JP2001104103A - Sheet-like pressure relieving material and bedsore preventing mat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a sheet-like pressure relieving material relieving pressure flexibly without giving a realization of the contact with clumpy matters even when the pressure is applied by the contact with a human body and the like while maintaining high gas permeability and a bedsore preventing mat using the material. SOLUTION: A sheet-like pressure relieving material 1 is provided with a flexible sheet 3 having gas permeability and clumpy matters 2 having elasticity and directionality of tilt at the time when pressure is applied, and these clumpy matters 2 are fixed to the flexible sheet 3 while maintaining gas permeability in such arrangement pattern that the adjacent clumpy matters have different tilting directions from each other and contact with each other at the time when they tilt. Moreover, a bedsore preventing mat is constituted by covering the sheet-like pressure relieving material 1 with a bag 4 and the like.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-pressure sheet-like material for relieving pressure and a mat for preventing bedsore using the same.

[0002]

2. Description of the Related Art Conventionally, for example, for elderly and sick persons who have been forced to stay bedridden on a bed for a long time, bed sores (pressure sores) caused by pressure, friction or moisture on the skin or subcutaneous tissue are large. It is a problem. As a countermeasure against bedsores, a so-called air mat which is installed on a bed and used is known. However, it has been found that the air mat does not have air permeability and thus has a problem such as rash due to moisture or the like.

Accordingly, the present inventor has disclosed in Japanese Patent Application No. 11-1417.
No. 96 proposed a sheet-like flexible material that can be used as a material such as a bedsore prevention mat. As shown in FIG. 15, this is a flexible sheet 9 having transparent eyes 90 penetrating on the front and back.
1 and a mass 92 having elasticity.
Are entangled and fixed to the flexible sheet 91 while maintaining the air permeability through the transparent eyes 90 in a desired pattern. The sheet-like flexible material can relieve pressure by the elastic deformation of the lump 92, and has air permeability.

[0004] Clinical trials were repeated to use the sheet-like flexible material as a bedsore prevention mat. The exam is
A sheet-like flexible material of the same size was laid on a hospital bed, and sheets were further laid on the upper surface thereof so that the subject was laid down. The same operation was performed when the sheet-like flexible material was inserted into a bag-like sheet and laid on a bed. As a result, about 70% in 3 weeks
It was found that bedsore improved with the improvement rate of. The reason is that compression on the skin and subcutaneous tissue is locally applied only to a part through the mass, there is no compression on other body parts, and pressure is dispersed because the mass deforms elastically It is presumed that there is. It is presumed that the friction is also reduced because the pressure is dispersed. Further, regarding moisture, it is presumed that high air permeability is maintained between the lump and the transparent portion of the flexible sheet, and so-called sweat pool is eliminated.

[0005]

The above-mentioned sheet-like flexible material is an excellent material which can relieve pressure while maintaining high air permeability. However, when the sheet-like flexible material is used for a bedsore prevention mat or the like and is brought into contact with a human body, it loses weight. When a pressure is applied, for example, by placing a piece on the surface, the agglomeration of the individual lumps can be felt, so that there is room for improvement.

Accordingly, the present invention has been made based on the above clinical test,
Uses a new sheet-type loosely-pressed material that maintains a high air permeability and even when pressure is applied by contacting the human body, etc., so that the pressure is softly relaxed and the mass does not come into contact with the material. It is intended to provide a mat for preventing bedsores.

[0007]

In order to solve the above-mentioned problems, a sheet-shaped loose-pressing material according to the present invention comprises a flexible sheet having air permeability, and a sheet which is inclined when subjected to elastic pressure. With a lump having directionality, the lump is arranged in such a manner that adjacent lumps have different inclination directions and come into contact with each other when the lump is inclined, while maintaining air permeability to the flexible sheet. It is stuck.

[0008] By the above means, the mass abuts from different plane directions in a state of air permeability, and when pressure is applied to the sheet-like low-pressure material, the mass is tilted. Further, when the mass is tilted to a certain extent, the mass comes into contact with an adjacent mass and further tilting is suppressed.

According to a second aspect of the present invention, as a preferred form of the arrangement pattern, the masses are arranged so that the directions of inclination are orthogonal to each other.
By the above-mentioned means, the adjacent mass acts as a tilt stopper from the orthogonal direction.

According to a third aspect of the present invention, as another preferred form of the arrangement pattern, the masses are arranged such that the inclination directions of adjacent masses form a polygon. By the above means, the tilting direction of the adjacent mass is set.

According to a fourth aspect of the present invention, the mass is narrowed in a tilting direction. This makes it easier for the lump to tilt in the direction in which the lump is formed narrow.

According to a fifth aspect of the present invention, the mass is a columnar body having a horizontal upper end surface having a substantially oval shape narrowing in a tilting direction.

According to a sixth aspect of the present invention, the flexible sheet has a transparent eye penetrating from front to back. By the above-described means, high air permeability is ensured through the transparent mesh.

According to a seventh aspect of the present invention, the flexible sheet comprises:
It is a three-dimensional knitted fabric in which the first and second fabrics of mesh knitting are bridged by elastic jumping yarns. By the above means, when the mass is tilted by the pressure, the jumping yarn of the three-dimensional knitted fabric is bent, so that the mass is more easily tilted. Moreover, since the lump is tilted while sinking due to the warp yarn being bent, an excessive pulling force is not generated at the portion where the lump is fixed to the flexible sheet.

Further, a woven fabric or a non-woven fabric having a permeability is formed by processing the above-mentioned sheet-shaped low-pressure material into a desired shape.
Alternatively, it is a bedsore prevention mat formed by combining knitted fabrics as necessary. Specifically, the above combination is realized by covering the sheet-like low-pressure material with a bag made of the woven cloth or the like, or by laminating the material with the woven cloth or the like.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment (1) of the present invention will be described below.
Will be described in detail with reference to FIGS. As shown in FIG. 1, the sheet-shaped mildly-pressed material 1 of the present invention is schematically configured such that a lump 2 is fixed to a flexible sheet 3.

The lump 2 has a tilting direction when pressure is applied. Here, "having a tilting direction" means
When pressure is applied to the sheet-like low-pressure material 1 in which the mass 2 is fixed to the flexible sheet 3, the mass 2 is elastically deformed and the mass 2 itself tilts down (tilts). This means that there is a direction in which tilting occurs and a direction in which tilting is difficult.

As shown in FIG. 2, the lump 2 is formed in a columnar shape having a substantially oval upper end surface 20, and the upper end surface 20 is formed narrower along the tilting direction. That is, assuming that the direction formed narrow is the short axis b and the direction perpendicular thereto is the long axis a, the direction in which the lump 2 is most likely to tilt is
The direction in which the width is narrow, that is, the direction along the short axis b, and the direction in which it is difficult to incline, on the other hand, are the directions along the long axis a. Here, if the ratio between the major axis a and the minor axis b is too small, the direction of the inclination of the lump 2 is lost, which is not preferable. In consideration of these, it is preferable that the major axis a: the minor axis b = about 3: 1 to 7: 1.

Further, as shown in FIG. 2, it is preferable that the upper end surface 20 of the lump 2 is substantially a horizontal plane. In the case of a horizontal surface, for example, when the contact is made with a human body, the pressure per contact area is reduced, and it is possible to suppress a feeling of contact of the massive object 2. Further, the upper end surface 20 can be slightly formed with chamfers 23 at both ends in the direction of the short axis b so that the clumps 2 do not become corners when tilted.

The size of the upper end surface 20 of the lump 2 is appropriately determined in consideration of the elastic modulus and the shape of the lump 2 or a desired gentle pressure. In general, when the size of the upper end face 20 is small, the lump 2 is easily deformed more than necessary due to pressure, so that the pressure-releasing property is reduced, and the area in contact with the human body or the like is reduced, resulting in a so-called point contact state. The agglomeration of the lump 2 is undesirably felt. Conversely, if the size of the upper end surface 20 is large, the lump 2 is less likely to tilt, impairing the air permeability of the flexible sheet 3 and increasing the total weight, which is not preferable. As a specific numerical value, the area of the upper end face 20 is 50
A dimension that is about 350 mm ² is preferable.

Various materials having elasticity are used as the material of the lump 2. Specifically, urethane resin,
Examples include various elastomer resins such as butadiene rubber, styrene-butadiene rubber, chloroprene rubber, natural rubber, silicone gel, silicone rubber, acrylic rubber, and styrene rubber. Among them, particularly, a urethane resin which is advantageous in terms of cost is preferably used.

In fixing the lump 2 to the flexible sheet 3, the lump is fixed in an arrangement pattern such that adjacent lumps have different inclination directions. Referring to FIG.
The tilting direction (arrow direction) of the lump 2A and the tilting direction (arrow direction) of the lump 2B adjacent to the lump 2A are orthogonal to each other, and the direction in which the lump 2A tends to tilt. Corresponds to the direction in which the lump 2B is most difficult to tilt.

The distance d1 between the lump 2A and another lump 2B close to the lump 2A is such that the lump 2A and the lump 2B are separated without contact with each other when the lump 2A is not tilted. Sometimes the intervals are such that they come into contact with each other. Specifically, it is appropriately determined in consideration of the degree of ease of tilt determined by the elastic modulus, shape, and the like of the lump 2A, the height h of the lump 2A protruding from the flexible sheet 3, and the like. In general, it is preferable to set the distance d1 such that the one lump 2A comes into contact with the other lump 2B when tilted by 5 to 35 °. Further, the distances d2 to d4 are usually the distances d.
It is set equal to 1, but can be set differently. For example, by increasing the distances d2 and d4 from the distances d1 and d3, it is possible to give directionality to the gentle pressure property of the sheet-like gentle pressure material.

The height h of the lump 2A protruding from the surface of the flexible sheet 3 varies depending on the elastic modulus and dimensions of the lump 2A. In general, when the lump is low, the lump 2A hardly tilts. However, it is not preferable because the gentle pressure is reduced. Conversely, even if it protrudes too much, the lump 2A may be damaged due to repeated tilting, which is not preferable. Therefore, it is appropriately set in consideration of these. Specifically, it is preferable to protrude about 5 to 20 mm.

FIG. 3 is a top view of the arrangement pattern of the lump 2 in the sheet-like low-pressure material 1 of FIG. In this way, by making the arrangement pattern in which the tilting directions of the block 2A and the block 2B are orthogonal to each other, when the block 2A and the block 2B are brought into contact with a human body or the like, the block 2A, the block 2B, and the wide space including the gap therebetween are included. Region ((d4 + a + d2 + b) in FIG. 3)
The region S) represented by the area of × (d2 + a + d1 + b) is felt as if in contact, and it is possible to suppress the actual feeling of contact between the individual lump. In addition, while making the user feel a contact in a wide area, the gap between the aggregates (for example, the gap M)
Therefore, high air permeability can be ensured.

The ratio of the lump 2 to the surface of the flexible sheet 3, that is, the occupancy is not particularly limited. 2 is not preferable because it is felt, and conversely, if it is large, the air permeability of the flexible sheet 3 is hindered, and the overall weight increases, making it difficult to handle. Is appropriately determined in consideration of the relationship with the dimensions. Specifically, the occupation ratio of the lump 2 to the flexible sheet 3 is preferably in the range of 20 to 70%.

Next, the flexible sheet 3 to which the lump 2 is fixed will be described. As shown in FIG. 1, the flexible sheet 3 has transparent eyes 30 penetrating from front to back. Here, the transparent eyes 30 mean an infinite number of holes that penetrate through the front and back of the flexible sheet 3 so as to be visible. Therefore, for example, this is a concept that is distinguished from fine gaps that exist in the weave of a woven fabric in which yarns are combined vertically and horizontally. Through the see-through line 30, high air permeability of the flexible sheet 3 and thus of the sheet-like low-pressure material 1 is ensured. When the ratio of the transparent stitch 30 to the surface of the flexible sheet 3 is small, the air permeability is reduced and it is unsuitable. Therefore, it is appropriately determined in consideration of these. Specifically, an area ratio of 15
It is preferred that the pores be opened to ~ 85%, preferably 30-70%.

As the flexible sheet 3, as shown in FIG. 4, a three-dimensional knitted fabric 31 is formed by bridging a first knitted fabric 31a and a second knitted fabric 31b with an elastic jumping yarn 31c. Adopted. The three-dimensional knitted fabric 31 is also referred to as a so-called “Russell knit”, and includes a jumping yarn 31c.
Are made of synthetic resin filaments or an aggregate thereof, and have sufficient self-supporting strength to maintain an interval between the first fabric 31a and the second fabric 31b. Also, the first
The mesh knitting forming the cloth 31a and the second cloth 31b refers to a knitted cloth having a relatively large stitch, and the first knitted cloth 31a and the second cloth 3 are formed through the stitch.
A transparent line penetrating to 1b is formed. The transparent mesh ratio in the three-dimensional knitted fabric 31 refers to the ratio when viewed through the first fabric 31a and the second fabric 31b. Therefore, the ratio of the transparent mesh of the three-dimensional knitted fabric 31 is the first fabric 31a.
Is usually smaller than the ratio of the transparency of each of the individual fabrics due to the displacement between the second fabric 31b and the second fabric 31b, but such a case is also included in the above numerical range.

As a method of fixing the lump 2 to the flexible sheet 3, for example, a resin material is filled into an intaglio or stencil having recesses or holes formed in the arrangement pattern of the lump 2 and then squeegeeed. A method of mounting the flexible sheet 3 and performing heat press with a relatively weak pressure to fix the lump 2 and the flexible sheet 3 can be adopted. In addition, a method of adhering the lump 2 to the flexible sheet 3 with an adhesive is appropriately selected.

It is particularly preferable that the lump 2 is entangled with the flexible sheet 3 and fixed. Here, “entangled and fixed” means that the flexible sheet 3 is integrated into the lump 2 from the end face or the peripheral surface of the lump 2 toward the inside. This is different from the case where the conductive sheet 3 is in surface contact with and adheres to the surface. Therefore, a situation in which the block 2 shifts or falls off on the flexible sheet 3 does not occur.

The degree of entanglement when entangled and fixed is determined according to the method of fixing by heat press.
It can be controlled by adjusting the temperature, the heating time, or the pressure. When the degree of entanglement is small, that is, when the lump of the lump 2 into the flexible sheet 3 is small, the overall flexibility of the sheet-like low-pressure material 1 is excellent. Further, when the degree of entanglement is increased, that is, when the lump 2 is deeply penetrated into the flexible sheet 3, the flexibility of the sheet-like low-pressure material 1 is slightly reduced, but the lump 2 becomes flexible. It is excellently durable because it is firmly fixed to the conductive sheet 3. Therefore, conditions for fixing are appropriately determined in consideration of these balances.

The sheet-like low-pressure material 1 configured as described above
The operation when pressure is applied will be described with reference to FIG. As shown in FIG. 5, when a pressure F is applied to the sheet-like low-pressure material 1 in the direction of the arrow in FIG.
A is tilted as a whole, sometimes with its own elastic deformation. Thereby, the pressure F can be softly reduced not only by elastic deformation of the lump 2A itself but also by tilting. Particularly, since the lump 2 </ b> A is more likely to be tilted due to the warp of the jumping yarn 31 c, the pressure is more easily alleviated. As a result, it is possible to suppress a feeling of contact of the lump 2A when the lump 2A is brought into contact with a human body for preventing bedsore.

When the mass 2A is tilted to a certain extent, the mass 2B comes into contact with the adjacent mass 2B. At this time, the inclination direction of the mass 2B is different from that of the mass 2A. It does not incline in the same direction as 2A, and acts to prevent the mass 2A from further inclining. As a result, the inclined mass 2A does not block the air permeability by covering the surface of the three-dimensional knitted fabric 31 which is a flexible sheet, and high air permeability can be maintained. In addition, similarly, the pressure F
Elastically deforms itself, furthermore, the direction of the pressure F, the direction of the force received by the contact of the mass 2A, and the mass 2
B tilts in a direction determined by the tilting direction of B itself. Therefore, the pressure such as the body weight can be flexibly alleviated in the entire lump including the lump 2A and the lump 2B, and the actual contact of the lump can be suppressed. In addition, the contact surface of the sheet-shaped mildly-pressurized material can be kept entirely smooth by suppressing the inclination of the mass to a certain degree or more. Therefore, it is preferable from the viewpoint of preventing bedsore without concentration of pressure.

Further, since the tilting of the lump 2A is suppressed to some extent, no excessive pulling force is applied to the fixing portion N between the lump 2A and the flexible sheet 3. In particular, since the jumping yarn 31c bends and sinks in the direction in which the lump 2A tilts, the pulling force applied to the fixed portion N is further reduced. As a result, the mass 2A does not fall off from the three-dimensional knitted fabric 31 which is a flexible sheet, or the mass 2A itself is not damaged, and the durability of the sheet-shaped loosely-pressed material 1 is improved. Can be.

In the above-mentioned embodiment (1), the case where the three-dimensional knitted fabric 31 is used as the flexible sheet 3 has been described. , A coarse woven fabric such as Sina Micros, cotton core, polar, georgette, a regular non-woven fabric with a number of transparent holes formed by holes, or a mesh knitted fabric it can. In addition, synthetic resin sheets and films having a large number of transparent openings may be used as long as they have flexibility.

In addition, various materials can be used for the flexible sheet 3 provided that it has air permeability. Specifically, those using animal or vegetable natural fibers, and synthetic fibers (for example, acetate,
Nylon, polyester, acrylic, vinyl chloride, polyurethane, polyvinylidene chloride, etc.), or a woven fabric, nonwoven fabric, or knitted fabric composed of only the above synthetic fibers.

In addition, a hollow filler can be added to and dispersed in the mass 2 for the purpose of reducing the weight and adjusting the elastic modulus. Specific examples of the hollow filler include Philite (registered trademark, manufactured by Nippon Philite Co., Ltd.) and Expancel (registered trademark, manufactured by Nippon Philite Co., Ltd.). Further, a foam filler or foam beads can be added and dispersed. Specific examples include foamable resins such as polystyrene and polyvinylidene chloride. Note that any one of the fillers may be selected and used, or a plurality of types may be used in combination.

Further, various functional materials can be added to the lump 2 in the form of granules or powder. For example, various ceramic materials exhibiting a far-infrared radiation effect, photocatalytic materials such as TiO ₂ and SiO ₂ exhibiting a deodorizing and antibacterial effect, deodorizing materials such as TZ / SZ, antibacterial agents of natural origin such as hinokitiol, stimuli instead of acupressure. Effective magnetic powder,
Materials such as chitin and chitosan or silver powder or copper powder having a bactericidal effect, hollow materials such as silicon boride ceramics having a lightening or buffering effect, fine phosphor powder having a luminous effect,
Examples thereof include a photochromic material that emits and changes color by light, and shell powder such as scallop powder that acts as an anti-slip material. One or more of these functional materials can be added.

FIG. 6 shows an embodiment (2) of the present invention. In this case, the aggregates 2 are arranged such that the inclination directions of adjacent aggregates form a polygon. For example, looking at six adjacent massive objects 2 centered on the region C, their tilting directions (arrows in the figure) form a hexagon. With such an arrangement pattern, in any direction in the surface of the sheet-shaped lightly-pressurized material, there is a lump that easily tilts in that direction, so that the pressure can be appropriately reduced.

The present invention is not limited to the example of the arrangement patterns shown in the above embodiments (1) and (2), and (i) the inclination directions of the adjacent blocks are different from each other;
i) arranging them so that they contact each other when tilting;
If the above condition is satisfied, various arrangement patterns can be adopted.

FIGS. 7 to 13 show embodiments (3) to (9) of the present invention. In the embodiment (3) of FIG. 7, the lump 2 </ b> A is formed in the shape of a quadrangular prism, and its tilting direction is the direction of the arrow in the figure along the direction of the narrow short axis b. . The upper end face 20 is formed horizontally, which is the same for the following embodiments (4) to (7). The lump directions of the lump 2A and the lump 2B are arranged to be orthogonal to each other.

In the embodiment (4) shown in FIG. 8, the lump 2A is formed in the shape of a hexagonal prism. Again,
The tilt direction is the direction of the arrow in the figure along the direction of the short axis b formed to be narrow, and the lump directions of the lump 2A and lump 2B are arranged so as to be orthogonal.

In the embodiment (5) of FIG. 9, the lump 2A is formed in a triangular prism shape. The tilting direction is a direction along the short axis b formed to be narrow. However, as shown by the arrow in the figure, the one closer to the vertex of the upper end face 20 is narrower, so that it is particularly easy to tilt. In FIG. 9, the lump 2A and the lump 2B are arranged so that the directions of the long axes a are orthogonal to each other, and the inclining directions are different from each other.

Further, the lump 2A in the embodiment (6) in FIG. 10 is formed in a columnar body having a trapezoidal upper end surface 20 in shape. In this case, it is easy to tilt in the directions of arrows A and B in the figure along the short axis b formed to be narrow, but it is particularly easy to tilt in the direction of arrow A. In addition, lump 2A
And the block 2B are arranged such that the tilting directions are orthogonal to each other.

In the embodiment (7) shown in FIG. 11, the lump 2A is formed as a column having a semi-elliptical upper end surface 20. In this case, it is easy to tilt in the directions of arrows A and B along the short axis b, but it is particularly easy to tilt in the direction of arrow A.
As in the examples of FIGS. 10 and 11, the shape of the lump can be formed such that the direction in which the lump is easily inclined is asymmetric. The lump 2A and the lump 2B are arranged so that the tilting directions are orthogonal to each other.

Further, in the embodiment (8) of FIG.
A hollow portion 21 penetrating the upper and lower surfaces is formed in the lump 2A. In this case, since the hollow portion 21 has air permeability, the mass 2A can improve the overall air permeability without inhibiting the air permeability of the flexible sheet 3. Further, when the hollow portion 21 is formed, when the pressure is applied, the lump 2A is flexible, so that the lump 2A is easily inclined and the pressure can be appropriately reduced. It also contributes to the overall weight reduction. In addition, in FIG. 12, lump 2A,
Inclination direction with the adjacent mass 2B (direction along the short axis b)
Are arranged to be orthogonal.

Further, in the embodiment (9) of FIG. 13, a hollow portion 22 which does not penetrate the upper and lower surfaces is formed in the lump 2A. This structure reduces the weight as a whole as in the example of FIG. 12, makes the lump 2A more flexible, and improves the adhesion to the flexible sheet 3 as compared with the example of FIG. . Note that the lump direction (the direction along the short axis b) of the lump 2A and lump 2B is arranged to be orthogonal.

As the above-mentioned lump of various shapes, any lump can be used, or a plurality of lump can be used in combination.

Next, the bedsore prevention mat can be obtained by processing the above-mentioned sheet-like low-pressure material into a desired shape and combining it with a woven, nonwoven or knitted fabric having air permeability. As a method of processing into a desired shape, for example,
According to the size of the bed, there is a method of appropriately cutting the sheet-shaped low-pressure material. As a combination method, for example, as shown in FIG.
Is covered with a bag 4 made of a woven, non-woven, or knitted fabric having air permeability, or a woven, non-woven, or knitted fabric having air permeability is adhered to a sheet-like low-pressure material,
A method of laminating by sewing or the like is appropriately used.

FIG. 14 shows an example of using the bedsore prevention mat. FIG. 14 shows a state in which a bedsore prevention mat 50, which is formed by covering the sheet-like loose-pressure material 1 with a bag 4 having air permeability, is attached so as to cover the entire surface of the bed 51, or is simply placed. Actually, since the upper surface of the sheet-shaped loosely-pressed material 1 is covered by the bag 4, the sheet-like loosely-pressed material 1 cannot be seen. In addition, the bedsore prevention mat 50 may be used on a part of the upper surface of the bed so as to hit a part of the human body where a bedsore is particularly likely to occur.

Since the bedsore prevention mat 50 has high air permeability, it does not get stuffy due to perspiration or the like, and can keep its surface clean even after long-term use. In addition, it feels cool because it is easy to dissipate heat and is very comfortable.
Furthermore, since the lump inclines with respect to the pressure such as the weight, the pressure can be more flexibly relieved, and the user does not feel the abutment of the lump. Further, when the mass is tilted to some extent, further tilting is suppressed, so that the air permeability is not hindered, and no excessive force is applied to the mass, so that the durability of the mat for preventing bedsores is improved.

As described above, the sheet-shaped loose-press material of the present invention is suitably used as a bedsore prevention mat. In addition, for example, the lining of sports clothes and work safety clothes, and the underlay of the floor Seats for automobiles, bicycles, etc., seats for wheelchairs, belts for treating back pain, hats, headbands, headgear, supporters, goggle bands, pillow covers, headrests, insoles, shoe sole cushioning materials, helmet cushioning materials, etc. It is an excellent material that works effectively for many applications.

[0053]

Next, the present invention will be described in more detail with reference to examples. (Example 1) As a flexible sheet, Fusion I AKE64010 (4 mm) which is a three-dimensional knitted fabric manufactured by Asahi Kasei Corporation
Spacing Russell knitting) was used. Further, as a material constituting the lump, Hyprene P302 manufactured by Mitsui Chemicals, Inc. is used.
(Isocyanate) and Hyprene D45B (polyol) were used. These form a urethane resin by polymerizing.

Next, an intaglio having concave portions formed in a desired arrangement pattern is filled with a mixture obtained by mixing the above isocyanate and polyol with the same weight (1: 1), squeegeeed, and the above three-dimensional knitted fabric is placed thereon. 0.8 kgf / cm ² force, about 60
A heat press at about 40 ° C. for about 40 minutes was performed to fix the lump and the flexible sheet, thereby obtaining a sheet-like low-pressure material of the present invention. The arrangement pattern of the lump in the prepared sheet-like low-pressure material is as shown in FIG. 1, the length of the long axis of the lump is 20 mm, the length of the short axis is 5 mm, and the distance to the adjacent lump is It was set to 3 mm. The height of the lump protruding from the three-dimensional knitted fabric was 8 mm. In addition, the hardness of the lump in the obtained sheet-like low-pressure material is JIS K6301.
(Vulcanized rubber physical test method A type test) had a hardness of 45.

(Example 2) On the side of the sheet-like low-pressure material obtained in Example 1 to which a lump was fixed, a three-dimensional knitted fabric made by Asahi Kasei Corporation, Fusion I AKE64670 (8 mm) was used.
(Russell stitch at intervals), and the periphery was sewn with a bag to obtain a bedsore prevention mat. Subsequently, a clinical test was performed on the obtained bedsore prevention mat. The test was conducted by placing a bedsore prevention mat of the same size on a hospital bed, and laying sheets on the upper surface of the mat so that the subject could lie down. As a result, it was found that bedsore improved with an improvement rate of about 78% in three weeks. This result exceeds the performance of the conventional bedsore prevention mat. In addition, the same test was performed on a subject without bedsores. As a result, no bedsores occurred and the effect of preventing bedsores was excellent. In addition, most subjects did not feel the abutment of the lump, and obtained a questionnaire result that it was comfortable to use.

[0056]

As described above, the sheet-shaped loose-pressed material of the present invention is capable of flexibly relieving the pressure since the lump tilts when the pressure is applied by contact with the human body or the like. The feeling of contact can be suppressed. In addition, since the arrangement pattern of the aggregates is configured such that adjacent aggregates have different tilting directions and are in contact with each other when inclined,
Tilt of the masses beyond a certain level is suppressed, and high air permeability between the masses is maintained. Further, since the tilting is suppressed, a load is not applied to the fixed portion between the lump and the flexible sheet, so that the durability is excellent.

In particular, when a three-dimensional knitted fabric is used as the flexible sheet, since the jumping yarn bends, the lump is more likely to incline, and the pressure is softened more flexibly. Is further suppressed. Further, since the lump is inclined while sinking into the three-dimensional knitted fabric, no load is applied to the fixed portion between the lump and the flexible sheet, and the durability is further improved.

Further, the bedsore prevention mat using the above-mentioned sheet-shaped loosely-pressed material can flexibly relieve the pressure due to the weight and does not actually feel the contact of the lump, so that a comfortable use feeling can be obtained. Can be In addition, since high air permeability is maintained, bedsores can be suitably prevented without rash or the like.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a sheet-like low-pressure material according to a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of a sheet-shaped low-pressure material according to the embodiment (1) of the present invention.

FIG. 3 is a plan view of a sheet-shaped mildly-pressed material according to Embodiment (1) of the present invention.

FIG. 4 is an enlarged view of a XX section of FIG. 1;

FIG. 5 is a diagram when a pressure is applied to a sheet-like low-pressure material according to the embodiment (1) of the present invention.

FIG. 6 is a plan view of a sheet-shaped mildly-pressed material according to Embodiment (2) of the present invention.

FIG. 7 is a perspective view showing a sheet-like low-pressure material according to the third embodiment of the present invention.

FIG. 8 is a perspective view showing a sheet-like low-pressure material according to Embodiment (4) of the present invention.

FIG. 9 is a perspective view showing a sheet-like low-pressure material according to the embodiment (5) of the present invention.

FIG. 10 is a perspective view showing a sheet-like low-pressure material according to Embodiment (6) of the present invention.

FIG. 11 is a perspective view showing a sheet-like low-pressure material according to the embodiment (7) of the present invention.

FIG. 12 is a perspective view showing a sheet-like low-pressure material according to the embodiment (8) of the present invention.

FIG. 13 is a perspective view showing a sheet-like low-pressure material according to the embodiment (9) of the present invention.

FIG. 14 is a diagram showing a usage example of the bedsore prevention mat of the present invention.

FIG. 15 is a diagram showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Sheet-like loose-press material 2, 2A, 2B Lump 20 Upper end surface 21, 22 Hollow part 23 Chamfer 3 Flexible sheet 30 Transparent 31 Three-dimensional knitted fabric 31a First fabric 31b Second fabric 31c Transition yarn 4 Bag 50 Bed slip Prevention mat 51 Bed 90 Transparent 91 Flexible sheet 92 Lump a Long axis b Short axis d1, d2, d3, d4 Distance h Height S area M Void C area F Pressure N Fixed part

Claims (8)

[Claims] 1. An air-permeable flexible sheet, and a lump having resiliency and having a direction of inclination when pressure is applied, and the lump is formed by adjoining lump A sheet-like low-pressure material that is fixed to a flexible sheet while maintaining air permeability in a disposition pattern in which the directions of inclination are different and come into contact with each other when inclined. 2. The sheet-shaped mildly-pressed material according to claim 1, wherein the masses are arranged such that the inclination directions of the masses adjacent to each other are orthogonal to each other. 3. The sheet-shaped loosely-pressed material according to claim 1, wherein the masses are arranged such that the inclination directions of adjacent masses form a polygon. 4. The sheet-shaped mildly-pressed material according to claim 1, wherein the mass is narrowed in a tilting direction. 5. The sheet-shaped loosely-pressed material according to claim 1, wherein the mass is a columnar body having a horizontal upper end surface having a substantially oval shape narrowing in a tilting direction. 6. The sheet-like low-pressure material according to claim 1, wherein the flexible sheet has a transparent mesh penetrating from front to back. 7. The sheet-shaped gentle pressure according to claim 1, wherein the flexible sheet is a three-dimensional knitted fabric obtained by bridging a first knitted fabric and a second knitted fabric with elastic jumping yarns. Material. 8. A woven fabric having air permeability, obtained by processing the sheet-shaped low-pressure material according to any one of claims 1 to 7 into a desired shape.
A bedsore prevention mat formed by combining nonwoven fabric or knitted fabric as required.