JP4064021B2 - Sheet-like soft material and mat - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sheet-like soft material that relieves pressure, and a floor slip prevention mat using the same.
[0002]
[Prior art]
Conventionally, for example, bedsores (decubitus) caused by pressure, friction, moisture, etc. on the skin and subcutaneous tissue have become a big problem for elderly people and sick people who are forced to sleep for a long time on a bed, for example. .
As a countermeasure against bed slip, a so-called air mat that is installed on a bed and used is known. However, since the air mat has no air permeability, it has been found that there are problems such as rash due to moisture and the like.
[0003]
Therefore, the present inventor has proposed a sheet-like flexible material that can be a material such as a floor slip prevention mat in Japanese Patent Application No. 11-141796. As shown in FIG. 15, this includes a flexible sheet 91 having a see-through 90 penetrating through the front and back, and an elastic mass 92, and the mass 92 is vented through the clear 90 in a desired pattern. The flexible sheet 91 is entangled and fixed while maintaining the properties.
The sheet-like flexible material can relieve pressure by elastic deformation of the lump 92 and has air permeability.
[0004]
Clinical trials were repeated in order to use the sheet-like flexible material as a mat for preventing bed slip. In the test, a sheet-like flexible material of the same size was laid on a hospital bed, and a sheet was laid on the upper surface so that the subject was laid down. Moreover, it carried out similarly about the case where a sheet-like flexible material is inserted into a bag-like sheet and laid on a bed. As a result, it was found that bed slip improved with an improvement rate of about 70% in 3 weeks. The reason is that the pressure on the skin and subcutaneous tissue is locally applied only to a part through the mass, there is no pressure on the other body parts, and the mass is elastically deformed so that the pressure is dispersed. It is assumed that there is. As for friction, it is presumed that the frictional force is reduced because the pressure is dispersed. Further, with respect to moisture, it is presumed that high air permeability is maintained between the lump and the transparent sheet, and so-called sweat accumulation is eliminated.
[0005]
[Problems to be solved by the invention]
The above-mentioned sheet-like flexible material is an excellent material that can relieve pressure while maintaining high air permeability, but when it is brought into contact with the human body using a floor slip prevention mat etc., if pressure is applied by putting weight on the body, etc. Since the agglomeration of individual lumps is actually felt, there remains room for improvement.
[0006]
Therefore, according to the present invention, based on the above clinical test, even when pressure is applied by contacting a human body or the like while maintaining high air permeability, the pressure is flexibly relaxed and the contact of the lump is not realized. The present invention provides a novel sheet-like soft material and a floor slip prevention mat using the same.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, a sheet-like gentle pressure material of the present invention includes a flexible sheet having air permeability, and a lump that has elasticity and has a direction of tilting when pressure is applied. The lump is fixed to the flexible sheet while maintaining air permeability in an arrangement pattern in which the lump has a different tilting direction and comes into contact with each other when tilting.
[0008]
By the above means, the lump is tilted when the lump is brought into contact with the air in a plane from different plane directions and pressure is applied to the sheet-like soft material. Further, when the lump is tilted to a certain extent, the lump is brought into contact with the adjacent lump and further tilting is suppressed.
[0009]
According to a second aspect of the present invention, as a preferred form of the arrangement pattern, the massive objects are arranged so that the tilt directions are perpendicular to each other in the neighboring massive objects. By the above means, the adjacent lump becomes a tilt stopper from the orthogonal direction.
[0010]
According to a third aspect of the present invention, as another preferable form of the arrangement pattern, the massive objects are arranged such that the tilting directions are polygonal between neighboring massive objects. By the above means, the tilting direction of the adjacent massive objects is set.
[0011]
According to a fourth aspect of the present invention, the lump is narrowed in the tilting direction. Thereby, it becomes easy to incline a lump in the direction formed narrowly.
[0012]
Further, the present invention is characterized in that the lump is a columnar body having a horizontal upper end surface that has a substantially oval shape narrowing in the tilting direction.
[0013]
According to a sixth aspect of the present invention, the flexible sheet has a through-hole penetrating the front and back. By the above means, a high air permeability is ensured through the transparent mesh.
[0014]
Further, according to a seventh aspect of the present invention, the flexible sheet is a three-dimensional knitted fabric in which a mesh-knitted first fabric and a second fabric are bridged by an elastic bridging yarn. By the above means, when the lump is tilted by pressure, the transition yarn of the three-dimensional knitted fabric is bent, so that the lump is more easily tilted. Moreover, since the lump is tilted while the lump is sinking due to the bending of the crossover yarn, an excessive pulling force is not generated at the fixed portion between the lump and the flexible sheet.
[0015]
Furthermore, an eighth aspect of the present invention is a floor slip prevention mat obtained by processing the sheet-like gentle pressure raw material into a desired shape and combining a woven fabric, a nonwoven fabric, or a knitted fabric having air permeability as necessary. Specifically, the above combination is realized by covering the sheet-like gentle pressure raw material with a bag made of the woven cloth or the like, or laminating with the woven cloth or the like.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiment (1) of this invention is demonstrated in detail based on FIGS.
As shown in FIG. 1, the sheet-like gentle pressure material 1 of the present invention is generally configured by fixing a lump 2 to a flexible sheet 3.
[0017]
The lump 2 has a tilting direction when pressure is applied. Here, “having a tilt direction” means that when a pressure is applied to the sheet-like material 1 with the lump 2 fixed to the flexible sheet 3, the lump 2 elastically deforms itself. Is tilted (inclined) means that there is a direction in which tilting is easy and a direction in which tilting is difficult.
[0018]
As shown in FIG. 2, the lump 2 is formed in a columnar body having a substantially oval upper end surface 20, and the upper end surface 20 is formed narrow in the tilt direction. That is, if the direction formed narrowly is the short axis b and the direction perpendicular thereto is the long axis a, the direction in which the mass 2 is most likely to tilt is the direction formed narrowly, that is, the direction along the short axis b. On the contrary, the direction in which it is difficult to tilt is the direction along the long axis a. Here, if the ratio of the major axis a and the minor axis b is too small, it is not preferable because the direction of tilting of the block 2 is lost. On the other hand, if the ratio is too large, the flexibility of the entire sheet-like gentle material 1 is reduced and handled. Considering these, it is preferable to set the major axis a: minor axis b = about 3: 1 to 7: 1.
[0019]
Moreover, as shown in FIG. 2, it is preferable that the upper end surface 20 of the block 2 is a substantially horizontal surface. When it is a horizontal plane, for example, when it is brought into contact with a human body, the pressure per contact area is reduced, and it is possible to suppress the feeling of contact of the block 2. Moreover, the chamfer 23 can be slightly formed in the both ends of the short axis b direction so that the upper end surface 20 may not become a corner | angular part when the lump 2 inclines.
[0020]
The dimension of the upper end surface 20 in the lump 2 is appropriately determined in consideration of the elastic modulus and shape of the lump 2 or the desired gentle pressure. In general, if the size of the upper end surface 20 is small, the lump 2 is easily deformed more than necessary due to pressure, so that the loose pressure is lowered, and the area in contact with the human body or the like is reduced, resulting in a so-called point contact state. The contact of the lump 2 is realized and is not preferable. Conversely, if the size of the upper end surface 20 is large, the lump 2 is difficult to tilt, impairing the air permeability of the flexible sheet 3 and increasing the overall weight, which is not preferable. As a specific numerical value, the area of the upper end surface 20 is 50 to 350 mm. ² Dimensions that are of the order are preferred.
[0021]
As the material of the lump 2, various materials having elasticity are used. Specific examples thereof include various elastomer resins such as urethane resin, butadiene rubber, styrene-butadiene rubber, chloroprene rubber, natural rubber, silicone gel, silicone rubber, acrylic rubber, and styrene rubber. Of these, urethane resins that are advantageous in terms of cost are preferably used.
[0022]
In fixing the lump 2 to the flexible sheet 3, the lump 2 is fixed in an arrangement pattern in which the adjacent lumpes have different tilt directions. Referring to FIG. 2, the tilting direction (arrow direction) of the block 2 </ b> A and the tilting direction (arrow direction) of the block 2 </ b> B adjacent to the block 2 </ b> A are perpendicular to each other, and the block The direction in which 2A is easily tilted corresponds to the direction in which the lump 2B is most difficult to tilt.
[0023]
The distance d1 between the lump 2A and another lump 2B adjacent thereto is such that the lump 2A and the lump 2B are separated without contacting each other when the lump 2A is not tilted, and are in contact with each other when tilted. The interval is such that Specifically, it is appropriately determined in consideration of the degree of ease of tilting determined by the elastic modulus, shape, etc. of the lump 2A, the height h at which the lump 2A protrudes from the flexible sheet 3, etc. In general, it is preferable to set the distance d1 so that the one lump 2A comes into contact with the other lump 2B when tilted by 5 to 35 °. The distances d2 to d4 are usually equal to the distance d1, but can be set differently. For example, the direction of the gentle pressure property of the sheet-like gentle pressure material can be given by increasing the distances d2 and d4 from the distances d1 and d3.
[0024]
The height h at which the lump 2A protrudes from the surface of the flexible sheet 3 varies depending on the elastic modulus and dimensions of the lump 2A, but generally, when the lump 2A is low, the lump 2A is not easily tilted and has a gentle pressure. Is unfavorable because it decreases. On the other hand, even if it protrudes too much, the lump 2A may be damaged due to repeated tilting, which is not preferable. Specifically, it is preferable to protrude about 5 to 20 mm.
[0025]
FIG. 3 is a view of the arrangement pattern of the lumps 2 in the sheet-like gentle pressure material 1 of FIG. 1 as viewed from above. By making the arrangement pattern in which the tilting directions of the block 2A and the block 2B are orthogonal to each other in this way, the wide pattern including the block 2A, the block 2B, and the gaps between them is brought into contact with the human body or the like. The region (region S represented by the area of (d4 + a + d2 + b) × (d2 + a + d1 + b) in FIG. 3) is felt as if it is in contact with each other, and it is possible to suppress the contact of individual blocks. Moreover, since the space | gap (for example, space | gap M) between massive bodies can be made wide, making it feel the contact in a wide area | region, high air permeability can be ensured.
[0026]
The ratio of the lump 2 to the surface of the flexible sheet 3, that is, the occupancy rate is not particularly limited. However, if the occupancy ratio is small, the contact with the lump 2 is caused by point contact with the human body. When the contact is actually felt, it is not preferable, 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. This is determined as appropriate in consideration of the relationship. Specifically, the occupation ratio of the lump 2 to the flexible sheet 3 is preferably in the range of 20 to 70%.
[0027]
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 a transparent mesh 30 penetrating the front and back. Here, the see-through 30 means an infinite number of holes that penetrate through the front and back of the flexible sheet 3 to such an extent that they can be seen. Therefore, for example, it is a concept that is distinguished from fine gaps existing in the weave of a woven fabric in which yarns are combined vertically and horizontally. The air permeability of the flexible sheet 3 and by extension, the sheet-like gentle pressure material 1 is ensured through the see-through 30. If the ratio of the see-through 30 to the surface of the flexible sheet 3 is small, the air permeability is lowered and unsuitable. On the contrary, if the ratio is large, the portion to which the block 2 is fixed becomes unstable and the durability is lowered. Therefore, it is determined appropriately in consideration of these. Specifically, it is preferable that the area ratio is 15 to 85%, preferably 30 to 70%.
[0028]
As the flexible sheet 3, as shown in FIG. 4, a three-dimensional knitted fabric 31 is used in which a mesh knitted first fabric 31 a and a second fabric 31 b are bridged by an elastic bridging yarn 31 c. . The three-dimensional knitted fabric 31 is also referred to as so-called “Russell knitting”, and the transition yarn 31c is made of synthetic resin filaments or an aggregate thereof, and maintains the distance between the first fabric 31a and the second fabric 31b. It has sufficient self-supporting strength. The mesh knitting that constitutes the first fabric 31a and the second fabric 31b refers to a knitted fabric having a relatively large stitch, and is a transparent that penetrates from the first fabric 31a to the second fabric 31b through the stitch. Eyes are formed. In addition, the ratio of the see-through | permeability in the three-dimensional knitted fabric 31 means a ratio when it sees through the 1st fabric 31a and the 2nd fabric 31b. Therefore, the ratio of the clear stitches of the three-dimensional knitted fabric 31 is usually smaller than the ratio of the clear stitches of the respective fabrics due to the positional deviation between the first fabric 31a and the second fabric 31b. Included in the range.
[0029]
As a method of fixing the lump 2 to the flexible sheet 3, for example, a resin material is filled in an intaglio or stencil in which a recess or a hole is formed in the arrangement pattern of the lump 2, and after squeezing it, the flexibility A method of fixing the lump 2 and the flexible sheet 3 by placing the sheet 3 and performing heat press with a relatively weak pressure can be employed. Moreover, the method etc. which adhere the lump 2 on the flexible sheet | seat 3 with an adhesive agent are selected suitably.
[0030]
The lump 2 is particularly preferably entangled and fixed with the flexible sheet 3. Here, “entangled and fixed” means that the flexible sheet 3 is integrated from the end surface or peripheral surface of the lump 2 toward the inside, and is simply integrated with the end surface of the lump 2. This is different from the case where the adhesive sheet 3 is in surface contact and bonded. Therefore, a situation in which the lump 2 is displaced or dropped on the flexible sheet 3 does not occur.
[0031]
The degree of entanglement when entangled and fixed can be controlled by adjusting the temperature, heating time, or pressure in the method of fixing by heat press. When the degree of entanglement is small, that is, when the bite of the lump 2 with respect to the flexible sheet 3 is small, the flexibility of the whole sheet-like gentle pressure raw material 1 is excellent. Further, when the degree of entanglement is increased, that is, when the lump 2 is deeply inserted into the flexible sheet 3, the lump 2 is flexible although the flexibility of the sheet-like gentle pressure material 1 is slightly reduced. Since it is firmly fixed to the conductive sheet 3, it is excellent in durability. Therefore, the conditions for fixing are appropriately determined in consideration of these balances.
[0032]
The operation when pressure is applied to the sheet-like gentle pressure material 1 configured as described above will be described with reference to FIG. As shown in FIG. 5, when pressure F is applied to the sheet-like gentle pressure material 1 in the direction of the arrow in the figure, the whole body 2 </ b> A tilts while sometimes accompanied by its own elastic deformation. Thereby, the pressure F can be flexibly relaxed not only by elastic deformation of the block 2A itself but also by tilting. In particular, since the lump 2A is more easily tilted by the bending of the crossover thread 31c, the pressure is more easily relieved. As a result, it is possible to suppress the feeling of the contact of the lump 2A when it is used to prevent bed slipping and brought into contact with the human body.
[0033]
When the lump 2A is tilted to a certain extent, it comes into contact with the adjacent lump 2B. At this time, since the tilt direction of the lump 2B is different from that of the lump 2A, the lump 2B is the same as the lump 2A. It does not tilt in the direction, and acts to suppress the lump 2A from tilting further. As a result, the inclined lump 2A does not block air permeability by covering the surface of the three-dimensional knitted fabric 31 that is a flexible sheet, and high air permeability can be maintained. Similarly, the lump 2B is elastically deformed by the pressure F, and is determined by the direction of the pressure F, the direction of the force received by the contact of the lump 2A, and the tilting direction of the lump 2B itself. Tilt to. Therefore, the pressure such as the body weight can be relaxed flexibly in the entire block including the block 2A and the block 2B, and the contact of the individual blocks can be suppressed. Moreover, the contact surface of a sheet-like gentle pressure raw material can be kept entirely smooth by suppressing the tilting of a lump or more from a certain amount. Therefore, the pressure is not concentrated, which is preferable from the viewpoint of preventing bed slip.
[0034]
Further, since the tilt of the lump 2A is suppressed to some extent, an excessive tensile force is not applied to the fixing portion N between the lump 2A and the flexible sheet 3. In particular, the pulling force applied to the fixing portion N is further reduced by the sinking in the direction in which the lump 2A is tilted and the lump 2A is tilted. As a result, there is no situation in which the lump 2A falls off the three-dimensional knitted fabric 31 which is a flexible sheet, or the lump 2A itself is damaged, and the durability of the sheet-like gentle pressure material 1 is improved. Can do.
[0035]
In the above embodiment (1), the case where the three-dimensional knitted fabric 31 is used as the flexible sheet 3 has been described, but in addition to this, as a flexible sheet having a transparent hole penetrating the front and back, A woven fabric having rough eyes such as cotton, a core, a polar, a georgette, etc., a normal non-woven fabric in which many holes are formed, or a mesh knitted knitted fabric can be used. In addition, a synthetic resin sheet / film having a large number of openings can be used as long as it has flexibility.
[0036]
In addition, various materials can be used as the flexible sheet 3 on the condition that it has air permeability. Specifically, those using animal or vegetable natural fibers, blended with synthetic fibers (for example, acetate, nylon, polyester, acrylic, vinyl chloride, polyurethane, polyvinylidene chloride, etc.), or the above Examples thereof include woven fabrics, non-woven fabrics, and knitted fabrics composed only of synthetic fibers.
[0037]
A hollow filler can be added to and dispersed in the lump 2 for the purpose of reducing the weight and adjusting the elastic modulus. Specific examples of the hollow filler include phylite (registered trademark, manufactured by Nippon Philite Co., Ltd.) and EXPANSEL (registered trademark, manufactured by Nippon Philite Co., Ltd.). Further, a foam filler or expandable beads can be added and dispersed. Specific examples include foamable resins such as polystyrene and polyvinylidene chloride. In addition, the said filler may select and use any 1 type, and may use it in combination of multiple types.
[0038]
Furthermore, various functional materials can be added to the block 2 in the form of particles or powder. For example, various ceramic materials with far-infrared radiation effect, TiO with deodorization and antibacterial effect ₂ , SiO ₂ Photocatalyst materials such as TZ, SZ, deodorizing materials such as hinokitiol, natural antibacterial agents such as hinokitiol, magnet powder with stimulating effect instead of finger pressure, chitin, chitosan, etc. that have bactericidal effects, or materials such as silver powder and copper powder, Hollow materials such as silicon boride-based ceramics that have a light weight and buffer effect, phosphor powders that have a phosphorescent effect, photochromic materials that emit and discolor light, or shell powders such as scallop powder that acts as an anti-slip material Can be mentioned. These functional materials can be added in one or more kinds.
[0039]
FIG. 6 shows an embodiment (2) of the present invention. In this case, the lump 2 is arranged so that the lump direction is a polygon between adjacent lumps. For example, regarding the six adjacent lumps 2 centering on the region C, their tilt directions (arrows in the figure) form a hexagon. With such an arrangement pattern, there is a lump that easily tilts in any direction within the surface of the sheet-like gentle pressure material surface, so that the pressure can be suitably reduced.
[0040]
In addition, it is not limited to the example of the arrangement pattern shown in the above embodiments (1) and (2), but (i) the adjacent lump objects have different tilt directions, and (ii) each other when tilting. Various arrangement patterns can be adopted as long as the condition of arrangement at the contact interval is satisfied.
[0041]
7 to 13 show the embodiments (3) to (9) of the present invention. In the embodiment (3) of FIG. 7, the block 2A is formed in the shape of a quadrangular prism, and the tilting direction is the direction of the arrow in the drawing along the direction of the short axis b formed narrowly. . The upper end surface 20 is formed horizontally, and this is the same for the following embodiments (4) to (7). The tilting direction of the block 2A and the block 2B is arranged to be orthogonal.
[0042]
Moreover, in embodiment (4) of FIG. 8, the block 2A is formed in the shape of a hexagonal column. Also in this case, the tilting direction is the arrow direction in the drawing along the direction of the short axis b formed to be narrow, and the lumps 2A and 2B are arranged so that the tilting directions are orthogonal to each other.
[0043]
Moreover, Embodiment (5) of FIG. 9 forms the block 2A in the shape of a triangular prism. The tilting direction is a direction along the short axis b formed to be narrow, but as shown by the arrow in the figure, the direction closer to the apex of the upper end surface 20 is narrower, so it is particularly easy to tilt. In FIG. 9, the block 2 </ b> A and the block 2 </ b> B are arranged so that the directions of the major axes “a” are orthogonal to each other, and the tilt directions are different.
[0044]
Further, the block 2A in the embodiment (6) of FIG. 10 is formed in a columnar body in which the shape of the upper end surface 20 is a trapezoid. In this case, it is easy to incline in the direction of arrows A and B in the drawing along the short axis b formed narrowly, but it is particularly easy to incline in the direction of arrow A among them. In addition, the lump 2A and the lump 2B are arranged so that the tilt directions are orthogonal to each other.
[0045]
Moreover, in embodiment (7) of FIG. 11, the lump 2A is formed in a columnar body whose upper end surface 20 has a semi-elliptical shape. In this case, it tends to tilt in the direction of arrows A and B along the short axis b, but it tends to tilt particularly in the direction of arrow A. As in the examples of FIGS. 10 and 11, the lump can be formed so that the direction in which it is easily tilted is asymmetric. The lump 2A and lump 2B are arranged so that the tilt directions are orthogonal.
[0046]
Furthermore, in Embodiment (8) of FIG. 12, the hollow part 21 which penetrates an upper and lower surface is formed in the lump 2A. If it does in this way, since the hollow part 21 has air permeability, the aggregate 2A can improve the air permeability of the whole, without inhibiting the air permeability of the flexible sheet 3. FIG. Moreover, when the hollow part 21 is formed, when a pressure is applied, since the lump 2A is flexible, it is easier to tilt, and the pressure can be moderated appropriately. It also contributes to the overall weight reduction. In addition, in FIG. 12, it arrange | positions so that the inclination direction (direction along the short axis b) of the lump 2A and the lump 2B which adjoins may orthogonally cross.
[0047]
Furthermore, Embodiment (9) of FIG. 13 forms the lump 2A in the hollow part 22 which does not penetrate the upper and lower surfaces. This structure reduces the overall weight as in the example of FIG. 12, makes the lump 2A more flexible, and improves the adhesion to the flexible sheet 3 compared to the example of FIG. . In addition, it is arrange | positioned so that the inclination direction (direction along the short axis b) of 2 A of blocks and 2 B of blocks may be orthogonal.
[0048]
Any one kind of lump can be used as the lump of various shapes described above, and a plurality of kinds of lump can be used in combination.
[0049]
Next, the floor slip prevention mat can be obtained by processing the above-mentioned sheet-like gentle pressure raw material into a desired shape and combining it with a woven fabric, nonwoven fabric, or knitted fabric having air permeability. As a method of processing into a desired shape, for example, a method of appropriately cutting a sheet-like gentle pressure material according to the size of the bed can be mentioned. As a method of combination, for example, as shown in FIG. 1, the sheet-like gentle pressure raw material 1 is covered with a bag 4 made of a woven fabric, a nonwoven fabric, or a knitted fabric having air permeability, or the sheet-like gentle pressure raw material is applied. For example, a method of laminating a woven fabric, a non-woven fabric, or a knitted fabric having air permeability by adhering or sewing them together is appropriately used.
[0050]
An example of using the floor slip prevention mat is shown in FIG. In FIG. 14, a floor slip prevention mat 50 formed by covering the sheet-like gentle pressure material 1 with a breathable bag 4 is attached or simply placed so as to cover the entire surface of the bed 51. Actually, since the bag 4 covers the upper surface of the sheet-like gentle pressure material 1, the sheet-like gentle pressure material 1 becomes invisible. In addition, the floor slip prevention mat 50 can be used on a part of the upper surface of the bed so as to hit a part of the human body where floor slip is likely to occur.
[0051]
Since the bed slip prevention mat 50 has high air permeability, the mat does not get stuffy due to perspiration or the like, and the surface can be kept clean even when used for a long time. It is also very comfortable because it is easy to escape heat and feels cool. Furthermore, since the lump is tilted with respect to the pressure such as body weight, the pressure can be relaxed more flexibly, and the contact of the lump is not realized. Further, when the lump is tilted to a certain extent, further tilting is suppressed, so that air permeability is not hindered and an excessive force is not applied to the lump so that the durability of the floor slip prevention mat is improved.
[0052]
As described above, the sheet-like gentle pressure material of the present invention is suitably used as a floor slip prevention mat. In addition to this, for example, sports clothes and work safety clothing linings, floor underlays, automobiles, Many seats such as bicycle seats, wheelchair seats, low back pain belts, hats, headbands, headgears, supporters, goggles bands, pillow covers, headrests, insoles, shoe cushions, helmet cushions, etc. It is an excellent material that functions effectively for applications.
[0053]
【Example】
Next, the present invention will be described in more detail with reference to examples.
Example 1
As the flexible sheet, Fusion I AKE64010 (Russell knitting at intervals of 4 mm), which is a three-dimensional knitted fabric manufactured by Asahi Kasei Co., Ltd., was used.
Moreover, Hyprene P302 (isocyanate) and Hyprene D45B (polyol) manufactured by Mitsui Chemicals, Inc. were used as materials constituting the lump. These form a urethane resin by being polymerized.
[0054]
Next, an intaglio plate having concave portions formed in a desired arrangement pattern is filled with the above-mentioned isocyanate and polyol blended in the same weight (1: 1), squeezed, and the above-mentioned three-dimensional knitted fabric is placed thereon, 0.8 kgf / cm ² The sheet was subjected to heat pressing at about 60 ° C. for about 40 minutes with force to fix the lump and the flexible sheet to obtain the sheet-like material of the present invention.
The arrangement pattern of the lump in the produced sheet-like gentle pressure material is as shown in FIG. 1, the long axis of the lump is 20 mm, the short axis is 5 mm, and the distance from the adjacent lump is Set to 3 mm. The height of the massive projecting from the three-dimensional knitted fabric was 8 mm. In addition, the hardness of the lump in the obtained sheet-like gentle pressure raw material was 45 in JIS K6301 (vulcanized rubber physical test method A type test).
[0055]
(Example 2)
The side of the sheet-like soft material obtained in Example 1 on which the lump was fixed was covered with Fusion I AKE64670 (Russell knitting with an interval of 8 mm) as a solid knitted fabric manufactured by Asahi Kasei Co., Ltd. A mat for preventing bed slip was used. Subsequently, a clinical test was conducted on the obtained bedsore prevention mat. The test was carried out by placing a bed slip prevention mat of the same size on a hospital bed and laying a sheet on the upper surface so that the subject lay down. As a result, it was found that bed slip improved with an improvement rate of about 78% in 3 weeks. This result exceeds the performance of the conventional floor slip prevention mat. Further, the same test was conducted on subjects without bed slip, and no bed slip occurred and the effect of preventing bed slip was excellent. Furthermore, most of the subjects obtained a questionnaire result indicating that the user feels comfortable use without actually feeling the contact of the lump.
[0056]
【The invention's effect】
As described above, the sheet-like gentle pressure material of the present invention tilts the lump when it is brought into contact with a human body or the like, so that the pressure can be relaxed flexibly and the lump can be felt. Is suppressed. In addition, since the arrangement pattern of the massive objects is configured so that the neighboring massive objects have different tilt directions and come into contact with each other when tilted, the tilting of the massive objects is suppressed more than a certain level, and high air permeability between the massive objects is achieved. Is maintained. Furthermore, since the tilting is suppressed, a load is not applied to the fixing portion between the lump and the flexible sheet, so that the durability is excellent.
[0057]
In particular, when a three-dimensional knitted fabric is used as the flexible sheet, the lump is more easily tilted and the pressure is relaxed more flexibly by the bending of the cross yarn, so that the feeling of the lump is further suppressed. It is done. In addition, since the lump is tilted while sinking into the three-dimensional knitted fabric, the fixed portion between the lump and the flexible sheet is not burdened, and the durability is further improved.
[0058]
In addition, the floor slip prevention mat using the above-mentioned sheet-like gentle pressure material can relieve the pressure due to body weight flexibly and does not feel the contact of the lump, so that a comfortable feeling of use can be obtained. Moreover, since high air permeability is maintained, bed slippage can be suitably prevented without causing rash.
[Brief description of the drawings]
FIG. 1 is a perspective view showing a sheet-like gentle pressure material in embodiment (1) of the present invention.
FIG. 2 is an enlarged perspective view of a sheet-like gentle pressure material in the embodiment (1) of the present invention.
FIG. 3 is a plan view of a sheet-like gentle pressure material in the embodiment (1) of the present invention.
FIG. 4 is an enlarged view of a section XX in FIG. 1;
FIG. 5 is a diagram when pressure is applied to the sheet-like gentle pressure material in the embodiment (1) of the present invention.
FIG. 6 is a plan view of a sheet-like gentle pressure material in the embodiment (2) of the present invention.
FIG. 7 is a perspective view showing a sheet-like gentle pressure material in the embodiment (3) of the present invention.
FIG. 8 is a perspective view showing a sheet-like gentle pressure material according to Embodiment (4) of the present invention.
FIG. 9 is a perspective view showing a sheet-like gentle pressure material in the embodiment (5) of the present invention.
FIG. 10 is a perspective view showing a sheet-like gentle pressure material according to Embodiment (6) of the present invention.
FIG. 11 is a perspective view showing a sheet-like gentle pressure material according to Embodiment (7) of the present invention.
FIG. 12 is a perspective view showing a sheet-like gentle pressure material according to Embodiment (8) of the present invention.
FIG. 13 is a perspective view showing a sheet-like gentle pressure material according to Embodiment (9) of the present invention.
FIG. 14 is a view showing an example of use of the floor slip prevention mat of the present invention.
FIG. 15 is a diagram illustrating a conventional example.
[Explanation of symbols]
1 Sheet-like material
2, 2A, 2B lump
20 Top surface
21, 22 Hollow part
23 Chamfering
3 Flexible sheet
30 Clear eyes
31 Three-dimensional knitted fabric
31a 1st fabric
31b 2nd fabric
31c Transition yarn
4 bags
50 Bed slip prevention mat
51 beds
90 Clear eyes
91 Flexible sheet
92 Mass
a Long axis
b Short axis
d1, d2, d3, d4 distance
h Height
S area
M gap
C area
F pressure
N fixed part

Claims (8)

A flexible sheet having air permeability and a lump that has elasticity and a tilting direction when pressure is applied, and the lump has a different tilting direction between neighboring lumps. In addition, a sheet-like material with a low pressure formed by adhering to a flexible sheet while maintaining air permeability in an arrangement pattern that contacts each other when tilted. The sheet-like gentle pressure material according to claim 1, wherein the lump is arranged so that tilting directions are orthogonal to each other between lumps adjacent to each other. The sheet-like gentle pressure material according to claim 1, wherein the lump is arranged such that the lump direction is a polygon between adjacent lumps. The sheet-like gentle pressure material according to any one of claims 1 to 3, wherein the lump is narrow in a tilting direction. The sheet-like gentle pressure material according to any one of claims 1 to 3, wherein the lump is a columnar body having a horizontal upper end surface having a substantially oval shape narrowing in a tilting direction. The sheet-like gentle pressure material according to claim 1, wherein the flexible sheet has a through hole penetrating the front and back. The sheet-like gentle pressure material according to claim 1 or 6, wherein the flexible sheet is a three-dimensional knitted fabric in which a mesh first knitted fabric and a second fabric are bridged by a flexible jump yarn. A floor slip prevention mat formed by processing the sheet-like gentle pressure raw material according to any one of claims 1 to 7 into a desired shape, and combining a woven fabric, a nonwoven fabric, or a knitted fabric having air permeability as necessary.

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