JP4129390B2 - Method for producing deodorant absorber - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method of manufacturing absorbent bodies used in antimicrobial and deodorant both the body fluid absorbent product article combines.
[0002]
[Prior art]
Recently, techniques for imparting deodorant and antibacterial properties to paper diapers and sanitary napkins have been proposed. For example, JP-A-8-176338 (Patent Document 1) discloses an absorbent article in which zeolite is dispersed inside the particles of an absorbent resin.
[0003]
JP-A-7-265397 (Patent Document 2) discloses an absorber using a polyester fiber containing silver-supported zeolite powder.
[0004]
On the other hand, in Japanese Patent Application Laid-Open No. 12-79159 (Patent Document 3), a compound having an antibacterial function against a water-absorbing resin and an ammonia-producing bacterium and neutralizing ability, or neutralizing ability and adsorbing ability with respect to ammonia. A powdery deodorant / antibacterial water-absorbing agent comprising a drug is disclosed.
[Patent Document 1]
JP-A-8-176338 [Patent Document 2]
Japanese Patent Laid-Open No. 7-265397 [Patent Document 3]
JP-A-12-79159 gazette
[Problems to be solved by the invention]
Although the thing of patent document 3 is preferable at the point which has both antibacterial property and deodorizing property, cost is high and it is not realistic when considering a disposable use.
[0006]
In this regard, although the one described in Patent Document 1 can be produced at low cost by pulverizing the absorbent resin as described in the same document, the zeolite is retained in a dispersed form inside the absorbent resin. The deodorizing ability was insufficient and the antibacterial function was also insufficient. On the other hand, the thing of patent document 2 kneads a deodorant zeolite particle to a fiber, and although it is effective, only the zeolite exposed to the resin fiber surface hardly exhibits a deodorizing effect. Furthermore, even those described in Patent Documents 1 and 2 are time-consuming to disperse and knead the zeolite particles, and cannot be easily manufactured at low cost.
[0007]
Therefore, a main object of the present invention, while having a high deodorizing property, is to provide a manufacturing method of inexpensively and easily Ru can be produced intake absorbent body.
[0008]
[Means for Solving the Problems]
The present invention that has solved the above problems is as follows.
[0009]
[0010]
[0011]
[0012]
[0013]
[0014]
[0015]
[0016]
[0017]
[0018]
[0019]
[0020]
[0021]
[0022]
<Invention of Claim 1 >
A pulp sheet is pulverized to obtain a pulverized pulp fiber, and the pulverized pulp fiber is used to produce an absorbent body having a predetermined shape in which a particulate superabsorbent polymer is sandwiched between pulp layers formed by stacking the pulverized pulp fiber. A method of manufacturing an absorbent body,
Prior to the pulverization, a slurry obtained by dispersing 1 to 2% by weight of deodorant particles composed of zeolite particles in water containing a thickener has a deodorant particle content of 0.1 to 10 per absorber. Spread on the pulp sheet so that the weight% .
The manufacturing method of the deodorant absorber characterized by the above-mentioned.
[0023]
(Function and effect)
In the present invention, the deodorant particles are not encapsulated in the resin and exhibit high deodorant properties. In addition, the presence form of such deodorant particles also has an advantage that it can be formed remarkably easily and inexpensively as compared with kneading into resin fibers or dispersing in absorbent resin.
A general absorber includes pulp fibers. In this case, after making the pulp fibers into a predetermined absorber shape, slurry can be applied from the surface thereof. On the other hand, it is needless to say that the deodorant particles are preferably contained uniformly in the planar direction of the absorber. In this case, application by slurry dispersion is preferable because it is easy and inexpensive. However, as long as the dispersion is performed, it is extremely difficult to make the amount of dispersion in the planar direction of the absorber uniform. Therefore, in the absorbent body production method of the present invention, the slurry containing deodorant particles is sprayed on the pulp sheet before pulverization, and the nonuniformity of the dispersion is eliminated by the mixing action during pulverization. Thus, an absorbent body in which the deodorant particles are not encapsulated in the resin can be manufactured easily and inexpensively.
[0024]
[0025]
[0026]
<Invention of Claim 2 >
By pulverizing pulp sheet to obtain pulverized pulp fiber, and using this pulverized pulp fiber, an absorbent body having a predetermined shape is produced by mixing pulverized pulp fiber with particulate superabsorbent polymer. There,
Prior to the pulverizing, the slurry comprising deodorant particles consisting of zeolite particles is 1-2% by weight dispersing in water, deodorant particle content per one absorber 0.1 containing thickener Sprinkle on the pulp sheet to be 10% by weight ,
The manufacturing method of the deodorant absorber characterized by the above-mentioned .
[0027]
(Function and effect)
By spraying the slurry having such a concentration at such a ratio, the sprayability is improved and the deodorizing property is also improved.
[0028]
<Invention of Claim 3 >
The method for producing a deodorant absorber according to claim 1 or 2 , wherein the deodorant particles are zeolite particles obtained by replacing some or all of ion-exchangeable ions in zeolite with silver ions.
[0029]
(Function and effect)
It is preferable to use zeolite particles obtained by substituting some or all of the ion-exchangeable ions in the zeolite with silver ions because not only the deodorizing effect but also the antibacterial effect is exhibited.
[0030]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail.
Body fluid absorbent article, body fluid permeable topsheet, a fluid impermeable back sheet, Ru Tei and a absorbent body interposed therebetween. Such a configuration is a well-known configuration common to most body fluid absorbent articles, but the present invention allows the deodorant particles to be present in the absorbent body in a form that is not contained in the resin. Otherwise, the deodorized particles may fall off or adhere to the wearer's skin or local area. Therefore, the general configuration is closely related to the characteristic configuration of the present invention. In addition, use of the conventional deodorant assumes the application not only to an absorber but to other articles | goods, and has taken the form generally included in resin.
[0031]
Front surface sheet is not limited in particular, from the simple consisting only of a perforated or nonporous nonwoven fabric or a porous plastic sheet (including mesh sheet), to those having a layered structure of a combination of these, preferred Can be used. From the viewpoint of containment of the deodorant particles, those having a pore diameter or fiber gap as small as possible, particularly smaller than the deodorant particles, are preferably used.
[0032]
The material fibers constituting the nonwoven fabric used for the topsheet are, for example, synthetic fibers such as olefins such as polyethylene or polypropylene, polyesters and polyamides, recycled fibers such as rayon and cupra, and natural fibers such as cotton. Nonwoven fabric obtained by an appropriate processing method such as spunlace nonwoven fabric, spunbond nonwoven fabric, thermal bond nonwoven fabric, melt blown nonwoven fabric, needle punch nonwoven fabric, and air-through nonwoven fabric can be used. Among these processing methods, the spunlace method is excellent in terms of flexibility and drapeability, and the thermal bond method is excellent in terms of being bulky and soft.
[0033]
The back surface sheet, the sheet material having at least impermeability such as an olefin resin sheet such as polyethylene and polypropylene is preferably used. As the other leak-proof sheet, a laminated nonwoven fabric obtained by laminating a nonwoven fabric on a polyethylene sheet or the like, or a nonwoven fabric sheet that is substantially impermeable to liquid with a waterproof film interposed therebetween can be used. In this case, a leak-proof sheet is composed of the waterproof film and the nonwoven fabric. Moreover, in order to make the texture of the outer surface (exterior) high quality, it is possible to adopt a two-layer laminated form in which the non-woven fabric is positioned on the outer surface side of the product and the polyethylene sheet is positioned on the inner surface side of the product. Furthermore, in recent years, leak-proof sheets having moisture permeability tend to be used from the viewpoint of preventing stuffiness. The water- and moisture-permeable sheet material is a microporous sheet obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. There is.
[0034]
Intake absorbent body is one obtained by mixing a particulate superabsorbent polymer to those or fluff pulp fibers formed by interposing a superabsorbent polymer particulate of the pulp layers consisting of pulp fibers, pulp fibers As will be described later, a slurry obtained by dispersing deodorant particles in water containing a thickener is dispersed on a pulp sheet, and then the pulp sheet is pulverized. Pulp includes cellulose fibers such as chemical pulp and dissolved pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate. Softwood pulp with a longer fiber length is more functional and price than hardwood pulp. It is preferably used in terms of
[0035]
The deodorant particles of the present invention peptidase zeolite particles are used. In particular, zeolite particles obtained by substituting some or all of ion-exchangeable ions in zeolite with silver ions are particularly suitable because they have not only deodorizing properties but also antibacterial properties (hereinafter referred to as antibacterial deodorizing methods). Called zeolite particles). As the zeolite, either natural or synthetic zeolite can be used, but synthetic zeolite is preferable from the viewpoint of cost and availability. Zeolites are aluminosilicates having a three dimensional skeletal structure represented by general formula _{aM 2 / n 0 · xAl 2} O 3 · ySiO 2 · zH 2 O. In the formula, a, x, y, and z are integers representing the numbers of metal oxide, aluminum oxide, silicon oxide, and crystal water, respectively. M is a cation. The antibacterial and deodorant zeolite particles contain at least silver ions as M. Examples of other cation types include zinc, alkali metal (sodium ion, potassium ion), alkaline earth metal (calcium ion, magnesium ion), ammonium ion, and the like. As the cation M, those containing silver ions and zinc ions are suitable. N in the above general formula is the valence of the cation. The ratio of x: y is not particularly limited, but is usually 1: 1 to 1:10, preferably about 1: 2 to 1: 5. Moreover, there is no restriction | limiting in particular regarding z showing the number of crystal waters in the said general formula. Specific examples of zeolite include, for example, A-type zeolite, X-type zeolite, Y-type zeolite, T-type zeolite, high-silica zeolite, etc., and A-type zeolite, X-type zeolite, and Y-type in that the deodorizing effect is excellent. Zeolite is preferable, and A-type zeolite is particularly preferable.
[0036]
The particle size of the deodorant particles is not particularly limited, but the stability of the deodorant effect, the dispersibility and retention in the absorber, and the dispersibility in the slurry when slurry dispersion described below is performed. From the viewpoint of sprayability, those having an average particle size of usually 0.1 to 10 μm, preferably 0.3 to 5 μm, particularly preferably 0.6 to 2.5 μm can be used. If the average particle size is too small, powder handling becomes difficult, and if the average particle size is too large, the deodorizing effect decreases due to the decrease in surface area.
[0037]
Further, the pore diameter of the porous deodorant particles such as zeolite is usually 1 to 10 angstroms, particularly preferably 3 to 10 angstroms from the viewpoint of the deodorizing effect. If the pore size is too large, the deodorizing effect is reduced due to the reduction of the surface area.
[0038]
As the antibacterial and deodorant zeolite particles, Zeomic (registered trademark) manufactured by Sinanen Zeomic Co., Ltd. can be used. Zeomic includes master batches, powders, slurries, and natural products, which can be appropriately selected and used as they are, or pulverized and slurried as necessary.
[0039]
The spray slurry of the present invention is obtained by dispersing deodorant particles in a mother liquor composed of water containing a thickener. When the deodorant particles are obtained in a powder form, they can be used by dispersing them in a mother liquor in advance or immediately before spraying. Moreover, when obtaining as a slurry which disperse | distributed deodorant particle | grains in a mother liquid, this can be used as a spreading | diffusion slurry of this invention as it is or it can dilute to a suitable density | concentration. For example, the above-mentioned zeomic can be obtained as a slurry having a solid content of 20% by weight and a mother liquor (water and thickener) of 80% by weight, but this can be diluted 10 to 20 times with water to improve the sprayability. Can be used.
[0040]
Absorbent containing deodorant particles absorbs powdered deodorant particles as they are or as a slurry after sandwiching the molded pulp fiber into a predetermined shape and before sandwiching the molded absorber between the top sheet and the back sheet Although it can also be produced by applying it to the body by spraying or the like, and it is preferable in terms of low cost and easy, in this case, it is difficult to uniformly apply the deodorant particles in the plane direction of the absorber. Therefore, in the present invention, a slurry obtained by dispersing an odor eliminating particle in water containing a thickener in a pulp sheet before pulverization, while employing an absorbent body mainly composed of pulverized pulp fibers obtained by pulverizing a pulp sheet. To disperse. In this case, the non-uniformity of dispersion is eliminated by the mixing action at the time of grinding. In this case, the pulverized pulp fiber can be further stirred.
[0041]
The amount of deodorant particles used can be appropriately determined according to the performance of the deodorant particles, the type and size of the absorbent article, and the target absorption performance (for example, increasing the amount used in adult diapers). In general, it is preferable to contain 0.1 to 10% by weight of deodorant particles per absorber, and particularly in the case of disposable diapers, 0.02 to 2.0% by weight of deodorant per product. It is preferable to contain particles. In the case where the slurry containing deodorized particles is applied to the pulp sheet as described above, the slurry containing 1 to 2% by weight of the deodorized particles with respect to the dispersion mother liquor is applied to the spray surface of the pulp sheet by spraying or the like. Recommend.
[0042]
On the other hand, the absorbent body produced according to the present invention can be applied to any type as long as it has an absorbent body, and can be applied to, for example, a paper diaper, an incontinence pad, a sanitary napkin, a panty liner, a breast milk pad, and the like. .
[0043]
【The invention's effect】
As described above, according to the present invention, an absorbent body having a high deodorizing property can be produced inexpensively and easily, and a stable and high-quality body fluid absorbent article can be provided.

Claims (3)

A pulp sheet is pulverized to obtain a pulverized pulp fiber, and a pulverized pulp fiber is used to produce an absorbent body having a predetermined shape in which a particulate superabsorbent polymer is sandwiched between pulp layers obtained by stacking the pulverized pulp fiber. A method of manufacturing an absorbent body,
Prior to the pulverization, a slurry obtained by dispersing 1 to 2% by weight of deodorant particles made of zeolite particles in water containing a thickener has a deodorant particle content of 0.1 to 10 per absorber. Spread on the pulp sheet so that the weight% .
The manufacturing method of the deodorant absorber characterized by the above-mentioned. By pulverizing pulp sheet to obtain pulverized pulp fiber, and using this pulverized pulp fiber, an absorbent body having a predetermined shape is produced by mixing pulverized pulp fiber with particulate superabsorbent polymer. There,
Prior to the pulverizing, the slurry comprising deodorant particles consisting of zeolite particles is 1-2% by weight dispersing in water, deodorant particle content per one absorber 0.1 containing thickener Sprinkle on the pulp sheet to be 10% by weight ,
The manufacturing method of the deodorant absorber characterized by the above-mentioned . The method for producing a deodorant absorber according to claim 1 or 2 , wherein the deodorant particles are zeolite particles obtained by substituting part or all of ions capable of ion exchange in zeolite with silver ions.