JP5726128B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article.

  In recent years, an attempt has been made to increase the added value as a product by imparting a function other than the basic function of absorbing and retaining a liquid (for example, wearer's excrement) to the absorbent article.

  For example, in order to provide functions such as a deodorizing function and an antibacterial function, an absorbent article in which an absorbent containing a herbal medicine material is disposed between a top sheet and a back sheet has been proposed (for example, Patent Document 1). , 2).

JP 2008-272269 A JP 2010-110443 A

  However, in the absorbent articles described in Patent Documents 1 and 2, since the herbal medicine material contained in the absorbent body is difficult to reach the wearer's skin, the effect on the wearer's skin (for example, a skin care function or the like) is hardly exhibited. .

  Then, an object of this invention is to provide the absorbent article which can exhibit the effect (for example, skin care function etc.) of the Chinese medicine material with respect to a wearer's skin.

  In order to solve the above problems, the present invention provides a liquid-permeable top sheet provided on the skin side surface, a liquid-impermeable back sheet, and an absorption disposed between the top sheet and the back sheet. An absorbent article provided with a body, wherein a herbal medicine material layer containing an amphiphile as a binder is formed in a region where the absorbent body is disposed in the top sheet. .

  In the absorbent article of the present invention, since the herbal medicine material layer is formed on the top sheet, the herbal medicine material easily reaches the wearer's skin. Therefore, the absorbent article of this invention can exhibit the effect (for example, skin care function etc.) of the Chinese medicine material with respect to a wearer's skin.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can exhibit the effect (for example, skin care function etc.) of the Chinese medicine material with respect to a wearer's skin is provided.

FIG. 1 is a perspective view of a disposable diaper according to an embodiment of the present invention. FIG. 2 is a developed plan view showing a state in which the connection between the front surface portion and the rear surface portion is released in the disposable diaper of FIG. 1. FIG. 3 is an exploded perspective view of the disposable diaper of FIG.

  The absorbent article of the present invention includes a liquid-permeable top sheet provided on the skin-side surface, a liquid-impermeable back sheet, and an absorber disposed between the top sheet and the back sheet. In the top sheet, a traditional Chinese medicine material layer containing an amphiphile as a binder is formed in a region where the absorber is disposed (Aspect 1).

According to the aspect 1, the effect (for example, skin care function etc.) of the Chinese medicine material with respect to a wearer's skin can be exhibited.
Moreover, according to aspect 1, the following effect can be exhibited because the Chinese medicine material layer contains an amphiphilic substance as a binder. Since the strength of the herbal medicine material layer to the top sheet increases, the herbal medicine material layer is unlikely to fall off the top sheet when the liquid permeates the top sheet. In addition, when the liquid permeates the top sheet, the herbal medicine material layer is unlikely to be a barrier, so that it is possible to prevent the liquid absorption rate from being reduced (see Examples). The former effect is mainly caused by the hydrophobicity of the amphiphilic substance, and the latter effect is mainly caused by the hydrophilicity of the amphiphilic substance. Furthermore, when the liquid absorbed and retained by the absorbent body by pressurization to the absorbent article (for example, pressurization by the weight of the wearer) returns to the top sheet, the herbal medicine material layer becomes a barrier, so rewetting ( Bleeding of the liquid absorbed and held by the absorber from the top sheet) can be prevented (see Examples).

  In aspect 1, it is preferable that the said Chinese herb medicine material layer is formed in the surface on the opposite side to the skin side surface among the said top sheets (aspect 2). According to the aspect 2, it is possible to prevent the Chinese medicine material layer from being peeled off from the top sheet due to the friction between the wearer's skin and the Chinese medicine material layer. Therefore, compared with the case where a traditional Chinese medicine material layer is formed on the skin side surface of the top sheet, the amount of the traditional Chinese medicine material layer necessary for maintaining the efficacy of the traditional Chinese medicine material can be reduced.

  In Aspect 1 or 2, it is preferable that the amphiphilic substance is a cellulose polymer (Aspect 3).

  In Aspect 3, it is preferable that the cellulose polymer is carboxymethyl cellulose (Aspect 4). Carboxymethylcellulose is preferable in that it is suitable for pattern printing because it has a high viscosity and is easy to be placed on a printing plate such as gravure printing or flexographic printing in addition to high safety.

  In any one aspect of Aspects 1-4, it is preferred that the above-mentioned Chinese medicine material layer is pattern-printed (Aspect 5). According to the aspect 5, the traditional Chinese medicine material layer can be formed in various patterns.

  In Aspect 5, it is preferable that the Chinese herbal medicine material layer is printed in a dot pattern (Aspect 6). According to the aspect 6, when the liquid permeates the top sheet, the herbal medicine material layer is unlikely to be a barrier.

  In any one aspect of Aspects 1-6, it is preferred that the top sheet is a point bond nonwoven fabric, a spunbond nonwoven fabric, or an SMS nonwoven fabric (Aspect 7). The surface of these nonwoven fabrics is flatter than the air-through nonwoven fabric generally used as a top sheet, and is suitable for pattern printing of a traditional Chinese medicine material layer. In addition, since these nonwoven fabrics are thinner than air-through nonwoven fabrics, the herbal medicine material layer formed on the surface opposite to the skin-side surface tends to come into contact with the wearer's skin, and the effects of the traditional Chinese medicine materials are easily exhibited.

  In any one aspect of Aspects 1 to 7, it is preferable that a liquid-permeable second sheet is disposed between the top sheet and the absorber (Aspect 8). According to the aspect 8, since the position of the absorbent body where the liquid is absorbed and held can be moved away from the top sheet located on the skin side surface of the absorbent article to the back sheet side, it is absorbed and held by the absorbent body. It is possible to prevent the contact between the liquid and the herbal medicine material layer and the reduction of the efficacy of the herbal medicine material due to this.

  In Aspect 8, it is preferable that the second sheet is an air-through nonwoven fabric (Aspect 9). The air-through nonwoven fabric is preferable in that it has a thickness sufficient to move the position of the absorber away from the top sheet toward the back sheet.

  In any one aspect of Aspects 1 to 9, it is preferable that the absorbent article has a sheet member provided on the skin side surface in addition to the top sheet, and a Chinese medicine material layer is formed on the sheet member. (Aspect 10). According to the aspect 10, the number of places where the traditional Chinese medicine material layer can be formed increases, so that the function of the traditional Chinese medicine material layer can be enhanced and diversified. In addition, the sheet | seat member provided in the skin side surface other than a top sheet changes according to the kind of absorbent article.

  In aspect 10, it is preferable that the Chinese medicine material layer is formed in the sheet | seat member on the surface on the opposite side to the skin side surface (aspect 11). According to the aspect 11, peeling of the Chinese medicine material layer from the sheet member caused by friction between the wearer's skin and the Chinese medicine material layer can be prevented. Therefore, compared with the case where the traditional Chinese medicine material layer is formed on the skin side surface of the sheet member, the amount of the traditional Chinese medicine material layer required for maintaining the efficacy of the traditional Chinese medicine material can be reduced.

The kind and application of the absorbent article of the present invention are not particularly limited. Examples of absorbent articles include disposable diapers, sanitary napkins, panty liners, incontinence pads, and hygiene articles such as sweat removal sheets. These may be intended for humans and other than humans such as pets. Animals may be targeted. The liquid to be absorbed by the absorbent article of the present invention is not particularly limited, and examples thereof include liquid excrement and body fluid of the wearer.
Hereinafter, an embodiment of the absorbent article of the present invention will be described using a disposable diaper as an example.

  As shown in FIG.1 and FIG.2, the diaper 1 which concerns on one Embodiment of this invention is the front part 11 applied to a wearer's abdomen, the intermediate part 12 applied to a wearer's crotch part, and a wearer's And a rear surface portion 13 applied to the buttocks and / or the back portion.

  As shown in FIG. 1, in the joint portions 14 a and 14 b, the side portions 111 a and 111 b of the front surface portion 11 and the both side portions 131 a and 131 b of the rear surface portion 13 are joined to each other. A waist opening is formed by the end portion 132 of the surface portion 13, and leg openings are formed by both side portions 121 a and 121 b of the intermediate portion 12, and the diaper 1 has a pants-type shape. .

  As shown in FIGS. 1 to 3, the diaper 1 includes a liquid-permeable top sheet 2, a liquid-impermeable back sheet 3, and an absorbent body 4 provided between the top sheet 2 and the back sheet 3. The top sheet 2 includes a herbal medicine material layer 5 formed in the region where the absorber 4 is disposed. Hereinafter, these members will be described.

<Top sheet>
As shown in FIGS. 1 to 3, the top sheet 2 is provided on the skin side surface of the diaper 1. The top sheet 2 is a liquid-permeable sheet that allows the liquid excrement of the wearer to pass therethrough. Examples of the liquid permeable sheet include a nonwoven fabric, a woven fabric, a synthetic resin film in which liquid permeable holes are formed, a net-like sheet having a mesh, and the material, thickness, basis weight, density, etc. are liquid of the wearer. It can adjust suitably in the range which excrement can permeate | transmit.

  The top sheet 2 is preferably a nonwoven fabric. A nonwoven fabric can be manufactured by, for example, forming a web (fleece) and physically and chemically bonding fibers together. Examples of the web forming method include a spunbond method, a dry method (carding method, airlaid method), a wet method, and the like. Examples of a method for bonding fibers include a thermal bond method, a chemical bond method, and a needle. Examples thereof include a punch method, a stitch bond method, and a spun lace method. Examples of fibers constituting the nonwoven fabric include natural fibers (wool, cotton, etc.), regenerated fibers (rayon, acetate, etc.), inorganic fibers (glass fibers, carbon fibers, etc.), synthetic resin fibers (polyethylene, polypropylene, polybutylene, ethylene). -Polyolefin such as vinyl acetate copolymer, ethylene-ethyl acrylate copolymer, ethylene-acrylic acid copolymer, ionomer resin; Polyester such as polyethylene terephthalate, polybutylene terephthalate, polytrimethylene terephthalate, polylactic acid; And polyamides such as nylon). The fiber constituting the nonwoven fabric may be composed of a single component, or may be composed of a composite fiber such as a core / sheath fiber, a side-by-side fiber, or an island / sea fiber.

  The nonwoven fabric used as the top sheet 2 is preferably a point bond nonwoven fabric, a spun pond nonwoven fabric or an SMS nonwoven fabric. The surface of these nonwoven fabrics is flatter than the air-through nonwoven fabric generally used as a top sheet, and is suitable for pattern printing of the herbal medicine material layer 5. Moreover, since these nonwoven fabrics are thinner than the air-through nonwoven fabric, the herbal medicine material layer 5 formed on the surface opposite to the skin-side surface is likely to come into contact with the wearer's skin, and the effects of the traditional Chinese medicine material are easily exhibited.

The point bond nonwoven fabric is a nonwoven fabric in which fibers are bonded by a point bond method, and can be manufactured, for example, by heat-sealing a web formed of short fibers with a heat embossing roll. In the point bond nonwoven fabric, the fineness is usually 0.5 to 4.5 dtex, preferably 1.0 to 4.0 dtex, the fiber length is usually 30 to 60 mm, preferably 35 to 55 mm, and the basis weight is usually It is 18-40 g / m < ² >, Preferably it is 20-38 g / m < ² >, and thickness is 0.1-0.5 mm normally, Preferably it is 0.2-0.4 mm.

A spunbonded nonwoven fabric is a nonwoven fabric that is web-formed by a spunbond method.For example, a thermoplastic synthetic resin that has been heated and melted is extruded from a nozzle and stretched to directly spin continuous long fibers, and the long fibers are captured on a belt conveyor. After gathering and forming a web, it can manufacture by combining fibers. In this case, as a method for bonding the fibers, for example, a method in which the fibers are heat-sealed by their own heat, a method in which the fibers are heat-sealed with an embossing roll, or the like can be used. In the spunbonded nonwoven fabric, the fineness is usually 0.7 to 2.2 dtex, preferably 1.0 to 2.0 dtex, and the basis weight is usually 15 to 30 g / m ² , preferably 17 to 28 g / m ² . The thickness is usually 0.1 to 0.3 mm, preferably 0.15 to 0.25 mm.

The SMS nonwoven fabric is a nonwoven fabric in which a spunbond nonwoven fabric (S) and a meltblown nonwoven fabric (M) are laminated in the order of SMS. The melt blown nonwoven fabric is a nonwoven fabric formed by a melt blown method. For example, as in the spunbond method, a thermoplastic synthetic resin that has been heated and melted is directly spun, and high-temperature air is sprayed on the long fibers to further thin the fibers. After forming the web, it can be manufactured by bonding the fibers together. In this case, as a method for bonding the fibers, for example, a method in which the fibers are heat-sealed by their own heat, a method in which the fibers are heat-sealed with an embossing roll, or the like can be used. As a method for laminating the spunbond nonwoven fabric (S) and the melt blown nonwoven fabric (M), for example, heat fusion by heating, adhesion with an adhesive such as a hot melt adhesive, or the like can be used. In the SMS nonwoven fabric, the fineness is usually 0.7 to 2.2 dtex, preferably 1.0 to 2.0 dtex, and the basis weight is usually 8 to 20 g / m ² , preferably 10 to 17 g / m ² , The thickness is usually 0.1 to 0.3 mm, preferably 0.15 to 0.25 mm.

<Back sheet>
As shown in FIGS. 1 to 3, the back sheet 3 is provided on the clothing side surface of the diaper 1. The back sheet 3 is a liquid-impermeable sheet that can prevent leakage of liquid excretion absorbed and retained by the absorber 4. The back sheet 3 preferably has air permeability or moisture permeability in addition to liquid impermeability in order to reduce stuffiness when worn. Examples of liquid-impermeable sheets include waterproof nonwoven fabrics (eg, point bond nonwoven fabrics, spunbond nonwoven fabrics, spunlace nonwoven fabrics, etc.), synthetic resin (eg, polyethylene, polypropylene, polyethylene terephthalate, etc.) films, nonwoven fabrics, and the like. A composite sheet with a synthetic resin film and the like can be mentioned, and the material, thickness, basis weight, density, and the like can be appropriately adjusted within a range in which leakage of liquid excretion absorbed and retained by the absorbent body 4 can be prevented.

<Absorber>
As shown in FIG. 2, the absorber 4 is disposed so as to reach the rear surface portion 13 from the front surface portion 11 through the intermediate portion 12. The absorbent material contained in the absorbent body 4 is not particularly limited as long as it can absorb and retain the liquid excrement of the wearer. Examples of the absorbent material include a water-absorbing fiber and a highly water-absorbing material (for example, a highly water-absorbing resin and a highly water-absorbing fiber). The absorbent material layer may contain an antiblocking agent, an ultraviolet absorber, a thickening branching agent, a matting agent, a colorant, and other various improving agents.

  Examples of water-absorbing fibers include wood pulp obtained from softwood or hardwood (for example, mechanical pulp such as groundwood pulp, refiner ground pulp, thermomechanical pulp, chemithermomechanical pulp; kraft pulp, sulfide pulp, alkaline pulp, etc. Chemical pulp; semi-chemical pulp, etc.]; mercerized pulp or crosslinked pulp obtained by chemically treating wood pulp; non-wood pulp such as bagasse, kenaf, bamboo, hemp, cotton (eg cotton linter); rayon, fibril Examples include regenerated cellulose such as rayon; semi-synthetic cellulose such as acetate and triacetate, but pulverized pulp is preferred because it is low in cost and easy to mold.

  Examples of the superabsorbent material include starch-based, cellulose-based, and synthetic polymer-based superabsorbent materials. Examples of starch-based or cellulose-based superabsorbent materials include starch-acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, and crosslinked products of sodium carboxymethyl cellulose, and synthetic polymers. Examples of high water-absorbing materials include polyacrylates, polysulfonates, maleic anhydrides, polyacrylamides, polyvinyl alcohols, polyethylene oxides, polyaspartates, polyglutamates , Polyalginate-based, starch-based, and cellulose-based superabsorbent polymers (SAP), and the like. Among these, polyacrylate-based (particularly, sodium polyacrylate-based) superabsorbent Resins are preferred. Examples of the shape of the superabsorbent material include particles, fibers, and scales.

The thickness, basis weight, density, and the like of the absorbent body 4 are appropriately adjusted according to characteristics (for example, absorbency, light weight, etc.) that the diaper 1 should have. The thickness is usually 1.0 to 5.0 mm, preferably 1.2 to 4.8 mm, and the basis weight is usually 150 to 900 g / m ² , preferably 200 to 800 g / m ² .

  The absorber 4 may be covered with a covering material. The covering material is not particularly limited as long as it has liquid permeability and absorber retention, but from the viewpoint of low cost and absorber retention, a tissue formed from a pulverized pulp as a main material by a wet method is preferable.

<Herbal medicine material layer>
As shown in FIGS. 1 to 3, the herbal medicine material layer 5 is formed in the arrangement region of the absorber 4 in the top sheet 2. Thereby, the function based on the Chinese medicine material contained in the Chinese medicine material layer 5 is provided to the top sheet 2. In addition, since the herbal medicine material can easily reach the wearer's skin, the effect of the herbal medicine material on the wearer's skin (for example, a skin care function) can be exhibited.

  The herbal medicine material layer 5 is formed on substantially the entire arrangement region of the absorber 4 in the top sheet 2. Thereby, the effect (for example, skin care function etc.) of the Chinese medicine material with respect to a wearer's skin can be improved. In FIG. 1 to FIG. 3, some Chinese herbal medicine material layers 5 are omitted.

  The region where the absorber 4 is arranged is a region where the absorber 4 overlaps the top sheet 2 when the absorber 4 is projected onto the top sheet 2, and in this embodiment is substantially the entire top sheet 2 (see FIG. 2). ).

  As shown in FIGS. 1 to 3, the traditional Chinese medicine material layer 5 is formed on the surface of the top sheet 2 opposite to the skin side surface. Thereby, peeling from the top sheet 2 of the Chinese medicine material layer 5 resulting from friction with the skin of the wearer of the diaper 1 and the Chinese medicine material layer 5 can be prevented. This effect is particularly significant when the amount of the traditional Chinese medicine material layer 5 formed on the top sheet 2 is small, or when the traditional Chinese medicine material layer 5 contains an amphiphilic substance having a melting point lower than the body temperature of the wearer as a binder. is there.

  The Chinese medicine material layer 5 may be formed on the skin side surface of the top sheet 2 by modifying the present embodiment. For example, when the amount of the traditional Chinese medicine material layer 5 formed on the top sheet 2 is large, when the traditional Chinese medicine material layer 5 contains an amphiphile having a melting point higher than the body temperature of the wearer as a binder, etc. 5 may be formed on the skin side surface of the top sheet 2. When the traditional Chinese medicine material layer 5 is formed on the skin side surface of the top sheet 2, the traditional Chinese medicine material layer 5 tends to come into contact with the wearer's skin, so that the efficacy of the traditional Chinese medicine material is easily exhibited.

  The traditional Chinese medicine material contained in the traditional Chinese medicine material layer 5 can be appropriately selected based on the function to be imparted to the top sheet 2. Examples of functions that can be imparted to the top sheet 2 include skin care functions (for example, prevention of dermatitis, prevention of itchiness, prevention of rash, moisture retention, etc.), deodorization function, antibacterial function, fragrance function, heat retention function, and the like.

  When imparting a skin care function to the top sheet 2, as a Chinese herbal medicine material, for example, one kind of red ginseng, cinnamon, peony, and kakkon can be used alone or in combination of two or more kinds. In addition, the Chinese medicine material may use a commercial item, and may use what was manufactured in accordance with the conventional method.

  Examples of the form of the herbal medicine material include herbal medicine powder and herbal medicine extract.

  Traditional Chinese medicine can be pulverized according to a conventional method.

  An extract of Chinese medicine is obtained by drying and / or pulverizing Chinese medicine as an extraction raw material as necessary, and then extracting with an extraction solvent. Examples of the extraction solvent include water, a hydrophilic organic solvent, or a mixed solution thereof. Examples of the hydrophilic organic solvent include lower alcohols having 1 to 5 carbon atoms such as methanol, ethanol, propyl alcohol, and isopropyl alcohol. Lower aliphatic ketones such as acetone and methyl ethyl ketone; polyhydric alcohols having 2 to 5 carbon atoms such as 1,3-butylene glycol, propylene glycol and glycerin; The extraction solvent is preferably used at room temperature or a temperature below the boiling point.

  Extraction can be performed using a commercially available apparatus at room temperature or under reflux heating. Specifically, the extraction raw material is put into a treatment tank filled with the extraction solvent, and the soluble component is eluted with occasional stirring as necessary, followed by filtration to remove solids, thereby obtaining an extract. It is done.

  The obtained extract may be used as it is for the formation of the herbal medicine material layer 5, or subjected to treatments such as dilution, concentration, drying, purification, etc. according to a conventional method, and the diluted solution, the concentrated solution, the dried product or a crude product thereof. It may be used as a purified product or a purified product.

  The traditional Chinese medicine material layer 5 contains an amphiphilic substance as a binder in addition to the traditional Chinese medicine material. Thereby, since the adhesive strength of the Chinese herbal medicine material layer 5 to the top sheet 2 increases, the herbal medicine material layer 5 is unlikely to fall off the top sheet 2 when the liquid excrement of the wearer permeates the top sheet 2. In addition, when the wearer's liquid excrement passes through the top sheet 2, the herbal medicine material layer 5 is unlikely to become a barrier, and thus the reduction in the absorption rate of the liquid excrement can be prevented (see Examples). The former effect is mainly caused by the hydrophobicity of the amphiphilic substance, and the latter effect is mainly caused by the hydrophilicity of the amphiphilic substance. Furthermore, when the liquid excretion absorbed and held in the absorbent body 4 is returned to the top sheet 2 by pressurization of the diaper 1 (for example, pressurization by the weight of the wearer), the herbal medicine material layer 5 becomes a barrier. Therefore, it is possible to prevent rewet (seepage of liquid excretion absorbed and held by the absorbent body 4 from the top sheet 2) (see Examples).

  Examples of the amphiphilic substance include phospholipids, cellulose polymers, sterols, polyalkylene glycols, polysaccharides, higher aliphatic alcohols, higher fatty acids, higher fatty acid esters, glycerin fatty acid esters, nonionic surfactants, and the like. However, among these, phospholipids, cellulose polymers and the like are preferable.

  Examples of the phospholipid include glycerophospholipid (for example, phosphatidylcholine, phosphatidylethanolamine, phosphatidylserine, phosphadiylinositol, phosphatidylinositol polyphosphate, phosphatidylglycerol, diphosphatidylglycerol (cardiolipin), phosphatidic acid, lysophosphatidylethanol, lysophosphatidylethanol. Amines, lysophosphatidylserine, lysophosphatidylinositol, lysophosphatidylglycerol, lysophosphatidic acid, etc.), sphingophospholipids (eg, ceramide 1-phosphate derivatives such as sphingomyelin, ceramide 1-phosphonic acid derivatives such as ceramide aminoethylphosphonic acid) Etc.).

  Examples of the cellulose polymer include alkyl cellulose (for example, methyl cellulose), hydroxyalkyl cellulose (for example, hydroxyethyl cellulose, hydroxypropyl cellulose, hydroxypropyl methyl cellulose, and the like), and carboxyalkyl cellulose (for example, carboxymethyl cellulose and the like). Of the cellulose polymers, carboxymethyl cellulose is preferred. Carboxymethylcellulose is preferable in that it is suitable for pattern printing because it has a high viscosity and is easy to be placed on a printing plate such as gravure printing or flexographic printing in addition to high safety.

  Examples of sterols include cholesterol, dihydrocholesterol, lanosterol, β-sitosterol, campesterol, stigmasterol, brassicasterol, ergocasterol, fucosterol, and 3β- [N- (N ′, N′-dimethylaminoethyl). Carbamoyl] cholesterol and the like.

  Examples of the polyalkylene glycol include ethylene vinyl alcohol (EVA) and polyethylene glycol.

  Examples of polysaccharides include dextrin, amylose, amylopectin, galactan, pullulan, pectin, starch, modified starch (oxidized starch, phosphated starch, etc.), guar gum, gum arabic, xanthan gum, glucomannan, carrageenan, locust bean gum Etc.

  Examples of the higher aliphatic alcohol include cetanol, stearyl alcohol, olein alcohol, and the like.

  Examples of higher fatty acids include myristic acid, palmitic acid, stearic acid, oleic acid, linoleic acid, linolenic acid, and isostearic acid.

  Examples of higher fatty acid esters include esters of higher fatty acids and lower alcohols (for example, ethyl linoleate, isopropyl myristate, isopropyl lanolinate, isopropyl palmitate, butyl stearate, etc.), esters of higher fatty acids and higher alcohols (for example, Hexyl laurate, myristyl myristate, cetyl myristate, octyldodecyl myristate, decyl oleate, octyldodecyl oleate, octyldodecyl neodecanoate (hexyldecyl dimethyloctanoate), cetyl ethylhexanoate (cetyl isooctanoate), palmitic acid Cetyl, etc.), esters of higher fatty acids and polyhydric alcohols (eg glyceryl trimyristate, glyceryl tri (capryl / capric acid), propylene glycol dioleate Le triisostearate, glyceryl trioctanoate, etc.), other esters (e.g., cetyl lactate, myristyl lactate, diisostearyl malate, cholesteryl stearate, cholesteryl isostearate, hydroxystearic acid cholesteryl, etc.) and the like.

  Examples of the glycerol fatty acid ester include glycerol monolaurate, glycerol monomyristate, glycerol monopalmitate, glycerol monostearate and the like.

  Nonionic surfactants include, for example, sorbitan fatty acid esters (for example, sorbitan monooleate, sorbitan monoisostearate, sorbitan monolaurate, sorbitan monopalmitate, sorbitan monostearate, sorbitan sesquioleate, sorbitan trioleate). , Penta-2-ethylhexyl diglycerol sorbitan, tetra-2-ethylhexyl diglycerol sorbitan, etc.), glycerin fatty acid ester (eg mono cottonseed oil fatty acid glycerin, monoerucic acid glycerin, sesquioleate glycerin, monostearate glycerin, α, α′-oleic acid pyroglutamate glycerin, monostearate glycerin malate, etc.), propylene glycol fatty acid ester (eg monostearate Propylene glycol, etc.), lipophilic nonionic surfactants (eg, hardened castor oil derivatives, glycerin alkyl ethers, etc.), POE sorbitan fatty acid esters (eg, POE sorbitan monooleate, POE sorbitan monostearate, POE sorbitan monooleate) POE sorbitan tetraoleate, etc.), POE sorbite fatty acid ester (eg, POE sorbite monolaurate, POE sorbite monooleate, POE sorbite pentaoleate, POE sorbite monostearate, etc.), POE glycerin fatty acid ester (eg, POE glycerin) Monostearate, POE glycerin monoisostearate, POE glycerin triisostearate, etc.), POE fatty acid esters (for example, POE monooleate, OE distearate, POE monodiolate, ethylene glycol distearate, etc.), POE alkyl ether (eg, POE lauryl ether, POE oleyl ether, POE stearyl ether, POE behenyl ether, POE2-octyldodecyl ether, POE cholestanol ether, etc.), POE alkyl Phenyl ether (for example, POE octyl phenyl ether, POE nonyl phenyl ether, POE dinonyl phenyl ether, etc.), pluronic type (for example, pluronic etc.), POE / POP alkyl ether (for example, POE / POP cetyl ether, POE / POP2- Decyl tetradecyl ether, POE / POP monobutyl ether, POE / POP hydrogenated lanolin, POE / POP glycerin Tetra-POE / tetra-POP ethylenediamine condensate (eg, Tetronic), POE castor oil hydrogenated castor oil derivatives (eg, POE castor oil, POE hydrogenated castor oil, POE hydrogenated castor oil monoisostearate, POE cured) Castor oil toy isostearate, POE hydrogenated castor oil monopyroglutamic acid monoisostearic acid diester, POE hydrogenated castor oil maleic acid, etc., POE beeswax lanolin derivatives (eg POE sorbite beeswax etc.), alkanolamides (eg coconut oil fatty acid Diethanolamide, lauric acid monoethanolamide, fatty acid isopropanolamide and the like).

  As shown in FIGS. 1 to 3, the herbal medicine material layer 5 is formed in a number of dot patterns. When the herbal medicine material layer 5 has a dot-like pattern, the herbal medicine material layer 5 hardly becomes a barrier when the liquid excrement of the wearer passes through the top sheet 2. The diameter of one dot is usually 0.3 to 5 mm, preferably 0.5 to 3.5 mm. The pitch between dots is usually 1 to 8 mm in both the horizontal direction X and the vertical direction Y, preferably 3 mm. As shown in FIGS. 1-3, each dot is arrange | positioned at zigzag form.

  By modifying the present embodiment, the herbal medicine material layer 5 may have a striped pattern. However, if the herbal medicine material layer 5 is formed continuously like a stripe shape, the liquid excrement of the wearer may move along the herbal medicine material layer 5 and the liquid excretion may leak. The herbal medicine material layer 5 is preferably formed intermittently in a dot shape or the like.

  The formation of the herbal medicine material layer 5 can be performed according to a conventional method, and the formation method is not particularly limited. Examples of the forming method include pattern printing. Examples of the pattern printing include gravure printing and flexographic printing. Of these, gravure printing is preferable. When using gravure printing, printing with a fine pattern is possible, so that the herbal medicine material layer 5 formed on the top sheet 2 is likely to come into contact with the wearer's skin.

The pattern printing can be carried out according to a conventional method using an ink containing, for example, 15 to 30% by weight of a Chinese medicine material, 65 to 80% by weight of a binder, 5 to 20% by weight of a solvent and the like. The coating weight of ink is usually 0.5 to 4.0 g / m ² , preferably 1.0 to 2.5 g / m ² .

  As the solvent of the ink, water is preferable. When the solvent of the ink is water, it is difficult to irritate the wearer's skin even if a small amount of solvent remains in the Chinese medicine material layer 5.

  As shown in FIGS. 1 to 3, the diaper 1 includes a top sheet 2, a back sheet 3, an absorbent body 4 and a herbal medicine material layer 5, a liquid-impermeable cover sheet 6, and a liquid-impermeable leak-proof cuff. 7a, 7b, a liquid-impermeable leak-proof sheet 8, elastic members 91, 92, 93, 94, and the like. Hereinafter, these members will be described.

<Cover sheet>
As shown in FIGS. 1 to 3, a liquid-impermeable cover sheet 6 is provided on the skin side surface of the top sheet 2. As shown in FIGS. 1 to 3, an opening 61 is formed at substantially the center of the cover sheet 6, and a part of the top sheet 2 (a part of the arrangement region of the absorber 4) It is exposed from the opening 61 and constitutes the skin side surface of the diaper 1 together with the cover sheet 6.

  The cover sheet 6 is a liquid-impermeable sheet. Examples of the liquid-impermeable sheet include a waterproofed nonwoven fabric (for example, a point bond nonwoven fabric, a spunbond nonwoven fabric, a spunlace nonwoven fabric, etc.), a synthetic resin (for example, , Polyethylene, polypropylene, polyethylene terephthalate, etc.) film, a composite sheet of a nonwoven fabric and a synthetic resin film, and the like.

<Leak-proof cuff>
As shown in FIGS. 1 to 3, on both sides of the opening 61 of the cover sheet 6, leak-proof cuffs 7 a and 7 b made of a liquid-impermeable sheet are provided. One end of each of the leak-proof cuffs 7 a and 7 b is a fixed end sandwiched between the top sheet 2 and the cover sheet 6, and the other end is exposed from the opening 61 of the cover sheet 6. The free end to do. Elastic portions 71a and 71b extending in the longitudinal direction Y are provided at the free ends of the leak-proof cuffs 7a and 7b, and the leak-proof cuffs 7a and 7b stand up toward the wearer's skin.

<Leak-proof sheet>
As shown in FIGS. 2 and 3, a liquid-impermeable leak-proof sheet 8 is provided between the back sheet 3 and the absorber 4. The leak-proof sheet 8 is a liquid-impermeable sheet, and examples of the liquid-impermeable sheet include waterproof nonwoven fabrics (for example, point bond nonwoven fabrics, spunbond nonwoven fabrics, spunlace nonwoven fabrics, etc.), synthetic resins ( For example, polyethylene, polypropylene, polyethylene terephthalate, etc.) film, a composite sheet of a nonwoven fabric and a synthetic resin film, and the like can be mentioned.

<Elastic member>
As shown in FIGS. 1 to 3, elastic members 91, 92, 93, and 94 are provided between the back sheet 3 and the cover sheet 6 that are hourglass shapes having substantially the same dimensions. In FIG. 1, some of the elastic members 91, 92, 93, and 94 are omitted.

  As shown in FIG. 1, a waist gather is formed in the waist opening by the elastic contraction force of the elastic members 91 and 92, and a leg gather (leg) is formed in the leg opening by the elastic contraction force of the elastic members 93 and 94. Side cuff) is formed. Leakage of liquid excretion from the leg opening is prevented by the leg gathers.

  As the elastic members 91 and 92, for example, a strand-like or string-like elastic body having a thickness of about 310 to 940 dtex can be used. As the elastic members 93 and 94, for example, a strand having a thickness of about 470 to 940 dtex can be used. A string-like or string-like elastic body can be used. As the elastic members 91, 92, 93, 94, elastic fiber nonwoven fabrics having elasticity or the like may be used.

  As shown in FIGS. 2 and 3, the elastic members 91 and 92 are attached to the front surface portion 11 and the rear surface portion 13 such that the elastic members 91 and 92 can be contracted in the expanded state in the lateral direction X and separated in the longitudinal direction Y. ing. As shown in FIGS. 2 and 3, the elastic member 93 includes portions 93 a and 93 b extending along both side portions 121 a and 121 b of the intermediate portion 12, and a portion 93 c extending in the lateral direction X and connecting the portions 93 a and 93 b. have. 2 and 3, the elastic member 94 includes portions 94a and 94b extending along both side portions 121a and 121b of the intermediate portion 12, and a portion 94c extending in the lateral direction X and connecting the portions 94a and 94b. have. Since the absorbent body 4 extends from the front surface portion 11 to the rear surface portion 13 through the intermediate portion 12, the absorbent body 4 is pressed against the wearer's skin side by the contraction force of the elastic members 91, 92, 93, 94. Leakage of the liquid excrement of the wearer is prevented.

  The diaper 1 is worn so that the top sheet 2 and the cover sheet 6 are positioned on the inner side (the wearer's skin side) and the back sheet 3 is positioned on the outer side (the wearer's clothing side). However, it is not necessary for the wearer to wear clothes. The liquid excrement of the wearer penetrates the absorbent body 4 through the top sheet 2 exposed from the opening 61 of the cover sheet 6 and is absorbed and held by the absorbent body 4. Leakage of the liquid excretion absorbed and held by the absorber 4 is prevented by the back sheet 3 and the leak-proof sheet 6. Examples of liquid excreta to be absorbed include urine, menstrual blood, and fallen products, but are usually mainly urine.

  In the diaper 1, since the herbal medicine material layer 5 is formed on the top sheet 2, the herbal medicine material easily reaches the wearer's skin. Therefore, the diaper 1 can exhibit the effect (for example, skin care function etc.) of the Chinese medicine material with respect to a wearer's skin. This effect can be maintained even after the diaper 1 is supplied with the liquid excrement of the wearer. That is, since the liquid excrement of the wearer supplied to the diaper 1 quickly passes through the top sheet 2 and moves to the absorbent body 4, the herbal medicine material layer 5 formed on the top sheet 2 and the liquid excrement The contact state does not continue. Therefore, the diaper 1 can prevent a decrease in the efficacy of the traditional Chinese medicine material due to the continuation of the contact state with the liquid excrement.

  The diaper 1 can be manufactured according to a conventional method, and an adhesive such as a hot-melt adhesive can be used for bonding the sheet members.

Various changes can be made in the diaper 1. Hereinafter, a modified example of the diaper 1 will be described.
<Modification A>
In the modified example A, a liquid-permeable second sheet is disposed between the top sheet 2 and the absorber 4. Thereby, since the position of the absorber 4 in which a liquid excrement of a wearer is absorbed and held can be moved away from the top sheet 2 positioned on the skin side surface of the diaper 1 to the back sheet 3 side, It is possible to prevent contact between the liquid excretion to be absorbed and retained and the herbal medicine material layer 5, and a decrease in the efficacy of the herbal medicine material resulting therefrom.

  The second sheet is a liquid-permeable sheet that allows the liquid excrement of the wearer to pass through. Examples of the liquid permeable sheet include a nonwoven fabric, a woven fabric, a synthetic resin film in which liquid permeable holes are formed, a net-like sheet having a mesh, and the material, thickness, basis weight, density, etc. are liquid of the wearer. It can adjust suitably in the range which excrement can permeate | transmit.

  The second sheet is preferably an air-through nonwoven fabric. The air-through nonwoven fabric is preferable in that it has a thickness sufficient to move the absorber 4 away from the top sheet 2 toward the back sheet 3.

<Modification B>
In the modified example B, a herbal medicine material layer is formed on a sheet member provided on the skin side surface other than the top sheet 2. Thereby, since the location which can form a traditional Chinese medicine material layer increases, the function of a traditional Chinese medicine material layer can be strengthened and diversified. The Chinese medicine material layer formed on the sheet member can have the same configuration as the Chinese medicine material layer 5 formed on the top sheet 2.

  Examples of the sheet member provided on the skin side surface other than the top sheet 2 include a cover sheet 6 and leak-proof cuffs 7a and 7b.

  The herbal medicine material layer may be formed on either the skin-side surface or the surface opposite to the skin-side surface among the sheet members provided on the skin-side surface other than the top sheet 2, but the surface opposite to the skin-side surface. It is preferable to be formed. Thereby, peeling from the sheet | seat member of the Chinese medicine material layer resulting from friction with the skin of the wearer of the diaper 1 and a Chinese medicine material layer can be prevented. Therefore, compared with the case where the traditional Chinese medicine material layer is formed on the skin side surface of the sheet member, the amount of the traditional Chinese medicine material layer required for maintaining the efficacy of the traditional Chinese medicine material can be reduced.

[Production Example 1]
A Chinese medicine ink containing 25% by weight of herbal medicine materials (red ginseng extract, cinnamon extract, peony extract and kakkon extract), 10% by weight of carboxymethylcellulose, 5% by weight of water, and 60% of styrene butadiene copolymer was prepared. . At this time, ultrasonic treatment was performed to dissolve carboxymethylcellulose in water.

Gravure printing Chinese medicine ink on the surface opposite to the skin side surface of the top sheet of the disposable disposable diaper (Mammy Poko Pants made by Unicharm) with a basis weight of 23 g / m ² (Coating) The basis weight was 2.0 g / m ² ), and a herbal medicine material layer was formed in a dot-like pattern on the substantially entire surface of the top sheet. At this time, the diameter of one dot was set to 2 mm, the pitch between dots was set to 3 mm in both the vertical direction and the horizontal direction, and the dots were arranged in a staggered manner.

[Test Example 1]
The disposable diaper manufactured in Production Example 1 as “Example Product” and the commercially available disposable paper diaper that does not have a herbal medicine material layer as “Comparative Example Product” were absorbed into artificial urine (seconds) and rewet amount (g). Was measured.

The method for producing artificial urine is as follows.
<Production of artificial urine>
(1) Weigh the following chemicals.
・ Urea 400g
・ 160g sodium chloride
・ Magnesium sulfate (7 hydrate) 16g
・ Calcium chloride (dihydrate) 6g
(2) Accumulate 10 L of tap water in a plastic tank.
(3) Put 1500 mL of tap water in a 2 L beaker.
(4) Put 400 g of urea in the beaker of (3) and stir until dissolved.
(5) Put the contents of the beaker of (4) into the plastic tank.
(6) Add 1000 mL of tap water to the beaker emptied in (5).
(7) Put 160 g of sodium chloride into the beaker of (6) and stir until dissolved.
(8) Put the contents of the beaker of (7) into the plastic tank.
(9) Put 500 mL of tap water into the beaker emptied in (8).
(10) 16 g of magnesium sulfate (7 hydrate) is placed in the beaker of (9) and stirred until dissolved.
(11) The contents of the beaker of (10) are placed in the plastic tank.
(12) Put 500 mL of tap water into the beaker emptied in (11).
(13) Put 6 g of calcium chloride (dihydrate) in the beaker of (12), and stir until dissolved (sufficiently stir because calcium chloride is difficult to dissolve in water).
(14) The contents of the beaker of (13) are placed in the plastic tank.
(15) Put tap water to the 20L mark position of the above-mentioned poly tank.
(16) Stir the solution in the plastic tank for 1 minute to confirm that there is no precipitate.
(17) Add 1 tablespoon of Blue No. 1 to the solution in the plastic tank.
(18) Stir the solution in the plastic tank for 1 minute.

The measuring method of the absorption rate and the rewet amount is as follows.
<Measurement of absorption rate and rewet amount>
(1) Mark the artificial urine dropping position of the sample.
(2) Measure the weight of the sample and the thickness of the artificial urine dropping position. A thickness meter (PEACOCK PIALTHICKNESS GAUGE, diameter 50 mm) is used for measuring the thickness.
(3) Fix the sample.
(4) The burette is fixed at a position 10 mm above the artificial urine dropping position.
(5) Remove the burette and place a cylinder (diameter 60 mm, weight 200 g) on the sample so that the artificial urine dropping position mark is in the center.
(6) The burette is returned to the artificial urine dropping position (center of the cylinder), and the first artificial urine dropping is started (T = 0), and simultaneously, the measurement of the absorption rate (seconds) is started.
(7) 80 mL of artificial urine is dropped at 8 mL / second.
(8) In the cylinder, the time (seconds) until the artificial urine disappears from the top sheet surface is measured, and this is defined as “absorption rate 1 (second)”.
(9) The weight (g) of the filter paper (Advantech No. 2,100 mm × 100 mm) is measured, and this is designated as “weight A (g)”.
(10) Five minutes after the start of artificial urine dropping (T = 5 minutes), weigh the filter paper (Advantech No. 2,100 mm × 100 mm) so that the center of the filter paper coincides with the artificial urine dropping position. Installed on top and a weight (3.5 kg / 100 cm ² ) on it.
(11) Eight minutes after the start of artificial urine dripping (T = 8 minutes) (three minutes after the weight was installed), the weight was removed, and the weight (g) of the filter paper was measured. ) ”.
(12) The amount of change in the weight of the filter paper (weight B (g) −weight A (g)) is calculated, and this is defined as “rewetting amount 1 (g)”.
(13) The second artificial urine dripping is started 10 minutes after the start of the first artificial urine dripping (T = 10 minutes), and simultaneously the measurement of the absorption rate (seconds) is started.
(14) 80 mL of artificial urine is dropped at 8 mL / second.
(15) In the same manner as in the above (8) to (12), in the cylinder, the time (seconds) until the artificial urine disappears from the top sheet surface is measured, and this is defined as “absorption rate 2 (seconds)”. The amount of change (g) in the weight of the filter paper is calculated, and this is defined as “rewetting amount 2 (g)”.
(16) Ten minutes after the start of the second artificial urine dripping (T = 20 minutes), the third artificial urine dripping is started, and at the same time, the measurement of the absorption rate (seconds) is started.
(17) 80 mL of artificial urine is dropped at 8 mL / second.
(18) In the same manner as in the above (8) to (12), in the cylinder, the time (seconds) until the artificial urine disappears from the top sheet surface is measured, and this is set as “absorption rate 3 (seconds)”. The amount of change (g) in the weight of the filter paper is calculated, and this is defined as “rewetting amount 3 (g)”.
(19) The measurement of the absorption speeds 1 to 3 and the rewet amounts 1 to 3 is repeated 5 times, and the average value is calculated.

  Table 1 shows the measurement results of the absorption rate (seconds) and the rewet amount (g).

As shown in Table 1, the absorption rate of the example product was not inferior to the absorption rate of the comparative product. This result shows that when the artificial urine passes through the top sheet, the herbal medicine material layer formed on the top sheet is less likely to be a barrier, and the reduction of the liquid absorption rate is prevented.
Moreover, as shown in Table 1, the rewet amount of the example product was significantly smaller than the rewet amount of the comparative example product. This result shows that the traditional Chinese medicine material layer formed on the top sheet has an anti-rewetting action.

1 Disposable diaper (absorbent article)
2 Top sheet 3 Back sheet 4 Absorber 5 Herbal medicine material layer

Claims (10)

An absorbent article comprising a liquid permeable top sheet provided on the skin side surface, a liquid impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet,
The said absorbent article with which the Chinese medicine material layer containing an amphiphile as a binder is pattern-printed in the arrangement | positioning area | region of the said absorber of the said top sheet. The absorbent article according to claim 1, wherein the Chinese medicine material layer is pattern-printed on a surface of the top sheet opposite to the skin side surface.   The absorbent article according to claim 1 or 2, wherein the amphiphilic substance is a cellulosic polymer.   The absorptive article according to claim 3 in which said cellulosic polymer is carboxymethylcellulose. The absorptive article according to any one of claims 1 to 4 in which said Chinese medicine material layer is pattern printed in the shape of a dot . The absorptive article according to any one of claims 1 to 5 in which said top sheet is a point bond nonwoven fabric, a spun bond nonwoven fabric, or an SMS nonwoven fabric . The absorbent article according to any one of claims 1 to 6 , wherein a liquid-permeable second sheet is disposed between the top sheet and the absorber. The absorbent article according to claim 7 , wherein the second sheet is an air-through nonwoven fabric . The said absorbent article has a sheet | seat member provided in the skin side surface other than a top sheet, The Chinese medicine material layer is pattern-printed on the said sheet | seat member, The any one of Claims 1-8. Absorbent articles. The absorptive article according to claim 9 by which a traditional Chinese medicine material layer is pattern-printed on the surface opposite to the skin side surface among the sheet members .

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