changing from open cells to vacuum suction holes are sufficient. It is within the range that satisfies both the conditions under which the vacuum adsorption property can be exhibited.
Further, the communication holes communicating between the bubble cells are opened in the inner wall of the bubble cell at a total area ratio of 10 to 50% with respect to the inner wall of the bubble cell, at least in the vicinity of the surface surface.
By setting the total area ratio of the opening of the communication hole to the inner wall of the bubble cell to 50% or less, when the skin contact sheet is pressed on the surface surface of the cell and is in a compressed state, the surface bubble cell and the subsequent interior are compressed. The communication hole of the bubble cell is easily closed by compression, and thus the ventilation passage is closed, so that the possibility that the surface bubble cell opened on the front surface becomes a vacuum suction hole can be maintained. When the total area ratio exceeds 50%, the communication holes of the bubble cells are difficult to be closed by pressing, and the possibility of becoming a vacuum suction hole becomes too low.
On the other hand, if the total area ratio of the openings of the communication holes to the inner wall is less than 10%, the communication holes are easily blocked, the ratio of open cells becomes too small, and the air permeability of the skin contact sheet in contact with the skin becomes low. It becomes difficult to secure enough.

According to the skin contact sheet according to claim 3, in addition to the action and effect according to the configuration according to claim 2, the surface bubble cell has a cell diameter of several tens to several hundreds of microns.
Although the surface bubble cells dispersed on the surface of the foamed elastic body do not merge with each other, the cell becomes a reasonably large cell, and the total area ratio of 30 to 70% is likely to be obtained, so that sufficient air permeability is provided. It will be easier to prepare. Of course, by setting the cell diameter of the surface bubble cell to several tens to several hundreds of microns, the size of the communication hole becomes an appropriate size, and the total area ratio to the inner wall tends to be 10 to 50%, which makes skin contact. When the sheet is compressed and deformed by pressing from the skin, the ratio of changes from open cells to vacuum suction holes is an appropriate ratio without excess or deficiency. This makes it possible to provide a skin contact sheet appropriately having both breathable and vacuum adsorptive functions.
When the cell diameter of the surface bubble cell is less than several tens of microns, it is too small and the air permeability is not sufficient, and the air permeability is further deteriorated when subjected to compression deformation, which is not preferable.
On the other hand, when the cell diameter exceeds several hundred microns, the surface bubble cells are likely to be merged with each other, the opening of the communication hole tends to be too large, the ventilation passage is unlikely to be blocked, and a vacuum suction hole is formed. The ratio becomes too small.

According to the skin contact sheet according to claim 4, in addition to the action and effect of the configuration according to any one of claims 1 to 3, the surface surface of the foamed elastic body of the skin contact sheet is formed as a good slippery surface. Because I am doing
When positioning the skin and the skin contact sheet, it can be easily slid and accurately positioned at the desired position. Then, when pressure is applied from the skin in contact with the skin, the skin contact sheet is vacuum-adsorbed to the skin and held in an immobilized state. Therefore, it is possible to prevent the skin from being rubbed at the contact surface portion.

According to the skin contact sheet according to claim 5, in addition to the action and effect of the configuration of claim 4, the smooth surface of the foamed elastic body of the skin contact sheet may be surface-processed or the foamed elastic body may be surface-processed. Since it is composed by surface printing,
The foamed elastic body having open cells as the main foamed cells does not need to have a smooth smooth surface from the time of manufacture, and the manufacturing conditions of the foamed elastic body can be expanded. The foamed elastic body can be finished into a desired smooth smooth surface by surface-forming or surface-printing the surface surface of the foamed elastic body as a post-treatment.

According to the skin contact sheet according to claim 6, in addition to the action and effect according to the configuration according to any one of claims 1 to 5, the skin contact sheet is a skin pad that comes into contact with a part of the skin. Or because it becomes a part of the skin pad
At the time of use, the skin contact sheet can be accurately positioned and applied to the target skin position while sliding on the surface of the skin contact sheet. When pressure is applied between the skin and the skin contact sheet, a vacuum adsorption action is generated on the contact sheet, the skin surface and the skin contact sheet are vacuum-adsorbed, and the skin surface is kept in an immovable state. Therefore, as a skin pad or a part of the skin pad, inflammation due to friction (rubbing) can be reliably prevented.

According to the skin contact sheet according to claim 7, in addition to the action and effect of the configuration according to any one of claims 1 to 5, the skin contact sheet is attached to the inner sole of the sock and becomes a part of the sock.
When inserting the foot into the sock, the foot can slide on the surface of the skin contact sheet, which has not yet undergone the vacuum adsorption action, and can be smoothly inserted. After that, when the weight is applied and the sole presses the skin contact sheet, a vacuum adsorption action is generated on the skin contact sheet to keep the sole in an immobilized state. As a result, it is possible to provide socks that can prevent the sole of the foot from being rubbed (rubbed) and sufficiently prevent the occurrence of inflammation due to exercise and the like and the occurrence of beans and the like.
Further, the skin contact sheet according to claim 8 is arranged on the inner surface of the palm side of the glove and becomes a part of the glove, in addition to the action and effect according to the configuration according to any one of claims 1 to 5. ,
When inserting the hand into the glove, the hand can be smoothly inserted by sliding on the front surface of the skin contact sheet on which the vacuum adsorption action has not yet occurred. When pressure is applied from the palm to the front surface of the skin contact sheet after insertion, a vacuum suction action is generated on the skin contact sheet, and the palm can be vacuum sucked and immobilized. Therefore, it is possible to provide gloves that can prevent friction (rubbing) from occurring on the palm and sufficiently prevent the occurrence of inflammation and the occurrence of beans and the like.

Further, the skin contact sheet according to claim 9 is attached to the insole of shoes or the upper surface of the insole to become a part of the insole, in addition to the action and effect according to the configuration according to any one of claims 1 to 5. By
When the foot is inserted into the shoe, the skin contact sheet of the insole does not yet have a vacuum suction action, so the foot can be smoothly inserted into the shoe, while the weight of the foot is applied after the insertion. , The skin contact sheet has a vacuum suction action, and the sole of the foot can be immobilized so as to be in perfect contact with the insole. Therefore, it is possible to provide an insole that can sufficiently reduce the friction (rubbing) between the sole of the foot and the insole and sufficiently prevent the occurrence of inflammation and the occurrence of beans and the like.
Further, the skin contact sheet according to claim 10 is attached to a portion of the footwear in contact with the foot and becomes a part of the footwear, in addition to the action and effect according to the configuration according to any one of claims 1 to 5. ,
When inserting the foot into the footwear, the skin contact sheet does not yet have a vacuum suction action, so the foot can be smoothly inserted into the footwear. On the other hand, if the weight of the foot is applied after the insertion, the skin contact sheet A vacuum suction action is generated on the foot, and the part in contact with the foot can be immobilized so as to be in perfect contact with the foot. Therefore, the friction (rubbing) between the foot and the footwear can be sufficiently reduced, and the occurrence of inflammation, blister, etc. can be sufficiently prevented.

Further, in the skin contact sheet according to claim 11, in addition to the action and effect according to the constitution according to any one of claims 1 to 10, the foamed elastic body is made of soft urethane foam.
It fully demonstrates the strength and elasticity inherent in urethane as a material, has good strength and durability as a skin contact sheet, and has soft compressive deformation due to pressure from the skin in contact and its return elasticity, due to open cells. It is possible to provide a skin contact sheet having breathability and good vacuum adsorption due to a good change to some vacuum suction holes of open cells.

It is a perspective view of the skin contact sheet which concerns on embodiment of this invention. It is a figure which shows typically the state which magnified view of the skin contact sheet which concerns on embodiment of this invention. It is a figure which shows typically the structure of the foamed bubble formed on the skin contact sheet which concerns on embodiment of this invention. It is a figure which shows typically the individual structure of the foamed bubble formed on the skin contact sheet which concerns on embodiment of this invention. It is a figure explaining the feature of the skin contact sheet which concerns on embodiment of this invention, and shows the state which the skin contact sheet has not received the pressure from the skin yet. It is a figure explaining the feature of the skin contact sheet which concerns on embodiment of this invention, and shows the state which the skin contact sheet is pressed by the skin which comes into contact with each other. It is an end view in the thickness direction which shows typically the state of the air bubble in the skin contact sheet which has not been pressed by the skin yet. It is an end view in the thickness direction which shows typically the state of the air bubble in the skin contact sheet in the state of being pressed by the contacting skin.

First, with reference to FIG. 1, the configuration of the skin contact sheet 10 according to the embodiment of the present invention will be described.
The skin contact sheet 10 is made of a breathable foam elastic body 11. The foamed elastic body 11 has a predetermined thickness, has a front surface 11a and a back surface 11b, and is usually supplied as a strip-shaped long sheet or a batch sheet having a constant length and width. From this long sheet or batch sheet, a skin contact sheet 10 having a shape suitable for various uses that comes into contact with the sole, palm, or other skin parts of the human body is formed by, for example, cutting or die-cutting. .. FIG. 1 shows a skin contact sheet 10 assuming a case where the skin contact sheet 100 for the sock inner sole is attached to the inner sole of the sock and is used so as to come into contact with the sole of the foot.
The thickness of the foamed elastic body 11 of the skin contact sheet 10 is set to an appropriate thickness depending on the specific application, and is used, for example, in a thickness of about 0.5 mm to 5 mm, more generally in a thickness of 1 mm to several mm. In many cases.
There is no distinction between the front surface 11a and the back surface 11b of the foamed elastic body 11 which is the front surface and which is the back surface, but in the present invention, the surface on the side in contact with the skin is referred to as the front surface 11a. I decided to.

With reference to FIGS. 2 to 4, the foamed elastic body 11 of the skin contact sheet 10 is a foamed body in which foamed bubbles 20 are dispersed on the front surface 11a, the back surface 11b, and the inner surface 11c, and is composed of an elastic body. Has been done.
The foamed elastic body 11 can be made of a soft foamed plastic having elasticity as a material. As the soft foamed plastic, for example, a soft foamed polyurethane foam can be preferably used. Further, a soft foamed acrylic foam, a soft foamed EVA, and other resin elastomer-based or rubber-based open-cell sponges can also be adopted. However, by adjusting the compounding conditions such as the raw material ratio and the foaming agent ratio and the manufacturing conditions, a more preferable elastic state according to the application as a skin contact sheet, and a continuous change to the vacuum suction hole VSH described later are possible. It needs to be provided with bubble OC.
The foamed elastic body 11 as the skin contact sheet 10 is required to have at least breathability. This is because it has a function of dissipating moisture and sweat from the skin in contact with the skin by providing breathability.
In order to satisfy the condition of breathability, the foamed elastic body 11 has a structure in which foamed bubbles 20 (20a, 20b, 20c) are dispersed in the front surface 11a, the back surface 11b, and the inside 11c, and the foamed cells are dispersed. 20 are configured to communicate with each other through the communication holes 30 to form open cell OCs, and to have a structure having air permeability between the front surface 11a and the back surface 11b.
Of course, the foamed elastic body 11 allows the presence of some closed cells CC (see FIG. 3) that do not communicate with other cells, but by using the open cells OC as the main foamed cells 20, the contact surface with the skin. The structure is such that air permeability is ensured between the front surface 11a and the back surface 11b on the opposite side.

The foamed bubbles 20 of the foamed elastic body 11 of the skin contact sheet 10 are a front surface bubble cell 20a that opens on the front surface 11a of the foamed elastic body 11 and a back surface bubble cell 20b that opens on the back surface 11b of the foamed elastic body 11. And the internal bubble cell 20c existing in the inside 11c of the foamed elastic body 11.
Communication holes 30 are opened in the bubble cells 20a, 20b, and 20c.
The communication hole 30 communicates the adjacent bubble cells 20a, 20b, 20c and the like with each other, and the front surface bubble cell 20a, the internal bubble cell 20c, and the back surface bubble cell 20b are connected from the front surface 11a by the intervention of the communication hole 30. A large number of ventilation passages W leading to the back surface 11b are formed through the foam elastic body 11, and a large number of open cell OCs in which the front surface bubble cell 20a, the internal bubble cell 20c, and the back surface bubble cell 20b are connected are formed. ..
In the communication holes 30, one or a plurality of communication holes 30 are randomly opened in the inner walls of the individual bubble cells 20a, 20b, and 20c.
As a tendency, the larger the cell diameter of the bubble cells 20a, 20b, 20c, the larger the opening of the communication hole 30, and the larger the number of the communication holes 30 opening in the inner wall of one bubble cell 20a, 20b, 20c.
Further, the bubble cells 20a, 20b, 20c of the foamed elastic body 20 are located at the center in the thickness direction of the foamed elastic body 11 as compared with the front surface bubble cells 20a and the back surface bubble cells 20b on the front and back surfaces of the foamed elastic body 11. The cell diameter of the internal bubble cell 20c tends to increase. For example, even when the surface bubble cells 20a opening on the surface surface 11a open to the surface surface 11a independently of each other, the adjacent bubble cells 20c are largely merged with each other in the vicinity of the center of the foamed elastic body 11. Occurs.
Where such bubble cells 20a, 20b, 20c are largely merged, the air permeability is well maintained, but it is difficult to easily block the air permeability between the bubble cells 20a, 20b, 20c. Become.

With reference to FIGS. 5 to 7, in the skin contact sheet 10 made of the foamed elastic body 11 configured as described above, the skin contact sheet 10 further comes into contact with the skin of a person or the like and presses against the skin. Upon receiving the foam elastic body 11, a part of the large number of open cells OC (20a) opened to the surface surface 11a of the foamed elastic body 11 is changed to the vacuum suction hole VSH (20a), and is configured to exert an adsorption action.
FIG. 5 shows a state before the sole (skin) of a person's foot comes into contact with the foamed elastic body 11 of the skin contact sheet 10. At this stage, the foamed elastic body 11 of the skin contact sheet 10 has not been pressed yet, is in the original state, and the open cell OC occupies most of the foam, and the vacuum suction hole VSH is not generated.
On the other hand, FIG. 6 shows a state in which the sole (skin) of a person's foot is in contact with the skin contact sheet 10 and presses the skin contact sheet 10. In this state, the foamed elastic body 11 of the skin contact sheet 10 is pressed from the front surface 11a by the sole (skin) and undergoes compression deformation. Due to this compression deformation, a part of the open cell OC (surface bubble cell 20a) dispersed on the surface surface 11a is partially blocked in the middle of the ventilation passage W. In this case, by being pressed from the front surface 11a, the air in the open cell OC (front surface bubble cell 20a) is pushed downward and the ventilation passage W is closed.
Therefore, the open cell OC (front surface bubble cell 20a) in which the ventilation passage W is closed generates a negative pressure inside due to the elastic recovery action of the foamed elastic body 11, and becomes a vacuum suction hole VSH.
A large number of surface bubble cells 20a that have become vacuum suction holes VSH are dispersed, and each of the individual vacuum suction holes VSH microscopically adsorbs the sole of the foot.
By allowing a large number of fine surface bubble cells 20a to be dispersed and present on the surface surface 11a of the foamed elastic body 11, a large number of vacuum suction holes VSH are randomly generated, and evenly with respect to the contact surface portion of the sole of the foot. Disperse and adsorb. As a result, the sole of the foot can be immovably sucked and held.
Of course, by configuring a large number of surface bubble cells 20a in which the open cell OC is formed so as to remain randomly without becoming the vacuum suction hole VSH, the air permeability by the open cell OC is continuously ensured. ..

FIG. 6 is a thickness direction schematically showing a state of foamed bubbles 20 (20a, 20b, 20c) and communication holes 30 in the skin contact sheet 10 in a state where the skin contact sheet 10 is not yet pressed by the skin. It is an end view. In this state, the front surface bubble cell 20a, the internal bubble cell 20c, and the back front bubble cell 20b are communicated with each other through the communication hole 30, and almost all the ventilation passages W from the front surface 11a to the back surface 11b are the front surface bubble cell 20a. Almost all the front surface bubble cells 20a are open cell OCs together with the internal bubble cells 20c and the back surface bubble cells 20b.

FIG. 7 is an end view in the thickness direction schematically showing the state of air bubbles in the skin contact sheet 10 in a state of being pressed by the skin in contact with the skin. In this state, the ventilation passage W from the front surface bubble cell 20a to the back surface 11b via the internal bubble cell 20c and the back front bubble cell 20b is partially blocked in the middle of the passage, and a large number of open cell OCs are formed. Of the surface bubble cells 20a in the above, about half of them are randomly formed into vacuum suction holes VSH.

Of the large number of surface bubble cells 20a constituting the open cell OS, in order for some of them to change to the vacuum suction holes VSH, the size, density, and size of the communication holes 30 of the bubble cells 20a, 20b, 20c. The inventor knows that it is necessary to make the density and the like appropriate in completing the present invention.

When the individual sizes of the bubble cells 20a, 20b, and 20c become too large, the hole diameter of the communication holes 30 also increases, and the number of communication holes 30 opened in the cell cells 20a, 20b, and 20c also increases. It tends to pass.
If the bubble cells 20a, 20b, 20c are too large, the adjacent bubble cells 20a, 20b, 20c will be in close contact with each other, and the density occupied by the bubble cells 20a, 20b, 20c will also increase, so that they will easily merge with each other and become independent. It tends to be difficult to exist as a bubble cell. Of course, the communication hole 30 also becomes large, and the communication hole 30 tends to be difficult to be closed.
In this case, even if the foamed elastic body 11 is compressed and deformed by being pressed, it can hardly be expected that the existing open cell OC changes to the vacuum suction hole VSH. Therefore, even if it is compressed and deformed by being pressed by the skin, the foamed elastic body 11 hardly has a vacuum adsorption action.

On the other hand, when the individual sizes of the bubble cells 20a, 20b and 20c are too small, the bubble cells 20a, 20b and 20c are too far apart from the adjacent bubble cells 20a, 20b and 20c. Further, the densities occupied by the bubble cells 20a, 20b, and 20c are also reduced, and the total area ratio of the openings of the surface bubble cells 20a to the surface surface 11a is reduced. The diameter of the communication holes 30 opened in the bubble cells 20a, 20b, and 20c is also small and the number is small, and the total area ratio of the bubble cells 20a, 20b, and 20c to the inner wall is reduced.
Therefore, in this case, the proportion of open cells OC originally present in the foamed elastic body 11 becomes insufficient, the air permeability is lowered, and the foamed elastic body 11 is compressed and deformed by being pressed. Most of the open cell OC tends to change to the vacuum suction hole VSH, and even if adsorption is generated, sufficient air permeability cannot be ensured.

When the surface surface 11a of the foamed elastic body 11 is compressed and deformed by being pressed by the skin in contact with the foamed elastic body 11, a part of the open cell OC that opens on the surface surface 11a has an appropriate ratio, for example, the open cell OC is 30 to 70. As a condition for vacuum suction hole VSH at a rate of%,
First, the total opening area ratio of the surface bubble cell 20a that opens to the surface surface 11a with respect to the surface surface 11a needs to be in the range of 30 to 70%.
The communication hole 30 communicating between the bubble cells 20a, 20b and 20c needs to have a total area ratio of 10 to 50% with respect to the inner wall of the bubble cells 20a and 20c at least in the vicinity of the surface surface 11a.
When the total opening area ratio of the front surface bubble cell 20a exceeds 70% and the total opening area ratio of the communication hole 30 with respect to the inner walls of the bubble cells 20a and 20c in the vicinity of the front surface 11a exceeds 50%, the table is shown. The ratio of the surface bubble cell 20a remaining as the open cell OC exceeds 70%, and the ratio of the vacuum suction hole VSH is less than 30%, which makes it difficult for the vacuum suction function to be exhibited.
When the opening area ratio of the surface bubble cell 20a exceeds 70%, the surface bubble cell 20a has a large cell diameter, is close to the adjacent surface bubble cell 20a, and has a large diameter. It is in a state close to the cell 20c. When the total opening area of the communication holes 30 in the vicinity of the surface surface 11a with respect to the inner walls of the bubble cells 20a and 20c exceeds 50%, the opening area of the communication holes 30 occupying the inner wall of the bubble cells is large, and the bubble cells are compressed and deformed. Even if the communication hole 30 is received, the communication hole 30 to be opened is hardly blocked.
In the foamed elastic body 11, generally, the bubble cell in the central portion in the thickness direction (the bubble cell in the central portion in the thickness direction of the internal bubble cells 20c) tends to be the largest bubble, so that the foam elastic body 11 is in the thickness direction. In the central portion, the ventilation passage W (communication hole 30) is rarely blocked.
Therefore, in order for the surface bubble cell 20a to change from the open cell OC to the vacuum suction hole VSH, it is a condition that the ventilation passage W (communication hole 30) is closed near the surface surface 11a. For example, the presence or absence of blockage in the range of 1/3 of the thickness of the foamed elastic body 11 on the surface surface 11a side is actually important.
The vicinity of the front surface 11a is within the range of 1/3 of the thickness of the foamed elastic body 11 on the front surface 11a side. More preferably, it is within the range of 1/4 of the surface surface 11a side. From another point of view, in order for the open cell OC to become the vacuum suction hole VSH and exert a sufficient vacuum suction function, the ventilation passage W is blocked by 5 to 6 cells in the thickness direction from the surface bubble cell 20a. Since it is preferable to close the space between the cell cells 20c, the vicinity of the surface surface 11a can be said to be a range in which 5 to 6 cell cells exist from the surface surface 11a.

On the other hand, the opening area ratio of the front surface bubble cell 20a is less than 30%, and the total opening area ratio of the communication hole 30 to the inner wall of the bubble cell with respect to the bubble cells 20a and 20c in the vicinity of the surface surface 11a is less than 10%. In this case, the ratio of the surface bubble cell 20a remaining as the open cell OC is less than 30%, the ratio of the vacuum suction hole VSH exceeds 70%, and the vacuum suction function is exhibited, but the breathability function is sufficiently exhibited. become unable.
When the opening area ratio of the surface bubble cell 20a is less than 30%, the surface bubble cell 20a tends to have a small cell diameter and a distance from the adjacent surface bubble cell 20a. Further, the surface bubble cell 20a and the internal bubble cell 20c below the surface bubble cell 20a also have a small diameter and tend to be separated from each other.
When the total opening area of the communication hole 30 with respect to the inner wall of the bubble cell is less than 10%, the opening area of the communication hole 30 in the inner wall area of the bubble cells 20a and 20c becomes considerably small, and the foamed elastic body 11 undergoes compression deformation. Then, the communication hole 30 near the surface surface 11a is easily closed. Therefore, most of the surface bubble cells 20a, which were initially open cell OCs, become vacuum adsorption holes VSH, and although the vacuum adsorption property is exhibited, the air permeability is impaired.

The total opening area ratio of the surface bubble cell 20a opened to the surface surface 11a to the surface surface 11a is in the range of 30 to 70%, and the bubble cells 20a, 20c of the communication holes 30 communicating between the bubble cells 20a, 20b, 20c. By setting the total area ratio to the inner wall of the foam elastic body 11 to 10 to 50%, a part of the surface bubble cell 20a, which is a continuous cell OC, is vacuum-adsorbed when the foamed elastic body 11 is subjected to compression deformation by the skin in contact with the foam elastic body 11. The hole VSH changes to an appropriate ratio, that is, the ratio of the vacuum suction hole VSH to the open cell OC is 30 to 70%.
By changing the ratio of the vacuum suction hole VSH to the open cell OC to 30 to 70%, the vacuum suction force for the skin in contact with the skin contact sheet 10 is appropriately exhibited, and the contacting skin is adsorbed in an immovable state. Can be retained. At the same time, it is possible to ensure breathability for the skin to be contacted.
The ratio of the vacuum suction hole VSH to the open cell OC is more preferably 40 to 60%. For that purpose, the total opening area ratio of the surface bubble cell 20a opened to the surface surface 11a to the surface surface 11a is set in the range of 40 to 60%, and the bubbles in the communication holes 30 communicating between the bubble cells 20a, 20b and 20c. It is preferable to adjust the total area ratio of the cells 20a and 20c to the inner wall in the range of 20 to 40%.

It should be noted that which of the large number of surface bubble cells 20a changes from the open cell OC to the vacuum suction hole VSH is not determined in advance. Which of the surface bubble cells 20a dispersed in large numbers changes from the open cell OC to the vacuum suction hole VSH in response to the subtle change in the compression deformation of the foamed elastic body 11 due to the subtle change in the pressing force from the skin is determined. It changes each time.
Of course, even if the vacuum suction hole VSH is changed once, it returns to the original open cell OC on the way depending on the situation. The surface bubble cells 20a formed by dispersing a large number on the surface surface 11a in this way randomly change between the open cell OC and the vacuum suction hole VSH with the passage of time, and as a whole, are uniformly mutually uniform. It will exist in a dispersed manner.
Of course, the change or change between the open cell OC and the vacuum suction hole VSH is mainly due to the compression deformation of the foamed elastic body 11, but due to the state of moisture and sweat emitted from the skin, the communication hole When 30 and the like are opened or closed, the open cell OC is changed to the vacuum suction hole VSH, and vice versa, the vacuum suction hole VSH is returned to the open cell OC repeatedly.
That is, as a whole, a large number of surface bubble cells 20a change to vacuum suction holes VSH and return to the original open cell OC at random, and the moisture from the skin is removed from the skin contact sheet. It escapes to the back surface 11b side of the surface and is vacuum-adsorbed to the contacting skin surface to prevent the skin surface from rubbing.

In order for the open cell OC of the surface bubble cell 20a to change to a vacuum suction hole VSH at an appropriate ratio of 30 to 70% by pressing from the skin in contact with the open cell OC, the cell diameter of the surface bubble cell 20a must be at least several. It is preferably tens to several hundreds of microns.
By adjusting the surface bubble cell 20a to such a size, the total area ratio of the surface bubble cell 20a that actually opens to the surface surface 11a is within the range of 30 to 70%, and the surface surface 11a is overcrowded. The surface bubble cell 20a can be dispersed and opened in a state where it is neither depopulated nor depopulated. At the same time, the number of communication holes 30 that communicate with the inner wall of the surface bubble cell 20a and the internal bubble cell 20c near the surface surface 11a and the opening diameter are appropriate, and the communication holes with respect to the inner walls of the bubble cells 20a and 20c are appropriate. The total area ratio of the openings of 30 falls within the range of 10 to 50%.

In the above-described embodiment, a flexible polyurethane foam foam was actually used as the foamed elastic body 11. As a result, the strength and elasticity inherent in urethane as a material can be fully exhibited. That is, the skin contact sheet 10 has good strength and durability, has soft compressive deformation due to pressure from the skin in contact with the skin, and has return elasticity thereof, and has air permeability due to open cell OC and a vacuum of a part of open cell OC. It can be provided with good vacuum suction due to a good change to the suction hole VSH.

When the skin contact sheet 10 is attached to the skin, if it is preferable to slide the skin surface satisfactorily and move it to a target position, the surface surface of the foamed elastic body 11 should be a good slippery surface.
For example, when the skin contact sheet 10 is used in a state of being attached to the inner sole of the sock, if the front surface 11a of the foamed elastic body 11 is non-slippery, it is easy to get caught when putting the foot in the sock, and the insertion is smooth. Becomes difficult. The same is true for gloves.
As a means for making the surface surface 11a of the foamed elastic body 11 smooth, for example, there is a means for surface-processing the material surface of the foamed elastic body 11 into a smooth smooth surface having a small surface roughness. Further, the material surface of the foamed elastic body 11 may be made into a smooth smooth surface by surface printing.
Of course, in the case of the surface processing and surface printing, it is necessary not to impair the air permeability of the foamed elastic body 11.

The skin contact sheet 10 can be configured as a skin pad used by being in contact with a part of the skin or as a part of the skin pad. That is, when the skin contact sheet 10 is 100% and serves as a skin pad as it is, or when the side in contact with the skin is the skin contact sheet 10 and the side not in contact with the skin is lined with another fabric. In some cases, or when it is used only in a part of the skin pad.

The skin contact sheet 10 can be attached to the inner bottom of the sock to form a part of the sock.
Similarly, the skin contact sheet 10 can be attached to the inner surface of the palm side of the glove to form a part of the glove.
By applying the skin contact sheet 10 to the inner bottom of the sock, when a pressing force is applied to the skin contact sheet 10 from the sole of the foot with the foot in the sock, a large number of openings are made on the front surface 11a of the skin contact sheet 10. The surface bubble cell 20a of No. 1 is changed from the open cell OC to the vacuum suction hole VSH, and the open cell OC and the vacuum suction hole VSH are in a mixed state. As a result, the skin contact sheet 10 becomes a sheet having both a ventilation function and a vacuum suction function, and keeps the back surface of the foot in an immobilized state to prevent its friction (rubbing) and removes moisture from the back surface of the foot. It is discharged to the back surface 11b side of the contact sheet 10 to prevent moisture from accumulating on the sole of the foot. Therefore, friction (rubbing) on the sole of the foot can be eliminated, and frictional heat generation, inflammation generation, beans and blisters can be eliminated.
The case of gloves is the same as that of the above socks.

The skin contact sheet 10 can be attached to the upper surface of the insole of a shoe or the insole to form a part of the insole.
That is, when the skin contact sheet 10 is 100% and the insole is used as it is, or when the side in contact with the skin is the skin contact sheet 10 and the side not in contact with the skin is the insole lined with another material. It corresponds to the case where the insole is limited to only a part of the insole and the skin contact sheet 10 is used so as to contact only a part of the sole of the foot. When shoes are worn with bare feet, the soles of the feet are held immobilized on the front surface of the insole, and breathability is also maintained. In this case as well, friction (rubbing) on the sole of the foot is eliminated, and the occurrence of inflammation, beans and blisters can be prevented.

The skin contact sheet 10 can be attached to a portion of the footwear in contact with the foot to form a part of the footwear.
When the skin contact sheet 10 is attached to a part of footwear such as shoes, sandals, sandals, slippers, etc. and comes into contact with the foot, and the attached decontact sheet 10 is pressed by the skin, the skin is pressed. It can be held in an immovable state by vacuum suction and can also maintain air permeability. Therefore, it is possible to provide footwear that can prevent inflammation, beans and blisters due to friction (rubbing) from the portion where the foot comes into contact with the foot.

The skin contact sheet 10 does not necessarily have to be a flat sheet, including the skin contact sheet 100 for the inner sole of socks and the palm-shaped contact sheet.
The three-dimensionally curved skin contact sheet 10 needs to exert its function as, for example, a skin contact sheet extending from the sole (palm) to the side surface of the foot (side surface of the hand) and, in some cases, the instep (back of the hand). It becomes possible to correspond to the sex.

10 Skin contact sheet 11 Foam elastic body 11a Front surface 11b Back surface 11c Inside 20 Foam bubbles 20a Front surface bubble cell 20b Back surface bubble cell 20c Internal bubble cell 30 Communication hole 100 Skin contact sheet for sock inner sole OC Continuous bubble CC Closed cell VSH vacuum suction hole W ventilation passage

Claims (11)

1. A skin contact sheet that is used by contacting a part of the human skin such as the sole of the foot or palm.
   The skin contact sheet is constructed by using a breathable foamed elastic body in which open cells are mainly foamed bubbles.
   Moreover, the open cells of the foamed elastic body are the above-mentioned by receiving the pressure from the skin in contact with some of the open cells among the many open cells that open to the front surface on the side that receives the pressure from the skin. A skin contact sheet characterized in that it is blocked in the middle of a ventilation passage from the front surface to the back surface and is configured to be a vacuum suction hole for the skin in contact with the skin.
2. The large number of open cells that make up the ventilation passage from the front surface to the back surface of the foamed elastic body are the front surface bubble cell that opens on the front surface, the internal bubble cell inside, and the back surface bubble cell on the back surface. The communication holes are composed of communication holes communicating between the bubble cells, the surface bubble cells are dispersed on the surface surface at a total area ratio of 30 to 70% with respect to the surface surface, and the communication holes communicating between the bubble cells are formed. The skin contact sheet according to claim 1, wherein at least in the vicinity of the front surface, the skin contact sheet is configured to open to the inner wall of the bubble cell at a total area ratio of 10 to 50% with respect to the inner wall of the bubble cell. ..
3. The skin contact sheet according to claim 2, wherein the surface bubble cell has a cell diameter of several tens to several hundreds of microns.
4. The skin contact sheet according to any one of claims 1 to 3, wherein the surface surface of the foamed elastic body of the skin contact sheet is formed as a smooth smooth surface.
5. The skin contact sheet according to claim 4, wherein the smooth smooth surface of the front surface of the foamed elastic body of the skin contact sheet is formed by surface processing or surface printing of the foamed elastic body.
6. The skin contact sheet according to any one of claims 1 to 5, wherein the skin pad is in contact with a part of the skin, or is a part of the skin pad.
7. The skin contact sheet according to any one of claims 1 to 5, which is attached to the inner bottom of the sock and becomes a part of the sock.
8. The skin contact sheet according to any one of claims 1 to 5, which is attached to the inner surface of the palm side of the glove and becomes a part of the glove.
9. The skin contact sheet according to any one of claims 1 to 5, which is attached to the insole of shoes or the upper surface of the insole and becomes a part of the insole.
10. The skin contact sheet according to any one of claims 1 to 5, which is attached to a portion of the footwear in contact with the foot and becomes a part of the footwear.
11. The skin contact sheet according to any one of claims 1 to 10, wherein the foamed elastic body is made of soft urethane foam.

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