JP2007054136A - Napkin with absorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sanitary item which reduces mental resistance when wearing it, does not stain fingers or clothes with menstrual blood or does not fall onto a floor or a toilet bowl when it is detached after use, does not easily cause menstrual blood leakage, and is thin and inconspicuous with clothes on. <P>SOLUTION: On the upper surface of a napkin body 200, a vaginal opening absorber 300 is moored and arranged. The vaginal opening absorber 300 immediately absorbs the menstrual blood coming out of the vaginal opening. Further, the vaginal opening absorber 300 delivers the absorbed menstrual blood to the napkin body 200, and the napkin body 200 absorbs the menstrual blood relayed by the vaginal opening absorber 300. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a napkin with an absorbent body.

  Conventionally, sanitary products generally used include sanitary tampons and sanitary napkins.

  Although sanitary tampon can completely prevent menstrual leakage, it is an internal type that is directly attached to the vagina, which causes problems such as foreign body feeling and discomfort during wearing, and difficulty in wearing in the vagina. There is.

  On the other hand, the sanitary napkin can be used without imposing a burden on the body, but since the adhesiveness of the sanitary napkin to the vicinity of the vaginal opening is poor, it is not possible to completely prevent menstrual leakage. Therefore, in order to prevent menstrual blood leakage, great efforts have been made such as enhancing the absorbency by using an absorbent polymer and devising the shape. For example, as an example of a sanitary napkin for night use, a large-sized sanitary napkin having high absorbability can be cited.

  However, even if it is a sanitary napkin with high absorbency, menstrual leakage will occur if any gap is formed. This is because when a gap is created between the sanitary napkin and the vaginal opening at bedtime, the gap between the sanitary napkin and the body is parallel to the direction in which gravity is applied. This is because blood flows toward the anus without contacting the sanitary napkin. Therefore, the night-only sanitary napkin attempts to prevent menstrual leakage by greatly extending the menstrual absorption region backward and receiving menstrual blood flowing backward in the region. However, even this configuration does not completely prevent bedtime leakage. That is, when a large amount of menstrual blood is involved, menstrual blood that has reached the vicinity of the coccyx may concentrate in the rear region of the sanitary napkin with low absorbability and leak beyond the absorption capacity.

  Further, in order to increase the absorbability of the sanitary napkin as described above, a large amount of absorbent material such as pulverized pulp or absorbent resin must be used in the absorbent layer. For this reason, there exists a fault that the whole sanitary napkin will become large and will become conspicuous even from the top of clothes.

  Furthermore, in the case of the lateral position, menstrual blood that has come out from the vaginal opening flows toward the thigh, so that the side part of the sanitary napkin is also devised as a leak prevention measure. However, these devices are intended to prevent menstrual blood from flowing out of the sanitary napkin through the body and to prevent contamination of underwear by menstrual blood. Therefore, although it is effective as a measure for preventing blood flow to the outside of the sanitary napkin, the menstrual blood that has flowed adheres to the vulva part over a wide area, resulting in discomfort.

  Thus, as an improvement measure for preventing menstrual leakage of the sanitary napkin, a measure that does not create a gap between the sanitary napkin and the body is necessary. For example, there is a method in which the central portion of the sanitary napkin is raised and is closely attached to the periphery of the vaginal opening. However, since the sanitary napkin is fixed to the garment with an adhesive tape, the sanitary napkin is linked to the movement of the garment but not linked to the movement of the body. For this reason, it cannot always be said that the vaginal opening and the sanitary napkin are in contact, and the risk of menstrual leakage always remains.

  Therefore, in order to solve the above problem, a leak-proof absorber shown in Patent Document 1 has been proposed. In the method of Patent Document 1, a leak-proof absorbent body that is completely separated from a sanitary napkin is placed on the sanitary napkin, so that the leak-proof absorbent body can be used even if a gap occurs between the vaginal opening and the sanitary napkin. Always close the mouth of the vagina to make menstrual leakage difficult.

Also, an interlabial pad as shown in Patent Document 2 has been proposed. The interlabial pad is inserted between the labia of a woman, and the interlabial pad alone absorbs menstrual blood. Since it has higher adhesion to the body than a sanitary napkin, menstrual leakage is less likely to occur, and the psychological resistance when worn is lower than that of a sanitary tampon inserted into the vagina.
JP 2002-017777 A JP 2004-097693 A

  However, when the interlabial pad is removed after use, the interlabial pad that has absorbed menstrual blood must be removed directly from between the labia with a finger. For this reason, menstrual blood is easily attached to the finger, which is problematic in terms of hygiene.

  In addition, the leakage-preventing absorber and the interlabial pad may fall off the labia when used or removed after use and may contaminate clothing. This is because the interlabial pad falls in the direction of gravity due to the weight of blood absorbed by the interlabial pad. There is a high possibility that it will occur also when the pinch is shallow when worn or when the posture when removing is bad. In addition, there is a possibility that the interlabial pad falls to the toilet bowl, which adversely affects the toilet bowl.

  Furthermore, when the interlabial pad is used alone, the amount of menstrual blood exceeds the absorption capacity of the interlabial pad because the interlabial pad is small, and menstrual blood may leak from the interlabial pad. Conceivable. Such pad misalignment and leakage due to excessive absorption allowance may cause anxiety for the user.

  The present invention has been made in view of such a point, the psychological resistance at the time of wearing is low, when removing after use, fingers and clothes are not stained with menstrual blood, fall on the floor or toilet, The purpose is to provide a sanitary product that can be used with peace of mind and is less likely to cause menstrual leakage.

  The napkin with an absorbent body of the present invention includes a napkin body having an absorption layer that absorbs menstrual blood, and an absorbent body that is tethered to the upper surface of the napkin body, and the absorbent body absorbs menstrual blood. Then, a configuration is adopted that includes an absorbent body that passes the absorbed menstrual blood to a napkin body, and an absorbent body storage bag that stores the absorbent body.

  According to the present invention, psychological resistance at the time of wearing is low, and fingers and clothing do not get dirty with menstrual blood when dropped after use, or do not fall on the floor or toilet, and can be used with confidence, and menstrual leakage It can be made difficult to occur.

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

  In order to eliminate the discomfort and discomfort at the time of wearing like a sanitary tampon and to eliminate the gap between the vaginal opening and the body as seen on the sanitary napkin, the present inventor And found that it is necessary to install a vaginal opening absorber. In addition, the vaginal opening absorber and sanitary can be used to prevent fingers and clothing from becoming contaminated with menstrual blood when they are removed and falling to the floor or toilet bowl, which may occur in the interlabial pad. It was found that the napkin main body should be connected.

  Further, in the present invention, the vaginal opening absorber connected to the sanitary napkin main body not only has a leakage preventing function for immediately absorbing menstrual blood that has come out of the vaginal opening, but also the menstrual blood absorbed by the vaginal opening absorber. It also has the function of passing menstrual blood to the sanitary napkin body that is in contact with the opposite side of the vaginal opening (clothing side). By doing this, even if menstrual blood is large and cannot be absorbed by the vaginal opening absorber alone, the amount that can not be absorbed can be absorbed by the sanitary napkin body, and as a result menstrual blood will not leak is there. Furthermore, since the vaginal opening absorber reliably relays menstrual blood to the central portion of the napkin body, it is not necessary to enlarge the absorption layer of the napkin body in the front-rear direction. As a result, the portion other than the central portion of the napkin main body can be made thin, and even when viewed from the top of the clothes, it becomes inconspicuous.

  1 is a perspective view showing a configuration of a napkin with a vaginal opening absorber according to an embodiment of the present invention, FIG. 2 is a plan view of the napkin with a vaginal opening absorber of FIG. 1, and FIG. 3 is a vaginal opening of FIG. It is a side view of a napkin with an absorber. In FIG. 1, the right back is the front of the napkin with the vaginal opening absorber, and in FIGS. 2 and 3, the right side is the front of the napkin with the vaginal opening absorber.

  In the napkin 100 with the vaginal opening absorber shown in FIGS. 1 to 3, the vaginal opening absorber 300 is disposed near the center of the skin-side surface 210 of the napkin body 200.

  The vaginal opening absorber 300 is disposed at a position where it can be in close contact with the user's vaginal opening when the napkin 100 with the vaginal opening absorber is used, and absorbs menstrual blood coming out of the vaginal opening to the front, rear, left and right. Prevent leaks. Furthermore, the vaginal opening absorber 300 passes the once absorbed menstrual blood to the absorption region 230 of the napkin body 200 through the contact surface with the skin side surface 210 of the napkin body 200.

  As shown in FIG. 4, the vaginal opening absorber 300 has a configuration in which the vaginal opening absorber body 310 is stored in a vaginal opening absorber storage bag 320, and a part of the vaginal opening absorber storage bag 320 is a napkin. It is bonded to the skin side surface 210 of the main body 200.

  In FIG. 1 to FIG. 3, the bonding location 330 is illustrated as one location in front of the vaginal opening absorber 300, but the number and position of the bonding locations 330 are not limited thereto. The number and position of the adhesion points 330 may be such that the vaginal opening absorber 300 can move back and forth and right and left on the napkin body 200 in order to absorb the shift in use between the user's body and the napkin body 200. Here, “the contact point 330 is one point in the front” refers to the number of contact areas between the vaginal opening absorber 300 and the napkin body 200, and is crimped or bonded at a plurality of positions in this area. May be. For example, in FIG. 2, the bonding location 330 is one front portion, but in this one bonding location 330, the vaginal opening absorber 300 and the napkin body 200 may be uniformly crimped at one location, It may be crimped in six places. The same applies to the subsequent description of the bonding portion 330.

  The position where the vaginal opening absorber 300 is disposed is not particularly limited as long as it is on the absorption region 230 of the napkin body 200, but is preferably near the center of the absorption region 230 having high absorbability. The shape and size of the vaginal opening absorber 300 is not particularly limited as long as it conforms to the depression of the vulva centered around the vaginal opening and contacts the bleeding site of the vaginal opening.

  In addition, as above-mentioned, the vaginal opening absorber 300 also plays the role which absorbs the shift | offset | difference in use between a user's body and the napkin main body 200. FIG. For example, as shown in FIG. 4, the size of the vaginal opening absorbent body storage bag 320 has a margin with respect to the vaginal opening absorbent body 310, so that the gap between the vaginal opening absorbent body 310 and the adhesion portion 330 is increased. The slack can be achieved and the above-mentioned purpose can be achieved. In this case, it is possible to sag by increasing the length of the portion between the vaginal opening absorber body 310 and the adhesion portion 330, and it is possible to widen the range of movement of the vaginal opening absorber 300 in the front-rear and left-right directions. At this time, it is necessary to pay attention so that the size of the vaginal opening absorbent body storage bag 320 does not give a margin to the side and the rear side of the vaginal opening absorbent body 310. In such a case, the vaginal opening absorber body 310 may lack a sense of stability during use, or the user may feel uncomfortable or sticky.

  The method of fixing the vaginal opening absorber body 310 is not limited to the method using the vaginal opening absorber storage bag 320 as shown in FIGS. For example, it is conceivable that the vaginal opening absorber 300 and the napkin body 200 are fastened with a string. In addition, when the number of the adhesion places 330 is one in this way, considering that the vaginal opening absorber 300 is easily displaced backward during use, the position of the adhesion portion 330 is located in front of the vaginal opening absorber 300. preferable. By doing in this way, the vaginal opening absorber 300 can be moved back and forth and right and left, but the backward movement width can be within a certain range.

  Further, as shown in FIGS. 5 and 6, the vaginal opening absorber 300 may be fixed by bellows-like support portions 340 on the left and right sides. Also in this case, it is possible to absorb the shift in use in the front / rear / left / right direction and the twist of the vaginal opening absorber 300, and to suppress the shift of the vaginal opening absorber 300 in the rearward direction within a certain range. Furthermore, the ease of displacement of the vaginal opening absorber 300 can be adjusted for each direction by narrowing the front side and widening the rear side, instead of making the two left and right bonding locations 330 parallel. Moreover, as shown in FIG. 7, the vaginal opening absorber 300 can also be made detachable by providing the attachment parts 350 and 360 in the vaginal opening absorber 300 and the napkin main body 200, respectively.

  As shown in the cross-sectional view of FIG. 8, the napkin body 200 includes a top sheet 240, a diffusion layer 250, an absorption layer 260, and a back sheet 270. In FIG. 8, the upper side shows the skin side surface 210, and the lower side shows the clothing side surface 220. In FIGS. 1 to 2 and FIGS. 5 to 7, the napkin body 200 is illustrated as a winged type, but the shape of the napkin body 200 is not limited thereto. For example, a normal type (without wings) or a large rear absorption area for night use may be used.

  The topsheet 240 immediately passes menstrual blood passed from the vaginal opening absorber 300 to the diffusion layer 250. Further, it is difficult to see dirt on the diffusion layer 250 and the absorption layer 260 after use.

  The diffusion layer 250 quickly receives menstrual blood from the top sheet 240 and passes it to the absorption layer 260. At this time, the menstrual blood is diffused in the plane direction so that the menstrual blood is concentrated on one point of the absorption layer 260 so as not to exceed the limit amount.

  The absorption layer 260 absorbs menstrual blood.

  The back sheet 270 is an impermeable sheet that faces the clothing when worn, and prevents menstrual blood from contaminating the clothing.

  Next, each material forming the napkin with the vaginal opening absorber will be described.

  The vaginal opening absorber body 310 is not particularly limited as long as it can rapidly absorb menstrual blood. For example, natural fibers such as linear pulp (pulp fibers loosened linearly) and crepe paper (including tissue paper), chemical fibers such as rayon staple cotton, organic polymer materials such as polymer absorbents, and A combination of these may be used.

  The vaginal opening absorber storage bag 320 is permeable to menstrual blood, and the material is not particularly limited as long as it is strong enough not to break during use. Examples thereof include organic polymer materials such as synthetic fiber nonwoven fabrics and perforated plastic sheets, natural fibers and chemical fibers such as cotton and rayon nonwoven fabrics, and combinations thereof.

  The top sheet 240 is permeable to menstrual blood, like the vaginal opening absorber storage bag 320, and the material is not particularly limited as long as it is strong enough not to be damaged during use. As an example, the same material as the vaginal opening absorber storage bag 320 is mentioned.

  The material of the diffusion layer 250 is not particularly limited as long as menstrual blood can be quickly received from the surface sheet and passed to the absorption layer. For example, a tissue, a high loft nonwoven fabric, a pulp laminate, etc. are mentioned.

  The material of the back sheet 270 is not particularly limited as long as it is impermeable. For example, a composite material such as a polyethylene sheet, a polymer elastic sheet, an organic polymer material such as a water-repellent / hydrophobic nonwoven fabric, a natural fiber such as waterproof paper, and a polylaminate paper.

  The material of the absorbent layer 260 is not particularly limited as long as it can absorb menstrual blood quickly, like the vaginal opening absorber body 310. As an example, the same material as the vaginal opening absorber body 310 can be cited.

  Here, a water-absorbing resin made of a water-soluble polymerizable monomer containing an amphiphilic polymer having a protein adsorption inhibiting effect may be used for part or all of the absorbing layer 260.

  The water-absorbent resin has high blood absorbability, and can be obtained by simply mixing an amphiphilic polymer into an aqueous solution of a water-soluble polymerizable monomer before polymerization of the water-soluble polymerizable monomer. Polymerization after mixing these two substances forms a semi-interpenetrated polymer networks structure consisting of these two substances, resulting in water-soluble polymerization of the amphiphilic polymer. It will be physically fixed to the polymer composed of the polymerizable monomer. If this method is used, a special process such as a heating process is not necessary even in comparison with a method for producing a normal water absorbent resin that does not contain an amphiphilic polymer. The water absorbent resin can be easily produced.

  That is, when the water-absorbing resin is produced by aqueous solution polymerization, the water-soluble polymerizable monomer becomes a water-absorbing resin through each step of a polymerization step, a dehydration step, a pulverization step, a surface cross-linking treatment step, and a drying step. For water-absorbent resins, an amphiphilic polymer is added just before the polymerization step. Similarly, when the water-absorbent resin is prepared by reverse phase suspension polymerization, the amphiphilic polymer is added just before the polymerization step. By producing in this way, there is also an advantage that the surface cross-linking treatment step performed for many water-absorbing resins in order to avoid gel blocking becomes unnecessary.

  Specifically, first, a water-soluble polymerizable monomer aqueous solution containing 15 to 100 w% of amphiphilic polymer as a weight with respect to the monomer is dissolved in advance in an aqueous solution of the water-soluble polymerizable monomer, and the resulting amphiphilic polymer is contained. After further adding a crosslinking agent and an initiator, thermal polymerization is performed. The gel obtained is heated and dried, and then physically pulverized to obtain water-absorbing resin fine particles having a particle size of 100 to 2000 μm. In addition, a water-soluble polymerizable monomer is suspended by high-speed stirring in a non-aqueous organic solvent that does not dissolve it, and polymerized by heating, or a polymer aqueous solution derived from a water-soluble polymerizable monomer Examples of the water-absorbing resin may be a polymer cross-linking method in which a cross-linking agent is used later for cross-linking.

  The water-soluble polymerizable monomer is not particularly limited as long as it is used for a commercial hygiene product. For example, sodium acrylate (hereinafter abbreviated as “AANa”) monomer is used to dry a sodium polyacrylate (hereinafter referred to as “PAANA”) gel that has been gelled by radical polymerization with a crosslinking agent and a polymerization initiator. The body is mentioned. In addition, hydrolyzate of starch-acrylonitrile copolymer, saponified product of copolymer of vinyl ester and unsaturated carboxylic acid or its derivative, graft copolymer cross-linked product of starch-acrylic acid (or salt), acrylic acid A copolymer of (salt) and a sulfonic acid (salt) -containing monomer, an isobutylene-maleic anhydride copolymer crosslinked product, or a dried product of a crosslinked product of a carboxymethyl cellulose derivative can be used as the water-absorbent resin in the present invention.

  As the amphiphilic polymer, one having not only a hydrophilic / hydrophobic modification effect on the surface of the water-absorbent resin but also a protein adsorption inhibiting effect is used. The amphiphilic polymer used here has a hydrophilic region in order to prevent the hydrophobic regions of the water-absorbent resin from being bonded to each other. Free to avoid protein adsorption due to non-ionic to avoid adsorption due to electric interaction, make the surface of water-absorbent resin soft, and the mobility of polymer chains It is not particularly limited as long as it is a substance satisfying the three conditions of being a sufficiently long chain polymer having a terminal chain. Preferably, polyethylene glycol (carbon number 2, hereinafter abbreviated as “PEG”), polypropylene glycol (carbon number 3, hereinafter abbreviated as “PPG”), which is a polyalkylene oxide having 2 to 4 carbon atoms in the alkylene group, Examples thereof include polybutylene glycol (having 4 carbon atoms, hereinafter abbreviated as “PBG”), polyoxyethyleneoxypropylene glycol, and polyoxyethyleneoxybutylene glycol and derivatives thereof. These polyalkylene oxides are considered to have high biocompatibility and high protein adsorption inhibition ability.

  Here, the molecular weight of the amphiphilic polymer to be added is preferably 1000 to 500,000, more preferably 2000 to 100,000, still more preferably 3000 to 75,000, and most preferably 4000 from the viewpoint of diffusibility and viscosity of the aqueous solution. ~ 50000. By using an amphiphilic polymer of this molecular weight, the amphiphilic polymer can be physically entangled inside and on the surface of the water-absorbent resin without using any other special additive. In addition, the desired water-absorbing resin can be obtained. If the molecular weight of the amphiphilic polymer to be added is too small, it will diffuse through the gel network of the water-absorbent resin, reducing the surface adsorption of the protein, and if too large, the viscosity of the reaction solution during polymerization May not lead to proper synthesis. The optimum value of which molecular weight should be used depends on the amount of amphiphilic polymer added, the preparation conditions of the water-soluble polymerizable monomer, and the like.

  In addition, when the amount of the amphiphilic polymer added is small, the protein surface adsorption inhibiting ability is low, but when it is large, the liquid absorbent ability of the water-absorbent resin is impaired. Similarly to the above, it is also determined by the conditions during polymerization. The addition amount of the amphiphilic polymer is preferably 15 to 100% by weight, more preferably 17 to 95% by weight, and most preferably 20 to 90% by weight based on the monomer. Within this range, protein surface adsorption can be suppressed, and the amount of menstrual blood absorbed can be increased.

  The water-absorbing resin containing an amphiphilic polymer produced by the above method is obtained by drying a gel-like polymer mainly composed of a polymer of a water-soluble polysynthetic monomer and a nonionic amphiphilic polymer. The surface of the water-absorbent resin has an amphiphilic polymer chain with sufficient mobility to prevent protein adsorption, and the water-absorbent resin has a water-soluble polymerizable monomer inside. It is a mixture of polymer and amphiphilic polymer.

  The above water-absorbent resin suppresses the adsorption of blood cells and protein components to the resin surface and the adsorption between the resins, and therefore has very little gel blocking by blood. As a result, a large amount of blood can be absorbed as compared with a water-absorbing resin by a conventional method. Furthermore, blood absorption multiple times, that is, repeated absorption is also possible.

  In addition, the water-absorbing resin can be easily manufactured by partially improving the existing manufacturing process and manufacturing apparatus because it is only necessary to add an aqueous solution of an amphiphilic polymer during polymerization of the water-soluble polymerizable monomer.

  Furthermore, when the water-absorbent resin is used as an absorbent body for sanitary napkins, the amount of pulverized pulp used to supplement the water-absorbing power of the water-absorbent resin can be suppressed. In addition, unlike conventional sanitary napkins, diffusible low molecules do not occur when blood is absorbed, and thus there is little possibility of causing rash.

  In the napkin with the vaginal opening absorber according to the present invention, the vaginal opening absorber and the napkin body are bonded. For this reason, after use, it is possible to grasp and remove the part of the napkin body where menstrual blood is not attached, and it is hygienic without attaching menstrual blood to the finger. At this time, since the vaginal opening absorber does not come out of contact with the clothes, the possibility of soiling the clothes is extremely low. Furthermore, since only one garbage is required after use, post-processing is easy.

  Moreover, the napkin with a vaginal opening absorber according to the present invention relays menstrual blood that has come out of the vaginal opening to the absorption region center of the napkin body. For this reason, there is no worry about dispersion absorption and leakage of menstrual blood away from the vaginal opening, and the absorbent body of the napkin body can be used effectively, so the area of the absorbent body is reduced and the overall size of the napkin Can be reduced.

  The present invention is suitable for use in sanitary napkins. In particular, it is useful as a sanitary napkin that is used when menstrual leakage is likely to occur at bedtime.

The perspective view of the napkin with a vaginal opening absorber which concerns on one embodiment of this invention Top view of the napkin with the vaginal opening absorber shown in FIG. Side view of the napkin with the vaginal opening absorber shown in FIG. 1 is a longitudinal sectional view of the vaginal opening absorber shown in FIG. The perspective view of the napkin with a vaginal opening absorber concerning another form of the present invention. Top view of the napkin with the vaginal opening absorber shown in FIG. The perspective view of the napkin with a vaginal opening absorber which concerns on another form of this invention. Cross section of napkin body

Explanation of symbols

DESCRIPTION OF SYMBOLS 100 Napkin with vaginal opening absorber 200 Napkin main body 210 Skin side surface 220 Clothing side surface 230 Absorption area 240 Surface sheet 250 Diffusion layer 260 Absorption layer 270 Back surface sheet 300 Vaginal opening absorber 310 Vaginal opening absorber body 320 Vaginal opening absorber storage Bag 330 Bonding point 340 Supporting part 350, 360 Attaching part

Claims (6)

A napkin body having an absorbent layer that absorbs menstrual blood, and an absorbent body tethered and arranged on the upper surface of the napkin body.
The absorbent body is an napkin with an absorbent body that has an absorbent body that absorbs menstrual blood and passes the absorbed menstrual blood to the napkin body, and an absorbent body storage bag that stores the absorbent body.   The napkin with an absorber according to claim 1, wherein the absorbent body is locked to an upper surface of the napkin main body in front of the mounting direction. On the upper surface of the napkin main body, it further has a support part that supports on both sides in the mounting direction,
The support portion is arranged such that the movable area of the absorber in the front in the mounting direction is narrower than the movable area in the rear in the mounting direction.
The napkin with an absorber according to claim 1.   The napkin with an absorber according to claim 1, wherein the absorbent body is detachably locked to an upper surface of the napkin body. The napkin body further includes a top sheet that passes menstrual blood into the napkin body, and a back sheet that prevents external leakage of menstrual blood absorbed in the napkin body.
The absorbent body storage bag and the top sheet are water permeable,
The napkin with an absorber according to claim 1, wherein the back sheet is impermeable.   The napkin with an absorber according to claim 1, wherein the absorbent layer has a water-absorbing resin in which a polymer of a water-soluble polymerizable monomer and a nonionic amphiphilic polymer form a semi-interpenetrating polymer network structure.

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