JP2002285021A - Water absorbent composition, its manufacturing method, absorptive article and absorbent - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a granular water absorbent composition which colors little, is highly safe and imparts excellent deodoring performance and absorption characteristic to an absorptive article such as a diaper when incorporated therein, its manufacturing method and an absorptive article using it. SOLUTION: This composition contains vegetable powder and an absorbent resin of which the external part and/or its vicinity is surface treated with a crosslinking agent and has a malodor elimination index expressed in the following formula of 180 or more: malodor elimination index=1.1×hydrogen sulfide elimination rate+2.0× methyl mercaptane elimination rate+0.3×ammonia elimination rate.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a particulate water-absorbing agent composition, and an absorbent article and an absorbent body using the particulate water-absorbing agent composition. A particulate water-absorbing agent composition, absorbent article, which can impart particularly excellent deodorizing performance and excellent absorption characteristics when used in an absorbent body of a sanitary material such as a pad, and gel stability;
And an absorber.

[0002]

2. Description of the Related Art In recent years, water-absorbent resins have been widely used as one of constituent materials of sanitary materials such as disposable diapers, sanitary napkins, incontinence pads and the like for the purpose of absorbing body fluids. Examples of the water-absorbing resin include a crosslinked product of a partially neutralized polyacrylic acid, a hydrolyzate of a starch-acrylonitrile graft polymer, a neutralized product of a starch-acrylic acid graft polymer, and vinyl acetate-acrylate copolymer. Merged saponified product, crosslinked carboxymethylcellulose, hydrolyzate of acrylonitrile copolymer or acrylamide copolymer or crosslinked product thereof, crosslinked product of cationic monomer, crosslinked isobutylene-maleic acid copolymer, 2
A crosslinked product of acrylamide-2-methylpropanesulfonic acid and acrylic acid is known.

[0003] Conventionally, the water absorption properties desired for the above-mentioned water-absorbent resin include a high absorption capacity when contacted with an aqueous liquid such as a body fluid, an excellent absorption rate, a liquid permeability, a gel strength of a swollen gel,
An amount of suction for sucking water from a base material containing an aqueous liquid is proposed. In addition to these, various attempts have been conventionally made to add deodorant and antibacterial compounds to the water-absorbing resin to give the resin an additional function. Deodorizing the absorbent article is one of the desired performance of, has been studied in order to improve the deodorizing performance of the absorbent resin. As a method for imparting deodorant performance, JP-A-59-105448 discloses a method of containing activated carbon, and JP-A-60-158.
No. 861 discloses a method of containing a leaf extract of a Camellia plant, Japanese Patent Application Laid-Open No. 11-241030 discloses a method of including an extract of a coniferous tree, and Japanese Patent Application Laid-Open No. 2-41155 discloses a method of including tea-making. JP-A-11-11682
No. 9 proposes a method of including tannic acid and a composite silicate compound.

However, Japanese Patent Application Laid-Open No. Sho 59-105448 discloses
In the method of containing activated carbon disclosed in Japanese Patent Application Publication No. H06-187, the deodorizing effect is exhibited by the adsorption of malodorous components by activated carbon. There is a problem in that the absorbent article is inactivated by use until it absorbs urine. Further, when activated carbon is used, there is a big problem that the diaper is colored black. According to the method of containing a leaf extract of a Camellia plant disclosed in Japanese Patent Application Laid-Open No. 60-158861, the problem of coloring is improved, but the effect in practical use is low. In addition, production costs are high due to extraction from the leaves of the plant.

In the method of containing a coniferous tree extract described in Japanese Patent Application Laid-Open No. H11-241030, essential oils such as a tree extract have a strong odor peculiar to themselves, and in actual use, for example, the odor of urine cannot be discriminated. Deodorizing effect is high. In this case, the deodorizing effect is mainly an effect of masking the odor. The deodorant in masking has its own peculiar smell. And since there is an individual difference in taste of smell, it is not suitable as a consumable for many people. In addition, the production cost of essential oils is high. Japanese Patent Application Laid-Open No. H11-116829 discloses a method of containing tannic acid and a complex silicate compound, which has an effect of removing specific malodorous substances, but has no effect on malodor contained in actual body fluids such as urine. There is no such effect, and the deodorizing effect of actual use in absorbent articles is not sufficient.

[0006] In the method of incorporating tea making disclosed in Japanese Patent Application Laid-Open No. 2-41155, the tea making itself has a good deodorizing effect. The effect was not yet enough. In addition, for use in absorbent articles and the like, it is always desired to impart deodorant performance with high safety.

[0007]

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide excellent deodorizing performance and excellent absorption characteristics when incorporated into absorbent articles such as diapers, which have low coloring and high safety. An object of the present invention is to provide a particulate water-absorbing agent composition, a method for producing the same, an absorbent article, and an absorbent body.

[0008]

Means for Solving the Problems The present inventors have made intensive studies from the viewpoint of excellent deodorizing performance and excellent absorption characteristics when a water absorbing agent is incorporated into an absorbent article such as a diaper. As a result, combining the water-absorbent resin having specific physical properties and plant powder, by applying a specific performance, we found that the above object can be attained, thereby completing the present invention.
That is, the particulate water-absorbing composition of the present invention comprises a plant powder,
The surface portion and / or the vicinity thereof contains a water-absorbing resin surface-treated with a crosslinking agent, and has an odor removal index represented by the following formula of 180 or more.

Odor removal index = 1.1 × hydrogen sulfide removal rate +
2.0 × Methylmercaptan removal rate + 0.3 × Ammonia removal rate In the particulate water-absorbing agent composition of the present invention, preferably, the plant powder is a vascular plant powder, or the plant powder is a spice. Yes, or the plant powder is tea leaves and / or tea leaf extract residue. The particulate water-absorbing agent composition of the present invention preferably has a water-absorbing resin solid content of 100%.
The amount of the plant powder is in the range of 0.001 to 20 parts by weight with respect to parts by weight. The particulate water-absorbing agent composition of the present invention preferably has an absorption capacity of 25 g / g or more and 60 g / g or less, a suction index under pressure of 14 g / g or more, and an absorption rate of 60 seconds or less.

Further, another particulate water-absorbing composition of the present invention contains a plant powder and a water-absorbing resin, and has an absorption capacity of 25 g.
/ G or more and 60 g / g or less, suction index under pressure is 14 g / g.
As described above, the absorption rate is 60 seconds or less, and the offensive odor removal index represented by the following formula is 180 or more. Odor removal index = 1.1 x hydrogen sulfide removal rate + 2.0 x methyl mercaptan removal rate + 0.3 x ammonia removal rate The particulate water absorbing agent composition of the present invention is preferably used for sanitary materials. The method for producing the particulate water-absorbing agent composition of the present invention comprises the steps of: adding a plant powder to a water-absorbent resin having an absorption capacity of 25 g / g or more and 60 g / g or less, a suction force under pressure of 9 g / g or more, and an absorption rate of 60 seconds or less. It is characterized by being added.

The absorbent article of the present invention includes an absorbent layer containing the particulate water-absorbing agent composition of the present invention, a liquid-permeable top sheet, and a liquid-impermeable back sheet. The absorbent of the present invention is an absorbent containing a hydrophilic fiber, a plant powder, and a water-absorbent resin, and as a particulate water-absorbent composition obtained by mixing the plant powder and the water-absorbent resin, represented by the following formula: The odor removal index is 180 or more. Odor removal index = 1.1 × removal rate of hydrogen sulfide + 2.0 × removal rate of methyl mercaptan + 0.3 × ammonia removal rate Water-absorbing composition.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
In the present invention, when referred to as a water-absorbent resin, it refers to a polymer in which only the inside is crosslinked, and when referred to as a surface-crosslinked water-absorbent resin, refers to a polymer in which the inside and the surface are crosslinked. However, depending on the prior literature, the latter may be simply referred to as a water-absorbent resin, and the former may be referred to as a water-absorbent resin precursor. As the water absorbent resin in the present invention, preferably,
The surface portion and / or the vicinity thereof is surface-treated with a crosslinking agent, that is, the surface portion and / or the vicinity thereof is crosslinked with a crosslinking agent capable of reacting with a functional group of the water-absorbent resin, and / or , Absorption capacity 25g
/ G or more and 60 g / g or less, a suction force under pressure of 9 g / g or more, and an absorption speed of 60 seconds or less are used.

As for the absorption characteristics of the water-absorbent resin, the absorption capacity is 25 g / g or more and 60 g / g or less, and the suction force under pressure is 9 g / g.
When the water-absorbent resin and the plant powder satisfying all the absorption characteristics of g / g or more and the absorption rate of 60 seconds or less are combined, the effect of imparting the deodorizing performance to the whole diaper is large, which is preferable. The cause is not clear,
When combined with a plant powder limited to a water-absorbent resin having a specific absorption capacity, suction power under pressure, and absorption speed, an optimal balance between the action of the plant powder when contacted with urine and its liquid absorption is achieved. It is thought that it is. The water-absorbing resin having a surface portion and / or the vicinity thereof surface-crosslinked with a crosslinking agent used in the present invention is generally obtained by a production method in which the water-absorbing resin is subjected to a surface crosslinking treatment.

In the present invention, the water-absorbing resin is a water-swellable / water-insoluble crosslinked polymer, which absorbs water to form a water-insoluble hydrogel of anionic, nonionic, cationic or a mixture thereof. It is a crosslinked polymer. In the present invention, the particulate water-absorbing agent composition means a water-absorbing resin as a main component, preferably 70% by weight or more, and more preferably 80% by weight or more.
It is a material that contains water by weight or more and absorbs water.
In addition, water swelling refers to absorbing a large amount of water in ion-exchanged water twice or more, preferably 10 to 3000 times, more preferably 50 to 2000 times with respect to its own weight solid content. Is 50% by weight or less, preferably 25% by weight or less, more preferably 20% by weight or less, further preferably 15% by weight or less, particularly preferably 10% by weight or less of the water-soluble component in the water-absorbent resin. Points to

The method for measuring water-soluble components is described in EUROPEAN.
DISPOSABLES ANDNONWOVENS
ASSOCIATION's EDANA RECOMM
ENDED TEST METHODS 470,1-
It is described in 99 extractables. Such water-absorbent resins, partially neutralized polyacrylic acid crosslinked starch - hydrolysates of acrylonitrile graft polymer, starch - neutralized product of acrylic acid graft polymer,
Saponified vinyl acetate-acrylate copolymer,
Examples include a hydrolyzate of an acrylonitrile copolymer or an acrylamide copolymer, or a cross-linked product thereof, a carboxyl group-containing cross-linked polyvinyl alcohol modified product, a cross-linked isobutylene-maleic anhydride copolymer, or a mixture thereof.

These water-absorbing resins may be used alone or as a mixture. Among them, one having a carboxyl group or a mixture thereof is preferable. Typically, acrylic acid and / or a salt thereof (neutralized product) is used. It is preferable that a polymer (water-swellable polyacrylic acid (salt) crosslinked polymer) obtained by polymerizing and crosslinking a monomer as a main component is used as a main component. These water-absorbing resins may be hydrogels containing water, or may be dried if necessary, and may be powders obtained by ordinary pulverization before and / or after drying. The above-mentioned water-absorbing resin may be, for example, an unsaturated carboxylic acid such as (meth) acrylic acid, maleic acid, maleic anhydride, fumaric acid, crotonic acid, itaconic acid, β-acryloyloxypropionic acid, or a neutralized product thereof. After polymerizing or copolymerizing at least one selected monomer,
The polymer can be obtained by performing operations such as pulverization and classification on the polymer as necessary to adjust the particle size.

The neutralization ratio of the acid group is preferably 30 to 1
The amount is adjusted to be in the range of 00 mol%, more preferably 60 to 90 mol%, and still more preferably 65 to 75 mol%.
Neutralization of the acid group may be performed as an acid group-containing monomer in an aqueous solution before polymerization, may be performed by neutralization after an aqueous solution of the polymer, that is, a polymer gel, or both may be used in combination. You may. Examples of the neutralizing salts, sodium, lithium, potassium, ammonia, and amines preferred. As the monomer, (meth) acrylic acid and neutralized products thereof are more preferable among the above-mentioned monomers. The weight average particle size is preferably in the range of 100 μm to 600 μm, more preferably in the range of 200 to 500 μm, and the particle size is 106 μm.
The proportion of particles having a particle size of less than m is 10% by weight or less, preferably 5% by weight or less, more preferably 3% by weight or less.

Further, the water-absorbing resin may be a copolymer of the above monomer with another monomer copolymerizable with the above monomer. Specific examples of the other monomer include vinyl sulfonic acid, styrene sulfonic acid, 2- (meth) acrylamido-2-methylpropane sulfonic acid, 2- (meth) acryloyl ethane sulfonic acid, and 2- (meth) acryloylethanesulfonic acid. Anionic unsaturated monomers such as (meth) acryloylpropanesulfonic acid and salts thereof; acrylamide, methacrylamide, N-ethyl (meth) acrylamide, Nn-propyl (meth)
Acrylamide, N-isopropyl (meth) acrylamide, N, N-dimethyl (meth) acrylamide, 2-
Hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, methoxypolyethylene glycol (meth) acrylate, polyethylene glycol mono (meth) acrylate, vinylpyridine, N
-Vinylpyrrolidone, N-acryloylpiperidine, N
- cationic unsaturated monomers such as acryloyl pyrrolidine; N, N-dimethylaminoethyl (meth)
Acrylate, N, N-diethylaminoethyl (meth)
Examples include cationically unsaturated monomers such as acrylate, N, N-dimethylaminopropyl (meth) acrylate, N, N-dimethylaminopropyl (meth) acrylamide, and quaternary salts thereof.

The water-absorbing resin includes a plurality of polymerizable unsaturated groups,
It is preferable that the inside thereof is crosslinked by reacting or copolymerizing with a crosslinking agent having a plurality of reactive groups. Further, the water-absorbing resin may be a self-crosslinking type that does not require a crosslinking agent. Specific examples of the crosslinking agent (also referred to as an internal crosslinking agent) include, for example, N, N′-methylenebis (meth) acrylamide, (poly) ethylene glycol di (meth) acrylate, (poly) propylene glycol di ( (Meth) acrylate, trimethylolpropane di (meth) acrylate, trimethylolpropane tri (meth) acrylate, glycerin tri (meth) acrylate, glycerin acrylate methacrylate,
Ethylene oxide-modified trimethylolpropane tri (meth) acrylate, pentaerythritol tetra (meth) acrylate, dipentaerythritol hexa (meth) acrylate, triallyl cyanurate, triallyl isocyanurate, triallyl phosphate, triallylamine, poly (meth) ali Roxyalkane, (poly) ethylene glycol diglycidyl ether, glycerol diglycidyl ether, ethylene glycol, polyethylene glycol, propylene glycol, glycerin, pentaerythritol, ethylenediamine, polyethyleneimine, glycidyl (meth) acrylate, and the like. These crosslinking agents may be used alone or as a mixture of two or more. Among the listed compounds, it is more preferable to use a compound having a plurality of polymerizable unsaturated groups as the crosslinking agent.

The amount of the crosslinking agent used is preferably in the range of 0.01 mol% to 2 mol% based on the total amount of the above monomers,
More preferably, it is in the range of 0.03 mol% to 0.2 mol%. When the use amount of the crosslinking agent is less than 0.01 mol%, the surface crosslinking treatment described below is performed to reduce the suction force under pressure to 9%.
Care must be taken because it may be difficult to obtain characteristics of g / g or more. At the start of the polymerization, radical polymerization of, for example, potassium persulfate, ammonium persulfate, sodium persulfate, t-butyl hydroperoxide, hydrogen peroxide, 2,2′-azobis (2-amidinopropane) dihydrochloride, etc. An initiator or an active energy ray such as an ultraviolet ray or an electron beam can be used. When an oxidizing radical polymerization initiator is used, for example, redox polymerization may be performed using a reducing agent such as sodium sulfite, sodium hydrogen sulfite, ferrous sulfate, or L-ascorbic acid. The amount of the polymerization initiator used is 0.001 mol%.
Is preferably in the range of 0.01 to 2 mol%, more preferably 0.01 to 0.2 mol%.
More preferably, it is in the range of 5 mol%.

It is also preferable to increase the specific surface area by adding a foaming agent such as a carbonate or an azo compound, an inert gas, or the like to the monomer at the time of polymerization, and forming the resulting water-absorbent resin into a porous structure. In addition, examples of the process for producing the water-absorbent resin in the present invention include, for example, in the case of aqueous solution polymerization, a series of steps of preparation of an aqueous monomer solution, polymerization, granulation of a polymer, drying, pulverization, and classification. In the case of the above aqueous polymerization, an aqueous monomer solution of generally 10% by weight to a saturated concentration, preferably 20 to 60% by weight is prepared and then polymerized. Examples of the polymerization method include a method of performing polymerization in a double bowl type kneader while stirring as necessary, a method of performing cast polymerization in a container, a method of (continuously) standing polymerization on a driven belt, and the like. .

In order to dry the polymer (hydrogel) obtained in the above-mentioned polymerization step, it is desirable that the hydrogel is reduced to a predetermined particle size. The granulation of the hydrous gel can be performed at the time of polymerization by performing polymerization while stirring with a twin bowl type kneader or the like, or by extruding the gel after polymerization from a die using a meat chopper or the like. It can also be made finer by a cutting mill or the like. The particle size of the finely divided gel can be set as appropriate depending on the capacity of the dryer and the like.
The range of mm is preferred. If the gel is finer than 0.1 mm, the obtained water-absorbent resin may have low physical properties. If it is larger than 10 mm, drying may be difficult.

In the granulation step, coarse gels larger than 10 mm and fine gels smaller than 0.1 mm can be formed. These polymers can be taken out and added to, for example, an aqueous monomer solution or a polymer gel. Comminuted gel above comminution step is dried in the drying step. As a drying method, for example, a hot air dryer, a flash dryer, an azeotropic dehydration, a fluidized bed dryer, a drum dryer, a microwave, a far infrared ray, and the like can be used. The drying temperature is preferably 80C or higher, more preferably 120C or higher, more preferably in the range of 150 to 250C, and still more preferably in the range of 160 to 220C.

The water-absorbent resin may be granulated in a predetermined shape, or may be in various shapes such as a spherical shape, a scale-like shape, an irregular crushed shape, and a granular shape. Further, the water-absorbing resin may be substantially ungranulated primary particles.
Granules of secondary particles may be used. In general, the above-mentioned water-absorbent resin does not satisfy the range of the present invention in its absorption capacity, suction force under pressure and water absorption rate. For this reason, it is necessary to further increase the crosslink density near the surface of the water-absorbent resin by using a crosslinker. That is, by crosslinking the vicinity of the surface of the water-absorbent resin using the crosslinking agent, a water-absorbent resin usable in the present invention can be obtained.

[0025] In the present invention, using these water-absorbent resin, the surface portion and / or the vicinity thereof cross-linked water-absorbent resin, and / or absorbency 25 g / g or more 60 g / g or less, under pressure A water-absorbing resin having a suction force of 9 g / g or more and a water absorption speed of 60 seconds or less can be obtained.
That is, the water-absorbent resin according to the present invention is preferably the above-mentioned aqueous solution polymerization or water-absorbent resin obtained by reversed phase suspension polymerization, preferably obtained by aqueous solution polymerization water-absorbent resin, i.e., the weight average particle diameter 100μm~600μm
Range, more preferably a weight average particle size of 200μm of
Adjusted by an operation such as polymerization or classification so that the proportion of particles having a particle size of less than 106 μm is within a range of from 500 μm to 10% by weight, preferably 5% by weight or less, more preferably 3% by weight or less. were those obtained, crosslinking agent capable of reacting with the functional group of the water-absorbing resin (hereinafter referred to as surface cross-linking agent) can be obtained by heating treatment in the presence of.

The above surface cross-linking agent has a functional group of the water-absorbing resin, for example, a functional group capable of reacting with an acidic group. If the functional group of the water-absorbing resin is, for example, carboxyl group, ethylene glycol, diethylene glycol, propylene glycol, triethylene glycol, tetraethylene glycol, polyethylene glycol, 1,3-propanediol, dipropylene glycol, 2,2, 4-trimethyl-1,3-pentadiol, polypropylene glycol, glycerin, polyglycerin, 2-butene-1,4-diol, 1,4-
Butanediol, 1,5-pentanediol, 1,6-
Polyhydric alcohols such as hexanediol, 1,2-cyclohexanedimethanol, 1,2-cyclohexanol, trimethylolpropane, diethanolamine, triethanolamine, polyoxypropylene, oxyethyleneoxypropylene block copolymer, pentaerythritol and sorbitol Compounds: ethylene glycol diglycidyl ether, polyethylene glycol diglycidyl ether, glycerol polyglycidyl ether,
Epoxy compounds such as diglycerol polyglycidyl ether, polyglycerol polyglycidyl ether, propylene glycol diglycidyl ether, polypropylene glycol diglycidyl ether, and glycidol; ethylenediamine, diethylenetriamine, triethylenetetramine, tetraethylenepentamine, pentaethylenehexamine, polyallylamine, Polyvalent amine compounds such as polyethyleneimine; polyvalent isocyanate compounds such as 2,4-tolylene diisocyanate and hexamethylene diisocyanate; polyvalent oxazoline compounds such as 1,2-ethylenebisoxazoline; 1,3-dioxolane-2
-One, 4-methyl-1,3-dioxolan-2-one, 4,5-dimethyl-1,3-dioxolan-2-one, 4,4-dimethyl-1,3-dioxolan-2-one, - ethyl-1,3-dioxolan-2-one, 4
-Hydroxymethyl-1,3-dioxolan-2-one, 1,3-dioxan-2-one, 4-methyl-1,
3-dioxan-2-one, 4,6-dimethyl-1,3
- dioxan-2-one, 1,3-Jiokisopan 2-
Alkylene carbonate compounds such as on; mono, di, and poly oxazolidine compounds; haloepoxy compounds such as epichlorohydrin, epibromohydrin, α-methyl epichlorohydrin; zinc, calcium, magnesium,
Polyvalent metal compounds such as hydroxides and chlorides such as aluminum, iron and zirconium; silane coupling agents such as γ-glycidoxypropyltrimethoxysilane and γ-aminopropyltriethoxysilane; polyamide polyamine epihalohydrin resins; One or more selected from the above can be exemplified. Preferably, it contains at least one selected from a polyhydric alcohol compound, a polyvalent amine compound, a polyvalent epoxy compound, and an alkylene carbonate compound.

The amount of the surface cross-linking agent used depends on the compound to be used, the combination thereof, and the like.
The amount is preferably in the range of 0.001 to 5 parts by weight, more preferably 0.01 to 1 part by weight, based on 00 parts by weight. By using the above surface crosslinking agent,
The crosslink density in the vicinity of the surface of the water-absorbent resin can be made higher than that inside, and the resin having the absorption characteristics required for the resin of the present invention can be obtained. If the amount of the surface cross-linking agent exceeds 10 parts by weight, not only will it be uneconomical, but also the amount of the surface cross-linking agent will be excessive in forming the optimum cross-linked structure in the water-absorbing resin. but there is a case in reduced undesirable. If the amount of the surface cross-linking agent is less than 0.001 part by weight, it may be difficult to improve the suction force under pressure of the water-absorbent resin.

When mixing the water-absorbing resin and the surface crosslinking agent, it is preferable to use water as a solvent. The amount of water used depends on the type and particle size of the water-absorbing resin, but is preferably more than 0 and 20 parts by weight or less, preferably 0.1 part by weight or less, based on 100 parts by weight of the solid content of the water-absorbing resin. More preferably, it is in the range of 10 parts by weight. Further, in mixing the water-absorbent resin and the surface-crosslinking agent, it may optionally be used a hydrophilic organic solvent as a solvent. Examples of the hydrophilic organic solvent include lower alcohols such as methyl alcohol, ethyl alcohol, n-propyl alcohol, isopropyl alcohol, n-butyl alcohol, isobutyl alcohol, t-butyl alcohol; ketones such as acetone; dioxane , And ethers such as tetrahydrofuran; N, N-
Examples include amides such as dimethylformamide; sulfoxides such as dimethyl sulfoxide. The amount of the hydrophilic organic solvent varies depending on the type or particle diameters absorbent resin,
It is preferably at most 20 parts by weight, more preferably at most 10 parts by weight, based on 100 parts by weight of the solid content of the water-absorbent resin.

When mixing the water-absorbing resin and the surface cross-linking agent, for example, after dispersing the water-absorbing resin in the above-mentioned hydrophilic organic solvent, the surface cross-linking agent may be mixed. It is not particularly limited. Among various mixing methods, a method in which a surface cross-linking agent dissolved in water and / or a hydrophilic organic solvent, if necessary, is directly sprayed or dropped on the water-absorbing resin and mixed. When mixing with water, fine particles insoluble in water, a surfactant, or the like may be allowed to coexist. The mixing device used when mixing the water-absorbent resin and the surface cross-linking agent preferably has a large mixing force in order to uniformly and surely mix the two. Examples of the above mixing device include a cylindrical mixer, a double-walled conical mixer, a V-shaped mixer, a ribbon-type mixer, a screw-type mixer, a fluid-type rotary desk-type mixer, and a gas-flow-type mixer. Preferred are a double-arm kneader, an internal mixer, a pulverizing kneader, a rotary mixer, a screw extruder, and the like.

The surface portion and / or the vicinity thereof is cross-linked by a water-absorbing resin used in the present invention, that is, a cross-linking agent capable of reacting with a functional group of the water-absorbing resin, and / or has an absorption capacity of 25 g / g or more and 60 g /
g, suction force under pressure of 9 g / g or more, and absorption rate of 60
In order to obtain a water-absorbent resin having a time of less than seconds, it is preferable to perform a heat treatment after mixing the water-absorbent resin and the surface crosslinking agent. The treatment temperature of the above-mentioned heat treatment depends on the surface cross-linking agent used, but is preferably from 40 ° C to 250 ° C, more preferably from 90 ° C to 210 ° C. When the treatment temperature is lower than 40 ° C., a uniform crosslinked structure is not formed, and therefore, a water-absorbent resin having a suction force under pressure falling within the range of the present invention may not be obtained. When the treatment temperature exceeds 250 ° C., the water-absorbent resin may be deteriorated, and the performance of the water-absorbent resin may be reduced, so that caution is required.

The above-mentioned heat treatment can be performed using a usual dryer or heating furnace. Examples of the dryer include a groove-type mixing dryer, a rotary dryer, a desk dryer, a fluidized-bed dryer, an airflow dryer, and an infrared dryer. In order to obtain a water-absorbent resin that can be used in the present invention, it is preferable to control the above-mentioned crosslinking agent, mixing method, heating temperature, treatment time, and the like so that the suction force under pressure becomes 9 g / g or more. The particulate water-absorbing agent composition of the present invention is obtained as described above, and is preferably a water-absorbing resin whose surface portion and / or its vicinity is surface-treated with a crosslinking agent, and / or having an absorption capacity of 25 g / g or more and 60 g / g or more. g or less,
Preferably 27 g / g or more, more preferably 29 g / g
Above, still more preferably, 31 g / g or more, suction force under pressure is 9 g / g or more, preferably 10 g / g or more, more preferably 11 g / g or more, and absorption rate is 60 seconds or less, preferably 55 seconds or less. It is preferably obtained by adding a plant powder to a water-absorbent resin having been subjected to a surface cross-linking treatment for 50 seconds or less.

[0032] The plant powder usable in the present invention, vascular plants (seed plants, ferns), bryophytes, a powder of algae, preferably of vascular plants powder. Plant powder usable in the present invention,
As long as it satisfies the performance of the present invention, it may be obtained by crushing plant slag by-produced in the manufacturing process in the plant processing industry or the food processing industry. A preferred form of the plant powder that can be used in the present invention is a spice. In addition, it is also a preferable embodiment to use tea leaves and / or tea leaf extract residue.

In the present invention, the portion used by the plant used as the plant powder is not particularly limited as long as it satisfies the performance of the present invention. For example, leaves, branches, stem,
It is at least one portion selected from stems, roots, fruits, flowers, seeds, bark, and the like. The size of the plant powder particles that can be used in the present invention is a mesh passing material having an opening of 850 μm, preferably a mesh passing material having an opening of 600 μm, more preferably a mesh passing material having an opening of 500 μm, Even more preferably, the aperture is 300μ.
m mesh passing objects. That is, the plant powder that can be used in the present invention has an odor removal index represented by the following formula of 180 when a particle passing through a mesh having an opening of 850 μm is used for the particulate water-absorbing agent composition, as described below. vegetable powders such that above.

Odor removal index = 1.1 x hydrogen sulfide removal rate +
2.0 × methyl mercaptan removal rate + 0.3 × ammonia removal rate Aspect ratio of plant powder usable in the present invention Is 1 or more and less than 50, more preferably 1 or more and less than 40, and still more preferably 1 or more and less than 30.
The water content of the plant powder that can be used in the present invention is not particularly limited, but is preferably 40% or less, more preferably 30% or less, and still more preferably 20% or less.
It is even more preferably at most 10%.

[0035] When plant powder usable in the present invention is a powder of vascular plants, as its vascular plants, preferably graminaceous, Aceraceae, ebenaceae, Betulaceae, Asteraceae, perilla Family, cedar family, cedar family, rose family, grape family, cypress family, pine family, beech family, crucifer family, legume family, citrus family, cucurbit family, solanaceae family, pepper family,
It is at least one vascular plant selected from the ginger family, camphoraceae, mallow family, and camellia family. Examples of vascular plants of the Poaceae family include rice, sasa, bamboo, corn, and wheat. Examples of vascular plants of the maple family include maple. Examples of the vascular plants of the family Antrodiaceae include Japanese persimmon. Examples of the vascular plants of the birch family include black hornbeam, hazel, birch, alder, and the like. Examples of vascular plants of the Asteraceae family include chrysanthemum, burdock, dandelion, mugwort and the like. The vascular plants of the mint family, for example, Prunella vulgaris, perilla, dead nettle, perilla, such as peppermint, and the like. Examples of vascular plants of the cedar family include cedar, Chinese fir and Chinese cedar. Examples of vascular plants of the Apiaceae family include honeybee, carrot, parsley, and celery. Examples of vascular plants in the family Rosaceae include plums, cherry blossoms, spikelets, roses, apricots, pears, peaches, apples, strawberries, plums, hawthorn, loquat, sharinbai, bokeh, kamatsuka, rowan, yamabuki, and the like. The vascular plants of Vitaceae, e.g., grapes, ivy, include Ampelopsis. Examples of the vascular plants of the cypress family include hinoki, mice, asunaro, juniper, and sawara. Pinus vascular plants include, for example, larch, hemlock, spruce, pine, fir, cedar and the like. Examples of the vascular plant of the beech family include beech, chestnut, larch, mirakashi, arakashi, and urajirogashi. The vascular plants of the family Brassicaceae, for example, radish, rape, and the like. Examples of legume vascular plants include adzuki bean, licorice, broad bean, and soybean. As vascular plants of the Citrus family, for example, tangerines, oranges, grapefruits, pomelo, sunshaw, yuzu, lemon,
Lime and the like. The vascular plants of the Cucurbitaceae family, for example, pumpkin, cucumber, watermelon, loofah, such as bottle gourd, and the like. The vascular plants of the Solanaceae family, for example, eggplant, peppers, green peppers, and tomatoes, and the like. Examples of vascular plants of the family Pepper include pepper. Examples of the vascular plants of the ginger family include ginger. As vascular plants of the camphoraceae, for example, camphor, camphor,
Kuromoji, shiromoji, bay, shirodamo, hamabiwa and the like. As a vascular plant of the mallow family,
For example, hollyhock, mallow, squirrel, hibiscus, canaoi, kenaf and the like can be mentioned. Examples of the vascular plants of the Camellia family include camellia, hisaki, sakaki, and mocktail.

The spices that can be used in the present invention include:
Or used as seed spices plants, fruit, flower buds, leaves, bark, rhizome and dried, or used in the powder, food seasoning, but to act as a condiment. Spices used in foods are numerous, but are produced naturally or by cultivation. As a product made from spices, it refers to spices made by shaping and sizing the raw materials as they are, crushing the raw materials into spice powder, etc., and extracting only the single component contained in the spices And contains various components. The spice which can be preferably used in the present invention is a spice having a deodorant property, and is not particularly limited.
Mustard, cardamom, caraway, cumin, clove, pepper, coriander, saffron, sansho,
Perilla, cinnamon, ginger, cardamom, Zeal, star anise, sage, onion, thyme, turmeric,
Clove, can be dill, pepper, nutmeg, nutmeg, garlic, mint, parsley, basil, paprika, vanilla, fenugreek, fennel, mace, rosemary, bay leaf, laurel, it is exemplified the wasabi and the like. Among these, when used as an absorbent article, from the viewpoint of imparting deodorant without causing discomfort to the wearer, those having deodorant properties without a masking effect are particularly preferably used, and among them, Pepper, sansho, ginger, pepper, parsley and wasabi are particularly preferably used in the present invention.

The shape of these spices varies depending on the intended deodorizing function, but they are powders.
The material is a mesh material having an opening of 850 μm, preferably a material having a mesh size of 600 μm, more preferably a material having a mesh size of 500 μm, and still more preferably a material having a mesh size of 300 μm. Further, the volume average particle diameter is preferably 850 μm or less, more preferably 600 μm or less, further preferably 500 μm or less, and still more preferably 300 μm or less. General liquid spices are not preferable because they have high aromaticity and may give discomfort. The particle diameter is 850 μm
If larger, the action of the active ingredient contained in condiments when in contact with urine becomes insufficient and it is there undesirable if stable deodorant performance can not be granted. Also with respect to the weight average particle diameter of the water-absorbent resin, it volume average particle diameter of spices is small, preferable because excellent deodorizing performance can be imparted.

The water content of the spice which can be used in the present invention is not particularly limited, but is preferably 40% or less, more preferably 30% or less, and further preferably 20% or less.
%, Still more preferably 10% or less. The tea leaves that can be used in the present invention are vascular plants that are processed to be suitable for drinking, such as agarsk tea, ashitaba tea, achachazul tea, aloe tea, ginkgo leaf tea, ukogi tea, and turmeric tea. , Vladimir grass tea, oolong tea, psyllium tea, persimmon leaf tea, licorice tea, chrysanthemum tea, gymnema tea, wolfberry tea, kumazasa tea, gennoshoco tea, black tea, sansazi tea, perilla tea, jasmine tea, sugina tea, senna tea, mulberry Tea, leaf tea, buckwheat tea, tahibo tea, dandelion tea, Chinese tea, iron guanyin tea, tencha, duchu tea, dokudami tea, nazuna tea, nanten tea, basella tea, banaba tea, adlay tea, loquat tea, pual tea, pine leaf tea, barley tea, mugwort tea, green tea, gentian tea, rooibos tea and the like, preferably obtained by working as potable than evergreen shrub and its leaves Theaceae, example If green tea, black tea, oolong tea, and the like.

Typical values of the water content in the above-mentioned tea leaves include values such as 6 to 9 g in 100 g of the tea leaves, but the water content of the tea leaves used in the present invention is not particularly limited, and various water contents may be used. it is possible to use the tea leaves of the amount. As tea leaf extract scum that can be used in the present invention,
Can be exemplified extracted grounds of the tea leaves, it is preferable to use a dried product of tea leaves extracted grounds. In the present invention, the dried tea leaf extract residue is the extract residue after the tea extraction from the above-mentioned tea leaves, which is substantially dry, and has a water content of 40% or less, preferably 30% or less. , Further preferably 20% or less, still more preferably 10% or less.
It is the water content in the above range is preferable in terms of handling of the extraction lees is facilitated.

At present, finely powdered powder produced as a by-product in the tea production process, tea leaves and / or
Alternatively, the tea leaf extract has been discarded and can be preferably used in terms of effective use of resources and price. The shape of the tea leaves and / or tea leaf extract residue is a powder although it varies depending on the intended deodorizing function, and the size of the particles is a mesh passing material having an aperture of 850 μm, preferably an aperture of 850 μm. It is a mesh-passed material having a mesh size of 600 μm, more preferably a mesh-passed material having an opening of 500 μm, and still more preferably a mesh-passed material having an opening of 300 μm. The volume average particle diameter is preferably 500μm or less, more preferably 300μm or less. Volume average particle size 500μ
m, tea leaves and / or urine in contact with urine
Or action of the active ingredient contained in the tea leaves extracted grounds is insufficient, it may be the case where stable deodorant performance can not be granted there undesirable. Also with respect to the weight average particle diameter of the water-absorbent resin, volume average particle size of the tea leaves and / or tea leaves extract scum is small, preferable because excellent deodorizing performance can be imparted.

Absorbent articles such as diapers using a general water-absorbent resin containing such a plant powder may not be able to impart sufficient deodorizing performance to the entire diaper depending on the type of water-absorbent resin, and there is a case to give an unpleasant feeling to. Particulate water-absorbing composition of the present invention is to solve the above problem by specifying the properties of previous water-absorbent resin to mix the plant powder, and excellent deodorizing performance and excellent absorption properties absorbent article It can be applied and is preferably used for absorbent articles. The general water-absorbent resin, although the surface portion and / or near the crosslinking agent capable of reacting with the functional group of the water-absorbent resin has the been improved balance of water absorption properties by being cross-linked, When a water-absorbent resin is used for an absorbent article such as a diaper, the water-absorbent resin may deteriorate with time, resulting in a decrease in liquid permeability, a decrease in gel strength, and a decrease in absorption characteristics. However, the particulate water-absorbing composition of the present invention, which contains plant powder, is surprisingly less deteriorated with time when urine is absorbed, and is a particulate water-absorbing composition excellent in gel stability. excellent and deodorizing performance for a long time, can be excellent absorption characteristics imparted to the absorbent article, preferably used in the absorbent article.

[0042] The amount of the plant powder is for different but the amount added water-absorbent resin solids 100 parts by deodorizing function of interest, preferably in the range of 0.001 to 20 parts by weight, The range is more preferably 0.01 to 10 parts by weight, even more preferably 0.01 to 5 parts by weight. Also, as a method of adding these plant powders,
The plant powder is added to the water-absorbent resin so that a desired amount of the plant powder is added to the water-absorbent resin having a surface portion and / or its vicinity cross-linked by a cross-linking agent capable of reacting with a functional group of the water-absorbent resin. A method of directly mixing (for example, a dry blending method of mixing powders), a method of spraying or dripping water, an aqueous liquid, various organic solvents, and the like with a plant powder directly mixed with a water-absorbing resin, The water,
Those dispersed in an aqueous liquid or various organic solvents, directly to the water-absorbing resin, and a method for spraying or dropping the mixing can be exemplified. Incidentally a method of adding a plant powder during the polymerization of the water-absorbent resin, it is also possible to employ a method of adding a plant powder after polymerization of the gel, the absorption capacity of the present invention in a subsequent step in which case, under pressure It is necessary to perform so as to fall within the range of the suction force and the absorption speed.

Among the above-mentioned methods of adding plant powder, particularly preferred is a method of spraying or dropping water, an aqueous liquid, various organic solvents, or the like with a mixture obtained by directly mixing the plant powder with a water-absorbent resin. A method in which powder is dispersed in water, an aqueous liquid or various organic solvents, etc., is directly sprayed or mixed with the water-absorbent resin, a method in which plant powder is added during polymerization of the water-absorbent resin, This is a method of adding a powder, which is a form in which a plant powder is supported on a water absorbent resin. When mixing the water-absorbent resin and the plant powder in the present invention, the amount of water, steam, or an aqueous liquid composed of water and a hydrophilic organic solvent to be used, if necessary, is optimal depending on the type and particle size of the water-absorbent resin. different, but usually, in the case of water, 100 parts by weight of the solid content of the water-absorbent resin, 10 parts by weight or less, preferably in the range of 1 to 5 parts by weight. Similarly, the amount of the hydrophilic organic solvent used is usually 10 parts by weight or less, preferably 0.1 to 5 parts by weight, based on 100 parts by weight of the solid content of the water absorbent resin.

In the present invention, the apparatus used for mixing the water-absorbent resin with the plant powder may be a conventional apparatus, for example, a cylindrical mixer, a screw mixer, a screw extruder, a turbulizer. , A Nauter mixer, a V mixer, a ribbon mixer, a double-arm kneader, a flow mixer, an air mixer, a rotating disk mixer, a roll mixer, a tumbling mixer, and the like. The speed of mixing can be either high or low. Various inorganic powders may be further added to the above-mentioned water-absorbing resin and / or particulate water-absorbing agent composition. As the inorganic powder, specifically,
Examples include metal oxides such as silicon dioxide and titanium oxide, silicic acids (salts) such as natural zeolites and synthetic zeolites, kaolin, talc, clay, bentonite and the like. Of these, silicon dioxide and silicic acid (salt) are more preferable, an average particle diameter measured by a Coulter counter method 2
Silicon dioxide and silicic acid (salt) of 00 μm or less are more preferred. The amount used depends on the combination of the water-absorbing resin and / or the particulate water-absorbing composition and the inorganic powder, but is preferably 0.001 to 10 parts by weight per 100 parts by weight of the water-absorbing resin and / or the particulate water-absorbing composition. Parts by weight, more preferably 0.01 to
5 parts by weight. The method of mixing the water-absorbent resin and / or the particulate water-absorbing agent composition with the inorganic powder is not particularly limited, and for example, a dry blending method of mixing powders,
Although a wet mixing method or the like can be adopted, a dry blending method is more preferable.

[0045] Incidentally, a plant powder, the difference between the powder obtained by supporting extract the (essential oil) from plants, plant powder holds a component having a deodorizing effect in the fiber, such as urine Is effective in reducing the volatilization and / or outflow of the deodorizing effect component, and works effectively when necessary. In addition, the fibrous portion in the plant is considered to be effective in absorbing the malodorous component.
In addition, the difference between plant powder and powder carrying an extract (essential oil) extracted from plants is that the latter has a strong powder odor intensity and a high deodorizing effect in actual use. This is the effect of masking. For deodorant in masking, which has a distinctive smell of itself, the smell of taste there are individual differences, not suitable.

The odor intensity of the powder is preferably 4 or less, more preferably 3 or less, further preferably 2 or less, and most preferably 1 or less. More of the particulate water-absorbing composition obtained by the production method is a particulate water-absorbing composition comprising a plant powder, the surface portion and / or the vicinity thereof and a surface-treated water absorbent resin with a crosslinking agent. The particulate water-absorbing agent composition of the present invention contains a plant powder, and a water-absorbing resin having a surface portion and / or its vicinity surface-treated with a crosslinking agent,
Further, a malodor removal index represented by the following formula is 180 or more.

The malodor removing index = 1.1 × hydrogen sulfide removal ratio +
2.0 × methyl mercaptan removal rate + 0.3 × ammonia removal rate The odor removal index is an index calculated from three removal rates of hydrogen sulfide removal rate, methyl mercaptan removal rate, and ammonia removal rate, as described later. in the particulate water-absorbing composition of the present invention it is necessary that this malodor removing index is 180 or more. JP-A-2000-79159 and JP-A-11-116829 show the ability of a water-absorbent resin to remove malodorous substances and the deodorizing effect in actual use.
In Japanese Patent Application Laid-Open No. 2000-79159, the malodorous substance uses ammonia, and in fact, since the odor components in the liquid excreted from the body such as urine and menstrual blood are various, the ammonia removing performance is high. Not all smells are addressed. Japanese Unexamined Patent Publication No. 11-116829 discloses that the deodorizing effect of a water-absorbent resin can be measured by using ammonia, methylamine, and t-butyl mercaptan as malodorous substances in a state of not absorbing liquid (non-swelling state). measuring the residual concentration after time, as an evaluation close to the actual state using the absorbent article, after the elapse of a predetermined time by using human urine,
The gas concentrations of ammonia, methylamine, hydrogen sulfide and methyl mercaptan are measured to determine the deodorizing effect. However, since the effect of removing these offensive odor components is different from the sense of smell of humans, even if the removal of these offensive odors is high, it cannot be said that they are effective in actual use.

[0048] Further, removal measurements known malodorous substances, the concentration of malodorous components, the elapsed time and temperature to the measurement, use amount of the water-absorbent resin, results to differ depending on measurement conditions. Therefore, as a result of intensive studies on the water-absorbent resin that has a deodorizing effect in actual use, it contains the surface-treated water-absorbent resin and plant powder, and has the odor removal ability (under the odor removal index and ) Was found to be effective for actual use. The bad odor removal index is obtained by using ammonia, methyl mercaptan, and hydrogen sulfide as bad odor components, and the particulate water-absorbing agent composition expresses the removal rate of ammonia, methyl mercaptan, and hydrogen sulfide under a specific condition by the following relational expression. It is.

Odor removal index = 1.1 x hydrogen sulfide removal rate +
2.0 × As methylmercaptan removal ratio + 0.3 × ammonia removal ratio this, the particulate water-absorbing composition comprising a water-absorbent resin and the plant powder, by attaching importance to the removal rate of each malodorous components For the first time, it was possible to quantify the sense of smell of human odors. However, the relational expression of the present invention is related only to the particulate water-absorbing agent composition containing the water-absorbent resin and the plant powder, and is effective in actual use when its malodor removal index is 180 or more. For the first time.

In general, a particulate water-absorbing agent composition having a malodor removal index of 180 or more is not always effective in a liquid excreted from the body such as urine and menstrual blood. This is because the particulate water-absorbing agent composition including the water-absorbing resin and the plant powder has a practical odor removing power (a power for removing various odorous components in the liquid excreted outside the body) of ammonia,
In the above relational expression using methyl mercaptan and hydrogen sulfide,
It is thought that it can be simulated. The odor removal index is preferably 200 or more, more preferably 22 or more.
It is 0 or more, further preferably 240 or more, still more preferably 260 or more, and particularly preferably 280 or more. If the malodor removal index is smaller than 180, the effects of the present invention cannot be sufficiently exhibited, which is not preferable.

By selecting a water-absorbing resin and / or a plant powder in order to increase the malodor removal index of the particulate water-absorbing agent composition, it is possible to obtain a particulate water-absorbing agent composition having a higher deodorizing effect in actual use. I can do it. The particulate water-absorbing agent composition of the present invention more preferably has an absorption capacity of 25 g / g or more and 60 g / g or less, a suction index under pressure of 14 g / g or more, and an absorption rate of 60 seconds or less. The absorption capacity is more preferably at least 27 g / g, even more preferably 29 g / g.
g or more, particularly preferably 31 g / g or more. 25g
/ Undesirable absorption is insufficient at less than g. 60
g / g larger than the gel strength is susceptible to gel blocking to weak, which is not preferable.

The above-mentioned suction index under pressure means that the water-absorbing resin is
This is a new parameter that measures the force to suck the liquid from the paper, and is represented by the sum of the value of the liquid absorption time in 3 minutes and the value in 60 minutes. When this value is high, the power of sucking the liquid around the particulate water-absorbing agent composition is large, and the liquid excreted outside the body such as urine and menstrual blood that generates an odor is taken up, and the deodorizing effect of the plant powder is enhanced. Work. Further, the present action exerts not only the deodorizing effect of the particulate water-absorbing agent composition but also an excellent deodorizing effect in an absorbent article. The suction index under pressure is more preferably 16 g / g or more, still more preferably 18 g / g or more, and particularly preferably 20 g / g or more.

The absorption rate is more preferably 55 seconds or less, and even more preferably 50 seconds or less. Slow the absorption of liquid and when it is more than 60 seconds, so also decreased deodorant effect,
Not preferred. Further, the above absorption capacity under pressure suction index, absorption characteristics represented by the rate of absorption, not only deodorizing effect, the actual reduction of leakage of an absorbent article, decrease in return amount,
Prevents butt rash and improves dry feeling. The particulate water-absorbing agent composition of the present invention preferably has a weight average particle diameter in the range of 100 to 600 μm, more preferably 200 to 600 μm.
Within the scope of ～500Myuemu, and the proportion of particles less than 106μm is preferably 10 wt% or less, more preferably 5
% By weight, more preferably 3% by weight or less.

The particulate water absorbing agent composition of the present invention is preferably used for sanitary materials. The absorbent article of the present invention includes an absorbent layer containing the particulate water-absorbing agent composition of the present invention, a surface sheet having liquid permeability (also referred to as liquid permeability), and liquid impermeable (also referred to as liquid impermeability). It is an absorbent article provided with the back sheet which has. In the absorbent article of the present invention, the weight ratio of the particulate water-absorbing agent composition contained in the absorbent layer is preferably 0.3 or more. Preferably, the weight ratio of the particulate water absorbing agent composition to the total amount of the hydrophilic fibers and the particulate water absorbing agent composition is 0.3 or more. The weight ratio is more preferably 0.1.
The range is from 4 to 1.0, and more preferably from 0.5 to 0.8.

In the absorbent article of the present invention, when the weight ratio of the particulate water absorbing agent composition contained in the absorbent layer is less than 0.3, the amount of the particulate water absorbing agent composition used is small, and In some cases, the deodorizing performance is not sufficiently imparted, which is not preferable. The water-absorbing resin constituting the particulate water-absorbing agent composition contained in the absorbent layer of the absorbent article of the present invention contains a crosslinked body of polyacrylic acid (salt) as a main component. Particulate water-absorbing composition contained in the absorbent layer of the absorbent article of the present invention is the particulate water-absorbing composition according to the present invention, the malodor removing index represented by the following formula is 180 or more Features.

Odor removal index = 1.1 × hydrogen sulfide removal rate +
2.0 × methyl mercaptan removal rate + 0.3 × ammonia removal rate Further, the particulate water-absorbing agent composition contained in the absorbent layer of the absorbent article of the present invention preferably has an absorption capacity of 25 g / g or more and 60 g / g. Hereinafter, the suction index under pressure is 14 g / g or more,
The absorption speed is 60 seconds or less. The absorption capacity is more preferably at least 27 g / g, even more preferably 29 g / g.
g or more, particularly preferably 31 g / g or more. The suction index under pressure is more preferably 16 g / g or more, still more preferably 18 g / g or more, and particularly preferably 20 g / g or more.
/ G or more. The absorption rate is more preferably 55 seconds or less, even more preferably 50 seconds or less.

Further, the particulate water-absorbing agent composition contained in the absorbent layer of the absorbent article of the present invention preferably has an object color (L, a, b) where L is 40 or more and the absolute value of a There 6
And b is 0 or more and 15 or less. L is more preferably 50 or more, and further preferably 60 or more.
The absolute value of a is more preferably 5 or less, more preferably 4 or less. b is more preferably 0 or more and 14 or less, further preferably 0 or more and 13 or less. When the object color out of the above range is used for a diaper, the object color is recognized as a foreign object by a consumer, which is not preferable. Although the absorbent article of the present invention preferably has the above-described form, one particularly preferable form is a weight ratio of the particulate water-absorbing composition to the total amount of the hydrophilic fiber and the particulate water-absorbing composition. There 0.3
An absorbent article comprising the above-described absorbent layer including the absorber, a liquid-permeable (also referred to as liquid-permeable) top sheet, and a liquid-impermeable (also referred to as liquid-impermeable) back sheet. Wherein the particulate water-absorbing composition is polyacrylic acid (salt)
An absorbent article characterized in that the particulate water-absorbing composition has the following properties.

The odor removal index is 180 or more The suction index under pressure is 14 or more The object color (L, a, b) is such that L is 40 or more, the absolute value of a is 6 or less, and b is 0 or more and 15 or less Absorption capacity is 25 g / g or more and 60 g / g or less. Absorption rate is 60 seconds or less. The method for producing the absorbent article is, for example, by blending or sandwiching a fiber base material and a particulate water-absorbing agent composition. ), And the absorbent core is sandwiched between a liquid-permeable (also referred to as liquid-permeable) base material (top sheet) and a liquid-impermeable (also referred to as liquid-impermeable) base material (back sheet). If necessary, an absorbent article, especially an adult paper diaper or a sanitary napkin may be provided by providing an elastic member, a diffusion layer, an adhesive tape, or the like. Such an absorbent core has, for example, a density of 0.06 to 0.50 g / c.
c, compression molded to a basis weight of 0.01 to 0.20 g / cm ² ; In addition, as a fiber base material to be used, hydrophilic fibers such as pulverized wood pulp, cotton linter, cross-linked cellulose fiber, rayon, cotton, wool, acetate, and vinylon can be exemplified. Preferably it is obtained by air-laid them.

The above hydrophilic fibers are preferably wood pulp, chemical pulp, kraft pulp,
Cotton, rayon, cotton, wool, acetate, vinylon, polyolefin fiber, polyester fiber. These may be a single fiber or a fiber obtained by compounding two or more kinds into a laminated structure or a core-sheath structure. Among them, those having a hydrophobic fiber surface have been subjected to a hydrophilic treatment. The hydrophilic fiber obtained from a plant is not a powder but a fibrous one. The term fibrous generally refers to a thin thread-like substance, and preferably has an aspect ratio value larger than the range of the aspect ratio of the plant fiber according to the present invention. The aspect ratio is a value calculated from an aspect ratio = major axis / minor axis from the major axis and minor axis of the hydrophilic fiber.

As described above, the particulate water absorbing agent composition of the present invention can impart a deodorizing function to an absorbent article, and exhibits excellent deodorizing performance and excellent absorption characteristics over a long period of time. Specific examples of such absorbent articles include hygiene materials such as adult paper diapers, which have been growing remarkably in recent years, diapers for children, sanitary napkins, so-called incontinence pads, and the like, and are particularly limited thereto. Although it is not a thing, the particulate water-absorbing agent composition present in the absorbent article has extremely excellent deodorant properties and gel stability, and has a small amount of return and a remarkable dry feeling. Who is
The burden on caregivers can be greatly reduced.

[0061] Further, the absorber of the present invention, hydrophilic fibers, a absorber containing a plant powder and the water-absorbent resin, as a particulate water absorbing agent composition comprising a mixture of the plant powder and the water-absorbent resin The odor removal index represented by the following formula is 180.
It is characterized by the above. Odor removal index = 1.1 × removal rate of hydrogen sulfide + 2.0 × removal rate of methyl mercaptan + 0.3 × ammonia removal rate Means that the plant powder and the water-absorbent resin are obtained as a particulate water-absorbing composition obtained when they are mixed in the weight ratio used for the absorber.

The absorbent of the present invention may incorporate the plant powder and the water-absorbing resin separately into the absorbent. Preferably comprises a particulate water-absorbing composition in which the plant powder is supported on the water-absorbing resin. That is, at least a portion of the plant powder and the water-absorbing resin contained in the absorber, it is preferable that the plant powder is one which is supported on the water-absorbing resin.

[0063]

EXAMPLES The following examples and comparative examples, the present invention will be described in more detail, the present invention is not limited to these examples. The various properties of the water absorbent resin and the volume average particle diameter of the plant powder were measured by the following methods. (A) uniformly placed absorbency absorbent resin (or particulate water-absorbing composition) 0.2 g in a bag made of nonwoven fabric (60mm × 60mm), 25
It was immersed in 100 g of a 0.9% by weight aqueous solution of sodium chloride (physiological saline) adjusted to ° C. After 60 minutes, the bag was lifted, and after draining at 250 G for 3 minutes using a centrifuge, the weight W2 (g) of the bag was measured. The same operation was performed without using the water-absorbing resin, and the weight W1
(G) was measured. Then, from these weights W1 and W2, the following equation: Absorption capacity (g / g) = (weight W2 (g) −weight W1
The absorption capacity (g / g) was calculated according to (g)) / 0.2 (g).

(B) Suction Force Under Pressure and Suction Index Under Pressure First, the measuring device used for measuring the suction force under pressure is described below.
A brief description is given below with reference to FIG. As shown in FIG. 1, a measuring device includes a container 1, a filter paper 2 (manufactured by Advantech Co., No. 2, diameter 90 mm, 10 sheets) and a measuring unit 3.
Consists of In a container 1, 25 g of artificial urine 4 (artificial urine composition: 97.1 g of deionized water, urea 1.
9 g, sodium chloride 0.8 g, magnesium chloride hexahydrate 0.1 g, calcium chloride 0.1 g) is on.

The measuring section 3 has a support cylinder 5, a wire mesh 6 attached to the bottom of the support cylinder 5, and a weight 7. The measuring unit 3 is configured such that the support cylinder 5 (that is, the wire mesh 6) is placed on the filter paper 2 in this order, and the weight 7 is placed inside the support cylinder 5, that is, on the wire mesh 6. there. The support cylinder 5 has an inner diameter of 60 mm. The wire mesh 6 is made of stainless steel, and is formed in 400 mesh (mesh size: 38 μm). Support cylinder 5 and the wire mesh 6
Has been adjusted to a total weight of 62 g. Then, a predetermined amount of the water-absorbing resin (or the particulate water-absorbing agent composition) is evenly spread on the wire mesh 6. The weight of the weight 7 is adjusted so that a load of 1.96 kPa can be uniformly applied to the wire mesh 6, that is, the water absorbent resin.

The suction force under pressure and the suction index under pressure were measured using the measuring apparatus having the above-mentioned configuration. The measuring method will be described below. (1) under pressure suction force it was first placed on the filter paper 2 on the container 1. Next, 25 g of artificial urine 4 adjusted to 25 ° C. is put into the filter paper 2 so as to be absorbed. On the other hand, in parallel with these mounting 置動 operation, the internal supporting cylinder 5, namely, the water-absorbing resin on the wire net 6 (or particulate water-absorbing composition) 1.0 g was uniformly sprayed, weight on the water-absorbent resin 7 was placed. The weight of the support cylinder 5 including the water-absorbent resin and the weight 7 was measured (weight W1).

Next, the supporting cylinder 5 on which the water-absorbent resin and the weight 7 were placed was placed at the center of the filter paper 2. Then, artificial urine was sucked for 60 minutes from the time when the support cylinder 5 was placed on the filter paper 2. After 60 minutes, the weight of the support cylinder 5 including the weight 7 and the water-absorbing resin from which the artificial urine was sucked was measured (weight W2). And these weights W1, W
From equation (2), the suction force under pressure (g / g) = (weight W2 (g) −weight W1
(G)) / 1.0 (according to g), under pressure suction force after 60 minutes from the absorption initiation (g /
g) was calculated.

(2) Initial suction force under pressure In the measurement of the suction force under pressure determined in (1) above, 60
The same operation was performed except that artificial urine was sucked in for 3 minutes. That is, artificial urine is sucked for 3 minutes,
Three minutes later, the weight (weight W3) of the support cylinder 5 including the water-absorbent resin from which the artificial urine was sucked and the weight 7 was measured. It was calculated from the equation. Initial suction force under pressure (g / g) = (weight W3 (g)-weight W1 (g)) / 1.0 (g) (3) Suction index under pressure The load determined in (1) and (2) above. from rolling suction force and initial pressure suction force, the following equation, under pressure suction index (g / g) = initial pressure suction power (g /
g) + Suction index under pressure (g / g) was calculated according to g) + suction force under pressure (g / g).

[0069] (c) of the absorption rate in advance 100ml beaker (produced by Sogo physics and chemistry Glass Works issue of GENERAL CATALOGUE
A-7000, TOP beaker, CAT. N
o. 501, JIS R-3503 compliant body diameter × height =
50 g of blue-colored physiological saline (composition shown below) adjusted to 30 ° C. at 55 (mm) × 70 (mm)) and a white stirrer (Teflon (registered trademark), General Catalog 2)
0,000 edition, Issued by: Freon Kogyo Co., Ltd., Teflon (registered trademark) stirrer SA type, product number: SA-40, total length 40 mm x diameter 8 mm), and stirred with a magnetic stirrer at a speed of 600 rpm. Keep it. When 2.0 g of the water-absorbing resin (or the particulate water-absorbing agent composition) is charged therein, gelation of the test liquid is promoted, the vortex is reduced, and the test liquid covers the stirrer. Stirrer from the sample putting is about to disappear when (eddy covered in the test solution, stirring bar rotates were visible initially is the protrusion of the vortex,
The time (seconds) required until it disappeared was measured and this was taken as the absorption rate.

The composition of physiological saline colored blue is shown below. Deionized water 991 parts by weight of sodium chloride 9 parts by weight Food Additives, Food Blue No. 1 0.02 part by weight (food additives, Food Blue No. 1: Benzyl - ethyl - [4
'-(4''-(benzylethylamino) -diphenylmethylene) -2', 5-cyclohexadienylidene]-
Ammonium-2 ", 3,3""-trisodiumtrisulfonate; Brilliant Blue FCF; CIN
o. 42090; CI Food blue 2) (d) object color Nippon Denshoku Industries Co., Ltd. SZ-sigma (sigma) 80 type COL
After the XYZ values were calibrated with a standard white plate using OR MEASURING SYSTEM, the color of the water-absorbent resin (or the particulate water-absorbing agent composition) was measured, and the L, a, and b values were determined to obtain the object color.

(E) Weight-average particle diameter of water-absorbent resin (and particulate water-absorbing agent composition) 10 g of water-absorbing resin (and particulate water-absorbing agent composition) is JIS standard sieve having an inner diameter of 75 mm (850 μm, 600 μm, 3 μm).
00 μm, 150 μm, 106 μm) using a sieve shaker (IIDA SEISAKUSHO CO., L
TD. Made, IIDA SIEVE SHAKER ES
(65-type) for 5 minutes to classify and classify each particle size (850 μm on product / 850-600 μm / 600-3)
00 μm / 300-150 μm / 150-106 μm /
The weight of the 106μm path product) was measured. Further, the weight average particle diameter (D50) was obtained by plotting the obtained particle size distribution on logarithmic probability paper.

[0072] (f) JIS standard sieve size plant powder 10g inner diameter 75mm plant powder particles (850
μm, 600 μm, 500 μm, 300 μm, 150 μ
m, 106 [mu] m, 75 [mu] m, 45 [mu] m) using an appropriate,
Sieve shaker (IIDA SEISAKUSHO C
O. , LTD. Made, IIDA SIEVE SHAKE
RES-65), room temperature 25 ° C, relative humidity 45
After shaking for 5 minutes under the condition of%, the particle size of the plant powder was examined. (G) Moisture content of plant powder 1.0 g of plant powder was placed in an aluminum cup (GENERAL CATALOGUE issued by Mutual Science Chemical Glass Co., Ltd.).
A-7000, aluminum cup, type 107, capacity 60 ml, upper diameter x lower diameter x height = 65 (mm) x 53
(Mm) × 23 (mm)). Dryer (T
OKYO RIKAKIKAI CO. , LTD. Made,
After drying for 3 hours at 105 ° C. using a NATURAL OVEN NDO-450), was weighed W (g). Then, from the weight W, the water content (%) of the plant powder was calculated according to the following equation: water content (%) = (1.0 (g) -W (g)) × 100.

(H) Powder odor strength 120 ml polypropylene cup with lid (Terraoka Co., Ltd., Pack Ace, caliber (mm) × bottom diameter (mm)
× water-absorbent resin (or particulate water-absorbing composition to the height (mm) = 58 × 54 × 74)) placed 2.0 g, was capped this vessel was maintained at 25 ° C.. One hour later, the lid was opened, and the odor intensity was determined by smelling odors from 20 adult panelists from a position about 3 cm from the top of the cup. 0: (odorless), 1: (very faint), 2: (very faint), 3: (easy to feel), 4: (strong), 5: (very strong) It describes a score, and the average value was obtained.

(I) Deodorizing test (water-absorbing resin or particulate water-absorbing agent composition) A 50-ml sample was taken from a mixture of human urine collected from 10 adults, and a 120-ml polypropylene cup with a lid (Teraoka Co., Ltd., pack Ace, caliber (mm) x lower diameter (mm) x height (mm) = 58 x 54 x 74)
The water absorbing resin (or particulate water absorbing agent composition) 2.0
A swollen gel was formed by adding g. Human urine was used within 2 hours after excretion. Cover this container,
The swollen gel was kept at 37 ° C. 1 minute after the elapse after the liquid absorbent (initial) and 3 hours, open the lid after 6 hours, panelists adult twenty from a position approximately 3cm from the top of the cup by smell, was determined deodorizing effect.

1: (odorless), 2: (almost no noticeable odor), 3: (perceptible but acceptable odor), 4:
Scores were given at five levels for each person on the basis of a criterion of (strong odor) and 5: (strong odor), and the average value was calculated. In addition, the thing which performed the same operation only by human urine without adding a water absorbing resin (or particulate water absorbing agent composition) was made into a standard product, and the odor was set to 5, and the deodorizing effect was evaluated. (J) Gel stability 120 ml polypropylene cup with lid (Teraoka Co., Ltd., Pack Ace, caliber (mm) × bottom diameter (m
m) × height (mm) = 58 × 54 × 74), 1 g of a water-absorbent resin (or particulate water-absorbing agent composition) was swollen into 25 ml of artificial urine containing 0.005% by weight of L-ascorbic acid. The container was capped and left at 37 ° C. for 16 hours. After standing, it was evaluated by the feel of the gel.

：: (the gel is firm), Δ:
(Gel is softened), × :( gel is completely collapsed to have) that criterion was evaluated gel stability. The composition of the artificial urine is shown below. Deionized water 97.1 g Urea 1.9 g Sodium chloride 0.8 g Magnesium sulfate 0.1 g Calcium chloride 0.1 g (k) Odor removal index (1) Hydrogen sulfide removal rate glass Works issued the GENERAL CATALOG
UE A-7000, TOP Erlenmeyer flask, CA
T. No. 506, JIS R-3503, maximum diameter x height = 81 (mm) x 131 (mm)), 50 g of 0.9 wt% sodium chloride aqueous solution (physiological saline) and water absorbent resin (or particulate water absorbing agent) composition) were placed 10.0 g, were uniformly inflated. After the Erlenmeyer flask was sealed with a silicone rubber stopper, a predetermined amount of standard gas was injected from the silicon rubber stopper with a syringe having a syringe needle, and allowed to stand at 25 ° C. Three hours later, 1 ml of the headspace gas was collected from a silicone rubber stopper with a syringe having a syringe needle, and subjected to gas chromatography ((Analysis conditions: equipment; G manufactured by Shimadzu Corporation)
C-14A, detector: FPD, column temperature: 70 ° C., carrier: N ₂ , carrier flow rate: 30 ml / min),
(Column used: manufacturer; manufactured by Shinwa Kako Co., Ltd., liquid phase;
1,2,3-tris (2-cyano-ethoxy) propane
25%, carrier; Shimalaite AW-DMCS
-ST 80-100 mesh, column size: Φ3m
m × 3M)) to measure the gas concentration C2 (ppm). The same operation was performed without using a 0.9% by weight aqueous sodium chloride solution and a water-absorbing resin (or a particulate water-absorbing agent composition), and the gas concentration C1 (ppm) at that time was measured. From these gas concentrations C1 and C2, the removal rate (%) of hydrogen sulfide was calculated according to the following equation: removal rate (%) = (gas concentration C1−gas concentration C2) / gas concentration C1 × 100.

[0077] water-absorbent resin (or particulate water-absorbing composition)
Three measurements were performed for each type, and the average value was determined. The concentration and injection volume of standard gas used are shown below. Concentration Injection amount 6110 ppm of hydrogen sulfide / N ₂ Balance
82 ml A method for preparing a calibration curve for measuring gas concentration is described below. Standard gas (hydrogen sulfide concentration 6110 ppm / N ₂ B
Using alance), to create a gas to a concentration of 1,3,10,20Ppm, the 1ml was analyzed by gas chromatography to determine the peak Area.

[0078] X value Peak Area was calculated by gas concentration (ppm) and Y values, plotted in log-log graph, a calibration curve was prepared. (2) Methyl mercaptan removal rate Sealable 200 ml Erlenmeyer flask (GENERAL CATALOG, published by Kyorigaku Kagaku Seisakusho Co., Ltd.)
UE A-7000, TOP Erlenmeyer flask, CA
T. No. 506, JIS R-3503, maximum diameter x height = 81 (mm) x 131 (mm)), 50 g of 0.9 wt% sodium chloride aqueous solution (physiological saline) and water absorbent resin (or particulate water absorbing agent) composition) were placed 10.0 g, were uniformly inflated. After the Erlenmeyer flask was sealed with a silicone rubber stopper, a predetermined amount of standard gas was injected from the silicon rubber stopper with a syringe having a syringe needle, and allowed to stand at 25 ° C. Three hours later, 1 ml of the headspace gas was collected from a silicone rubber stopper with a syringe having a syringe needle, and subjected to gas chromatography ((Analysis conditions: equipment; G manufactured by Shimadzu Corporation)
C-14A, detector: FPD, column temperature: 70 ° C., carrier: N ₂ , carrier flow rate: 30 ml / min),
(Column used: manufacturer; manufactured by Shinwa Kako Co., Ltd., liquid phase;
1,2,3-tris (2-cyano-ethoxy) propane
25%, carrier; Shimalaite AW-DMCS
-ST 80-100 mesh, column size: Φ3m
m × 3M)) to measure the gas concentration C4 (ppm). The same operation was performed without using a 0.9% by weight aqueous sodium chloride solution and a water-absorbing resin (or a particulate water-absorbing agent composition), and the gas concentration C3 (ppm) at that time was measured. Then, from these gas concentrations C3 and C4, the removal rate (%) for methyl mercaptan according to the following equation: removal rate (%) = (gas concentration C3-gas concentration C4) / gas concentration C3 × 100.
Was calculated.

Water absorbing resin (or particulate water absorbing agent composition)
Three measurements were performed for each type, and the average value was determined. The concentration and injection volume of standard gas used are shown below. concentration
Injection volume methyl mercaptan 5960ppm / N ₂ Balanc
e 0.84 ml A method for preparing a calibration curve for measuring gas concentration is described below. Standard gas (methyl mercaptan concentration 5960 pp
m / N ₂ Balance) used, 1,3,10,20
A gas having a concentration of ppm was prepared, and 1 ml of the gas was analyzed using gas chromatography to measure the peak area.

A calibration curve was prepared by plotting the determined peak Area as an X value and the gas concentration (ppm) as a Y value on a log-logarithmic graph. (3) Ammonia removal rate 10.0 g of a water-absorbing resin (or particulate water-absorbing agent composition) in a 3 L odor bag (manufactured by Omi Odoair Service Co., Ltd.)
50 g of a mixed solution having a 29% aqueous ammonia: 0.9% by weight aqueous sodium chloride solution = 1: 49 weight ratio was added and uniformly swollen. 3 L of odorless air was injected into the odor bag, sealed with a silicone rubber stopper, and left at 25 ° C. After 3 hours, the silicone rubber stopper was removed to prevent the intrusion of outside air, and a gas extractor (manufactured by Gastech, GV-100S) and a gas detection tube (manufactured by Gastech, No. 3HM, No. 3)
M, No. 3L) was used to measure the atmosphere concentration C6.
Further, the same operation was performed without using the water-absorbing resin (or the particulate water-absorbing agent composition), and the atmospheric concentration C5 at that time was measured. From these concentration C5, C6, equation removal ratio (%) = (concentration C5- concentration C6) / concentration C5 × 1
According to 00, the ammonia removal rate (%) was calculated.

Water absorbing resin (or particulate water absorbing agent composition)
Three measurements were performed for each type, and the average value was determined. (4) malodor removing index above (1), (2), (3) the determined hydrogen sulfide removal ratio was calculated malodor removing index by applying methylmercaptan removal ratio, the ammonia removal rate the following formula. Odor removal index = 1.1 x hydrogen sulfide removal rate + 2.0 x methyl mercaptan removal rate + 0.3 x ammonia removal rate (l) Absorption performance evaluation of absorbent article (absorption rate and actual absorption amount) 50 parts by weight of the wood pulp and 50 parts by weight of the particulate water absorbing agent composition were dry-mixed using a mixer. Next, the obtained mixture was air-formed on a wire screen formed into a 400 mesh (mesh size of 38 μm) using a batch-type air-forming device to form a web having a size of 120 mm × 400 mm. . Further, the web was pressed at a pressure of 196.14 kPa for 5
By pressing for 2 seconds, the basis weight is about 0.047 g / c
An m ² absorber was obtained.

Subsequently, a back sheet (liquid-impermeable sheet) made of liquid-impermeable polypropylene and having a so-called leg gather, the above-mentioned absorber, and a top sheet (liquid-permeable sheet) made of liquid-permeable polypropylene Are adhered to each other in this order using a double-sided tape, so that an absorbent article (ie, an adult urine absorbing pad) can be used.
I got The weight of this absorbent article was 44 g. Then, the absorbent article spread, thereon, 140 mm × 50
A 20 mm wire mesh of 0 mm was placed. Furthermore, on top of that, a size of 150 mm × 400 mm and a total weight of 22 mm
000g, center diameter 70mm, height 80mm
A device for measuring performance under load of an absorbent article having a cylinder was placed between the left and right leg gathers and the center of the cylinder was at the center of the absorbent article. From the cylindrical portion, adjusted artificial urine (composition 37 ° C.: Urea 1.9 wt%, NaCl
0.8 wt%, calcium chloride 0.1 wt%, was poured at a stretch 150g of an aqueous solution) of 0.1% by weight of magnesium sulfate. Thereafter, the mixture was allowed to stand for 1 hour, and 150 g of artificial urine was poured at once. The time until the artificial urine was completely absorbed from the top sheet of the absorbent article was observed from above, and the absorption rate (second) was measured.

[0083] an hour after leaving from pouring artificial urine for the second time, except for the wire mesh of the performance measurement system and the 20 mesh of the absorbent article from the absorbent article, a paper towel (manufacturer: Oji Paper Co., Ltd., kitchen towel extra dry, 12
The 0 mm × those stacked 30 sheets and cut into a 450 mm) placed on the absorbent article, on which, 37g / cm ² (3.63
kPa) was applied for one minute, and the liquid amount W1 returning to the paper towel was measured. Also, first pour artificial urine, then 2
During a period of time (ie, until the amount of liquid returning to the paper towel is measured), artificial urine that has not been absorbed by the absorbent article and leaked along the leg gathers is transferred to a paper towel (manufacturer: Oji Paper Co., Ltd., kitchen towel extra dry) ), And the leaked liquid amount W2 was measured.

Then, from these liquid amounts W1 and W2, the following equation is obtained: substantial absorption amount (g) = 300 (g) − (W1 (g) + W2
According (g)), it was calculated substantial amount of absorption absorbent article has absorbed (g). (M) Evaluation of Absorbing Performance of Absorbent Article (Deodorizing Test) 50 parts by weight of non-powder fibrous wood pulp and 50 parts by weight of a particulate water absorbing agent composition were dry-mixed using a mixer. Next, the obtained mixture was air-formed on a wire screen formed into a 400 mesh (mesh size of 38 μm) using a batch-type air-forming device to form a web having a size of 120 mm × 400 mm. . Further, the web was pressed at a pressure of 196.14 kPa for 5
By pressing for 2 seconds, the basis weight is about 0.047 g / c
An m ² absorber was obtained.

Subsequently, a back sheet (liquid-impermeable sheet) made of liquid-impermeable polypropylene and having a so-called leg gather, the above-described absorber, and a top sheet (liquid-permeable sheet) made of liquid-permeable polypropylene Were adhered to each other in this order using a double-sided tape, and two so-called tape fasteners were attached to the adhered product to obtain an absorbent article (that is, a paper diaper). The weight of this absorbent article was 46 g.
The above absorbent article was used as a monitor for 10 one-year-olds overnight, and collected the next day. An absorbent portion (a so-called core portion) made of a particulate water-absorbing agent composition and a fibrous wood pulp that is not a powder is cut into a size of 10 × 10 cm, and a 250-ml polypropylene cup with a lid (Teraoka Co., Ltd., Pack Ace) , Caliber (mm) x lower diameter (mm) x
Height (mm) = 69 × 63 × 97). The container was capped and the absorber section was kept at 37 ° C. One hour later, open the lid, and place an adult 20
The name paneler smelled the odor to determine the deodorant effect.

1: (odorless), 2: (almost no noticeable odor), 3: (perceptible but acceptable odor), 4:
Scores were given at five levels for each person on the basis of a criterion of (strong odor) and 5: (strong odor), and the average value was calculated. (N) Evaluation of Absorbing Performance of Absorbent Article (Dry Feeling, Deodorizing Effect) 50 parts by weight of non-powder fibrous wood pulp and 50 parts by weight of a particulate water absorbing agent composition were dry-mixed using a mixer. Next, the obtained mixture was air-formed on a wire screen formed into a 400 mesh (mesh size of 38 μm) using a batch-type air-forming device to form a web having a size of 120 mm × 400 mm. . Further, the web was pressed at a pressure of 196.14 kPa for 5
By pressing for 2 seconds, the basis weight is about 0.047 g / c
An m ² absorber was obtained.

Subsequently, a back sheet (liquid-impermeable sheet) made of liquid-impermeable polypropylene and having a so-called leg gather, the above-mentioned absorber, and a top sheet (liquid-permeable sheet) made of liquid-permeable polypropylene Are adhered to each other in this order using a double-sided tape, so that an absorbent article (ie, an adult urine absorbing pad) can be used.
I got The weight of this absorbent article was 44 g. The above absorbent article was worn as a monitor by five male adults. The dry feeling after one urination was determined. 1: (sleeping) 2: (slightly wet)
3: The score was described in three steps for each person on the basis of the criterion of (not sticky), and the average value was obtained.

Further, an absorbent part (so-called core part) composed of a particulate water-absorbing agent composition and fibrous wood pulp which is not a powder is cut into a size of 10 × 10 cm, and a 250 ml polypropylene cup with a lid (stock). (Trade size (mm) × bottom diameter (mm) × height (mm) = 69 × 63 × 97). The container was capped and the absorber section was kept at 37 ° C. Open the lid after 6 hours, a panel of adult 20 people from a position of about 3cm from the top of the cup by smell the smell, to determine the deodorant effect. 1: (odorless) 2: (almost no odor),
3: appreciable but acceptable odor), 4 :( strong odor), and wherein the score in individuals 5 stage criteria of 5 :( strong odor), the average value was determined.

(O) Volume average particle diameter of plant powder The volume average particle diameter was determined using SALD-3000 (manufactured by Shimadzu Corporation). The measurement was performed based on the operation method specified in SALD-3000. The weight of the plant powder used for the measurement was performed in a region where the absorbance at the time of measurement is the measurement range. Reference Example 1 75 mol% of sodium acrylate having a neutralization degree of the aqueous solution 5500 g (monomer concentration: 33 wt%)
In, it was dissolving 4.00 g (average addition mole number of ethylene oxide: 8) Polyethylene glycol diacrylate reaction. Then, the reaction solution under a nitrogen gas atmosphere 30
Degassed for a minute. Then, the reactor by lidding a jacketed stainless twin-arm kneader having an inner volume of 10L for 2 inborn sigma type blades, and supplying the reaction liquid,
While maintaining the reaction solution at 30 ° C., the system was replaced with nitrogen gas. Subsequently, while stirring the reaction solution, sodium persulfate 2.
Was added 46g and L- ascorbic acid 0.10 g, polymerization was initiated about 1 minute later. And 30 ° C ~
The polymerization was carried out at 80 ° C., and the hydrogel polymer was taken out 60 minutes after the initiation of the polymerization. The obtained hydrogel polymer was subdivided into a diameter of about 5 mm. A 50-mesh (30 mesh size)
(0 μm) and dried with hot air at 150 ° C. for 90 minutes. Next, the dried product is pulverized by using a vibration mill, and further classified by a wire mesh of 20 mesh (mesh size: 850 μm) to obtain an amorphous crushed water-absorbent resin (a) having a weight average particle diameter of 295 μm. Was.

[0090] the water-absorbent resin (a) 100 parts by weight of obtained, consisting of propylene glycol 1 part by weight, and 0.05 parts by weight of ethylene glycol diglycidyl ether, and 3 parts by weight of water, isopropyl alcohol, 1 part by weight The surface crosslinking agent was mixed. The above mixture was heated at 210 ° C. for 50 minutes to obtain a water absorbent resin (1). This water-absorbent resin (1) has an absorption capacity of 33 (g / g), a suction force under pressure of 11 (g / g), and a suction index under pressure of 21 (g / g).
g), the absorption rate was 49 seconds. Also, the weight average particle size of this water absorbent resin is not so different from that of the water absorbent resin,
It was 295μm.

Reference Example 2 75 mol% in Reference Example 1
The monomer concentration of the aqueous solution of sodium acrylate having a neutralization ratio of 38% by weight, the cross-linking agent polyethylene glycol diacrylate was changed to 7.0 g of trimethylolpropane triacrylate, and the grinding conditions of the vibration mill were changed. Thus, an amorphous crushed water-absorbent resin (b) having a weight average particle diameter of 360 μm was obtained. To 100 parts by weight of the obtained water-absorbent resin (b), 1 part by weight of propylene glycol, 0.05 parts by weight of ethylene glycol diglycidyl ether, and 3 parts of water
A surface crosslinking agent consisting of 1 part by weight of isopropyl alcohol and 1 part by weight of isopropyl alcohol was mixed. The above mixture is heated at 210 ° C. for 45
By performing a heat treatment for a minute, a water absorbent resin (2) was obtained. The absorption capacity of the water absorbent resin (2) is 27 (g / g).
g), the suction force under pressure was 11 (g / g), the suction index under pressure was 20 (g / g), and the absorption rate was 50 seconds. Also,
The weight average particle diameter of this water absorbent resin was 360 μm, which was not much different from that of the water absorbent resin.

REFERENCE EXAMPLE 3 In Reference Example 2, an amorphous crushed water-absorbent resin (b) having a weight average particle diameter of 360 μm was obtained. This water absorbent resin (b) is referred to as a water absorbent resin (3),
This absorption capacity is 32 (g / g), and the suction force under pressure is 8 (g / g).
/ G), under pressure suction index 13 (g / g), the absorption rate was 75 seconds. [Reference Example 4] In Reference Example 2, the grinding conditions of the vibration mill were changed to obtain an irregularly crushed water-absorbent resin (c) having a weight average particle diameter of 440 µm. This water-absorbent resin (c) is referred to as a water-absorbent resin (4).
/ G), the absorption rate was 90 seconds.

Reference Example 5 In Reference Example 1, an amorphous crushed water-absorbent resin (a) having a weight average particle diameter of 295 μm was obtained. The water-absorbent resin (a) is a water-absorbent resin (5),
The absorption capacity is 45 (g / g), and the suction index under pressure is 9
(G / g), the absorption rate was 77 seconds. [Examples 1 to 27] Table 1 summarizes the types of water-absorbent resin and plant powder used. Particulate water absorbing agent composition (1-27)
Tables 3 and 4 summarize the various physical properties and deodorizing effects of. Absorbent articles (1 to 2) containing the particulate water absorbing agent compositions (1 to 27)
Table 7 summarizes some of the evaluations of the absorption performance of 7).

Hereinafter, the method for producing the absorbent compositions (1 to 27) will be described. Example 1 Water-absorbent resin (1) 10 obtained in Reference Example 1
0 parts by weight of pepper as vegetable powder (white pepper pine manufactured by Takasago Spice Co., Ltd. The white pepper pine used was a pass product having a water content of 10.3% and a particle size of 300 μm. The volume average particle diameter was 77 μm.) 0.1 Parts by weight were mixed by a dry blending method to obtain a particulate water-absorbing agent composition (1). The obtained particulate water-absorbing agent composition (1)
The ratio of the particles having a weight average particle diameter of 295 μm and less than 106 μm was 6% by weight.

Example 2 In Example 1, 0.5 part by weight of pepper was mixed by a dry blending method to obtain a particulate water absorbing agent composition (2). In the obtained particulate water-absorbing agent composition (2), the ratio of particles having a weight average particle diameter of 295 μm and less than 106 μm was 6% by weight. Example 3 water-absorbent resin obtained in Reference Example 1 (1) 10
0 parts by weight of a plant powder (sansho powder, manufactured by Takasago Spice Co., Ltd.), which has a water content of 9.0% and a particle size of 500 μm, and has a volume average particle diameter of 172.
μm. ) 0.5 part by weight was mixed by a dry blending method to obtain a particulate water-absorbing agent composition (3). The obtained particulate water-absorbing agent composition (3) had a weight average particle size of 295 μm,
The proportion of particles smaller than 06 μm was 6% by weight.

Example 4 Ginger (Ginger pine manufactured by Takasago Spice Co., Ltd.) was used as a plant powder in 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1. This ginger pine had a water content of 9.1%. A pass product having a particle size of 300 μm was used. The volume average particle size was 64 μm.) 0.5 part by weight and further 1.0 part by weight of ion-exchanged water were mixed, and then silicon dioxide (Aerosil 2 manufactured by Nippon Aerosil Co., Ltd.) was used as an inorganic powder.
00) was added to obtain a particulate water-absorbing composition (4). The obtained particulate water-absorbing agent composition (4)
The ratio of particles having a weight average particle diameter of 295 μm and less than 106 μm was 5% by weight.

Example 5 Pepper (Red Pepper Pine manufactured by Takasago Spice Co., Ltd.) was added as a vegetable powder to 100 parts by weight of the water-absorbent resin (2) obtained in Reference Example 2. The red pepper pine had a water content of 6.2%. A pass product having a particle size of 500 μm was used.The volume average particle size was 244 μm.) 0.5
The parts by weight were mixed by a dry blending method to obtain a particulate water-absorbing agent composition (5). In the obtained particulate water-absorbing agent composition (5), the weight-average particle diameter was 360 μm, and the ratio of particles having a particle diameter of less than 106 μm was 5% by weight. Example 6 Water-absorbent resin (2) 10 obtained in Reference Example 2
0 parts by weight of plant powder as parsley (produced by Yasuma Corporation)
Parsley powder CP. This parsley powder CP used was a pass product having a water content of 6.7% and a particle size of 300 μm. The volume average particle diameter of 142μm. ) 0.5 parts by weight by dry blending, to obtain a particulate water-absorbing composition (6). The obtained particulate water-absorbing composition (6) had a weight average particle size of 3
The proportion of particles having a particle size of less than 60 μm and less than 106 μm was 5% by weight.

Example 7 In Example 6, 1.0 part by weight of parsley was mixed by a dry blending method to obtain a particulate water absorbing agent composition (7). In the obtained particulate water-absorbing composition (7), the weight-average particle diameter was 360 μm, and the ratio of particles having a particle diameter of less than 106 μm was 5% by weight. Example 8 Water Absorbent Resin (1) 10 Obtained in Reference Example 1
0 parts by weight of green tea as a plant powder ( "Publisher: Co. Sogang (Location: Himeji City Aboshi-ku, Kakiuchi Kitamachi 1652-3)
Raw material name: green tea "was pulverized using a hammer mill. This pulverized green tea used was a pass product having a water content of 2.0% and a particle size of 850 μm. The volume average particle diameter was 287 μm.) 0.5 part by weight of dry The particles were mixed by a blending method to obtain a particulate water-absorbing agent composition (8).
Was 295 μm in weight average particle diameter, and the ratio of particles having a particle diameter of less than 106 μm was 6% by weight.

Example 9 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 was used as a plant powder for matcha (a seller:
Ito En, Ltd. (Location: Shibuya-ku, Tokyo Honcho 3-47-
10), Product name: Matcha 30g easily, Raw material name: Tea. This matcha had a water content of 3.4% and a particle size of 300 μm. The volume average particle size is 77 μm. ) 0.3 part by weight was mixed by a dry blending method to obtain a particulate water absorbing agent composition (9). The obtained particulate water-absorbing agent composition (9)
The ratio of the particles having a weight average particle diameter of 295 μm and less than 106 μm was 6% by weight.

Example 10 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 was mixed with green tea as a plant powder (“Publisher: Nishie Co., Ltd. (Location: 1 Kakiuchi-Kitamachi, Aboshi-ku, Himeji-shi)
652-3) Raw material name: green tea "was pulverized using a hammer mill. The pulverized green tea used had a water content of 2.4% and a particle size of 106 μm.) 0.5 part by weight, and further ion-exchanged water 2.0 parts by weight were mixed to obtain a particulate water-absorbing composition (10), which was obtained.
Has a weight average particle diameter of 295 μm and a ratio of particles having a particle diameter of less than 106 μm is 4% by weight.

[0101] [Example 11] Reference Example 1 in the resulting water-absorbing resin (1) black tea as a plant powder to 100 parts by weight ( "seller: Nippon Lever Co., Ltd. (Location: Shibuya, Shibuya-ku, Tokyo 2
-22-3) Product Name: Lipton YELLOW
LABEL "was pulverized using a hammer mill. The pulverized black tea had a water content of 6.8% and a particle size of 600 μm was used. The volume average particle diameter was 285 μm. The resulting mixture was mixed to obtain a particulate water-absorbing composition (11).
In 1), the weight average particle diameter was 295 μm, and the ratio of particles having a particle diameter of less than 106 μm was 6% by weight.

Example 12 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 was used as a plant powder as oolong tea (“Manufacturer: Ujien Co., Ltd. (Location: 1-2-2 Mikagenakacho, Higashitanada-ku, Kobe-shi) No. 22) Product name: Oolong tea "was ground using a hammer mill. This ground Oolong tea product had a water content of 4.8.
%, A particle size of 850 μm pass product was used. The volume average particle size is 290 μm. ) 0.2 parts by weight were mixed by a dry blending method to obtain a particulate water absorbing agent composition (12). The resulting particulate water-absorbing composition (12) had a weight-average particle size of 2
The ratio of particles having a particle size of less than 95 μm or 106 μm was 6% by weight.

[0103] [Example 13] Puaru tea ( "seller as the water-absorbing resin (2) plant powder to 100 parts by weight of the obtained in Reference Example 2: dew of Uji Tea Co., Ltd. (Location: Kyoto Sagara-gun, Yamashiro-cho Uegamijin Higashi Tsuzumichi 50) Product name: Pu'er tea "was ground using a hammer mill. The ground material of Pu'er tea used was a pass product having a water content of 7.8% and a particle size of 600 µm. The volume average particle diameter was 256 µm. .) 0.5 part by weight were mixed by a dry blending method to obtain the particulate water-absorbing composition (13). Obtained particulate water-absorbing composition (13)
Has a weight average particle diameter of 360 μm and a ratio of particles having a particle diameter of less than 106 μm is 5% by weight.

Example 14 100 parts by weight of the water-absorbent resin (2) obtained in Reference Example 2 was dried with green tea extract slag as a plant powder (“Distributor: Nishie Co., Ltd. (Location: Aboshi-ku, Himeji-shi) 1652-3 Kakiuchi Kitamachi Ingredients: Green tea "10g
Into 500 g of ion-exchanged water at about 95 ° C. and mix.
And filtered after minute. This residue (i.e., green tea extract residue) is removed by 6
After drying at 0 ° C. under reduced pressure, it was pulverized using a hammer mill.
The dried and ground green tea extract residue had a water content of 6.3% and a particle size of 850 μm. Volume average particle size is 346μ
m. ) 0.5 parts by weight were mixed by a dry blending method to obtain a particulate water-absorbing agent composition (14). The obtained particulate water-absorbing composition (14) had a weight average particle diameter of 360 μm.
m, the proportion of particles smaller than 106 μm was 5% by weight.

Example 15 100 parts by weight of the water-absorbent resin (2) obtained in Reference Example 2 was dried with black tea extract as a plant powder (“Seller: Nippon Lever Co., Ltd. (Location: Shibuya-ku, Tokyo) Shibuya 2-22-3) Product name: Lipton
10 g of YELLOW LABEL was put into 500 g of ion-exchanged water at about 95 ° C., mixed and filtered after 5 minutes. The residue (that is, black tea extract residue) was dried at 60 ° C. under reduced pressure, and then pulverized using a hammer mill. The dried and ground black tea residue was used as a pass product having a water content of 7.9% and a particle size of 850 μm.The volume average particle size was 352 μm.) 1.0 part by weight and further 1.0 part by weight of ion-exchanged water were used. Then, 0.3 parts by weight of silicon dioxide (Aerosil 200 manufactured by Nippon Aerosil Co., Ltd.) was mixed as an inorganic powder to obtain a particulate water-absorbing composition (15). In 15), the weight average particle diameter was 360 μm, and the ratio of particles having a particle diameter of less than 106 μm was 4% by weight.

Example 16 A dried product of oolong tea extract slag as a plant powder in 100 parts by weight of the water-absorbent resin (2) obtained in Reference Example 2 (“Manufacturer: Ujien Co., Ltd. (Location: Higashinada-ku, Kobe-shi) Mikagenaka-cho 1-chome No. 2 No. 22) Product name:. oolong Tea "10g mixed put in the ion exchange water 500g of about 95 ℃, and filtered after 5 minutes in the filter residue (ie oolong tea extract residues) 60 ℃ After drying under reduced pressure, the mixture was ground using a hammer mill, and the dried and ground oolong tea extract was used as a pass product having a water content of 6.5% and a particle size of 600 μm. Were mixed by a dry blending method to obtain a particulate water absorbing agent composition (16).
In the obtained particulate water-absorbing composition (16), the weight-average particle diameter was 360 μm, and the ratio of particles having a particle diameter of less than 106 μm was 5% by weight.
Met.

Example 17 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 was used as a plant powder as a plant powder (“Seller: SB Foods Co., Ltd. (Location: No. 18, Nihonbashi Kabutocho, Chuo-ku, Tokyo) No. 6) Trade name: "Kizami Yuzu" was pulverized using a hammer mill.
And a pass product having a particle size of 850 μm was used. ) 1.0 parts by weight,
Further, 1.0 part by weight of ion-exchanged water was mixed to obtain a particulate water-absorbing agent composition (17). In the obtained particulate water-absorbing agent composition (17), the weight-average particle diameter was 295 μm, and the ratio of particles having a particle diameter of less than 106 μm was 5% by weight.

Example 18 Lime skin (generally available lime skin was peeled) as a plant powder in 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1, and the skin was ground with a mixer. After drying under reduced pressure at 60 ° C., the mixture was further pulverized using a hammer mill.The dried pulverized lime skin had a water content of 5.6% and a particle size of 850 μm pass product was used.) 0.5 weight Parts by dry blending, and 2.0 parts by weight of ion-exchanged water were further mixed to obtain a particulate water absorbing agent composition (18). The obtained particulate water-absorbing agent composition (18) had a weight average particle size of 295 μm and 106 μm.
The proportion of particles less than 4% by weight.

Example 19 A mandarin peel (a commercially available mandarin peel (from Arita)) was peeled as vegetable powder from 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1.
After drying under reduced pressure at to 60 ° C. grinding the bark in a mixer,
It was further pulverized using a hammer mill. The moisture content of the dried and ground citrus peel was 4.5%, and a 850 μm particle size pass product was used. ) 1.0 part by weight, and ion-exchanged water 2.0
Then, 0.3 parts by weight of silicon dioxide (Aerosil 200, manufactured by Nippon Aerosil Co., Ltd.) was mixed as an inorganic powder to obtain a particulate water absorbing agent composition (19). The resulting particulate water-absorbing composition (19) had a weight-average particle size of 2
The ratio of particles having a particle size of 95 μm or less than 106 μm was 4% by weight.

[Example 20] Kelp ("Manufacturer: Maruzen Naya Shoten Co., Ltd. (Location: 28-1, Shinkawacho, Hakodate-shi, Hokkaido)" as a plant powder in 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 No.) Product name: Hidaka Kizami Waka Kombu was cut as finely as possible with scissors and ground using a hammer mill. The crushed kelp product had a water content of 9.9% and a particle size of 8
A 50 μm pass product was used. ) 1.0 part by weight, further mixed with ion-exchanged water 1.0 part by weight, then the inorganic powder as the silicon dioxide (manufactured by Nippon Aerosil Co., Aerosil 200)
0.3 parts by weight were mixed to obtain a particulate water-absorbing agent composition (20). In the obtained particulate water-absorbing agent composition (20), the weight-average particle diameter was 295 μm, and the ratio of particles having a particle diameter of less than 106 μm was 5%.
% By weight.

Example 21 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 was used as a vegetable powder as bamboo skin (“Manufacturer: Van Co., Ltd. (Location: 1-9 Tsuda Kaigancho, Tokushima-shi)
8) Trade name: bamboo skin powder "was ground using a hammer mill. The water content of this ground bamboo skin powder was 7.
A pass product having a particle size of 300 μm was used at 0%. ) 1.0 part by weight and further 1.0 part by weight of ion-exchanged water were mixed to obtain a particulate water-absorbing agent composition (21). The obtained particulate water-absorbing agent composition (21) had a weight average particle size of 295 μm and 106 μm.
The proportion of particles less than 5% by weight.

Example 22 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 was used as a plant powder to extract coffee slag (“Sold by: Ajinomoto Co., Inc. (Location: 1-15 Kyobashi, Chuo-ku, Tokyo) -1) Maxim ORIGINAL / original (product name: regular coffee) "
The mixture was placed in 500 g of ion-exchanged water at 0 ° C., stirred for 1 hour, and filtered. The residue from the filtration (ie, the coffee extract residue) is reduced to 60
After drying under reduced pressure at ℃, it was ground using a hammer mill. The dry ground pulverized coffee extract used had a water content of 4.1% and a particle size of 850 μm. ) 1.0 part by weight and further 1.0 part by weight of ion-exchanged water were mixed to obtain a particulate water-absorbing agent composition (22). Obtained particulate water-absorbing composition (22)
Has a weight average particle diameter of 295 μm and a ratio of particles having a particle diameter of less than 106 μm is 5% by weight.

Example 23 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 was grape pomace (a commercially available fruit of Delaware) was pulverized as a plant powder with a mixer and filtered. This filter residue (ie grape residue)
Was dried at 60 ° C. under reduced pressure, and further pulverized using a hammer mill. The water content of the dried and ground grape residue is 7.
At 1%, a 500 μm particle size pass product was used. ) 0.5 part by weight and further 1.0 part by weight of ion-exchanged water were mixed to obtain a particulate water-absorbing agent composition (23). The obtained particulate water-absorbing agent composition (23) had a weight average particle diameter of 295 μm and 106 μm.
The proportion of particles less than 5% by weight.

Example 24 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 was used as a plant powder to extract leaves and seeds from persimmon (common persimmon (Japanese persimmon, Wakayama)). This was dried at 60 ° C. under reduced pressure, cut as finely as possible with scissors, and then ground with a hammer mill. And a particle size of 850 μm pass product was used.)
1.0 part by weight and further 1.0 part by weight of ion-exchanged water were mixed to obtain a particulate water absorbing agent composition (24). The obtained particulate water-absorbing composition (24) had a weight average particle size of 295 μm.
m, the proportion of particles smaller than 106 μm was 5% by weight.

[0115] Example 25 was dried under reduced pressure leaves mugwort (Artemisia as water-absorbent resin (2) plant powder 100 parts by weight obtained in Reference Example 2 at ground to 60 ° C. in a mixer,
Further, it was pulverized using a hammer mill. The mugwort powder used had a water content of 7.3% and a particle size of 300 μm. ) 1.0 part by weight, further mixed with ion-exchanged water, 1.0 part by weight was obtained particulate water-absorbing composition (25). The obtained particulate water-absorbing composition (25) has a weight average particle diameter of 360.
The ratio of particles having a particle diameter of μm or less than 106 μm was 4% by weight. Example 26 Water-absorbent resin (2) 1 obtained in Reference Example 2
Bamboo ("Manufacturer: Ban Co., Ltd. (Location: 1-98, Tsuda Kaigancho, Tokushima City), trade name: bamboo powder (bamboo powder)") was ground using a hammer mill to 00 parts by weight.
The water content of the ground bamboo powder is 7.9% and the particle size is 50%.
A 0 μm pass product was used. ), 1.0 part by weight of ion-exchanged water, and 1.0 part by weight of ion-exchanged water.
6) was obtained. The obtained particulate water absorbing agent composition (26)
The weight average particle diameter was 360 μm, and the ratio of particles having a particle diameter of less than 106 μm was 4% by weight.

Example 27 100% by weight of the water-absorbent resin (2) obtained in Reference Example 2 was cut as a vegetable powder ("Seller: Nagao Shokuhin Co., Ltd. I (location: 295, Nobesue, Himeji-shi, Hyogo)") Wakame (product name: dried wakame) "was cut as finely as possible with scissors, and then pulverized using a hammer mill. The pulverized wakame product had a water content of 9.5% and a particle size of 850 μm pass product was used. 0.0 part by weight and further 1.0 part by weight of ion-exchanged water were mixed to obtain a particulate water-absorbing agent composition (27). Obtained particulate water-absorbing composition (27)
Has a weight average particle diameter of 360 μm and a ratio of particles having a particle diameter of less than 106 μm is 4% by weight.

[Comparative Examples 1 to 31]
Table 2 summarizes the types of plant powder and additives. Tables 5 and 6 summarize various properties and deodorizing effects of the comparative particulate water-absorbing agent compositions (1 to 31). The comparative particulate water-absorbing agent composition (1
Table 7 summarizes some of the absorption performance evaluations of the comparative absorbent articles (1 to 31) including the above (31 to 31). Hereinafter, the method for producing the comparative absorbent compositions (1 to 31) will be described. [Comparative Example 1] The water absorbent resin (1) obtained in Reference Example 1 was
This was used as a comparative particulate water-absorbing composition (1). The comparative particulate water-absorbing agent composition (1) obtained had a weight average particle size of 295.
The ratio of particles having a particle diameter of μm or less than 106 μm was 6% by weight.

Comparative Example 2 A commercially available deodorant consisting of green tea extract in 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 (Flavonoid-B manufactured by Daiichi Kasei Sangyo Co., Ltd.)
0.5 part by weight was mixed to obtain a comparative particulate water-absorbing agent composition (2). In the obtained comparative particulate water-absorbing agent composition (2), the weight average particle diameter was 295 μm, and the ratio of particles having a particle diameter of less than 106 μm was 6% by weight. [Comparative Example 3] Water-absorbent resin (1) 10 obtained in Reference Example 1
10 parts by weight of a commercially available deodorant consisting of a green tea extract (Flavonoid-B manufactured by Daiichi Kasei Sangyo Co., Ltd.) was mixed with 0 parts by weight to obtain a comparative particulate water absorbing agent composition (3). In the obtained comparative particulate water-absorbing composition (3), the weight average particle diameter was 295 μm, and the ratio of particles having a weight average particle diameter of less than 106 μm was 3% by weight.
Met.

[Comparative Example 4] Pepper (white pepper pine manufactured by Takasago Spice Co., Ltd .; 100% by weight of water-absorbent resin (3) obtained in Reference Example 3; water content of 10.3% And particle size 300μ
An m-pass product was used. The volume average particle size is 77 μm. ) 0.
5 parts by weight were mixed by a dry blending method to obtain a comparative particulate water absorbing agent composition (4). The obtained comparative particulate water-absorbing composition (4) had a weight average particle diameter of 360 μm,
The proportion of particles smaller than 6 μm was 5% by weight. [Comparative Example 5] Water-absorbent resin (4) 10 obtained in Reference Example 4
0 parts by weight of plant powder as parsley (produced by Yasuma Corporation)
Parsley Powder CP, This parsley powder CP used was a pass product having a water content of 6.7% and a particle size of 300 μm. The volume average particle diameter of 142μm. ) 0.5 parts by weight by dry blending, to obtain comparative particulate water-absorbing composition (5). In the obtained comparative particulate water-absorbing composition (5), the weight average particle diameter was 440 μm, and the ratio of particles having a particle diameter of less than 106 μm was 3% by weight.

[Comparative Example 6] Pepper (white pepper pine manufactured by Takasago Spice Co., Ltd .; 100% by weight of water-absorbent resin (5) obtained in Reference Example 5; And particle size 300μ
An m-pass product was used. ) 0.5 part by weight was mixed by a dry blending method to obtain a comparative particulate water-absorbing composition (6). In the obtained comparative particulate water-absorbing agent composition (6), the weight-average particle diameter was 295 μm, and the ratio of particles having a particle diameter of less than 106 μm was 6% by weight. Comparative Example 7 Water Absorbent Resin (5) 10 Obtained in Reference Example 5
0 parts by weight of plant powder as parsley (produced by Yasuma Corporation)
Parsley Powder CP, This parsley powder CP used was a pass product having a water content of 6.7% and a particle size of 300 μm. ) 0.5
The parts by weight were mixed by a dry blend method to obtain a comparative particulate water-absorbing agent composition (7). The obtained comparative particulate water-absorbing composition (7) had a weight average particle diameter of 295 μm,
The proportion of particles smaller than μm was 6% by weight.

Comparative Example 8 100 parts by weight of the water-absorbent resin (3) obtained in Reference Example 3 was mixed with green tea as a plant powder (“Distributor: Nishie Co., Ltd. (Location: 1 Kakiuchi-Kitamachi, Aboshi-ku, Himeji-shi
652-3) Raw material name: "green tea" was pulverized using a hammer mill. This pulverized green tea used was a pass product having a water content of 2.0% and a particle size of 850 m. The volume average particle diameter was 287 m.
m. ) 0.5 parts by weight were mixed by a dry blending method to obtain a comparative particulate water absorbing agent composition (8). The obtained comparative particulate water-absorbing composition (8) had a weight average particle diameter of 360 μm.
m, the proportion of particles smaller than 106 μm was 5% by weight.

Comparative Example 9 A dried product of green tea extract slag as a plant powder was added to 100 parts by weight of the water-absorbent resin (4) obtained in Reference Example 4 (“Distributor: Nishie Co., Ltd. (Location: Aboshi-ku, Himeji-shi) 1652-3 Kakiuchi-Kitamachi Raw material name: green tea "10 g was put into 500 g of ion-exchanged water at about 95 ° C, mixed and filtered after 5 minutes.
After drying under reduced pressure at ℃, it was ground using a hammer mill. The dried and ground green tea extract residue has a moisture content of 6.3% and a particle size of 8%.
A 50 μm pass product was used. Volume average particle size is 346μ
m. ) 0.5 part by weight was mixed by a dry blending method to obtain a comparative particulate water-absorbing agent composition (9). The obtained comparative particulate water-absorbing composition (9) had a weight average particle size of 4
The ratio of particles having a particle diameter of 40 μm or less than 106 μm was 3% by weight.

Comparative Example 10 100 parts by weight of the water-absorbent resin (5) obtained in Reference Example 5 was mixed with green tea as a plant powder (released by: Nishie Co., Ltd.
652-3) Raw material name: green tea, particle size 600 of this green tea
A μm pass product was used. ) 50 parts by weight were mixed by a dry blending method to obtain a comparative particulate water absorbing agent composition (10). The obtained comparative particulate water-absorbing composition (10) had a weight-average particle diameter of 295 μm, and the proportion of particles having a particle diameter of less than 106 μm was 8% by weight. [Comparative Example 11] Water-absorbing resin (5) 1 obtained in Reference Example 5
Peel the mandarin peel (a commercially available mandarin peel (from Arita)) as a plant powder in 00 parts by weight, pulverize the peel with a mixer, dry at 60 ° C under reduced pressure, and further pulverize using a hammer mill. (The dried pulverized citrus peel had a moisture content of 4.5%, and a 850 μm particle size pass product was used.)
0.5 part by weight and further 1.0 part by weight of ion-exchanged water were mixed to obtain a comparative particulate water-absorbing composition (11). In the obtained comparative particulate water-absorbing agent composition (11), the weight-average particle diameter was 295 μm, and the ratio of particles having a particle diameter of less than 106 μm was 5% by weight.
Met.

[Comparative Example 12] 100 parts by weight of the water-absorbent resin (5) obtained in Reference Example 5 was grape pomace (a commercially available fruit of Delaware) was pulverized as a plant powder with a mixer and filtered. This filter residue (ie grape residue)
Was dried at 60 ° C. under reduced pressure, and further pulverized using a hammer mill. The water content of the dried and ground grape residue is 7.
At 1%, a 500 μm particle size pass product was used. ) 0.5 part by weight and further 1.0 part by weight of ion-exchanged water were mixed to obtain a comparative particulate water-absorbing agent composition (12). The obtained comparative particulate water-absorbing composition (12) had a weight average particle size of 295 μm.
m, the proportion of particles smaller than 106 μm was 4% by weight.

Comparative Example 13 100 parts by weight of the water-absorbent resin (5) obtained in Reference Example 5 was used as a vegetable powder to extract leaves and seeds from persimmon (common persimmon (Japanese persimmon, Wakayama)). This was dried at 60 ° C. under reduced pressure, cut as finely as possible with scissors, and then ground with a hammer mill. And a particle size of 850 μm was used.)
1.0 part by weight and further 1.0 part by weight of ion-exchanged water were mixed to obtain a comparative particulate water-absorbing agent composition (13). In the obtained comparative particulate water-absorbing agent composition (13), the weight average particle diameter was 295 μm, and the proportion of particles having a particle diameter of less than 106 μm was 5% by weight.
Met.

[Comparative Example 14] 1.5 parts by weight of cellulose powder (KC Floc W-200G manufactured by Nippon Paper Industries) was mixed with 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 by a dry blending method. Thus, a comparative particulate water-absorbing agent composition (14) was obtained. The obtained comparative particulate water-absorbing composition (14) had a weight average particle diameter of 295 μm and 106 μm.
The proportion of particles less than 8% by weight. [Comparative Example 15] Water-absorbing resin (1) 1 obtained in Reference Example 1
100 parts by weight of cellulose powder (K manufactured by Nippon Paper Industries Co., Ltd.
C-floc W-400G) 1.5 parts by weight were mixed by a dry blend method, and the comparative particulate water-absorbing agent composition (15)
I got Obtained comparative particulate water-absorbing composition (15)
Has a weight average particle diameter of 295 μm and a ratio of particles having a particle diameter of less than 106 μm is 8% by weight.

Comparative Example 16 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 was mixed with 20 parts by weight of a cellulose powder (KC Floc W-400G manufactured by Nippon Paper Co., Ltd.) by a dry blending method. A comparative particulate water absorbing agent composition (16) was obtained. In the obtained comparative particulate water-absorbing agent composition (16), the weight-average particle diameter was 260 μm, and the ratio of particles having a weight average particle diameter of less than 106 μm was 24% by weight. [Comparative Example 17] Water-absorbing resin (1) 1 obtained in Reference Example 1
To 100 parts by weight, 1.0 part by weight of activated carbon (Shirasagi C, manufactured by Takeda Pharmaceutical Co., Ltd.) was mixed by a dry blend method to obtain a comparative particulate water-absorbing agent composition (17). The obtained comparative particulate water-absorbing composition (17) had a weight average particle size of 29.
The ratio of particles having a particle diameter of 5 μm or less than 106 μm was 7% by weight.

Comparative Example 18 To 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1, 1.0 part by weight of tannic acid (Hi-tannic acid manufactured by Dainippon Pharmaceutical Co., Ltd.) Deodorant (Mizukanite H manufactured by Mizusawa Chemical Industry Co., Ltd.)
P) 1.0 part by weight was mixed to obtain a comparative particulate water-absorbing composition (18). In the obtained comparative particulate water-absorbing agent composition (18), the weight-average particle diameter was 295 μm, and the ratio of particles having a weight average particle diameter of less than 106 μm was 8% by weight. [Comparative Example 19] Water-absorbing resin (1) 1 obtained in Reference Example 1
1.0 part by weight of a commercially available deodorant (flavonoid-B manufactured by Dai-ichi Kasei Sangyo Co., Ltd.) composed of green tea extract in 00 parts by weight and a silicate mineral deodorant (manufactured by Mizusawa Chemical Industry Co., Ltd.)
(Mizukanite HP) 1.0 part by weight was mixed to obtain a comparative particulate water-absorbing agent composition (19). The obtained comparative particulate water-absorbing composition (19) had a weight average particle size of 295 μm,
The proportion of particles smaller than 106 μm was 8% by weight.

[Comparative Example 20] 1.0 part by weight of tannic acid (Hi-tannic acid manufactured by Dainippon Pharmaceutical Co., Ltd.) and 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 Deodorant (Mizukanite H manufactured by Mizusawa Chemical Industry Co., Ltd.)
P) 9.0 parts by weight were mixed to obtain a comparative particulate water-absorbing agent composition (20). In the obtained comparative particulate water-absorbing composition (20), the weight average particle diameter was 290 μm, and the ratio of particles having a particle diameter of less than 106 μm was 11% by weight. [Comparative Example 21] Water-absorbing resin (1) 1 obtained in Reference Example 1
2 parts by weight of a deodorant (Isohiba 82 manufactured by Shimizu Port Refining Co., Ltd.) carrying an extract of coniferous tree were mixed with 00 parts by weight to obtain a comparative particulate water absorbing agent composition (21). The obtained comparative particulate water-absorbing composition (21) had a weight average particle size of 29.
The ratio of particles having a particle diameter of 5 μm or less than 106 μm was 8% by weight.

Comparative Example 22 0.4 parts by weight of a commercially available hiba oil was mixed with 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1, and a comparative particulate water-absorbing agent composition ( 2
2) was obtained. The obtained comparative particulate water-absorbing agent composition (2
In 2), the weight average particle diameter was 295 μm, and the ratio of particles having a particle diameter of less than 106 μm was 6% by weight. [Comparative Example 23] Water-absorbing resin (1) 1 obtained in Reference Example 1
To 100 parts by weight of the extract, 100 parts by weight of a deodorant carrying an extract of coniferous tree (Isohiba 82 manufactured by Shimizu Port Refining Co., Ltd.) was mixed to obtain a comparative particulate water absorbing agent composition (23). In the obtained comparative particulate water-absorbing agent composition (23), the ratio of particles having a weight average particle diameter of 205 μm and less than 106 μm was 45% by weight.

Comparative Example 24 20 parts by weight of a commercially available hiba oil was mixed with 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1, and the comparative particulate water-absorbing agent composition (2
4) was obtained. [Comparative Example 25] Water absorbent resin (1) 1 obtained in Reference Example 1
Rosemary 0.4 generally available in the amount of 00 parts by weight
The parts by weight were mixed to obtain a comparative particulate water-absorbing agent composition (25). The obtained comparative particulate water absorbing agent composition (25)
The ratio of the particles having a weight average particle diameter of 295 μm and less than 106 μm was 6% by weight.

Comparative Example 26 10 parts by weight of a commercially available rosemary was mixed with 100 parts by weight of the water-absorbent resin (1) obtained in Reference Example 1 to obtain a comparative particulate water-absorbing composition (26). I got In the obtained comparative particulate water-absorbing composition (26), the weight-average particle diameter was 295 μm, and the ratio of particles having a particle diameter of less than 106 μm was 5% by weight. Comparative Example 27 100 parts by weight of konjac powder as a water-absorbent resin and ginger as a plant powder (Ginger pine manufactured by Takasago Spice Co., Ltd.
A pass product having a particle size of 300 μm was used at 1%. ) 0.5 parts by weight were mixed by a dry blend method to obtain a comparative particulate water-absorbing composition (27). The obtained comparative particulate water-absorbing composition (27) had a weight average particle size of 220 μm,
The proportion of particles smaller than 6 μm was 4% by weight.

[Comparative Example 28] 100 parts by weight of konjac flour as a water-absorbent resin and black tea as a plant powder (“Seller: Nippon Lever PT. (Location: 2- Shibuya, Shibuya-ku, Tokyo, Tokyo)
22-3) Product name: Lipton YELLOW L
ABEL "was pulverized using a hammer mill. This pulverized black tea had a water content of 6.8% and a particle size of 600 μm was used. The comparative particulate water-absorbing agent composition (28) obtained had a weight average particle diameter of 220 μm and a ratio of particles having a particle diameter of less than 106 μm of 4% by weight.
Met.

[Comparative Example 29] Ginger (Ginger pine manufactured by Takasago Spice Co., Ltd.) was used as a vegetable powder in 100 parts by weight of Noniolex NA-150M (manufactured by Showa Denko KK) as a water-absorbing resin.
A pass product having a particle size of 300 μm was used at 1%. ) 0.5 part by weight were mixed by a dry blending method to obtain a particulate water-absorbing composition (29) comparison. The obtained comparative particulate water-absorbing composition (29) had a weight average particle size of 490 μm,
The proportion of particles smaller than 6 μm was 2% by weight. [Comparative Example 30] Noniolex NA- as a water absorbent resin
100M parts by weight of 150M (manufactured by Showa Denko KK) as a plant powder as black tea (“Seller: Nippon Lever Corporation PT (Location: 2-22-3, Shibuya, Shibuya-ku, Tokyo) Product name: Li
pton YELLOW LABEL "was ground using a hammer mill. This ground black tea had a moisture content of 6.8%.
A pass product having a particle size of 600 μm was used. ) 0.5 parts by weight were mixed by a dry blending method to obtain a comparative particulate water-absorbing agent composition (30). The comparative particulate water-absorbing agent composition (30) obtained had a weight average particle diameter of 490 μm and 106 μm.
The proportion of particles smaller than m was 2% by weight.

[Comparative Example 31] 100 parts by weight of Noniolex NA-150M (manufactured by Showa Denko KK) as a water-absorbing resin and kelp as a plant powder (“Manufacturer: Maruzen Naya Shoten Co., Ltd. (Location: 28, Shinkawacho, Hakodate-shi, Hokkaido) No. 1)
(Product name: Hidaka Kizami Young Kombu) was cut as finely as possible with scissors, and then pulverized using a hammer mill. The pulverized kelp product had a water content of 9.9% and a particle size 850 μm pass product was used.) Was mixed by dry blending to obtain a comparative particulate water-absorbing composition (31), which had a weight-average particle diameter of 490 μm. The proportion of particles smaller than 106 μm was 2% by weight.

[0136]

[Table 1]

[0137]

[Table 2]

[0138]

[Table 3]

[0139]

[Table 4]

[0140]

[Table 5]

[0141]

[Table 6]

[0142]

[Table 7]

[0143]

The particulate water-absorbing agent composition of the present invention can impart a deodorizing function to an absorbent article, and is a novel particulate water-absorbing agent composition exhibiting excellent deodorizing performance and excellent absorption characteristics over a long period of time. Things. Although the cause is not clear, it is included in the plant powder when it comes into contact with urine because the plant powder is given only to the absorbent resin having a specific absorption capacity, suction force under pressure and absorption speed, and is included. It is considered that the optimal balance between the action of the active ingredient and the amount of absorbed liquid has been achieved. In addition, the absorbent article of the present invention includes the particulate water-absorbing agent composition of the present invention and can impart excellent deodorizing performance.Therefore, paper diapers, sanitary napkins, adult incontinence pads, adult diapers, and the like. It can be particularly suitably used for sanitary materials and the like, and since gel stability is imparted, excellent wearing feeling can be maintained for a long time.

[Brief description of the drawings]

FIG. 1 is a schematic cross-sectional view of a measuring device used for measuring a suction force under pressure, which is one of the properties exhibited by a water-absorbent resin.

[Explanation of symbols]

 Reference Signs List 1 container 2 filter paper 3 measuring unit 4 artificial urine 5 support cylinder 6 wire mesh 7 weight

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification code FI Theme coat ゛ (Reference) A61F 13/53 A61F 5/44 H B01J 20/24 A41B 13/02 ND C08L 97/02 A61F 13/18 382 // A61F 5/44 307B (72) Inventor Yoshio Irie 992, Nishioki, Akihama-ku, Abashiri-ku, Himeji-shi, Hyogo Prefecture 1 Nippon Shokubai Co., Ltd. F-term (reference) 3B029 BD22 BF03 4C003 AA24 HA03 4C098 AA09 CC01 CC19 DD05 DD21 DD23 DD27 4G066 AC07B AC17C BA09 CA02 CA22 CA24 CA29 CA43 DA12 DA13 EA05 FA37 4J002 AH002 BE021 BF021 BG011 BG101 BG131 BH021 BN011 GD02 GD03

Claims (15)

[Claims] 1. A plant powder and a water-absorbent resin having a surface portion and / or its vicinity surface-treated with a cross-linking agent,
A particulate water-absorbing agent composition having a malodor removal index represented by the following formula of 180 or more. Odor removal index = 1.1 x hydrogen sulfide removal rate + 2.0 x methyl mercaptan removal rate + 0.3 x ammonia removal rate 2. The plant powder is a vascular plant powder.
The particulate water-absorbing agent composition according to claim 1. 3. The vascular plant according to claim 1, wherein the vascular plant is Gramineae, Aceraceae, Antrodiaceae, Birchaceae, Asteraceae, Lamiaceae, Cedaraceae, Apiaceae, Rosaceae, Grapeaceae, Cypressaceae, Pinaceae, Fagaceae, The particulate form according to claim 2, which is at least one vascular plant selected from Brassicaceae, Legumes, Rutaceae, Cucurbitaceae, Solanaceae, Pepperaceae, Gingeraceae, Camphoraceae, Malvaceae, Camellia family. Water absorbing agent composition. 4. The particulate water-absorbing composition according to claim 1, wherein the plant powder is a spice. 5. The spice has a volume average particle size of 850 μm.
The particulate water-absorbing agent composition according to claim 4, which is as follows. 6. The particulate water-absorbing agent composition according to claim 1, wherein the plant powder is tea leaves and / or tea leaves extract. 7. The particulate water-absorbing agent composition according to claim 6, wherein the volume average particle diameter of the tea leaves and / or tea leaf extract residue is 500 μm or less. 8. A water-absorbent resin having a solid content of 100 parts by weight,
The particulate water-absorbing composition according to any one of claims 1 to 7, wherein the amount of the plant powder is in the range of 0.001 to 20 parts by weight. 9. The particulate water-absorbing composition has an absorption capacity of 25 g / g.
The particulate water-absorbing composition according to any one of claims 1 to 8, wherein the composition has a suction index under pressure of 14 g / g or more and an absorption rate of 60 seconds or less. 10. A plant powder and a water-absorbent resin, having an absorption capacity of 25 g / g or more and 60 g / g or less, a suction index under pressure of 14 g / g or more, and an absorption rate of 60 seconds or less, represented by the following formula. A particulate water-absorbing agent composition having an odor removal index of 180 or more. Odor removal index = 1.1 x hydrogen sulfide removal rate + 2.0 x methyl mercaptan removal rate + 0.3 x ammonia removal rate 11. The method according to claim 1, which is used for sanitary materials.
The particulate water-absorbing composition according to any one of the above. 12. Particles comprising adding a plant powder to a water-absorbent resin having an absorption capacity of 25 g / g or more and 60 g / g or less, a suction force under pressure of 9 g / g or more, and an absorption speed of 60 seconds or less. A method for producing a water-absorbing agent composition. 13. An absorbent comprising an absorbent layer containing the particulate water-absorbing agent composition according to any one of claims 1 to 11, a liquid-permeable top sheet, and a liquid-impermeable back sheet. Goods. 14. An absorbent body comprising a hydrophilic fiber, a plant powder and a water-absorbent resin, wherein the absorbent is represented by the following formula as a particulate water-absorbent composition obtained by mixing the plant powder and the water-absorbent resin. An absorber having a malodor removal index of 180 or more. Odor removal index = 1.1 x hydrogen sulfide removal rate + 2.0 x methyl mercaptan removal rate + 0.3 x ammonia removal rate 15. The absorber according to claim 14, wherein said plant powder contains a particulate water-absorbing agent composition supported on said water-absorbing resin.