JP6245916B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article such as an incontinence pad, a disposable diaper, and a sanitary napkin, and more particularly to a deodorization technique for the absorbent article.

  Absorbent articles such as incontinence pads, disposable diapers, and sanitary napkins absorb and retain body fluids such as urine and menstrual blood excreted from the body. In such an absorbent article, the odor emanating from the bodily fluid held in the absorbent body may diffuse outside the absorbent article. Therefore, an absorbent article having a deodorizing function has been proposed.

  For example, in Patent Document 1, an antibacterial agent that does not contain metal ions or an antibacterial agent that contains metal ions in a state in which they are not substantially dissolved in water, and activated carbon are disposed between the absorbent core and the top sheet. An absorbent article is described (see Patent Document 1 (Claim 1)). Patent Document 2 discloses an absorbent article having a liquid-permeable surface layer, a liquid-impermeable leak-proof layer, and a liquid-retaining absorbent layer interposed between both layers. It has water vapor permeability, and the absorbent layer includes a deodorizing sheet containing an odor control agent, and the deodorizing sheet is disposed on the most leak-proof layer side of the absorbent layer and An absorbent article that occupies 50% or more of the total area of the absorbent layer on the leakage preventing layer side is described (see Patent Document 2 (Claim 1)).

JP 2006-191966 A JP 2000-350745 A

  In Patent Documents 1 and 2, activated carbon is also disposed between the absorbent core and the top sheet. However, when the activated carbon is arranged on the skin side of the absorbent core in this way, the activated carbon gets wet by the body fluid, and the deodorizing performance is deteriorated. In addition, the presence of activated carbon slows the body fluid flow rate, and thus delays the absorption of the body fluid by the absorber. This invention is made | formed in view of the said situation, and it aims at providing the absorbent article which has the outstanding deodorizing performance.

The absorbent article of the present invention that has solved the above problems is a liquid-permeable top sheet disposed on the skin surface side, a liquid-impermeable back sheet disposed on the outer surface side, and the top sheet. And the deodorizing sheet, the deodorizing sheet is disposed only on the outer surface side of the absorber, and the deodorizing sheet has a specific surface area of 500 m. ² / g-2000m < ² > / g activated carbon is contained, It is characterized by the above-mentioned.

  The absorbent article of the present invention includes a deodorizing sheet containing activated carbon, and can absorb the odor released from the body fluid absorbed by the absorbent body by the deodorizing sheet. Moreover, since the adsorption sheet is arrange | positioned at the outer surface side of the absorber, the spreading | diffusion of the odor to the outer surface of an absorbent article can be suppressed more effectively. Moreover, since the activated carbon in the deodorizing sheet is not wetted by body fluids, the deodorizing performance of the activated carbon can be sufficiently exhibited. Furthermore, in the absorbent article of the present invention, since the deodorizing sheet is disposed only on the outer surface side of the absorber, body fluid discharged from the user by the activated carbon in the deodorizing sheet is absorbed by the absorber. Is not disturbed.

The deodorizing sheet is preferably a mixed paper containing activated carbon and a fiber base material. Loading of the activated carbon of the deodorizing sheet ^is preferably ^{0.1g / m 2 ~10g / m 2} . As the absorbent article of the present invention, a disposable or pants-type disposable diaper is suitable.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which has the outstanding deodorizing performance can be provided.

The top view (development figure) of an example of the absorbent article of this invention. The typical sectional view of the II line of Drawing 1. FIG. 2 is a schematic cross-sectional view taken along line II-II in FIG. 1. The typical sectional view of another example of the absorptive article of the present invention.

The absorbent article of the present invention is a liquid-permeable top sheet disposed on the skin surface side, a liquid-impermeable back sheet disposed on the outer surface side, and disposed between the top sheet and the back sheet. absorption body and has a deodorizing sheet, wherein are arranged deodorizing sheet only on the outer surface side of the absorbent body, the deodorizing sheet, a specific surface area of 500m 2 ^/ g~2000m 2 ^{/ g} It contains activated carbon.

  The deodorizing sheet used in the present invention contains activated carbon. The activated carbon is a porous carbonaceous material having a specific surface area increased by subjecting a carbon raw material such as charcoal or coconut to steam activation and / or alkali activation to form a large number of pores.

The specific surface area of the activated carbon is 500 m ² / g or more, preferably 700 m ² / g or more, more preferably 1000 m ² / g or more. If the specific surface area is 500 m ² / g or more, it becomes easy to adsorb odors and moisture. Although the upper limit of the specific surface area of the activated carbon is not particularly limited, it is usually 2000 m ² / g.

  The form of the activated carbon is not particularly limited, and either granular or fibrous can be used. When using granular activated carbon, the volume average particle diameter should just adjust according to the thickness and specific surface area of a deodorizing sheet, and 1 micrometer-20 micrometers are preferable normally. The average pore diameter and pore volume of the activated carbon may be adjusted according to the desired absorption performance.

  The deodorizing sheet is not particularly limited as long as it contains activated carbon. Examples of the deodorizing sheet include a sheet in which activated carbon is wrapped with a breathable sheet base material; a sheet in which activated carbon is fixed to a breathable sheet base material; a mixed paper containing activated carbon and a fiber base material; . Examples of the breathable sheet include a point bond nonwoven fabric, an air-through nonwoven fabric, a spunlace nonwoven fabric, and a spunbond nonwoven fabric. Examples of the fiber base material include polyolefin fibers such as polyethylene and polypropylene, and heat fusion fibers such as polyester fibers and composite fibers.

  It is preferable that the deodorizing sheet contains activated carbon uniformly over the entire surface. Since the bias of the activated carbon can be suppressed, the deodorizing sheet is preferably a deodorizing sheet in which activated carbon is fixed to a breathable sheet base material, or a mixed paper containing activated carbon and a fiber base material. In addition, mixed paper is more preferable because the amount of the binder used for fixing the activated carbon can be further reduced. As the amount of the binder used is smaller, the pores of the activated carbon are less likely to be blocked, the deodorizing performance is further improved, and the breathability of the deodorizing sheet is further improved.

Loading of the activated carbon of the deodorizing sheet, 0.1 g / ^{m 2} or more, more preferably 1 g / ^{m 2} or more, still more preferably 2 g / ^{m 2} or more, preferably 10 g / ^{m 2} or less, more Preferably it is 9 g / m ² or less, more preferably 8 g / m ² or less. If the loading is 0.1 g / m ² or more, the deodorizing performance is further improved, and if it is 10 g / m ² or less, the air permeability is good.

  The air resistance value of the deodorizing sheet is preferably 1.0 kPa · s / m or more, and preferably 25.0 kPa · s / m or less. If the ventilation resistance value is 25.0 kPa · s / m or less, the moisture in the absorbent article easily passes through the deodorizing sheet and is released to the outside.

  The top sheet is disposed on the most wearer side of the absorbent article and quickly captures the body fluid of the wearer and moves it to the absorbent body. As the top sheet, a liquid-permeable sheet material, for example, a nonwoven fabric formed of hydrophilic fibers can be used. Nonwoven fabrics used as the top sheet are, for example, point bond nonwoven fabrics, air-through nonwoven fabrics, spunlace nonwoven fabrics, and spunbond nonwoven fabrics, and cellulose, rayon, cotton, etc. are usually used as hydrophilic fibers forming these nonwoven fabrics. . In addition, as the top sheet, a liquid-permeable nonwoven fabric formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide) whose surfaces are hydrophilized with a surfactant may be used.

  The absorber can absorb body fluid. The absorber is composed of at least one absorption layer. The absorbent layer preferably contains the water absorbent resin powder as a water absorbent material. The absorbent layer may further contain water-absorbing fibers as a water-absorbing material. As the water absorbent resin powder, those conventionally used for absorbent articles can be used. The water-absorbent resin powder contains additives such as preservatives, fungicides, antibacterial agents, antioxidants, ultraviolet absorbers, colorants, fragrances, deodorants, inorganic powders and organic fibrous materials. Can do. Examples of the water absorbent fiber include pulp fiber, cellulose fiber, rayon, and acetate fiber. The absorbent layer may contain a fiber base material in addition to the water absorbent resin powder. Examples of the fiber base material include heat fusion fibers. The heat-fusible fiber is used for improving shape retention. Specific examples of the heat-sealing fiber include polyolefin fibers such as polyethylene and polypropylene, polyester fibers, and composite fibers. The absorbent layer containing only the water absorbent resin powder as the water absorbent material can be thinned. The absorption layer containing a fiber base material is excellent in dispersibility of body fluids.

  The absorbent layer is, for example, fixed to a paper sheet such as tissue paper or a liquid-permeable non-woven sheet mixed with a hydrophilic fiber aggregate layer such as pulverized pulp fiber or cellulose fiber mixed with granular water-absorbing resin powder. Or it wraps with these liquid-permeable nonwoven fabric sheets, and it obtains by shape | molding in predetermined shapes, such as a rectangle, an hourglass type, a gourd type, a battledore type.

  The planar view shape of the water absorption layer and the absorber is not particularly limited, and examples thereof include a rectangular shape, an hourglass shape, a gourd shape, and a battledore shape. Moreover, the absorber may have an adhesive layer for fixing the water absorbent resin powder in addition to the water absorbing layer.

  The back sheet is disposed on the outermost surface side of the absorbent article and prevents body fluid and the like from leaking to the outside. Examples of the liquid-impervious sheet used for the back sheet include a water-repellent or liquid-impervious nonwoven fabric (for example, spanned) formed of hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon). Bonded nonwoven fabrics, meltblown nonwoven fabrics, SMS (spunbond / meltblown / spunbond) nonwoven fabrics) and water-repellent or liquid-impervious plastic films are used, and body fluid that reaches the liquid-impervious sheet is outside the absorbent article. Prevent exudation. When a plastic film is used for the liquid-impermeable sheet, it is preferable to use a plastic film having moisture permeability (breathability) from the viewpoint of preventing stuffiness and improving wearer's comfort. Moreover, you may arrange | position a paper sheet between a plastic film and an absorber for the further diffusibility provision and shape stability.

  Next, a specific application example of the absorbent article of the present invention will be described. Examples of the absorbent article of the present invention include absorbent articles used for absorbing bodily fluids discharged from the human body such as disposable diapers, incontinence pads, and sanitary napkins.

  Hereinafter, the absorbent article of this invention is demonstrated based on the aspect of a disposable diaper. One aspect of the disposable diaper of the present invention includes a liquid-permeable top sheet, a liquid-impervious back sheet, and an absorbent body and an absorbent between the liquid-permeable top sheet and the liquid-impervious back sheet. An embodiment in which an odor sheet is provided and the deodorizing sheet is disposed only on the outer surface side of the absorber can be mentioned. The liquid-impermeable back sheet preferably has moisture permeability. In addition, you may arrange | position the liquid-impermeable sheet | seat which has moisture permeability between an absorber and a deodorizing sheet. Moreover, the side sheet | seat may be provided in the width direction both sides of the said liquid-permeable top sheet as needed. The side sheet is bonded to the upper part of both side edges in the width direction of the top sheet, and the side sheet inward from the bonding point forms a pair of rising flaps along both side edges of the absorbent body.

  As another aspect of the absorbent article of the present invention, a laminated body composed of an inner sheet and an outer sheet, a liquid-permeable top sheet, a liquid-impermeable back sheet, and these on the skin surface side of the laminated body There can be mentioned an embodiment in which an absorbent body and a deodorizing sheet are provided therebetween, and the deodorizing sheet is disposed only on the outer surface side of the absorbent body. In this case, the laminate composed of the inner sheet and the outer sheet corresponds to the exterior sheet material. In addition, you may arrange | position the liquid-impermeable sheet | seat which has moisture permeability between an absorber and a deodorizing sheet. A pair of rising flaps may be formed along the both side edges of the absorbent body at the upper part of both side edges in the width direction of the liquid-permeable top sheet.

  About the name of each part of a disposable diaper, when wearing a diaper, the part applied to the wearer's abdomen is referred to as the front abdomen, the part applied to the wearer's buttocks is referred to as the back part, the front part and the back part A portion located between the two and applied to the wearer's crotch is referred to as a crotch portion. The crotch is a part located in the middle of the diaper front and back, unfolding the front abdomen and back of the diaper body and split into three parts in the diaper front-rear direction. It means the part where both side edges are not joined. The front-rear direction of the diaper means the direction from the front to the back of the diaper, and the width direction of the diaper is the same surface as the diaper in a state where the front and back of the diaper are unfolded and flattened. It is on and means a direction perpendicular to the front-rear direction.

  The disposable diaper (absorbent article) includes a front abdomen, a back part, and a crotch part positioned between them, and the front abdomen and the back part are joined at the side edges to form a pair with the waist opening. Either a pants type in which a leg opening is formed or a development type in which a front abdomen and a back part are bonded together with a fastening tape or the like may be used.

  The sheet material constituting the exterior sheet material is preferably a liquid-impervious or water-repellent non-woven fabric from the viewpoint of leakage prevention, and is formed of, for example, hydrophobic fibers (for example, polypropylene, polyethylene, polyester, polyamide, nylon). Examples thereof include water-repellent or liquid-impervious nonwoven fabrics (for example, spunbond nonwoven fabrics, meltblown nonwoven fabrics, SMS (spunbond / meltblown / spunbond) nonwoven fabrics), and water-repellent or liquid-impervious plastic films. These liquid-impermeable or water-repellent nonwoven fabrics have moisture permeability. When a plastic film is used for the exterior sheet material, it is preferable to use a plastic film having moisture permeability (breathability) from the viewpoint of preventing stuffiness and improving the comfort of the wearer.

  The disposable diaper (absorbent article) is preferably provided with an elastic member for waist along the waist opening edge of the front part or the back part. The waist elastic member makes it difficult for leakage of excrement such as urine from the back side or the abdomen side even when the wearer is sleeping. A plurality of waist elastic members may be provided.

  The disposable diaper (absorbent article) is preferably provided with a leg elastic member along the leg opening edge. Leakage of excrement such as urine from the leg opening edge is prevented by the leg elastic member. In addition, a leg opening edge means the edge around the leg opening part of a disposable diaper. A plurality of leg elastic members may be provided.

  In the disposable diaper (absorbent article), a plurality of waist elastic members are preferably provided in the diaper body width direction on the front and / or back. The fit around the lower abdomen and the buttocks of the diaper is improved by the elastic member for the waist.

  Each elastic member can be an elastic stretchable material that is normally used for disposable diapers such as polyurethane yarns, polyurethane films, and natural rubber. Each elastic member is preferably fixed to the exterior sheet material and / or the surface sheet material with a hot melt adhesive in an extended state. As the hot melt adhesive, a rubber-based hot melt adhesive is preferable.

  A liquid-impermeable side sheet may be provided at both side edges in the width direction of the liquid-permeable top sheet. The liquid-impervious side sheet preferably constitutes a rising flap. The rising flap prevents lateral leakage of urine and the like, and quickly moves the water of excrement to the absorber.

  It is preferable that an elastic member for standing is provided at an end of the rising flap (end on the wearer side). A rising flap that rises toward the wearer is formed by the contraction force of the standing elastic member, and side leakage of urine and the like is prevented.

  Hereinafter, although the absorbent article of this invention is demonstrated, referring drawings, this invention is not limited to the aspect shown by drawing.

  1 is a plan view (development view) of an example of the absorbent article of the present invention, FIG. 2 is a schematic cross-sectional view taken along line II in FIG. 1, and FIG. 3 is a schematic cross-sectional view taken along line II-II in FIG. FIG. 4 is a schematic cross-sectional view of another example of the absorbent article of the present invention. 1-4, the arrow A shows the length direction of an absorbent article, the arrow B shows the width direction of an absorbent article, the upper side of the C direction of a paper surface is a skin surface side, and the lower side is an outer surface side.

  In FIG. 1, an example of the underpants type disposable diaper (absorbent article) of this invention was shown (development figure). The pants-type disposable diaper 1 has a front part 2 and a back part 3 in the length direction A, and has a crotch part 4 between the front part 2 and the back part 3. The front abdomen 2 is in contact with the wearer's abdomen, and the back part 3 is in contact with the wearer's buttocks. The crotch part 4 is provided with a notch 5 along the circumference of the wearer's leg. In the pants-type disposable diaper 1 of FIG. 1, the side edge 2a of the front part 2 and the side edge 3a of the back part 3 are joined, and it becomes the pants-type disposable diaper 1 which has a waist opening part and a pair of leg opening part.

  The pants-type disposable diaper 1 has an absorbent main body 20 attached to the skin surface side of the exterior sheet material 6. The absorbent main body 20 extends along the length direction A from the center of the crotch portion 4.

  A front waist elastic member 8 and a rear waist elastic member 9 are attached to the pants-type disposable diaper 1 along the edge 7 of the exterior sheet material 6 in a state of being stretched in the width direction B. Further, along the notch 5, the front leg elastic member 10 and the rear leg elastic member 11 are attached in an extended state. A state where the front waistline elastic member 12 and the back waistline elastic member 13 are extended in the width direction B between the waist elastic member and the leg elastic member in each of the front abdominal part 2 and the back back part 3. It is attached with. The pants-type disposable diaper 1 fits the wearer by contraction of each elastic member.

  FIG. 2 is a diagram schematically illustrating a cross section taken along line II of the pant-type disposable diaper of FIG. With reference to FIG. 2, the structure of the underpants type disposable diaper 1 is demonstrated. The exterior sheet material 6 includes an outer sheet 6a and an inner sheet 6b, and elastic members 8 and 9 for the waist, elastic members 10 and 11 for the legs, and elastic members 12 and 13 for the waistline are stretched between the two sheets. It is attached with. The outer sheet 6a is longer in the length direction than the inner sheet 6b, and is folded back to the inner surface side (skin surface side) at the end edge 7 to form a folded portion 14.

  An absorbent main body 20 is attached to the skin surface side of the exterior sheet material 6. The absorbent main body 20 includes an absorbent body 21, a top sheet 22 made of a nonwoven material disposed on the skin surface side of the absorbent body 21, and a liquid-impermeable back sheet 23 provided on the outer surface side of the absorbent body 21. The deodorizing sheet 24 is disposed between the absorber 21 and the back sheet 23. The absorbent body 21 is composed of an absorbent layer containing a water absorbent resin powder 25 and a fiber base material 26. The deodorizing sheet 24 is composed of mixed paper containing activated carbon 27 and a fiber base material 26. In the pants-type disposable diaper 1, a front end press sheet 15 and a rear end press sheet 16 are provided so as to cover the lengthwise ends of the absorbent main body 20 at the front abdomen 2 and the back part 3 of the inner surface of the inner sheet 6 b. ing.

  FIG. 3 is a diagram schematically illustrating a cross section taken along line II-II of the pants-type disposable diaper of FIG. As shown in FIG. 3, a side sheet 17 made of a non-woven material is joined to the top of both side edges in the width direction of the top sheet 22 made of a non-woven material. The side seat 17 forms a rising flap that stands up toward the wearer's skin by the contraction force of the elastic member 18 attached in a stretched state in the length direction, and serves as a barrier that prevents lateral leakage of urine and the like. .

  FIG. 4 is a schematic cross-sectional view illustrating another preferred embodiment of the disposable diaper 1. The pants-type disposable diaper 1 includes a liquid-permeable top sheet 22, a liquid-impervious back sheet 23, an absorbent body 21 between the liquid-permeable top sheet 22 and the liquid-impervious back sheet 23, and A deodorizing sheet 24 is provided. A liquid-impervious side sheet 17 is joined to upper portions of both side edges of the liquid-permeable top sheet 22. The side sheet 17 inward from the joining point 19 forms a rising flap that rises toward the wearer's skin. The side sheet outside the joining point 19 extends outward from the side edge of the absorber 21 and is joined to the back sheet 23. The surface sheet material includes a liquid-permeable top sheet 22 and a liquid-impermeable side sheet 17. The exterior sheet material includes a liquid-impermeable back sheet 23. 2 to 4, the same components as those in FIG. 1 are denoted by the same reference numerals and description thereof is omitted.

  Specific examples of the absorbent article of the present invention include absorbent articles used for absorbing bodily fluids discharged from the human body, such as disposable diapers, sanitary napkins, and incontinence pads.

  Hereinafter, the present invention will be described in detail by way of examples. However, the present invention is not limited to the following examples, and all modifications and embodiments without departing from the gist of the present invention are not limited thereto. Included in range.

1. Evaluation Method (1) Specific Surface Area The specific surface area of the activated carbon was measured by a flow type specific surface area automatic measuring device (manufactured by Shimadzu Corporation, “Flowsorb III 2310”, BET method).

(2) Air permeability resistance value of deodorant sheet The air resistance value of the deodorant sheet was measured using an air permeability tester ("KES-F8-AP1" manufactured by Kato Tech Co.). A stack of 32 air permeable sheets was used as a test piece, and the pressure loss at a constant flow rate (4 ml / cm ² / sec) was measured. The measurement was performed 3 times, and the average value was calculated.

(3) Deodorizing effect test The deodorizing effect was evaluated by a sensory test. Specifically, 5 ml of human urine was poured into the absorbent article from the surface sheet side and then put into a sealed container. This sealed container was stored in a thermostatic chamber set at 37 ° C., and the odor was confirmed at the start of storage (0 hour) and when the storage time was 0.5 hours, 1 hour and 3 hours. It was evaluated with a 6-point score of ~ 5.
<Score>
0: Odorless.
1: Smell can be sensed faintly.
2: The smell of urine can be detected, but the smell is weak.
3: The odor can be easily detected.
4: Strongly smells.
5: Strongly smells.

2. Preparation of deodorant sheet 2-1. Deodorant sheet 1
As a deodorizing sheet, a mixed paper (produced by Daishowa First) containing activated carbon and pulp fiber was prepared. This deodorizing sheet has an activated carbon loading of 2.0 g / m ² , a specific surface area of activated carbon of 900 m ² / g, a thickness of the deodorizing sheet of 0.1 mm, and an air resistance of 9.2 kPa · s / m.

3. Production of absorbent article 3-1. Absorbent article 1
The deodorizing sheet 1 was arrange | positioned on the liquid-impermeable film (made of polyethylene (PE)) which has air permeability as a back sheet. An absorbent body was formed on the deodorizing sheet 1. The absorbent is laminated with fluff pulp (weight per unit area: 200 g / m ² ) on the deodorant sheet 1, laminated with tissue paper, and further laminated with fluff pulp (weight per unit area: 200 g / m ² ), It was formed by laminating tissue paper. On the absorbent body, an air-through unemployed cloth (weight per unit area: 18 g / m ² ) was stacked as a top sheet to prepare a laminate. The laminate was cut into a square shape (5 cm × 5 cm square), and the periphery was joined with craft tape to obtain an absorbent article 1.

3-2. Absorbent article 2
A tissue paper was laminated on a liquid-impermeable film (made of polyethylene (PE)) having air permeability as a back sheet, and fluff pulp (weight per unit area: 200 g / m ² ) was laminated thereon. Subsequently, the deodorizing sheet 1 was laminated | stacked on the fluff pulp. After laminating fluff pulp (weight per unit area: 200 g / m ² ) on the deodorizing sheet 1, an air-through unwoven cloth (weight per unit area: 18 g / m ² ) is stacked thereon as a top sheet to produce a laminate. did. The laminate was cut into a square shape (5 cm × 5 cm square), and the periphery was joined with craft tape to obtain an absorbent article 2.

3-3. Absorbent article 3
A tissue paper was laminated on a liquid-impermeable film (made of polyethylene (PE)) having air permeability as a back sheet, and fluff pulp (weight per unit area: 200 g / m ² ) was laminated thereon. A tissue paper was further laminated on the flap pulp, and a fluff pulp (weight per unit area: 200 g / m ² ) was laminated thereon. The deodorizing sheet 1 was laminated on the flap pulp, and an air-through unemployed cloth (weight per unit area: 18 g / m ² ) was laminated thereon as a top sheet to produce a laminate. The laminate was cut into a square shape (5 cm × 5 cm square), and the peripheral portion was joined with a kraft tape to obtain an absorbent article 3.

3-4. Absorbent article 4
A tissue paper was laminated on a liquid-impermeable film (made of polyethylene (PE)) having air permeability as a back sheet, and fluff pulp (weight per unit area: 200 g / m ² ) was laminated thereon. Activated carbon (specific surface area: 900 m ² / g, basis weight: 1.0 g / m ² ) was sprayed on the flap pulp. Thereafter, fluff pulp (weight per unit area: 200 g / m ² ) was further laminated, tissue paper was laminated, and then an air-through unwoven cloth (weight per unit area: 18 g / m ² ) was stacked as a top sheet to prepare a laminate. The laminate was cut into a square shape (5 cm × 5 cm square), and the periphery was joined with craft tape to obtain an absorbent article 4.

3-5. Absorbent article 5
A tissue paper was laminated on a liquid-impermeable film (made of polyethylene (PE)) having air permeability as a back sheet, and fluff pulp (weight per unit area: 200 g / m ² ) was laminated thereon. Charcoal powder (specific surface area: 300 m ² / g, basis weight: 1.0 g / m ² ) was sprayed on the flap pulp. Thereafter, fluff pulp (weight per unit area: 200 g / m ² ) was further laminated, tissue paper was laminated, and then an air-through unwoven cloth (weight per unit area: 18 g / m ² ) was stacked as a top sheet to prepare a laminate. The laminate was cut into a square shape (5 cm × 5 cm square), and the periphery was joined with craft tape to obtain an absorbent article 5.

  The obtained absorbent article was subjected to a deodorizing effect test, and the results are shown in Table 1.

  The absorbent article 1 is a case where a deodorizing sheet made of a mixed paper of activated carbon and a fiber base material is disposed on the outer surface side of the absorbent layer. In this absorbent article 1, the odor intensity after 0.5 hour and 1 hour was smaller than that at the start of the test (0 hour).

  The absorbent article 2 is a case where a deodorizing sheet is disposed in the absorbent layer, and the absorbent article 3 is a case where a deodorizing sheet is disposed on the skin surface side of the absorbent layer. In these absorbent articles 2 and 3, the odor intensity after 0.5 hours is the same as that at the start even though the same deodorizing sheet as that of the absorbent article 1 is used, and 3 hours Later odor intensity is stronger than at the beginning. This is presumably because the activated carbon in the deodorizing sheet was wetted by the body fluid and the pores were blocked, so that the deodorizing performance of the activated carbon was not sufficiently exhibited. The absorbent article 4 and the absorbent article 5 compare the deodorizing performance of activated carbon and charcoal. From these deodorization test results, it can be seen that activated carbon having a high specific surface area is superior in deodorizing performance to charcoal.

  The present invention can be suitably used for, for example, an absorbent article used for absorbing bodily fluids discharged from the human body, and can be particularly suitably used as an absorbent article such as a disposable diaper, a sanitary napkin, and an incontinence pad.

1: Disposable diaper (absorbent article), 2: front abdomen, 3: back of the back, 4: crotch, 5: notch, 10: liquid-permeable nonwoven sheet, 6: exterior sheet material, 7: edge, 8 : Elastic member for front waist, 9: Elastic member for rear waist, 10: Elastic member for front leg, 11: Elastic member for rear leg, 12: Elastic member for front waist, 13: Elasticity for rear waist Member: 15: Front end pressing sheet, 16: Rear end pressing sheet, 17: Side sheet, 18: Elastic member, 19: Joint part, 20: Water-absorbing body, 21: Absorber, 22: Liquid-permeable top sheet , 23: liquid-impermeable back sheet, 24: deodorant sheet, 25: water absorbent resin powder, 26: fiber base material, 27: activated carbon

Claims (4)

A liquid-permeable top sheet disposed on the skin surface side, a liquid-impermeable back sheet disposed on the outer surface side, and an absorbent body and a deodorizing sheet disposed between the top sheet and the back sheet And
The deodorizing sheet is disposed only on the outer surface side of the absorber,
The deodorizing sheet, a mixed paper having a specific surface area containing a 500m ² / g~2000m ² / g of activated carbon and fibrous substrates,
An air-permeable resistance value of the deodorizing sheet is 1.0 kPa · s / m to 25.0 kPa · s / m . The absorbent article according to claim 1, wherein a liquid-impermeable sheet having moisture permeability is disposed between the absorbent body and the deodorant sheet . The supported amount of activated carbon deodorizing sheet, the absorbent article according to claim 1 or 2 is ^{0.1g / m 2 ~10g / m 2} .   The absorbent article according to any one of claims 1 to 3, wherein the absorbent article is an unfolded or pants-type disposable diaper.

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