TWI593558B - A sheet of carbon dioxide - Google Patents

Description

Sheet of carbon dioxide

The present invention relates to a sheet for generating carbon dioxide, and more particularly to a sheet for producing carbon dioxide which is suitable for use in attaching to the skin, or for wiping use during cleaning. The carbon dioxide-producing sheet of the present invention can be used in the fields of cosmetics, medical parts, pharmaceuticals, cleaning articles, and miscellaneous goods.

It is known that if carbon dioxide is applied to the skin, it will promote blood circulation of the skin. Therefore, the material which produces carbon dioxide is used as a skin external preparation suitable for the skin of a face, a scalp, and other parts, such as a hand, a neck, and a foot. Further, it is known that carbon dioxide is effective in removing dirt such as protein or scale due to physical forces caused by bubbles and weakly acidic.

As a material for generating carbon dioxide, a carbon dioxide generating agent containing a carbonate and an acid is known (for example, refer to Patent Documents 1 and 2). When water such as lotion is supplied to the carbon dioxide generating agent, the carbonate and the acid react with water to generate carbon dioxide.

Patent Document 3 discloses the use of sodium hydrogencarbonate, citric acid or sodium dihydrogen citrate as a carbon dioxide generator, and a water permeable, non-woven fabric, sodium hydrogencarbonate, coarse mesh non-woven fabric, citric acid or sodium dihydrogen citrate, permeable to water. A 5-layer structure sheet-like material obtained by sequentially laminating a gas permeable non-woven fabric.

In the configuration of Patent Document 3, when the user soaks the water such as the lotion into the sheet-like material, the water is supplied to the sodium hydrogencarbonate through the water-permeable and air-permeable non-woven fabric. Citric acid or sodium dihydrogen citrate. Sodium bicarbonate and citric acid or sodium dihydrogen citrate are all dissolved in water. Then, the dissolved solution is contacted by a coarse mesh non-woven fabric, and the reaction is started to generate carbon dioxide.

Further, in the sheet-like material of Patent Document 3, for the purpose of prolonging the generation time of carbon dioxide, a water-soluble carboxymethyl group is mixed with any of sodium hydrogencarbonate, citric acid or sodium dihydrogen citrate. Cellulose (CMC).

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open Publication No. 2004-83498

[Patent Document 2] Japanese Patent No. 5531177

[Patent Document 3] Japanese Patent Laid-Open Publication No. 2014-65707

Patent Document 3 discloses that in order to allow sodium bicarbonate dissolved in water and citric acid or sodium dihydrogen citrate to easily contact and react through the gaps between the constituent fibers, the water permeability of the intermediate layer and the outer layer are disclosed. Non-woven fabrics with different weaves are not woven. In other words, in the sheet-like material of Patent Document 3, the coarse mesh nonwoven fabric in which the reaction can be easily carried out cannot be used for the outer layer based on some reason such as falling powder. Further, when the water-permeable and gas-permeable nonwoven fabric for the outer layer is used for the intermediate layer, the reactivity is deteriorated. Therefore, in Patent Document 3, there is a disadvantage that the outer layer and the intermediate layer cannot be woven with the same material or cannot be disposed on the outer layer.

Further, Patent Document 3 discloses that the generation time of carbon dioxide is prolonged by using CMC in combination with a carbon dioxide generating agent, but there is still other structure for making dioxide. Carbon production continues to be demanding.

One of the objects of the present invention is to provide a carbon dioxide-producing sheet which has a configuration different from that of Patent Document 3 and which is not easily powdered and has good reactivity.

Further, another object of the present invention is to provide a carbon dioxide-producing sheet which is excellent in the continuous effect of carbon dioxide generation.

The present invention for solving the above problems has the following aspects.

A sheet for producing carbon dioxide, comprising a laminate of a carbonate layer and an acid layer, wherein a water-permeable or water-absorbent sheet is provided between the carbonate layer and the acid layer, and the carbonate layer and the above The acid layer is obtained by disposing a mixture of carbonate particles or acid particles and a heat-fusible resin on the surface of the water-permeable or water-absorbent sheet, and melting the heat-meltable resin by heat.

2. The sheet for producing carbon dioxide according to 1. The hot-melt resin comprising a heat-melting resin selected from the group consisting of a particulate hot-melt resin, a fibrous hot-melt resin, and the like. Group of resins.

3. The sheet for producing carbon dioxide according to 1. or 2. wherein at least one of the carbonate layer and the acid layer contains a water absorbent material.

A sheet for producing carbon dioxide, comprising a laminate of a carbonate layer and an acid layer, wherein the carbonate layer and the acid layer are adjacent to each other, and at least one of the carbonate layer and the acid layer is contained A layer of absorbent material.

5. The carbon dioxide-producing sheet according to 4. wherein the carbonate layer and the acid layer contain the water-absorbing material.

6. The carbon dioxide-generating sheet according to 4. or 5. wherein the surface of at least one of the outer layers of the laminate has a water permeable or water absorbing sheet.

7. The carbon dioxide-generating sheet according to any one of items 4. to 6, which is produced by a dry method.

8. The carbon dioxide-generating sheet according to 6. or 7, wherein the water-permeable or water-absorbent sheet contains a water-absorbent material.

The carbon dioxide-producing sheet according to the present invention is characterized in that the carbonate particles contained in the carbonate layer and the acid particles contained in the acid layer are fixed to the water-permeable or water-absorbent sheet by the heat-melting resin. In the surface and/or the layer of the carbonate layer and the acid layer, the phenomenon of falling powder in which the carbonate particles and the acid particles are peeled off from the sheet is less likely to occur.

Another aspect of the present invention for producing carbon dioxide is provided with a laminate of a carbonate layer and an acid layer, wherein a carbonate layer and an acid layer are adjacent to each other, and at least one of the carbonate layer and the acid layer contains a water absorbent material. Layer.

In the layer containing the water-absorbing material, the carbonate or acid may be dispersed in the thickness direction of the layer by the presence of the water-absorbing material. Further, the water absorbing material allows the water to slowly permeate. Therefore, when a sheet for generating carbon dioxide is used, the time at which the reaction between the carbonate and the acid starts can be increased, and as a result, the generation of carbon dioxide in the entire sheet in which carbon dioxide is generated can be continuously increased.

Further, in the layer containing the water absorbent material, particularly when the water absorbent material is fibrous, the carbonate or the acid is easily maintained in the layer due to the presence of the water absorbent material. Further, since the carbon dioxide-producing sheet contains a water-absorbent material in the carbonate layer and/or the acid layer, it is easy to maintain the shape. Therefore, the yield of carbonate and/or acid can be improved at the time of production, storage, and use of the sheet in which carbon dioxide is produced, and at the same time, when it is deformed by folding or the like, powder falling can be prevented. Thereby, the loss of the carbon dioxide generating agent can be prevented, which contributes to cost reduction. Moreover, according to the choice of the water-absorbing material itself, the cost can also be achieved. reduce.

1‧‧‧ net forming device

10‧‧‧ conveyor

11‧‧‧ Roll

13‧‧‧carbonate particles

16‧‧‧Hot-melting resin

20‧‧‧ breathable endless belt

23‧‧‧ Acid particles

30‧‧‧Fiber mixture supply means

40‧‧‧1st carrier sheet supply means

41‧‧‧1st carrier sheet

50‧‧‧2nd carrier sheet supply means

51‧‧‧Second carrier sheet (third carrier sheet)

60‧‧‧Inhalation box

100‧‧‧carbonate layer containing water-absorbing material

120‧‧‧carbonate layer without water-absorbing material

130‧‧•carbonate layer

200‧‧‧Acid layer containing water-absorbing material

220‧‧‧Acid layer without water-absorbing material

230‧‧‧ acid layer

300, 500‧‧‧ water-permeable or absorbent sheets

400‧‧‧film

A‧‧‧Air network

Fig. 1 (a) to (d) are views showing a configuration example of a sheet for generating carbon dioxide according to a first aspect of the present invention.

2(a) to 2(f) are views showing a configuration example of a sheet for generating carbon dioxide according to a second aspect of the present invention.

Fig. 3 is a schematic view showing a net forming apparatus usable in the method for producing a carbon dioxide-producing sheet of the present invention.

Embodiments of the present invention will be described below with reference to the drawings, but the present invention is not limited to the embodiments.

[1st aspect]

The layer constitution and the effect of the carbon dioxide-producing sheet according to the first aspect of the present invention will be described with reference to Fig. 1 .

<Sheet that produces carbon dioxide>

A sheet for generating carbon dioxide according to a first aspect of the present invention includes a laminate of a carbonate layer and an acid layer, wherein a water permeable or water absorbing sheet is provided between the carbonate layer and the acid layer, and the carbonate layer is provided. Further, the acid layer is obtained by disposing a mixture of carbonate particles or acid particles and a heat-fusible resin on the surface of the water-permeable or water-absorbent sheet, and melting the heat-fusible resin by heat. In the carbonate layer, the carbonate particles are fixed in a state in which a part of them are covered with a heat-fusible resin. Similarly, in the acid layer, the acid The particle system is fixed in a state in which a part of it is covered with a heat-melting resin. The carbon dioxide-generating sheet of the present invention is produced by a dry method in order to prevent a reaction between a carbonate and an acid in the production step.

(layer structure and effect)

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a view showing the constitution of a carbon dioxide-producing sheet according to a first aspect of the present invention, by way of non-limiting example. In the figures, the same symbols denote the same constituent elements. Regarding the same constituent elements, the case where the repeated explanation is omitted will be omitted.

The carbon dioxide-generating sheet according to the first aspect of the present invention shown in Fig. 1(a) has a water-permeable or water-absorbent sheet 300, a carbonate layer 130, a water-permeable or water-absorbent sheet 300, and an acid layer 230. A structure in which a water permeable or water absorbing sheet 300 is sequentially laminated. The carbonate layer 130 is a layer formed by disposing a mixture of the carbonate particles 13 and the heat-fusible resin 16 on the surface of the water-permeable or water-absorbent sheet 300 and thermally melting the heat-meltable resin 16 . Further, the acid layer 230 is a layer formed by disposing a mixture of the acid particles 23 and the heat-fusible resin 16 on the surface of the water-permeable or water-absorbent sheet 300 and thermally melting the heat-meltable resin 16 .

In the configuration of Fig. 1(a), in the carbonate layer 130, the carbonate particles 13 are fixed in a state in which a part thereof is covered with a heat-fusible resin. Therefore, the carbonate particles 13 are less likely to be dropped from the sheet in which carbon dioxide is generated, and when the sheet in which carbon dioxide is produced is used, the water can be brought into contact with the carbonate. Since the hot-melt resin and the carbonate particles are uniformly dispersed, the carbonate particles can be uniformly disposed in the plane.

Similarly, in the acid layer 230, the acid particles 23 are fixed in a state in which a part thereof is covered with a heat-fusible resin. Therefore, the acid particles 23 are less likely to be dropped from the sheet in which carbon dioxide is generated, and when the sheet producing carbon dioxide is used, the moisture can be used. Contact with acid. Since the heat-melting resin and the acid particles are uniformly dispersed, the acid particles can be uniformly disposed in the plane.

Further, since the water permeable or water absorbing sheet 300 is provided on the upper surface of the coated carbonate layer 130 and the acid layer 230, it is possible to further reduce the possibility that the carbonate or the acid is dropped from the carbon dioxide generating sheet. Further, the water permeable or water absorbing sheet 300 corresponding to the outer layer of the sheet which generates carbon dioxide is not essential in the present invention.

The carbon dioxide-generating sheet shown in Fig. 1(b) is a water-permeable or water-absorbent sheet 300 which is provided on the upper surface of the carbonate layer 130 and the acid layer 230 in the configuration shown in Fig. 1(a). One of them is constructed by replacing the film 400 having a relatively low gas permeability. In the configuration of the film 400 having a low gas permeability on one side, in addition to the same effects as those shown in Fig. 1(a), it is possible to prevent or suppress the release of carbon dioxide generated during use from the side of the film arrangement side. effect. Therefore, by applying the surface on the side opposite to the surface on the side of the film arrangement to the skin, the carbon dioxide can be directionally concentrated and/or applied to the skin for a long time.

Further, for example, one or both of the carbonate layer 130 and the acid layer 230 may further contain a water absorbent material.

The carbon dioxide-generating sheet shown in Fig. 1(c) has a water permeable or water absorbing sheet 300, a carbonate layer 100 containing a water absorbing material, a water permeable or water absorbing sheet 300, an acid layer 230, and The water permeable or water absorbing sheet 300 is sequentially laminated. The carbonate layer 100 containing a water-absorptive material is further disposed on the surface of the water-permeable or water-absorbent sheet 300 in addition to the mixture of the carbonate particles 13 and the heat-fusible resin 16, by making the heat-melting property. A layer formed by the step of thermally melting the resin 16. In the carbonate layer 100 containing a water-absorptive material, the carbonate particles 13 and the absorbent material are fixed in a state in which a part of the carbonate particles 13 are covered with the heat-meltable resin 16.

The carbon dioxide-generating sheet shown in Fig. 1(d) has a water permeable or water absorbing sheet 300, an acid layer 200 containing a water absorbing material, a water permeable or water absorbing sheet 300, a carbonate layer 130, and The film 400 having a gas permeability relatively lower than that of the water permeable or water absorbing sheet 300 is sequentially laminated. The acid layer 200 containing the water-absorptive material is further disposed on the surface of the water-permeable or water-absorbent sheet 300 in addition to the mixture of the acid particles 23 and the heat-fusible resin 16, via the heat-melting resin 16 A layer formed by the step of hot melting. In the acid layer 200 containing a water-absorptive material, the acid particles 23 and the absorbent material are fixed in a state in which a part of the acid particles 23 are covered with the heat-fusible resin 16.

In FIG. 1(c) and FIG. 1(d), although only one of the carbonate layer and the acid layer is formulated with an absorbent material, the absorbent material may be blended in both layers. In this way, by the configuration in which the water-absorbent material is further formulated in the carbonate layer and/or the acid layer, in addition to the same effects as those shown in FIG. 1(a) or FIG. 1(b), carbonate and acid are used. It can be dispersed in the thickness direction of the layer by the presence of the water-absorbing material. Further, the water absorbing material allows the water to slowly permeate. Therefore, when a sheet for generating carbon dioxide is used, the reaction start time between the carbonate and the acid can be made to have a range, and as a result, the carbon dioxide generation of the entire sheet in which carbon dioxide is generated can be continuously increased.

Further, in the layer containing the water absorbent material, particularly when the water absorbent material is fibrous, the carbonate or the acid is easily maintained in the layer due to the presence of the water absorbent material. Further, the sheet in which carbon dioxide is produced is easily maintained in shape by containing a water-absorbent material in the carbonate layer and/or the acid layer. Therefore, in the production, storage, and use of a sheet in which carbon dioxide is produced, the yield of carbonate and/or acid can be improved, and at the same time, in the case of deformation such as folding, powder falling can be prevented. Thereby, the loss of the carbon dioxide generating agent can be prevented, which contributes to cost reduction. Moreover, according to the choice of the water-absorbing material itself, it can also be achieved. This cut.

The configuration of the carbon dioxide-producing sheet according to the first aspect of the present invention is described above using Figs. 1(a) to (d). However, these are merely examples, and other configurations or combinations of the components are also included in the scope of the present invention.

For example, the carbon dioxide-generating sheets shown in Figs. 1(a) to (d) respectively contain a plurality of layers of water-permeable or water-absorbent sheets 300, but these layers may not be the same material.

For example, the water-permeable or water-absorbent sheet 300 corresponding to the intermediate layer in the sheet for generating carbon dioxide may be a water-permeable or water-absorbent sheet 500 (not shown) having high water retention and releasing the water inside. . In the configuration in which the water-permeable or water-absorbent sheet 500 having high water retention property is disposed between the carbonate layer 130 and the acid layer 230, the moisture of the lotion or the like applied to one side can be slowly infiltrated into another layer during use. one side. Thereby, the reaction start time of the carbonate and the acid can be made to have a range, and the carbon dioxide of the entire sheet of carbon dioxide can be continuously generated. Further, the outer layer water permeable or water absorbing sheet 300 may be the same material as the water permeable or water absorbing sheet 500 having a high water retention property for the intermediate layer.

(carbonate layer)

The carbonate layer is a layer containing carbonates and/or bicarbonates.

As the carbonate or bicarbonate, when it is used as a cosmetic, it can be used without limitation if it is a grade that can be used in cosmetics, and it is not particularly specified when it is used for other uses. For example, sodium carbonate, sodium hydrogencarbonate, sodium sesquicarbonate, potassium carbonate, potassium hydrogencarbonate, calcium carbonate, magnesium carbonate, magnesium carbonate, calcium carbonate or a derivative thereof can be used. Two or more kinds of carbonates and/or bicarbonates may be used in combination. Carbonic acid The salt and/or bicarbonate is a solid composition, preferably in the form of, for example, a particle. The carbonate and/or bicarbonate may be in the form of, for example, a carrier supported on ceria. Further, the carbonate and/or bicarbonate may also contain water in the form of crystal water. When crystal water is contained, the solubility in water becomes high, and the reactivity improves. Among them, from the viewpoint of storage stability, the carbonate layer preferably does not contain water which is a cause of deterioration such as hydrolysis or initiation of reaction with an acid. The carbonate or bicarbonate used in the present invention is preferably a particle having an average particle diameter of 5 to 5000 μm. When the average particle diameter is 5 to 5000 μm, the particles are less likely to fall off and have a moderate graininess, and a good feeling of use can be obtained.

The carbonate layer may further contain a heat-fusible resin in addition to the carbonate and/or bicarbonate particles. At this time, the carbonate and/or bicarbonate particles are fixed in the carbonate layer, and a part thereof is fixed by the heat-melting resin. Such a carbonate layer is, for example, a mixture of carbonate and/or bicarbonate particles and a heat-fusible resin on the surface of another layer constituting a sheet for generating carbon dioxide, and the heat-melting resin is melted by heat. Can be formed.

(acid layer)

The acid layer is a layer containing a solid acid.

As the acid, when it is used as a cosmetic, it can be used without limitation if it is a grade that can be used in cosmetics, and it is not particularly specified when it is used for other uses. For example, malonic acid, maleic acid, citric acid, malic acid, tartaric acid, succinic acid, fumaric acid, hyaluronic acid, sodium dihydrogen phosphate or a derivative thereof, a substance which hydrolyzes to generate an acid, or the like can be used. Two or more kinds of acids may be used in combination. The acid is a solid composition, and is preferably in the form of, for example, a particle. Further, the acid may also contain water in the form of water. When crystal water is contained, the solubility in water is increased, and the reactivity is also improved. Among them, from the viewpoint of storage stability, the acid layer preferably does not contain water which is a cause of deterioration such as hydrolysis or initiation of a reaction with a carbonate. The acid used in the present invention is preferably a particle having an average particle diameter of 5 to 5000 μm. When the average particle diameter is 5 to 5000 μm, the particles are less likely to fall off and have a moderate graininess, and a good feeling of use can be obtained. When the average particle diameter is decreased, the dissolution rate is increased, and the reaction progresses immediately after being wetted by water, so that the amount of CO ₂ gas generated in the initial stage of use increases. Moreover, when used on the skin, the graininess can be reduced. On the other hand, when the average particle diameter is increased, since the dissolution proceeds slowly when it comes into contact with water, there is an effect of prolonging the duration of generation of carbon dioxide. Moreover, by increasing the average particle diameter, there is an effect that particle shedding is reduced.

The acid layer may further contain a heat-fusible resin in addition to the acid particles. At this time, the acid particles are attached to the acid layer, and a part thereof is fixed in a state in which it is covered with the heat-melting resin. Such an acid layer is formed, for example, on one surface of another layer constituting a sheet for generating carbon dioxide, and a mixture of acid particles and a heat-fusible resin is disposed, and the heat-melting resin is melted by heat.

(hot melt resin)

The hot-melt resin of the present invention functions as a fixed binder in a state in which a carbonate particle or an acid particle is partially coated in a carbonate layer and/or an acid layer. The heat-fusible resin is uniformly mixed with carbonate particles or acid particles, for example, and is disposed on one surface of another layer constituting the carbon dioxide-generating sheet, and is melted by heating to be in the carbonate layer and/or the acid layer. The carbonate particles or the acid particles are fixed in a state in which a part thereof is covered. The heat-fusible resin may be in the form of particles, fibers, or any other form. The heat-fusible resin is preferably in the form of particles from the viewpoint of uniform mixing with the carbonate particles or the acid particles in the layer forming step. Also, by the plural carbonate particles or From the viewpoint of bonding between the plurality of acid particles, it is desirable to be fibrous, and the heat-fusible resin may be in the form of, for example, chopped fibers. Various shapes of hot melt resins can also be used in combination.

Examples of the heat-fusible resin include low-density polyethylene (PE) having a melting point of 95 ° C to 130 ° C, high-density polyethylene having a melting point of 120 ° C to 140 ° C, and a melting point of 160 ° C to 165 ° C. Polypropylene (PP) composed of a homopolymer or a block copolymer, polypropylene composed of a copolymer having a melting point of 135 ° C to 150 ° C, and a low melting point of a melting point of 110 ° C to 190 ° C Ethylene phthalate (PET), low melting point polyamine with a melting point of 100-130 ° C, low melting point polylactic acid with a melting point of 110 ° C ~ 150 ° C, polysuccinic acid stretching with a melting point of 115 ° C Butyl ester and the like. A thermoplastic resin having a melting point exceeding 110 ° C can be preferably used in the present invention. The heat-fusible resin may be used in combination of two or more kinds.

When the heat-fusible resin is fibrous, the fineness of the heat-fusible fiber is preferably from 1 dtex to 120 dtex, more preferably from 1 dtex to 85 dtex. Further, the average fiber length of the heat-fusible fiber is preferably from 1 to 100 mm, more preferably from 1 to 60 mm, still more preferably from 2 to 30 mm. When the fineness of the heat-fusible fiber and the average fiber length are in the above range, the formation of the mesh layer is easy, and a uniform adhesive force or a dispersed state is easily obtained.

When the heat-fusible resin is in the form of particles, the average particle diameter of the heat-meltable particles is preferably from 1 to 1,000 μm, more preferably from 10 to 800 μm. The average particle diameter of the heat-fusible resin can be appropriately selected within the range of the carbonate and acid particles used for incomplete coating.

(composite of hot melt resin)

The hot-melt resin may be a composite of two or more components. For example, a core-sheath fiber in which a resin having a different melting point is composited, a side by side fiber in which a resin having a cross section perpendicular to the longitudinal direction is used, a core-shell particle having a core and a shell, and the like can be used. Among these, since the dissimilar resin can be easily composited, it is preferred to use a core-sheath fiber.

As the core sheath fiber, it is preferred to use a core sheath fiber in which the melting point of the sheath portion is lower than the melting point of the core portion. For example, a core portion comprising a polypropylene fiber (melting point of 160 ° C) and a sheath portion made of polyethylene (melting point 130 ° C) formed on the outer periphery of the core portion may be used. .

Further, as other core sheath fibers, for example, PET/low melting point PET composite core sheath fibers, high density polyethylene/low density polyethylene composite core sheath fibers, polyethylene/low melting point PET composite core sheath fibers, and poly Indoleamine/low melting point polyamidamine composite core sheath fiber, polylactic acid/low melting point polylactic acid composite core sheath fiber, polylactic acid/polysuccinic acid butyl acrylate composite core sheath fiber, and the like.

In general, the sheath fibers of the core sheath have a melting point of more than 110 ° C, and such core sheath fibers are suitable for use in the present invention.

In the carbon dioxide-producing sheet of the present invention, in the case where the core sheath fiber having a melting point of the sheath portion lower than the melting point of the core portion is used, if it is heated to a temperature above the melting point of the sheath portion and lower than the melting point of the core portion, Then, the resin of the sheath portion is melted, and the resin of the core portion maintains the shape. Thereby, the molten resin showing the sheath portion retains the carbonate and/or bicarbonate in the carbonate layer, and/or maintains the acid in the acid layer, and at the same time, the structure composed of the water absorbent material and the fiber of the core portion The effect that the constituents stick to each other. Therefore, the carbon dioxide-generating sheet of the present invention can secure the voids in the sheet and impart strength to the sheet, and can provide a sheet which is soft and excellent in strength.

The composite of the above two components or more is capable of providing thermal fusion properties due to the presence of a heat-melting resin exposed to the outside, and exhibits a function as a binder. Therefore, these composite systems can be formulated as the heat-melting resin in the present invention.

(absorbent material)

In the first aspect of the invention, at least one of the carbonate layer and the acid layer may contain a water absorbent material. As the water-absorbent material, natural fibers such as wood pulp, hemp, cotton, ray, wool, and mineral fibers, recycled fibers such as enamel, and synthetic fibers such as polylactic acid and nylon can be used. The water absorbent material can be used, for example, in the form of defibrated chopped fibers. Two or more types of water absorbing materials may be used in combination. Further, as the water absorbent material, an auxiliary agent in the form of particles such as water absorbent resin particles can be used. Examples of the water absorbent resin particles include carboxymethyl cellulose, polyvinyl alcohol, and a polymer absorbent (SAP).

The carbonate or acid can be dispersed in the layer by the presence of a water-absorbing material. Further, the absorbent material of the present invention is used in contact with water and carbonate or acid dissolved in water when using a sheet which produces carbon dioxide, and can be slowly released, thereby producing carbon dioxide. The moisture in the sheet is slowly infiltrated. Therefore, when the sheet for generating carbon dioxide is used, the reaction start time between the carbonate and the acid can be made to have a magnitude, and as a result, the duration of generation of carbon dioxide in the entire sheet in which carbon dioxide is generated can be increased.

(effect accelerator)

The carbon dioxide-producing sheet of the present invention can be blended with one or more kinds of effect promoters in accordance with the use thereof.

Examples of the effect accelerator include an oil base, a moisturizer, a touch enhancer, a surfactant, a polymer, a viscosity increasing gel, a solvent, a propellant, an antioxidant, a reducing agent, an oxidizing agent, and a preservative. , antibacterial agents, chelating agents, pH adjusters, acids, alkalis, powders, inorganic salts, UV absorbers, whitening agents, vitamins and their derivatives, anti-inflammatory agents, anti-inflammatory agents, hair growth agents, blood circulation promotion Agent, stimulant, hormone, anti-wrinkle agent, anti-aging agent, compacting agent, cold feeling agent, temperature sensitive agent, Wound treatment accelerators, stimulating mitigators, analgesics, cell activators, plants, animals, microbial extracts, itch inhibitors, keratin stripping agents, lysing agents, sweating agents, cooling agents, astringents, enzymes, nucleic acids, spices, Pigments, colorants, dyes, pigments, metal-containing compounds, unsaturated monomers, polyols, polymer additives, anti-inflammatory analgesics, antifungals, antihistamines, hypnotic sedatives, neuroleptics, antihypertensive agents, Antihypertensive diuretic, antibiotics, anesthetics, antibacterial substances, antiepileptics, coronary vasodilators, crude drugs, adjuvants, humectants, astringents, adhesion promoters, adhesion-imparting substances, antipruritic agents, keratin softening and stripping Agent, oily raw material, ultraviolet blocker, antiseptic and bactericide, antioxidant, liquid matrix, fat-soluble substance, polymer carbonate, additive, metal soap, etc.

The effect enhancer can be formulated, for example, in one or both of the carbonate layer and the acid layer. Also, it can be added to other layers.

(water permeable or water absorbing sheet)

As the water-permeable or water-absorbent sheet 300, any sheet having a moisture-passing property (water permeability) and a sheet having moisture-absorbing properties (water absorption) can be used. As a sheet having a moisture-passing property (water permeability), there is no limitation if water can pass. As the sheet having water absorbing property (water absorbing property), a sheet which can take in moisture and retain it while releasing internal moisture can be used. That is, the sheet having water absorbing property (water absorbing property) which can be applied to the present invention can be said to be one which has a moisture-passing property (water permeability). The water-permeable or water-absorbent sheet 300 is a method for measuring the sedimentation speed prescribed in the specification of JIS L1907, and the water absorption rate measured is 60 seconds or shorter, more preferably 30 seconds or shorter. Alternatively, the water absorption (or water permeable) speed measured by the dropping method defined in the JIS L1907 standard is 60 seconds or shorter, more preferably 30 seconds or shorter. Water permeability or water absorption The lower the water absorption of the sheet 300, the faster the water passing rate, and the reaction between the carbon dioxide-derived carbonate and the acid using the carbon dioxide is rapidly progressed, and carbon dioxide can be generated in a concentrated manner in a short period of time. Further, the higher the water absorbing property (water retaining power) of the water-permeable or water-absorbent sheet 300, the more delayed the reaction between the carbonate and the acid starts, so that the carbon dioxide generation of the entire carbon dioxide-producing sheet can be prolonged. . The water permeable or water absorbing sheet 300 may be, for example, a non-woven fabric, cloth, or other sheet having a mesh structure, and may be a special nonwoven fabric such as CLAF (registered trademark).

As the water-permeable or water-absorbent sheet 500 having high water retention property, any sheet having a property of being able to release the moisture absorbed by the internal moisture or the inside can be used.

In addition, for the purpose of imparting creativity or using a wiping as a cleaning article, it is also possible to apply a surface treatment such as unevenness to the surface of the water-permeable or water-absorbent sheet which is the outer layer in the carbon dioxide-producing sheet.

By using a thicker sheet or a low-density sheet as the water-permeable or water-absorbent sheet used for the surface, it is possible to have an effect of reducing the graininess which occurs on the outer surface of the sheet which produces carbon dioxide. On the other hand, if a thin sheet or a sheet having high water permeability and high gas permeability is used, moisture permeation from the surface of the carbon dioxide-producing sheet and release of carbon dioxide generated to the outside are not hindered, and it is easy to obtain The immediate effect of carbon dioxide production. The water permeable or water absorbing sheet is appropriately selected depending on the purpose or purpose.

(film)

As the film 400, other layers having a softness which can be applied along the skin or a curved surface when using a sheet which generates carbon dioxide, and a sheet having a gas permeability higher than that of carbon dioxide can be used, in particular, a water permeable or water absorbing sheet 300 Relatively low any film.

The lower the gas permeability of the film, the higher the effect of preventing/suppressing the carbon dioxide generated by the film-forming side when the sheet for generating carbon dioxide is used. Therefore, by applying the surface on the opposite side to the surface on the side of the film arrangement to the skin or the portion to be cleaned, it is possible to exert an effect of applying carbon dioxide to the skin or the application site intensively and/or for a long period of time. On the other hand, if the gas permeability is low, the sultry heat during use is liable to occur, so that the film may have moderate gas permeability. For example, the air permeability measured by the "Test method for fabrics of fabrics and knitted fabrics" specified in Japanese Industrial Standards JIS L1096:2010 is preferably 200 cm ³ /cm ² /s or less, more preferably 150 cm ³ /cm ² /s. The following film. This air permeability is the amount of air permeating the film per unit area per unit time when a predetermined pressure is applied, and the larger the value, the higher the gas permeability. The penetration of carbon dioxide can be made directional by using a film which is more gas permeable than the sheet which produces carbon dioxide, especially a film having a relatively low water permeable or water absorbing sheet.

The film may, for example, be a resin film such as polyester, polyvinyl alcohol, polyethylene, polypropylene, or a composite film of polyethylene and polypropylene.

(content ratio of each component)

The carbonate and acid in the carbon dioxide-producing sheet are preferably used in chemical equivalents from the viewpoint of cost, but in view of the influence on the skin, the amount of acid may be excessively adjusted, and the pH after the reaction may be adjusted. It is about 5. Further, depending on the difference in solubility caused by the cause of the particle size of the carbonate and the acid, the case where the preferred ratio of the carbonate and the acid is different may be appropriately adjusted.

In the respective layers of the carbonate layer and the acid layer, the content ratio (mass basis) of the carbonate or the acid to the heat-melting resin may be, for example, 2/98 to 98/2, and may be 5/95 to 95/5. Can be 10/90~90/10. If the ratio is in the above range, a sheet of carbon dioxide can be produced. The carbonate and acid in the in-plane direction are uniformly blended to suppress falling powder.

In the case where the water absorbing material is further contained in each of the stratified layers of the carbonate layer and the acid layer, the content ratio (mass basis) of the carbonate or the acid and the heat fused resin to the absorbing material may be, for example, 2/49/49. ~96/2/2, which can be 6/47/47~94/3/3, which can be 10/45/45~90/5/5. When the ratio is in the above range, the carbonate and the acid can be uniformly disposed in the in-plane direction of the sheet in which carbon dioxide is generated, and can be dispersed in the layer by the presence of the water-absorbent material. Further, the absorbent material of the present invention is used in contact with water and carbonate or acid dissolved in water when the sheet for generating carbon dioxide is used, and can be slowly released, so that carbon dioxide can be produced. The water is slowly infiltrated into the sheet. Therefore, when the sheet for generating carbon dioxide is used, the reaction start time between the carbonate and the acid can be made to have a magnitude, and as a result, the duration of generation of carbon dioxide generated as a whole of the carbon dioxide-generating sheet can be increased.

Further, one or a plurality of effect promoters may be blended in an appropriate amount in one or a plurality of layers of the carbonate layer, the acid layer, and the other layers.

(base weigh)

The basis weight of the sheet in which carbon dioxide is produced can be appropriately set in accordance with the use. It is preferably, for example, 30 to 300 g/m ² .

<Method for Producing Sheet Producing Carbon Dioxide>

The method for producing a carbon dioxide-producing sheet according to the first aspect of the present invention includes, for example, disposing acid particles or carbonate particles on a carrier sheet for conveying a mesh layer, such as polyethylene (PE). a homogeneous mixture of a resin, on which a layer of a water-permeable or water-absorbent sheet is laminated, and further, carbonate particles or acid particles are disposed thereon A method in which a carrier sheet is placed on a uniform mixture of a heat-melting resin such as polyethylene (PE), and a heat-melting resin is melted by heat treatment. At this time, a carbon dioxide-generating sheet having the layered structure of the first aspect of the present invention can be obtained by using the water-permeable or water-absorbent sheet of the present invention on the carrier sheet. Further, in one of the carrier sheets, any film having a gas permeability lower than that of the other layers can be used, and a carbon dioxide-generating sheet having the layer constitution of the first aspect of the invention can be obtained. The carrier sheet is not essential in the present invention, and may be removed from the formed laminate after the above heat treatment. In order to prevent the reaction of the carbonate with the acid during the production, in the present invention, the laminates are carried out by a dry method. Moreover, as another embodiment, for example, there is a method of using a net forming apparatus using an air laid method.

(Manufacturing method of carbon dioxide-producing sheet by air-laid method)

The method for producing a carbon dioxide-producing sheet according to the present embodiment using the air-laid method has a defibrating step, a mixing step, a web forming step and a bonding step.

(de-fibration step)

The defibrating step is a step of defibrating the heat-melting resin in the form of chopped fibers by air flow to obtain defibrated chopped fibers.

The defibration method of the chopped fibers by the air flow is to form an air flow by a blower or the like, and the air flow is supplied to the chopped fibers, and the fiber is defibrated by the stirring effect of the air flow.

As the defibration method, it is preferred to defibrate by the swirling air flow. According to the defibrating method using the air flow of the maneuver, the chopped fibers can be fully defibrated, and the defibrated chopped fibers can be further improved when the airlaid web is formed by the airlaid method. Dispersion.

As a defibration method using the air flow of the swirling, for example, a method in which a chopped fiber is introduced into a blower and defibrated by a blower is used. Further, for example, a method in which air is blown in a cylindrical container by a blower to form a swirling flow in the circumferential direction, and a chopped fiber is supplied to the swirling flow, and the fiber is agitated to be defibrated.

The flow rate of the air stream is appropriately selected in accordance with the amount of chopped fibers, and is usually in the range of 10 to 150 m/sec.

(mixing step)

The mixing step is a step of mixing a heat-melting resin in the form of a chopped chopped fiber with a carbonate or an acid to obtain a mesh material. At the same time, any other material can be mixed. The shape of any other material may be fibrous or particulate. As an example of any other material, an auxiliary agent added as needed, such as a water absorbing resin particle or an effect accelerator, etc. are mentioned. The order of addition of these materials is not particularly limited, or these materials may be added by, for example, scattering or the like in the step after the mixing step.

In order to increase the dispersibility of the defibrated chopped fibers during mixing, it is preferred to stir the defibrated chopped fibers with a carbonate or an acid. Among them, in order to prevent breakage of the defibrated chopped fibers, stirring using mechanical shearing force is not used, and stirring using an air flow is preferably applied.

The mixing step can be followed by a defibrating step or simultaneously with the defibrating step. In the case where the mixing step is set to be the same as the defibration step, the defibrated chopped fibers are mixed with the carbonate or acid by the air flow in the defibrating step. Further, in the particle dispersing step to be described later, a powder of carbonate or acid may be mixed into the production line of the defibrated chopped fibers.

(net formation step)

The web forming step is a step of obtaining an airlaid web from the web material by an airlaid method. Here, the airlaid method is a method in which a fiber is three-dimensionally randomly stacked by an air flow to form a net.

(particle scattering step)

The particle dispersing step is a step of formulating a powder to a web material by a known method. Any one of a method in which a fiber is mixed with a powder to form a net, or a method in which a surface of a net or a carrier is dispersed may be used.

In the mesh forming step of this embodiment, for example, the mesh forming apparatus 1 shown in Fig. 3 is used. This net forming apparatus 1 includes a conveyor 10, a gas permeable endless belt 20, a fiber mixture supply means 30, a first carrier sheet supply means 40, a second carrier sheet supply means 50, and a suction box 60.

Here, the conveyor 10 is composed of a plurality of rollers 11. The gas permeable endless belt 20 is attached to the conveyor 10 for rotation. The fiber mixture supply means 30 supplies the fiber mixture with the air stream to the gas permeable endless belt 20. The first carrier sheet supply means 40 supplies the first carrier sheet 41 to the gas permeable endless belt 20. The second carrier sheet supply means 50 supplies the second carrier sheet 51 to the first carrier sheet 41 which has passed through the gas permeable endless belt 20. The suction box 60 is a gas permeable endless belt 20 that is attracted by the inside.

In the net forming apparatus 1, the fiber mixture supply means 30 is provided above the gas permeable endless belt 20, and the first carrier sheet supply means 40 is provided upstream of the gas permeable endless belt 20, and the second carrier sheet supply means 50 series is arranged in a more transparent The gas-free endless belt 20 is further downstream.

In the net forming step in which the above-described net forming apparatus 1 is used, each of the rolls 11 is rotated in the same direction, whereby the conveyor 10 is driven to rotate the gas permeable endless belt 20. Further, the first carrier sheet 41 is fed from the first carrier sheet supply means 40 in such a manner as to contact the gas permeable endless belt 20.

Next, the gas permeable endless belt 20 is sucked by the suction box 60, and the fiber mixture is lowered by the fiber mixture supply means 30, and the first carrier sheet 41 is dropped and accumulated on the gas permeable endless belt 20 by the fiber mixture. on. Thereby, the airlaid web A is formed.

Next, the second carrier sheet 51 is supplied to the airlaid web A by the second carrier sheet supply means 50 to obtain a laminated sheet containing the airlaid web.

(bonding step)

From the standpoint of not using water to bond it, the bonding method is preferably a thermal bonding method. The bonding step by the thermal bonding method is a step of heat-treating the air-laid web to bond the defibrated chopped fibers to each other by a heat-melting resin.

The heat treatment of the air-laid web may be, for example, hot air treatment or infrared irradiation treatment, and from the viewpoint of low cost of the apparatus, hot air treatment is preferred.

The hot air treatment may be, for example, a method of heat-treating the air-laid web in contact with a through-air dryer having a rotating drum having a circumferential mask gas permeability (hot air circulating rotating drum method); or passing the air-laid web through box drying. A method of heat treatment by a hot air passing through an air-laid web (hot air circulation furnace method) or the like.

As in the case of the present embodiment, when the airlaid web is held by the first carrier sheet and the second carrier sheet to form a laminated sheet, the laminated sheet may be directly subjected to the laminated sheet. Hot air treatment. The first carrier sheet and the second carrier sheet can be peeled off by the airlaid web after hot air treatment. The heat treatment temperature may be a temperature at which the heat-melting resin is melted. For example, in the case of using a material such as PP or PE which is generally used in a thermal bonding method, it is preferred to set the heating temperature to 115 ° C or higher.

After the bonding step, the thickness and density of the sheet which produces carbon dioxide are finely adjusted, and the heat treatment may be performed by a heating roller.

(Effect)

In the above production method, the carbonate or acid particles can be uniformly blended with the heat-melting resin. Therefore, gas can be uniformly generated in the in-plane direction of the sheet.

The carbonate or the acid is fixed by the heat-melting resin, and the carbonate or acid in the sheet which generates carbon dioxide can be firmly fixed as a binder by the heat-melting resin, so that the powder can be prevented from falling.

[Second aspect]

The layer constitution and the effect of the carbon dioxide-generating sheet according to the second aspect of the present invention will be described with reference to Fig. 2 . The same configurations as those of the first aspect are omitted.

<Sheet that produces carbon dioxide>

A carbon dioxide-producing sheet according to a second aspect of the present invention includes a laminate of a carbonate layer and an acid layer, wherein a carbonate layer and an acid layer are adjacent to each other, and at least one of the carbonate layer and the acid layer contains a water-absorbent material. Layer. The carbon dioxide-generating sheet according to the second aspect of the present invention is produced by a dry method in order to prevent a reaction between a carbonate and an acid in the production step.

(layer structure and effect)

Fig. 2 is a view showing the constitution of a carbon dioxide-generating sheet according to a second aspect of the present invention, by way of non-limiting example. In the figures, the same symbols denote the same constituent elements. Regarding the same constituent elements, the case where the repeated explanation is omitted will be omitted.

2(a) and 2(b) show an example in which one of the carbonate layer and the acid layer is a layer containing a water absorbent material, and the other is a layer containing no water absorbent material.

Specifically, the carbon dioxide-generating sheet shown in Fig. 2(a) has an acid layer 200 containing a water-absorbent material, a carbonate layer 120 containing no water-absorbent material, and a water-permeable or water-absorbent sheet 300. The composition of the layers in sequence. Further, the carbon dioxide-generating sheet shown in Fig. 2(b) has a carbonate layer 100 containing a water-absorbent material, an acid layer 220 containing no water-absorbent material, and a water-permeable or water-absorbent sheet 300 in order. The composition of the layers.

In the configuration of FIGS. 2(a) and (b), since one of the carbonate layer and the acid layer contains a water-absorbing material, the distribution of carbonate or acid in the thickness direction of the layer is expanded, and at the same time, it can be used. Allows moisture to penetrate slowly. Thereby, the reaction start time between the carbonate and the acid can be made to have a magnitude. Further, the carbon dioxide generation of the entire sheet in which carbon dioxide is generated can be continuously increased.

In the configuration of Fig. 2 (a) and (b), the water permeable or water absorbing sheet 300 is contained on the surface. Therefore, when used, water such as a lotion can be sufficiently penetrated to promote the reaction of the carbonate with the acid. Further, since the water-permeable or water-absorbent sheet 300 is provided so as to cover the upper surfaces of the layers 120 and 220 which do not contain the water-absorbent material, it is possible to prevent the carbonate or acid from being dropped from the carbon dioxide-generating sheet. Still, the water permeable or water absorbing sheet 300 is not an essential requirement of the present invention.

Fig. 2(c) shows an example in which both the carbonate layer 100 and the acid layer 200 are layers containing a water absorbent material. Since both the carbonate layer and the acid layer contain a water-absorbent material, the distribution of the carbonate or acid in the thickness direction of the layer is expanded, and at the same time, the water can be gradually infiltrated during use. Thereby, the reaction start time between the carbonate and the acid can be made to have a magnitude. Further, the carbon dioxide generation of the entire sheet in which carbon dioxide is generated can be continuously increased.

2(d) and (e) show an example in which the water permeable or water absorbing sheet 300 is further laminated on one side or two areas as shown in Fig. 2(c). Since the water permeable or water absorbing sheet 300 is contained on the surface, water such as a lotion can be sufficiently penetrated or retained at the time of use, and the reaction between the carbonate and the acid can be promoted. Further, in the case where the carbon dioxide-generating sheet of the present invention contains a plurality of layers of the water-permeable or water-absorbent sheet 300, these are not necessarily the same materials. In the case where the sheet 300 is provided on the surface, since the acid or the alkali is prevented from directly contacting the skin, it has an effect of buffering the irritation caused by the acid or the alkali.

The carbon dioxide-generating sheet shown in Fig. 2(f) is a structure shown in Fig. 2(d), and a film 400 having a relatively low gas permeability is provided on the surface of the water-permeable or water-absorbent sheet 300. example.

In the configuration of Fig. 2(f), since the film 400 having a relatively low gas permeability is provided on one side, it is possible to prevent or suppress the release of carbon dioxide generated during use from the side of the film arrangement side. Therefore, by applying the surface on the side opposite to the surface on the side of the film arrangement to the skin, carbon dioxide can be applied to the skin intensively and/or for a long period of time.

The constitution of the carbon dioxide-generating sheet of the present invention is described above using Figs. 2(a) to (f). However, these are exemplified, and other configurations, for example, the relationship between the carbonate and the acid in the drawings are reversed, and are also included in the scope of the present invention.

(carbonate layer)

The carbonate layer is a layer containing carbonates and/or bicarbonates. As a carbonate or a bicarbonate, when it is used as a cosmetic, if it is a grade which can be used for cosmetics, it can use it without limitation, and when it is used for another use, the grade is not specifically defined. For example, sodium carbonate, sodium hydrogencarbonate, sodium sesquicarbonate, potassium carbonate, potassium hydrogencarbonate, calcium carbonate, magnesium carbonate, magnesium carbonate, calcium carbonate or a derivative thereof can be used. Two or more kinds of carbonates and/or bicarbonates may be used in combination. The carbonate and/or bicarbonate is a solid composition, and is preferably in the form of, for example, a particle. The carbonate and/or bicarbonate may be in the form of, for example, a carrier supported on ceria. Further, the carbonate and/or bicarbonate may also contain water in the form of crystal water. When crystal water is contained, the solubility in water becomes high, and the reactivity improves. Among them, from the viewpoint of storage stability, the carbonate layer preferably does not contain water which causes deterioration such as hydrolysis or initiation of reaction with an acid. The carbonate layer may contain a heat-fusible resin or an effect promoter in addition to the carbonate and/or bicarbonate. The carbonate or bicarbonate used in the present invention is preferably a particle having an average particle diameter of 5 to 5000 μm. When the average particle diameter is 5 to 5000 μm, the particles are less likely to fall off and have a moderate graininess, and a good feeling of use can be obtained.

(acid layer)

The acid layer is a layer containing a solid acid. As the acid, when it is used as a cosmetic, it can be used without limitation if it is a grade that can be used in cosmetics, and it is not particularly specified when it is used for other uses. For example, malonic acid, maleic acid, citric acid, malic acid, tartaric acid, succinic acid, fumaric acid, hyaluronic acid, sodium dihydrogen phosphate or a derivative thereof, a substance which hydrolyzes to generate an acid, or the like can be used. Two or more kinds of acids may be used in combination. The acid is a solid composition, and is preferably in the form of, for example, a particle. Further, the acid may also contain water in the form of crystal water. When crystal water is contained, the solubility in water becomes high, and the reactivity improves. Among them, from the viewpoint of storage stability, the acid layer preferably does not contain water which causes hydrolysis or causes deterioration of the reaction with the carbonate. The acid layer may contain a heat-fusible resin or an effect promoter in addition to the solid acid. The acid used in the present invention is preferably a particle having an average particle diameter of 5 to 5000 μm. When the average particle diameter is 5 to 5000 μm, the particles are less likely to fall off and have a moderate graininess, and a good feeling of use can be obtained. When the average particle diameter is decreased, the dissolution rate is increased, and the reaction progresses immediately after being wetted by water, so that the amount of CO ₂ gas generated in the initial stage of use increases. Moreover, when used on the skin, the graininess can be reduced. On the other hand, when the average particle diameter is increased, since the dissolution proceeds slowly when it comes into contact with water, there is an effect of prolonging the duration of carbon dioxide generation. Moreover, by increasing the average particle diameter, there is an effect that particle shedding is reduced.

(layer containing water-absorbing material)

In the first aspect of the invention, it is described that at least one of the carbonate layer and the acid layer may further contain a water absorbent material. On the other hand, in the second aspect of the present invention, at least one of the carbonate layer and the acid layer contains a water absorbent material as a necessary constituent element. The layer containing the water absorbent material is a layer containing the water absorbent material in the second aspect of the present invention.

(absorbent material)

As the water-absorbing material, natural fibers such as wood pulp, hemp, cotton, ray, wool, and mineral fibers, recycled fibers such as enamel, polylactic acid, nylon, polyvinyl alcohol (PVA), and polymer absorbent fibers (SAF) can be used. ) such as synthetic fibers. The water absorbent material can be used, for example, in the form of defibrated chopped fibers. Two or more types of water absorbing materials may be used in combination. Again, as water absorption As the material, an auxiliary agent in the form of particles such as water-absorbent resin particles can also be used. Examples of the water absorbent resin particles include carboxymethyl cellulose, polyvinyl alcohol, and a polymer absorbent (SAP).

The carbonate or acid can be dispersed in the layer by the presence of the water-absorbent material, and its distribution spreads in the thickness direction. Further, the absorbent material of the present invention is used in contact with water and carbonate or acid dissolved in water when using a sheet which produces carbon dioxide, and can be slowly released, thereby producing carbon dioxide. The moisture in the sheet is slowly infiltrated. Therefore, when the sheet for generating carbon dioxide is used, the reaction start time between the carbonate and the acid can be made to have a magnitude, and as a result, the duration of generation of carbon dioxide in the entire sheet in which carbon dioxide is generated can be increased.

(effect accelerator)

The carbon dioxide-producing sheet of the present invention can be blended with one or more kinds of effect promoters in accordance with the use thereof.

Examples of the effect accelerator include an oil base, a moisturizer, a touch enhancer, a surfactant, a polymer, a viscosity increasing gel, a solvent, a propellant, an antioxidant, a reducing agent, an oxidizing agent, and a preservative. , antibacterial agents, chelating agents, pH adjusters, acids, alkalis, powders, inorganic salts, UV absorbers, whitening agents, vitamins and their derivatives, anti-inflammatory agents, anti-inflammatory agents, hair growth agents, blood circulation promotion Agents, stimulants, hormones, anti-wrinkle agents, anti-aging agents, tightening agents, cold-sensing agents, temperature-sensing agents, wound treatment accelerators, stimulating emollients, analgesics, cell activators, plants, animals, microbial extracts Antipruritic agent, keratin peeling ‧ Dissolving agent, sweating agent, cooling agent, astringent, enzyme, nucleic acid, perfume, pigment, coloring agent, dye, pigment, metal-containing compound, unsaturated monomer, polyol, polymer Additives, anti-inflammatory analgesics, anti-fungals Agent, antihistamine, hypnotic sedative, mental stabilizer, antihypertensive agent, antihypertensive diuretic, antibiotic, anesthetic, antibacterial substance, antiepileptic, coronary vasodilator, crude drug, adjuvant, humectant , astringent, tackifier, adhesion-imparting substance, antipruritic agent, keratin softening stripper, oily raw material, ultraviolet blocker, antiseptic, anti-oxidant, liquid matrix, fat-soluble substance, high molecular carbonate, Additives, metal soaps, etc.

The effect enhancer can be formulated, for example, in one or both of the carbonate layer and the acid layer. Also, it can be added to other layers.

(hot melt resin)

The heat-fusible resin of the present invention is an adhesive resin that bonds a water-absorbent material and a carbonate or acid. Further, the hot-melt resin has an effect of imparting strength to a sheet in which carbon dioxide is generated, and the shape is easily maintained.

The heat-fusible resin may be in the form of fibers or in the form of particles. From the viewpoint of further improvement in strength, the heat-fusible resin is preferably fibrous. The heat-fusible resin may also be in the form of, for example, chopped fibers.

Examples of the heat-fusible resin include low-density polyethylene (PE) having a melting point of 95 ° C to 130 ° C, high-density polyethylene having a melting point of 120 ° C to 140 ° C, and a melting point of 160 ° C to 165 ° C. Polypropylene (PP) composed of a homopolymer or a block copolymer, polypropylene composed of a copolymer having a melting point of 135 ° C to 150 ° C, and a low melting point of a melting point of 110 ° C to 190 ° C Ethylene phthalate (PET), low melting point polyamine with a melting point of 100-130 ° C, low melting point polylactic acid with a melting point of 110 ° C ~ 150 ° C, polysuccinic acid stretching with a melting point of 115 ° C Butyl ester and the like. A thermoplastic resin having a melting point exceeding 110 ° C can be preferably used in the present invention. The heat-fusible resin may be used in combination of two or more kinds.

When the heat-fusible resin is fibrous, the fineness of the heat-fusible fiber is preferably from 1 dtex to 120 dtex, more preferably from 1 dtex to 85 dtex. Further, the average fiber length of the heat-fusible fiber is preferably from 1 to 100 mm, more preferably from 1 to 60 mm, still more preferably from 2 to 30 mm. When the fineness of the heat-fusible fiber and the average fiber length are in the above range, the formation of the mesh layer is easy, and a uniform adhesive force or a dispersed state is easily obtained.

When the heat-fusible resin is in the form of particles, the average particle diameter of the heat-meltable particles is preferably from 1 to 1,000 μm, more preferably from 10 to 800 μm. The average particle diameter of the heat-fusible resin can be appropriately selected within the range of the carbonate and acid particles used for incomplete coating.

(composite of hot melt resin)

The heat-fusible resin may be a composite of two or more components. For example, a core-sheath fiber in which a resin having a different melting point is composited, a side-by-side fiber in which a resin having a cross section perpendicular to the longitudinal direction is used, a core-shell particle having a core and a shell, and the like can be given. Among these, the core sheath fiber is suitably used because the dissimilar resin can be easily combined.

As the core sheath fiber, it is suitable to use a core sheath fiber in which the melting point of the sheath portion is lower than the melting point of the core portion. For example, a core portion comprising a polypropylene fiber (melting point of 160 ° C) and a sheath portion made of polyethylene (melting point 130 ° C) formed on the outer periphery of the core portion may be used. .

Further, as other core sheath fibers, for example, PET/low melting point PET composite core sheath fibers, high density polyethylene/low density polyethylene composite core sheath fibers, polyethylene/low melting point PET composite core sheath fibers, and poly Indoleamine/low melting point polyamidamine composite core sheath fiber, polylactic acid/low melting point polylactic acid composite core sheath fiber, polylactic acid/polysuccinic acid butyl acrylate composite core sheath fiber, and the like. In general, the core sheath fibers have a melting point of more than 110 ° C, and such core sheath fibers are suitable for use in the present invention.

In the carbon dioxide-producing sheet of the present invention, the case where the sheath portion has a melting point lower than the melting point of the core portion, if heated to a temperature above the melting point of the sheath portion and lower than the melting point of the core portion, Then, the resin of the sheath portion is melted, and the resin of the core portion maintains the shape. Thereby, the molten resin showing the sheath portion retains the carbonate and/or bicarbonate in the carbonate layer, and/or maintains the acid in the acid layer, and at the same time, the structure composed of the water absorbent material and the fiber of the core portion The effect that the constituents stick to each other. Therefore, the carbon dioxide-generating sheet of the present invention can secure the voids in the sheet and impart strength to the sheet, and can provide a sheet which is soft and excellent in strength.

(water permeable or water absorbing sheet)

As the water-permeable or water-absorbent sheet 300, any sheet having a moisture-passing property (water permeability) and a sheet having moisture-absorbing properties (water absorption) can be used. As a sheet having a moisture-passing property (water permeability), there is no limitation if water can pass. As the sheet having water absorbing property (water absorbing property), a sheet which can take in moisture and retain it while releasing internal moisture can be used. That is, the sheet having water absorbing property (water absorbing property) which can be applied to the present invention can be said to be one which has a moisture-passing property (water permeability). The water-permeable or water-absorbent sheet 300 is a method for measuring the sedimentation speed prescribed in the specification of JIS L1907, and the water absorption rate measured is 60 seconds or shorter, more preferably 30 seconds or shorter. Alternatively, the water absorption (or water permeable) speed measured by the dropping method defined in the JIS L1907 standard is 60 seconds or shorter, more preferably 30 seconds or shorter. The water permeable or water absorbing sheet 300 is such that the lower the water absorbing property, the faster the water passing rate is, and the reaction of the carbon dioxide-derived carbonate-based carbonate with the acid is rapidly performed, and carbon dioxide can be generated in a concentrated manner in a short period of time. Further, the higher the water absorbing property (water retaining power) of the water-permeable or water-absorbent sheet 300, the more delayed the reaction between the carbonate and the acid starts, so that a sheet of carbon dioxide can be produced. The overall duration of carbon dioxide production has increased. The water permeable or water absorbing sheet 300 may be, for example, a non-woven fabric, cloth, or other sheet having a mesh structure, and may be a special nonwoven fabric such as CLAF (registered trademark).

In addition, for the purpose of imparting creativity or cleaning as a cleaning material, it is also possible to perform surface treatment such as unevenness on the surface of the outer layer of the water-permeable or water-absorbent sheet in the carbon dioxide-producing sheet. By using a thicker sheet or a low-density sheet as the water-permeable or water-absorbent sheet used for the surface, it is possible to have an effect of reducing the graininess which occurs outside the sheet which generates carbon dioxide. On the other hand, if a thin sheet or a sheet having high water permeability and high gas permeability is used, moisture permeation from the surface of the carbon dioxide-producing sheet and release of carbon dioxide generated to the outside are not hindered, and it is easy to obtain The immediate effect of carbon dioxide production. The water permeable or water absorbing sheet is appropriately selected depending on the purpose or purpose.

(film)

As the film 400, other layers having a softness which can be applied along the skin or a curved surface when using a sheet which generates carbon dioxide, and a sheet having a gas permeability higher than that of carbon dioxide can be used, in particular, a water permeable or water absorbing sheet 300 Relatively low any film.

The lower the gas permeability of the film, the higher the effect of preventing/suppressing the carbon dioxide generated by the film-forming side when the sheet for generating carbon dioxide is used. Therefore, by applying the surface on the opposite side to the surface on the side of the film arrangement to the skin or the portion to be cleaned, it is possible to exert an effect of applying carbon dioxide to the skin or the application site intensively and/or for a long period of time. On the other hand, if the gas permeability is low, the sultry heat during use is liable to occur, so that the film may have moderate gas permeability. For example, the air permeability measured by the "Test method for fabrics of fabrics and knitted fabrics" specified in Japanese Industrial Standard JIS L1096:2010 is preferably 150 cm ³ /cm ² /s or less, more preferably 200 cm ³ /cm ² /s. The following film. This air permeability is the amount of air permeating the film per unit area per unit time when a predetermined pressure is applied, and the larger the value, the higher the gas permeability. The penetration of carbon dioxide can be made directional by using a film which is more gas permeable than the sheet which produces carbon dioxide, especially a film having a relatively low water permeable or water absorbing sheet.

The film may, for example, be a resin film such as polyester, polyvinyl alcohol, polyethylene, polypropylene, or a composite film of polyethylene and polypropylene.

(content ratio of each component)

The carbonate and acid in the carbon dioxide-producing sheet are preferably used in chemical equivalents from the viewpoint of cost, but in view of the influence on the skin, the amount of acid may be excessively adjusted, and the pH after the reaction may be adjusted. It is about 5. Further, depending on the difference in solubility caused by the cause of the particle size of the carbonate and the acid, the case where the preferred ratio of the carbonate and the acid is different may be appropriately adjusted.

In each of the respective layers of the carbonate layer and the acid layer, the content ratio (mass basis) of the carbonate or the acid to the heat-melting resin may be, for example, 2/98 to 98/2, and may be 5/95 to 95/5. It is 10/90~90/10. When the ratio is in the above range, the carbonate and the acid in the in-plane direction of the sheet in which carbon dioxide is generated can be uniformly blended, and the powder falling can be suppressed.

In the case where the water absorbing material is further contained in each of the respective layers of the carbonate layer and the acid layer, the content ratio (mass basis) of the carbonate or the acid and the heat-fusible resin to the absorbing material may be, for example, 2/49/49~ 96/2/2, which can be 6/47/47~94/3/3, which can be 10/45/45~90/5/5. When the ratio is in the above range, the carbonate and the acid can be uniformly disposed in the in-plane direction of the sheet in which carbon dioxide is generated, and can be dispersed in the layer by the presence of the water-absorbent material. Moreover, the absorbent material of the present invention is in a sheet which produces carbon dioxide. When it is used, it is contacted with water and carbonate or acid dissolved in water, and is absorbed and maintained. On the other hand, it can be slowly released, so that the water can be slowly infiltrated in the sheet in which carbon dioxide is generated. Therefore, when the sheet in which carbon dioxide is produced is used, the reaction start time between the carbonate and the acid can be increased, and as a result, the duration of generation of carbon dioxide in the entire sheet in which carbon dioxide is generated can be increased.

Further, one or a plurality of effect promoters may be blended in an appropriate amount in one or a plurality of layers of the carbonate layer, the acid layer, and the other layers.

(base weigh)

The basis weight of the sheet in which carbon dioxide is produced can be appropriately set in accordance with the use. It is preferably, for example, 30 to 300 g/m ² .

<Method for Producing Sheet Producing Carbon Dioxide>

As a method for producing a carbon dioxide-producing sheet according to a second aspect of the present invention, for example, a method of producing a layer containing a water-absorbent material by a web forming apparatus using an air-laid method and laminating another layer may be used. As such a method, a uniform mixture of acid particles or carbonate particles and a colloidal binder particle such as polyethylene (PE) is disposed on the surface of a layer containing a carbonate or an acid and containing a water absorbent material. A method in which a heat-melting adhesive is melted and joined. Alternatively, when a layer containing a water absorbent material is produced by a web forming apparatus using an air laid method, the water permeable or water absorbing sheet of the present invention can be used for a carrier sheet for transporting the mesh layer to form a laminate. A carbon dioxide-producing sheet having the layered structure of the second aspect of the present invention can also be obtained. Further, each layer of the separately produced carbon dioxide-producing sheet may be joined by embossing or heat sealing. Also, there are joints of the layers of the sheet of carbon dioxide. At least one of the faces is provided with an adhesive layer, a method of joining the layers, and the like. In order to prevent the reaction of the carbonate with the acid during the production, in the present invention, the laminates are carried out by a dry method.

Further, in the carbon dioxide-producing sheet of the present invention produced by laminating by a dry method, the acid particles and the carbonate particles may be present in a particle state in each of the respective layers. Therefore, the carbon dioxide-generating sheet of the present invention suppresses the reaction between the two components due to moisture in the surrounding environment, and is excellent in stability and storage stability as compared with the configuration in which the acid particles and the carbonate particles are disposed in the same layer.

(Manufacturing method of carbon dioxide sheet using airlaid method)

The method for producing a carbon dioxide sheet according to this embodiment by the air-laid method has a defibrating step, a mixing step, a web forming step and a bonding step.

(de-fibration step)

The defibrating step is a step of defibrating the material of the chopped fiber form by deactivating the air stream to obtain a fiber-cut chopped fiber.

The defibration method of the chopped fibers by the air flow is to form an air flow by a blower or the like, and the air flow is supplied to the chopped fibers, and the fiber is defibrated by the stirring effect of the air flow.

As the defibration method, it is preferred to defibrate by the swirling air flow. According to the defibrating method using the air flow of the swirling, the chopped fibers can be sufficiently defibrated, and when the airlaid web is formed by the airlaid method, the dispersibility of the defibrated chopped fibers can be further improved.

As a defibration method using the air flow of the swirling, for example, a method in which a chopped fiber is introduced into a blower and defibrated by a blower is used. Also, for example, borrow A method in which air is blown in a cylindrical container by a blower to form a swirling flow in the circumferential direction, and chopped fibers are supplied to the swirling flow, and stirred to be defibrated.

The flow rate of the air stream is appropriately selected in accordance with the amount of chopped fibers, and is usually in the range of 10 to 150 m/sec.

(mixing step)

The mixing step is a step of mixing a water-absorbent material in the form of a chopped chopped fiber with a carbonate or an acid to obtain a web material. At the same time, any other material can be mixed. The shape of any other material may be fibrous or particulate. As an example of any other material, an auxiliary agent added as needed, such as a heat-fusible resin, a water-absorbent resin particle, and an effect accelerator, etc. are mentioned. The order of addition of these materials is not particularly limited, or these materials may be added by, for example, scattering or the like in the step after the mixing step.

In order to increase the dispersibility of the defibrated chopped fibers during mixing, it is preferred to stir the defibrated chopped fibers with other materials. Among them, in order to prevent breakage of the defibrated chopped fibers, it is not a stirring using mechanical shearing force, and it is preferred to apply agitation using an air flow.

The mixing step can be performed after the defibrating step or simultaneously with the defibrating step. In the case where the mixing step is set to be the same as the defibrating step, the defibrated chopped fibers are mixed with any material by the air flow in the defibrating step. Further, in the particle dispersing step to be described later, arbitrary particles may be added to the mesh forming line of the defibrated chopped fibers and mixed.

(net formation step)

The step of forming the net is a step of obtaining an airlaid web from the raw material of the net by an airlaid method. Step. Here, the airlaid method is a method in which a fiber is three-dimensionally randomly stacked by an air flow to form a net.

(particle scattering step)

The particle dispersing step is a step of formulating a powder to a web material by a known method. Any means of forming a web by mixing the powder with the fibers, or spreading the surface of the web or the carrier sheet may be used.

In the mesh forming step of this embodiment, for example, the mesh forming apparatus 1 shown in Fig. 3 is used. This net forming apparatus 1 includes a conveyor 10, a gas permeable endless belt 20, a fiber mixture supply means 30, a first carrier sheet supply means 40, a second carrier sheet supply means 50, and a suction box 60.

Here, the conveyor 10 is composed of a plurality of rollers 11. The gas permeable endless belt 20 is attached to the conveyor 10 for rotation. The fiber mixture supply means 30 supplies the fiber mixture with the air stream to the gas permeable endless belt 20. The first carrier sheet supply means 40 supplies the first carrier sheet 41 to the gas permeable endless belt 20. The second carrier sheet supply means 50 supplies the second carrier sheet 51 to the first carrier sheet 41 which has passed through the gas permeable endless belt 20. The suction box 60 is intended to attract the gas permeable endless belt 20 from the inside thereof.

In the net forming apparatus 1, the fiber mixture supply means 30 is provided above the gas permeable endless belt 20, and the first carrier sheet supply means 40 is provided upstream of the gas permeable endless belt 20, and the second carrier sheet supply means The 50 series is placed downstream of the gas permeable endless belt 20.

In the web forming step using the above-described net forming apparatus 1, the rolls 11 are rotated in the same direction, thereby driving the conveyor 10 to rotate the gas-permeable endless belt 20 turn. Further, the first carrier sheet 41 is fed by the first carrier sheet supply means 40 so as to be in contact with the gas permeable endless belt 20.

Next, the gas permeable endless belt 20 is sucked by the suction box 60, and the fiber mixture is lowered by the fiber mixture supply means 30, and the first carrier sheet 41 is dropped and accumulated on the gas permeable endless belt 20 by the fiber mixture. on. Thereby, the airlaid web A is formed.

Next, the second carrier sheet 51 is supplied to the airlaid web A by the second carrier sheet supply means 50 to obtain a laminated sheet containing the airlaid web.

(bonding step)

From the standpoint of not using water to bond it, the bonding method is preferably a thermal bonding method. The bonding step by the thermal bonding method is a step of heat-treating the air-laid web to bond the defibrated chopped fibers to each other by a heat-melting resin.

The heat treatment of the air-laid web may be, for example, hot air treatment or infrared irradiation treatment, and from the viewpoint of low cost of the apparatus, hot air treatment is preferred.

The hot air treatment may be, for example, a method of heat-treating the air-laid web in contact with a through-air dryer having a rotating drum having a circumferential mask gas permeability (hot air circulating rotating drum method); or passing the air-laid web through box drying. A method of heat treatment by a hot air passing through an air-laid web (hot air circulation furnace method) or the like.

In the case where the air-laid web is held by the first carrier sheet and the second carrier sheet to form a laminated sheet, the laminated sheet may be directly subjected to hot air treatment. The first carrier sheet and the second carrier sheet can be peeled off by the airlaid web after hot air treatment. The heat treatment temperature may be a temperature at which the heat-melting resin is melted. For example, in the case of using materials such as PP and PE which are generally used in the thermal bonding method, Preferably, the heating temperature is set to 115 ° C or higher.

After the bonding step, the thickness and density of the sheet which produces carbon dioxide are finely adjusted, and the heat treatment may be performed by a heating roller.

(Effect)

In the above production method, the fibers of the particles and the water absorbent material can be efficiently contained in the layer containing the water absorbent material. Therefore, the loss of materials is small and the cost is reduced. Moreover, it is easy to manufacture a sheet of good texture.

In the layer containing the water-absorbing material, the carbonate or acid may be dispersed in the thickness direction of the layer by the presence of the water-absorbing material. The water absorbing material allows the water to slowly permeate, and when the carbon dioxide-generating sheet is used, the reaction between the carbonate and the acid can be started for a time. As a result, the generation of carbon dioxide as a whole of the sheet in which carbon dioxide is generated can be continuously increased.

(Use of sheet that produces carbon dioxide)

The use of the carbon dioxide-generating sheet of the present invention is exemplified below.

Examples of the use of the carbon dioxide-producing sheet include (1) protection, (2) medical use, (3) building materials, civil engineering, (4) sanitary use, (5) wiper, (6) agriculture, and gardening. Use, (7) living materials, (8) industrial materials, (9) experimental materials, etc.

As (1) protection, for example, a protective article can be mentioned. Specific examples of the above protective article include a mask and the like.

Examples of (2) medical use include gauze, a mask, a bed sheet, an antibacterial mat, a loach base fabric, a patch base cloth, and a hyperventilation syndrome therapeutic agent.

(3) Building materials and civil engineering, for example, water-shielding cloth, protective material, and defense Contact materials, etc.

Examples of (4) hygiene include diapers, physiological products, first-aid supplies, cleaning products, wipes, and masks. Specific examples of the diaper include a disposable diaper. Specific examples of the above physiological product include sanitary napkins, cotton slivers, and the like. Specific examples of the above-mentioned first-aid supplies include gauze, enamel plaster, cotton swab, and the like. Specific examples of the cleaning article include, for example, a wet tissue, a cotton pad, a breast milk pad, a wiping sheet, a sweat-absorbent sheet (for face, armpit, neck, foot, etc.), an antibacterial ‧ a sterilizing sheet, and an antiviral sheet Materials, anti-allergic sheets, antibacterial and deodorant sheets, etc. As a specific example of the above-mentioned mask, there is a disposable three-dimensional mask or the like.

Examples of the (5) wiper include a wipe, a wet wipe, an oil filter, a photocopying machine, and the like.

(6) Agricultural and horticultural use, for example, a sheet for nursery, a sheet for covering, an anti-frost sheet, a grass sheet, a garden planter, and the like. In the case of use as agriculture and horticulture, for example, it can be used for the production of an anaerobic environment and for cultivation.

As (7) living materials, for example, packaging materials, cleaning supplies, bags, food, daily groceries, kitchen supplies, sporting goods, beauty materials, and the like can be mentioned. Specific examples of the above-mentioned sweeping article include a wipe, a chemical rag, a brush, and the like. Specific examples of the bag include a desiccant bag or the like. Specific examples of the food product include a tea bag, a coffee bag, a food bag, a freshness retaining material, a sheet for food water absorption, a carbon dioxide injection, a food additive, and the like. Specific examples of the above-mentioned living groceries include a bathing agent, an eye mask, a cold feeling sheet, a warm feeling sheet, a neck scarf, a glove, a deodorant sheet, a fragrance base material, and the like. Specific examples of the kitchen article include a water filter sheet, a fire-resistant cloth, and the like. Specific examples of the above sporting article include fatigue recovery materials and the like. As a beauty material, it is like a mask, a puff, a beauty mask, a beauty glove, and the like.

Examples of the (8) industrial materials include industrial materials, electric materials, batteries, product materials, OA equipment, AV equipment, rolls, machine components, and the like.

Examples of the (9) experimental material include an anaerobic environment forming material, an anesthetic agent, and an insect attractant.

The carbon dioxide-generating sheet of the present invention can be suitably used for applications such as medical sheets and sheets for living materials, gauze, medical sheets for medical use, sheets for cleaning, wipers, and the like. Further, the sheet is not limited to the above classification, and the same sheet of carbon dioxide can be used in various fields and applications.

[Examples]

Hereinafter, the present invention will be more specifically illustrated by the examples, but the present invention is not limited to the following examples.

[Example 1] <Manufacture of sheet of carbon dioxide generation>

A short-cut fiber (denier 3.3 dtex, fiber length 5 mm) and a short-cut core-sheath type heat-melting composite fiber (PET/PE composite core sheath fiber, sheath melting point 130 ° C), respectively, using maneuver The flow jet degassing device performs defibration treatment to obtain individual defibrated chopped fibers.

Next, the ruthenium fibers in the form of defibrated chopped fibers and the heat-fusible composite fibers in the form of defibrated chopped fibers are uniformly mixed by air flow according to a ratio of 70/30 (mass ratio) to obtain 嫘萦/ (PET/PE) fiber mixture.

The citric acid and the polyethylene (PE) powder were mixed in a ratio of 80/20 (mass ratio) to obtain a particle mixture of citric acid/PE powder. Similarly, sodium hydrogencarbonate and PE powder are mixed in a ratio of 80/20 (mass ratio) to obtain a particle mixture of sodium hydrogencarbonate/PE powder. Compound.

Next, after the carrier sheet was mixed with the particle mixture of the citric acid/PE powder, the web forming apparatus 1 shown in Fig. 3 was used to obtain a sheet in which the airlaid web was formed from the fiber mixture.

Specifically, it is attached to and operated on the gas permeable endless belt 20 of the conveyor 10, and is conveyed by the first carrier sheet supply means 40 by a water-repellent needle non-woven fabric (base weight 28 g/m ² , air permeability 292 cm). The first carrier sheet 41 composed of ³ /cm ² /s).

The gas permeable endless belt 20 is sucked by the suction box 60, and a particle mixture of citric acid/PE powder is dispersed on the first carrier sheet 41 so as to be 50 g/m ² , and a fiber mixture supply means is provided thereon. 30 causes the air stream to fall down with the fiber mixture as described above. At this time, the fiber mixture was supplied so that the basis weight of the chopped fibers corresponding to the air-laid web portion was 30 g/m ² .

Next, a particle mixture of sodium hydrogencarbonate/PE powder was dispersed and deposited on the air-laid web at a rate of 50 g/m ² . A second carrier sheet 51 composed of a water-repellent needle non-woven fabric (base weight: 28 g/m ² , air permeability: 292 cm ³ /cm ² /s) was laminated thereon to obtain a laminated sheet containing an air-laid web.

The obtained laminated sheet was subjected to hot air treatment at 140 ° C by a hot air circulating conveyor type box dryer to obtain a carbon dioxide-producing sheet having a basis weight of 186 g/m ² .

[Embodiment 2] <Manufacture of sheet of carbon dioxide generation>

The citric acid and PE powder were mixed with carboxymethylcellulose in a ratio of 60/20/20 (mass ratio) to obtain a particle mixture of citric acid/PE powder/carboxymethylcellulose. Similarly, sodium hydrogencarbonate and PE powder and carboxymethylcellulose were mixed at a ratio of 60/20/20 (mass ratio) to obtain a particle mixture of sodium hydrogencarbonate/PE powder/carboxymethylcellulose to become 66.7. The same procedure as in Example 1 was carried out except that each layer was dispersed in a manner of g/m ² to obtain a carbon dioxide-producing sheet having a basis weight of 219.4 g/m ² .

[Example 3] <Manufacture of sheet of carbon dioxide generation>

A short-cut fiber (denier 3.3 dtex, fiber length 5 mm) and a short-cut core-sheath type heat-melting composite fiber (PET/PE composite core sheath fiber, sheath melting point 130 ° C), respectively, using maneuver The flow jet degassing device performs defibration treatment to obtain individual defibrated chopped fibers.

Next, the ruthenium fibers in the form of defibrated chopped fibers and the heat-fusible composite fibers in the form of defibrated chopped fibers are uniformly mixed by air flow according to a ratio of 50/50 (mass ratio) to obtain 嫘萦/ (PET/PE) fiber mixture.

The sodium hydrogencarbonate and the PE powder were mixed at a ratio of 80/20 (mass ratio) to obtain a particle mixture of sodium hydrogencarbonate/PE powder.

Next, using the web forming apparatus 1 shown in Fig. 3 on the carrier sheet, a sheet in which an airlaid web was formed using the fiber mixture and citric acid was obtained.

Specifically, it is attached to and operated on the gas permeable endless belt 20 of the conveyor 10, and is conveyed by the first carrier sheet supply means 40 by a water-repellent needle non-woven fabric (base weight 28 g/m ² , air permeability 292 cm). The first carrier sheet 41 composed of ³ /cm ² /s).

The gas permeable endless belt 20 is sucked by the suction box 60, and the air flow and the fiber mixture and the citric acid are 50/50 ratio (mass ratio) by the fiber mixture supply means 30 on the first carrier sheet 41. ) Mix and pile up on one side. At this time, the fiber mixture and citric acid were supplied so that the basis weight of the air-laid web portion became 100 g/m ² .

Next, a second carrier sheet composed of a water-repellent needle non-woven fabric (base weight: 28 g/m ² , air permeability: 292 cm ³ /cm ² /s) was laminated on the air-laid web to be 50 g/m ² thereon. In this way, a mixture of particles of sodium bicarbonate/PE powder is dispersed and accumulated. A third carrier sheet composed of a water-repellent needle non-woven fabric (base weight: 28 g/m ² , air permeability: 292 cm ³ /cm ² /s) was laminated thereon to obtain a laminated sheet containing an air-laid web.

The obtained laminated sheet was passed through a box dryer of a hot air circulation conveyor type, and subjected to hot air treatment at 140 ° C to obtain a carbon dioxide-producing sheet having a basis weight of 234 g/m ² .

[Example 4] <Manufacture of sheet of carbon dioxide generation>

The production of carbon dioxide having a basis weight of 186 g/m ^{2 was} carried out in the same manner as in Example 1 except that the fibers of the defibrated chopped fibers (denier 3.3 dtex, fiber length: 5 mm) were used instead of the long fiber wood pulp (NBKP). The sheet.

[Example 5] <Manufacture of sheet of carbon dioxide generation>

A short-cut fiber (denier 3.3 dtex, fiber length 5 mm) and a short-cut core-sheath type heat-melting composite fiber (PET/PE composite core sheath fiber, sheath melting point 130 ° C), respectively, using maneuver The flow jet degassing device performs defibration treatment to obtain individual defibrated chopped fibers.

Next, the fiber of the defibrated chopped fiber and the chopped fiber are chopped The heat-melting composite fiber in the form of fiber is uniformly mixed by a flow of air at a ratio of 50/50 (mass ratio) to obtain a fiber mixture of 嫘萦/(PET/PE).

The citric acid and the PE powder were mixed at a ratio of 80/20 (mass ratio) to obtain a particle mixture of citric acid/PE powder.

Next, using the web forming apparatus 1 shown in Fig. 3 on the carrier sheet, a sheet in which an airlaid web was formed using the fiber mixture and sodium hydrogencarbonate was obtained.

Specifically, it is attached to and operated on the gas permeable endless belt 20 of the conveyor 10, and is conveyed by the first carrier sheet supply means 40 by a water-repellent needle non-woven fabric (base weight 28 g/m ² , air permeability 292 cm). The first carrier sheet 41 composed of ³ /cm ² /s).

The gas permeable endless belt 20 is sucked by the suction box 60, and the air flow and the fiber mixture and the sodium bicarbonate are made into a ratio of 50/50 by the fiber mixture supply means 30 on the first carrier sheet 41 (mass It is mixed, and it falls and piles up. At this time, the fiber mixture and sodium bicarbonate were supplied so that the basis weight of the air-laid web portion became 100 g/m ² .

Next, a second carrier sheet composed of a water-repellent needle non-woven fabric (base weight: 28 g/m ² , air permeability: 292 cm ³ /cm ² /s) was laminated on the air-laid web to be 50 g/m ² thereon. In this way, a mixture of particles of citric acid/PE powder is dispersed and accumulated. A third carrier sheet composed of a water-repellent needle non-woven fabric (base weight: 28 g/m ² , air permeability: 292 cm ³ /cm ² /s) was laminated thereon to obtain a laminated sheet containing an air-laid web.

The obtained laminated sheet was passed through a box dryer of a hot air circulation conveyor type, and subjected to hot air treatment at 140 ° C to obtain a carbon dioxide-producing sheet having a basis weight of 234 g/m ² .

[Embodiment 6]

In addition to replacing the third carrier sheet, a thin paper (tissue, basis weight: 14 g/m ² ) was laminated thereon, and 5 g of an EVA-based hot melt resin was applied thereon, and a PE film (base weight: 40 g/m ² ) was attached thereto. The same procedure as in Example 5 was carried out to obtain a carbon dioxide-producing sheet having a basis weight of 265 g/m ² .

[Embodiment 7] <Manufacture of sheet of carbon dioxide generation>

The chopped strand fibers (denier 3.3 dtex, fiber length 5 mm) were defibrated using a cyclotron jet jet defibrating device to obtain defibrated chopped fibers.

Next, the defibrated chopped fiber, the core-sheath type heat-melt composite fiber having a core portion of polyethylene terephthalate (PET) and a sheath portion of polyethylene terephthalate (PET) ( PET/PET composite core sheath fiber), uniformly mixed by air flow according to a ratio of 70/30 (mass ratio) to obtain a fiber mixture.

Using the web forming apparatus 1 shown in Fig. 3, a sheet in which an airlaid web was formed from a fiber mixture was obtained.

Specifically, it is attached to and operated on the gas permeable endless belt 20 of the conveyor 10, and is fed by a first carrier sheet feeding means 40 by a nylon spunbonded nonwoven fabric (30 g/m ² , air permeability of 295 cm ³ /cm). ² / s) The first carrier sheet 41 formed.

The gas permeable endless belt 20 is sucked by the suction box 60, and on the first carrier sheet 41, the air flow and the fiber mixture and the citric acid particles are dropped by the fiber mixture supply means 30 to form an airlaid web. At this time, by the equivalent of the base web portion of the weight of the airlaid mixture became 30g / m ² mode fiber mixture feed, depending became 50g / m ² and particles of citric acid formulations.

Next, sodium hydrogencarbonate particles were dispersed and deposited on the air-laid web at a rate of 50 g/m ² . A second carrier sheet 51 composed of a nylon spunbonded nonwoven fabric (30 g/m ² and a gas permeability of 295 cm ³ /cm ² /s) was laminated thereon to obtain a laminated sheet containing an airlaid web.

The obtained laminated sheet was passed through a box dryer of a hot air circulation conveyor type, and subjected to hot air treatment at 140 ° C to obtain a carbon dioxide-producing sheet having a basis weight of 190 g/m ² .

[Embodiment 8]

In addition to changing the chopped strand fibers to conifer chemical wood pulp, the air-laid netting machine is used to combine the conifer chemical wood pulp with the core-sheath type heat-melting composite fiber (PET/PET composite core sheath fiber). A carbon dioxide-producing sheet was obtained in the same manner as in Example 7 except that the ratio of 70/30 (mass ratio) was uniformly mixed in the air to form an air-laid web. The resulting carbon dioxide-producing sheet had a basis weight of 190 g/m ² .

[Embodiment 9]

In addition to replacing the second carrier sheet, a thin paper (tissue, basis weight: 14 g/m ² ) was laminated thereon, and 5 g of the EVA-based hot-melt resin was applied thereon, and the PE film (base weight: 40 g/m ² ) was bonded thereto. The carbon dioxide-producing sheet having a basis weight of 219 g/m ² was obtained in the same manner as in Example 8.

[Embodiment 10]

A carbon dioxide-producing sheet having a basis weight of 200 g/m ² was obtained in the same manner as in Example 8 except that the second carrier sheet was used instead of the laminated cotton/PET water needle nonwoven fabric (basis weight: 40 g/m ² ).

[Example 11] <Manufacture of sheet of carbon dioxide generation>

Core-sheath type hot-melt composite fiber (PET/PE composite core sheath fiber) with wood pulp (NBKP), core portion of polyethylene terephthalate (PET) and sheath portion of polyethylene (PE) According to the ratio of 60/40 (mass ratio), the air mixture is uniformly mixed to obtain a fiber mixture.

The citric acid and the PE powder were mixed at a ratio of 75/25 (mass ratio) to obtain a particle mixture of citric acid/PE powder.

Next, using the web forming apparatus 1 shown in Fig. 3, a sheet in which an airlaid web was formed from a fiber mixture was obtained.

Specifically, it is attached to and operated on the gas permeable endless belt 20 of the conveyor 10, and is conveyed by the first carrier sheet supply means 40 by a water-repellent needle non-woven fabric (base weight 28 g/m ² , air permeability 292 cm). The first carrier sheet 41 composed of ³ /cm ² /s).

The gas permeable endless belt 20 is sucked by the suction box 60, and the air flow and the fiber mixture and the sodium hydrogencarbonate are deposited by the fiber mixture supply means 30 on the first carrier sheet 41 to form an airlaid web. At this time, by the equivalent of the base web portion of the weight of the airlaid mixture became 100g / m ² mode fiber mixture feed, depending became 50g / m ² and sodium bicarbonate formulation.

Next, a particle mixture of citric acid particles and PE powder was dispersed and accumulated on the air-laid web so as to be 100 g/m ² . The second carrier sheet 51 composed of a thin paper (base weight: 14 g/m ² ) was laminated thereon, and subjected to hot air treatment at 140 ° C, and then the obtained laminated sheet was passed through a hot-air circulation furnace type box dryer. After pressurizing with a heated press roll, 5 g of an EVA-based hot melt resin was applied thereon, and a PE film (basis weight: 26 g/m ² ) was attached to obtain a carbon dioxide-producing sheet having a basis weight of 323 g/m ² . material.

[Embodiment 12]

A base weight of 373 g/m ² was obtained in the same manner as in Example 11 except that sodium hydrogencarbonate was added in an amount of 100 g/m ² and a particle mixture of citric acid particles and PE powder was dispersed and accumulated so as to be 50 g/m ² . A sheet of carbon dioxide produced.

[Example 13]

A carbon dioxide-producing sheet having a basis weight of 335 g/m ² was obtained in the same manner as in Example 11 except that the water-repellent needle nonwoven fabric was used instead of the water-repellent needle nonwoven fabric (Kinocloth, basis weight: 40 g/m ² ).

[Embodiment 14]

The same procedure as in Example 11 was carried out except that the ratio of the ratio of 75/25 (mass ratio) was changed to a ratio of 25/75 (mass ratio) of citric acid and PE powder to obtain a particle mixture of citric acid/PE powder. A carbon dioxide-producing sheet weighing 323 g/m ² .

[Example 15] <Manufacture of sheet of carbon dioxide generation>

The citric acid and the PE powder were mixed at a ratio of 50/50 (mass ratio) to obtain a particle mixture of citric acid/PE powder.

The sodium hydrogencarbonate and the PE powder were mixed at a ratio of 50/50 (mass ratio) to obtain a particle mixture of sodium hydrogencarbonate/PE powder.

After the carrier sheet is dispersed with a mixture of citric acid/PE powder particles, After laminating the carrier sheet and dispersing the particle mixture of sodium hydrogencarbonate/PE powder, the carrier sheet was further laminated to obtain a carbon dioxide-producing sheet.

Specifically, on the gas permeable endless belt 20 which is mounted and operated on the conveyor 10, the first carrier sheet supply means 40 delivers a water-repellent needle non-woven fabric (28 g/m ² , air permeability 292 cm ³ / The first carrier sheet 41 composed of cm ² /s).

The gas permeable endless belt 20 is sucked by the suction box 60, and a particle mixture of citric acid/PE powder is dispersed on the first carrier sheet 41 so as to be 80 g/m ² , and the second carrier sheet is laminated. The water-repellent needle is not woven (28 g/m ² , air permeability 292 cm ³ /cm ² /s).

Next, a particle mixture of sodium hydrogencarbonate/PE powder was dispersed and deposited on the second carrier sheet so as to be 80 g/m ² . A third carrier sheet 51 composed of a water-repellent needle non-woven fabric (28 g/m ² , air permeability: 292 cm ³ /cm ² /s) was laminated thereon to obtain a laminate.

The obtained laminated sheet was subjected to hot air treatment at 140 ° C by a hot air circulating conveyor type box dryer to obtain a carbon dioxide-producing sheet having a basis weight of 244 g/m ² .

[Comparative Example 1] <Manufacture of sheet of carbon dioxide generation>

After dispersing citric acid on the carrier sheet, the carrier sheet was laminated and sodium hydrogencarbonate was dispersed, and then the carrier sheet was further laminated to obtain a carbon dioxide-producing sheet.

Specifically, on the gas permeable endless belt 20 which is mounted and operated on the conveyor 10, the first carrier sheet supply means 40 is used to feed the PET spunbonded nonwoven fabric (28 g/m ² , air permeability 292 cm ³ /cm). ² / s) The first carrier sheet 41 formed.

The gas permeable endless belt 20 is sucked by the suction box 60, and citric acid is dispersed on the first carrier sheet 41 so as to be 40 g/m ² , and the second carrier sheet is laminated with a water-repellent needle non-woven fabric (28 g). /m ² , air permeability 292cm ³ /cm ² /s).

Next, sodium hydrogencarbonate was dispersed and deposited on the second carrier sheet so as to be 40 g/m ² . A third carrier sheet 51 composed of a PET spunbonded nonwoven fabric (28 g/m ² , air permeability: 292 cm ³ /cm ² /s) was laminated thereon to obtain a laminate.

Next, a sample having a width of 100 mm and a length of 200 mm was cut out from the laminate, and the four corners were heat-sealed at 170 °C. Thereby, a carbon dioxide-producing sheet having a basis weight of 164 g/m ² was obtained.

[Comparative Example 2]

A carbon dioxide-producing sheet was obtained in the same manner as in Example 7 except that the chopped fibers were not prepared. The resulting carbon dioxide-producing sheet had a basis weight of 160 g/m ² .

The following measurements and evaluations were carried out on the carbon dioxide-producing sheets obtained in the examples and the comparative examples.

(Measurement of gas generation time of sheet of carbon dioxide)

The carbon dioxide-producing sheet obtained in Examples 1 to 6 and Comparative Example 1 was cut into a width of 100 mm and a length of 200 mm to prepare a test piece. The test piece was placed in a 500 ml flask, and 500 ml of distilled water was added thereto. After the rubber stopper attached to the hose was placed as a cap and the front end of the hose was placed in the water tank, the occurrence time of the bubble from the front end of the hose was measured.

Further, the carbon dioxide-producing sheets obtained in Examples 7 to 15 and Comparative Example 2 were cut into a width of 50 mm and a length of 50 mm to prepare test pieces. The test piece was placed in a flask, and 10 ml of distilled water was added to connect the rubber plug of the hose to the cover and the soft After the front end of the tube was placed in the water tank, the time at which the bubble occurred at the front end of the hose was measured.

(Evaluation of the uniformity of sheets producing carbon dioxide)

The carbon dioxide-producing sheet obtained in Examples 1 to 6 and Comparative Example 1 was cut into a width of 100 mm and a length of 200 mm to prepare a test piece. Water was placed in the tank, the test piece was immersed, and the occurrence of the bubble was visually confirmed, and the evaluation was performed as follows.

◎: Bubbles occur uniformly and uniformly

○: Bubbles occur almost uniformly and uniformly

△: There is a place where some bubbles are difficult to occur.

×: It is possible to clearly identify where the bubble occurs and where the bubble does not occur.

(Evaluation of falling powder of carbon dioxide-producing sheet)

The carbon dioxide-producing sheet obtained in Examples 1 to 6 and Comparative Example 1 was cut into a width of 100 mm and a length of 200 mm to prepare a test piece. The test piece was lightly rubbed on the test bench to visually evaluate the falling powder dropped onto the test bench.

◎: almost no powder

○: less powder

△: slightly falling powder

×: Falling powder

(Texture evaluation of sheets producing carbon dioxide)

The carbon dioxide-producing sheet obtained in Examples 1 to 6 and Comparative Example 1 was cut into a width of 100 mm and a length of 200 mm to prepare a test piece. The texture was evaluated by abutting the back of the hand in a dry state and confirming the touch of the skin.

◎: soft and very good texture

○: slightly soft and good texture

△: slightly rough

×: Rough and poor texture

(Evaluation results)

Tables 1 and 2 show the results of the measurement and evaluation tests.

Examples 1 to 6 and 15 are sheets for producing carbon dioxide according to a first aspect of the present invention, and Examples 7 to 14 are sheets for producing carbon dioxide according to a second aspect of the present invention. material. The carbon dioxide-producing sheet of the present invention has a long duration of carbon dioxide generation. Further, the carbon dioxide-producing sheet according to the first aspect of the present invention is such that the sheet is uniformly or almost uniformly bubbled. Further, the sheet for generating carbon dioxide according to the first aspect of the present invention has less powder. Further, in the case where the carbon dioxide-generating sheet according to the first aspect of the present invention contains a water-absorbent material in the carbonate layer and/or the acid layer, the touch of the skin is soft and the texture is good.

13‧‧‧carbonate particles

16‧‧‧Hot-melting resin

23‧‧‧ Acid particles

100‧‧‧carbonate layer containing water-absorbing material

130‧‧•carbonate layer

200‧‧‧Acid layer containing water-absorbing material

230‧‧‧ acid layer

300‧‧‧Water-permeable or absorbent sheet

400‧‧‧film

Claims (8)

A sheet for producing carbon dioxide, comprising a laminate of a carbonate layer and an acid layer, wherein a water-permeable or water-absorbent sheet, the carbonate layer and the acid layer are provided between the carbonate layer and the acid layer A mixture of carbonate particles or acid particles and a heat-fusible resin is disposed on the surface of the water-permeable or water-absorbent sheet, and the heat-fusible resin is melted by heat. The carbon dioxide-producing sheet according to claim 1, wherein the heat-fusible resin comprises a resin selected from the group consisting of a particulate hot-melt resin, a fibrous heat-meltable resin, and a mixture thereof. . A sheet for producing carbon dioxide according to claim 1 or 2, wherein at least one of the carbonate layer and the acid layer contains a water absorbent material. A sheet for producing carbon dioxide, comprising a laminate of a carbonate layer and an acid layer, wherein the carbonate layer and the acid layer are adjacent to each other, and at least one of the carbonate layer and the acid layer is fibrous. Or a layer of particulate absorbent material. The carbon dioxide-producing sheet according to claim 4, wherein both of the carbonate layer and the acid layer contain the water-absorbing material. A sheet for generating carbon dioxide according to claim 4, wherein a surface of at least one of the outer layers of the laminate is provided with a water permeable or water absorbing sheet. A sheet for producing carbon dioxide according to claim 6, wherein the water permeable or water absorbing sheet contains a water absorbing material. A sheet for producing carbon dioxide according to any one of claims 4 to 7, which is produced by a dry method.