JP7035752B2 - Functional seats and functional seat kits - Google Patents

Description

The present invention relates to a functional sheet that exerts its function upon contact with water, and more particularly to a water suction type functional sheet and a functional sheet kit including the same. The functional sheet of the present invention includes agricultural materials, experimental materials such as insect attractants, anaerobic environment-forming materials, anesthetics, fatigue recovery materials, aromatic base materials, insect repellents, antibacterial / antiviral sheets, etc. It can be preferably used in the fields of cosmetics, pharmaceutical components, pharmaceuticals, cleaning products, miscellaneous goods and the like.

As one example of the functional sheet, there is a carbon dioxide gas generating sheet that generates carbon dioxide gas by the reaction of carbonate and acid. For example, Patent Document 1 has five layers obtained by laminating a water-permeable breathable nonwoven fabric, sodium hydrogencarbonate, a coarse nonwoven fabric, citric acid or sodium dihydrogen citrate, and a water-permeable breathable nonwoven fabric in this order. The sheet-shaped pack material having a structure is disclosed. In the configuration of Patent Document 1, when the user impregnates the sheet-shaped pack material with water such as cosmetic water, the water is supplied to sodium hydrogen carbonate and citric acid or sodium dihydrogen citrate through a water-permeable breathable non-woven fabric. .. Sodium bicarbonate and citric acid or sodium dihydrogen citrate are both soluble in water. Then, the dissolved solution comes into contact with the coarse non-woven fabric and starts a reaction to generate carbon dioxide gas.

Further, as another example of the functional sheet, there is a sheet containing a functional component such as an antibacterial agent and an insect repellent. For example, Patent Document 2 is a functional sheet obtained by applying a cyclodextrin solution to which an antibacterial agent or an insect repellent is added to the surface of a substrate such as paper or a non-woven fabric by means such as spraying or brushing and drying. Is disclosed. This functional sheet can be used for food wrapping, the inner surface of a storage container, and the like, and when it comes into contact with water, the functional component is released.

Japanese Unexamined Patent Publication No. 2014-655707 Japanese Unexamined Patent Publication No. 2002-29901

Depending on the application of the functional sheet, it may be preferable that the function is exerted intensively in a relatively short time, or it may be preferable that the function is continuously exerted for a long period of time. For example, in Patent Document 1, for the purpose of sustaining the generation time of carbonic acid gas in a sheet-shaped pack material, water-soluble is added to a layer containing sodium hydrogen carbonate and either citric acid or sodium dihydrogen citrate. Sexual carboxymethyl cellulose (CMC) is mixed and blended. However, the effect of extending the carbon dioxide generation time by blending CMC is limited. Therefore, there is a demand to maintain the function by another configuration.

An object of the present invention is to provide a functional sheet having an excellent sustained effect of exerting a function and a functional sheet kit containing the same.

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

1. 1. It contains an absorbent material and a functional component, and when used in a form in which at least a part thereof is in contact with water, the water is sucked up and the functional component exerts its function by a reaction through the water. , A water-sucking-type functional sheet, wherein the functional sheet has an inhibitory region in which the movement of the water at the time of water-sucking is inhibited.

2. 2. The inhibition region is characterized by being a high-density portion having a higher density than the periphery of the inhibition region in the functional sheet. Functional sheet described in.

3. 3. The inhibition region is characterized by being a perforated portion in the functional sheet. Or 2. Functional sheet described in.

4. The inhibition region is characterized by being a notched portion in the functional sheet. From 3. Functional sheet described in any of.

5. 1. It is characterized by having a plurality of the inhibition regions. From 4. Functional sheet described in any of.

6. It contains an absorbent material and a functional component, and when used in a form in which at least a part thereof is in contact with water, the water is sucked up and the functional component exerts its function by a reaction through the water. , A water suction type functional sheet, wherein the functional sheet is configured so that the water movement distance with respect to the water suction height at the time of water suction is long. Functional sheet.

7. The functional sheet is characterized in that it is a spiral type. Functional sheet described in.

8. 1. 1. From 7. A functional sheet kit comprising the functional sheet according to any one of 1 and a container for containing the water for contacting at least a part of the functional sheet.

The functional sheet according to one aspect of the present invention contains an absorbent material and a functional component, and when used in a form in which at least a part thereof is in contact with water, sucks up the water and sucks the water. It is a water-sucking type functional sheet in which the functional component exerts its function by an intervening reaction. The functional sheet is characterized by having an inhibitory region in which the movement of the water during water suction is inhibited. Examples of the inhibition region include a spatial region such as a hole or a notch where moisture cannot be transmitted, and a high-density region such as a portion compressed by embossing or heat sealing to prevent moisture from passing through. Since such a functional sheet has a restricted movement of water in the functional sheet as compared with a configuration having no inhibition region, a width is generated in the functional sheet at the time when the reaction via water is started. , The duration of functional performance of the functional sheet as a whole becomes longer.

The functional sheet kit according to the present invention is a kit including the functional sheet and a container for containing the water for contacting at least a part of the functional sheet. According to the kit provided with such a container, the functional sheet can be installed without the need for other tools.

It is a figure which shows the structural example of the functional sheet which concerns on this invention. It is a figure which shows the use example of the functional sheet and the functional sheet kit which concerns on this invention. It is a figure which shows the structural example of the carbon dioxide gas generation sheet applicable to the functional sheet base material of this invention. It is a figure which shows the structural example of the carbon dioxide gas generation sheet applicable to the functional sheet base material of this invention. It is a figure which shows the structural example of the cyclodextrin-containing sheet applicable to the functional sheet base material of this invention. It is a figure which shows the structural example of the cyclodextrin-containing sheet applicable to the functional sheet base material of this invention. It is a schematic diagram which shows the web forming apparatus which can be used in the manufacture of the functional sheet base material of this invention.

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

[First aspect]
The configuration and operation / effect of the functional sheet and the functional sheet kit according to the present invention will be described with reference to FIGS. 1 and 2.

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

With reference to FIG. 1, the configuration and operation / effect of the functional sheet according to the present invention will be described.

<Functional sheet>
The functional sheet according to the present invention contains an absorbent material and a functional component, and when used in a form in which at least a part thereof is in contact with water, sucks up the water and reacts with the water to perform the function. It is a water-sucking type functional sheet in which the sexual components exert their functions. The functional sheet is characterized by having an inhibitory region in which the movement of the water during water suction is inhibited.

FIG. 1 is a schematic view showing a non-limiting example of the configuration of the functional sheet according to the present invention. 1 (a) to 1 (d) show a top view of a functional sheet. FIG. 1 (d-1) is a side view of the functional sheet shown in FIG. 1 (d). FIG. 1 (d-2) is a side view of a modified example of the functional sheet shown in FIGS. 1 (d) and (d-1), and the functional sheet of this modified example is three-dimensionally molded. ..

FIG. 2 is a side schematic view showing an example of a usage pattern of the functional sheet and the functional sheet kit according to the present invention. The functional sheet kit according to the present invention includes the functional sheet according to the present invention and a container containing water for contacting at least a part of the functional sheet with water. The functional seat kit may further include configurations for suspension and placement in order to maintain the posture of the functional seat when used. According to the kit having such a configuration, the functional sheet can be installed without the need for other tools.

The functional sheet according to the present invention has a configuration in which the functional sheet is provided with an inhibition region in which the movement of water is inhibited. Hereinafter, in the present specification, the functional sheet before the inhibition region is provided is also referred to as a functional sheet base material.

(Functional sheet base material)
The functional sheet base material of the present invention contains a water-absorbent material such as an absorbent fiber and one or more functional components, sucks up water, and exerts its function by a reaction through water. Any sheet that can be used can be used.

As an example of the functional sheet base material applicable to the present invention, carbonate / bicarbonate and acid are contained as functional components, and the carbonate / bicarbonate reacts with the acid via water. An example is a carbon dioxide gas generating sheet that generates carbonic acid gas. Further, as another example of the functional sheet base material, there is a carbonate sheet containing carbonate / bicarbonate as a functional component and reacting with an acid via water to generate carbon dioxide gas. Further, as another example of the functional sheet base material, there is an acid sheet containing an acid as a functional component and reacting with a carbonate / bicarbonate via water to generate carbon dioxide gas. Further, as another example of the functional sheet base material, there is a cyclodextrin-containing sheet containing cyclodextrin in which the functional component is encapsulated and releasing the functional component by a reaction via water. Further, as another example of the functional sheet base material, there is a sheet containing a carbon dioxide-generating functional component and cyclodextrin in which another functional component is encapsulated. Each of the carbon dioxide generating sheet and the cyclodextrin-containing sheet applicable to the functional sheet base material of the present invention will be described later with items.

(Inhibition area)
The functional sheet according to the present invention has a structure in which an inhibition region is provided on the functional sheet base material. The inhibition region in the present invention refers to a region in which the movement of water during water suction is relatively inhibited when compared with the surrounding region.

The inhibition region of one embodiment can be a partial space formed on the functional sheet. The inhibition region can be, for example, a plurality of holes or notches, as illustrated in FIGS. 1 (a), (b) and (d-1), and water cannot be transmitted in such a region.

The inhibitory region of one embodiment can be a denser, denser portion of the functional sheet than the perimeter of the inhibitory region. The inhibition region can be, for example, a portion compressed by embossing, heat sealing, or the like, as illustrated in FIG. 1 (c), and it is difficult for moisture to pass through such a region.

Further, in the example shown in FIG. 1 (d-2), the functional sheet is configured so that the water movement distance with respect to the water suction height at the time of water suction is long, whereby the functional sheet is configured. The movement of water within is restricted.

The functional sheet of the present invention has a width in the functional sheet at the time when the reaction via water is started because the movement of water in the functional sheet is restricted as compared with the configuration having no inhibition region. Will occur, and the duration of functional performance of the functional sheet as a whole will be extended. In order to process into such a shape, a certain degree of rigidity is required, and in order to design the water movement distance to be long depending on the shape, it conforms to the JIS P 8125 paper and paperboard Taber stiffness tester method. The Taber rigidity of the sheet measured in the above is preferably 0.8 mN · m or more, more preferably 1.0 mN · m or more, and further preferably 1.5 mN · m. If it is within the above range, it has sufficient rigidity, so that the above shape can be maintained.

(Functional and functional ingredients)
The functional sheet according to the present invention contains a functional component and exerts its function by a reaction via water. The function of the functional sheet according to the present invention can be arbitrarily set according to the intended use and purpose by selecting the functional component. As the functional component, any component may be used as long as it is a component that exerts its function by a reaction mediated by water.

For example, the functional component may be one that expresses its function by itself when it comes into contact with water. Further, the functional component may be a so-called two-agent (multi-agent) reaction type material in which the functional component comes into contact with another one or more functional components through the mediation of water and develops the function by the reaction generated by the contact. good. That is, the functional sheet according to the present invention may contain one or more functional components.

An example of a substance that exhibits its function by contact with water is, for example, a powder that becomes alkaline when it comes into contact with water. As the powder that becomes alkaline when in contact with water, an alkaline inorganic salt such as carbonate or bicarbonate can be used. As the alkaline inorganic salt, any grade that can be used in cosmetics can be used without any particular limitation, and if it is used for purposes that do not touch the human body and have no problem with the environment, no particular grade is specified. For example, sodium carbonate, sodium hydrogencarbonate, sodium sesquicarbonate, potassium carbonate, potassium hydrogencarbonate, calcium carbonate, magnesium carbonate, magnesium bicarbonate, calcium bicarbonate or a derivative thereof can be used. Two or more carbonates and / or bicarbonates may be used in combination. In particular, one or both of sodium hydrogen carbonate and sodium carbonate can be preferably used. The alkaline inorganic salt is a solid composition, preferably in the form of particles, for example. The alkaline inorganic salt may be in the form of being supported on a carrier such as silica. Further, the alkaline inorganic salt may contain water as water of crystallization. When water of crystallization is contained, the solubility in water is high and the reactivity is improved. However, from the viewpoint of storage stability, the functional sheet containing a powder that becomes alkaline when it comes into contact with water should not contain water that causes deterioration such as hydrolysis or reaction with acid. preferable. As the powder that exhibits alkalinity when in contact with water, metal oxides such as calcium hydroxide and sodium hydroxide, metal hydroxides, phosphates and silicates can also be used. As the powder that exhibits alkalinity when in contact with the water used in the present invention, particles having an average particle diameter of 5 to 5000 μm are preferable. When the average particle diameter is 5 to 5000 μm, the particles are less likely to fall off. When the average particle size is reduced, the dissolution rate becomes faster, and the reaction proceeds immediately after getting wet with water. On the other hand, if the average particle size is increased, the dissolution gradually progresses when it comes into contact with water. Therefore, it has the effect of prolonging the duration of functional exertion. In addition, increasing the average particle diameter has the effect of reducing particle dropout.

Further, as another example of a substance that exhibits its function independently when dissolved in water, for example, a powder that exhibits acidity when in contact with water can be mentioned. As a powder that becomes acidic when it comes in contact with moisture, it can be used without any particular limitation as long as it is a grade acid that can be used in cosmetics. No special grade is specified. 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 is hydrolyzed to produce an acid, and the like can be used. Two or more kinds of acids may be used in combination. The acid is a solid composition, preferably in the form of particles, for example. Hereinafter, in the present specification, a powder that exhibits acidity when in contact with moisture is simply referred to as acid particles. Further, the acid may contain water as water of crystallization. When water of crystallization is contained, the solubility in water is high and the reactivity is improved. However, from the viewpoint of storage stability, it is preferable that the acidic layer does not contain water that causes deterioration such as hydrolysis and reaction with carbonate and / or bicarbonate.

As the acid used in the present invention, particles having an average particle diameter of 5 to 5000 μm are preferable. When the average particle diameter is 5 to 5000 μm, the particles are less likely to fall off. When the average particle size is reduced, the dissolution rate becomes faster, and the reaction proceeds immediately after getting wet with water. On the other hand, if the average particle size is increased, the dissolution gradually progresses when it comes into contact with water. Therefore, it has the effect of prolonging the duration of functional exertion. In addition, increasing the average particle diameter has the effect of reducing particle dropout.

Examples of the two-agent reaction type functional component include, for example, an alkaline substance and an acidic substance. The combination of these through water results in foaming. Examples of the alkaline substance include alkali metal carbonate, alkali metal hydrogen carbonate, alkaline earth metal carbonate, alkaline earth metal hydrogen carbonate and mixtures thereof, and the above-mentioned alkaline substances when in contact with moisture can be mentioned. The powder exhibiting the above can be preferably used. As acidic substances, acetic acid, adipic acid, ascorbic acid, butyric acid, citric acid, formic acid, fumaric acid, glycoic acid, lactic acid, phosphoric acid, malic acid, oxalic acid, succinic acid, tartaric acid and a combination thereof can be used. The above-mentioned powder that becomes acidic when in contact with water can be preferably used. In addition, the functional component is contained in the functional sheet in a form of being at least partially covered with another material, and is released from the coated state (release, elution, etc.) by the reaction between water and the other material. By doing so, it may exhibit a function. Examples of such functional components include functional components in the form encapsulated in cyclodextrin and functional components in the form coated with a water-soluble material. Examples of the coating with a water-soluble material include coating with a water-soluble material and encapsulation (encapsulation) with a capsule formed of the water-soluble material. As a method of coating the functional material with the water-soluble material, for example, microencapsulation by a suspension polymerization method or a dropping method, or adding the functional material to a solution in which the water-soluble material is dissolved is spray-dried. How to do it. In the present specification, a functional component in a form in which at least a part thereof is covered with a water-soluble material may be simply referred to as a functional component.

The water-soluble material used in the present invention preferably contains at least one selected from materials generally classified as saccharides, water-soluble polymers, gelatin, collagen, collagen peptide, starch and the like. By using these materials, the functional component of the present invention can be coated so that at least a part thereof is covered.

The saccharide used in the present invention is not particularly limited. For example, examples of monosaccharides include glucose, fructose, and galactose. Examples of the disaccharide include sucrose, maltose, lactose, cellobiose, trehalose, and palatinose. Examples of the polysaccharide include amylose, cellulose and the like, starch syrup, sanon tou and brown sugar. Examples of sugar alcohols include sorbitol, maltitol, xylitol, and reduced starch syrup. Examples of the oligosaccharide include xylooligosaccharide, fructooligosaccharide, galactooligosaccharide, milk fruit oligosaccharide, soybean oligosaccharide and the like.

Examples of the water-soluble polymer include polyacrylic acid and its salt, methacrylic acid and its salt, polyacrylic acid methacrylic acid copolymer, polyethylene glycol, carboxymethyl cellulose, polyvinyl alcohol, polyvinyl pyrrolidone, carbopol, crystalline cellulose, and cellulose. Examples thereof include arginates such as purulan, casein, pectin, starch and sodium alginate, locust bean gum, carrageenan, agar, arabic gum, xanthan gum, hyaluronic acid and its salts, and glucosamine.

As the gelatin, collagen and collagen peptide, gelatin, collagen or collagen peptide derived from cattle, pigs and fish are used, respectively.

Examples of the starch include potato starch, sweet potato starch, tapioca starch, rice starch, corn starch, wheat starch and barley starch.

Examples of the functional components that can be used in the present invention include effervescent components (alkaline substances, acidic substances), wasabi components, mustard components, pepper components, ginger components, lemon components, orange components, grapefruit components, and yuzu components. Natural antibacterial agents or fragrances such as seaweed ingredients, matcha ingredients, almond ingredients, natural meat flavors, roses, herbs, etc., plant extracts, tea extracts, etc., natural or organic volatilization such as l-menthol ingredients Examples thereof include sex antibacterial agents or fragrances, cosmetic raw materials such as coenzyme Q10 and isoflavone, yeasts that start fermentation when they come into contact with water, and fungi such as powdered lactic acid bacteria.

In addition to the above, functional ingredients include, for example: medicinal ingredients, moisturizers, feel improvers, antioxidants, analgesics, oxidants, preservatives, antibacterial agents, pH adjusters, UV absorbers, whitening agents. Agents, vitamins and their derivatives, anti-inflammatory agents, anti-inflammatory agents, hair growth agents, blood circulation promoters, stimulants, hormones, anti-wrinkle agents, anti-aging agents, tightening agents, cooling agents, warming agents, wounds Healing stimulants, stimulants, analgesics, cell activators, plant / animal / microbial extracts, antipruritic agents, keratin exfoliating / dissolving agents, antibacterial agents, cooling agents, astringents, fragrances, pigments, coloring agents, anti-inflammatory analgesics Agents, antifungal agents, antihistamines, hypnotic analgesics, tranquilizers, antihypertensive agents, antihypertensive diuretics, antibiotics, anesthetics, antibacterial agents, antiepileptic agents, coronary vasodilators, crude drugs, adjuvants, moisturizers , Analgesics, keratin softening and stripping agents, preservatives and bactericidal agents, fat-soluble substances, deodorant components and other known compounds can be arbitrarily selected according to the intended use and purpose.

Further, as a further example of the functional component, a material generally called an effect promoter can be mentioned. The functional sheet of the present invention may contain one or more effect promoters depending on the intended use. Examples of the effect promoter include: oil-based base, surfactant, polymer, thickening / gelling agent, solvent, propellant, inorganic salt, enzyme, nucleic acid, dye, pigment, metal-containing compound, unsaturated single amount. Examples thereof include bodies, polyhydric alcohols, polymer additives, tackifiers, oily raw materials, ultraviolet blocking agents, antioxidants, liquid matrices, polymer carboxylates, additives, metal shavings and the like.

(Water-absorbent material and water-repellent material)
The functional sheet according to one aspect of the present invention contains a water-absorbent material in an amount of 5% by mass or more and a water-repellent material in an amount of 5% by mass or more based on the total mass of the functional sheet. .. When the amount of the water-repellent material is increased to 10% by mass, 20% by mass, 30% by mass, or the like, the effect of extending the duration of function exertion is exhibited. The length of the duration can be controlled by selecting an appropriate amount as the amount of the water-repellent material to be blended.

In this embodiment, the length of the function exertion can be controlled by appropriately setting the type and blending ratio based on the physical properties of the water-absorbent material and the water-repellent material.

(Water-absorbent material)
The water-absorbent material is a material having a property of absorbing and retaining water. Therefore, it is possible to promote the infiltration and penetration of water in contact with a part of the functional sheet into the inside of the functional sheet.

As the water-absorbent material, natural fibers such as pulp, linen, cotton, silk, wool and mineral fibers, regenerated fibers such as rayon, 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 kinds of water-absorbent 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 also be used. Examples of the water-absorbent resin particles include carboxymethyl cellulose, polyvinyl alcohol, a polymer absorber (SAP), and the like.

(Water repellent material)
The water-repellent material is a material having a property of repelling water. Therefore, in general, it does not contribute to the infiltration and penetration of water in contact with a part of the functional sheet into the inside of the functional sheet. According to the configuration of this embodiment, the amount and speed of water sucked up by the functional sheet when used in a form in which at least a part thereof is in contact with water is limited by the presence of the water-repellent material, and is contained in the functional sheet. The start time of the water-mediated reaction in the water can be varied. As a result, the duration of functional exertion becomes longer when viewed as a functional sheet as a whole.

Examples of materials that can be used as the water repellent material of the present invention include water repellent fibers and water repellent pulp.

(Water repellent fiber)
As the water-repellent fiber used in the present invention, a material in which a chemical having a water-repellent function is added to the surface of the synthetic fiber or a material in which a water-repellent agent is kneaded into the synthetic fiber can be used. Further, it may be a fiber derived from various organic substances, or may be a fiber obtained by imparting water repellency to a fiber derived from an organic substance having water absorption.

As a method of imparting a water-repellent function to the surface of a synthetic fiber, a method of adding a water-repellent agent to an oil agent applied in a step of manufacturing the fiber is known.

As a method of kneading a water repellent agent into a synthetic fiber, a method of kneading a powdery water repellent agent into a resin serving as a masterbatch which is a material of the fiber is known.

The water repellent agent added to the oil agent is not limited as long as it is known. For example, a fluoropolymer, a silicone compound, a vinyl ester, an α, β-unsaturated carboxylic acid, an α, β-unsaturated carboxylic acid anhydride, a polyolefin resin such as an α, β-unsaturated carboxylic acid alkyl ester, a paraffin wax, and the like. Ionic monomers, hydrophobic monomers, hydrophilic monomers, and branched structures are added to polymers and acrylic polymers obtained by polymerizing wax-based water repellents such as microcrystallin wax, polyethylene wax and maleized petroleum resin, and monomers such as acrylamide and metaacrylamide. Known are polyacrylamide-based polymers obtained by copolymerizing a monomer that can be imparted, a polyfunctional monomer that can be imparted with a crosslinked structure, a styrene acrylic resin, and the like.

As a fiber derived from an organic substance having water repellency, a fiber such as cotton or wool that has not been subjected to degreasing treatment is known.

(Water repellent pulp)
As the material imparted with water repellency by the hydrophilic fiber derived from an organic substance, the water repellent pulp described below can be used. It is possible to impart water repellency not only to pulp but also to other hydrophilic fibers such as rayon and kenaf.

The water-repellent pulp used in the present invention is in a state where the pulp fiber and the water-repellent agent are firmly bonded directly or indirectly, and the pulp fiber and the water-repellent agent are difficult to separate when a mechanical share is added. Further, it is characterized in that the pulp fiber and the water repellent do not separate when in contact with water, and specifically, the following (1) is satisfied:
(1) In the water absorption test specified in JIS L1907: 2010 standard, the settling start time is 30 seconds or more.
More specifically, the measurement is performed according to the water absorption test (sedimentation method) specified in JIS L1907: 2010 standard. After floating the sample in a water tank containing water at 20 ° C. ± 2 ° C., the time until the sample becomes wet and begins to settle in water (settlement start time) is measured.
In the present invention, the water-repellent pulp has a settling start time of 30 seconds or more, preferably 60 seconds or more.
The water absorption rate can be controlled by containing the water-repellent pulp.

Further, the water-repellent pulp preferably satisfies at least one of the following (2) to (5):
(2) The amount of pulp water retention in the water retention test is 15 g or less.
(3) The amount of liquid flow in the liquid flow test is 35 g or more.
(4) Under microscopic observation, the swelling rate when water is dropped is 20% or less.
(5) The amount of water absorbed in the tea bag test is 10 (g / g) or less.
Hereinafter, the above (2) to (5) will be described in detail.

(2) The amount of water retained in the pulp in the water retention test is 15 g or less. This test measures how much water the pulp can retain out of 40 cc (40 g) of water, and the amount of water retained in the pulp is. The higher the amount, the higher the water absorption. Specifically, it is measured by the following method.
An acrylic bottom with an inner diameter that fits snugly is installed in an acrylic frame (hollow square column) with a length and width of 10 cm and a height of 6 cm. The degree of adhesion is such that when water is poured into the frame with the bottom surface, the water slightly seeps out.
Separately, weigh the filter paper (filter paper sufficient to absorb 40 cc of water) is laid under the frame with the bottom surface. 2 g of pulp fiber is uniformly put in this frame, 40 cc of water is added to the whole, and after 1 minute, 700 gf of an acrylic weight having almost the same size as the inner diameter of the frame is placed and a load is gently applied to the pulp fiber. After 1 minute, the mass of the filter paper under the frame is measured, the amount of water exuding from the frame is measured, and the difference from the added water of 40 g is defined as the pulp water retention amount (g). That is, the pulp water retention amount is represented by the following formula (a).
Pulp water retention (g) = 40 (g) -Amount of exuded water (g) Formula (a)
The amount of exuded water is measured from the difference between the mass of the filter paper measured before the test and the mass of the absorbed filter paper after the test.
The water retention amount of the water-repellent pulp is preferably 12.5 g or less, more preferably 10 g or less, still more preferably 7.5 g or less, still more preferably 5 g or less.

(3) An acrylic cylinder with an inner diameter of 3 cm and five drainage ports with a hole diameter of 3 mm on the bottom surface is placed on a wire net having a liquid flow amount of 35 g or more in the liquid flow test, and 1 g of pulp fiber is placed in height. After compressing to 4 cm (density 0.035 g / cm ³ ), 50 cc of water is added at one time, and the amount of discharged water is weighed to obtain the liquid flow amount.
The larger the amount of liquid flow, the lower the water absorption and the better the water repellency.
The liquid flow amount of the water-repellent pulp is preferably 37.5 g or more, more preferably 40 g or more, still more preferably 42.5 g or more, still more preferably 45 g or more.

(4) The swelling rate when water is dropped under a microscope is 20% or less. Under a microscope, the swelling rate when water is dropped on water-repellent pulp is 20% or less. The swelling rate is preferably 15% or less, more preferably 10% or less, still more preferably 5% or less, still more preferably 3% or less, still more preferably 0% or less.
The swelling rate is measured by the following method. Specifically, 3 to 5 mg of pulp fiber is placed on the preparation, and about 0.1 ml of water is dripped with a dropper. After leaving it for about 5 minutes, tilt the slide and remove the water that has not been absorbed by the pulp fibers with a Kimwipe or the like. The fiber diameter of the pulp fiber is measured from the micrographs before and after dropping water, and the swelling rate is calculated by the following formula.
Swelling rate = {fiber diameter of pulp fiber after water dripping (width dimension) -fiber diameter of pulp fiber before dripping water (width dimension)} ÷ fiber diameter of pulp fiber before dripping water (width dimension) x 100 (%) )
Here, the state where the swelling rate is 0% means that the water and the pulp fibers do not blend with each other, the water remains spherical due to surface tension, and the fibers are placed on the water droplets, or the fibers have spherical water droplets. It means the state of attachment.

(5) The water absorption amount in the tea bag test is 10 (g / g) or less. When the water-repellent pulp is subjected to the tea bag test, the water absorption amount is preferably 10 (g / g) or less, more preferably 7. It is .5 (g / g) or less, more preferably 5 (g / g) or less, still more preferably 3 (g / g) or less.
The water absorption amount is measured by the following tea bag test. Specifically, put the pulp fiber in a tea bag (9.5 cm x 7 cm, non-woven fabric using polyester as the main fiber material, Tokiwa's tea bag M, manufactured by Tokiwa Kogyo Co., Ltd.), and attach a string to the tip of the tea bag. Attach a weight (500g). Place the tea bag with the weight in a beaker filled with water. Fill the tea bag to a height where the entire tea bag is completely submerged. After soaking the tea bag for 5 minutes, remove it from the water and hang it in the air for 5 minutes to drain the water. The mass of the tea bag (containing pulp fiber) after draining is measured, and the amount of water absorption is calculated by the following formula. Here, since the amount of water absorbed by the tea bag itself is very small, it does not need to be considered.
Water absorption (g / g) = (mass of tea bag containing pulp fiber after draining-mass of tea bag containing pulp fiber before immersion in water) ÷ mass of pulp fiber before test Here, the amount of water absorption is 1 times. The state means that the water and the pulp fiber do not blend with each other, the water remains spherical due to the surface tension, and the fiber is placed on the water droplet, or the spherical water droplet is attached to the fiber.

In the present invention, it is preferable that the water-repellent pulp satisfies the above (1) and further satisfies at least one of (2) to (5).
The water-repellent pulp preferably satisfies at least (1), more preferably at least (1) and (2), and even more preferably at least (1), (2) and (3). It is even more preferable to satisfy all of 1) to (5).

The water-repellent pulp contains pulp fibers and may be directly or indirectly treated with a water-repellent agent, or may have water repellency by selecting a raw material for the pulp fibers. .. The pulp fiber is a fiber having an irregularly bent shape and a crimp-like morphology, and also a fiber having a hollow tubular morphology having pores (lumens) occupied by the protoplasm of plant cells. be. The use of water-repellent pulp is preferable from the viewpoint that excellent sound absorption can be obtained and the environmental load can be further reduced.
Pulp fibers include wood pulp (coniferous tree pulp, broadleaf tree pulp), rug pulp, linter pulp, linen pulp, non-wood pulp such as 楮, sansho, and ganpi pulp, and pulp such as used paper pulp; these pulps are used as raw material pulps. Fluff pulp obtained by mechanically defibrating raw pulp into fibers;
As the raw material pulp, fine fiber pulp is preferable from the viewpoint of sound absorption, but if the density is high, the sound absorption may be inferior. Further, from the viewpoint that a non-woven fabric having excellent water repellency can be easily obtained, it is also preferable to use wood having a high alkane content such as eucalyptus or wood having a high paraffin content as the raw material pulp.

In the present invention, the water-repellent pulp may be the above-mentioned fiber pulp treated with a water-repellent agent. The water repellent is not particularly limited, for example, various waxes; higher fatty acid derivatives; synthetic resins such as polyolefin resins, polyamide resins, and polyamine resins; fluororesins such as polytetrafluoroethylene and polychlorotrifluoroethylene; Examples thereof include silicone resins such as polymethyl hydrogen siloxane and polydimethyl siloxane, chromates; zirconium salts; and the like. Further, rosin sizing agents, synthetic sizing agents, petroleum resin sizing agents, styrene sizing agents, neutral rosin sizing agents, alkenyl succinic anhydride, alkyl ketene dimers and the like can also be used as water repellents in the present invention. be.
Specific examples of the water repellent include vegetable waxes such as carnauba wax, cotton wax, wood wax and rice wax, animal waxes such as beeswax and lanolin, and waxes extracted from montan wax, ozokelite, selecin and oil shell. Mineral waxes such as, and petroleum waxes such as paraffin, microcrystallin, and petrolatum can be mentioned. In addition to these natural waxes, synthetic hydrocarbon waxes such as Fisher Tropsch wax and polyethylene wax, higher fatty acid amides such as 12-hydroxystearate amides, stearate amides, phthalic anhydride imides, and chlorinated hydrocarbons, and esters. , Ketone, ether and other synthetic waxes can also be used. Further, a crystalline polymer having a long alkyl group in the side chain can be mentioned.

The content of the water-repellent pulp is appropriately changed depending on the required duration of the functional sheet, but in order to extend the extension time, it may be 5% by mass or more based on the total mass of the functional sheet. It is preferably 10% by mass or more, more preferably 25% by mass or more, and particularly preferably 35% by mass or more. The content of the water-repellent pulp is preferably 95% by mass or less. By setting the content of the water-repellent pulp within the above range, the water repellency of the fiber-reinforced plastic molded body sheet can be effectively enhanced. In addition, the strength of the molded product can be increased.

The mass average fiber length of the water-repellent pulp is preferably 0.1 mm or more and 15 mm or less, more preferably 0.5 mm or more and 10 mm or less, and further preferably 1 mm or more and 5 mm or less. By setting the fiber length of the water-repellent pulp within the above range, it is possible to prevent the water-repellent pulp from falling off from the fiber-reinforced plastic molded sheet, and the water repellency of the fiber-reinforced plastic molded sheet is effective. Can be enhanced to. In addition, a molded product having excellent strength can be formed from a sheet for a fiber-reinforced plastic molded product. In this specification, the mass average fiber length is an average value of fiber lengths measured for 100 fibers.

Hereinafter, an example of the functional sheet base material applicable to the present invention will be described.
I. First example of a functional sheet base material [carbon dioxide gas generating sheet]
Hereinafter, a carbon dioxide gas generating sheet applicable as a functional sheet base material constituting the functional sheet of the present invention will be described with reference to FIGS. 3 and 4.

[First aspect]
The carbonic acid gas generating sheet that can be applied to the functional sheet base material of the present invention is a laminate having a carbonate layer and an acid layer, and has a water-absorbent sheet between the carbonate layer and the acid layer. The carbonate layer and the acid layer are obtained by arranging carbonate particles or a mixture of acid particles and a heat-sealing resin on the surface of the water-absorbent sheet and melting the heat-sealing resin by heat. It is characterized by being carbonated. In the carbonate layer, the carbonate particles are fixed in a state of being partially covered with a heat-sealing resin. Similarly, in the acid layer, the acid particles are fixed in a state of being partially covered with the heat-sealing resin. The carbon dioxide gas generating sheet of the present invention is manufactured by a dry method in order to prevent a reaction between a carbonate and an acid during the manufacturing process.

(Layer structure and action effect)
FIG. 3 is a diagram showing the configuration of the carbon dioxide gas generating sheet according to the first aspect of the present invention not for a limited purpose but for an exemplary purpose. In the figure, the same reference numerals indicate the same components. Duplicate explanations may be omitted for the same component.

The carbon dioxide gas generating sheet according to the first aspect of the present invention shown in FIG. 3A includes a water-absorbent sheet 300, a carbonate layer 130, a water-absorbent sheet 300, an acid layer 230, and a water-absorbent sheet 300. , Are stacked in order. The carbonate layer 130 is a layer formed through a step of arranging a mixture of the carbonate particles 13 and the heat-sealing resin 16 on the surface of the water-absorbent sheet 300 and heat-melting the heat-sealing resin 16. .. Further, the acid layer 230 is a layer formed through a step of arranging a mixture of the carbonate particles 23 and the heat-sealing resin 16 on the surface of the water-absorbent sheet 300 and heat-melting the heat-sealing resin 16. be.

In the configuration of FIG. 3A, in the carbonate layer 130, the carbonate particles 13 are fixed in a state where a part thereof is covered with the heat-sealing resin. Therefore, the carbonate particles 13 are difficult to be powdered from the carbon dioxide generating sheet, and the water can come into contact with the carbonate when the carbon dioxide generating sheet is used. Since the heat-sealing resin and the carbonate particles are uniformly dispersed, the carbonate particles can be uniformly arranged in the plane.

Similarly, in the acid layer 230, the acid particles 23 are fixed in a state where a part thereof is covered with the heat-sealing resin. Therefore, the acid particles 23 are difficult to be powdered from the carbon dioxide gas generating sheet, and the water can come into contact with the acid when the carbon dioxide gas generating sheet is used. Since the heat-sealing resin and the acid particles are uniformly dispersed, the acid particles can be uniformly arranged in the plane.

Further, since the water-absorbent sheet 300 is provided so as to cover the upper surfaces of the carbonate layer 130 and the acid layer 230, the possibility of powder removal of the carbonate or acid from the carbonic acid gas generating sheet can be further reduced. can. The water-absorbent sheet 300 corresponding to the outer layer of the carbon dioxide gas generating sheet is not an essential element in the present invention.

The carbon dioxide gas generating sheet shown in FIG. 3B is a water-absorbing sheet 300 provided so as to cover the upper surfaces of the carbonate layer 130 and the acid layer 230 in the configuration shown in FIG. 3A. The configuration which was replaced with the film 400 which has a relatively low air permeability is shown. In the configuration having the film 400 having low air permeability on one side, in addition to the same effect as the configuration shown in FIG. 3A, the carbon dioxide gas generated during use is prevented or suppressed from being released from the surface on the film arrangement side. Can produce the effect. Therefore, by applying the surface opposite to the surface on the film placement side to the skin, it becomes possible to apply carbon dioxide gas to the skin intensively and / or for a long period of time with directivity.

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

In the carbon dioxide generation sheet shown in FIG. 3C, a water-absorbent sheet 300, a carbonate layer 100 containing a water-absorbent material, a water-absorbent sheet 300, an acid layer 230, and a water-absorbent sheet 300 are laminated in this order. Has the same configuration. In the carbonate layer 100 containing the water-absorbent material, the absorbent material is arranged on the surface of the water-absorbent sheet 300 in addition to the mixture of the carbonate particles 13 and the heat-sealing resin 16, and the heat-sealing resin 16 is heated. It is a layer formed through a process of melting. In the carbonate layer 100 containing the water-absorbent material, the carbonate particles 13 and the absorbent material are fixed in a state of being partially covered with the heat-sealing resin 16.

The carbonic acid gas generating sheet shown in FIG. 3D is relative to the water-absorbent sheet 300, the acid layer 200 containing the water-absorbent material, the water-absorbent sheet 300, the carbonate layer 130, and the water-absorbent sheet 300. It has a structure in which a film 400 having low air permeability and a film 400 having low air permeability are laminated in order. In the acid layer 200 containing the water-absorbent material, the absorbent material is arranged on the surface of the water-absorbent sheet 300 in addition to the mixture of the acid particles 23 and the heat-sealing resin 16, and the heat-sealing resin 16 is heat-melted. It is a layer formed through the process. In the acid layer 200 including the water-absorbent material, the acid particles 23 and the absorbent material are fixed in a state of being partially covered with the heat-sealing resin 16.

In FIGS. 3 (c) and 3 (d), the absorbent material is blended in only one of the carbonate layer and the acid layer, but the absorbent material may be blended in both layers. As described above, in the configuration in which the water-absorbent material is further added to the carbonate layer and / or the acid layer, the same effect as that of the configuration shown in FIG. 3 (a) or FIG. 3 (b) is obtained, and the carbonate and the acid are obtained. Can be dispersed in the thickness direction of the layer due to the presence of the water-absorbent material. In addition, the water-absorbent material is capable of gradually infiltrating moisture. Therefore, when the carbon dioxide generation sheet is used, the time for starting the reaction between the carbonate and the acid can be varied, and as a result, the duration of carbon dioxide generation as a whole of the carbon dioxide generation sheet is lengthened. can do.

Further, in the layer containing the water-absorbent material, particularly when the water-absorbent material is fibrous, the carbonate or acid is easily maintained in the layer due to the presence of the water-absorbent material. Further, the carbon dioxide gas generating sheet is easy to maintain its shape because the carbonate layer and / or the acid layer contains a water-absorbent material. Therefore, it is possible to improve the yield of carbonate and / or acid during the production, storage and use of the carbon dioxide generation sheet, and prevent powder from falling even when it is deformed, for example, when it is folded. be able to. Therefore, the loss of the carbon dioxide generator is prevented, which leads to cost reduction. In addition, cost reduction can be achieved by selecting the water-absorbent material itself.

The configuration of the carbon dioxide gas generating sheet according to the first aspect of the present invention has been described above with reference to FIGS. 3 (a) to 3 (d). However, these are examples, and other configurations and combinations of each configuration are also included in the scope of the present invention.

For example, the carbon dioxide generation sheets shown in FIGS. 3A to 3D each include a plurality of layers of the water-absorbent sheet 300, but these layers do not necessarily have to be the same material.

For example, the water-absorbent sheet 300 corresponding to the intermediate layer of the carbon dioxide generation sheet may be a water-absorbent sheet 500 (not shown) having high water retention and capable of slowly releasing water inside. In the configuration in which the water-absorbent sheet 500 having such high water retention is arranged between the carbonate layer 130 and the acid layer 230, the moisture such as the lotion applied to one surface at the time of use is gradually applied over time. Can penetrate the other surface. Therefore, the time for starting the reaction between the carbonate and the acid can be varied, and the carbon dioxide generation of the entire carbon dioxide gas generation sheet can be sustained. The water-absorbent sheet 300 of the outer layer may be made of the same material as the water-absorbent sheet 500 having high water retention used for the intermediate layer.

(Carbonate layer)
The carbonate layer is a layer containing carbonate and / or bicarbonate.

As the carbonate or bicarbonate, when used as cosmetics, any grade that can be used in cosmetics can be used without particular limitation, and when used for other purposes, no particular grade is specified. For example, sodium carbonate, sodium hydrogencarbonate, sodium sesquicarbonate, potassium carbonate, potassium hydrogencarbonate, calcium carbonate, magnesium carbonate, magnesium bicarbonate, calcium bicarbonate or a derivative thereof can be used. Two or more carbonates and / or bicarbonates may be used in combination. The carbonate and / or bicarbonate is a solid composition, preferably in the form of particles, for example. The carbonate and / or bicarbonate may be supported on a carrier such as silica. Further, the carbonate and / or the bicarbonate may contain water as water of crystallization. When water of crystallization is contained, the solubility in water is high and the reactivity is improved. However, from the viewpoint of storage stability, it is preferable that the carbonate layer does not contain water that causes deterioration such as hydrolysis and reaction with an acid. As the carbonate or bicarbonate used in the present invention, particles having an average particle diameter of 5 to 5000 μm are preferable. When the average particle size is 5 to 5000 μm, the particles are less likely to fall off, and a good feeling of use can be obtained with an appropriate graininess.

The carbonate layer may further contain a heat-fusing resin in addition to the carbonate and / or bicarbonate particles. In this case, the carbonate and / or bicarbonate particles are fixed in the carbonate layer in a state where a part thereof is covered with the heat-sealing resin. Such a carbonate layer is heated by heat, for example, by arranging a mixture of carbonate and / or bicarbonate particles and a heat-sealing resin on the surface of another layer constituting the carbon dioxide gas generating sheet. It can be formed by melting a fusing resin.

(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 any particular limitation as long as it is of a grade that can be used in cosmetics, and when it is used for other purposes, no special grade is specified. 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 that is hydrolyzed to produce an acid, and the like can be used. Two or more kinds of acids may be used in combination. The acid is a solid composition, preferably in the form of particles, for example. Further, the acid may contain water as water of crystallization. When water of crystallization is contained, the solubility in water is high and the reactivity is improved. However, from the viewpoint of storage stability, it is preferable that the acid layer does not contain water that causes deterioration such as hydrolysis and reaction with carbonate. As the acid used in the present invention, particles having an average particle diameter of 5 to 5000 μm are preferable. When the average particle size is 5 to 5000 μm, the particles are less likely to fall off, and a good feeling of use can be obtained with an appropriate graininess. When the average particle size is reduced, the dissolution rate becomes faster, and the reaction proceeds immediately after getting wet with water, so the amount of CO ₂ gas generated at the initial stage of use increases. Further, when used on the skin, the graininess can be reduced. On the other hand, when the average particle size is increased, the dissolution gradually progresses when it comes into contact with water, which has the effect of prolonging the duration of carbon dioxide gas generation. In addition, increasing the average particle diameter has the effect of reducing particle dropout.

The acid layer may further contain a heat-sealing resin in addition to the acid particles. In this case, the acid particles are fixed in the acid layer in a state where a part thereof is covered with the heat-sealing resin. In such an acid layer, for example, a mixture of acid particles and a heat-fusing resin is arranged on the surface of one of the other layers constituting the carbon dioxide gas generating sheet, and the heat-fusing resin is heat-heat-fused. Can be formed by melting.

(Heat-fused resin)
The heat-sealing resin in the present invention acts as a binder for fixing the carbonate particles or the acid particles in the carbonate layer and / or the acid layer in a state where a part thereof is covered. The heat-fusing resin is, for example, carbonated by being uniformly mixed with carbonate particles or acid particles, placed on the surface of one of the other layers constituting the carbonic acid gas generating sheet, and heated and melted. Carbonate particles or acid particles can be fixed in the salt layer and / or the acid layer with a part thereof covered. The heat-fusing resin can be particles, fibers, or any other form. The heat-sealing resin is preferably in the form of particles from the viewpoint of uniform mixing with carbonate particles or acid particles in the layer forming step. Further, the heat-sealing resin is preferably fibrous from the viewpoint of joining a plurality of carbonate particles or a plurality of acid particles. The heat-fusing resin can be, for example, in the form of shortcut fibers. Heat-sealing resins of various shapes may be used in combination.

Examples of the heat-sealing 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 homopolymer or block copolymer having a melting point of 160 ° C. to 165 ° C. Polypropylene (PP) composed of, polypropylene composed of a copolymer having a melting point of 135 ° C. to 150 ° C., low melting point polyethylene terephthalate (PET) having a melting point of 110 to 190 ° C., low melting point polyamide having a melting point of 100 to 130 ° C., and a melting point of 110 ° C. Examples thereof include low melting point polylactic acid having a melting point of about 150 ° C., polybutylene succinate having a melting point of 115 ° C., and the like. A thermoplastic resin having a melting point of more than 110 ° C. is preferably used in the present invention. Two or more types of heat-sealing resins may be used in combination.

When the heat-bondable resin is fibrous, the fineness of the heat-bondable fiber is preferably 1 dtex to 120 dtex, and more preferably 1 dtex to 85 dtex. The average fiber length of the heat-sealing fibers is preferably 1 to 100 mm, more preferably 1 to 60 mm, and even more preferably 2 to 30 mm. When the fineness and the average fiber length of the heat-bondable fibers are within the above ranges, the web layer can be easily formed, and a uniform binding force and a dispersed state can be easily obtained.

When the heat-sealing resin is in the form of particles, the average particle size of the heat-sealing particles is preferably 1 to 1,000 μm, more preferably 10 to 800 μm. The average particle size of the heat-sealing resin can be appropriately selected as long as it does not completely cover the carbonate and acid particles to be used.

(Composite of heat-sealing resin)
The above-mentioned heat-sealing resin may be a complex of two or more components. For example, core-sheath fibers in which resins having different melting points are composited, side-by-side fibers using different resins in a cross section perpendicular to the longitudinal direction, core-shell particles having a core and a shell, and the like can be mentioned. Among these, core-sheath fibers are preferably used because different types of resins can be easily compounded.

As the core-sheath fiber, a core-sheath fiber having a melting point of the sheath portion lower than the melting point of the core portion is preferably used. For example, a PP / PE composite core-sheath fiber having a core portion made of polypropylene fiber (melting point 160 ° C.) and a sheath portion made of polyethylene (melting point 130 ° C.) formed on the outer periphery of the core portion can be mentioned.

Examples of other core-sheath fibers include PET / low melting point PET composite core-sheath fiber, high-density polyethylene / low-density polyethylene composite core-sheath fiber, polyethylene / low-melting point PET composite core-sheath fiber, and polyamide / low-melting point polyamide composite. Examples thereof include core sheath fibers, polylactic acid / low melting point polylactic acid composite core sheath fibers, polylactic acid / polybutylene succinate composite core sheath fibers, and the like.

Most of the general core-sheath fibers have a melting point of more than 110 ° C., and such core-sheath fibers are preferably used in the present invention.

When the core-sheath fiber having a melting point of the sheath portion lower than the melting point of the core portion is used for the carbon dioxide gas generating sheet of the present invention, when it is heated to a temperature higher than the melting point of the sheath portion and lower than the melting point of the core portion, The resin in the sheath part melts, and the resin in the core part maintains its shape. As a result, the molten resin in the sheath portion retains carbonate and / or bicarbonate in the carbonate layer and / or acid in the acid layer, as well as the water-absorbent material and the fibers in the core portion. Shows the effect of binding the constituents of the structure composed of. Therefore, the carbon dioxide gas generating sheet of the present invention can impart sheet strength while securing voids in the sheet, and can provide a soft and excellent sheet.

The complex of two or more components as described above can provide heat-sealing properties due to the presence of the heat-sealing resin exposed to the outside, and can function as a binder. Therefore, these complexes can be blended as a heat-sealing resin in the present invention.

(Water-absorbent material)
In the first aspect of the present invention, the water-absorbent material may be contained in at least one of the carbonate layer and the acid layer. As the water-absorbent material, natural fibers such as pulp, linen, cotton, silk, wool and mineral fibers, regenerated fibers such as rayon, 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 kinds of water-absorbent 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 also be used. Examples of the water-absorbent resin particles include carboxymethyl cellulose, polyvinyl alcohol, a polymer absorber (SAP), and the like.

The carbonate or acid can be dispersed within the layer due to the presence of the absorbent material. Further, since the absorbent material of the present invention can be in contact with water and a carbonate or acid dissolved in water to absorb and retain the carbon dioxide gas generating sheet, it can be released slowly. Moisture can be gradually permeated in the carbon dioxide generation sheet. Therefore, when the carbon dioxide generation sheet is used, the time for starting the reaction between the carbonate and the acid can be varied, and as a result, the duration of carbon dioxide generation as a whole of the carbon dioxide generation sheet is lengthened. can do.

(Effect promoter)
The carbon dioxide gas generating sheet of the present invention may contain one or more effect promoters depending on the intended use.

Examples of the effect accelerator include: oil-based base, moisturizing agent, feel-improving agent, surfactant, polymer, thickening / gelling agent, solvent, propellant, antioxidant, reducing agent, oxidizing agent, preservative. , Antibacterial agents, chelating agents, pH adjusters, acids, alkalis, powders, inorganic salts, UV absorbers, whitening agents, vitamins and their derivatives, antiseptic agents, anti-inflammatory agents, hair growth agents, blood circulation promoters, Stimulants, hormones, anti-wrinkle agents, anti-aging agents, tightening agents, cooling sensitizers, warming agents, wound healing promoters, irritation palliatives, painkillers, cell activators, plant / animal / microbial extracts, antipruritic agents , Keratin peeling / dissolving agents, antibacterial agents, refreshing agents, astringents, enzymes, nucleic acids, fragrances, pigments, colorants, dyes, pigments, metal-containing compounds, unsaturated monomers, polyhydric alcohols, polymer additives , Anti-inflammatory analgesics, antifungal agents, antihistamines, hypnotic sedatives, tranquilizers, antihypertensive agents, antihypertensive diuretics, antibiotics, anesthetics, antibacterial agents, antiepileptic agents, coronary vasodilators, crude drugs, adjuvants , Wetting agents, thickeners, tackifiers, antipruritic agents, keratin softening and stripping agents, oily raw materials, UV blocking agents, preservatives and bactericidal agents, antioxidants, liquid matrices, fat-soluble substances, polymer carboxylates, additions Agents, metal compounds, etc. may be mentioned.

The effect promoter can be added to, for example, one or both of the carbonate layer and the acid layer. It can also be added to other layers.

(Water absorption sheet)
As the water-absorbent sheet 300, any sheet can be used from among a sheet having a property of allowing moisture to pass through (water permeability) and a sheet having a property of absorbing moisture (water-absorbing property). The sheet having the property of allowing water to pass through (water permeability) is not limited as long as it allows water to pass through. As the sheet having the property of absorbing moisture (water absorption), a sheet capable of taking in and retaining moisture inside and releasing the moisture inside can be used. That is, it can be said that a sheet having a property of absorbing water (water absorption) applicable to the present invention is a kind of a sheet having a property of allowing water to pass through (water permeability). The water absorption sheet 300 has a water absorption rate of 60 seconds or less, more preferably 30 seconds or less, as measured according to the method for measuring the sedimentation rate specified in the JIS L1907 standard. Alternatively, the water absorption (or water flow) speed by the dropping method specified in JIS L1907 standard is 60 seconds or less, and more preferably 30 seconds or less. The lower the water absorption of the water-absorbent sheet 300, the faster the speed at which water passes, and in the carbon dioxide gas generation sheet using this, the reaction between the carbonate and the acid proceeds rapidly, and carbon dioxide gas is intensively generated in a short time. Can be made to. Further, as the water absorption sheet 300 has a higher water absorption (moisture retention capacity), the start of the reaction between the carbonate and the acid can be delayed, so that the duration of carbon dioxide generation in the entire carbon dioxide generation sheet is sustained. Can be lengthened. The water-absorbent sheet 300 can be, for example, a non-woven fabric, a cloth or a sheet having another mesh structure, and can be, for example, a special non-woven fabric such as Warif (registered trademark).

As the water-absorbent sheet 500 having high water retention, any sheet having a property of being able to gradually release the water passing through the inside or the water absorbed inside over time can be used.

Further, for the purpose of imparting design and improving the wiping property when used as a cleaning product, the surface of the water-absorbent sheet, which is the outer layer of the carbon dioxide gas generating sheet, may be subjected to surface treatment such as unevenness.

By using a thick sheet or a low-density sheet as the water-absorbent sheet used for the surface, there is an effect of reducing the graininess appearing on the outer surface of the carbon dioxide gas generating sheet. On the other hand, if a thin sheet or a sheet with high water permeability and breathability is used, it is difficult to prevent the infiltration of water from the surface of the carbon dioxide generating sheet and the release of the generated carbon dioxide to the outside, and the immediate effect of carbon dioxide generation is achieved. Easy to get. The water-absorbent sheet is appropriately selected according to the intended use and purpose.

(the film)
The film 400 has flexibility so that the carbon dioxide generating sheet can be applied along the skin or a curved surface at the time of use, and is more breathable than other layers of the carbon dioxide generating sheet, particularly the water absorbing sheet 300. Any film having relatively low properties can be used.

The lower the air permeability of the film, the higher the effect of preventing / suppressing the release of carbon dioxide gas generated when the carbon dioxide gas generating sheet is used from the surface on the film arrangement side. Therefore, by applying the surface opposite to the surface on the film placement side to the skin or the part to be cleaned, carbon dioxide gas can be applied intensively and / or for a long time to the skin or the application part. It has the effect of becoming. On the other hand, if the air permeability is low, stuffiness during use is likely to occur, so the film may have appropriate air permeability. For example, the air permeability measured by the "textile and knitted fabric test method" 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 /. A film of s or less can be used. This air permeability is a unit area when a predetermined pressure is applied and the amount of air passing through the film per unit time, and the larger the value, the higher the air permeability. By using another layer of the carbon dioxide gas generating sheet, particularly a film having a relatively low air permeability as compared with the water absorbing sheet, it is possible to give directivity to the permeation of carbon dioxide gas.

Examples of the film include resin films such as polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene.

(Content ratio of each component)
From the viewpoint of cost, the carbonate and the acid in the carbon dioxide generation sheet are preferably used in chemical equivalents, but in consideration of the effect on the skin, the acid is over-blended and the pH after the reaction is about 5. It can also be adjusted to be. Further, the preferable blending ratio of the carbonate and the acid may differ due to the difference in solubility due to factors such as the particle size of the carbonate and the acid, and can be appropriately adjusted.

In each of the carbonate layer and the acid layer, the content ratio (mass basis) of the carbonate or acid to the heat-sealing resin can be, for example, 2/98 to 98/2, and 5/95 to 95 /. It can be 5 and can be 10/90 to 90/10. When the ratio is within the above range, the carbonate and the acid in the in-plane direction of the carbon dioxide gas generating sheet can be uniformly blended, and powder dropping can be suppressed.

When a water-absorbent material is further contained in each of the carbonate layer and the acid layer, the content ratio (mass basis) of the carbonate or acid, the heat-fusing resin, and the absorbent material is, for example, 2/49 /. It can be 49 to 96/2/2, 6/47/47 to 94/3/3, and 10/45/45 to 90/5/5. When the ratio is in the above range, the carbonate and the acid can be uniformly arranged in the in-plane direction of the carbon dioxide gas generating sheet, and may be dispersed in the layer due to the presence of the water-absorbent material. can. Further, since the absorbent material of the present invention can be in contact with water and a carbonate or acid dissolved in water to absorb and retain the carbon dioxide gas generating sheet, it can be released slowly. Moisture can be gradually permeated in the carbon dioxide generation sheet. Therefore, when the carbon dioxide generation sheet is used, the time for starting the reaction between the carbonate and the acid can be varied, and as a result, the duration of carbon dioxide generation as a whole of the carbon dioxide generation sheet is lengthened. can do.

In addition, one or more effect promoters can be blended in an appropriate amount in one or more layers of the carbonate layer, the acid layer and the other layers.

(Basis weight)
The basis weight of the carbon dioxide gas generating sheet can be appropriately set according to the application. For example, it is preferably 30 to 300 g / m ² .

<Manufacturing method of carbon dioxide generation sheet>
As a method for producing a carbonic acid gas generating sheet according to the first aspect of the present invention, for example, acid particles or carbonate particles are heat-sealed with a carrier sheet for transporting a web layer, for example, polyethylene (PE). A uniform mixture with the sex resin is placed, a web layer to be a water-absorbent sheet is laminated on the uniform mixture, and a heat-fusing resin such as polyethylene (PE) with carbonate particles or acid particles is further laminated on the web layer. There is a method of arranging a uniform mixture with and further, further arranging a carrier sheet on the uniform mixture, and melting and joining the heat-sealing resin by heat treatment. At this time, the water-absorbent sheet of the present invention may be used as the carrier sheet to obtain a carbon dioxide gas generating sheet having a layer structure according to the first aspect of the present invention. Further, even if an arbitrary film having a relatively low air permeability as compared with the other layers is used as one of the carrier sheets, a carbon dioxide gas generating sheet having a layer structure according to the first aspect of the present invention can be obtained. good. The carrier sheet is not essential in the present invention and may be peeled off from the formed laminate after the above heat treatment. In order to prevent the reaction between the carbonate and the acid during production, in the present invention, these laminations are carried out by a dry method. Further, as another embodiment, for example, there is a method using a web forming apparatus that employs an air-laid method.

(Manufacturing method of carbon dioxide generation sheet adopting airlaid method)
The method for producing a carbon dioxide gas generating sheet according to the present embodiment, which employs the air-laid method, includes a defibration step, a mixing step, a web forming step, and a binding step.

(Defoliation process)
The defibration step is a step of defibrating a heat-sealing resin in the form of a shortcut fiber by an air flow to obtain a defibration shortcut fiber.

In the method of defibrating the shortcut fiber by air flow, an air flow is formed by a blower or the like, the shortcut fiber is supplied to the air flow, and the fiber is defibrated by the stirring effect of the air flow.

As a defibration method, it is preferable to defibrate with a swirling air flow. According to the defibration method using a swirling air flow, the shortcut fiber can be sufficiently defibrated, and the dispersibility of the defibration shortcut fiber can be further enhanced when the air-laid web is formed by the air-laid method. ..

As a defibration method using a swirling air flow, for example, a method of inserting a shortcut fiber into a blower and defibrating with a blower can be mentioned. Further, there is a method in which air is sent into the cylindrical container along the circumferential direction by a blower to form a swirling flow, a shortcut fiber is supplied into the swirling flow, and the fiber is agitated and defibrated.

The flow velocity of the air flow is appropriately selected depending on the amount of shortcut fibers, but is usually in the range of 10 to 150 m / sec.

(Mixing process)
The mixing step is a step of mixing a heat-sealing resin in the form of a defibrated shortcut fiber with a carbonate or an acid to obtain a web raw material. At the same time, any other material can be mixed. The shape of any other material may be fibrous or particulate. Examples of any other material include water-absorbent resin particles, effect-promoting agents, and other auxiliaries added as needed. The order of addition of these materials is not particularly limited, and these materials can be added in a step after the mixing step, for example, by spraying or the like.

At the time of mixing, it is preferable to stir the defibration shortcut fiber with a carbonate or an acid in order to improve the dispersibility of the defibration shortcut fiber. However, in order to prevent the defibration shortcut fiber from breaking, it is preferable to apply stirring using an air flow instead of stirring using a mechanical shearing force.

The mixing step may be performed after the defibration step or at the same time as the defibration step. When the mixing step is performed at the same time as the defibration step, the defibration shortcut fiber and the carbonate or acid are mixed by utilizing the air flow in the defibration step. Further, in the particle spraying step described later, a carbonate or acid powder may be added to the web forming line of the defibration shortcut fiber and mixed.

(Web formation process)
The web forming step is a step of obtaining air-laid web from a web raw material by an air-laid method. Here, the air-laid method is a method of forming a web by three-dimensionally randomly depositing fibers using an air flow.

(Particle spraying process)
The particle spraying step is a step of blending powder into a web raw material by a known method. Either a method of mixing powder with fibers to form a web or a method of spraying on the surface of a web or a carrier sheet may be used.

In the web forming step in the present embodiment, for example, the web forming apparatus 1 shown in FIG. 3 is used. The web forming apparatus 1 includes a conveyor 10, an air-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 air-permeable endless belt 20 is mounted on the conveyor 10 and rotates. The fiber mixture supplying means 30 supplies the fiber mixture to the air permeable endless belt 20 together with the air flow. The first carrier sheet supply means 40 supplies the first carrier sheet 41 toward the air-permeable endless belt 20. The second carrier sheet supply means 50 supplies the second carrier sheet 51 toward the first carrier sheet 41 that has passed through the air-permeable endless belt 20. The suction box 60 sucks the air-permeable endless belt 20 from the inside thereof.

In the web forming apparatus 1, the fiber mixture supply means 30 is installed above the air-permeable endless belt 20, the first carrier sheet supply means 40 is installed upstream of the air-permeable endless belt 20, and the second carrier sheet. The supply means 50 is installed downstream of the air permeable endless belt 20.

In the web forming step using the web forming apparatus 1, the conveyor 10 is driven by rotating each roller 11 in the same direction to rotate the air-permeable endless belt 20. Further, the first carrier sheet 41 is fed out from the first carrier sheet supply means 40 so as to come into contact with the air-permeable endless belt 20.

Next, while sucking the air-permeable endless belt 20 by the suction box 60, the fiber mixture is lowered from the fiber mixture supply means 30 together with the air flow, and the fiber mixture is dropped onto the first carrier sheet 41 on the air-permeable endless belt 20. , Accumulate. As a result, the air-laid web A is formed.

Next, the second carrier sheet 51 is supplied onto the air-laid web A from the second carrier sheet supplying means 50 to obtain an air-laid web-containing laminated sheet.

(Bundling process)
As the binding method, it is preferable to use a thermal bond method from the viewpoint of binding without using water. The binding step by the thermal bond method is a step of heat-treating the air-laid web to bond the defibrated shortcut fibers to each other with a heat-sealing resin.

Examples of the heat treatment of the air-laid web include hot air treatment and infrared irradiation treatment, and hot air treatment is preferable in terms of low cost of the apparatus.

For hot air treatment, a method of heat-treating the air-laid web by contacting it with a through-air dryer equipped with a rotating drum having air permeability on the peripheral surface (hot air circulation rotary drum method) or passing the air-laid web through a box-type dryer is performed. Examples thereof include a method of heat-treating by passing hot air through an air-laid web (hot air circulation conveyor oven method).

When the air-laid web is sandwiched between the first carrier sheet and the second carrier sheet to form a laminated sheet as in the present embodiment, hot air treatment may be performed with the laminated sheet as it is. The first carrier sheet and the second carrier sheet can be peeled off from the air-laid web after the hot air treatment. The heat treatment temperature may be a temperature at which the heat-sealing resin melts. For example, when using a material such as PP or PE generally used in the thermal bond method, it is desirable to set the heating temperature to 115 ° C. or higher.

After the binding step, the carbon dioxide gas generating sheet may be passed through a heating roll for compression treatment for the purpose of finely adjusting the thickness and density of the carbon dioxide generation sheet.

(Action effect)
In the above production method, the carbonate or acid particles and the heat-fusing resin can be uniformly blended. Therefore, gas can be uniformly generated in the in-plane direction of the sheet.

By blending the carbonate or acid with the heat-sealing resin, the carbonate or acid can be firmly fixed in the carbon dioxide gas generating sheet using the heat-sealing resin as a binder, so that powder falling can be prevented. ..

[Second aspect]
With reference to FIG. 4, the layer structure and the action and effect of the carbon dioxide gas generating sheet according to the second aspect of the present invention will be described. The description of the configuration similar to that of the first aspect may be omitted.

<Carbon dioxide generation sheet>
The carbonic acid gas generation sheet according to the second aspect of the present invention is a laminated body including a carbonate layer and an acid layer, and the carbonate layer and the acid layer are provided adjacent to each other, and the carbonate layer and the acid layer are provided. At least one of them is a layer containing a water-absorbent material. The carbon dioxide gas generating sheet according to the second aspect of the present invention is manufactured by a dry method in order to prevent a reaction between a carbonate and an acid during the manufacturing process.

(Layer structure and action effect)
FIG. 4 is a diagram showing the configuration of the carbon dioxide gas generating sheet according to the second aspect of the present invention not for a limited purpose but for an exemplary purpose. In the figure, the same reference numerals indicate the same components. Duplicate explanations may be omitted for the same component.

4 (a) and 4 (b) are examples 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 not containing a water-absorbent material.

Specifically, the carbon dioxide gas generating sheet shown in FIG. 4A has a structure in which an acid layer 200 containing a water-absorbent material, a carbonate layer 120 not containing a water-absorbent material, and a water-absorbent sheet 300 are laminated in this order. Has. Further, the carbon dioxide gas generating sheet shown in FIG. 2B has a structure in which a carbonate layer 100 containing a water-absorbent material, an acid layer 220 not containing a water-absorbent material, and a water-absorbent sheet 300 are laminated in this order. ..

In the configurations of FIGS. 4A and 4B, since one of the carbonate layer and the acid layer contains a water-absorbent material, the distribution of the carbonate or acid in the thickness direction of the layer is widened, and the water content during use is widened. Can be gradually infiltrated. Therefore, the time for starting the reaction between the carbonate and the acid can be varied. In addition, the carbon dioxide generation of the entire carbon dioxide generation sheet can be sustained.

In the configurations of FIGS. 4A and 4B, the water-absorbent sheet 300 is included in the surface. Therefore, at the time of use, water such as a lotion can be sufficiently permeated to promote the reaction between the carbonate and the acid. Further, since the water-absorbent sheet 300 is provided so as to cover the upper surfaces of the layers 120 and 220 that do not contain the water-absorbent material, it is possible to prevent the carbonic acid or acid from falling off from the carbon dioxide gas generating sheet. The water-absorbent sheet 300 is not an essential element in the present invention.

FIG. 4C is 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 can be widened, and water can be gradually permeated during use, so that the reaction between the carbonate and the acid can be started. You can have a range of time. Therefore, the carbon dioxide generation of the entire carbon dioxide generation sheet can be sustained.

4 (d) and 4 (e) are examples in which the water-absorbent sheet 300 is further laminated on one side or both sides with respect to the configuration shown in FIG. 4 (c). Since the water-absorbent sheet 300 is contained in the surface, water such as a lotion can be sufficiently permeated or retained at the time of use to promote the reaction between the carbonate and the acid. When the carbon dioxide gas generating sheet of the present invention contains a plurality of layers of the water-absorbent sheet 300, they do not necessarily have to be the same material. When the sheet 300 is provided on the surface, it is possible to prevent the acid or base from coming into direct contact with the skin, so that there is an effect of buffering the irritation caused by the acid or alkali.

The carbon dioxide gas generating sheet shown in FIG. 4 (f) is an example in which a film 400 having a relatively low air permeability is provided on the surface of the side having no water absorbing sheet 300 with respect to the configuration shown in FIG. 4 (d). Is.

In the configuration of FIG. 4 (f), since the film 400 having a relatively low air permeability is provided on one side, it is possible to prevent or suppress the carbon dioxide gas generated during use from being released from the surface on the film arrangement side. .. Therefore, by applying the surface opposite to the surface on the film placement side to the skin, it becomes possible to apply carbon dioxide gas intensively and / or for a long period of time to the skin.

The configuration of the carbon dioxide gas generating sheet of the present invention has been described above with reference to FIGS. 4 (a) to 4 (f). However, these are examples, and other configurations, for example, configurations in which the relationship between the carbonate and the acid are reversed in the figure, are also included in the scope of the present invention.

(Carbonate layer)
The carbonate layer is a layer containing carbonate and / or bicarbonate. As the carbonate or bicarbonate, when used as cosmetics, any grade that can be used in cosmetics can be used without particular limitation, and when used for other purposes, no particular grade is specified. For example, sodium carbonate, sodium hydrogencarbonate, sodium sesquicarbonate, potassium carbonate, potassium hydrogencarbonate, calcium carbonate, magnesium carbonate, magnesium bicarbonate, calcium bicarbonate or a derivative thereof can be used. Two or more carbonates and / or bicarbonates may be used in combination. The carbonate and / or bicarbonate is a solid composition, preferably in the form of particles, for example. The carbonate and / or bicarbonate may be supported on a carrier such as silica. The carbonate and / or bicarbonate may contain water as water of crystallization. When water of crystallization is contained, the solubility in water is high and the reactivity is improved. However, from the viewpoint of storage stability, it is preferable that the carbonate layer does not contain water that causes deterioration such as hydrolysis and reaction with an acid. In addition to carbonate and / or bicarbonate, the carbonate layer can contain a heat-fusing resin and an effect promoter. As the carbonate or bicarbonate used in the present invention, particles having an average particle diameter of 5 to 5000 μm are preferable. When the average particle size is 5 to 5000 μm, the particles are less likely to fall off, and a good feeling of use can be obtained with an appropriate graininess.

(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 any particular limitation as long as it is of a grade that can be used in cosmetics, and when it is used for other purposes, no special grade is specified. 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 that is hydrolyzed to produce an acid, and the like can be used. Two or more kinds of acids may be used in combination. The acid is a solid composition, preferably in the form of particles, for example. The acid may contain water as water of crystallization. When water of crystallization is contained, the solubility in water is high and the reactivity is improved. However, from the viewpoint of storage stability, it is preferable that the acid layer does not contain water that causes deterioration such as hydrolysis and reaction with carbonate. In addition to the solid acid, the acid layer can contain a heat-fusing resin and an effect promoter. As the acid used in the present invention, particles having an average particle diameter of 5 to 5000 μm are preferable. When the average particle size is 5 to 5000 μm, the particles are less likely to fall off, and a good feeling of use can be obtained with an appropriate graininess. When the average particle size is reduced, the dissolution rate becomes faster, and the reaction proceeds immediately after getting wet with water, so the amount of CO ₂ gas generated at the initial stage of use increases. Further, when used on the skin, the graininess can be reduced. On the other hand, when the average particle size is increased, the dissolution gradually progresses when it comes into contact with water, which has the effect of prolonging the duration of carbon dioxide gas generation. In addition, increasing the average particle diameter has the effect of reducing particle dropout.

(Layer containing water-absorbent material)
In the first aspect of the present invention described above, it has been described that at least one of the carbonate layer and the acid layer may contain a water-absorbent material. On the other hand, in the second aspect of the present invention, it is an essential constituent requirement that at least one of the carbonate layer and the acid layer contains the water-absorbent material. The layer containing the water-absorbent material is the layer containing the water-absorbent material according to the second aspect of the present invention.

(Water-absorbent material)
As the water-absorbent material, synthesis of natural fibers such as pulp, linen, cotton, silk, wool, and mineral fibers, recycled fibers such as rayon, polylactic acid, nylon, polyvinyl alcohol (PVA), and polymer absorbent fibers (SAF). Fiber can be used. The water-absorbent material can be used, for example, in the form of defibrated shortcut fibers. Two or more kinds of water-absorbent 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 also be used. Examples of the water-absorbent resin particles include carboxymethyl cellulose, polyvinyl alcohol, a polymer absorber (SAP), and the like.

The carbonate or acid can be dispersed in the layer due to the presence of the water-absorbent material and can be widely distributed in the thickness direction. Further, since the absorbent material of the present invention can be in contact with water and a carbonate or acid dissolved in water to absorb and retain the carbon dioxide gas generating sheet, it can be released slowly. Moisture can be gradually permeated in the carbon dioxide generation sheet. Therefore, when the carbon dioxide generation sheet is used, the time for starting the reaction between the carbonate and the acid can be varied, and as a result, the duration of carbon dioxide generation as a whole of the carbon dioxide generation sheet is lengthened. can do.

(Effect promoter)
The carbon dioxide gas generating sheet of the present invention may contain one or more effect promoters depending on the intended use.

Examples of the effect accelerator include: oil-based base, moisturizing agent, feel-improving agent, surfactant, polymer, thickening / gelling agent, solvent, propellant, antioxidant, reducing agent, oxidizing agent, preservative. , Antibacterial agents, chelating agents, pH adjusters, acids, alkalis, powders, inorganic salts, UV absorbers, whitening agents, vitamins and their derivatives, antiseptic agents, anti-inflammatory agents, hair growth agents, blood circulation promoters, Stimulants, hormones, anti-wrinkle agents, anti-aging agents, tightening agents, cooling sensitizers, warming agents, wound healing promoters, irritation palliatives, painkillers, cell activators, plant / animal / microbial extracts, antipruritic agents , Keratin peeling / dissolving agents, antibacterial agents, refreshing agents, astringents, enzymes, nucleic acids, fragrances, pigments, colorants, dyes, pigments, metal-containing compounds, unsaturated monomers, polyhydric alcohols, polymer additives , Anti-inflammatory analgesics, antifungal agents, antihistamines, hypnotic sedatives, tranquilizers, antihypertensive agents, antihypertensive diuretics, antibiotics, anesthetics, antibacterial agents, antiepileptic agents, coronary vasodilators, crude drugs, adjuvants , Wetting agents, thickeners, tackifiers, antipruritic agents, keratin softening and stripping agents, oily raw materials, UV blocking agents, preservatives and bactericidal agents, antioxidants, liquid matrices, fat-soluble substances, polymer carboxylates, additions Agents, metal compounds, etc. may be mentioned.

The effect promoter can be added to, for example, one or both of the carbonate layer and the acid layer. It can also be added to other layers.

(Heat-fused resin)
The heat-sealing resin in the present invention is a binder resin that binds a water-absorbent material and a carbonate or an acid. In addition, the heat-sealing resin has the effect of imparting strength to the carbon dioxide gas generating sheet, and the shape is easily maintained.

The heat-sealing resin may be in the form of fibers or may be in the form of particles. The heat-sealing resin is preferably fibrous from the viewpoint of higher strength. The heat-sealing resin may be in the form of a shortcut fiber, for example.

Examples of the heat-sealing 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 homopolymer or block copolymer having a melting point of 160 ° C. to 165 ° C. Polypropylene (PP) composed of, polypropylene composed of a copolymer having a melting point of 135 ° C. to 150 ° C., low melting point polyethylene terephthalate (PET) having a melting point of 110 to 190 ° C., low melting point polyamide having a melting point of 100 to 130 ° C., and a melting point of 110 ° C. Examples thereof include low melting point polylactic acid having a melting point of about 150 ° C., polybutylene succinate having a melting point of 115 ° C., and the like. A thermoplastic resin having a melting point of more than 110 ° C. is preferably used in the present invention. Two or more types of heat-sealing resins may be used in combination.

When the heat-bondable resin is fibrous, the fineness of the heat-bondable fiber is preferably 1 dtex to 120 dtex, and more preferably 1 dtex to 85 dtex. The average fiber length of the heat-sealing fibers is preferably 1 to 100 mm, more preferably 1 to 60 mm, and even more preferably 2 to 30 mm. When the fineness and the average fiber length of the heat-bondable fibers are within the above ranges, the web layer can be easily formed, and a uniform binding force and a dispersed state can be easily obtained.

When the heat-sealing resin is in the form of particles, the average particle size of the heat-sealing particles is preferably 1 to 1,000 μm, more preferably 10 to 800 μm. The average particle size of the heat-sealing resin can be appropriately selected as long as it does not completely cover the carbonate and acid particles to be used.

(Composite of heat-sealing resin)
The heat-sealing resin may be a complex of two or more components. For example, core-sheath fibers in which resins having different melting points are composited, side-by-side fibers using different resins in a cross section perpendicular to the longitudinal direction, core-shell particles having a core and a shell, and the like can be mentioned. Among these, core-sheath fibers are preferably used because different types of resins can be easily compounded.

As the core-sheath fiber, a core-sheath fiber having a melting point of the sheath portion lower than the melting point of the core portion is preferably used. For example, a PP / PE composite core-sheath fiber having a core portion made of polypropylene fiber (melting point 160 ° C.) and a sheath portion made of polyethylene (melting point 130 ° C.) formed on the outer periphery of the core portion can be mentioned.

Examples of other core-sheath fibers include PET / low melting point PET composite core-sheath fiber, high-density polyethylene / low-density polyethylene composite core-sheath fiber, polyethylene / low-melting point PET composite core-sheath fiber, and polyamide / low-melting point polyamide composite. Examples thereof include core sheath fibers, polylactic acid / low melting point polylactic acid composite core sheath fibers, polylactic acid / polybutylene succinate composite core sheath fibers, and the like. Most of the general core-sheath fibers have a melting point of more than 110 ° C., and such core-sheath fibers are preferably used in the present invention.

When the core-sheath fiber having a melting point of the sheath portion lower than the melting point of the core portion is used for the carbon dioxide gas generating sheet of the present invention, when it is heated to a temperature higher than the melting point of the sheath portion and lower than the melting point of the core portion, The resin in the sheath part melts, and the resin in the core part maintains its shape. As a result, the molten resin in the sheath portion retains carbonate and / or bicarbonate in the carbonate layer and / or acid in the acid layer, as well as the water-absorbent material and the fibers in the core portion. Shows the effect of binding the constituents of the structure composed of. Therefore, the carbon dioxide gas generating sheet of the present invention can impart sheet strength while securing voids in the sheet, and can provide a soft and excellent sheet.

(Water absorption sheet)
As the water-absorbent sheet 300, any sheet can be used from among a sheet having a property of allowing moisture to pass through (water permeability) and a sheet having a property of absorbing moisture (water-absorbing property). The sheet having the property of allowing water to pass through (water permeability) is not limited as long as it allows water to pass through. As the sheet having the property of absorbing moisture (water absorption), a sheet capable of taking in and retaining moisture inside and releasing the moisture inside can be used. That is, it can be said that a sheet having a property of absorbing water (water absorption) applicable to the present invention is a kind of a sheet having a property of allowing water to pass through (water permeability). The water absorption sheet 300 has a water absorption rate of 60 seconds or less, more preferably 30 seconds or less, as measured according to the method for measuring the sedimentation rate specified in the JIS L1907 standard. Alternatively, the water absorption (or water flow) speed by the dropping method specified in JIS L1907 standard is 60 seconds or less, and more preferably 30 seconds or less. The lower the water absorption of the water-absorbent sheet 300, the faster the speed at which water passes, and in the carbon dioxide gas generation sheet using this, the reaction between the carbonate and the acid proceeds rapidly, and carbon dioxide gas is intensively generated in a short time. Can be made to. Further, as the water absorption sheet 300 has a higher water absorption (moisture retention capacity), the start of the reaction between the carbonate and the acid can be delayed, so that the duration of carbon dioxide generation in the entire carbon dioxide generation sheet is sustained. Can be lengthened. The water-absorbent sheet 300 can be, for example, a non-woven fabric, a cloth or a sheet having another mesh structure, and can be, for example, a special non-woven fabric such as Warif (registered trademark).

Further, for the purpose of imparting design and improving the wiping property when used as a cleaning product, the surface of the water-absorbent sheet, which is the outer layer of the carbon dioxide gas generating sheet, may be subjected to surface treatment such as unevenness. By using a thick sheet or a low-density sheet as the water-absorbent sheet used for the surface, there is an effect of reducing the graininess appearing on the outer surface of the carbon dioxide gas generating sheet. On the other hand, if a thin sheet or a sheet with high water permeability and breathability is used, it is difficult to prevent the infiltration of water from the surface of the carbon dioxide generating sheet and the release of the generated carbon dioxide to the outside, and the immediate effect of carbon dioxide generation is achieved. Easy to get. The water-absorbent sheet is appropriately selected according to the intended use and purpose.

(the film)
The film 400 has flexibility so that the carbon dioxide generating sheet can be applied along the skin or a curved surface at the time of use, and is more breathable than other layers of the carbon dioxide generating sheet, particularly the water absorbing sheet 300. Any film having relatively low properties can be used.

The lower the air permeability of the film, the higher the effect of preventing / suppressing the release of carbon dioxide gas generated when the carbon dioxide gas generating sheet is used from the surface on the film arrangement side. Therefore, by applying the surface opposite to the surface on the film placement side to the skin or the part to be cleaned, carbon dioxide gas can be applied intensively and / or for a long time to the skin or the application part. It has the effect of becoming. On the other hand, if the air permeability is low, stuffiness during use is likely to occur, so the film may have appropriate air permeability. For example, the air permeability measured by the "textile and knitted fabric test method" specified in Japanese Industrial Standards JIS L1096: 2010 is preferably 150 cm ³ / cm ² / s or less, more preferably 200 cm ³ / cm ² . A film of / s or less can be used. This air permeability is a unit area when a predetermined pressure is applied and the amount of air passing through the film per unit time, and the larger the value, the higher the air permeability. By using another layer of the carbon dioxide gas generating sheet, particularly a film having a relatively low air permeability as compared with the water absorbing sheet, it is possible to give directivity to the permeation of carbon dioxide gas.

Examples of the film include resin films such as polyester, polyvinyl alcohol, polyethylene, polypropylene, and a composite film of polyethylene and polypropylene.

(Content ratio of each component)
From the viewpoint of cost, the carbonate and the acid in the carbon dioxide generation sheet are preferably used in chemical equivalents, but in consideration of the effect on the skin, the acid is over-blended and the pH after the reaction is about 5. It can also be adjusted to be. Further, the preferable blending ratio of the carbonate and the acid may differ due to the difference in solubility due to factors such as the particle size of the carbonate and the acid, and can be appropriately adjusted.

In each of the carbonate layer and the acid layer, the content ratio (mass basis) of the carbonate or acid to the heat-sealing resin can be, for example, 2/98 to 98/2, and 5/95 to 95 /. It can be 5 and can be 10/90 to 90/10. When the ratio is within the above range, the carbonate and the acid in the in-plane direction of the carbon dioxide gas generating sheet can be uniformly blended, and powder dropping can be suppressed.

When a water-absorbent material is further contained in each of the carbonate layer and the acid layer, the content ratio (mass basis) of the carbonate or acid, the heat-fusing resin, and the absorbent material is, for example, 2/49 /. It can be 49 to 96/2/2, 6/47/47 to 94/3/3, and 10/45/45 to 90/5/5. When the ratio is in the above range, the carbonate and the acid can be uniformly arranged in the in-plane direction of the carbon dioxide gas generating sheet, and may be dispersed in the layer due to the presence of the water-absorbent material. can. Further, since the absorbent material of the present invention can be in contact with water and a carbonate or acid dissolved in water to absorb and retain the carbon dioxide gas generating sheet, it can be released slowly. Moisture can be gradually permeated in the carbon dioxide generation sheet. Therefore, when the carbon dioxide generation sheet is used, the time for starting the reaction between the carbonate and the acid can be varied, and as a result, the duration of carbon dioxide generation as a whole of the carbon dioxide generation sheet is lengthened. can do.

In addition, one or more effect promoters can be blended in an appropriate amount in one or more layers of the carbonate layer, the acid layer and the other layers.

(Basis weight)
The basis weight of the carbon dioxide gas generating sheet can be appropriately set according to the application. For example, it is preferably 30 to 300 g / m ² .

<Manufacturing method of carbon dioxide generation sheet>
As a method for producing a carbon dioxide gas generating sheet according to the second aspect of the present invention, for example, a layer containing a water-absorbent material is produced by a web forming apparatus adopting an air-laid method, and another layer is separately laminated. The method can be used. As such, a homogeneous mixture of acid particles or carbonate particles and fused binder particles, such as polyethylene (PE), is placed on the surface of a layer containing a carbonate or acid-containing water-absorbent material. , There is a method of melting and joining a fusing binder by heat. Alternatively, when a layer containing a water-absorbent material is produced by a web forming apparatus adopting an air-laid method, a laminate is formed by using the water-absorbent sheet of the present invention as a carrier sheet for transporting the web layer. , A carbon dioxide gas generating sheet having a layer structure according to the second aspect of the present invention may be obtained. Further, each layer of the separately prepared carbon dioxide gas generating sheet may be joined by embossing or heat sealing. Further, there is also a method of providing an adhesive layer on at least one of the bonding surfaces of each layer of the carbon dioxide gas generating sheet to bond the layers. In order to prevent the reaction between the carbonate and the acid during production, in the present invention, these laminations are carried out by a dry method.

In the carbon dioxide gas generating sheet of the present invention produced by laminating by a dry method, the acid particles and the carbonate particles can exist in the state of particles in separate layers. Therefore, the carbon dioxide gas generating sheet of the present invention is stable because it is suppressed that both components easily react with each other due to the moisture in the ambient atmosphere, as compared with the configuration in which the acid particles and the carbonate particles are blended in the same layer. Excellent in sex and storage stability.

(Manufacturing method of carbonated pack sheet adopting air raid method)
The method for producing a carbonic acid pack sheet of the present embodiment, which employs the air-laid method, includes a defibration step, a mixing step, a web forming step, and a binding step.

(Defoliation process)
The defibration step is a step of defibrating a material in the form of a shortcut fiber by an air flow to obtain a defibration shortcut fiber.

In the method of defibrating the shortcut fiber by air flow, an air flow is formed by a blower or the like, the shortcut fiber is supplied to the air flow, and the fiber is defibrated by the stirring effect of the air flow.

As a defibration method, it is preferable to defibrate with a swirling air flow. According to the defibration method using a swirling air flow, the shortcut fiber can be sufficiently defibrated, and the dispersibility of the defibration shortcut fiber can be further enhanced when the air-laid web is formed by the air-laid method. ..

As a defibration method using a swirling air flow, for example, a method of inserting a shortcut fiber into a blower and defibrating with a blower can be mentioned. Further, there is a method in which air is sent into the cylindrical container along the circumferential direction by a blower to form a swirling flow, a shortcut fiber is supplied into the swirling flow, and the fiber is agitated and defibrated.

The flow velocity of the air flow is appropriately selected depending on the amount of shortcut fibers, but is usually in the range of 10 to 150 m / sec.

(Mixing process)
The mixing step is a step of mixing a water-absorbent material in the form of a defibrated shortcut fiber with a carbonate or an acid to obtain a web raw material. At the same time, any other material can be mixed. The shape of any other material may be fibrous or particulate. Examples of any other material include heat-fusing resins, water-absorbent resin particles, auxiliary agents added as needed, such as effect promoters, and the like. The order of addition of these materials is not particularly limited, and these materials can be added in a step after the mixing step, for example, by spraying or the like.

At the time of mixing, it is preferable to stir the defibration shortcut fiber and other materials in order to improve the dispersibility of the defibration shortcut fiber. However, in order to prevent the defibration shortcut fiber from breaking, it is preferable to apply stirring using an air flow instead of stirring using a mechanical shearing force.

The mixing step may be performed after the defibration step or at the same time as the defibration step. When the mixing step is performed at the same time as the defibration step, the defibration shortcut fiber and an arbitrary material are mixed by utilizing the air flow in the defibration step. Further, arbitrary particles may be charged into the web forming line of the defibration shortcut fiber in the particle spraying step described later and mixed.

(Web formation process)
The web forming step is a step of obtaining air-laid web from a web raw material by an air-laid method. Here, the air-laid method is a method of forming a web by three-dimensionally randomly depositing fibers using an air flow.

(Particle spraying process)
The particle spraying step is a step of blending powder into a web raw material by a known method. Either a method of mixing powder with fibers to form a web or a method of spraying on the surface of the web or a carrier sheet may be used.

In the web forming step in the present embodiment, for example, the web forming apparatus 1 shown in FIG. 3 is used. The web forming apparatus 1 includes a conveyor 10, an air-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 air-permeable endless belt 20 is mounted on the conveyor 10 and rotates. The fiber mixture supplying means 30 supplies the fiber mixture to the air permeable endless belt 20 together with the air flow. The first carrier sheet supply means 40 supplies the first carrier sheet 41 toward the air-permeable endless belt 20. The second carrier sheet supply means 50 supplies the second carrier sheet 51 toward the first carrier sheet 41 that has passed through the air-permeable endless belt 20. The suction box 60 sucks the air-permeable endless belt 20 from the inside thereof.

In the web forming apparatus 1, the fiber mixture supply means 30 is installed above the air-permeable endless belt 20, the first carrier sheet supply means 40 is installed upstream of the air-permeable endless belt 20, and the second carrier sheet. The supply means 50 is installed downstream of the air permeable endless belt 20.

In the web forming step using the web forming apparatus 1, the conveyor 10 is driven by rotating each roller 11 in the same direction to rotate the air-permeable endless belt 20. Further, the first carrier sheet 41 is fed out from the first carrier sheet supply means 40 so as to come into contact with the air-permeable endless belt 20.

Next, while sucking the air-permeable endless belt 20 by the suction box 60, the fiber mixture is lowered from the fiber mixture supply means 30 together with the air flow, and the fiber mixture is dropped onto the first carrier sheet 41 on the air-permeable endless belt 20. , Accumulate. As a result, the air-laid web A is formed.

Next, the second carrier sheet 51 is supplied onto the air-laid web A from the second carrier sheet supplying means 50 to obtain an air-laid web-containing laminated sheet.

(Bundling process)
As the binding method, it is preferable to use a thermal bond method from the viewpoint of binding without using water. The binding step by the thermal bond method is a step of heat-treating the air-laid web to bond the defibrated shortcut fibers to each other with a heat-sealing resin.

Examples of the heat treatment of the air-laid web include hot air treatment and infrared irradiation treatment, and hot air treatment is preferable in terms of low cost of the apparatus.

For hot air treatment, a method of heat-treating the air-laid web by contacting it with a through-air dryer equipped with a rotating drum having air permeability on the peripheral surface (hot air circulation rotary drum method) or passing the air-laid web through a box-type dryer is performed. Examples thereof include a method of heat-treating by passing hot air through an air-laid web (hot air circulation conveyor oven method).

When the air-laid web is sandwiched between the first carrier sheet and the second carrier sheet to form a laminated sheet as in the present embodiment, hot air treatment may be performed with the laminated sheet as it is. The first carrier sheet and the second carrier sheet can be peeled off from the air-laid web after the hot air treatment. The heat treatment temperature may be a temperature at which the heat-sealing resin melts. For example, when using a material such as PP or PE generally used in the thermal bond method, it is desirable to set the heating temperature to 115 ° C. or higher.

After the binding step, the carbon dioxide gas generating sheet may be passed through a heating roll for compression treatment for the purpose of finely adjusting the thickness and density of the carbon dioxide generation sheet.

(Action effect)
In the above production method, the particles and the fibers of the water-absorbent material can be efficiently contained in the layer containing the water-absorbent material. Therefore, there is little material loss and cost reduction can be achieved. In addition, a sheet with a good texture can be easily manufactured.

The carbonate or acid can be dispersed in the layer containing the water-absorbent material in the thickness direction of the layer due to the presence of the water-absorbent material. The water-absorbent material can gradually permeate the water, and when the carbon dioxide gas generating sheet is used, the reaction initiation between the carbonate and the acid can be widened. As a result, the duration of carbon dioxide generation as a whole of the carbon dioxide generation sheet can be lengthened.

II. Second example of functional sheet base material [cyclodextrin-containing sheet]
Hereinafter, a cyclodextrin-containing sheet applicable as a functional sheet base material constituting the functional sheet of the present invention will be described with reference to FIGS. 5 and 6.

The cyclodextrin-containing sheet that can be applied to the functional sheet substrate of the present invention is a sheet comprising a cyclodextrin-containing layer in which a functional component is encapsulated, and the cyclodextrin-containing layer is provided by a dry method. ..

In the present specification, the term "cyclodextrin containing a functional component" is not necessarily limited to the case where the total amount of cyclodextrin having an inclusion performance contains the maximum amount of the functional component. That is, the "cyclodextrin in which the functional component is included" in the present specification is a so-called empty state in which the functional component is not included in addition to the cyclodextrin in the state in which the functional component is included. It shall be capable of containing cyclodextrin.

The configuration of the cyclodextrin-containing sheet included in the scope of the present invention will be described with reference to FIG. FIG. 5 is a diagram showing the configuration of the cyclodextrin-containing sheet of the present invention not for a limited purpose but for an exemplary purpose. In the figure, the same reference numerals indicate the same components. Duplicate explanations may be omitted for the same component.

5 (a) to 5 (c) show a cyclodextrin-containing sheet comprising a cyclodextrin-containing layer 100 in which a functional component is encapsulated according to the present invention. FIG. 5A is a cyclodextrin-containing sheet composed of only the cyclodextrin-containing layer 100. 5 (b) and 5 (c) are cyclodextrin-containing sheets in which the other layer 300 is laminated on one side or both sides of the cyclodextrin-containing layer 100.

As described above, the cyclodextrin-containing sheet of the present invention may have a single-layer structure, or may have a two-layer, three-layer structure, or a multi-layer structure of four or more layers (not shown). The cyclodextrin-containing sheet may contain two or more cyclodextrin-containing layers 100. The other layer 300 is used for the purpose of imparting some functionality to the cyclodextrin-containing sheet, for example, for the purpose of modifying the surface of the cyclodextrin-containing sheet, for the purpose of imparting strength (rigidity) to the cyclodextrin-containing sheet, and the like. Can be arranged. For the other layer 300, for example, a sheet such as cloth, non-woven fabric, paper, or film can be used. The other layer 300 may contain a heat-sealing resin. When the cyclodextrin-containing sheet comprises a plurality of layers 300, these layers 300 may be the same material or different materials.

The cyclodextrin-containing layer 100 can contain only cyclodextrin C in which a functional component is encapsulated. At this time, it is not limited to one type, and a plurality of types of cyclodextrin C in which a functional component is encapsulated can be contained. That is, each of the functional component and cyclodextrin may be one kind or a plurality of kinds. The types of functional ingredients and the types of cyclodextrin will be described later.

Further, the cyclodextrin-containing layer 100 may contain fibers, a heat-fusing resin, an effect promoter, and the like, in addition to cyclodextrin C in which a functional component is encapsulated.

As an example of the configuration for preventing the cyclodextrin C in which the functional component is encapsulated from the cyclodextrin-containing sheet from falling off, specific embodiments as shown in the following first to sixth aspects will be described.

(First aspect)
FIG. 5D is an example in which the cyclodextrin-containing layer 100 in which the functional component is encapsulated contains the fiber F. In the cyclodextrin-containing layer 110 containing the fiber F, the cyclodextrin powder encapsulating the functional component is held in the voids formed by the fibers F, that is, the voids in the fiber structure composed of the fibers F. Prevents powder from falling off.

The cyclodextrin-containing layer 110 containing fibers can contain only cyclodextrin C and fibers F in which functional components are encapsulated. Further, the cyclodextrin-containing layer 110 containing fibers may contain a heat-sealing resin, an effect promoter, and the like, in addition to cyclodextrin C and fibers F in which functional components are encapsulated. Further, the fiber F itself may be a heat-sealing resin.

In this embodiment, in the cyclodextrin-containing sheet, the other layer 300 is laminated on one side or both sides of the cyclodextrin-containing layer 110 containing the fiber F for the purpose of imparting functionality such as surface modification and strength (rigidity). It may have a multi-layer structure (not shown).

(Second aspect)
FIG. 5 (e) is an example in which the cyclodextrin-containing layer 100 in which the functional component is encapsulated contains the heat-sealing resin A. The cyclodextrin-containing layer 120 containing the heat-sealing resin A melts the heat-sealing resin A in the mixture containing the cyclodextrin powder encapsulating the functional component and the heat-sealing resin A. It was obtained by.

In the cyclodextrin-containing layer 120 containing the heat-sealing resin A, the cyclodextrin C in which the functional component is encapsulated is in a state of being partially covered when the melted heat-sealing resin A solidifies. By being fixed, powder falling is prevented. Further, the heat-sealing resin A is blended in an amount that does not cover the entire cyclodextrin C in which the functional component is encapsulated, and the cyclodextrin C in which the functional component is encapsulated is heat-fused. It has a portion that is not covered with the dextrinous resin A, and its ability to release functional components is guaranteed.

The cyclodextrin-containing layer 120 containing the heat-fusing resin A can contain only cyclodextrin C and the heat-fusing resin A in which the functional component is encapsulated. Further, the cyclodextrin-containing layer 120 containing the heat-sealing resin A contains fibers, an effect promoter, and the like in addition to the cyclodextrin C and the heat-sealing resin A in which the functional component is encapsulated. May be. Further, the heat-sealing resin A itself may be fibrous.

In this embodiment, the cyclodextrin-containing sheet has another layer on one or both sides of the cyclodextrin-containing layer 120 containing the heat-sealing resin A for the purpose of imparting functionality such as surface modification and imparting strength (rigidity). It may have a multi-layer structure (not shown) in which 300 are laminated.

(Third aspect)
FIG. 5 (f) is an example in which the layer adjacent to the cyclodextrin-containing layer 100 in which the functional component is encapsulated contains the heat-sealing resin B. In the layer 200 containing the heat-sealing resin B adjacent to the cyclodextrin-containing layer, the heat-sealing resin B is arranged on the surface of the cyclodextrin-containing layer 100 to melt the heat-sealing resin B by heat. It was obtained by.

The cyclodextrin C in which the functional component is encapsulated contained in the cyclodextrin-containing layer 100 is formed when the heat-fused resin B melted in the layer 200 containing the heat-fused resin B adjacent thereto solidifies. The powder is prevented from falling off by being partially covered and fixed. Further, the cyclodextrin C in which the functional component is encapsulated has a portion not covered with the heat-sealing resin B, and the performance of releasing the functional component is guaranteed.

The layer 200 containing the heat-sealing resin B can contain only the heat-sealing resin B. Further, the layer 200 containing the heat-sealing resin B may contain fibers, an effect promoter, and the like in addition to the heat-sealing resin B. When these other components are contained, the layer 200 containing the heat-sealing resin B is heat-treated by arranging a mixture of the heat-sealing resin B and these other components on the surface of the cyclodextrin-containing layer 100. It can be obtained by melting the heat-sealing resin B.

The cyclodextrin-containing sheet of the example shown in FIG. 5 (f) is, in detail, a cyclodextrin-containing layer 100 composed of a layer 200 containing a heat-sealing resin B and a cyclodextrin powder encapsulated with a functional component. It has a three-layer structure including a cyclodextrin-containing layer 120 containing a heat-sealing resin A and a cyclodextrin-containing layer 120. In the case of this example, the cyclodextrin-containing layer 120 containing the heat-sealing resin A can also contribute to the prevention of powder dropping of the cyclodextrin contained in the cyclodextrin-containing layer 100 positioned as the intermediate layer. Further, although the cyclodextrin-containing layer 100 and the cyclodextrin-containing layer 120 containing the heat-sealing resin A are shown and described as separate layers, the two layers are integrally configured to form one layer. A configuration in which the cyclodextrin-containing layer 120 containing the heat-sealing resin A is formed is also included in this embodiment. According to this aspect, particularly in the cyclodextrin-containing layer 120 containing the heat-sealing resin A, when the cyclodextrin powder is unevenly distributed on the surface side, it is possible to effectively prevent the powder from falling off.

In this embodiment, the layer 200 containing the heat-sealing resin B may be provided on both sides of the cyclodextrin-containing layer in which the functional component is encapsulated.

In this embodiment, the cyclodextrin-containing sheet is used on the outer surface of the laminate of the layer 200 containing the cyclodextrin-containing layer and the heat-sealing resin B for the purpose of imparting functionality such as surface modification and strength (rigidity). It may have a multi-layer structure (not shown) in which the other layer 300 is laminated on one side or both sides of the layer.

(Fourth aspect)
The cyclodextrin-containing sheet according to the present invention described above may be formed by heat-sealing. As one example, FIG. 5 (g) shows a configuration in which another layer 300 containing a heat-sealing resin is laminated on both sides of a cyclodextrin-containing layer 100 in which a functional component is encapsulated, and the four sides are heat-sealed. Is shown.

(Fifth aspect)
FIG. 5H is an example in which an adhesive layer is provided adjacent to the cyclodextrin-containing layer 100 in which the functional component is encapsulated. The adhesive layer 500 adjacent to the cyclodextrin-containing layer is obtained by arranging the adhesive layer 500 on the surface of the cyclodextrin-containing layer. The adhesive layer is not particularly limited as long as it is a layer having an adhesive function so as to prevent the cyclodextrin contained in the cyclodextrin-containing layer 100 from falling off, and examples thereof include a hot melt adhesive.

Specifically, the cyclodextrin-containing sheet shown in FIG. 5 (h) is a hot-melt adhesive such as a thermoplastic resin between the cyclodextrin-containing layer 100 in which the functional component is encapsulated and the other layer 300. A structure in which an adhesive layer 500 made of an agent is interposed and interlayer-bonded by hot melt processing is shown.

More specifically, in the cyclodextrin-containing sheet of the example shown in FIG. 5 (h), the cyclodextrin-containing layer containing the heat-sealing resin A on the surface of the cyclodextrin-containing layer 100 opposite to the adhesive layer 500. Has 120. In the cyclodextrin-containing sheet of the example shown in FIG. 5 (h), the cyclodextrin-containing layer 120 containing the heat-sealing resin A is positioned as an intermediate layer as in the case of the example shown in FIG. 5 (f). It can contribute to the prevention of powder dropping of cyclodextrin contained in the cyclodextrin-containing layer 100. Further, although the cyclodextrin-containing layer 100 and the cyclodextrin-containing layer 120 containing the heat-sealing resin A are shown and described as separate layers, the two layers are integrally configured to form one layer. A configuration in which the cyclodextrin-containing layer 120 containing the heat-sealing resin A is formed is also included in this embodiment. According to this aspect, particularly in the cyclodextrin-containing layer 120 containing the heat-sealing resin A, when the cyclodextrin powder is unevenly distributed on the surface side, it is possible to effectively prevent the powder from falling off.

(Sixth aspect)
The cyclodextrin-containing sheet according to the present invention described above may be formed by embossing. As one example, FIG. 5 (i) shows a structure in which layers 300 are laminated on both sides of a cyclodextrin-containing layer 120 containing a heat-sealing resin A and bonded by embossing.

The configuration of the cyclodextrin-containing sheet of the present invention has been described above with reference to FIGS. 5 (a) to 5 (i). However, these are examples, and other configurations, for example, combinations of the illustrated embodiments, are also included in the scope of the present invention. For example, the layer shown as the cyclodextrin-containing layer 100 in which the functional component is encapsulated in the figure is a cyclodextrin-containing layer 110 containing a fiber F or a cyclodextrin-containing layer 120 containing a heat-sealing resin A. It may be a layer containing both the fiber F and the heat-sealing resin A. Similarly, a configuration in which layers are replaced between these layers is included in the scope of the present invention.

The details of the components of the cyclodextrin-containing sheet according to the present invention will be described below.

(Cyclodextrin-containing layer containing functional components)
The cyclodextrin-containing layer in which the functional component of the present invention is encapsulated is a layer containing cyclodextrin in a state in which the functional component is encapsulated. In the cyclodextrin-containing layer in which the functional component of the present invention is encapsulated, in addition to the cyclodextrin in the state in which the functional component is encapsulated, the so-called empty cyclodextrin in the state in which the functional component is not encapsulated. May be included. Cyclodextrin is included as a powder (particle). The cyclodextrin-containing layer in which the functional component is encapsulated can contain only the cyclodextrin in which the functional component is encapsulated. The cyclodextrin in which the functional component is encapsulated is not limited to one type, and may contain a plurality of types. Further, even if the cyclodextrin-containing layer in which the functional component is encapsulated contains fibers, a heat-sealing resin, an effect promoter, etc., in addition to the cyclodextrin in which the functional component is encapsulated. good. Further, in the present invention, the cyclodextrin-containing layer in which the functional component is encapsulated is added to the cyclodextrin in which the functional component is encapsulated (that is, the cyclodextrin in which the functional component is encapsulated). In addition to the so-called empty cyclodextrin that may contain the so-called empty cyclodextrin in the state where the functional component is not included), the cyclodextrin that does not contain the functional component (that is, the site having the inclusion performance). However, so-called empty cyclodextrin) may be further added.

(Cyclodextrin)
The cyclodextrin used in the present invention, also called cyclodextrin or cyclic oligosaccharide, has the ability to incorporate (enclose) various molecules as guests into the cavity to form an inclusion complex, and the ability to slowly release the incorporated guest molecules. Has. Cyclodextrin The number of glucose groups contained in one molecule is 6 α-cyclodextrin, 7 β-cyclodextrin, and 8 γ-cyclodextrin, all of which are compatible with the functional components to be included. Can be used in consideration of. Cyclodextrin may be chemically modified such as methylation, hydroxylation, and acetylation. Further, cyclodextrin may have a branch. These cyclodextrins can be used alone or in combination. In the present invention, cyclodextrin as described above is encapsulated with a functional component. The cyclodextrin used may contain an empty cyclodextrin that does not contain a functional component.

(Functional ingredient)
As the functional component, various functional components can be used depending on the use and purpose of the cyclodextrin-containing sheet. Examples of applications of the cyclodextrin-containing sheet will be described later.

The functional ingredients that can be used in the present invention include, for example, wasabi ingredient, mustard ingredient, chili ingredient, ginger ingredient, lemon ingredient, orange ingredient, grapefruit ingredient, yuzu ingredient, ume ingredient, matcha ingredient, almond ingredient, and natural meat. Natural or organic antibacterial agents or fragrances such as flavors, roses, herbs, plant extracts, tea extracts, natural or organic volatile antibacterial agents or fragrances such as l-menthol components, coenzyme Q10, isoflavone, etc. Cosmetic raw materials and the like.

In addition to the above, functional ingredients include, for example: medicinal ingredients, moisturizers, feel improvers, antioxidants, analgesics, oxidants, preservatives, antibacterial agents, pH adjusters, UV absorbers, whitening agents. Agents, vitamins and their derivatives, anti-inflammatory agents, anti-inflammatory agents, hair growth agents, blood circulation promoters, stimulants, hormones, anti-wrinkle agents, anti-aging agents, tightening agents, cooling agents, warming agents, wounds Healing stimulants, stimulants, analgesics, cell activators, plant / animal / microbial extracts, antipruritic agents, keratin exfoliating / dissolving agents, antibacterial agents, cooling agents, astringents, fragrances, pigments, coloring agents, anti-inflammatory analgesics Agents, antifungal agents, antihistamines, hypnotic analgesics, tranquilizers, antihypertensive agents, antihypertensive diuretics, antibiotics, anesthetics, antibacterial agents, antiepileptic agents, coronary vasodilators, crude drugs, adjuvants, moisturizers , Analgesics, keratin softening and stripping agents, preservatives and bactericidal agents, fat-soluble substances, deodorant components and other known compounds can be arbitrarily selected according to the intended use and purpose.

These functional ingredients can be used alone or in combination in a cyclodextrin-containing sheet.

(Cyclodextrin with functional ingredients included)
In the present invention, the cyclodextrin encapsulated with the functional component is used in the form of a powder (particle). Cyclodextrins in the form of powders (particles), encapsulated with functional ingredients, can be obtained by any method known in the art or can be purchased from manufacturers for sale. For example, Dixie Ace (a product using cyclodextrin) manufactured by Shiomizu Port Sugar Co., Ltd., CAVAMAX (registered trademark) manufactured by Cyclochem Co., Ltd., and the like can be preferably used. These cyclodextrins in the form of powder (particles) in which the functional component is encapsulated include the cyclodextrin in which the functional component is encapsulated and the cyclodextrin in which the functional component is not encapsulated. Cyclodextrin may be contained.

(fiber)
Examples of the fiber include pulp (for example, coniferous and / or coniferous chemical pulp, semi-chemical pulp, mechanical pulp, used paper pulp, etc.), rayon, hemp, cotton, silk, wool, natural fiber such as mineral fiber, polylactic acid, and the like. Synthetic fibers such as nylon, polyvinyl alcohol (PVA), and polymer absorbent fiber (SAF) can be used. Since these fibers have water absorbency, they can be blended as a water-absorbent material to promote the release of functional components when the cyclodextrin-containing sheet is used. When cyclodextrin containing a cooling sensation material is used as a functional component, if a fiber having high water absorption such as SAF is used as the fiber, it is possible to provide a sheet having a strong cooling sensation and a long duration. Further, as the fiber of the present invention, a non-water-absorbent fiber can also be used. The heat-fusing resin described below may be used in the form of fibers. These fibers can be used, for example, in the form of defibration shortcut fibers. Two or more of these fibers may be used in combination.

(Heat-fused resin)
The heat-fusing resin in the present invention is a binder resin that binds the constituent components. Further, the heat-fused resin has an effect of imparting strength in the cyclodextrin-containing sheet, and the cyclodextrin-containing sheet easily maintains its shape by containing the heat-fused resin.

The heat-sealing resins A and B bind cyclodextrins containing functional components to each other, and if other components are contained, cyclodextrins containing functional components and other components. Can be done. The heat-sealing resins A and B contain the functional component-encapsulated cyclodextrin when melted and solidified so as not to interfere with the release of the functional component from the functional component-encapsulated cyclodextrin. It is blended in an amount that does not cover the entire powder (particles) of.

The heat-sealing resin may be in the form of fibers or may be in the form of particles. The heat-sealing resin is preferably fibrous from the viewpoint of higher strength. The heat-sealing resin may be in the form of a shortcut fiber, for example.

Examples of the heat-sealing resin include polyethylene (PE), polypropylene, low melting point polyethylene terephthalate, low melting point polyamide, low melting point polylactic acid, polybutylene succinate and the like.

The heat-sealing resin may be a composite of two or more kinds of resins. For example, it has a core-sheath fiber composed of a core portion and a sheath portion, a side-by-side fiber in which one half and the other half in a cross section perpendicular to the longitudinal direction are made of different resins, and a core and shell made of different resins. Examples include core-shell particles.

Two or more types of heat-sealing resins may be used in combination. That is, the heat-sealing resins A and B may be the same heat-sealing resin or different heat-sealing resins. As the heat-sealing resin A and the heat-sealing resin B, one type of heat-sealing resin may be used, or a plurality of types of heat-sealing resins may be used in combination. When the cyclodextrin-containing sheet contains another layer 300 described later, and the other layer 300 contains a heat-sealing resin, the heat-sealing resin contained in the other layer 300 is heat-melting. It may be the same as or different from the adhesive resins A and B, and may be one type or a combination of a plurality of types.

(Other layers)
The cyclodextrin-containing sheet of the present invention is, in addition to the cyclodextrin-containing layers 100, 110, 120 in which functional components are encapsulated, for the purpose of imparting functionality such as surface modification and imparting strength (rigidity), etc. Layer 300 can be included.

As the other layer 300, for example, any sheet having a property of allowing moisture to pass through (water permeability) and / or a property of absorbing moisture (water absorption) such as non-woven fabric, cloth, and paper can be used. Moreover, any film can be used. The other layer 300 may contain a heat-sealing resin. By using a film having a relatively low air permeability on one surface of the cyclodextrin-containing sheet, it is possible to prevent the released functional component from being released from that surface. The surface of the other layer 300, which is the outer layer of the cyclodextrin-containing sheet, may be subjected to surface treatment such as unevenness.

(Effect promoter)
The cyclodextrin-containing sheet of the present invention may contain one or more effect promoters depending on the intended use.

Examples of the effect promoter include: oil-based base, moisturizing agent, feel-improving agent, surfactant, polymer, thickening / gelling agent, solvent, propellant, antioxidant, reducing agent, oxidizing agent, preservative. , Antibacterial agents, chelating agents, pH adjusters, acids, carbonates, alkalis, powders, inorganic salts, UV absorbers, whitening agents, vitamins and their derivatives, anti-inflammatory agents, anti-inflammatory agents, hair growth agents, blood circulation Accelerators, stimulants, hormones, anti-wrinkles, anti-aging agents, tightening agents, cooling sensitizers, warming agents, wound healing promoters, stimulants, painkillers, cell activators, plant / animal / microbial extracts , Antipruritic, keratin exfoliating / dissolving agent, antibacterial agent, cooling agent, astringent, enzyme, nucleic acid, fragrance, pigment, colorant, dye, pigment, metal-containing compound, unsaturated monomer, polyhydric alcohol, high Molecular additives, anti-inflammatory analgesics, antifungal agents, antihistamines, hypnotic sedatives, tranquilizers, antihypertensive agents, antihypertensive diuretics, antibiotics, anesthetics, antibacterial agents, antiepileptic agents, coronary vasodilators, crude drugs , Auxiliary agent, wetting agent, thickener, tackifier, antipruritic agent, keratin softening release agent, oily raw material, UV blocking agent, antiseptic bactericidal agent, antioxidant, liquid matrix, fat-soluble substance, high molecular weight carboxylic acid Examples include salts, additives, metal shavings, water-absorbent materials and the like. For example, the use of particles such as aqueous resin particles such as carboxymethyl cellulose (CMC), polyvinyl alcohol and polymer absorber (SAP) has the effects of extending the duration and improving the release efficiency of functional components.

The effect promoter can be added to the cyclodextrin-containing layers 100, 110, and 120 in which the functional component is encapsulated. When the cyclodextrin-containing sheet has a multi-layer structure including a cyclodextrin-containing layer and another layer, it can be blended in any one or a plurality of layers.

For example, when the cyclodextrin-containing sheet has a multi-layer structure, an acid may be blended in one layer and a carbonate may be blended in another layer to generate a sheet that generates carbon dioxide gas during use.

(Heat seal)
The heat seal is a method of applying heat by a heating means such as a heat sealer to bond the layers. In the present invention, for example, a cyclodextrin-containing layer comprising only a cyclodextrin encapsulated with a functional component is used as an intermediate layer, and a layer 200 containing a heat-sealing resin on both sides thereof is used as an intermediate layer. By arranging and heat-sealing the four corners, a cyclodextrin-containing sheet having a multi-layer structure can be formed.

(Adhesive layer)
The method for forming the adhesive layer is not particularly limited, but an adhesive layer obtained by hot melt processing is preferable. Hot melt processing is a processing method in which a thermoplastic resin is melted and extruded to bond a sheet to another. It can be used for interlayer adhesion when joining a cyclodextrin-containing layer to another layer.

Examples of the thermoplastic resin that can be used for hot melt processing include ethylene-vinyl acetate copolymer (EVA), and a resin generally known as a hot melt adhesive can be used.

(Embossing)
Embossing is a process in which heat is applied by pressing strongly with a stamp carved with an uneven pattern. This method can also be used for interlayer adhesion of a multilayer structure. This method can also be used to apply surface treatment such as unevenness to a cyclodextrin-containing sheet having a single-layer or multi-layer structure.

(Content ratio of each component)
The amount of cyclodextrin to be blended in the cyclodextrin-containing sheet is preferably 0.01% by mass or more of the amount of powder in the total amount of the sheet. If it is 0.01% by mass or more, the cyclodextrin inclusion component can be effectively released.

(Basis weight)
The basis weight of the cyclodextrin-containing sheet can be appropriately set according to the intended use. For example, it is preferably 10 to 4000 g / m ² .

(Formation of cyclodextrin-containing layer by dry method)
In the present invention, the cyclodextrin-containing layer in which the functional component is encapsulated is a layer provided by a dry method. The dry method that can be used in the present invention includes any layer forming method that does not use water.

(Manufacturing method of cyclodextrin-containing sheet)
For example, a cyclodextrin-containing layer in which a functional component is encapsulated is produced by a web forming apparatus that employs an air-laid method, and when another layer is contained, the other layer is separately laminated on the cyclodextrin-containing layer. A manufacturing method can be used. As such a method, a heat-fused resin B such as polyethylene (PE) is placed on the surface of a cyclodextrin-containing layer in which a functional component is encapsulated, and the heat-fused resin B is melted by heat. There is a method of letting them join. Alternatively, the cyclodextrin-containing layer (for example, the cyclodextrin-containing layer 120 containing the heat-sealing resin A) containing the functional component is produced by a web forming apparatus adopting the air-laid method. By using the other layer 300 of the present invention for the carrier sheet for transporting the web layer to be the layer 120, a laminate of the other layer 300 and the cyclodextrin-containing layer 120 is formed, and the layer according to the present invention is formed. A cyclodextrin-containing sheet having a composition may be obtained. Further, each layer of the separately prepared cyclodextrin-containing sheet may be joined by embossing or heat sealing. Further, there is also a method in which an adhesive layer (adhesive layer) is provided on at least one of the bonding surfaces of each layer of the cyclodextrin-containing sheet with a hot melt adhesive such as a thermoplastic resin, and the layers are bonded by hot melt processing. In the present invention, these layers are laminated by a dry method in order to prevent the release (outflow) of functional components and the aggregation of cyclodextrin during production.

(Manufacturing method of cyclodextrin-containing sheet adopting airlaid method)
The method for producing a cyclodextrin-containing sheet of the present embodiment, which employs the air-laid method, optionally includes a defibration step, a mixing step, a web forming step, and a binding step.

(Defoliation process)
The defibration step is a step of defibrating a material in the form of a shortcut fiber by an air flow to obtain a defibration shortcut fiber.

In the method of defibrating the shortcut fiber by air flow, an air flow is formed by a blower or the like, the shortcut fiber is supplied to the air flow, and the fiber is defibrated by the stirring effect of the air flow.

As a defibration method, it is preferable to defibrate with a swirling air flow. According to the defibration method using a swirling air flow, the shortcut fiber can be sufficiently defibrated, and the dispersibility of the defibration shortcut fiber can be further enhanced when the air-laid web is formed by the air-laid method. ..

As a defibration method using a swirling air flow, for example, a method of inserting a shortcut fiber into a blower and defibrating with a blower can be mentioned. Further, there is a method in which air is sent into the cylindrical container along the circumferential direction by a blower to form a swirling flow, a shortcut fiber is supplied into the swirling flow, and the fiber is agitated and defibrated.

The flow velocity of the air flow is appropriately selected depending on the amount of shortcut fibers, but is usually in the range of 10 to 150 m / sec.

(Mixing process)
The mixing step is a step of mixing a cyclodextrin powder (particles) in which a functional component is encapsulated and a material in the form of a defibrated shortcut fiber (if included) to obtain a web raw material. At the same time, any other material can be mixed. The shape of any other material may be fibrous or particulate. Examples of any other material include heat-fusing resins, effect promoters and other auxiliaries added as needed. The order of addition of these materials is not particularly limited, and these materials can be added in a step after the mixing step, for example, by spraying or the like.

At the time of mixing, it is preferable to stir the defibration shortcut fiber and other materials in order to improve the dispersibility of the defibration shortcut fiber. However, in order to prevent the defibration shortcut fiber from breaking, it is preferable to apply stirring using an air flow instead of stirring using a mechanical shearing force.

The mixing step may be performed after the defibration step or at the same time as the defibration step. When the mixing step is performed at the same time as the defibration step, the defibration shortcut fiber and an arbitrary material are mixed by utilizing the air flow in the defibration step. Further, cyclodextrin powder (particles) and / or arbitrary particles may be charged into the web forming line of the defibration shortcut fiber in the particle spraying step described later and mixed.

(Web formation process)
The web forming step is a step of obtaining air-laid web from a web raw material by an air-laid method. Here, the air-laid method is a method of forming a web by three-dimensionally randomly depositing fibers using an air flow.

(Particle spraying process)
The particle spraying step is a step of blending a material in the form of powder (particles) with a web raw material by a known method. Either a method of mixing a material in the form of powder (particles) with fibers to form a web or a method of spraying on the surface of the web or a carrier sheet may be used.

In the web forming step in the present embodiment, for example, the web forming apparatus 1 shown in FIG. 2 is used. The web forming apparatus 1 includes a conveyor 10, an air-permeable endless belt 20, a web raw material 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 air-permeable endless belt 20 is mounted on the conveyor 10 and rotates. The web raw material supply means 30 supplies the web raw material to the air-permeable endless belt 20 together with the air flow. The first carrier sheet supply means 40 supplies the first carrier sheet 41 toward the air-permeable endless belt 20. The second carrier sheet supply means 50 supplies the second carrier sheet 51 toward the first carrier sheet 41 that has passed through the air-permeable endless belt 20. The suction box 60 sucks the air-permeable endless belt 20 from the inside thereof.

In the web forming apparatus 1, the web raw material supply means 30 is installed above the air-permeable endless belt 20, the first carrier sheet supply means 40 is installed upstream of the air-permeable endless belt 20, and the second carrier sheet. The supply means 50 is installed downstream of the air permeable endless belt 20.

In the web forming step using the web forming apparatus 1, the conveyor 10 is driven by rotating each roller 11 in the same direction to rotate the air-permeable endless belt 20. Further, the first carrier sheet 41 is fed out from the first carrier sheet supply means 40 so as to come into contact with the air-permeable endless belt 20.

Next, while sucking the air-permeable endless belt 20 by the suction box 60, the web raw material is lowered from the web raw material supply means 30 together with the air flow, and the fiber mixture is dropped onto the first carrier sheet 41 on the air-permeable endless belt 20. , Accumulate. As a result, the air-laid web W is formed.

Next, the second carrier sheet 51 is supplied onto the air-laid web W from the second carrier sheet supplying means 50 to obtain an air-laid web-containing laminated sheet.

(Bundling process)
As the binding method, it is preferable to use a thermal bond method from the viewpoint of binding without using water. The binding step by the thermal bond method is a step of heat-treating the air-laid web to bond the defibrated shortcut fibers to each other with a heat-sealing resin.

Examples of the heat treatment of the air-laid web include hot air treatment and infrared irradiation treatment, and hot air treatment is preferable in terms of low cost of the apparatus.

For hot air treatment, a method of heat-treating the air-laid web by contacting it with a through-air dryer equipped with a rotating drum having air permeability on the peripheral surface (hot air circulation rotary drum method) or passing the air-laid web through a box-type dryer is performed. Examples thereof include a method of heat-treating by passing hot air through an air-laid web (hot air circulation conveyor oven method).

When the air-laid web is sandwiched between the first carrier sheet and the second carrier sheet to form a laminated sheet as in the present embodiment, hot air treatment may be performed with the laminated sheet as it is. The first carrier sheet and the second carrier sheet can be peeled off from the air-laid web after the hot air treatment. The heat treatment temperature may be a temperature at which the heat-sealing resin melts.

After the binding step, the cyclodextrin-containing sheet may be compressed by passing it through a heating roll for the purpose of finely adjusting the thickness and density of the sheet.

(Use of functional sheet)
The uses of the functional sheet according to the present invention are illustrated below.

The uses of the functional sheet are (1) for protection, (2) for medical use, (3) for building materials / civil engineering, (4) for hygiene, (5) for wipers, (6) for agriculture / horticulture, and (7). ) For living materials, (8) for industrial materials, (9) for experimental materials, etc.

(1) For protection, for example, protective equipment can be mentioned. A specific example of the protective product is a mask or the like.

(2) Examples of medical use include gauze, masks, sheets, antibacterial mats, poultice base cloths, poultice base cloths, and therapeutic agents for hyperarousal syndrome.

(3) Examples of building materials and civil engineering include water-impervious sheets, protective materials, and anti-corrosion materials.

(4) Examples of hygiene products include diapers, sanitary products, first aid kits, cleaning products, hand towels, masks, and the like. Specific examples of the diapers include paper diapers and the like. Specific examples of the sanitary products include napkins, tampons and the like. Specific examples of the first aid kit are gauze, first aid kit, cotton swab and the like. Specific examples of the cleaning products include wet wipes, cosmetic cotton, breast milk pads, wiping sheets, sweat absorbing sheets (for faces, sides, necks, feet, etc.), antibacterial / sterilizing sheets, antiviral sheets, etc. Anti-allergen sheet, antibacterial deodorant sheet, etc. A specific example of the mask is a disposable three-dimensional mask or the like.

(5) Examples of the wiper include a wiper, a wet wiper, an oil strainer, a copying machine cleaning material, and the like.

(6) Examples of agriculture / horticultural use include nursery sheets, solid sheets, frost-proof sheets, weed-proof sheets, and horticultural planters. When used for agriculture and horticulture, for example, it can be used to create an anaerobic environment and perform forcing cultivation.

(7) Examples of household materials include packaging materials, cleaning products, bags, food products, household goods, kitchen products, sports equipment, beauty materials, and the like. Specific examples of the cleaning product include a wiper, a chemical rag, and a scrubbing brush. A specific example of the bag is a desiccant bag or the like. Specific examples for foods include tea bags, coffee bags, food bags, freshness-preserving materials, food water-absorbing sheets, carbon dioxide injection agents, food additives and the like. Specific examples of the household goods include bath salts, eye masks, cold feeling sheets, warm feeling sheets, neck scarves, gloves, deodorant sheets, and fragrance base materials. Specific examples of the kitchen utensils include a drainer sheet, a fire extinguishing cloth, and the like. Specific examples of the sporting goods include fatigue recovery materials. Beauty materials include face masks, puffs, beauty packs, beauty gloves and the like.

(8) Examples of industrial materials include industrial materials, electrical materials, batteries, product materials, OA equipment, AV equipment, rolls, equipment members, and the like.

(9) Examples of experimental materials include anaerobic environment forming materials, anesthetics, and insect attractants.

The functional sheet of the present invention is, in particular, an agricultural material such as an insect attractant, an anaerobic environment forming material, an anesthetic, a fatigue recovery material, a fragrance base material, an insect repellent, an antibacterial / antiviral sheet, an experiment. It can be preferably used in the fields of materials, cosmetics, pharmaceutical parts, pharmaceuticals, cleaning supplies, miscellaneous goods and the like.

(Usage form of functional sheet)
The functional sheet of the present invention is a functional sheet that exerts its function by a reaction mediated by water when used in a form in which at least a part thereof is in contact with water. The functional sheet of the present invention is particularly preferably used as a water-sucking type functional sheet.

FIG. 2 shows a non-limiting example of the usage pattern of the functional sheet of the present invention.
(Functional sheet kit)
As shown in FIG. 2, the functional sheet 1101 according to the present invention and the container 1105 containing water 1106 for contacting at least a part of the functional sheet 1101 are combined to form a functional sheet kit. be able to.

According to the kit including the functional sheet and the container for containing water, the functional sheet can be installed without the need for other tools.

The container 1105 may be in the form of containing a material capable of supplying water. The material capable of supplying water can be, for example, a sponge or a non-woven fabric impregnated with water. Further, the water contained in such a container may be liquid water or may be in the form of a hydrogel. Here, the hydrogel refers to a polymer material containing water, and for example, agar or the like can be used. A water-containing gel is also a material capable of supplying water, which is applicable to the present invention. According to such a configuration, when the functional sheet is used, it is prevented that water overflows or drips from the container, and the possibility of polluting the surroundings is reduced.

Further, in the case of a two-agent reaction type functional sheet kit, one of the functional components may be added to a sponge, a non-woven fabric, or a water-containing gel for the purpose of extending the duration. This makes it possible to control the time until the water contained in the sponge or non-woven fabric, the water-containing gel, or the functional component dissolved when the water is contained comes into contact with the other functional component.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited to the following Examples. In the examples and comparative examples shown below, a carbon dioxide gas generating sheet that generates carbon dioxide gas by the reaction of carbonate and acid via water was adopted as the functional sheet.

[Example 1]
<Manufacturing of carbon dioxide generation sheet>
As a functional sheet, a carbon dioxide gas generating sheet was manufactured. First, pulp (NBKP) and short-cut core-sheath type heat-sealing composite fiber (PP / PE composite core-sheath fiber, sheath melting point 130 ° C.) are defibrated using a swirling jet stream defibrator. Fiber treatment was performed to obtain each defibrated fiber.

Next, the pulp in the form of defibrated fibers and the heat-fusing composite fiber are uniformly mixed by an air flow at a ratio of 70/30 (mass ratio), and the pulp / heat-fusing composite fiber (PP /). A fiber mixture of PE) was obtained.

Citric acid and polyethylene (PE) powder were mixed at a ratio of 80/20 (mass ratio) to obtain a particle mixture of citric acid / PE powder. Similarly, sodium bicarbonate and PE powder were mixed at a ratio of 80/20 (mass ratio) to obtain a particle mixture of sodium bicarbonate / PE powder.

Then, after spraying the particle mixture of citric acid / PE powder on the carrier sheet, the air-laid web was formed from the fiber mixture using the web forming apparatus 1 shown in FIG. 7.

Specifically, a first carrier made of rayon spunlace non-woven fabric (basis weight 28 g / m ² ) is provided by a first carrier sheet supplying means 40 on an air-permeable endless belt 20 mounted on a conveyor 10 and traveling. The sheet 41 was drawn out.

While sucking the air-permeable endless belt 20 by the suction box 60, a particle mixture of citric acid / PE powder is sprayed on the first carrier sheet 41 so as to be 50 g / m ² , and a fiber mixture is sprayed on the particle mixture. The fiber mixture was dropped and deposited from the supply means 30 together with an air stream to form an air-laid web. At that time, the fiber mixture was supplied so that the basis weight of the fiber mixture per the air-laid web portion was 30 g / m ² .

Then, a particle mixture of sodium bicarbonate / PE powder was sprayed and deposited on the air-laid web so as to be 100 g / m ² . A second carrier sheet 51 made of a rayon spunlace non-woven fabric (basis weight 28 g / m ² ) was laminated thereto to obtain an air-laid web-containing laminated sheet.

The obtained laminated sheet was passed through a box-type dryer of a hot air circulation conveyor oven type and treated with hot air at 140 ° C. to obtain a carbon dioxide gas generating sheet A.

The obtained carbon dioxide gas generating sheet A was cut out so as to form a rectangle having a width of 5 × a length of 10 cm when viewed from the upper surface. A plurality of 5 mm × 2.5 cm rectangular cuts were made at 1 cm intervals from one long side of the sheet A toward the virtual center line of the rectangle parallel to the long side. On the other hand, a rectangular cut of 5 mm × 2.5 cm is made from the other long side of the sheet A toward the virtual center line at an interval of 1 cm, and the cut and the long side from the one long side. It was put so that it was arranged alternately in the length direction of.

[Example 2]
A carbon dioxide gas generating sheet B of Example 2 was obtained in the same manner as in Example 1 except that the region removed as the cut portion in Example 1 was heat-sealed instead of being removed to obtain a heat-sealed region.

[Comparative Example 1]
A carbon dioxide gas generating sheet of Comparative Example 1 was obtained in the same manner as in Example 1 except that no cut was made. That is, Comparative Example 1 corresponds to the functional sheet base material of the functional sheet (carbon dioxide gas generating sheet) of Example 1.

<Evaluation test>
The sheets of Examples 1, 2 and Comparative Examples were hung so that the short side of the rectangle was the lower side and the portion 1 cm from the bottom was immersed in water, and the generation of carbon dioxide gas was sustained by visual evaluation. The time to do was measured.
The measurement results were as follows.

[Example 3]

<Manufacturing of odor generation sheet>
As a functional sheet, an odor generating sheet was manufactured. Shortcut core-sheath type heat-sealing composite fiber (PET / low melting point PET composite core-sheath fiber, sheath melting point 130 ° C) is defibrated using a swirling jet stream defibrator to defibrate the shortcut. I got the fiber.

Cyclodextrin encapsulated with a ginger component and polyethylene (PE) powder were mixed at a ratio of 80/20 (mass ratio) to obtain a particle mixture of cyclodextrin / PE powder.

Then, after spraying the particle mixture on the carrier sheet, the web forming apparatus 1 shown in FIG. 7 was used to obtain a sheet on which the airlaid web was formed from the fiber mixture.

Specifically, a first carrier made of rayon spunlace non-woven fabric (basis weight 28 g / m ² ) is provided by a first carrier sheet supplying means 40 on an air-permeable endless belt 20 mounted on a conveyor 10 and traveling. The sheet 41 was drawn out.

While sucking the air-permeable endless belt 20 by the suction box 60, the particle mixture is sprayed on the first carrier sheet 41 so as to be 20 g / m ² , and the air flow from the fiber mixture supply means 30 onto the particle mixture. At the same time, the above-mentioned defibration shortcut fiber was dropped and deposited. At that time, the fiber mixture was supplied so that the basis weight of the shortcut fiber per the air-laid web portion was 280 g / m ² .

Next, a second carrier sheet 51 made of rayon spunlace non-woven fabric (basis weight 28 g / m ² ) was laminated on the web to obtain an air-laid web-containing laminated sheet.

The obtained laminated sheet was passed through a box-type dryer of a hot air circulation conveyor oven type, treated with hot air at 140 ° C., and pressed with a roll press to obtain an odor generating sheet A having a basis weight of 356 g / m ² . JIS P 8125 Paper and paperboard The Taber rigidity of the odor generating sheet C measured according to the Taber stiffness tester method was 6.5 mN · m.

The obtained odor generating sheet C was punched into a mosquito coil shape to obtain a processed product C-1 having a spiral portion having a length of 50 cm. As shown in FIG. 2 (c), 1 cm of the end portion of the obtained mosquito coil-shaped processed product C-1 was immersed in water so that only the tip portion was immersed in water, and after 1 minute and 30 minutes. The presence or absence of odor was measured after 1 hour, 5 hours, 24 hours, and 48 hours.

As a result, I could feel the smell of ginger at any measurement timing. The water absorption length from the end liquid surface after 24 hours was 80 mm, and the water absorption length after 48 hours was 100 mm.

By processing it into a spiral shape, it was possible to obtain a processed product that emits odor for a long time with a small installation area.

[Comparative Example 2]
A fiber mixture containing short-cut core-sheath type heat-sealing composite fiber (PET / low melting point PET composite core-sheath fiber, sheath melting point 130 ° C.) and pulp (NBKP) in a ratio of 20/80 is used. An odor generation sheet D was obtained in the same manner as in the examples except for the above. JIS P 8125 Paper and paperboard The Taber rigidity of the odor generating sheet D measured according to the Taber stiffness tester method was 0.5 mN · m.

The odor generation sheet D was punched into a mosquito coil shape, but the shape could not be maintained.

1 Web forming apparatus 13 Carbonate particles 16 Heat-fusing resin 23 Acid particles 30 Fiber mixture supply means 41 First carrier sheet 51 Second carrier sheet A Airlaid web 100 Carbonate layer 120 including water-absorbent material 120 Water-absorbent material Acid layer 130 without water-absorbent layer 200 Acid layer with water-absorbent material 220 Acid layer without water-absorbent material 230 Acid layer 300, 500 Water-absorbent sheet 400 Film 1101 (A, B, C, D, D1, D2) Functional sheet 1105 Container 1106 Water

Claims (6)

It contains an absorbent material and a functional component, and when used in a form in which at least a part thereof is in contact with water, the water is sucked up and the functional component exerts its function by a reaction through the water. , A water suction type functional sheet,
The functional sheet has an inhibitory region in which the movement of the water at the time of sucking up water is hindered when the functional sheet is immersed in water so that only the end portion of the functional sheet is immersed in water.
JIS P 8125 Paper and paperboard A functional sheet having a Taber rigidity of 0.8 mN · m or more as measured according to the Taber stiffness tester method. The functional sheet according to claim 1, wherein the inhibition region is a high-density portion of the functional sheet having a higher density than the periphery of the inhibition region. The functional sheet according to claim 1 or 2, wherein the inhibition region is a perforated portion in the functional sheet. The functional sheet according to any one of claims 1 to 3, wherein the inhibition region is a notched portion in the functional sheet. The functional sheet according to any one of claims 1 to 4, wherein the functional sheet has a plurality of inhibition regions. A functional sheet comprising the functional sheet according to any one of claims 1 to 5 and a container for containing the water so that only the end portion of the functional sheet is immersed in water and brought into contact with the functional sheet. kit.

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