JP2020151340A - Absorbent article - Google Patents

Abstract

To fully exhibit an antibacterial effect by an antibacterial agent, and prevent absorption performance from lowering.SOLUTION: An antibacterial nonwoven fabric comprising a fiber 10 having a surface to which a fiber treatment agent 11 adheres, and an antibacterial agent is arranged at a skin side of an absorber 4. The antibacterial agent is composed of an antibacterial agent 12 in the fiber, kneaded into the fiber 10, and an antibacterial agent 13 in the fiber treatment agent, mixed with the fiber treatment agent 11. As the fiber treatment agent, a hydrophilic agent is preferably used. An amount of the antibacterial agent remaining in the antibacterial nonwoven fabric after body fluid discharge is larger than an amount of the antibacterial agent eluted from the antibacterial nonwoven fabric with body fluid discharge. The antibacterial nonwoven fabric constitutes at least a part of a surface sheet 3, a second sheet 8 or a covering sheet 9. The antibacterial agent 12 in the fiber comprises a water-insoluble inorganic antibacterial agent, and the antibacterial agent 13 in the fiber treatment agent comprises a water-soluble organic antibacterial agent.SELECTED DRAWING: Figure 6

Description

The present invention mainly relates to absorbent articles such as urine absorbing pads, incontinence pads, disposable diapers, sanitary napkins, and vaginal discharge sheets, and particularly to absorbent articles provided with antibacterial agents.

Conventionally, there has been known a technique of suppressing the growth of bacteria contained in body fluids such as urine and menstrual blood by providing the absorbent article with an antibacterial agent to reduce skin troubles and suppress the generation of foul odors. .. Since the antibacterial agent exerts an antibacterial effect against bacteria and the like contained in the body fluid for the first time upon contact with the body fluid, it is desirable that the antibacterial agent be evenly distributed over the entire portion where the body fluid is absorbed.

As a means for arranging the antibacterial agent on the absorbent article, there is a technique of mixing a powdery antibacterial agent together with the pulp fibers when stacking the absorbent body to disperse and mix the antibacterial agent in the absorbent body. Since the antibacterial effect is not exhibited against the body fluid that does not come into contact with the antibacterial agent, this method has insufficient antibacterial effect. Further, as another means, there is a technique of spraying or applying an antibacterial agent dissolved in a liquid on the surface of the absorber, but there is a possibility that the absorption performance of the body fluid may be deteriorated by applying the liquid to the absorber. It was.

On the other hand, in Patent Document 1 below, the absorber has a first absorbing layer and a first sheet located on the non-skin facing surface side of the first absorbing layer, and the first sheet is the skin. An absorbent article is disclosed which has a plurality of recesses recessed from the facing surface side toward the non-skin facing surface side, and an antibacterial agent is arranged in each of the plurality of recesses.

Further, in Patent Document 2 below, an antibacterial sheet is arranged on the outermost surface of the surface sheet on the skin side or the surface of the surface sheet on the absorber side, and the antibacterial sheet is hydrophobic with a hydrophilic fiber layer. The antibacterial sheet comprises a sheet-like base material containing a sex fiber layer and an antibacterial composition layer formed on the hydrophilic fiber layer of the sheet-like base material and composed of an antibacterial composition. The antibacterial composition layer side is attached to the surface sheet via an adhesive, and the antibacterial composition is a thermoplastic water-soluble polymer that is solid at room temperature and dissolves in a body fluid, and an antibacterial agent. Absorbent articles are disclosed that include.

JP-A-2018-990203 Japanese Patent No. 5096736

In Patent Document 1, when the first sheet having a recess is provided in the absorber, the body fluid absorbed by the absorber is rapidly diffused in the absorber along the recess of the first sheet. Although the action and effect of exerting an antibacterial effect by contacting with the antibacterial agent arranged in the concave portion of the first sheet is described, it does not reach the concave portion of the first sheet and is arranged on the skin side of the first sheet. Since the body fluid absorbed by the first absorbing layer, the surface sheet, the encapsulating sheet covering the absorber, etc. does not come into contact with the antibacterial agent and the antibacterial effect of the antibacterial agent is not exhibited, such a first absorbing layer , There was a risk of offensive odors being generated from body fluids absorbed by the surface sheet, encapsulating sheet, and the like.

On the other hand, in Patent Document 2, the antibacterial sheet uses a thermoplastic water-soluble polymer that dissolves in the body fluid as a carrier of the antibacterial agent in the antibacterial composition adhered to the sheet-like substrate. The action and effect that the thermoplastic water-soluble polymer is dissolved by contact with the polymer, and as a result, the antibacterial agent in the thermoplastic water-soluble polymer is released to exert an antibacterial effect is described. Is released and flows out together with the body fluid, so that almost no antibacterial agent remains on the antibacterial sheet after the body fluid is discharged. For this reason, there is a risk that a foul odor may be generated from the body fluid adhering to the skin surface or the body fluid absorbed by the surface sheet. Further, since the antibacterial composition layer composed of the thermoplastic water-soluble polymer and the antibacterial agent is coated on the hydrophilic fiber layer of the antibacterial sheet by spray coating or the like, the hydrophilic agent is previously applied to the surface of the fibers. However, since the antibacterial composition layer is further overcoated on this hydrophilic agent, the hydrophilic effect of the hydrophilic agent cannot be sufficiently exerted and absorbed. There was a risk of performance degradation.

Therefore, a main object of the present invention is to provide an absorbable article in which the antibacterial effect of the antibacterial agent can be sufficiently exhibited and the absorption performance is not deteriorated.

In order to solve the above-mentioned problems, as the present invention according to claim 1, in an absorbent article containing an absorber,
An antibacterial non-woven fabric composed of fibers having a fiber treatment agent attached to the surface and an antibacterial agent is arranged on the skin side of the absorber.
Provided is an absorbable article, wherein the antibacterial agent comprises an antibacterial agent in a fiber kneaded into the fiber and an antibacterial agent in the fiber treatment agent mixed with the fiber treatment agent.

In the invention according to claim 1, the antibacterial non-woven fabric is disposed on the skin side of the absorber, and the antibacterial agent contained in the antibacterial non-woven fabric is the antibacterial agent in the fiber kneaded into the fiber and the fiber. It is composed of an antibacterial agent in a fiber treatment agent mixed with the treatment agent. Therefore, when the body fluid passes through the antibacterial nonwoven fabric due to the discharge of the body fluid, the fiber treatment agent adhering to the surface of the fibers constituting the antibacterial nonwoven fabric and the antibacterial in the fiber treatment agent contained therein The agent separates from the fiber and dissolves in the body fluid. The body fluid in which the antibacterial agent is dissolved in the fiber treatment agent is absorbed and retained by the absorber. Since the antibacterial agent in the fiber treatment agent is dissolved in the body fluid absorbed by this absorber, the antibacterial effect of this antibacterial agent is exerted and no foul odor is generated. On the other hand, since the antibacterial agent in the fiber is supported by being kneaded into the fiber, the antibacterial agent remains supported in the fiber and exerts an antibacterial effect at a position close to the wearer's skin surface. .. In addition, since the antibacterial agent in the fiber treatment agent is mixed with the fiber treatment agent attached to the surface of the fiber, the absorption performance is not impaired, such as hydrophilicity and flexibility, as the fiber treatment agent. Does not get worse.

As the present invention according to claim 2, the absorbable article according to claim 1, wherein the fiber treatment agent is a hydrophilic agent is provided.

In the invention according to claim 2, since the hydrophilic agent is used as the fiber treatment agent, the hydrophilicity of the fiber can be increased and the antibacterial agent can be quickly dissolved in the body fluid.

According to the third aspect of the present invention, a surface sheet in contact with the skin surface of the wearer is disposed on the skin side of the absorber.
The absorbent article according to any one of claims 1 and 2, wherein at least a part of the surface sheet is made of the antibacterial non-woven fabric.

In the invention according to claim 3, since the surface sheet disposed closest to the skin is made of an antibacterial non-woven fabric, the antibacterial effect of the antibacterial agent in the fiber treatment agent that flows out together with the body fluid when the body fluid is discharged is absorbed from the surface sheet. It spreads to the sheet material placed on the body side, making it easier to exert the antibacterial effect, and since the skin side of the surface sheet is always in contact with the skin surface, after the body fluid is discharged, the bad odor due to the body fluid adhering to the skin surface The occurrence will be surely suppressed.

According to the fourth aspect of the present invention, a surface sheet in contact with the skin surface of the wearer is disposed on the skin side of the absorber, and a second sheet is disposed between the surface sheet and the absorber.
The absorbent article according to any one of claims 1 to 3, wherein at least a part of the second sheet is made of the antibacterial non-woven fabric.

In the invention according to claim 4, the second sheet disposed between the surface sheet and the absorber is made of an antibacterial non-woven fabric.

According to the fifth aspect of the present invention, the absorber is surrounded by an encapsulating sheet.
The absorbent article according to any one of claims 1 to 4, wherein at least a part of the encapsulating sheet arranged on the skin side of the absorbent body is made of the antibacterial non-woven fabric.

In the invention according to claim 5, the encapsulating sheet surrounding the absorber is made of an antibacterial non-woven fabric.

According to the sixth aspect of the present invention, the amount of the antibacterial agent remaining on the antibacterial nonwoven fabric after the discharge of the body fluid is larger than the amount of the antibacterial agent eluted from the antibacterial nonwoven fabric with the discharge of the body fluid. The absorbent article according to any one of 1 to 5 is provided.

In the invention according to claim 6, the amount of the antibacterial agent remaining on the antibacterial non-woven fabric after the discharge of the body fluid is larger than the amount of the antibacterial agent eluted from the antibacterial non-woven fabric with the discharge of the body fluid. In each state before and after urination, many antibacterial agents are placed near the wearer's skin surface, and the antibacterial effect near the skin surface can be maintained.

According to the present invention according to claim 7, the antibacterial agent in the fiber is made of an antibacterial agent which is poorly soluble in water, and the antibacterial agent in the fiber treatment agent is made of an antibacterial agent which is soluble in water. The absorbent article according to any one is provided.

In the invention according to claim 7, since the antibacterial agent in the fiber needs to remain in the fiber without being eluted in the body fluid, it is preferable to use the antibacterial agent which is poorly soluble in water, and the fiber. Since the antibacterial agent in the treatment agent needs to be dissolved in the body fluid and mixed / diffused in the body fluid, it is preferable to use an antibacterial agent soluble in water.

The absorbability according to claim 7, wherein the antibacterial agent sparingly soluble in water is composed of an inorganic antibacterial agent, and the antibacterial agent soluble in water is composed of an organic antibacterial agent. Goods are provided.

In the invention according to claim 8, a specific example is given as an antibacterial agent that is sparingly soluble and soluble in water.

The present invention according to claim 9, wherein the antibacterial non-woven fabric is provided in a portion corresponding to the body fluid draining portion of the wearer, and the antibacterial non-woven fabric is not provided in other portions. The absorbent article described in 1 is provided.

In the invention according to claim 9, the antibacterial non-woven fabric is provided only in the portion corresponding to the body fluid draining portion of the wearer, and is not provided in other portions. By providing the antibacterial non-woven fabric only in the necessary part, the antibacterial effect can be sufficiently exhibited and the cost can be suppressed.

As described in detail above, according to the present invention, it is possible to provide an absorbent article in which the antibacterial effect of the antibacterial agent can be sufficiently exhibited and the absorption performance is not deteriorated.

It is a partially broken development view of the urine collecting pad 1 which concerns on this invention. FIG. 2 is a view taken along the line II-II of FIG. FIG. 3 is a view taken along the line III-III of FIG. It is sectional drawing of fiber 10. (A) is a cross-sectional view of a urine collecting pad 1 showing a state before urination and (B) showing a state after urination. (A) is a cross-sectional view of a fiber showing a state before urination and (B) a state after urination. It is sectional drawing of the fiber with an antibacterial agent which shows the conventional form.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[Example of basic structure of urine collecting pad]
As shown in FIGS. 1 to 3, the urine absorbing pad 1 according to the present invention forms a contact surface between the leak-proof sheet 2 made of a polyethylene sheet or the like and the wearer's skin, and quickly permeates urine or the like. Abbreviation of the above-mentioned absorber 4, the surface sheet 3 to be used, the absorber 4 interposed between the two sheets 2 and 3, the exterior sheet 5 covering the outermost surface (non-woven fabric contact surface) of the urine absorbing pad 1. A pair of left and right three-dimensional gather BSs protruding toward the skin side in a predetermined section in the front-rear direction including at least the urine opening portion of the wearer with the side edge portion as the standing base end, and side non-woven fabrics 6 and 6 forming the BS. It is mainly composed of a second sheet 8 disposed between the surface sheet 3 and the absorber 4 as needed, and around the absorber 4, the leak-proof sheet 2 at the upper and lower end edges thereof, The outer edges of the surface sheet 3 and the exterior sheet 5 are joined by an adhesive such as hot melt or a joining means such as a heat seal or an ultrasonic seal, and both side edges thereof extend laterally from the absorber 4. The leak-proof sheet 2, the surface sheet 3, the exterior sheet 5, and the side non-woven fabric 6 are joined by an adhesive such as hot melt, heat seal, ultrasonic seal, or other joining means.

Hereinafter, the structure of the urine collecting pad 1 will be described in more detail.
As the leak-proof sheet 2, a sheet material having at least water-shielding property such as polyethylene is used, but in recent years, a sheet material having moisture permeability has tended to be used from the viewpoint of preventing stuffiness. The water-impervious / moisture-permeable sheet material has microporous properties obtained by melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet in the uniaxial or biaxial direction. Sheets are preferably used. As the leak-proof sheet 2, a polylami non-woven fabric in which a plastic film and a non-woven fabric are laminated may be used.

Next, as the surface sheet 3, a perforated or non-perforated non-woven fabric, a porous plastic sheet, or the like is preferably used. The material fibers constituting the non-woven fabric can be olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, and natural fibers such as cotton. A non-woven fabric obtained by an appropriate processing method such as a method, a spunbond method, a thermal bond method, a melt blown method, or a needle punch method can be used. Among these processing methods, the spunlace method is excellent in that it is rich in flexibility and drapeability, and the thermal bond method is excellent in that it is bulky and has high compression stability. When a large number of through holes are formed in the surface sheet 3, the body fluid is rapidly absorbed, and the dry touch property is excellent. The fibers of the non-woven fabric may be either long fibers or short fibers, but it is preferable to use short fibers in order to give the texture of the towel cloth. Further, in order to facilitate the embossing treatment, it is preferable to use an olefin fiber such as polyethylene or polypropylene having a relatively low melting point. Further, a core-sheath type fiber having a fiber having a high melting point as a core and a fiber having a low melting point as a sheath, a side-by-side type fiber, and a composite fiber of a split type fiber can also be preferably used.

The absorber 4 interposed between the leak-proof sheet 2 and the surface sheet 3 is composed of, for example, cotton-like pulp and a super absorbent polymer. The super absorbent polymer is mixed in the pulp constituting the absorber 4 as, for example, granular powder. Examples of the pulp include cellulose fibers such as chemical pulp and dissolved pulp obtained from wood, and artificial cellulose fibers such as rayon and acetate, and coniferous pulp having a longer fiber length has more functions than broadleaf pulp. It is preferably used in terms of price.

In addition, synthetic fibers may be mixed with the absorber 4. As the synthetic fiber, for example, polyolefin-based synthetic fibers such as polyethylene or polypropylene, polyester-based materials such as polyethylene terephthalate and polybutylene terephthalate, polyamide-based materials such as nylon, and copolymers thereof can be used, and these two types can be used. It may be a mixture. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can also be used. In the case of hydrophobic fibers, it is desirable to use the synthetic fibers surface-treated with a hydrophilizing agent so as to have an affinity for body fluids.

The super absorbent polymer also contains "powder" in addition to "particles". As the super absorbent polymer, those having a particle size used for this kind of absorbent article can be used as it is, and a polymer having an average particle size of 1000 μm or less, preferably a particle size of 106 μm or more when not absorbed is 99 weight in total. % Or more, particularly those having a diameter of 150 to 850 μm are preferably 99% by weight or more of the whole. The average particle size when not absorbed is preferably about 250 to 500 μm. Further, it is desirable that the average particle size after absorption of the superabsorbent polymer is 3 times or more, specifically 500 μm or more, the average particle size at the time of non-absorption. The average particle size of the superabsorbent polymer when not absorbed means the particle size at an integrated value of 50% in the weight-based particle size distribution. The weight-based particle size distribution in this case is measured according to JISZ8815-1994. That is, 710 μm, 500 μm, 300 μm, 150 μm, and 106 μm open-opening sieves having an inner diameter of 150 mm and a depth of 45 mm are stacked with the narrow-opening sieve facing down, and above the topmost wide-opening 710 μm sieve. 50 g of the measurement sample is placed in the mixture, sieved for 10 minutes with a sieve vibrator, the weight of the measurement sample remaining on each sieve is measured, and the measurement sample remaining on each sieve based on the weight of the first measurement sample is measured. Measured by determining% by weight.
The amount of the superabsorbent polymer to be coated can be appropriately determined according to the amount of absorption required for the application of the absorber 4. Therefore, although it cannot be said unconditionally, it can be set to 50 to 350 g / m ² . If the polymer coating amount is less than 50 g / m ² , it becomes difficult to secure the absorption amount. If it exceeds 350 g / m ² , not only the effect is saturated, but also the excess of the super absorbent polymer gives a jerky discomfort.

In the absorber 4, the ratio of the superabsorbent polymer to the total weight of the pulp and the superabsorbent polymer is preferably 5 to 90% by weight, particularly preferably 30 to 70% by weight. If the ratio of the super absorbent polymer is less than 5% by weight, the water absorption capacity may be insufficient. On the other hand, if it is larger than 90% by weight, the superabsorbent polymer has a strong jerky feeling (particle feeling), and the usability is lowered.

In order to maintain the shape and improve the diffusivity of the absorber 4, it is preferable to cover at least the skin side surface and the non-skin side surface of the absorber 4 with an encapsulating sheet 9 made of crepe paper, non-woven fabric or the like. When the encapsulating sheet 9 covering the absorber 4 is provided, as a result, the encapsulating sheet 9 is interposed between the surface sheet 3 and the absorber 4, and the encapsulating sheet 9 is made of crepe paper. In this case, the encapsulating sheet 9 having excellent absorbability rapidly diffuses the body fluid and prevents the body fluid absorbed by the absorber 4 from returning. In order to enclose the absorber 4 with the encapsulating sheet 9, as shown in FIGS. 2 and 3, one encapsulating sheet 9 wraps both side edges of the absorber 4 and folds back. Alternatively, the skin side surface and the non-skin side surface of the absorber 4 may be covered with separate sheets.

It is preferable to form leg circumference cut lines 4a and 4a having a curved shape that bulges inward in the width direction on both side portions of the absorber 4. By providing the leg circumference cut lines 4a and 4a, the fit to the leg circumference at the time of wearing is improved, leakage of body fluid can be prevented, and the feeling of stiffness is reduced and the wearing feeling is improved. The positions of the cut lines 4a and 4a around the legs in the longitudinal direction are arbitrary, but as shown in FIG. 1, it is preferably provided in the central portion in the longitudinal direction. Further, the shape of the curve is also arbitrary, and in the illustrated example, it is formed in an arc shape.

The exterior sheet 5 covers the outer surface (non-skin contact surface) of the leak-proof sheet 2 to give the outer surface of the urine absorbing pad 1 a cloth-like appearance and feel. The exterior sheet 5 is preferably formed of a non-woven fabric. As the material fiber, olefin-based fibers such as polyethylene or polypropylene, synthetic fibers such as polyester-based and polyamide-based, recycled fibers such as rayon and cupra, and natural fibers such as cotton can be used, and the processing method is the spunlace method. , Span bond method, thermal bond method, air through method, needle punch method, etc. can be used for production. However, long-fiber non-woven fabrics such as spunbonded non-woven fabrics, SMS non-woven fabrics, and SMMS non-woven fabrics are preferable from the viewpoint of achieving both touch and strength.

The non-woven fabric forming the exterior sheet 5 can be used alone or in layers. When a plurality of non-woven fabrics are used in layers, the non-woven fabrics are fixed to each other via an adhesive such as hot melt. It is preferable to do so. When a non-woven fabric is used, the fiber texture is preferably 10 to 50 g / m ² , particularly preferably 15 to 30 g / m ² .

By forming one or more temporary fixing layers (not shown) on the unused surface side (outer surface) of the exterior sheet 5, the urine absorbing pad 1 is fixed to underwear, a disposable diaper, or the like when attached to the body. You may do so. As the temporary fixing layer, a mechanically bonded hook material may be used, or an adhesive may be used. The temporary fixing layer is provided as needed and does not have to be provided in particular.

In the illustrated example, the exterior sheet 5 is slightly wider than the width of the absorber 4, and the side edges of the leak-proof sheet 2 and the surface sheet 3 are involved in both sides to reach the skin side of the surface sheet 3. The outer side of the surface sheet 3 in the width direction is infiltrated with the side non-woven fabric 6 extending from both side surfaces of the surface sheet 3, specifically, urine or the like, to the outer surface side of the exterior sheet 5 extending to the skin side. The side non-woven fabric 6 is arranged by using a non-woven fabric material which has been appropriately treated with water-repellent treatment or hydrophilic treatment, depending on the purpose of preventing urination or enhancing the feeling of touch. As the side non-woven fabric 6, one made of natural fiber, synthetic fiber, recycled fiber or the like and formed by an appropriate processing method can be used, but preferably, the feeling of stiffness is eliminated and stuffiness is prevented. Therefore, it is preferable to use a non-woven fabric having a low basis weight and having air permeability. Specifically, it is desirable to use a non-woven fabric produced with a basis weight of 8 to 23 g / m ² , and in order to reliably prevent the permeation of body fluids, a silicon-based, paraffin-based, alkylchromic chloride-based water repellent, etc. A water-repellent treated non-woven fabric coated with is preferably used.

The inner side portion of the side nonwoven fabric 6 is substantially double-folded, and one or a plurality of filamentous elastic elastic members 7 in the middle portion in the height direction of the double sheet, in the illustrated example, three filamentous elastic elastic members 7. 7 ... Are arranged in a state where both ends or appropriate positions in the longitudinal direction are fixed. As shown in FIG. 3, this double sheet portion is adhered to the absorber 4 side in a state of being laminated once by being folded back once at the front and rear ends, so that at least the front and rear including the urination port of the wearer are included. As shown in FIG. 2 within a predetermined section of the direction, three-dimensional gather BSs and BSs standing on the skin side are formed in pairs on the left and right.

The second sheet 8 may be any as long as it has hydrophilicity with respect to body fluids. Specifically, regenerated fibers such as rayon and cupra, and natural fibers such as cotton are used to make the material itself hydrophilic, or olefins such as polyethylene or polypropylene, polyesters, and polyamides are synthesized. Fibers obtained by surface-treating the fibers with a hydrophilic agent to impart hydrophilicity can be used. Further, composite fibers such as core-sheath type fibers having a high melting point fiber as a core and a low melting point fiber as a sheath, side-by-side type fibers, and split type fibers can be used. As the fibers constituting the non-woven fabric, long fibers, short fibers, or a mixture thereof can be used. As the second sheet 8, any of known forms of non-woven fabric such as air through, air raid, and spunbond can be used, but it is preferable to use an air through that does not reduce the air permeability and gives the surface sheet 3 a fluffy feeling and a cushioning feeling.

[Antibacterial non-woven fabric]
In the urine absorbing pad 1 according to the present invention, as shown in FIG. 4, an antibacterial non-woven fabric composed of a fiber 10 having a fiber treatment agent 11 adhered to the surface and an antibacterial agent is arranged on the skin side of the absorber 4. It is characteristic that it is installed. The antibacterial non-woven fabric constitutes at least a part of a member arranged on the skin side of the absorber 4, specifically, one or more members selected from the group of the surface sheet 3, the second sheet 8, and the encapsulating sheet 9. are doing. That is, at least a part of any one of the surface sheet 3, the second sheet 8 and the encapsulated sheet 9, or two or more members selected from these is made of the antibacterial non-woven fabric. When the encapsulated sheet 9 is composed of the antibacterial non-woven fabric, if at least a part of the encapsulated sheet 9 covering the skin side of the absorber 4 is the antibacterial non-woven fabric, it covers the non-skin side of the absorber 4. The encapsulating sheet 9 does not have to be the antibacterial non-woven fabric, and crepe paper or a non-woven fabric having no antibacterial property may be used.

The antibacterial non-woven fabric may form the entire surface of the surface sheet 3, the second sheet 8 or the encapsulating sheet 9, or may form only a part corresponding to the body fluid discharge part of the wearer, and other parts. May not be provided with the antibacterial non-woven fabric. In the latter case, the portion other than the antibacterial non-woven fabric is preferably formed of a non-woven fabric having no antibacterial property in the form in which the antibacterial non-woven fabric constitutes the surface sheet 3 or the encapsulated sheet 9. In the form in which the non-woven fabric constitutes the second sheet 8, it may be formed of a non-woven fabric having no antibacterial property, or nothing in particular may be arranged.

As shown in FIG. 4, the antibacterial agent contained in the antibacterial non-woven fabric is the antibacterial agent 12 in the fiber kneaded into the fiber 10 and the antibacterial agent 13 in the fiber treatment agent mixed with the fiber treatment agent 11. It is composed of and.

The antibacterial agent 12 in the fiber is contained in the fiber 10 by kneading the fiber 10 at the time of spinning according to a known production method. Specifically, the antibacterial agent 12 in the fiber is kneaded in advance with the raw material resin for producing the non-woven fabric, and the non-woven fabric is produced after spinning using the raw material resin. The material of the fiber 10 may be any of synthetic fiber, semi-synthetic fiber, and natural fiber, but acetate fiber and rayon fiber, which can be kneaded at the time of spinning and are rich in hydrophilicity, are preferable. The amount of the antibacterial agent 12 in the fiber kneaded into the fiber 10 is preferably 0.1 to 20% by weight based on the weight of the fiber 10 from the viewpoint of antibacterial durability and cost.

The fiber treatment agent 11 is adhered to the surface of the fiber 10 by coating the surface of the constituent fibers of the non-woven fabric produced by various methods according to a conventional method. As the coating method, known methods can be adopted without limitation, and examples thereof include a curtain spray method, a slot coat method, a spiral spray method, a beat method, a gravure coat method, and a die coater method.

As the fiber treatment agent 11, known treatment agents used for the purpose of improving the properties of fibers, such as a hydrophilic agent that enhances hydrophilicity to body fluids and a softener that improves the feel with the skin, are used without limitation. However, in the urine absorbing pad 1 according to the present invention, it is preferable to use a hydrophilic agent in order to facilitate the dissolution of the fiber treatment agent 11 in the body fluid.

As the hydrophilic agent, a nonionic surfactant and an alkyl phosphate ester salt to which ethylene oxide such as a higher alcohol, a higher fatty acid, and an alkylphenol is added, in consideration of safety to the human body, safety in the manufacturing process, and the like. (Octyl, dodecyl type), anionic activators such as alkyl sulfates, etc. are preferably used alone or as a mixture, and the amount to be applied varies depending on the required performance, but is usually 0 with respect to the dry weight of the target sheet. It is desirable that the content is about 1 to 2.0% by weight, particularly about 0.2 to 1.0% by weight.

In order to mix the antibacterial agent 13 in the fiber treatment agent with the fiber treatment agent 11, the solid or semi-solid fiber treatment agent 11 is heated at room temperature to increase its fluidity, and then the antibacterial agent 13 in the fiber treatment agent 13 is mixed. To mix. Then, this mixed solution is coated on the sheet material by a predetermined method.

As the antibacterial agent, an inorganic antibacterial agent such as gold, silver, copper, platinum, iron or zinc, an organic antibacterial agent such as benzalkonium chloride, benzethonium chloride or cetylpyridinium chloride can be used. The inorganic antibacterial agent has a property of having a lower water solubility than an organic antibacterial agent.

In particular, as the antibacterial agent 12 in the fiber to be kneaded into the fiber 10, it is preferable to use an antibacterial agent having a poor solubility in water so that it is difficult to elute by urination and easily stays in the fiber 10. Further, as the antibacterial agent 13 in the fiber treatment agent to be mixed with the fiber treatment agent 11, a water-soluble antibacterial agent is used so that it can be easily eluted by urination and easily mixed and diffused in the urine. preferable. The above-mentioned antibacterial agent which is poorly soluble in water is an antibacterial agent having low water solubility, and specifically, it is preferable to use the above-mentioned inorganic antibacterial agent. The water-soluble antibacterial agent is a highly water-soluble antibacterial agent, and specifically, it is preferable to use the organic antibacterial agent.

5 and 6 are schematic views of cross sections of the urine absorbing pad 1 and the fibers, respectively, showing the states before and after urination. In the embodiment shown in FIG. 5, the surface sheet 3 is made of an antibacterial non-woven fabric. When urine passes through the antibacterial non-woven fabric (surface sheet 3) by urination, the fiber treatment agent 11 adhering to the surface of the fibers 10 constituting the antibacterial non-woven fabric and the antibacterial agent 13 in the fiber treatment agent contained therein Withdraws from fiber 10 and dissolves in urine. The urine in which the antibacterial agent 13 is dissolved in the fiber treatment agent permeates the second sheet 8 and the encapsulating sheet 9 and is absorbed and retained by the absorber 4. Since the antibacterial agent 13 in the fiber treatment agent is dissolved in the urine that has permeated the second sheet 8, the encapsulating sheet 9, and the absorber 4, the antibacterial effect of the antibacterial agent is exhibited and no foul odor is generated. On the other hand, since the antibacterial agent 12 in the fiber is supported by being kneaded into the fiber 10, it remains supported in the fiber 10 and is absorbed by the surface sheet 3 or the wearer's skin. It exerts an antibacterial effect against body fluids existing near the wearer's skin surface, such as body fluids adhering to the surface. In this way, the antibacterial agent 13 in the fiber treatment agent and the antibacterial agent 12 in the fiber exert antibacterial effects in different forms, whereby the generation of foul odor due to urination is surely suppressed, and the antibacterial effect of the antibacterial agent is sufficiently suppressed. You will be able to demonstrate it.

On the other hand, in the conventional absorbent article provided with the antibacterial agent, as shown in FIG. 7, the antibacterial agent is overcoated on the surface of the fiber to which the fiber treatment agent is attached to the surface. Because it is coated with urine, the antibacterial agent and fiber treatment agent run off, the antibacterial agent does not remain on the surface sheet, and the body fluid absorbed by the surface sheet and the body fluid adhering to the wearer's skin cause a foul odor. There was a risk of it occurring.

Further, in the conventional absorbent article provided with an antibacterial agent, as described above, the surface of the fiber to which the fiber treatment agent is attached is coated so that the fiber treatment agent is overcoated with the antibacterial agent. The overcoated antibacterial agent may hinder the effect of the fiber treatment agent and deteriorate the absorption performance. On the other hand, in the urine absorbing pad 1 according to the present invention, since the antibacterial agent 13 in the fiber treatment agent is mixed with the fiber treatment agent 11 adhering to the surface of the fiber 10, the fiber treatment agent 11 is arranged. The effect of the above is not impaired, and the absorption performance is not deteriorated.

From the viewpoint of surely exerting such an effect, the amount of the antibacterial agent remaining on the antibacterial nonwoven fabric after urination is larger than the amount of the antibacterial agent eluted from the antibacterial nonwoven fabric (surface sheet 3) with urination. It is preferable to configure the number so as to increase. As a result, even after urination, many antibacterial agents are arranged near the wearer's skin surface, and the antibacterial effect can be maintained at a position close to the skin surface, resulting in more hygiene. Such a configuration can be achieved by appropriately adjusting the content of the antibacterial agent 12 in the fiber and the content of the antibacterial agent 13 in the fiber treatment agent. Specifically, it is preferable that the content of the antibacterial agent 12 in the fiber contained in the unit volume of the antibacterial nonwoven fabric is larger than the content of the antibacterial agent 13 in the fiber treatment agent. As a result, even if the antibacterial agent 13 in the fiber treatment agent is eluted from the antibacterial non-woven fabric in a predetermined portion by urination, the amount of the antibacterial agent 12 in the fiber is larger than the amount of the antibacterial agent 13 in the eluted fiber treatment agent in the fiber 10. Will stay in.

1 ... Urine absorbing pad, 2 ... Leakage-proof sheet, 3 ... Surface sheet, 4 ... Absorber, 5 ... Exterior sheet, 6 ... Side non-woven fabric, 7 ... Filamentous elastic elastic member, 8 ... Second sheet, 9 ... Encapsulation sheet, 10 ... Fiber, 11 ... Fiber treatment agent, 12 ... Antibacterial agent in fiber, 13 ... Antibacterial agent in fiber treatment agent

Claims (9)

In an absorbent article containing an absorber
An antibacterial non-woven fabric composed of fibers having a fiber treatment agent attached to the surface and an antibacterial agent is arranged on the skin side of the absorber.
An absorbable article, wherein the antibacterial agent comprises an antibacterial agent in a fiber kneaded into the fiber and an antibacterial agent in the fiber treatment agent mixed with the fiber treatment agent. The absorbent article according to claim 1, wherein the fiber treatment agent is a hydrophilic agent. A surface sheet that comes into contact with the wearer's skin surface is arranged on the skin side of the absorber.
The absorbent article according to any one of claims 1 and 2, wherein at least a part of the surface sheet is made of the antibacterial non-woven fabric. A surface sheet that comes into contact with the wearer's skin surface is disposed on the skin side of the absorber, and a second sheet is disposed between the surface sheet and the absorber.
The absorbent article according to any one of claims 1 to 3, wherein at least a part of the second sheet is made of the antibacterial non-woven fabric. The absorber is surrounded by an encapsulating sheet,
The absorbent article according to any one of claims 1 to 4, wherein at least a part of the encapsulating sheet arranged on the skin side of the absorbent body is made of the antibacterial non-woven fabric. The absorption according to any one of claims 1 to 5, wherein the amount of the antibacterial agent remaining on the antibacterial nonwoven fabric after the discharge of the body fluid is larger than the amount of the antibacterial agent eluted from the antibacterial nonwoven fabric with the discharge of the body fluid. Sex goods. The absorbent article according to any one of claims 1 to 6, wherein the antibacterial agent in the fiber is made of an antibacterial agent which is poorly soluble in water, and the antibacterial agent in the fiber treatment agent is made of an antibacterial agent which is soluble in water. The absorbent article according to claim 7, wherein the antibacterial agent that is sparingly soluble in water is an inorganic antibacterial agent, and the antibacterial agent that is soluble in water is an organic antibacterial agent. The absorbent article according to any one of claims 1 to 8, wherein the antibacterial non-woven fabric is provided in a portion corresponding to a body fluid draining portion of the wearer, and the antibacterial non-woven fabric is not provided in other portions.

Images