JP2004244789A - Deodorant antibacterial fiber product - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a deodorant antibacterial fiber product having a high deodorant antibacterial effect, even when a small amount of a substance having deodorant and antibacterial action is applied to a fiber material. <P>SOLUTION: This deodorant antibacterial fiber product is formed by applying particles of a cancrinite-based mineral which contains a metal having antibacterial properties to the fiber material, wherein the cancrinite-based mineral is expressed by composition formula: aM<SB>2</SB>O-Al<SB>2</SB>O<SB>3</SB>-bSiO<SB>2</SB>-cR<SB>m</SB>Q<SB>n</SB>-dH<SB>2</SB>O (M expresses one or more kinds selected from a group comprising Na, K, and H; R expresses one or more kinds selected from a group comprising Na, K, Ca, and Mg; Q expresses one or more kinds selected from a group comprising CO<SB>3</SB>, SO<SB>4</SB>, NO<SB>3</SB>, OH, and Cl; and small letters (a) to (d), (m) and (n) satisfy the following inequalities: 0<a≤1, 1≤b≤50, 0<c≤2, d≥0, 1≤m≤2, and 1≤n≤2) and a part of M in the formula is substituted by the metal having the antibacterial properties. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

  The present invention relates to a deodorant antibacterial fiber product containing a cancrinite-like mineral. Further, the present invention relates to an absorbent article provided with the deodorant antibacterial fiber product.

  BACKGROUND ART Various sheet materials utilizing the adsorption performance of activated carbon have been conventionally known. For example, Patent Literature 1 describes an activated carbon-containing pulp sheet containing activated carbon fine particles and applicable to various deodorizing applications. However, this sheet has no antibacterial effect. In addition, there is a drawback that activated carbon easily falls off.

  Various zeolites are known as substances having an antibacterial action in addition to a deodorizing action. As one of the methods for supporting the zeolite on the sheet, there is a method of kneading the resin into the resin used. However, efficiency is poor because only a part of the zeolite is exposed on the surface. On the other hand, when adhering to the surface of a sheet, zeolite has poor adhesion to fibrous materials such as pulp, so it is difficult to carry a large amount of the zeolite on a sheet made of fibrous materials such as wet papermaking. Also, even if it is blended in a large amount, an efficient deodorant antibacterial effect cannot be exhibited. Conversely, even if the amount is small, the deodorant antibacterial effect cannot be effectively exhibited.

JP-A-9-173429

Accordingly, an object of the present invention is to provide a deodorant antibacterial fiber product having a high deodorant antibacterial effect even when the amount of a substance having a deodorant and antibacterial action on a fiber material is small.
Another object of the present invention is to provide an absorbent article having a deodorizing and antibacterial action.

  The present invention has achieved the above object by providing a deodorant antibacterial fiber product obtained by adhering particles of a cancrinite-like mineral containing a metal having antibacterial properties to a fiber material.

  Further, the present invention provides a sheet-like form between the liquid-permeable top sheet and the liquid-retentive absorber, the absorber, or between the absorber and the liquid-impermeable backsheet. An absorbent article provided with the deodorant antibacterial fiber product of the present invention.

  In the deodorant antibacterial fiber product of the present invention, a metal-substituted cancrinite-like mineral that is a substance having a deodorant and antibacterial action can adhere to a fiber material in a large amount. Extremely high. Even if the amount of the metal-substituted cancrinite-like mineral is small, the deodorizing ability and antibacterial ability are sufficiently high. Therefore, in the absorbent article provided with the deodorant antibacterial fiber product of the present invention, the generation of offensive odor and the generation of various germs due to the excrement are effectively prevented.

Hereinafter, the present invention will be described based on preferred embodiments. The deodorant antibacterial agent used in the deodorant antibacterial fiber product of the present invention comprises a cancrinite-like mineral containing a metal having antibacterial properties (hereinafter, this is referred to as a metal-substituted cancrinite-like mineral). A cancrinite-like mineral (hereinafter, referred to as a precursor) that is a precursor of a metal-substituted cancrinite-like mineral has a structure similar to an aluminosilicate-based compound, and is represented by the following composition formula (1). You.
_{aM 2 O · Al 2 O 3} · bSiO 2 · cR m Q n · dH 2 O (1)
In the formula, M is one or more selected from the group consisting of Na, K and H, R is one or more selected from the group consisting of Na, K, Ca and Mg, and Q is CO ₃ , SO ₄ , At least one selected from the group consisting of NO ₃ , OH and Cl. a satisfies 0 <a ≦ 1, b satisfies 1 ≦ b ≦ 50, c satisfies 0 <c ≦ 2, d satisfies d ≧ 0, m satisfies 1 ≦ m ≦ 2, and n satisfies 1 ≦ n ≦ 2.

The metal-substituted cancrinite-like mineral corresponds to the one in which a part of M in the composition formula (1) is substituted with a metal having antibacterial properties. Therefore, when a metal having antibacterial properties is represented by D, the metal-substituted cancrinite-like mineral is represented by aM ₂ O in the composition formula (1) in which a ₁ D ₂ O · a ₂ M ₂ O (where , A ₁ + a ₂ = a).

  The kind of the metal having antibacterial properties is not particularly limited, but it is preferable to use, for example, Ag, Cu or Zn from the viewpoint of high antibacterial properties. The amount of the metal having antibacterial properties in the metal-substituted cancrinite-like mineral is 0.1 to 30% by weight, particularly 0.1 to 10% by weight, from the viewpoints of desired deodorant ability and antibacterial ability and economy. Preferably, there is. The amounts of these metals can be measured by X-ray fluorescence. Among metals having antibacterial properties, it is preferable to use Ag from the viewpoints of particularly high antibacterial properties and good adhesion to fiber materials.

  Metal-substituted cancrinite-like minerals have a wide deodorant spectrum and have various odors, for example, alkaline odors such as ammonia, amines and pyridine, acidic odors such as lower fatty acids and mercaptans, and neutral odors such as esters, ketones and aldehydes. It has been found by the present inventors that they have a good deodorizing action against the malodor composed of Moreover, it turned out that it shows high antibacterial activity. In other words, it has been found that the metal-substituted cancrinite-like mineral exhibits a high deodorizing and antibacterial action even when its amount is small. In addition, the particles of the metal-substituted cancrinite-like mineral have a tetrapod-like, confetti-like, or chestnut-like shape, and it has also been found that due to the shape, the adhesion to fiber materials such as pulp is extremely good. . Therefore, a large amount of metal-substituted cancrinite-like mineral can be attached to the deodorant antibacterial fiber product of the present invention, and the fiber product exhibits extremely high deodorant and antibacterial properties. Of course, even when the amount of adhesion is small, the fiber product exhibits sufficiently high deodorizing ability and antibacterial ability.

  It is preferable that aluminum contained in the metal-substituted cancrinite-like mineral is eluted by an acid and a part thereof is in an amorphous state. When aluminum is eluted, many micropores are formed in the metal-substituted cancrinite-like mineral, and the deodorizing ability is further enhanced. The elution of aluminum by acid will be described later.

Metal-substituted cancrinite-like mineral, a specific surface area of 70~800m ² / g, especially 80~600m ² / g, especially to be 100 to 500 m ² / g, a moderate deodorizing speed and broad deodorization spectrum It is preferable from the viewpoint of expression. The specific surface area is measured using Flowsorb 2300 (manufactured by Shimadzu Corporation). The sample is 0.1 g, and a mixed gas of N ₂ / He = 30/70 (volume ratio) is used as the adsorption gas.

The metal-substituted cancrinite-like mineral preferably has an acid amount of 20 meq / 100 g or more, particularly 100 meq / 100 g or more, especially 170 meq / 100 g or more, from the viewpoint of improving the deodorizing ability of alkaline malodorous gas. “Acid amount” refers to the total amount of acid sites of the metal-substituted cancrinite-like mineral. The acid amount was determined by stirring 0.5 g of a sample in 100 ml of a 0.01 mol / l NaOH aqueous solution for 1 hour, centrifuging the obtained sample suspension (10000 rpm × 5 minutes), and collecting 25 ml of the supernatant. The aliquot is titrated with 0.01 mol / l HNO ₃ to determine the amount of consumed NaOH, and the amount is calculated based on the obtained amount of NaOH.

  The metal-substituted cancrinite-like mineral preferably has an average particle diameter of 1 to 500 μm, more preferably 1 to 300 μm, and still more preferably 1 to 100 μm. Within such a range, an appropriate deodorizing speed can be obtained, and the handleability can be improved. The average particle diameter is measured at a refractive index of 1.16 using, for example, a laser / scattering type particle size distribution analyzer (LA-920, manufactured by Horiba, Ltd.).

In the precursor of the metal-substituted cancrinite-like mineral, that is, the cancrinite-like mineral represented by the composition formula (1), M is preferably Na and / or H from the viewpoint of high deodorizing ability and economy. It is. When M is composed of Na and H, aM ₂ O is represented by a ′ ₁ Na ₂ O · a ′ ₂ H ₂ O (where a ′ ₁ + a ′ ₂ = a). R is preferably Na from the same viewpoint as M. Q is preferably CO ₃ or NO ₃ from the viewpoint of easy control of particle morphology.

  a is preferably 0 <a ≦ 0.5, more preferably 0 <a ≦ 0.25, from the viewpoint of improving the deodorizing ability of the alkaline malodorous gas. b is preferably 1 ≦ b ≦ 40, more preferably 1 ≦ b ≦ 30, from the viewpoint of improving the deodorizing ability of acidic malodorous gas. c is preferably 0 <c ≦ 1, more preferably 0 <c ≦ 0.6, and even more preferably 0 <c ≦ 0.3, from the viewpoint of developing a high deodorizing ability. d is the content (molar ratio) of water contained in the precursor, and varies depending on the form in which the precursor is present, for example, in the form of a powder or slurry. m and n are arbitrarily determined by the combination of R and Q.

  The metal-substituted cancrinite-like mineral is formed by, for example, treating a raw material aluminosilicate with an acid to form a precursor, suspending the obtained precursor in water, and adding an aqueous solution of a water-soluble salt of an antibacterial metal thereto. It is preferably produced by ion exchange. As another method, it is also preferable to carry out ion exchange in the presence of a water-soluble salt of a metal having antibacterial properties during the acid treatment of the raw material aluminosilicate.

The raw material aluminosilicate is represented by the following composition formula (2).
_{wM 2 O · Al 2 O 3} · xSiO 2 · yR m Q n · zH 2 O (2)
In the formula, M, R, Q, m and n are the same as defined in the composition formula (1), w is 0.1 ≦ w ≦ 3, x is 0.2 ≦ x ≦ 6, and y is 0 <y ≦ 2 and z satisfy z ≧ 0. The method for producing the raw material aluminosilicate particles is not particularly limited. For example, a method in which an alumina raw material and a silica raw material are reacted in an alkaline solution in the presence of CO ₃ ²⁻ , SO ₄ ²⁻ , NO ₃ ⁻ , Cl ⁻ , etc. Is mentioned.

It is preferable to use a strong acid such as hydrochloric acid, sulfuric acid or nitric acid as the acid used for obtaining the precursor by subjecting the raw material aluminosilicate to acid treatment. In particular, it is preferable to use hydrochloric acid or nitric acid. The raw material aluminosilicate by acid treatment, is present in the pores of the material aluminosilicate M ₂ O and R _m Q _n not only eluting, Al also eluted portion to form a skeleton. As a result, the specific surface area, the pore volume, and the acid point are increased, and as described above, the finally obtained metal-substituted cancrinite-like mineral is in an amorphous state. The degree of the acid treatment may be appropriately adjusted so that the finally obtained metal-substituted cancrinite-like mineral has desired properties. The acid treatment is performed by gradually or once adding the aqueous solution containing the acid to the raw material aluminosilicate and bringing the acid into contact with the raw material aluminosilicate. The addition rate is preferably 0.01 to 100 ml / min, more preferably 0.1 to 10 ml / min, based on 100 g of the starting material aluminosilicate.

  The precursor obtained by the acid treatment of the raw material aluminosilicate is preferably aged at 60 to 150 ° C. for about 0.1 to 10 hours. Next, the slurry is filtered and washed with water to remove excess ionic components. Subsequently, the precursor separated by filtration is suspended in water, and an aqueous solution of a water-soluble salt of an antibacterial metal is added to the suspension under heating to a predetermined temperature, followed by aging for a predetermined time. Thereby, the desired metal-substituted cancrinite-like mineral is obtained.

  The deodorant antibacterial fiber product of the present invention can take various forms depending on the production method. For example, it may be in the form of a sheet, a fragment thereof, a particle, or a three-dimensional molded product. These forms can be obtained by producing the deodorant antibacterial fiber product of the present invention by a wet method. When the deodorant antibacterial fiber product of the present invention is in the form of a sheet, the sheet may be in the form of a single-layer sheet containing a metal-substituted cancrinite-like mineral, or may be in the form of a laminated sheet in which a plurality of sheets are laminated. It may be. When it is in the form of a single-layer sheet, the sheet is manufactured by a wet papermaking method using a slurry containing a fiber material and particles of a metal-substituted cancrinite-like mineral as a raw material. When in the form of a laminated sheet, an example of the sheet is a sheet having the form shown in FIG. The deodorant antibacterial sheet 1 shown in FIG. 1 has a width between two pulp sheets of the same rectangular shape, that is, a first pulp sheet 2 and a second pulp sheet 3, which are wider than these pulp sheets 2 and 3. This is a laminated sheet including a rectangular inner layer sheet 4 having a short length in the direction. That is, it is a laminated sheet in which pulp sheets are laminated on the upper and lower surfaces of a wet papermaking sheet containing a cancrinite-like mineral. The inner sheet 4 is a sheet of a fibrous material containing particles of the metal-substituted cancrinite-like mineral, and is similar to the single-layer sheet described above. The inner layer sheet 4 is a mixed paper made of a metal-substituted cancrinite-like mineral, and is sandwiched between two pulp sheets 2 and 3 at the center in the width direction. The inner layer sheet 4 and the pulp sheets 2 and 3 are laminated by lamination.

  The inner layer sheet 4 is not interposed in the side portions 1a and 1b of the deodorant antibacterial sheet 1 over the entire length direction, and the side portions are formed by laminating two pulp sheets 2 and 3. It has a layer structure. By joining the pulp sheets 2 and 3 at the side portions 1a and 1b, both end portions of the deodorant antibacterial sheet 1 are sealed, and the metal-substituted cancrinite-like mineral is prevented from falling off from the side end portions. Is done. The width of the side portions 1a and 1b is preferably 0.1 to 20 cm, more preferably 1 to 6 cm, so as to prevent the metal-substituted cancrinite-like mineral from falling off and sufficiently function as the metal-substituted cancrinite-like mineral. It is preferable from the viewpoint of expression.

  The sheet of the fiber material containing the metal-substituted cancrinite-like mineral (that is, the single-layer sheet and the inner layer sheet described above) is formed by a wet papermaking method using the slurry containing the fiber material and the particles of the metal-substituted cancrinite-like mineral as described above. Manufactured by A coagulant may be added to the slurry from the viewpoint of increasing the amount of the metal-substituted cancrinite-like mineral attached to the fiber material. As the flocculant, for example, polyacrylamide is suitably used. The amount of the metal-substituted cancrinite-like mineral in the slurry is preferably 0.01 to 50 parts by weight, particularly preferably 0.2 to 30 parts by weight based on 100 parts by weight of the fiber material. The amount of the coagulant is preferably 0.05 to 5.0 parts by weight, particularly preferably 0.2 to 1.0 part by weight, based on 100 parts by weight of the fiber material. The concentration of the fiber material in the slurry is preferably 0.5 to 5.0% by weight, particularly preferably 1.0 to 3.0% by weight.

  The fiber material is not particularly limited as long as it can be made by wet papermaking. For example, it is preferable to use cellulosic fibers such as pulp and rayon. In addition to these fibers, a small amount of heat-fusible fibers made of a thermoplastic resin can be used in combination.

The content of the metal-substituted cancrinite-like mineral in the sheet obtained by wet papermaking (that is, the single-layer sheet and the inner layer sheet described above) can be as high as 25% by weight or more, particularly 50 to 100% by weight. As described above, the reason for this is largely due to the shape of the metal-substituted cancrinite-like mineral. Depending on the specific application, the sheet preferably has a basis weight of 10 to 100 g / m ² , particularly preferably 13 to 70 g / m ² .

  When the deodorant antibacterial fiber product of the present invention is in the form of a sheet, it can be cut into small pieces and used. For example, a fragmented deodorant antibacterial fiber product can be used as a constituent material of an absorbent in an absorbent article described later.

  As described above, the deodorant antibacterial fiber product of the present invention may be in the form of a granule or a three-dimensional molded product in addition to a sheet. In the case of a granular form, it can be obtained by extruding a high-concentration slurry of a fiber material containing a metal-substituted cancrinite-like mineral from an extruder into a strand and cutting it into a predetermined size. When it is in the form of a three-dimensional molded product, it can be formed into various container shapes such as a bottle shape, a cup shape, and a tray shape. In order to produce such a three-dimensional molded product, it is preferable to use a pulp molding method. Details of the pulp molding method are described, for example, in WO 99/42661 of the applicant's earlier application.

  The deodorant antibacterial fiber product of the present invention is effective in deodorizing and antibacterial in various situations. For example, when the deodorant antibacterial fiber product of the present invention is in the form of a sheet or a fragment thereof, disposable diapers, sanitary napkins, constituent materials of absorbent articles such as absorbent pads, wallpaper, sheets, indentation sheets, It is useful as a wardrobe sheet, a shoe box sheet, a mat, a shoe insole, a mask, a filter, a wrapping food insole sheet, and the like. When the deodorant antibacterial fiber product of the present invention is in the form of beads or pellets, it is useful as a deodorant for pets such as cat sand. When the deodorant antibacterial fiber product of the present invention is in the form of a three-dimensional molded product, it is useful as, for example, a dust box, a storage case, a food tray and the like.

  When the deodorant antibacterial fiber product of the present invention is in the form of a sheet, when the sheet is used as a constituent material of an absorbent article, the sheet may be, for example, a liquid-permeable topsheet and a liquid-retentive absorber. Between the absorber, or between the absorber and the liquid-impermeable back sheet. FIG. 2 shows a state in which the absorbent of the absorbent article is covered with the deodorant antibacterial sheet of the present invention as an example in which the deodorant antibacterial sheet of the present invention is applied to an absorbent article. The absorber 10 is composed of superabsorbent polymer particles and pulp fibers. The absorber 10 is covered with the deodorant antibacterial sheet 1 such that one side 1a and the other side 1b of the deodorant antibacterial sheet 1 overlap each other. In this state, the absorber 10 is sandwiched between a top sheet and a back sheet (not shown) to form an absorbent article. Therefore, in this embodiment, the deodorant antibacterial sheet 1 is disposed between the top sheet and the absorber and between the back sheet and the absorber in the absorbent article. In this case, if any part of the absorbent article contains an adsorbing substance of sulfur compounds such as hydrogen sulfide and mercaptans, which are typical substances of foul odor, the metal in the metal-substituted cancrinite-like minerals Since the reduction of the antibacterial property of the metal due to the bonding with the sulfur compound is effectively prevented, it is preferable in terms of the persistence of the antibacterial property. The deodorizing power of the metal-substituted cancrinite-like mineral is also improved. A typical example of the sulfur compound adsorbing material is zinc oxide. The adsorbed substance of the sulfur compound can be attached to, for example, the deodorant antibacterial sheet of the present invention, or can be contained in the absorber.

  Hereinafter, the present invention will be described in more detail with reference to examples. However, the scope of the present invention is not limited to such an embodiment. In the following examples, “%” means “% by weight” unless otherwise specified.

[Example 1]
103 g of sodium hydroxide is dissolved in 1000 ml of ion-exchanged water, and 157 g of a sodium aluminate solution (Na ₂ O = 19.8%, Al ₂ O ₃ = 25.9%, H ₂ O = 54.3%) is mixed. 259 g of water glass (Na ₂ O = 9.8%, SiO ₂ = 29.6%, H ₂ O = 60.6%) was added to the solution over 1 minute, and reacted at 100 ° C. for 2 hours. . Thereafter, a solution in which 32 g of sodium hydroxide was dissolved in 110 ml of ion-exchanged water and 124 g of nitric acid (61%) was additionally added over 1 minute, and further reacted at 100 ° C. for 10 hours to obtain aluminosilicate particles. . After the reaction, the generated aluminosilicate particles were filtered and washed, and dried at 105 ° C. for 12 hours to obtain powder of raw material aluminosilicate particles. The obtained raw material aluminosilicate particles had a form in which columnar and needle-like crystals were aggregated and developed into a tetrapod shape. The composition of the obtained raw material aluminosilicate particles was Na ₂ O · Al ₂ O ₃ · 2.3SiO ₂ · 0.7NaNO ₃ · 1.3H ₂ O.

100 g of the obtained raw material aluminosilicate particles were suspended in 900 ml of ion-exchanged water and kept at 100 ° C. Under stirring, 120 ml of 61% nitric acid was added dropwise at a rate of 1 ml / min, and acid treatment was performed for 120 minutes. After dropping, the mixture was aged at 100 ° C. for 1 hour. Next, the slurry was filtered, washed with water, and dried at 105 ° C. for 12 hours to obtain a white precursor. The composition of the precursor was 0.07Na ₂ O · 0.93H ₂ O · Al ₂ O ₃ · 5.3SiO ₂ · 0.11NaNO ₃ · 4.10H ₂ O.

100 g of the obtained precursor was suspended in 900 ml of ion-exchanged water and kept at 100 ° C. Under stirring, an aqueous silver nitrate solution in which 1.55 g of silver nitrate was dissolved in 30 ml of ion-exchanged water was charged, and the mixture was annealed for 1 hour. Thereafter, the resultant was filtered, washed with water, and dried at 105 ° C. for 12 hours to partially replace Na in the precursor with Ag, thereby obtaining an amorphous Ag-substituted cancrinite-like mineral. The average particle diameter is 7 μm, the specific surface area is 230 m ² / g, the acid amount is 140 meq / 100 g, and the composition is 0.02 Ag ₂ O.0.02 Na ₂ O.Al ₂ O ₃ .5.30 SiO ₂ .0.11 NaNO _3. 5.03H was ₂ O.

The obtained Ag-substituted cancrinite-like mineral was suspended in ion-exchanged water, and pulp and polyacrylamide were added and mixed to obtain a papermaking slurry. The concentration of the Ag-substituted cancrinite-like mineral in the slurry was 0.01%, the concentration of the pulp was 2.0%, and the concentration of the polyacrylamide was 0.006%. Using this slurry as a raw material, wet papermaking was performed using a round mesh paper machine to obtain a paper containing an Ag-substituted cancrinite-like mineral having a basis weight of 20 g / m ² . The amount of the Ag-substituted cancrinite-like mineral in the paper containing the Ag-substituted cancrinite-like mineral was 0.2%. While the paper was in a wet state, a pulp sheet having a basis weight of 16 g / m ² was laminated on each side to obtain a laminated sheet shown in FIG.

  As shown in FIG. 2, the obtained laminated sheet was coated with an absorbent comprising particles of superabsorbent polymer and fluff pulp. A liquid-permeable top sheet made of an air-through nonwoven fabric and a liquid-impermeable back sheet made of a polyethylene film were overlapped on the upper and lower surfaces of the coated absorber, respectively, to obtain an absorbent pad according to a conventional method.

[Example 2]
Dissolve 94 g of sodium hydroxide in 1000 ml of ion-exchanged water, and further add 130 g of nitric acid (61%) and a sodium aluminate solution (Na ₂ O = 19.8%, Al ₂ O ₃ = 25.9%, H ₂ O = 54). 127 g of water glass (Na ₂ O = 9.8%, SiO ₂ = 29.6%, H ₂ O = 60.6%) was added to the mixed solution of 124 g over 1 minute. The reaction was carried out at 8 ° C. for 8 hours to obtain aluminosilicate particles. After the reaction, the generated aluminosilicate particles were filtered and washed, and dried at 105 ° C. for 12 hours to obtain powder of raw material aluminosilicate particles. The obtained raw material aluminosilicate particles had a porous cone-shaped spherical shape with needle-like crystals aggregated. The composition of the obtained raw material aluminosilicate particles was Na ₂ O · Al ₂ O ₃ · 2.3SiO ₂ · 0.7NaNO ₃ · 1.3H ₂ O.

100 g of the obtained raw material aluminosilicate particles were suspended in 900 ml of ion-exchanged water and kept at 100 ° C. Under stirring, 61 ml of 61% nitric acid was dropped at a rate of 1 ml / min, and an acid treatment was performed for 20 minutes. After dropping, the mixture was aged at 100 ° C. for 1 hour. Next, the slurry was filtered, washed with water, and dried at 105 ° C. for 12 hours to obtain a white precursor. The composition of the precursor was _{0.70Na 2 O · Al 2 O 3} · 2.05SiO 2 · 0.36NaNO 3 · 1.98H 2 O. After that, a part of Na in the precursor was replaced with Ag in the same manner as in Example 1 to obtain an amorphous Ag-substituted cancrinite-like mineral. The average particle diameter is 15 μm, the specific surface area is 110 m ² / g, the acid amount is 51 meq / 100 g, and the composition is 0.01 Ag ₂ O · 0.69 Na ₂ O · Al ₂ O ₃ · 2.05 SiO ₂ · 0.36 NaNO _3. 2.25H was ₂ O. Thereafter, an absorbent pad was obtained in the same manner as in Example 1.

[Comparative Example 1]
Wet papermaking was performed under the same conditions as in Example 1 except that zeolite was used instead of the Ag-substituted cancrinite-like mineral, to obtain a zeolite-containing paper having a basis weight of 20 g / m ² . The amount of zeolite in the zeolite-containing paper was 0.03%. While the paper was in a wet state, a pulp sheet having a basis weight of 16 g / m ² was laminated on each side to obtain a laminated sheet shown in FIG. Thereafter, an absorbent pad was obtained in the same manner as in Example 1.

(Performance evaluation)
With respect to the absorbent pads obtained in Examples and Comparative Examples, the antibacterial ability and the deodorizing ability of bad smell were evaluated by the following methods. The results are shown in Tables 1 and 2.

(Antibacterial activity)
Artificial urine mixed with Escherichia coli was injected into the absorbent pad and stored at 30 ° C. for 24 hours. This absorbent pad was immersed in a physiological saline solution in excess of the saturated absorption amount and stirred. The physiological saline was filtered, and the number of bacteria in the filtrate was measured. The antibacterial effect of the measured number of bacteria was evaluated based on Comparative Example 1 according to the following criteria.
-: Bacterial growth is suppressed more than in the base.
+: Number of bacteria growing or equal to that of base.

(Deodorizing ability of odor)
An absorbent pad was placed in a 1-liter Tedlar bag (manufactured by Sanshoki) and sealed, and 1 liter of methyl mercaptan whose concentration was adjusted at room temperature (25 ° C.) was filled therein. After a predetermined time, the methyl mercaptan concentration in the bag was measured with a gas detection tube (70 L for mercaptan, manufactured by Gastech Co., Ltd.). In Table 2, 0 minutes indicates the initial concentration.

  As is clear from the results shown in Tables 1 and 2, the antibacterial ability and the deodorant ability of the absorbent pad of each example (the product of the present invention) are superior to those of the comparative example. I understand. Further, the Ag-substituted cancrinite-like mineral of each example had a larger amount of adhering to pulp than the zeolite of Comparative Example 1 which was made under the same conditions.

It is a perspective view showing one embodiment of a deodorant antibacterial sheet of the present invention. It is a perspective view which shows the state which covered the ball body with the deodorant antibacterial sheet shown in FIG.

Explanation of reference numerals

1 deodorant antibacterial sheet 2, 3 pulp sheet 4 inner layer sheet

Claims (6)

  A deodorant antibacterial fiber product obtained by attaching particles of a cancrinite-like mineral containing an antibacterial metal to a fiber material.   The deodorant antibacterial fiber product according to claim 1, wherein a part of the cancrinite-like mineral is in an amorphous state.   The deodorant antibacterial antibacterial according to claim 1 or 2, wherein the fibrous material is a cellulosic fiber, which is in the form of a sheet, a fragment thereof, a granule, or a three-dimensional molded product, and which is produced by a wet method. Fiber products.   A pulp sheet is laminated on each surface of the wet-laid sheet containing the cancrinite-like mineral, and the laminated sheet is a laminated sheet, and the laminated sheet does not have the wet-laid sheet interposed at least over one entire side thereof. The deodorant antibacterial fiber product according to any one of claims 1 to 3.   2. The erasing device according to claim 1, wherein the sheet-like form is formed between the liquid-permeable top sheet and the liquid-retentive absorber, the absorber, or between the absorber and the liquid-impermeable backsheet. Absorbent articles with odor and antibacterial fiber products. The absorbent article according to claim 5, further comprising a sulfur compound adsorbent.

Images