JP2012241296A - Antibacterial water-absorbing sheet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent water-absorbing capability of a water-absorbing resin from being deteriorated due to an antibacterial substance, in an antibacterial water-absorbing sheet using an alkaline antibacterial agent, and also impart antibiotic properties to a surface of the antibacterial water-absorbing sheet.SOLUTION: The antibacterial water-absorbing sheet comprises: an antibacterial part that contains the alkaline antibacterial agent as a main component; a water-absorbing part that contains the water-absorbing resin; and a separation part that separates the antibacterial part from the water-absorbing part. The antibacterial part has a surface having a water-permeable structure and becomes a surface of the antibacterial water-absorbing sheet. The water-absorbing capability of the water-absorbing resin is prevented from being deteriorated due to the antibacterial substance by arranging the antibacterial part and the water-absorbing part so as to separate from each other. The surface of the antibacterial water-absorbing sheet obtains antibiotic properties by imparting water permeability to a surface of the antibacterial part and making the antibacterial part be the surface.

Description

  The present invention relates to an antibacterial water-absorbing sheet, and relates to a water-absorbing sheet that absorbs various liquids generated in daily life and production activities in addition to urine and blood, and has antibacterial properties to suppress the growth of fungi due to the absorbed water. It relates to an antibacterial water absorbent sheet.

  When a liquid containing nutrient sources such as drip from food such as urine, meat and fish is absorbed by the water absorbent resin, the water absorbent resin that has absorbed the liquid gels. In the gelled water-absorbent resin, the bacteria grow with time, and the grown bacteria produce odor components. At this time, by applying an antibacterial agent to the water-absorbent resin, the growth of bacteria can be suppressed and the generation of odor components can be suppressed.

  Conventionally, various antibacterial water-absorbing sheets obtained by adding antibacterial properties to a water-absorbing sheet using a water-absorbing resin are known. For example, an antibacterial water-absorbing sheet having a configuration in which an antibacterial substance and a water-absorbing resin are mixed, or an antibacterial water-absorbing sheet having a structure in which an antibacterial substance and a highly water-absorbing resin are separated into layers are known. Yes.

  As an antibacterial water-absorbing sheet having a structure in which an antibacterial substance and a water-absorbing resin are mixed, for example, a zeolite solid particle and a superabsorbent resin held by exchanging antibacterial metal ions and sandwiched between two films A water-absorbing sheet (Patent Document 1) having a structure held in a sterilization mat (Patent Document 2) made of a nonwoven fabric containing a highly water-absorbing polymer, an antibacterial water-absorbing material comprising a fired product of an antibacterial calcium-based ceramic compound and a water-absorbing resin There are known a sheet (Patent Document 3), a resin film (Patent Document 4) in which a water absorbing film layer impregnated with an antibacterial component of water absorbing particles is fixed.

  Further, as an antibacterial water absorbent sheet having a structure in which an antibacterial substance and a superabsorbent resin are separated into layers, for example, a non-woven sheet impregnated with a superabsorbent resin and a plastic film containing an antibacterial substance And water-absorbing sheet (Patent Document 5) with a structure integrated by spotting and laminating a water-absorbing layer on the surface of the freshness-retaining agent. A freshness-keeping sheet (Patent Document 6) is known.

JP 05-45292 (Column 3, Line 37-Column 4, Line 2) JP 01-313057 (Claims) JP 04-138165 (Claims) JP 05-124702 A (Claims) JP 07-195626 (Claims) Patent No. 2640964 (Claims)

  The inventors of the present application have found that when an alkaline antibacterial agent is used, the water absorption capacity of the water-absorbent resin is lowered due to the alkalinity of the antibacterial agent. Therefore, the antibacterial water-absorbing sheet composed of a mixture of an alkaline antibacterial substance and a water-absorbent resin reduces the water-absorbing capacity of the water-absorbent resin due to the alkalinity of the antibacterial substance and cannot perform sufficient water absorption. There's a problem.

  On the other hand, if the antibacterial water-absorbing sheet has a structure in which an antibacterial substance and a water-absorbing resin are separated in layers, the antibacterial substance and the water-absorbing resin can be separated. The problem that the water absorption capacity of the resin is reduced can be solved.

  However, the conventionally proposed structure for separating the antibacterial substance and the water-absorbing resin into layers is a structure in which the water-absorbing resin is provided in the upper layer and the antibacterial substance is provided in the lower layer. Thus, in the structure which provides a water-absorbing resin as an upper layer and an antibacterial substance as a lower layer, there exists a problem that the surface part of an antibacterial water absorbing sheet does not have antibacterial property. Therefore, when the upper water-absorbing resin absorbs the liquid containing nutrients, the lower side of the upper layer can be expected to suppress the growth of bacteria by the lower layer antibacterial agent, but the growth of the bacteria on the upper surface part of the upper layer There is a problem that the suppression effect is not expected.

  Therefore, the present invention solves the above-mentioned conventional problems, and in the antibacterial water absorbent sheet using an alkaline antibacterial agent, the antibacterial substance prevents the water absorbing ability of the water absorbent resin from being lowered, and the antibacterial water absorbent sheet The purpose is to give antibacterial properties to the surface of the skin.

  The antibacterial water-absorbing sheet of the present invention comprises an antibacterial part containing an alkaline antibacterial agent as a main component, a water-absorbing part containing a water-absorbing resin, and a separation part for separating the antibacterial part and the water-absorbing part. The surface of has a water permeability. By disposing the antibacterial part and the water absorbing part separately, the antibacterial substance prevents the water absorption capacity of the water absorbent resin from being lowered, and the antibacterial part has a water permeability, making it antibacterial. Provide antibacterial properties to the surface of the water absorbent sheet.

  The antibacterial water-absorbing sheet of the present invention can be divided into two modes: a configuration in which the antibacterial part and the water-absorbing part are separated and a structure in which the surface of the antibacterial part has water permeability.

  In the antibacterial water absorbent sheet of the present invention, the first aspect is a structure in which the antibacterial part and the water absorbent part are arranged in layers, and the second aspect is a structure in which the antibacterial part and the water absorbent part are arranged in the horizontal direction.

  In the first aspect of the present invention, the antibacterial part, the water absorption part, and the separation part are arranged in layers with the separation part interposed between the antibacterial part and the water absorption part. The separation part can be configured by placing a water-permeable sheet material with water permeability provided between the antibacterial part and the water-absorbing part. The water-permeable sheet material allows water to pass between the antibacterial part and the water-absorbing part. To separate.

  Also, one of the outer surfaces of the antibacterial water absorbent sheet is the surface opposite to the side where the antibacterial part faces the separation part, and the other surface is the side opposite to the side where the water absorption part faces the separation part. Surface. The surface of the antibacterial part has water permeability, and the surface of the water absorption part has non-water permeability. By giving water permeability to the surface of the antibacterial part, the surface of the antibacterial water absorbent sheet can be given antibacterial properties.

  In the second aspect of the present invention, the antibacterial part and the water absorption part are arranged in the horizontal direction with the separation part interposed therebetween. The separation unit separates the antibacterial unit and the water absorption unit in the horizontal direction. In addition, the antibacterial part and the water absorption part have water permeability on one surface in the same direction with respect to the horizontal direction, and water impermeability on the other surface in the same direction.

  Antibacterial water absorption by disposing the antibacterial part and the water absorption part horizontally across the separation part, making the surface of one side water-permeable and the surface of the other side impermeable to water in the horizontal direction Antibacterial properties can be imparted to the surface of the sheet.

  In the second aspect, in the antibacterial part and the water absorption part, the surface having the water permeability of the antibacterial agent and the water absorbent resin is provided with a water permeable sheet material, and the surface surface having the water permeability of the antibacterial agent and the water absorbent resin is not permeable. An aqueous sheet material is provided. A separation part can be comprised by the adhesion part of a water-permeable sheet material and a non-water-permeable sheet material.

  The 1st aspect and 2nd aspect of this invention can be set as the following forms in the structure of an antibacterial part and a water absorption part.

  The antibacterial part uses antibacterial particles containing calcium hydroxide as a main component as an alkaline antibacterial agent. As the antibacterial particles mainly composed of calcium hydroxide, for example, antibacterial particles obtained by hydrating calcined calcium formed by pulverizing shells can be used. Antibacterial particles obtained by hydrating calcined calcium suppress the growth of fungi by the antibacterial effect of hydroxide ions, and decompose and remove acidic odor components such as hydrogen sulfide and odor components such as aldehydes To do.

  Calcium hydroxide can be obtained by calcining calcium carbonate to obtain calcium oxide and then hydrating. As the calcium carbonate source, animal-derived calcium can be used. For example, scallop shells, abalone shells, tuna shells, sea urchin shells, sea shells of sea urchin shells, and shellfish shells are used as raw materials. be able to.

  As the deodorizing effect increases as the surface area per unit weight of the antibacterial particles containing calcium hydroxide as a main component increases, a powder having a small particle size is suitable.

  A water absorption part can be made into two forms. The first form of the water-absorbing part is provided with a mixture of water-absorbing resin particles and alkaline antibacterial agent particles. In the configuration in which both the particles are mixed, the particle diameter of the antibacterial agent is larger than the particle diameter of the water absorbent resin particle.

  Alkaline antibacterial agents have the property of reducing the water absorption capacity of the water-absorbent resin due to alkalinity, but in applications that do not require high water absorption capacity, the water-absorbent resin and the alkaline antibacterial agent can be directly mixed and used. . In such a case, the surface area of the antibacterial agent is relatively reduced by making the particle size of the alkaline antibacterial agent larger than the particle size of the water absorbent resin, thereby reducing the influence of lowering the water absorption capacity of the water absorbent resin.

  The structure of the first form of the water absorbing portion can suppress the growth of fungi and decompose and remove odorous components in the water absorbing portion, and reduce the water absorption capability of the water absorbing resin due to the alkaline antibacterial agent. Can be made.

  The second form of the water-absorbing part comprises a mixture of water-absorbing resin particles and non-alkaline antibacterial agent particles. In the configuration in which both the particles are mixed, the particle size of the water-absorbent resin particle and the particle size of the antibacterial agent particle are made equal. By making the water-absorbent resin particles and the antibacterial agent particles have the same particle size, it is possible to improve the kneadability of both particles and prevent the antibacterial agent from being biased in the water-absorbing part.

  As described above, according to the antibacterial water-absorbing sheet of the present invention, in the antibacterial water-absorbing sheet using an alkaline antibacterial agent, the antibacterial substance prevents the water absorbing ability of the water-absorbing resin from being lowered and has antibacterial properties. Antibacterial properties can be imparted to the surface of the water absorbent sheet.

It is a figure for demonstrating the 1st structural example of the 1st aspect of the antibacterial water absorbing sheet of this invention. It is a figure for demonstrating the 2nd structural example of the 1st aspect of the antibacterial water absorbing sheet of this invention. It is a figure for demonstrating the 3rd structural example of the 1st aspect of the antibacterial water absorbing sheet of this invention. It is a figure for demonstrating the 2nd aspect of the antibacterial water absorbing sheet of this invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
The antibacterial water absorbent sheet of the present invention includes a water absorbent resin and an antibacterial agent. The water-absorbent resin gels by absorbing a liquid containing a nutrient source such as drip from food such as urine, meat and fish. The antibacterial agent suppresses the growth of bacteria in the gelled water-absorbent resin and suppresses the generation of odor components by the grown bacteria.

  In the antibacterial water-absorbing sheet of the present invention, the first aspect is a structure in which the antibacterial part and the water-absorbing part are arranged in layers, and the second aspect is a structure in which the antibacterial part and the water-absorbing part are arranged in the horizontal direction.

  1-3 is a figure for demonstrating the 1st aspect of the antibacterial water absorbing sheet of this invention, and FIG. 4 is a figure for demonstrating the 2nd aspect of the antibacterial water absorbing sheet of this invention. .

[First embodiment of the present invention]
In the first aspect of the present invention, a water-permeable sheet material having water permeability is provided as a separation part between the antibacterial part and the water-absorbing part, and the antibacterial part and the water-absorbing part are separated in the vertical direction by this water-permeable sheet material. The antibacterial part and the water absorption part are arranged in layers, the antibacterial part is an upper layer or a lower layer, and the water absorption part is a lower layer or an upper layer. The antibacterial part and the water-absorbing part are separated into layers via a water-soluble sheet material, and the antibacterial part becomes the surface by making the antibacterial part an upper layer or a lower layer. By making the antibacterial part the surface, the surface of the antibacterial water-absorbing sheet is made antibacterial.

(First configuration example)
Drawing 1 is a figure for explaining the 1st example of composition of an antibacterial water absorption sheet of the 1st mode.
In FIG. 1, an antibacterial water absorbent sheet 1 includes an antibacterial part 2 in the upper layer and a water absorbent part 3 in the lower layer with the separation part 4 interposed therebetween. Note that, here, a configuration example in which the antibacterial part 2 is provided in the upper layer and the water absorption part 3 is provided in the lower layer is shown. The liquid penetrates into the antibacterial part 2 through the surface of the water-permeable sheet material provided in the upper layer or the lower layer of the antibacterial part 2, and further penetrates into the water-absorbing part 3 through the water-permeable sheet material of the separation part 4.

  The antibacterial part 2 includes antibacterial particles having antibacterial properties mainly composed of calcium hydroxide. Calcium hydroxide can be obtained by methods known to those skilled in the art. For example, it can be obtained by calcining calcium carbonate to obtain calcium oxide and then hydrating it.

  As the calcium carbonate source, animal-derived calcium can be used. For example, scallop shells, abalone shells, tuna shells, sea urchin shells, sea shells of sea urchin shells, and shellfish shells are used as raw materials. be able to. Among these, it is preferable to use scallop shells from the viewpoint that the shell composition is uniform and the supply amount is large.

  These shells are pulverized into shell powder (or a granular material), and are fired at 800 ° C. to 1500 ° C., more preferably 850 ° C. to 1200 ° C., for example, while introducing carbon dioxide gas. Firing may be performed in air or in an inert gas atmosphere such as nitrogen. The firing time is appropriately set depending on the firing temperature or the like, but is usually 10 to 120 minutes, preferably 15 to 90 minutes after the atmospheric temperature reaches the predetermined firing temperature. By such a baking treatment, unnecessary organic substances are removed by thermal decomposition.

  After firing, the particles are hydrated to obtain fine particles mainly composed of calcium hydroxide. In the process of firing or hydration, further pulverization is performed as necessary. The initial particle size of the particles obtained by pulverization is at most 100 μm. The particle size can be adjusted by crushing and classifying the shellfish powder to obtain a particle size of 1 μm or less. For example, fine particles having a particle size of 0.1 to 500 μm can be obtained.

  The water absorption part 3 can be formed of a water absorbent resin. Water-absorbing resins include, for example, crosslinked products of acrylate polymers, crosslinked products of hydrolysis products of starch-acrylate graft copolymers, crosslinked products of vinyl alcohol-acrylate copolymers, and maleic anhydride grafts. Examples thereof include a crosslinked product of polyvinyl alcohol, a crosslinked isobutylene-maleic anhydride copolymer, a crosslinked polyacrylic acid partial neutralized product, and a saponified product of a vinyl acetate-acrylic ester copolymer. Among these, a crosslinked product of an acrylate polymer that can absorb a large amount of liquid and can stably hold the absorbed liquid in the molecule even when a certain load is applied is preferable.

  The water-absorbing resin is generally preferably in the form of powder or granules. In the present invention, it is expressed in terms of particles including those in powder form and granular form.

  The water-absorbent resin can be produced by various methods such as reverse phase suspension polymerization and aqueous solution polymerization, as well as pulverizing, granulating or classifying as necessary. Can be prepared.

  The separation unit 4 separates the antibacterial particles in the antibacterial unit 2 and the water absorbent resin in the water absorption unit 3 and allows the liquid to pass through the water absorption unit 3. The separation unit 4 includes a water-permeable sheet material in order to pass the liquid that has passed through the antibacterial unit 2 into the water absorption unit 3. As the water-permeable sheet material of the upper sheet 5 and the water-permeable sheet material of the separation unit 4, for example, a nonwoven fabric can be used.

  The upper part of the antibacterial part 2 is covered with the upper sheet 5, and the liquid that has passed through the upper sheet 5 penetrates into the antibacterial part 2. The liquid that has penetrated into the antibacterial part 2 passes through the water-permeable sheet material of the separation part 4 and penetrates into the water absorption part 3. The liquid that has penetrated into the water absorbing portion 3 is absorbed by the water absorbent resin. The antibacterial unit 2 suppresses the growth of bacteria by the liquid that has penetrated into the water absorbing unit 3 and decomposes the odor component.

  The bottom of the water absorbing part 3 is covered with a bottom sheet 6. The bottom sheet 6 is formed of a non-water-permeable sheet material, and prevents the liquid that has penetrated into the water absorbing section 3 from leaking outside. The non-water-permeable sheet material can be formed of, for example, a resin film.

  Since the antibacterial water-absorbing sheet 1 has a configuration in which the antibacterial portion 2 is provided on the upper part, the antibacterial property of the surface can be obtained.

  The water-permeable sheet material of the separation part 4 and the upper sheet 5 can be formed of, for example, a nonwoven fabric.

  Fig.1 (a)-(c) is sectional drawing of an antibacterial water absorbing sheet, FIG.1 (d) is a schematic perspective view of the upper part of an antibacterial water absorbing sheet.

  In the configuration example shown in FIG. 1A, antibacterial particles mainly containing calcium hydroxide are provided in the antibacterial part 2. Here, by reducing the particle size of the antibacterial particles, the surface area per unit weight can be increased, and the effects of preventing the growth of bacteria and decomposing and removing odor components can be enhanced.

  In the configuration example shown in FIGS. 1B and 1C, the antibacterial part 2 includes antibacterial particles mainly composed of calcium hydroxide, and the water absorbing part 3 is also hydroxylated together with the water absorbent resin 13. Antibacterial particles mainly composed of calcium are provided.

  In the configuration example shown in FIG. 1B, the particle size of the antibacterial particles provided in the antibacterial part 2 is different from the particle size of the antibacterial particles provided in the water absorption part 3. The particle size of the antibacterial particles 11 provided in the antibacterial part 2 is similar to the configuration shown in FIG. 1A, by increasing the surface area per unit weight by reducing the particle size of the antibacterial particles, Increases the effect of preventing proliferation and decomposing and removing odor components.

  On the other hand, the particle size of the antibacterial particles 12 provided in the water absorbing portion 3 is set to be larger than that of the water absorbing resin 13 in the water absorbing portion 3. Alkaline antibacterial agents have the property of reducing the water absorption capacity of the water-absorbent resin due to alkalinity. According to the configuration of FIG. 1B, the surface area of the antibacterial particles 12 is relatively increased by making the particle size of the alkaline antibacterial particles 12 larger than the particle size of the water absorbent resin 13 in the water absorbing portion 3. The effect of reducing the water absorption capacity of the water absorbent resin 13 is reduced.

  By disposing the antibacterial particles 12 having a large particle diameter in the water absorbing part 3, the water absorption of the water absorbent resin 13 by the alkaline antibacterial particles is achieved while suppressing the growth of fungi and decomposing and removing odor components. Capability reduction can be reduced.

  In the configuration example shown in FIG. 1 (c), the non-alkaline antibacterial particles 14 are used, and the particle sizes of the antibacterial particles 14 provided in the water absorbing part 3 and the particles of the water absorbent resin 12 are made uniform.

  In the configuration in which the particles of the water absorbent resin 12 and the particles of the non-alkaline antibacterial particles 14 are mixed, the particle size (particle size) of the water absorbent resin 12 and the particle size (particle size) of the non-alkaline antibacterial particles 14 are aligned. By this, the kneadability of both particles can be improved and the bias of the antibacterial agent in the water absorption part 3 can be prevented.

  In the configuration example shown in FIGS. 1B and 1C, the antibacterial particles provided in the water-absorbing part 3 can suppress the growth of bacteria in the water-absorbing part 3 and decompose the generated odor components. .

(Second configuration example)
Drawing 2 is a figure for explaining the 2nd example of composition of the antibacterial water absorption sheet of the 1st mode. Fig.2 (a) is sectional drawing of an antibacterial water absorbing sheet, FIG.2 (b) is a schematic perspective view of the upper part of an antibacterial water absorbing sheet.

  In FIG. 2, the antibacterial water absorbent sheet 1 includes an antibacterial part 2 in the upper layer and a water absorbent part 3 in the lower layer with the separation part 4 interposed therebetween.

  The water absorbing portions 3 are provided at predetermined intervals on the bottom sheet 6 made of a non-water-permeable sheet material. The water-permeable sheet material forming the separation part 4 is bonded to the bottom sheet 6 at predetermined intervals. The water absorbing portion 3 can be formed by storing a water absorbing resin in a storage space formed by the adhesive portion 7, the bottom sheet 6, and the water-permeable sheet material.

  An upper sheet 5 is provided above the water-permeable sheet material of the separation unit 4. The antibacterial part 2 can be formed by storing antibacterial particles in a storage space formed between the water-permeable sheet material of the separation part 4 and the upper sheet 5. The water-permeable sheet material of the separation part 4 and the upper sheet 5 can be formed of, for example, a nonwoven fabric.

  The liquid that has passed through the upper sheet 5 penetrates into the antibacterial part 2. The liquid that has penetrated into the antibacterial part 2 passes through the water-permeable sheet material of the separation part 4 and penetrates into the water absorption part 3. The liquid that has penetrated into the water absorbing portion 3 is absorbed by the water absorbent resin. The antibacterial unit 2 suppresses the growth of bacteria by the liquid that has penetrated into the water absorbing unit 3 and decomposes the odor component.

  Also in the second configuration example, the antibacterial particles may be provided in the water-absorbing part 3 as in the configuration examples of FIGS.

(Third configuration example)
Drawing 3 is a figure for explaining the 3rd example of composition of the antibacterial water absorption sheet of the 1st mode. Fig.3 (a) is sectional drawing of an antibacterial water absorbing sheet, FIG.3 (b) is a schematic perspective view of the upper part of an antibacterial water absorbing sheet.

  In FIG. 3, the antibacterial water-absorbing sheet 1 includes an antibacterial part 2 in the upper layer and a water-absorbing part 3 in the lower layer with the separation part 4 interposed therebetween.

  The water-absorbing part 3 is provided on the bottom sheet 6 made of a non-water-permeable sheet material, and the antibacterial part 2 is provided on the water-permeable sheet material forming the separation part 4 at a predetermined interval. A water-permeable sheet material for the upper sheet 5 is provided above. The water-permeable sheet material of the upper sheet 5 of the antibacterial part 2 is bonded to the water-permeable sheet material of the separation part 4 at predetermined intervals. The antibacterial part 2 is formed by storing antibacterial particles in a storage space formed by the water-permeable sheet material of the adhesive part 7 and the water-permeable sheet material of the upper sheet 5.

  The water-permeable sheet material of the separation part 4 and the upper sheet 5 can be formed of, for example, a nonwoven fabric.

  The liquid that has passed through the upper sheet 5 penetrates into the antibacterial part 2. The liquid that has penetrated into the antibacterial part 2 passes through the water-permeable sheet material of the separation part 4 and penetrates into the water absorption part 3. The liquid that has penetrated into the water absorbing portion 3 is absorbed by the water absorbent resin. Further, the liquid that has passed through the bonding portion 7 also passes through the water-permeable sheet material of the separation portion 4 and penetrates into the water absorbing portion 3 and is absorbed by the water absorbing resin. The antibacterial unit 2 suppresses the growth of bacteria by the liquid that has penetrated into the water absorbing unit 3 and decomposes the odor component.

  Also in the third configuration example, the antibacterial particles may be provided in the water absorbing portion 3 as in the configuration examples of FIGS. 1B and 1C described above.

[Second embodiment of the present invention]
In the second aspect of the present invention, the antibacterial part and the water absorption part are arranged in the horizontal direction, and a separation part is provided between the two parts. The separation part separates the antibacterial part and the water absorption part in the horizontal direction. By disposing the antibacterial part and the water absorption part in the horizontal direction with the separation part sandwiched therebetween, the antibacterial part becomes the surface. By making the antibacterial part the surface, the surface of the antibacterial water-absorbing sheet is made antibacterial.

  FIG. 4 is a diagram for explaining a configuration example of the antibacterial water absorbent sheet according to the second embodiment. Fig.4 (a) is sectional drawing of an antibacterial water absorbing sheet, FIG.4 (b) is a schematic perspective view of the upper part of an antibacterial water absorbing sheet.

  In FIG. 4, the antibacterial water-absorbing sheet 1 includes an antibacterial part 2 and a water-absorbing part 3 arranged in the horizontal direction with the separation part 4 'interposed therebetween.

  The antibacterial water-absorbing sheet 1 is provided with an upper sheet 5 on a bottom sheet 6 made of a non-water-permeable sheet material, and antibacterial particles and a water-absorbing resin in a storage space formed between the bottom sheet 6 and the upper sheet 5. The antibacterial part 2 and the water absorption part 3 are formed. The separation part 4 ′ between the antibacterial part 2 and the water absorbing part 3 can be formed by an adhesive part that adheres the bottom sheet 6 and the top sheet 5. The upper sheet 5 can be formed of a water-permeable sheet material such as a nonwoven fabric.

  The liquid that has passed through the upper sheet 5 penetrates into the antibacterial part 2 and the water absorption part 3. The liquid that has penetrated into the water absorbing portion 3 is absorbed by the water absorbent resin. The antibacterial unit 2 decomposes odor components generated by the growth of bacteria by the liquid that has penetrated into the water absorption unit 3.

  Moreover, also in the 2nd aspect, it is good also as a structure which provides an antimicrobial particle in the water absorption part 3 similarly to the 1st-3rd structural example of an above described 1st aspect.

  The present invention is not limited to the embodiments described above. Various modifications can be made based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

DESCRIPTION OF SYMBOLS 1 Antibacterial water absorption sheet 2 Antibacterial part 3 Water absorption part 4 Separation part 5 Upper sheet 6 Bottom sheet 7 Adhesion part 11 Antibacterial particle 12 Antibacterial particle 13 Water absorbing resin 14 Antibacterial particle

Claims (8)

An antibacterial part containing an alkaline antibacterial agent as a main component;
A water absorbing part containing a water absorbent resin;
A separation part that separates the antibacterial part and the water absorption part,
An antibacterial water-absorbing sheet, wherein the surface of the antibacterial part has water permeability. The antibacterial part, the water absorption part and the separation part are arranged in layers with the separation part sandwiched between the antibacterial part and the water absorption part,
The separation part separates the antibacterial part and the water absorption part by a water-permeable sheet material having water permeability provided between the antibacterial part and the water absorption part,
The antibacterial part has water permeability on the surface opposite to the side facing the separation part,
The antibacterial water-absorbent sheet according to claim 1, wherein the water-absorbing part has a water-impervious surface on the side opposite to the side facing the separating part. The antibacterial part and the water absorption part are arranged in a horizontal direction across the separation part,
The separation part separates the antibacterial part and the water absorption part in a horizontal direction,
2. The antibacterial part and the water absorbing part according to claim 1, wherein one surface in the same direction with respect to a horizontal direction has water permeability and the other surface in the same direction has water permeability. Antibacterial water absorbent sheet. The antibacterial part and the water absorbing part are provided with a water permeable sheet material on the surface having water permeability,
A non-water-permeable sheet material is provided on the non-water-permeable surface of the antibacterial agent and the water-absorbent resin,
The antibacterial water-absorbent sheet according to claim 3, wherein the separation portion is constituted by an adhesion portion between the water-permeable sheet material and the water-impermeable sheet material.   The antibacterial water-absorbing sheet according to any one of claims 1 to 4, wherein the alkaline antibacterial agent in the antibacterial part is an antibacterial particle mainly composed of calcium hydroxide. The water absorbing portion comprises a mixture of water absorbent resin particles and alkaline antibacterial agent particles,
The antibacterial water-absorbing sheet according to any one of claims 1 to 5, wherein the particle diameter of the antibacterial agent particles is larger than the particle diameter of the water-absorbent resin particles. The water absorbing portion comprises a mixture of water absorbent resin particles and non-alkaline antibacterial agent particles,
The antibacterial water-absorbing sheet according to any one of claims 1 to 4, wherein the water-absorbent resin particles have the same particle size as the antibacterial agent particles.   The antibacterial particles containing calcium hydroxide as a main component are products produced by hydrating calcium oxide formed by calcining calcium carbonate. Antibacterial water-absorbent sheet as described in 1.