JP7311132B2 - sanitary absorbent - Google Patents

Description

The present invention relates to sanitary absorbent articles for absorbing liquids such as sanitary napkins, light incontinence pads, panty sheets and breast milk absorbent pads.

2. Description of the Related Art In recent years, various sanitary absorbent devices for absorbing liquid excrement discharged by a wearer, such as sanitary napkins, light incontinence pads, panty sheets and breast milk absorbent pads, have been developed. Patent Document 1 discloses a sanitary absorbent article including a liquid-permeable surface-side sheet, a water-absorbing layer for retaining body fluids absorbed through the surface-side sheet, and a water-impermeable back-side sheet, wherein the water-absorbing layer It is described that a water-conducting layer is provided in contact with the water-conducting layer, and body fluid is absorbed in a wide range of the water-absorbing layer by the water-conducting layer.

Further, in Patent Document 2, a water-permeable front side sheet, a water-impermeable back side sheet laminated to the front side sheet, and a water-absorbing absorbent provided between the front side sheet and the back side sheet. In a sanitary absorbent article containing Gradual absorption into absorbent material is described.

JP-A-2006-14792 JP-A-2006-6613

In the prior art sanitary absorbent devices described in Patent Documents 1 and 2, the surface of the front sheet or the surface of the front sheet that contacts the wearer's skin is moistened by liquid such as bodily fluid discharged from the wearer. If the surface comes into contact with the wearer, it may cause discomfort to the wearer. In addition, wearers with allergies such as so-called sensitive skin or skin diseases such as atopic dermatitis should not use the front sheet or the front sheet when the front sheet or the front sheet is made of synthetic fibers. Even in a non-moistened state, contact of the surface side sheet or the surface side sheet with the skin may cause adverse effects such as itching and rashes, resulting in discomfort.

When the surface side sheet or the front side sheet is made of synthetic fibers, body fluid discharged from the wearer permeates the front side sheet or the front side sheet, is quickly retained in the absorbent part such as the water absorbing layer and the absorbent material, and is Although the sheet or top sheet is not wet, wearers with dry skin or skin diseases such as atopic dermatitis should use the top sheet made of synthetic fibers when the skin is dry or the temperature is low. Alternatively, when the front sheet touches the wearer's skin, it feels cold. When the front sheet or the front sheet made of synthetic fibers comes into contact with the wearer's skin in hot and humid weather, the wearer's skin becomes stuffy, which easily causes skin stress. In addition, since the synthetic fibers are elongated and straight, when the front sheet or the front sheet touches the wearer's skin, the tips of the fibers irritate the skin, causing discomfort due to skin stress such as prickling. likely to occur.

SUMMARY OF THE INVENTION An object of the present invention is to provide a sanitary absorbent device which has very little effect on the wearer's skin and is less likely to cause discomfort due to skin stress.

In the description of the present invention below, for convenience of understanding, in parentheses ( ), the section of the detailed description of the invention, the reference numerals of the corresponding components in the drawings, and the paragraph [ ] may also be described.
The present invention will be described primarily with reference to FIGS. 1-3:
a surface sheet 11 made of a nonwoven fabric made of cotton fibers and having hydrophilicity;
b a back sheet 12 having liquid impermeability and stacked on the back side of the top sheet 11;
(c) including an absorbent body 14 made of water-absorbing cotton-like fibers,
d the topsheet 11 has a topsheet edge 17 (FIGS. 1 and 3),
The edge 17 of the top sheet 17 extends both in the width direction (horizontal direction in FIGS. 1 and 3) perpendicular to the longitudinal direction of the top sheet 11 and the back sheet 12 (the direction perpendicular to the plane of FIG. 3) (left and right in FIG. 3). ), extending in said longitudinal direction of the top sheet 11,
e the backsheet 12 has a backsheet edge 19 (FIGS. 1, 3);
The edge portion 19 of the back sheet is positioned outward in the width direction (left and right direction in FIGS. 1 and 3) from the edge portion 17 of the top sheet (both left and right in FIG. 3). extending to the right (both left and right in FIG. 3) and extending in the longitudinal direction of the backsheet 12;
f The top sheet 11 and the back sheet 12 are
f1 The absorber 14 is accommodated between the topsheet 11 and the backsheet 12 except for the backsheet edge 19 (paragraph [0012]), and the topsheet edge 17 of the topsheet 11 is stacked on the absorber 14 is,
f2 the top sheet edge 17 of the top sheet 11 is located inside the absorber 14 in the width direction (left side in FIG. 1),
g. A protective sheet 21 (Fig. 1) made of cotton fiber and made of water-repellent nonwoven fabric is provided along the longitudinal direction (paragraph [0031]), and the protective sheet 21 (Fig. 1)
g1 a junction,
Extending inward in the width direction (to the left in FIG. 1) from the back sheet edge 19 to the top sheet edge 17, and stacked on the front side of the back sheet edge 19 and the front side of the top sheet edge 17. a joint portion (paragraph [0012]) that is joined respectively by
g2 is an outward portion,
The joint portion is folded back at the folded portion of the inner end in the width direction (the left end in FIG. 1), and from the folded portion, the outer side in the width direction (the right side in FIG. 1) of the top sheet edge 17 is folded. ) and provided facing the surface side of the joint portion on the top sheet edge 17 without being joined (paragraph [0031]);
g3 From another folded portion folded back at the outer end of the width direction of the outward portion (the right end of the surface sheet 11 in FIG. 1, the left and right outer ends in FIG. 3), the joint portion and the outward an inward portion that extends inward in the width direction (left side in FIG. 1) between the two portions, and is provided facing the back surface side (lower surface side in FIG. 1) of the outward portion without being joined. ,
The outward portion and the inward portion overlap to form two stages, and are rounded and folded at the other folding portion (paragraphs [0056, 0060], FIGS. 1 and 3),
g4 The sanitary absorbent article is characterized in that the protective sheet 21 has no longitudinal elastic thread (FIGS. 1 and 3, paragraphs [0036, 0060, 0064]) .
Further, the present invention
The nonwoven fabric of the protective sheet 21 is characterized by having water repellency by using alkyl ketene dimer (paragraphs [0032, 0051]), which is a water repellent.

The present invention
The cotton fiber 71 (paragraph [0016]) has, on its outer periphery, a primary cell membrane which is a membrane wall of a ring structure composed of bundles of cellulose molecular chains (microfibrils) of epidermal cells. Inside, there is a secondary cell membrane with a spiral fine structure, and in the center of the cotton fiber, a lumen, which is a hollow tube through which nutrients pass during the growth period, is formed. It is characterized by the presence of multiple layers of cellulose layers that constitute the cell membrane, and the presence of water as bound water in the fine gaps of the cellulose layers, which is maintained in a gel state.
The present invention
It is characterized by being one selected from the group of sanitary napkins, light incontinence pads, panty sheets and breast milk absorbent pads.

According to the present invention, the topsheet is made of cotton fibers and is hydrophilic, so that the topsheet can appropriately absorb liquids such as bodily fluids discharged from the wearer. Cotton fibers contain 7 to 10%, preferably 8% to 9%, more preferably 8.5% bound water in the fibers themselves, and the fibers themselves further absorb liquid (free) water, so they are moist. and can suppress excessive release of moisture from the wearer's skin. Since the nonwoven fabric made of cotton fibers has a high heat retaining property, it is possible to suppress the release of the wearer's heat to the outside of the body through the topsheet. Since cotton fiber is used as the surface sheet, when the surface sheet rubs against the wearer's skin, the wearer's skin is less likely to be charged, and the wearer's discomfort due to the discharge of static electricity is suppressed. . The absorber is made of water-absorbing cotton-like fibers and can rapidly absorb body fluids. The protective sheet is made of cotton fiber and is water-repellent. It prevents body fluids excreted from the wearer from leaking out of the sanitary absorbent, and has extremely little effect on the wearer's skin, reducing skin stress. It is possible to provide a sanitary absorbent device that is less likely to cause discomfort due to

1 is a cross-sectional perspective view of part of the sanitary napkin 20a of the first embodiment; FIG. Fig. 3 is a front view of the sanitary napkin 20a; FIG. 3 is a sectional view seen from the section line AA of FIG. 2; 3 is an enlarged view of natural fibers 71-73 and synthetic fiber 79. FIG. FIG. 4 is a diagram showing cotton fibers 71 that make up the nonwoven fabric. 4 is an enlarged view of cotton fiber 71. FIG. 4 is an enlarged view of cotton fiber 71. FIG. 7 is a cross-sectional view of cotton fiber 71. FIG. 4 is an enlarged cross-sectional view of cotton fiber 71. FIG. FIG. 7 is a diagram showing synthetic fibers 79 that make up the nonwoven fabric. 4 is an enlarged view of a synthetic fiber 79; FIG. 4 is an enlarged view of a synthetic fiber 79; FIG. 4 is an enlarged cross-sectional view of a synthetic fiber 79; FIG. FIG. 4 is a diagram schematically showing a process of joining laminated synthetic fibers. FIG. 4 shows a joint where synthetic fibers are joined; FIG. 7 is a cross-sectional view of cotton fibers 71 that have absorbed liquid. Fig. 3 is a front view of the sanitary napkin 20b; FIG. 18 is a sectional view seen from the section line BB in FIG. 17; Fig. 3 is a front view of a state in which the sanitary napkin 20b is attached; Fig. 4 is an enlarged view of a state in which the sanitary napkin 20b is attached; Fig. 3 is a front view of the sanitary napkin 20c; FIG. 22 is a sectional view seen from the section line CC of FIG. 21; It is a front view of sanitary napkin 20d. 24 is a cross-sectional view of the sanitary napkin 20d seen from the cross-sectional line DD of FIG. 23. FIG. It is a figure which shows a triboelectric series. 4 is a graph showing electrical resistance values versus relative humidity of fibers. Fig. 3 is a front view schematically showing the sanitary napkin 50a before being worn by the wearer; Fig. 3 is a front view schematically showing the sanitary napkin 50b after being worn by the wearer; Fig. 3 is a front view schematically showing a state in which a sanitary napkin 20a is worn by a wearer; 4 is a bottom view schematically showing a state in which the sanitary napkin 20a is worn by the wearer. FIG. Fig. 3 is a side view schematically showing a state in which a sanitary napkin 20a is worn by a wearer; FIG. 8 is a cross-sectional view showing the state of cotton fibers 71 of the topsheet 11 of the second embodiment; FIG. 4 is a cross-sectional view showing a state in which cotton fibers 71 are compressed; 4 is a cross-sectional view showing a layer of cotton fibers 71 of the topsheet 11. FIG. Fig. 10 is a front view of a breast milk absorbent pad 30a of a third embodiment; 35. It is the figure which looked at the mother's milk absorption pad 30a from the arrow E of FIG. FIG. 37 is a sectional view seen from the section line FF of FIG. 36; Fig. 4 is a cross-sectional view of a state in which the breast milk absorption pad 30a is attached. Fig. 11 is a front view of a breast milk absorbent pad 30b of a fourth embodiment; FIG. 40 is a cross-sectional view of the breast milk absorbent pad 30b seen from the cross-sectional line GG of FIG. 39; Fig. 4 is a cross-sectional view of a state in which the breast milk absorption pad 30b is attached. It is a sectional view of mother's milk absorption pad 30a. Fig. 10 shows a brassiere 92 without the breast milk absorbing pad 30a. 4 is a front view schematically showing a state in which the breast milk absorbing pad 30a is attached to the brassiere 92. FIG. 4 is a cross-sectional view schematically showing a state in which the breast milk absorbing pad 30a is attached to the brassiere 92. FIG.

1 is a cross-sectional perspective view of part of the sanitary napkin 20a of the first embodiment, FIG. 2 is a front view of the sanitary napkin 20a, and FIG. 1 is a cross-sectional view seen from . The sanitary napkin 20a, which is a sanitary absorbent device, is made of a nonwoven fabric made of natural fibers such as cotton fibers, and is composed of a hydrophilic surface sheet 11 and a liquid-impermeable surface sheet 11, which is laminated on the back side of the surface sheet 11. The back sheet 12 to be placed on top of the back sheet 11 and the back sheet 12 may be made of a water-absorbent cotton-like fiber called fluff pulp containing a synthetic fiber such as polyester, or may be made of only fluff pulp. A sheet-like absorbent body 14 accommodated between and edge portions 17 and 19 on both sides in the width direction perpendicular to the longitudinal direction of the top sheet 11 and the back sheet 12 in a state of being stacked on the surface side of the top sheet 11 and a protective sheet 21 having water repellency bonded to each. Bonding can be accomplished by an adhesive, such as a hot melt adhesive, or by heat sealing or the like.
The topsheet edge 17 of the topsheet 11 extends both in the width direction (the left-right direction in FIGS. 1 and 3) perpendicular to the longitudinal direction of the topsheet 11 and the backsheet 12 (the direction perpendicular to the plane of FIG. 3). 3), extending in said longitudinal direction of the topsheet 11 thereof. The topsheet edge 17 is stacked on the absorbent body 14 . The back sheet edge 19 (FIGS. 1 and 3) of the back sheet 12 is wider than the top sheet edge 17 in both width directions (left and right directions in FIGS. 1 and 3) (both left and right in FIG. 3). It extends outward in the width direction (to the right in FIG. 1 and to the left and right in FIG. 3) from the top sheet edge 17 and extends in the longitudinal direction of the back sheet 12 (paragraph [0031]). The topsheet 11 and backsheet 12 contain the absorbent 14 therebetween except at the backsheet edge 19 . The absorber 14 is accommodated between the topsheet 11 and the backsheet 12 except for the backsheet edge 19 (paragraph [0012]), and the topsheet edge 17 of the topsheet 11 is stacked on the absorber 14. be. The topsheet edge portion 17 of the topsheet 11 is located inside the absorber 14 in the width direction (to the left in FIG. 1).
The protective sheet 21 is provided along the longitudinal direction and includes a joining portion, a folded portion, an outward portion, another folded portion, and an inward portion. The joint portion extends inward in the width direction (to the left in FIG. 1) from the back sheet edge 19 to the top sheet edge 17, and extends to the surface side of the back sheet edge 19 and the surface side of the top sheet edge 17. They are stacked and joined together (paragraph [0012]). The outward portion is folded back at the folded portion at the inner end (the left end in FIG. 1) of the joint portion in the width direction, and from the folded portion, the outward portion in the width direction (FIG. 1) is further outward than the top sheet edge 17 ), and are provided opposite to each other, without being joined, on the surface side of the joining portion on the top sheet edge 17, as clearly shown in FIGS. The protective sheet 21 further comprises an inward portion. The inward portion is folded back at the outer edge in the width direction of the outward portion (the edge to the right of the surface sheet 11 in FIG. 1, the outer edge in the left-right direction in FIG. 3). It extends inward in the width direction (to the left in FIG. 1) between the joint portion and the outward portion, and is provided facing the back surface side (lower surface side in FIG. 1) of the outward portion without being joined. The outward portion and the inward portion overlap (therefore, the sum of the outward portion that is the first stage on the top and the inward portion that is the second stage on the bottom in FIG. 1) becomes two stages, It is rolled and folded at the other folding portion (paragraphs [0056, 0060], Figs. 1 and 3). The protective sheet 21 of the present invention is not provided with the elastic threads 22, 48, 59, 60 and has no longitudinal elastic threads (FIGS. 1, 3, paragraphs [0036, 0060, 0064]).

FIG. 4 is an enlarged view of natural and synthetic fibers. FIG. 5 is a view showing cotton fibers 71 that constitute the non-woven fabric, FIGS. 6 and 7 are enlarged views of the cotton fibers 71, and FIG. FIG. 9 is an enlarged cross-sectional view of the cotton fiber 71, and FIG. 10 is a diagram showing the synthetic fibers forming the nonwoven fabric. 11 and 12 are enlarged views of synthetic fibers, and FIG. 13 is an enlarged sectional view of synthetic fibers. FIG. 14 is a diagram schematically showing a process of joining laminated synthetic fibers. FIG. 15 is a diagram showing a joint where synthetic fibers are joined by an embossing roll 93. FIG.

Natural fibers constituting the surface sheet 11 of the sanitary napkin 20a include cotton fibers 71, or instead of cotton fibers 71, flax fibers 72, silk fibers 73, etc., which are hemp fibers.

The cotton fiber 71 is a fiber that is flat and naturally twisted. When the surface sheet 11 is made of a nonwoven fabric of cotton fibers 71, the synthetic fibers 79 such as polyester are composed of long straight fibers that are connected to one another, so that gaps are less likely to occur between the fibers. Unlike 79, the single fibers are short and have a natural twist, resulting in numerous small gaps 75 between the fibers.

FIG. 16 is a cross-sectional view of cotton fibers 71 that have absorbed liquid. The cotton fiber 71 has a primary cell membrane 81, which is a membrane wall of a ring structure composed of bundles of cellulose molecular chains (microfibrils) of epidermal cells, on the outer peripheral part. has a secondary cell membrane 82 with a microstructure of At the center of the cotton fiber 71, a lumen 76, which is a hollow tube through which nutrients pass during the growth period, is formed. The outer periphery of the lumen 76 has many layers of cellulose layers that constitute the secondary cell membrane 82, and water as bound water is always contained in the fine gaps of the cellulose layers, and is maintained in a gel state. there is The gel-like moisture or moisture of the cotton fibers 71 remains as it is for a relatively long period of time, including at least during manufacturing, storage, distribution, sale, preservation, use, etc., of the sanitary absorbent article, which causes no practical inconvenience. It is retained and does not vaporize, transpire or volatilize. Due to this excellent unique characteristic, the cotton fibers 71 always exhibit a so-called moist feeling, and can give the wearer an excellent pleasant feeling when in direct contact with the wearer's skin. In addition, the cotton fibers 71 prevent skin abnormalities such as rashes, rough skin, eczema, itching, allergic symptoms, atopic dermatitis, etc., on the wearer's skin with which the cotton fibers 71 come into direct contact, prevent discomfort and discomfort, and prevent damage to the skin. can be prevented.

Moreover, even if the cotton fibers 71 rub against or come into frictional contact with the wearer's fragile soft skin, and such rubbing or frictional contact is repeated for a long period of time due to vigorous movements of the wearer, the soft skin will not be damaged. does not occur.

The inventors of the present invention have found that the nonwoven fabric made of cotton fibers 71 having water repellency or the nonwoven fabric obtained by subjecting cotton fibers 71 to water repellent treatment is exactly the same as the nonwoven fabric made of cotton fibers 71 that does not have water repellency, or In much the same way, it was confirmed that said abnormal development of the skin did not occur. This is particularly true for protective sheets in sanitary absorbent articles and cotton fibers 71 for preventing liquid leakage that constitute the water-repellent portion of the surface sheet, for example, in sanitary napkins, light incontinence pads, and panty sheets. The wearer's breasts, lower breasts, pectoral muscles, axillae (e.g., females' abdomen, genitals, armpits, rubbing areas, femoral triangle, front and back thighs, and breast milk absorption pads) It is important for the skin near the armpit.

The water-repellent and non-water-repellent cotton fibers 71 suppress and prevent the wearer from developing atopic dermatitis as described above, and are excellent in this respect. Atopic dermatitis is associated with the menstrual cycle. During the follicular phase, a large amount of estrogen is secreted, and the stratum corneum of the skin retains water and is easy to keep moist, but during the luteal phase the skin becomes itchy and dry. It becomes easier, and skin symptoms are likely to occur and tend to worsen. The genitals and local areas are close to the mucous membranes, and due to irritation such as friction, rubbing, and slipping, and in environments such as dryness, stuffiness, humidity changes, and coldness, bacteria and viruses are likely to propagate and inflammation is likely to worsen. Sanitary absorbent articles containing water-repellent cotton fibers 71 and non-water-repellent cotton fibers 71 in protective sheets and protective parts as components suppress and prevent the onset of such inflammation.

In the protective sheet and the water-repellent portion of the top sheet, the water-repellent cotton fibers 71 are curved in arcs with relatively small radii, so that many soft, ultra-fine fiber pieces of the cotton fibers 71 are formed. protrudes and extends outward. Also with this configuration, the ultra-fine fiber pieces prevent the aforementioned abnormal development of soft skin.

Flax fibers 72 and silk fibers 73, which are hemp fibers, also have the same or similar excellent properties as cotton fibers 71 and can be implemented in conjunction with sanitary absorbent articles.

Since the cotton fibers 71 are hydrophilic, they can quickly absorb water into small pores, gaps, and lumens 76 of tissues such as the primary cell membrane 81 and the secondary cell membrane 82 described above. The cotton fibers 71 also have excellent hygroscopicity due to the function of ultrafine fibers called fibrils and the function of hydroxyl groups that have a high affinity for water. When the cotton fibers 71 absorb liquid, they swell and deform into a circular cross section. The liquid adhering to the cotton fibers 71 is absorbed by the cotton fibers 71 themselves, and enters the gaps 75 between the cotton fibers 71 due to capillary action. be done. By forming the topsheet 11 with the cotton fiber 71, the topsheet 11 is maintained in a moderately moist and wet state, and the liquid that has not been absorbed by the topsheet 11 is allowed to pass through to the absorber 14 side, thereby absorbing the absorber. 14 can be absorbed and retained. A plurality of holes may be formed in the surface sheet 11 to smoothly guide the liquid to the absorbent body 14 .

An experiment by the inventor of the present invention will be described. The synthetic fiber nonwoven fabric A and the cotton fiber nonwoven fabric B were each cut into a length of 150m x width of 85m, placed on a mat of water absorbent pulp of 200g/ ^m2 of length of 150mm x width of 85, and 10ml of physiological saline was added dropwise. After 30 seconds, the weight was measured, and the value obtained by subtracting the initial weights of the synthetic fiber nonwoven fabric A and the cotton fiber nonwoven fabric B was divided by 10 ml of the physiological saline added dropwise to calculate the value (%).

As a result, the synthetic fiber nonwoven fabric A had a moisture permeability of 99.9%, and 0.1% of moisture remained in the nonwoven fabric portion. The cotton fiber nonwoven fabric A had a water permeability of 98.0%, and 2.0% of water remained in the nonwoven fabric portion. The official moisture content of cotton fiber is 8.5%, the official moisture content of polyester is 0.3%, and the official moisture content of polypropylene is 0%. The official moisture content of cotton fibers is higher than the official moisture content of synthetic fibers such as polyester and polypropylene, and does not have the rough feeling of synthetic fibers. As a result, drying of the space between the surface sheet 11 and the wearer's skin is suppressed, excessive release of moisture from the wearer's skin is suppressed, and skin stress of dry and sensitive skin is relieved. be able to. In addition, since the surface of the topsheet 11 does not get excessively wet, when the wearer's skin comes into contact with the topsheet 11, liquids including menstrual blood and urine are prevented from adhering to the wearer's skin. can do. Experiments by the inventors of the present invention have revealed that the official moisture content of cotton fibers is 7-10%, preferably 8-9%, and more preferably 8.5%.

The lumens 76 and the gaps 75 of the cotton fibers 71 can retain air, which has low thermal conductivity, even in a liquid-absorbing state, particularly in a non-liquid-absorbing state. It has good heat resistance, suppresses the release of the heat of the wearer to the outside of the body through the topsheet 11, and can keep the part of the wearer's skin facing the topsheet 11 at an appropriate temperature. In addition, since the cotton fibers 71 increase in tensile strength when absorbing liquid, the cotton fibers 71 are prevented from being easily cut by the movement of the wearer, and the thickness of the topsheet 11 is reduced at the cut position. It is possible to prevent the liquid from becoming thin and returning from the absorbent body 14 to the skin and adhering to it.

Flax fibers 72 are hemp fibers used for clothing. The flax fiber 72 has a lumen in the center and is highly absorbent, so when it touches the skin, it feels dry and not sticky, but the fiber is coarse and hard.

The silk fiber 73 has fibrons located in the center of the fiber and sericin located in the outer periphery of the fiber, and the sericin is dissolved and removed by refining. The silk fibers 73 can be colored, but have no water repellency.

As shown in FIGS. 8 to 11, the polyester fiber 79, which is a synthetic fiber, has no twist, does not form lumens, and has a water-repellent structure with no voids in the fiber. does not have the water absorption and moisture retention properties of the cotton fiber 71. As shown in FIG. 14, the laminated synthetic fibers 89 (the plane is shown in the upper left of FIG. 14) are joined by heat at a hundred and several tens of degrees by an embossing roll 93 having an embossing 101 formed on the surface. It is formed in a sheet shape 88 (the plane is shown in the upper right of FIG. 14). As shown in FIG. 15, the synthetic fibers of the joint portion 95 are whisker-like and uneven, and when the joint portion 95 touches the user's skin, it is easy to feel prickly or dry, causing itching and rashes. , eczema, etc. Skin disorders such as itching, rashes, and eczema are generally called chemical fiber allergies. Chemical fibers themselves are not allergens, and skin disorders are likely to occur when acute or constant chronic contact irritation is applied to the skin.

The absorber 14 is composed of only the cotton fibers 71 having water absorption and fluff pulp having high water absorption, or one of the layers made of cotton-like fibers called fluff pulp containing synthetic fibers such as polyester. It can be formed by stacking, for example, three layers, with water-absorbing polymers sprinkled on the side surfaces. In this way, the water-absorbing polymer can be located between two layers of fluff-like fibers adjacent in the stacking direction. The water-absorbing polymer can also be incorporated into the layer of cotton-like fibers. Absorbent body 14 can also be formed by stacking layers of cotton-like fibers premixed with absorbent polymer. In this way, the water-absorbing polymer can be located inside the layer of cotton-like fibers. The water-absorbing polymer consists, for example, of sodium acrylate or potassium acrylate. The absorbent body 14 is accommodated between the topsheet 11 and the backsheet 12 .

The absorber 14 quickly absorbs the liquid absorbed by the topsheet 11 from the topsheet 11, and the absorbed liquid is solidified into a gel by fluff pulp or water-absorbing polymer and retained.

The back sheet 12 is realized by a sheet made of a thermoplastic synthetic resin such as polyethylene. The protective sheet 21 is realized by water-repellent nonwoven fabric made of cotton fiber. The protective sheets 21 are a pair of gather sheets provided on both edges in the width direction of the topsheet 11 so as to face each other while being stacked on the front side of the topsheet 11 . The protective sheet 21 is fixed to the longitudinal edges of the top sheet 11 and the back sheet 12 with a hot-melt adhesive. Since the heating temperature is as high as 245.degree.

The water-repellent treatment of the cotton fibers may be carried out by spraying the cotton fibers with a water-repellent liquid, or by immersing the cotton fibers in the water-repellent liquid and then taking them out and drying them. Water-repellent agents that are water-repellent liquids include, for example, alkylketene dimer, silicone resin, rosin, wax, cotton oil, and the like.

The backsheet 12 is liquid-impermeable and prevents the liquid absorbed by the absorbent body 14 from leaking to the outside of the sanitary absorbent article. The protective sheet 21 is water-repellent and can prevent menstrual blood from leaking out of the sanitary napkin 20a along both edges in the width direction of the sanitary napkin 20a. Even if the menstrual blood adhering to the protective sheet 21 stays on the protective sheet 21, it is not absorbed by the protective sheet 21, so when the wearer's skin contacts the protective sheet 21, the menstrual blood adheres to the wearer's skin. can be prevented.

The protective sheet 21 may be formed by coating a non-woven fabric made of cotton fibers 71 with a water-repellent agent, which is a water-repellent liquid, by roller coating, or by spraying. When the cotton fiber 71 is used as the protective sheet 21, the cotton fiber 71 has a good touch, so when the protective sheet 21 comes into contact with the crotch of the wearer, the wearer can be prevented from feeling uncomfortable. Also, the charge amount generated on the human skin when the cotton fiber 71 is rubbed against the human skin shown in FIG. Also, the wearer is restrained from feeling discomfort due to discharge of static electricity. Further, the cotton fiber has a lumen 76, which is a hollow tube, formed inside, and has a natural twist, so that a large number of gaps are formed between the fibers, so that the cotton fiber has a high cushioning property. As a result, bedsores and the like can be prevented, and the user's skin can be kept clean.

FIG. 17 is a front view of a sanitary napkin 20b of another embodiment. FIG. 18 is a sectional view seen from the section line BB in FIG. FIG. 19 is a front view of a state in which the sanitary napkin 20b is attached. FIG. 20 is an enlarged view of the sanitary napkin 20b attached. As shown in FIG. 17, the sanitary napkin 20b is provided with a pair of adhesive tapes 25 protruding perpendicularly to the longitudinal direction from the central portion of the rectangular main body in the front view shown in FIG. The rest of the structure is the same as or similar to the sanitary napkin 20a, so corresponding parts are given the same reference numerals. The sanitary napkin 20b is arranged on the inner surface 27 of the shorts 26 and the wing portions 24 are folded back toward the outer surface 28 of the shorts 26 . The folded back wing portion 24 is attached to the outer surface 28 with an adhesive tape 25 . Since the sanitary napkin 20b is worn so that the wing portion 24 sandwiches the crotch portion of the shorts 26, the sanitary napkin 20b arranged on the inner surface 27 of the shorts 26 shifts or twists, causing side leakage of menstrual blood. In addition, the nonwoven fabric made of the cotton fiber 71 can reduce adverse effects on the skin as much as possible. The wing portion 24 can also be adhered to the outer surface of the shorts 26 by heating a hot-melt adhesive.

FIG. 21 is a front view of a sanitary napkin 20c of another embodiment. 22 is a cross-sectional view seen from the cross-sectional line CC of FIG. 21. FIG. As shown in FIG. 22, the sanitary napkin 20c has a protective sheet 21 provided with elastic threads 22, and the rest of the structure is the same as or similar to that of the sanitary napkin 20a. . Since the protective sheet 21 is provided with the elastic thread 22, the protective sheet 21 rises when worn and adheres along the skin to effectively prevent lateral leakage of bodily fluids such as menstrual blood and urine. The elastic thread 22 may be omitted in order to eliminate the feeling of oppression in wearing and to obtain a degree of freedom.

FIG. 23 is a front view of a sanitary napkin 20d of another embodiment. FIG. 24 is a cross-sectional view of the sanitary napkin 20d seen from the cross-sectional line DD in FIG. As shown in FIG. 24, the sanitary napkin 20d is similar or similar to the sanitary napkin 20a, except that the protective sheet 41 is not a gathering sheet, so corresponding parts are given the same reference numerals. The sanitary napkin 20d has protective sheets 41 on both edges of the topsheet 11 in the width direction perpendicular to the longitudinal direction. The protective sheet 41 is bonded to the back sheet 12 and both side edges of the top sheet 11 in the width direction.

According to the present embodiment, people with dry skin, allergic predisposition, atopic predisposition, or people who have just given birth (hereinafter sometimes referred to as "unhealthy people") are all users of sanitary napkins. Although it is a few percent to 10%, it is possible to eliminate the burden on the skin that these users feel when using a sanitary napkin using a synthetic fiber as the topsheet 11 .

That is, the cotton fiber 71 has excellent water retention properties, and when a non-healthy person wears the sanitary napkins 20a to 20d using the cotton fiber 71 as the surface sheet 11, the degree of dryness of the skin is reduced. By appropriately moisturizing the skin, dryness of the skin can be relieved, and rough skin caused by the dryness of the skin can be reduced. Incidentally, when a healthy person wears the sanitary napkins 20a to 20d using the cotton fiber 71 as the topsheet 11, the wearer can be given an appropriate moisturizing feeling. The surface sheet 11 made of cotton fibers 71 contains a large amount of gel-like bound water and has a moist texture compared to synthetic fibers. Bound water is water contained in living organisms and cannot be easily removed by filtering or air-drying. This reduces irritation to the skin.

The sanitary napkins 20a-20d are of a disposable type, and the user can use the sanitary napkin 2 hygienically.

According to an experiment conducted by the present inventor, when a wearer wears the sanitary napkins 20a to 20d for 2 to 3 days, the wearer does not feel discomfort due to wetting and may feel itching. I didn't get a rash, or even a rash. In addition, the odor of menstrual blood discharged from the wearer and absorbed by the sanitary napkins 20a to 20d is reduced. Since the topsheet 11 made of the non-woven fabric of the cotton fibers 71 does not easily stick to the wearer's skin, the wearer is less likely to feel uncomfortable due to the topsheet 11 sticking to the skin.

When the wearer wears the sanitary napkins 20a to 20d for activities, the length L of the sanitary napkin 20 in the longitudinal direction is, for example, 235 mm to 290 mm, and the length W in the width direction is, for example, 165 mm. be. When the sanitary napkins 20a to 20d are worn while sleeping, the length L of the sanitary napkins 20a to 20d in the longitudinal direction is preferably 290 mm to 400 mm, and the length W in the width direction is preferably 290 mm to 400 mm. 100 to 180 mm including the wing portion 24 is preferable. The size of the sanitary napkins 20a to 20d is not limited to this. For example, the length L in the longitudinal direction when worn while sleeping can be 400 mm or more.

FIG. 25 is a diagram showing triboelectrification series of fibers, and FIG. 26 is a graph showing electrical resistance values versus relative humidity of fibers. In FIG. 25, when two arbitrary objects described in the triboelectrification series are rubbed, the charge amount per unit area (coulomb/cm ² ) generated on the objects increases as the distance between the two objects increases. Among the two objects, the object positioned on the positive electrode side generates positive static electricity, and the object positioned on the negative electrode side generates negative static electricity.

Cotton is closer to "human skin" than acrylic and polyester, and the amount of charge per unit area (coulomb C/cm ² ) generated on human skin when cotton is rubbed against human skin is less than when rubbing acrylic and polyester.

As shown in FIG. 26, for polyester and nylon, the logarithm logRs of the electrical resistance exceeds 14 when the relative humidity (% RH) decreases. When the logarithm logRs of the resistance value is greater than 14, an unpleasant electrostatic discharge that can be felt by humans occurs between the skin and the fabric. The logarithm logRs of the resistance value of cotton is smaller than that of polyester, nylon, and rayon over the entire range of relative humidity (% RH) (0% to 100%). The logarithm logRs of the resistance value of cotton is less than 12 even when the relative humidity (% RH) is low and dry, and the wearer does not feel discomfort due to the discharge of static electricity.

In this embodiment, since cotton fiber is used as the material of the topsheet 11, when the topsheet 11 rubs against the human skin, the amount of charge generated per unit area of the human skin is small. No appreciable and unpleasant static discharges occur.

FIG. 27 is a front view schematically showing the sanitary napkin 20a before being worn by the wearer with reference numeral 50a, and FIG. 28 is the sanitary napkin 20a after being worn by the wearer with reference numeral 50b. 2 is a front view schematically shown in FIG. FIG. 29 is a front view schematically showing a sanitary napkin 20a worn by a wearer, and FIG. 30 schematically showing a sanitary napkin 20a worn by a wearer as viewed from below. 31 is a side view schematically showing a state in which the sanitary napkin 20a is worn by the wearer.

By providing the protective sheet 21, it is possible to prevent menstrual blood from leaking out of the sanitary napkin 20a along both edges in the width direction of the sanitary napkin 20a. This protective sheet 21 is positioned in the femoral triangle 98, which is the crotch portion inside the roots of both legs 97, when the user is wearing the sanitary napkin 20a, and is positioned on the femoral triangle 98 when the wearer is walking. Due to the movement of 96, the protective sheet 21 is repeatedly rubbed against the user's skin in the front-rear direction and the left-right direction, for example, the protective sheet 21 is greatly deformed and the protective sheet 21 is wrinkled. Furthermore, the wearing position of the sanitary napkin 20a may shift due to the user's walking motion.

When the protective sheet 21 is made of synthetic fibers, it is water-repellent and can prevent menstrual blood from leaking out of the sanitary napkin 20a. About several percent to 10% of all users have dry skin, allergic constitution, atopic constitution, etc., and the protective sheet 21 rubs against the skin, which easily causes itching, rash, eczema, and the like. Conventionally, these users cannot use sanitary napkins in which the protective sheet 21 is made of synthetic fibers, and have no choice but to use cloth napkins. Cloth napkins can be used repeatedly by washing, but they are inferior in water absorption and waterproofing, are troublesome, unsanitary, and expensive. In some cases, the user folds the cotton cloth according to his or her body shape.

In the sanitary napkin 50b (FIG. 28) of the present embodiment, the protective sheets 21 and 41 located on both sides in the width direction perpendicular to the longitudinal direction are made of cotton fiber 71, and have appropriate breathability, moisture retention, and Since it is bulky and soft, it is difficult for the wearer to feel discomfort due to wetness or static discharge, so that the wearer can be prevented from feeling discomfort such as rash or itching.

By spraying, adhering, or applying a water-repellent agent such as alkylketene dimer, silicon, rosin, wax, cotton oil, etc., to the cotton fiber nonwoven fabric base material, the surface sheet, protective sheets 21, 41, which will be described later, are formed. The protective sheets 45, 47 can be made water-repellent.

FIG. 32 is a cross-sectional view showing the state of cotton fibers 71 of the topsheet 11 according to the second embodiment. FIG. 33 is a cross-sectional view showing a state in which the cotton fibers 71 of the topsheet 11 are compressed. 1 to 31 will be omitted, and the same reference numerals will be used. In this embodiment, as the type of cotton fiber 71 of the topsheet 11, one having thick and highly elastic fibers such as gossypium or arborium is used.

Even if the wearer of the sanitary napkin 20 sits on a chair, for example, and the wearer's skin compresses the cotton fibers 71 of the topsheet 11 in the shape of an arrow as shown in FIG. When the wearer stands up from the chair and the compression of the cotton fibers 71 is released, the cotton fibers 71 are elastically deformable and can return to the pre-compressed bulk density state shown in FIG. By setting the cotton fibers 71 to an appropriate density in consideration of hydrophilicity, breathability, heat retention, etc., after the compression of the cotton fibers 71 is released, the same density as before compression can be restored. It can retain its properties, breathability and heat retention.

When the compressive force on the cotton fibers 71 is released, the plurality of cotton fibers 71 almost return to the orientation state before compression. can be suppressed.

The surface sheet 11 is not limited to having one layer, and may have a plurality of layers, eg, two layers 11a and 11b as shown in FIG. 34, for example. A layer 11a in which cotton fibers 71 are arranged so as not to impair the feel of the wearer's skin is formed on the surface side that contacts the wearer's skin. It is also possible to form the layer 11b of the cotton fibers 71 with a bulk density that takes into consideration the above.

FIG. 35 is a front view of the breast milk absorbent pad 30a of the third embodiment. FIG. 36 is a side view of the breast milk absorbent pad 30a as seen from arrow E in FIG. FIG. 37 is a cross-sectional view taken along section line FF of FIG. 236. FIG. The bottom of FIG. 35 and the left of FIG. 37 are the bottom when the breast milk absorbent pad 30a is worn. FIG. 38 is a cross-sectional view of a state in which the breast milk absorption pad 30a is attached. The breast milk absorption pad 30a is made by shortening the longitudinal length L of the sanitary napkin 20a shown in FIG. are formed in napkin sizes ranging from 90 mm to 140 mm. The breast milk absorbing pad 30a is worn by women before and after childbirth to absorb leaking breast milk. The breast milk absorbing pad 30a is made of a non-woven fabric made of natural fibers such as cotton fibers 71, and includes a hydrophilic surface sheet 46 and water-repellent protective sheets 45 and 47 that extend along the sides of or around the surface sheet 46. , a back sheet 42 having liquid impermeability, which is bonded to the side or periphery of the top sheet 46 in a state of being stacked on the back side of the top sheet 46; It is made of fibers and includes an absorbent body 44 contained between a topsheet 46 and a backsheet 42 . Of the protective sheets 45 and 47, the protective sheet 47 positioned below the nipple 32 and in contact with the lower part of the breast part 31 having the nipple 32 when worn by the user may be in the form of a single sheet. However, it may be rolled up and folded in a plurality of stages, for example, in two stages as shown in FIG. The upper protective sheet 45 is in the form of a sheet joined to the surface sheet 46 . In another embodiment of the present invention, if the thickness due to folding or gathers burdens the skin, the same structure as the protective sheet 45 may be used. In still another embodiment, the protective sheet 47 has no gathers. It can be structure.

The breast milk absorption pad 30a is worn so that the surface sheet 46 facing the body side of the wearer covers the breast 31 so as to contact the nipple 32, and the protective sheet 47 positioned below the nipple 32 surrounds the breast portion 31. be done.

When the topsheet 46 is made of the nonwoven fabric of the cotton fibers 71, the topsheet 46 is absorbed by the breast milk leaked from the nipple 32 and absorbed by the topsheet 46 while keeping the topsheet 46 in a moderately moist state. The absorbed mother's milk can be held by the absorber 44 . This can reduce the effects on the user's skin, such as dry skin, allergic predisposition, and atopic predisposition. Since the breast milk absorbing pad 30 has the protective sheet 47, breast milk can be prevented from running around the breast milk absorbing pad 30a and leaking to the outside of the breast milk absorbing pad 30a.

Since the absorber 44 is made of fluff pulp, which is a highly water-absorbing cotton-like fiber, the fluff pulp quickly absorbs the breast milk absorbed by the surface sheet 46, and solidifies and retains the absorbed breast milk in a gel form. can do. The back sheet 42 can prevent the mother's milk absorbed by the absorber 44 from leaking out of the mother's milk absorbent pad 30a. If you are concerned about gel-like coagulation, fluff pulp alone will suffice, and since there is a protective sheet 47 there is no problem with absorbency, so you can use it with confidence.

FIG. 39 is a front view of the breast milk absorbent pad 30b of the fourth embodiment. FIG. 40 is a cross-sectional view of the breast milk absorbent pad 30b as seen from the cross-sectional line GG in FIG. FIG. 41 is a cross-sectional view of a state in which the breast milk absorption pad 30b is attached. The breast milk absorbent pad 30 b includes and covers protective sheets 55 , 57 positioned above and below the nipple 32 . The protective sheets 55 and 57 are similar to the protective sheet 47 described above, and are gather sheets formed to be stretchable by being folded in a plurality of stages and provided with elastic threads 59 and 60 . According to such a configuration, it is possible to reduce the force that the breast part 31 receives when force is applied to the breast milk absorbing pad 30b from the outside. However, if the elastic force of the elastic threads 59, 60 of the gathers of the protective sheets 55, 57 is a burden on the skin, the protective sheets 55, 57 can be used without any problem.

When the sanitary absorbent device is the sanitary napkin 20a, 20b, 20c, 20d, it is worn between the crotch of the user when in use. In this state, the sanitary napkins 20a, 20b, 20c, and 20d are pressed against the body by the underpants or other underwear worn by the user, and are sandwiched by the roots of the left and right thighs. It is pressed against bare skin with irregularly shaped wrinkles.

42 is a cross-sectional view of the breast milk absorbing pad 30a, and FIG. 43 is a front view showing the inside of the pair of left and right connected bowl-shaped portions 100 of the brassiere 92 in which the breast milk absorbing pad 30a is not worn. 44 is a front view showing the inner side of the brassiere 92 with the breast milk absorbing pad 30a attached to the inside of the pair of connected left and right bowl-shaped portions 100 of the brassiere 92, and FIG. It is a cross-sectional view of a state in which it is attached to and used. When the sanitary absorbent device is the breast milk absorbing pad 30a, the breast milk absorbing pad 30a is used with the backsheet 42 held by the brassiere with an adhesive, and in the state of use, the breast milk absorbing pad 30a is attached to the wearer. A brassiere 92 or the like is pressed against the chest of the wearer and pressed against the skin in a wrinkled state.

When the topsheet 11 and protective sheet 21 of the sanitary napkins 20a, 20b, 20c, and 20d or the topsheet 46 and protective sheet 45 of the breast milk absorbent pads 30a and 30b are made of synthetic fibers, such wrinkles cause bending. At the folded portion, the pin-shaped fiber portion protruding from the fiber bundle of the synthetic fiber comes into contact with the skin in a piercing direction, giving stronger stimulation to the skin than the surrounding fibers, but the surface sheets 11, 46 Since the protective sheets 21 and 45 are both made of cotton fiber 71, they are less likely to cause atopic dermatitis, rashes, etc., and even users with sensitive skin can be prevented from inducing skin troubles. .

The breast milk absorption pads 30a and 30b hang down due to the weight of the breast part 31 in the natural state. Therefore, a maternity brassiere 92 having a structure that facilitates breast-feeding is worn even after giving birth in order to maintain one's appearance in social life. This brassiere 92 is always used so as to lift the breast part 31 against its weight and perform a lift-up function. Therefore, regardless of the presence or absence of the elastic threads 48 and 60, the lower part of the breast part 31 is kept under upward pressure due to the lifting action of the brassiere 92. As shown in FIG. Therefore, the lower part of the breast part 31 remains pressed by the protective sheets 47, 57 from the lower part of the breast milk absorbing pads 30a, 30b. As a result, the conventional breast milk absorbing pad made of synthetic fibers rubs against the lower part of the breast part 31, and the slippage may cause skin inflammation. During the lactation period, since lactation is required day and night, the postpartum physical condition is weakened, stress is added, and the skin is likely to become rough. Conventional breast milk absorption pads made of synthetic fibers are difficult to use because they cause severe skin irritation and rough skin after childbirth. The breast milk absorbent pads 30a and 30b made of cotton fibers of the present invention solve the problems of such conventional breast milk absorbent pads made of synthetic fibers. In particular, under the breast milk absorbing pads 30a and 30b, there is a surface sheet 46 made of cotton fibers 71 having properties that are optimal for the skin, and a protective sheet 57 made of water-repellent cotton fibers that prevents leakage of breast milk. Contact with the skin under the breast part 31, therefore, reliably prevents the skin from being inflamed and roughened.

The elastic threads 22, 48, 59, 60 are elongated cords elastically stretchable in their longitudinal direction, and are arranged in elongated spaces surrounded by the protective sheets 21, 47, 55, 57. Both ends of 22, 48, 59, 60 are connected and fixed to protective sheets 21, 47, 55, 57 at both ends in the longitudinal direction of the space, and the protective sheets 21, 47, 55, 57 are elastically fixed. By pulling force, it will be in a standing posture in a natural state.

In another embodiment of the present invention, in FIGS. 35 to 45 showing the breast milk absorbing pads 30a and 30b, the protective sheets 45 and 55 or the water-repellent portion, which are positioned upward when worn, are not likely to leak breast milk. May be omitted.

In another embodiment of the present invention, instead of providing a protective sheet, a part of the surface sheet having a hydrophilic portion having hydrophilicity is made of a nonwoven fabric made of cotton fiber corresponding to the protective sheet, and is repellent. A water-repellent portion having water repellency by water treatment may be arranged.

11, 46 top sheet 11 a, 11 b layer 12, 42 back sheet 14, 44 absorbent body 17, 19 edge 20 a, 20 b, 20 c, 20 d, 50 a, 50 b sanitary napkin 21, 41, 45, 47, 55, 57 protection Sheet 22, 48, 59, 60 Elastic thread 24 Wing part 25 Adhesive tape 26 Shorts 27 Inner surface 28 Outer surface 30a, 30b Breast milk absorption pad 31 Breast part 32 Nipple 51 Both sides 71 Cotton fiber 72 Flax fiber 73 Silk fiber 75 Gap 76 Lumen 79 polyester fiber 81 primary cell membrane 82 secondary cell membrane

Claims (4)

a surface sheet made of nonwoven fabric made of cotton fibers and having hydrophilicity;
b a back sheet having liquid impermeability and stacked on the back side of the top sheet;
c. Including an absorbent body made of cotton-like fibers having water absorption,
d the face sheet has a face sheet edge;
the topsheet edge extends in the longitudinal direction of the topsheet, both in the width direction perpendicular to the longitudinal direction of the topsheet and the backsheet;
e. the backsheet has a backsheet edge;
the backsheet edges extend outward in the width direction than the topsheet edges in both of the width directions and extend in the longitudinal direction of the backsheet;
f The top sheet and the back sheet are
f1 the topsheet edge of the topsheet is stacked on the absorbent, with the absorbent between the topsheet and the backsheet except at the backsheet edge;
f2 the edge of the top sheet of the top sheet is inside the absorbent body in the width direction;
g. A protective sheet made of cotton fiber and made of water-repellent nonwoven fabric is provided along the longitudinal direction, and the protective sheet is:
g1 a junction,
a joining portion extending inward in the width direction from the edge of the back sheet to the edge of the top sheet and stacked and joined to the front side of the edge of the back sheet and the edge of the top sheet;
g2 is an outward portion,
It is folded back at the folded portion at the inner end in the width direction of the joined portion, extends outward in the width direction from the folded portion beyond the edge of the top sheet, and reaches the surface side of the joined portion on the edge of the top sheet. an outward portion provided facing each other without being joined;
g3 extending inward in the width direction between the joint portion and the outward portion from another folded portion folded back at the outer end in the width direction of the outward portion, and joined to the back side of the outward portion; and an inward facing portion provided facing each other without
The outward portion and the inward portion overlap to form two stages, and are rounded and folded at the other folding portion,
g4 A sanitary absorbent article characterized in that the protective sheet does not have said longitudinal elastic threads . 2. The sanitary absorbent article according to claim 1, wherein the non-woven fabric of the protective sheet has water repellency by using alkyl ketene dimer, which is a water repellent agent. Cotton fibers have a primary cell membrane on the outer periphery, which is a ring-shaped membrane wall composed of bundles of cellulose molecular chains (microfibrils) of epidermal cells. It has a secondary cell membrane with a structure, and in the center of the cotton fiber, a lumen, which is a hollow tube that passes nutrients during the growth period, is formed. 3. The sanitary absorbent article according to claim 1 or 2, characterized in that there are overlapping cellulose layers, water as bound water is always contained in minute gaps of the cellulose layers, and the absorbent article is held in a gel state. . The sanitary absorbent article according to any one of claims 1 to 3, characterized in that it is one selected from the group consisting of sanitary napkins, light incontinence pads, panty sheets and breast milk absorbent pads.