TW202216098A - Absorbent article - Google Patents

Abstract

An absorbent article is provided which feels better against the skin and which can prevent the leakage of bodily fluid from the ends in the width direction, that is, can prevent side leakage, even for large amounts of bodily fluid. In this absorbent article (1), in the width direction, the length of an auxiliary sheet (5) positioned between a surface sheet (2) and an absorbent body (4) is greater than the length of the surface sheet, and the ends of the auxiliary sheet extend to outside of the ends of the surface sheet. The surface sheet includes a central area (CA) which is positioned in the center part in the width direction, and a pair of end areas (EA) which are positioned at the two ends in the width direction and which are adjacent to the outside of the central area on both sides in the width direction. The length in the thickness direction of each of the pair of end areas is greater than the length in the thickness direction of the central area.

Description

absorbent articles

The present invention relates to absorbent articles.

Absorbent articles that prevent excretion of body fluids (eg, menstrual blood) from leaking easily are known. For example, Patent Document 1 discloses an absorbent article capable of improving the retention of bodily fluids. This absorbent article is provided with a liquid-permeable upper sheet on the skin-contacting surface side of the top sheet. The upper sheet is located in the center portion in the width direction, is arranged along the longitudinal direction, and has a center region including the excretion port abutting region. The absorbent article system has an upper layer press section that compresses the surface sheet and the upper layer sheet in the thickness direction, and an absorber press section that compresses the surface sheet and the absorber in the thickness direction. The absorber press part is located on the outer side in the width direction rather than the upper sheet, and has a longitudinal direction press part formed along the longitudinal direction. [Prior Art Literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2012-239712

[Problems to be Solved by Invention]

In the absorbent article of Patent Document 1, both ends of the upper sheet in the width direction are not joined to the surface sheet, and the thickness of both ends in the width direction of the upper sheet is the same as or thinner than the thickness of the central portion. Therefore, the amount of body fluid that can be held by the voids between the constituent fibers of the upper layer sheet is smaller at both ends in the width direction of the upper layer sheet than at the central portion. As a result, when the absorbent article is used, when the amount of bodily fluid is large, the bodily fluid diffused from the center of the upper sheet toward the ends in the width direction may overflow from the ends without staying in the upper sheet. In other words, the length in the width direction of the upper sheet is smaller than the length in the longitudinal direction. Therefore, before the diffusion of the bodily fluid to both sides in the longitudinal direction sufficiently progresses, the diffusion of the bodily fluid to the ends in the width direction proceeds first, and some bodily fluids spread from the width direction. There is a risk of leakage from the end of the direction to the outside. Moreover, since the upper layer sheet with high water retention is located closer to the skin than the surface sheet, if the upper layer sheet holding the bodily fluid is brought into contact with the excretory opening, there is a possibility of poor skin feel.

An object of the present invention is to provide an absorbent article which can suppress leakage of bodily fluids from the ends in the width direction, that is, lateral leakage, and can improve the feel of the skin even when the amount of bodily fluids is large. [Technical means to solve problems]

The absorbent article of the present invention is as follows. (1) An absorbent article having a longitudinal direction, a width direction, and a thickness direction, and comprising a surface sheet, an absorber, and an auxiliary sheet positioned between the surface sheet and the absorber, characterized by: In the width direction, the length of the auxiliary sheet is larger than the length of the surface sheet, Both ends of the auxiliary sheet extend toward the outer sides of the two end edges of the top sheet, respectively, The aforementioned surface flakes include: a central area located at the central portion in the aforementioned width direction; and A pair of end regions located at both ends in the width direction and adjacent to both outer sides of the center region in the width direction, The length in the thickness direction of each of the pair of end regions is larger than the length in the thickness direction of the center region. [Inventive effect]

According to the present invention, even if the amount of body fluid is large, it is possible to provide an absorbent article which can suppress the leakage of body fluid from the ends in the width direction, that is, lateral leakage, and can improve the feel of the skin.

This embodiment discloses the following aspects. [Aspect 1] An absorbent article, which has a length direction, a width direction and a thickness direction, and includes a surface sheet, an absorber, and an auxiliary sheet located between the surface sheet and the absorber, and is characterized by: In the width direction, the length of the auxiliary sheet is larger than the length of the surface sheet, Both ends of the auxiliary sheet extend toward the outer sides of the two end edges of the top sheet, respectively, The aforementioned surface flakes include: a central area located at the central portion in the aforementioned width direction; and A pair of end regions located at both ends in the width direction and adjacent to both outer sides of the center region in the width direction, The length in the thickness direction of each of the pair of end regions is larger than the length in the thickness direction of the center region.

In this absorbent article, the surface sheet is formed in the width direction so that the thickness of each of the pair of end regions is larger than the thickness of the central region. That is, in the surface sheet, the thickness of both end portions in the width direction is larger than the thickness of the central portion. Therefore, the end portions in the width direction of the top sheet have a larger amount of bodily fluid that can be held by the voids between the constituent fibers of the top sheet than the central portion, and can function like a bank protruding toward the skin side. As a result, when the absorbent article is used, even if the amount of body fluid (for example, menstrual blood) is large, the body fluid that diffuses from the center of the top sheet to the end and through the interior or surface of the top sheet tends to accumulate on the top sheet. the end portion, can prevent leakage from the end portion to the outside. Moreover, since the both ends of the top sheet in the width direction are thick and the center part is thin, the contact of the center part to the excretion opening can be weakened, and the skin feel can be improved. In this way, in this absorbent article, even when there is a large amount of bodily fluids, lateral leakage of bodily fluids can be suppressed, and the touch of the skin can be improved.

[Aspect 2] The absorbent article according to Aspect 1, wherein the fiber density of each of the pair of end regions is lower than the fiber density of the center region. In this absorbent article, the surface sheet is formed so that the fiber density of each of the pair of end regions becomes lower than the fiber density of the central region. That is, in the surface sheet, the fiber density at both ends in the width direction is lower than the fiber density at the center. Therefore, even if a large amount of bodily fluid flows in the width direction inside the surface sheet due to capillary action, the fiber density at the end portion is relatively low, so that the bodily fluid does not easily diffuse toward the end portion. Moreover, since the fiber density of the both ends in the width direction of the surface sheet is relatively low, a soft touch can be imparted. In this way, in this absorbent article, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be further suppressed, and the skin feel can be further improved.

[Aspect 3] The absorbent article according to Aspect 1 or 2, wherein the fiber density on the skin side of each of the pair of end regions is higher than the fiber density on the non-skin side. In this absorbent article, the surface sheet is formed so that the fiber density on the skin side of each of a pair of end regions becomes higher than the fiber density on the non-skin side. That is, in the surface sheet, the fiber density on the skin side of both ends in the width direction is higher than the fiber density on the non-skin side. Therefore, the body fluid diffused from the center of the top sheet toward the end portion can be prevented from migrating toward the non-skin surface side of the end portion, and the surface of the auxiliary sheet located on the lower side in the thickness direction of the end portion can be prevented from traveling easily. Thereby, since the bodily fluid which reached the edge part can stay at the edge part, and it is hard to move in the width direction, other bodily fluid can easily move from the center part toward the downward direction of the thickness direction, ie, toward the absorber. In this way, in this absorbent article, even when the amount of bodily fluid is large, movement of the bodily fluid in the width direction can be restricted, and lateral leakage can be further suppressed.

[Aspect 4] The absorbent article according to any one of aspects 1 to 3, further comprising a pair of pressing portions formed by pressing the surface sheet, the auxiliary sheet, and the absorber, and extending along the longitudinal direction, and are arranged at intervals in the aforementioned width direction, The edge of the outer side in the width direction of each of the pair of end regions is the outer side in the width direction of each of the pair of compression portions. In this absorbent article, the edge of the outer side in the width direction of each of the pair of end regions is located on the outer side in the width direction of each of the pair of compressed portions. Thereby, when the absorbent article is used, the portion of the absorbent article that is outside of the pair of compressed portions is deformed toward the skin side from the pair of compressed portions as a starting point, and accordingly, the surface sheet is more compressed than the pair of compressed portions. The portions of the outer pair of end regions are similarly deformed toward the skin side. That is, both ends in the width direction of the top sheet are deformed toward the skin side. Therefore, both ends of the top sheet in the width direction can function as banks protruding toward the skin side, thereby allowing the body fluids diffused from the center of the top sheet to the ends to stay at the ends of the top sheet. Suppression of leakage from the end to the outside.

[Aspect 5] The absorbent article according to any one of Aspects 1 to 4, wherein each of the pair of end regions is non-bonded to the auxiliary sheet. In this absorbent article, the surface sheet is formed so that each of a pair of end regions is not joined to the auxiliary sheet. That is, in the surface sheet, both ends in the width direction are not joined to the auxiliary sheet. Therefore, the bodily fluid diffused from the center portion toward the end portion of the top sheet can be made less likely to migrate toward the auxiliary sheet located on the outer side in the width direction than the end portion. Moreover, since the both ends in the width direction of the top sheet are not joined to other materials, and the degree of freedom is high, it is possible to improve the followability to the skin surface at the both ends. In this way, in this absorbent article, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be further suppressed, and the skin feel can be further improved.

[Aspect 6] The absorbent article according to aspect 5, wherein the length in the width direction of the absorber is smaller than the length in the width direction of the topsheet, In a plan view, the pair of end regions are located on both outer sides of the absorber in the width direction, respectively. In this absorbent article, in the width direction, the length of the absorber is smaller than the length of the surface sheet, and in a plan view, a pair of end regions are located on both outer sides of the absorber. Therefore, when an absorbent article is used, when the absorbent article is sandwiched between both thighs and a force toward the inner side in the width direction is applied to the absorbent body, a pair of end regions that are not joined in the portion located on the outer side of the absorbent body become It is easy to stand up to the skin side. That is, the both ends of the width direction of a top sheet can be made to stand up to the skin side relatively. Thereby, the amount of bodily fluids toward the ends in the width direction of the top sheet can be reduced. Therefore, in this absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be suppressed more.

[Aspect 7] The absorbent article according to Aspect 5 or 6, further comprising a pair of end presses that press the top sheet, the auxiliary sheet, and the absorber so as to span the width direction of the pair of end regions. Formed in the manner of the outer edge. This absorbent article is provided with a pair of edge part press part, and is formed so that the edge of the outer side of the width direction of each of a pair of edge part region may be bridged. That is, an edge press part is formed so that the edge of the outer side of the width direction of a top sheet may be bridged. Therefore, when an absorbent article is used, when bodily fluid diffused from the center of the top sheet reaches the end, a part of the bodily fluid can be sucked into the absorber below the top sheet and the auxiliary sheet through the end press part. Thereby, the bodily fluid in the edge part of the width direction of a top sheet can be suppressed, and it can suppress that a bodily fluid migrates from an edge part to an outer side, and further migrates to an outer side. Therefore, in this absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be suppressed more.

[Aspect 8] The absorbent article according to any one of Aspects 1 to 7, further comprising a pair of auxiliary presses, which are only the auxiliary presses, on the outside of the pair of end regions in the width direction in a plan view. Flakes are pressed to form. The absorbent article further includes a pair of auxiliary presses that press only one of the auxiliary sheets on the outside of the pair of end regions in the width direction. That is, in the width direction, an auxiliary press section is formed in the auxiliary sheet on the outer side of the outer edge of the surface sheet. Therefore, when an absorbent article is used, even if bodily fluid diffused from the central portion of the top sheet leaks from the end portion to the outside, the bodily fluid can be sucked into the absorber below the auxiliary sheet through the auxiliary pressing portion. Therefore, in this absorbent article, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be suppressed more.

[Aspect 9] The absorbent article according to any one of Aspects 1 to 8, wherein the mass density of the surface sheet is lower than the mass density of the auxiliary sheet. In this absorbent article, the mass density of the surface sheet is lower than the mass density of the auxiliary sheet. Therefore, when the absorbent article is used, even when the amount of bodily fluid is large, the bodily fluid can be moved in the thickness direction from the surface sheet having a low mass density to the auxiliary sheet having a high mass density. Thereby, it is possible to reduce the amount of movement of the bodily fluid to the end portion in the width direction of the top sheet. Therefore, in this absorbent article, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be suppressed more.

[Aspect 10] The absorbent article according to any one of Aspects 1 to 9, wherein, in a plan view, in the width direction, the edge of the topsheet is more outward than the edge of the topsheet is viewed from the center of the topsheet. Partial viewing makes it easier to confirm the color of the aforementioned absorber. In this absorbent article, in a plan view, it is easier to check the color of the absorber (including the absorber when the absorber absorbs bodily fluids) when viewed from the outer portion of the edge of the topsheet rather than the central portion of the topsheet. s color). That is, the color of the absorber viewed through the outer portion of the surface sheet (auxiliary sheet) is closer to the actual color than the color of the absorber viewed through the central portion of the surface sheet (surface sheet and auxiliary sheet). The color of the absorber. Here, in a plan view, the position of the end portion in the width direction of the absorber is substantially the same as the position of the portion outside the surface sheet. Therefore, by confirming the color of the absorber recognized on the outer side of the surface sheet, it is possible to confirm whether or not the absorber has absorbed body fluid up to the end in the width direction of the absorber. Thereby, it is possible to avoid a situation where the body fluid cannot be completely absorbed by the absorber and lateral leakage occurs because the time to replace the absorbent article is not found until the end portion in the width direction of the absorber absorbs the body fluid.

[Aspect 11] The absorbent article according to any one of aspects 1 to 10, further comprising a pair of side sheets joined to both ends of the auxiliary sheet in the width direction and extending in the longitudinal direction, In a plan view, a pair of low-rigidity portions having low rigidity are provided between the center portion in the width direction and both end portions in the width direction. This absorbent article has a low rigidity between the central part (surface sheet, auxiliary sheet, and absorber) in the width direction and both end parts (side sheet, auxiliary sheet, and absorber) in the width direction in a plan view. For the low-rigidity part (auxiliary sheet and absorber). Therefore, when an absorbent article is used, it is easy to deform the absorbent article into a substantially W-shape when viewed from the longitudinal direction, starting from the pair of low-rigidity portions. That is, the both ends of the width direction of an absorbent article can be raised relatively to the skin side. Thereby, the amount of bodily fluids toward the ends in the width direction of the top sheet can be reduced. Therefore, in this absorbent article, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be suppressed more.

Next, the embodiment concerning the absorbent article of this invention is demonstrated.

The absorbent article of the embodiment will be described by taking a sanitary napkin as an example. However, the type and application of the absorbent article of the present invention are not limited to this example, and can be applied to other absorbent articles without departing from the technical idea of the present invention. As other absorbent articles, for example, a pad, a light incontinence pad, a disposable diaper, etc. are mentioned.

1 and 2 are diagrams showing a configuration example of the absorbent article 1 according to the embodiment. FIG. 1 is a plan view of the state in which the absorbent article 1 has been unfolded, and FIG. 2 is a cross-sectional view taken along line II-II of FIG. 1 . The absorbent article 1 has the longitudinal direction L, the width direction W, and the thickness direction T which are orthogonal to each other. In the absorbent article 1 shown in FIG. 1 , the upper side and the lower side in the figure are the front side and the rear side in the longitudinal direction L, respectively, and the left side and the right side are the left side and the right side in the width direction W, respectively, and the front side is the front side of the paper. and the deep side as the upper side and the lower side in the thickness direction T, respectively. The absorbent article 1 has: a longitudinal center line CL (imaginary line) extending in the longitudinal direction _L through the center in the width direction W; and a width direction center line C extending in the width direction W through the center in the longitudinal direction L _W (imaginary line). The directions and sides toward the longitudinal center line _CL are referred to as the inner direction and the inner side in the width direction W, respectively, and the directions and sides away from the width direction W are referred to as the outer direction and outer side in the width direction W, respectively. In addition, the direction and side toward the width direction center line _CW are respectively referred to as the inner direction and the inner side in the longitudinal direction L, and the direction and side away from the longitudinal direction L are referred to as the outer direction and outer side, respectively. In addition, the absorbent article 1 placed on the plane including the longitudinal direction L and the width direction W viewed from the upper side in the thickness direction T is referred to as a plan view, and the shape grasped in the plan view is referred to as a plane shape. An arbitrary direction in a plane including the longitudinal direction L and the width direction W is referred to as a plane direction. When the absorbent article 1 has been worn on the wearer, in the thickness direction T, the sides that are relatively close to and away from the skin surface of the wearer are referred to as the skin side and the non-skin side, respectively. These definitions are also commonly used for each material used for the absorbent article 1 .

In the present embodiment, the absorbent article 1 (excluding the flap portion) has a substantially rectangular shape that is long in the longitudinal direction L and short in the width direction W in a plan view, and both ends of the longitudinal direction L have Slightly semicircular shape. The shape of the absorbent article 1 is not particularly limited as long as it is long in the longitudinal direction L and short in the width direction W, and examples thereof include a rounded rectangle, an oval, a gourd, and an hourglass clock. The absorbent article 1 is provided with one pair of flap parts 9 extending toward both outer sides in the width direction W from a substantially rectangular-shaped part. The fin portion 9 has a slightly trapezoidal shape. However, the shape may be, for example, a semicircle, a semiellipse, or the like.

The absorbent article 1 includes the top sheet 2 , the auxiliary sheet 5 , and the absorber 4 , and in the present embodiment, further includes the back sheet 3 and the clothing fixing portion 7 . The surface sheet 2 is a liquid-permeable sheet, and constitutes the skin-side surface of the absorbent article 1 in this embodiment. The auxiliary sheet 5 is a liquid-permeable sheet, and is laminated on the non-skin side of the top sheet 2 in this embodiment. The absorber 4 is a liquid-absorbing and liquid-retaining material, and is located between the top sheet 2 (and the auxiliary sheet 5 ) and the back sheet 3 . The back sheet 3 is a liquid-impermeable sheet, and in this embodiment, constitutes the surface of the non-skin side of the absorbent article 1 . The clothing fixing portion 7 is an adhesive for joining the absorbent article 1 to the skin side of the underwear, and is located on the non-skin side surface of the back sheet 3 in this embodiment. Therefore, in the absorbent article 1 , the top sheet 2 , the auxiliary sheet 5 , the absorber 4 , the back sheet 3 , and the clothing fixing portion 7 are tied in the thickness direction T, and are laminated in this order. In addition, the absorbent article 1 may further include an exterior sheet on the non-skin side of the back sheet 3 .

In the present embodiment, the absorbent article 1 further includes a pair of side sheets 6 and a pair of clothing fixing portions 8 . The pair of side sheets 6 are hydrophilic or water-repellent sheets, and are located on both sides in the width direction W of the auxiliary sheet 5 in this embodiment. The pair of side sheets 6 are on the inner side in the width direction W, and include a pair of leak-proof walls 16 extending along the longitudinal direction L. As shown in FIG. The pair of leak-proof walls 16 (FA) have their outer ends in the width direction W as fixed ends 16E1 and are joined to the auxiliary sheet 5 and their inner ends as free ends 16E2 and are not joined to the member. The leak-proof wall 16 may also have an elastic member extending along the length direction L at the free end 16E2. In the width direction W, the end edge 2E of the surface sheet 2 in the width direction W is separated from the fixed end 16E1 and the free end 16E2 of the leak-proof wall 16 opposite in the width direction W, so the auxiliary sheet 5 is exposed in a plan view. between the surface sheet 2 and a pair of leak-proof walls 16 . The pair of clothing fixing portions 8 are adhesives for joining the pair of flap portions 9 to the non-skin side of the underwear, and are located on the non-skin side surface of the back sheet 3 of the pair of flap portions 9 in this embodiment.

In the present embodiment, the top sheet 2 has a substantially rectangular shape long in the longitudinal direction L and short in the width direction W, and both ends in the longitudinal direction L have a substantially semicircular shape. The top sheet 2 includes: a first fiber layer 2a containing water-retaining fibers; and a second fiber layer 2b containing water-retaining fibers and hydrophobic fibers. The skin-side surface of the first fiber layer 2a constitutes the skin-side surface of the top sheet 2, and the non-skin-side surface is in contact with the skin-side surface of the second fiber layer 2b. The surface on the non-skin side of the second fiber layer 2b constitutes the surface on the non-skin side of the top sheet 2 . In addition, the surface sheet 2 may be one of the first fiber layer 2a and the second fiber layer 2b, or may be three layers further provided with other fiber layers. In addition, the types of the constituent fibers of each of the first fiber layer 2a and the second fiber layer 2b are not limited to the above-mentioned examples as long as the surface sheet 2 can be a liquid-permeable sheet.

The auxiliary sheet 5 has a substantially rectangular shape long in the longitudinal direction L and short in the width direction W, and both ends in the longitudinal direction L have a substantially semicircular shape. The auxiliary sheet 5 has a shape slightly larger in the width direction W than the surface sheet 2 . Therefore, the length (width) in the width direction W of the auxiliary sheet 5 is larger than the length (width) in the width direction W of the top sheet 2 . In addition, in a plan view, both ends of the width direction W of the auxiliary sheet 5 extend to the outside of each of the end edges 2E of the top sheet 2 in the width direction W, respectively. Therefore, both end edges 5E in the width direction W of the auxiliary sheet 5 are respectively located outside of the both end edges 2E in the width direction W of the top sheet 2 . In the present embodiment, the length (width) in the width direction W of the auxiliary sheet 5 is substantially the same as the length (width) in the width direction W of the absorber 4 .

In this embodiment, the surface sheet 2 and the auxiliary sheet 5 are bonded to each other by an adhesive (not shown, for example, a hot melt adhesive). The adhesive is extended along the longitudinal direction L, and is applied to the surface sheet 2 or the auxiliary sheet 5 (not shown) in a plurality of predetermined patterns arranged in the width direction W. As a predetermined pattern, a stripe shape, the repeated shape of an omega, the repeated shape of a wave, etc. are mentioned, for example. The adhesive is applied to a region that is approximately line-symmetrical with respect to the longitudinal center line _CL .

The top sheet 2 includes (divisions): a central area CA located at the center of the width direction W; EA. The range in the width direction W of one pair of end regions EA of the surface sheet 2 is such that the remaining portion of the central region CA is not included. In the present embodiment, the central area CA and the pair of end areas EA are each partitioned by a pair of imaginary boundary lines 17 extending along the longitudinal direction L, respectively.

In the present embodiment, the central area CA is an area where the adhesive is applied in the predetermined pattern, and the pair of end areas EA are areas adjacent to both outer sides of the central area CA in the width direction W where the adhesive is not applied. That is, the central area CA is an area joined to the auxiliary sheet 5 , and the pair of end areas EA are areas that are not joined to the auxiliary sheet 5 . Therefore, the pair of boundary lines 17 respectively show the outer edges of the regions where the adhesive is present in the width direction W. As shown in FIG. At this time, each of the pair of end regions EA connects the inner end edge of the width direction W and the end edge of the central region CA as fixed ends, and the outer end edge of the width direction W (excluding the two edges in the longitudinal direction L) is used as a fixed end. end) without any member joining as a free end. That is, each of the pair of end regions EA has a structure in which the free ends of the pair of end regions EA can easily move with respect to the auxiliary sheet 5 in the thickness direction T, so that a gap V can be generated between the pair of end regions EA and the auxiliary sheet 5, and it can be The structure standing up from the auxiliary sheet 5 . In addition, the end region EA may be partially joined to the auxiliary sheet 5, the side sheet 6, and the like.

In addition, the central region CA may be a region where the first fiber layer 2a and the second fiber layer 2b are joined to each other, and the pair of end regions EA may be a region where the first fiber layer 2a and the second fiber layer 2b are not joined to each other. . In this case, each of the pair of end regions EA has a structure in which the first fiber layer 2 a and the second fiber layer 2 b are easily moved relative to each other, and can be further raised from the auxiliary sheet 5 . In addition, a pair of edge part area|region EA may mutually join the 1st fiber layer 2a and the 2nd fiber layer 2b, respectively.

In the present embodiment, both the central area CA and the pair of end areas EA are line-symmetric with respect to the longitudinal center line _CL . In the width direction W, the range of the central area CA of the top sheet 2 is, for example, a range of 80 to 96% of the length of the top sheet 2 . If it is less than 80%, the length in the width direction W of the end region EA becomes long, and there is a possibility that it may be rolled up. In this way, the wearer is likely to feel uncomfortable in the rolled-up portion. Then, a gap is formed between the top sheet 2 in the vicinity of the rolled-up portion and the wearer's skin surface, so that bodily fluids tend to leak along the wearer's skin surface. If it exceeds 96%, the center area CA and the auxiliary sheet 5 are joined together, so that the end area EA becomes easy to adhere to the auxiliary sheet 5, and it becomes difficult to move and stand up from the auxiliary sheet 5 easily.

The length (thickness) d2 in the thickness direction T of each of the pair of end regions EA is larger than the length (thickness) d1 in the thickness direction T of the central region CA. Therefore, each of the pair of end regions EA has a larger amount of bodily fluid that can be held by the voids between the constituent fibers of the surface sheet 2 than the central region CA, and can function like a bank that protrudes in the thickness direction T toward the skin side. .

In the present embodiment, the adhesive agent is applied to the central area CA, and is pressed against the auxiliary sheet 5 in a state of spreading in the thickness direction T to join. Therefore, the thickness of the central region CA is relatively thinner than before bonding. In addition, each of the pair of end regions EA is disposed on the auxiliary sheet 5 in a state in which no adhesive is applied. Therefore, the thickness of the end region EA is almost the same as before joining. Thereby, the length (thickness) d2 of the thickness direction T of the edge part area|region EA can be made larger than the length (thickness) d1 of the thickness direction T of the center area|region CA. In another embodiment, the central area CA is formed by one layer of sheet members of the topsheet 2, and each of the pair of end regions EA is formed by the sheet members of the topsheet 2 facing the inner side in the width direction W, and facing the skin side or the thickness direction T in the thickness direction T. It is formed by folding over the non-skin side. Accordingly, the length (thickness) d1 in the thickness direction T of the central region CA becomes the thickness of one layer of the sheet member of the cover sheet 2, and the length (thickness) d2 in the thickness direction T of each of the pair of end regions EA becomes the cover sheet The thickness of the two-layer sheet member of 2 is formed so that d1<d2.

Similarly, when the adhesive agent is applied between the first fiber layer 2a and the second fiber layer 2b in the central region CA to be bonded to each other, the thickness of the central region CA becomes relatively thinner than before bonding. Moreover, when the 1st fiber layer 2a and the 2nd fiber layer 2b are laminated|stacked without applying an adhesive agent in each pair of edge part area|region EA, the thickness of edge part area|region EA is almost the same as before joining. Therefore, in these cases, the length (thickness) d2 in the thickness direction T of the end region EA can be made larger than the length (thickness) d1 in the thickness direction T of the central region CA.

In addition, the method of making the length d2 of the thickness direction T of the edge part area|region EA larger than the length d1 of the thickness direction T of the center area|region CA is not limited to the said example. As this method, for example, a method of arranging another nonwoven fabric sheet between each of the pair of end regions EA and the auxiliary sheet 5, and between the first fiber layer 2a and the second fiber layer 2b of the pair of end regions EA can be mentioned. Methods of arranging other non-woven sheets, etc.

In the absorbent article 1, the topsheet 2 is formed in the width direction W so that the thickness of each of the pair of end regions EA is larger than the thickness of the central region CA. That is, in the surface sheet 2, the thickness of both end parts (end part area|region EA) in the width direction W is larger than the thickness of the center part (central area|region CA). Therefore, the amount of bodily fluid that can be held by the voids between the constituent fibers of the top sheet 2 increases at both ends in the width direction W of the top sheet 2 compared to the central portion, and functions like a bank protruding toward the skin side. . As a result, when the absorbent article 1 is used, even if the amount of bodily fluid (for example, menstrual blood) is large, the bodily fluid that diffuses from the center of the topsheet 2 toward the ends and passes through the interior or the surface of the topsheet 2 tends to accumulate. In the edge part of the surface sheet 2, it can suppress that leaking out from the edge part to the outside. Moreover, since the both ends of the width direction W of the top sheet 2 are thick and the center part is thin, the contact of the center part to the excretion opening can be weakened, and the skin feel can be improved. In this way, in this absorbent article 1, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be suppressed, and the skin feel can be improved.

In the absorbent article 1, the topsheet 2 is formed so that each of the pair of end regions EA and the auxiliary sheet 5 are not joined. That is, in the top sheet 2 , both ends (end regions EA) in the width direction W are not joined to the auxiliary sheet 5 . Therefore, the bodily fluid diffused from the center portion (central area CA) of the top sheet 2 toward the end portions can be made less likely to migrate toward the auxiliary sheet 5 located on the outer side in the width direction W than the end portions. In addition, at both ends in the width direction W of the topsheet 2, the amount of bodily fluids that can be held by the voids constituting the fibers can be relatively increased. Moreover, since the both ends of the width direction W of the top sheet 2 are not joined to other materials, and the degree of freedom is high, the followability to the skin surface at the both ends can be improved. In this way, in the absorbent article 1, even when there is a large amount of bodily fluids, lateral leakage of bodily fluids can be further suppressed, and the skin feel can be further improved.

In the present embodiment, the fiber density of each of the pair of end regions EA is lower than the fiber density of the central region CA. Therefore, the body fluid diffused in the width direction W from the center area CA toward the end area EA can be made less likely to spread further forward toward the end area EA. In this embodiment, the end area EA and the center area CA are the same end and center of the surface sheet 2, and the length (thickness) d2 of the end area EA is made larger than the length (thickness) d1 of the center area CA. Therefore, the fiber density of the end region EA can be made lower than the fiber density of the central region CA.

In this way, in the absorbent article 1, in the topsheet 2, the fiber density of both ends (end region EA) in the width direction W is lower than the fiber density of the center portion (center region CA). Therefore, even if a large amount of bodily fluid flows in the width direction W in the surface sheet 2 due to capillary action, the fiber density at the end portion is relatively low, so that the bodily fluid does not easily diffuse toward the end portion. In addition, since the fiber density at both ends in the width direction W of the topsheet 2 is relatively low, it is possible to impart elasticity to both ends, thereby imparting a soft touch. In this way, in the absorbent article 1, even when there is a large amount of bodily fluids, lateral leakage of bodily fluids can be further suppressed, and the skin feel can be further improved.

In the present embodiment, the fiber density on the skin side of each of the pair of end regions EA is higher than the fiber density on the non-skin side. Therefore, the body fluid diffused from the center area CA toward the end area EA can be made difficult to migrate toward the non-skin surface side of the end area EA. In the present embodiment, the fiber density of the first fiber layer 2a on the skin side of the first fiber layer 2a and the second fiber layer 2b constituting the surface sheet 2 is set to be lower than the fiber density of the second fiber layer 2b on the non-skin side high. Therefore, the fiber density on the skin side of the edge region EA can be made higher than the fiber density on the non-skin side. Furthermore, in the case where the surface sheet 2 is a single layer, when the surface sheet 2 is manufactured by stacking fibers on a belt-shaped mesh member, the fiber density on the side that is in contact with the mesh member is higher than the fiber density on the side that is not in contact with the mesh member. As a matter of fact, the surface on the skin side of the top sheet 2 can be the surface in contact with the mesh.

In this way, in the absorbent article 1, in the surface sheet 2, the fiber density on the skin side of both ends (end region EA) in the width direction W is higher than the fiber density on the non-skin side. Therefore, in the width direction W, the body fluid diffused from the central portion (central area CA) of the topsheet 2 toward the end portion can be made less likely to migrate toward the non-skin surface side of the end portion, and it can be made difficult to move toward the thickness direction T at the end portion. The surface of the auxiliary sheet 5 on the lower side moves. Thereby, the bodily fluid reaching the end portion can stay at the end portion and is less likely to travel in the width direction W. Therefore, other bodily fluids can easily travel from the central portion toward the lower side of the thickness direction T, that is, toward the absorber 4 . In this way, in the absorbent article 1, even when the amount of bodily fluid is large, movement of bodily fluid in the width direction W can be restricted, and lateral leakage can be further suppressed.

In this embodiment, the mass density of the surface sheet 2 is made lower than the mass density of the auxiliary sheet 5 . Therefore, when the absorbent article is used, it is easy to move from the top sheet 2 having a low mass density to the auxiliary sheet having a high mass density before most of the bodily fluid excreted in the central region CA moves to the end regions EA in the width direction W 5. Move to the thickness direction T. Thereby, it is possible to reduce the amount of movement of the bodily fluid toward the end (end region EA) in the width direction W of the top sheet 2 . Therefore, in this absorbent article 1, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be further suppressed.

In the present embodiment, the absorber 4 has a substantially rectangular shape long in the longitudinal direction L in a plan view, and both ends in the longitudinal direction L are substantially semicircular. The absorber 4 includes an absorptive core material 4a; and a core material wrapping layer 4b surrounding the absorptive core material. The length (width) in the width direction W of the absorber 4 is larger than the length (width) in the width direction W of the topsheet 2 . Therefore, in a plan view, the pair of end regions EA are respectively located on the inner side of both end edges in the width direction W of the absorber 4 . Thereby, even if the bodily fluid leaks laterally in the width direction W from the pair of end regions EA, it can be absorbed by the absorber 4, so that the final lateral leakage can be suppressed.

In this embodiment, the part of the non-skin side of the auxiliary sheet 5 and the pair of side sheets 6 facing the absorber 4 and the surface of the skin side of the absorber 4 are mutually bonded with a predetermined pattern of adhesive (for example, hot melt adhesive) adhesive) bonding. The auxiliary sheet 5, the pair of side sheets 6 and the non-skin side of the absorber 4 opposite to the back sheet 3 are bonded to the back with a predetermined pattern of adhesive (eg, hot melt adhesive), heat sealing, etc. Sheet 3.

In the absorbent article 1, the center of the longitudinal direction L is slightly forward, and the excretion opening contact area XA is set at the center of the width direction W in a plan view. The excretory opening abutting area XA is an area facing or in contact with the user's excretion opening when the absorbent article 1 is used. The excretion port contact area XA can be appropriately set according to the type, application, and the like of the absorbent article. The excretion port contact area XA is, for example, in the longitudinal direction L, is set slightly forward in the center of the absorber 4, and is set to a length of about 1/10 to 1/2 of the entire length of the absorber 4, and in the width direction W, In the approximate center of the absorber 4 , it is set to a width of about 1/3 to 1/2 of the full width of the absorber 4 .

In the present embodiment, the absorbent article 1 has, in the longitudinal direction L, a longitudinal direction front region _AF , a longitudinal direction central region A _C , and a longitudinal direction rear region _AB . The longitudinal direction central area _AC includes the excretion port contact area XA. The longitudinal direction front area _AF is adjacent to the longitudinal direction _L front of the longitudinal direction central area AC, and includes the end of the longitudinal direction L front of the excretion port contact area XA. The longitudinal direction rear region _AB is adjacent to the longitudinal direction _L rear of the longitudinal direction central region AC, and includes the end portion of the longitudinal direction L rearward of the excretion port contact region XA.

In this embodiment, the absorbent article 1 has a plurality of holes in at least the excretory opening contact area XA of the central area CA. As a plurality of hole portions, for example, the top sheet 2, the auxiliary sheet 5, and the absorber 4 are pressed in the thickness direction T and formed by pressing the top sheet 2, the auxiliary sheet 5, and the absorber 4, for example, a plurality of dot-shaped (circular) pressing portions 15. However, the hole portion is not limited to this example, and other structures, for example, holes (through holes) penetrating from the topsheet 2 to the absorber 4, fibers that are intentionally generated when the topsheet 2 is formed by the entanglement of fibers may be mentioned. The holes (void holes) generated by the block, etc. Furthermore, in the present embodiment, the shape of the press section 15 in a plan view is circular, but other shapes, such as polygons, ellipses, stars, lines, etc., may be used.

In the present embodiment, the absorbent article 1 further includes a pair of press sections (press grooves) 12 , a pair of press sections (press grooves) 13 , and press sections (press grooves) 11 and 14 . The pair of press sections 12 are arranged at intervals on both outer sides of the excretion port contact area XA in the width direction W in a plan view, and extend continuously or intermittently along the longitudinal direction L. The pair of press sections 13 are arranged at intervals in the width direction W at the rear portion of the pair of press sections 12 in the longitudinal direction L, and extend continuously or intermittently along the longitudinal direction L in a plan view. The press parts 11 and 14 are respectively located in the front and rear of the longitudinal direction L of the excretion port contact area XA in a plan view. The press sections 11 to 14 are formed by compressing the top sheet 2 , the auxiliary sheet 5 , and the absorber 4 (the core wrapping layer 4 b and the absorptive core 4 a on the skin side) in the thickness direction T. As shown in FIG. The bottoms in the thickness direction T of the press sections 11 to 14 are located in the absorbent core 4a, but may also reach the core wrapping layer 4b on the non-skin side. In the present embodiment, the shapes of the press sections 11 to 14 in a plan view are linear, but other shapes, such as polygons, circles, ellipses, stars, characters or character strings, etc., may also be used. respective collections. In addition, at least one of the press sections 11 to 14 may not be provided.

In the present embodiment, the outer edge in the width direction W of each of the pair of end regions EA (that is, the outer edge 2E of the top sheet 2 on both sides) is located in each of the pair of press sections 12 or a pair of presses The outer sides in the width direction W of each of the parts 13 . However, the compressed portion 12a of the end portion in the longitudinal direction L in the press section 12 and the compressed portion 13a of the end portion in the longitudinal direction L in the press section 13 are not included. Thereby, when the absorbent article 1 is used, the portion of the absorbent article 1 that is further outside in the width direction W of the pair of press portions 12 (excluding the compressed portion 12a) is directed toward the skin side from the pair of press portions 12 as a starting point. With the deformation, the top sheet 2 can also be deformed toward the skin side in the portion of the pair of end regions EA on the outer side in the width direction W of the pair of press sections 12 in the same manner. The same is true for the portion on the outer side in the width direction W of the absorbent article 1 compared to the pair of press portions 13 (excluding the compressed portion 13a).

In this way, in the absorbent article 1, the part of the pair of end regions EA on the outer side in the width direction W of the top sheet 2 of the pair of press parts 12 (, 13) can be deformed to stand up toward the skin. Therefore, both ends in the width direction W of the top sheet 2 can function as banks protruding toward the skin side. Thereby, in the width direction W, the bodily fluid diffused from the center (central area CA) of the topsheet 2 toward the ends can easily stay at the ends of the topsheet 2, and leakage from the ends to the outside can be suppressed.

In the present embodiment, the compression portion 12a at the end of the press section 12 and the compression section 13a at the end of the press section 13 span the outer edge in the width direction W of the end area EA (that is, , the outer edge 2E) of the surface sheet 2 is formed. Therefore, one pair of compression sections 12a in a pair of press sections 12 and one pair of compression sections 13a in a pair of press sections 13 may be referred to as a pair of end press sections. When the absorbent article 1 is used, the compressed portion 12a and the compressed portion 13a can quickly attract a part of the bodily fluid to the lower absorber 4 when the bodily fluid diffused from the central region CA reaches the end region EA. However, the compression part 12a and the compression part 13a are not limited to the ends of the press part 12 and the press part 13, and may be located in the middle of the press part 12 and the press part 13, and may be separated from the press part 12 and the press part 13. In addition, the length in the direction in which the compressed portion 12a and the compressed portion 13a extend can be 1 to 20% of the length in the direction in which the press section 12 and the press section 13 extend, preferably 2 to 10%. When the lengths of the compressed portion 12a and the compressed portion 13a are too short, the following effects are not easily produced, and when the lengths are too long, the original effects of the end region EA are not easily produced.

In this way, when the absorbent article 1 is used, part of the bodily fluid that has reached the end (end region EA) in the width direction W of the topsheet 2 can be quickly passed through the compressed portion 12a, the compressed portion 13a, and the like ground to the absorber 4 below. Thereby, in the width direction W, the bodily fluid at the end of the top sheet 2 and the bodily fluid traveling from the end to the outside can be suppressed from moving further from the end to the outside. Therefore, in this absorbent article 1, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be further suppressed.

In the present embodiment, in a plan view, in the width direction W, it is easier to confirm the color of the absorber 4 when viewed through the outer portion of the edge 2E of the top sheet 2 than when viewed through the central portion of the top sheet 2 ( Contains the color of the absorber when it absorbs bodily fluids). Thereby, by confirming the color of the absorber 4 recognized in the part outside the surface sheet 2, it can confirm whether the absorber 4 has absorbed body fluid up to the edge part in the width direction W of the absorber 4. In the present embodiment, only the auxiliary sheet 5 exists in the thickness direction T of the portion outside the surface sheet 2 . In addition, the central portion (central area CA) of the top sheet 2 is in the thickness direction T, and the top sheet 2 and the auxiliary sheet 5 are present. Therefore, the thickness of the portion outside the edge 2E of the topsheet 2 can be made relatively thin, so that the color of the absorber 4 can be easily confirmed through the portion outside the edge 2E of the topsheet 2 .

In this way, in the absorbent article 1, in a plan view, the color of the absorber 4 viewed through the outer portion (the auxiliary sheet 5) of the top sheet 2 is compared to the color of the absorber 4 viewed through the central portion of the top sheet 2 (the top sheet 2 and the auxiliary sheet 5). The color of the absorber observed by the sheet 5) is closer to the color of the actual absorber 4. Therefore, by confirming the color of the absorber 4 recognized in the part outside the surface sheet 2, it is possible to confirm whether or not the absorber 4 has absorbed body fluid up to the end portion in the width direction W of the absorber 4. As a result, it is possible to avoid a situation in which the body fluid cannot be completely absorbed by the absorber 4 and lateral leakage occurs because the time to replace the absorbent article 1 is not found until the end of the absorber 4 in the width direction W absorbs the body fluid. produce.

In particular, the core material wrapping layer 4b may be colored. Thereby, the edge of the absorber 4 can be more clearly defined, so it can be further avoided that even if the time to replace the absorbent article 1 is reached, the time to be replaced is not found, and the bodily fluid cannot be completely absorbed by the absorber 4 . And the formation of a lateral leakage situation occurred. In addition, if it is colored, the color difference between the surface sheet 2 and the core material wrapping layer 4b can be more easily seen. Therefore, it can also be used as an index of alignment in the width direction W and the longitudinal direction L at the time of wearing. . Specifically, the difference in color difference between the surface sheet 2 and the core material cladding layer 4b (as seen through the auxiliary sheet 5 ) may be ΔE3 or more.

However, the aforementioned color difference can be measured as follows. (1) Preparation: X-Rite eXact Standerd (measurement diameter: 1.5 mm) manufactured by X-Rite. (2) Change the position of the CIE L*a*b* coordinates of the part to be measured of the sample, measure 10 or more points, and calculate the average value ([L1 ^* , a1 ^* , b1 ^* ]). (3) The L ^* a ^* b ^* coordinates of the part to be compared of the sample are changed and measured at 10 or more points, and the average value ([L2*, a2 ^* , b2 ^* ]) is calculated. (4) The color difference ΔE is calculated by the following formula: ΔE={(L1 ^* -L2 ^* ) ² +(a1 ^* -a2 ^* ) ² +(b1 ^* -b2 ^* ) ² } ^0.5 .

In the present embodiment, the absorbent article 1 has a pair of low-rigidity parts with low rigidity between the center part in the width direction W and both ends in the width direction W in a plan view. Here, the center portion in the width direction W includes the surface sheet 2 , the auxiliary sheet 5 , and the absorber 4 laminated in the thickness direction T. As shown in FIG. In addition, both ends in the width direction include the side sheet 6, the auxiliary sheet 5, and the absorber 4 laminated in the thickness direction T. The part between the center part and both ends of the width direction W contains the auxiliary sheet 5 and the absorber 4 laminated|stacked in the thickness direction T. Therefore, the portion between the central portion and both end portions in the width direction W has few layers stacked in the thickness direction T and is low in rigidity, that is, a pair of low-rigidity portions. Therefore, when an absorbent article is used, it is easy to deform the absorbent article into a substantially W-shape when viewed from the longitudinal direction, starting from the pair of low-rigidity portions.

Thus, in the absorbent article 1, it becomes easy to deform|transform into a substantially W shape when seeing from a longitudinal direction with a pair of low rigidity part as a starting point. That is, the both ends (edge part area|region EA) of the width direction W of the absorbent article 1 can be raised relatively to the skin side. Thereby, the amount of bodily fluids toward the ends in the width direction W of the top sheet 2 can be reduced. Therefore, in this absorbent article 1, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be further suppressed.

In addition, the structure of the absorbent article 1 is not limited to the above-mentioned example. Fig. 3 is a cross-sectional view showing another configuration example of the absorbent article 1 of the embodiment. This figure is a cross-sectional view taken along the line II-II shown in FIG. 1 . In this configuration example, the pair of side sheets 6 is not used, and the auxiliary sheets 5 are further extended toward both outer sides in the width direction W instead of the pair of side sheets 6 . In this case, the aforementioned effects can also be obtained.

However, the structure of the absorber 4 is not limited to the above-mentioned example. For example, as another embodiment, the absorbent article 1 may have a length (width) in the width direction W of the absorber smaller than the length (width) in the width direction W of the topsheet 2 as another absorber. In this case, in a plan view, the pair of end regions EA are located on both outer sides of the width direction W of the absorber, respectively. Thereby, when the absorbent article 1 is used, when the absorbent article 1 is sandwiched between both thighs and a force toward the inner side in the width direction W is applied to the absorbent body, the opposite end of the non-joint part of the part located on the outer side of the absorbent body The upper region EA becomes easy to stand up toward the skin side. That is, the absorbent article 1 provided with such an absorber can make the both ends (edge part area|region EA) of the width direction W of the top sheet 2 stand up to the skin side relatively. Thereby, the amount of bodily fluids toward the ends in the width direction W of the top sheet 2 can be reduced. Therefore, even in such a case, even when the amount of the bodily fluid is large, the lateral leakage of the bodily fluid can be further suppressed.

However, the structure of the press section (press groove) is not limited to the above-mentioned example. For example, as another embodiment, the absorbent article 1 may further include a pair of auxiliary pressing parts (not shown in the figure) formed by pressing only the auxiliary sheet 5 on the outside of the pair of end regions EA in the width direction W in a plan view. ) as another press section (press groove). That is, in the width direction W, the auxiliary sheet 5 can be formed on the outer side of the outer edge 2E of the surface sheet 2 in a plan view. In this case, when the absorbent article 1 is used in each of the pair of auxiliary presses, even if the bodily fluid diffused from the central area CA leaks to the outside from the end area EA, the bodily fluid can be quickly sucked to the lower absorber 4 . Therefore, in this absorbent article 1, even when the amount of bodily fluids is large, lateral leakage of bodily fluids can be further suppressed.

In the present embodiment, the first fiber layer 2a contains water-retaining fibers, whereby the skin feel of the top sheet 2 can be improved. The water-retaining fiber is not particularly limited as long as it has a property of absorbing and retaining water (water-retention). As a water-retaining fiber, a cellulose fiber is mentioned, for example. In the present embodiment, cotton is used as the water-retaining fiber. The second fiber layer 2b contains hydrophobic fibers and water-retaining fibers. The hydrophobic fiber is not particularly limited as long as it is a fiber having hydrophobicity. As a hydrophobic fiber, thermoplastic resin fiber is mentioned, for example. In this embodiment, a PET/PE core-sheath type conjugate fiber is used as the hydrophobic fiber. The water-retaining fibers are the same as the water-retaining fibers of the first fiber layer 2a.

In the present embodiment, the auxiliary sheet 5 is not particularly limited as long as it is liquid-permeable, for example, liquid-permeable nonwoven fabrics, such as nonwoven fabrics of hydrophobic fibers, among these, thermoplastic resin fibers are preferably used of non-woven fabrics. In addition, when the surface sheet 2 contains water-retaining fibers such as cotton, the auxiliary sheet 5 may also contain water-retaining fibers such as cotton corresponding to it. In the absorbent article 1 having such a structure, the water-retaining fibers and the like with high liquid diffusivity are communicated to the auxiliary sheet 5 from the first fiber layer 2a of the top sheet 2 via the second fiber layer 2b. Therefore, by utilizing the liquid diffusion of the bodily fluid of these fibers, the bodily fluid can be more stably transferred from the top sheet 2 to the absorber 4 via the auxiliary sheet 5, and the skin feel of the top sheet 2 can be improved, and the skin feeling of the top sheet 2 can be improved. Improves absorption performance.

In the present embodiment, the absorbent core 4a of the absorber 4 is not particularly limited as long as it has liquid absorbing properties and liquid retaining properties, and examples thereof include liquid retaining substances containing absorbent fibers such as pulp fibers, Absorbent material such as superabsorbent polymer (SAP). The core wrapping layer 4b is not particularly limited as long as it is in a form capable of holding the absorbent core 4a, and examples thereof include a liquid-permeable sheet containing a hydrophilic nonwoven fabric such as tissue paper.

Although it does not specifically limit as a side sheet 6, For example, the nonwoven fabric which performed the water repellent process, the synthetic resin film which has air permeability, etc. are mentioned. Moreover, as the back sheet 3, it does not specifically limit, For example, a liquid-impermeable nonwoven fabric, a synthetic resin film, a composite sheet of these, etc. are mentioned. In this embodiment, the fin portion 9 is formed by the side sheet 6 and the back sheet 3 .

The thickness of the sheet member was measured by the following method. First, the sheet member was cut into a size of 10 mm×10 mm to prepare a sample. Next, on the cut surface of the sample parallel to the thickness direction T, a digital microscope (manufactured by KEYENCE CORPORATION: VHX-100) was used to capture an enlarged image from the direction perpendicular to the cut surface of the sheet member. The magnified image is an image magnified to a magnification capable of imaging the entire thickness direction T of the sheet member, and the magnification is, for example, 20 to 50 times. The thickness of the sheet member was determined in the 2D image changed from the obtained 3D image. The thickness of the sheet member of one sheet was measured at each of the three cut surfaces, and the average value of the thicknesses measured from the sheet members of 10 sheets in total was taken as the thickness of the sheet member.

In particular, when the sheet member is formed of a material that is continuous in the longitudinal direction L (for example, the surface sheet 2 ), the position of the cut surface of the imaged image can be set as follows. (1) Width direction W *For the non-joint portion (for example, the portion placed on the auxiliary sheet 5 without applying the adhesive) in the end region (for example, the end region EA), when the non-joint portion is divided into three equal parts in the width direction W, When three blocks are created, the position of the boundary between the first block and the second block is set from the outer side in the width direction W. As shown in FIG. *For the central area (for example, central area CA), the position of the central portion in the width direction W is set. (2) Length direction L * It is set to the position of 3 places of the front end, the center, and the rear end of the longitudinal direction L of the clothing fixing|fixed part 7. Furthermore, in a product without the clothing fixing portion 7, the base portion of the flap portion 9 (two at both ends in the longitudinal direction L) and the three positions of the center in the longitudinal direction L of the flap portion 9 are set. For a product without the clothing fixing portion 7 and the flap portion 9, the position of the center in the longitudinal direction L of each of the first region, the second region, and the third region that divides the product into three in the longitudinal direction L is set. When the sheet members are intermittently arranged in the longitudinal direction L, each sheet member is divided into three in the longitudinal direction L, and is set to the position of the center of each longitudinal direction L (in each sheet member, three locations). However, in each of the above-mentioned positions, the positions where the material is compressed, such as embossing, hinges, and pressing sections, are set to be intermediate positions between the embossing, etc., and the embossing, that is, the position where the material is not compressed. middle position. In addition, the position of the said cut surface is applicable to the measurement of the following fiber density.

In addition, the fiber density of the sheet member was measured in the following manner. First, the sheet member was cut into a size of 10 mm×10 mm to prepare a sample. Next, using a scanning electron microscope (manufactured by JEOL Ltd.: JCM-5100), the cut surface parallel to the thickness direction T of the sample was observed on an enlarged scale. The magnified image is an image magnified to a magnification such that a cross section of 30 to 60 fibers can be imaged, and the magnification is, for example, 150 to 500 times. In the 2D image which was changed from the obtained 3D image, the number of cross sections of the fiber was determined. That is, in the cut surface of a predetermined area, the number of the cross section of the cut fiber is counted. The number of cross sections of the obtained fibers was converted into the number of cross sections of fibers per 1 mm ² , and this was taken as the fiber density (pieces/mm ² ). The measurement was performed at three locations, and the average value of the measured values was used as the fiber density of the sample. That is, the density of the number of fibers is used as the fiber density. In other words, the number of fibers per unit area of the cross section parallel to the thickness direction T is used as the fiber density. In addition, as the fiber density, the number of fibers per unit volume can also be used. The number of fibers per unit volume can be obtained, for example, by X-ray CT analysis. The fiber density per unit area and the fiber density per unit volume have different numerical values, but the relative comparison (for example, size comparison) of the fiber density between the fiber layers is the same.

In addition, the mass density of the sheet member was measured in the following manner. First, regarding the basis weight of the sheet, the sheet was cut into a size of 5 cm×5 cm as a sample, and after drying treatment in an environment of 100° C. or higher, the mass was measured. The measured mass was divided by the area of the sample to calculate the basis weight of the sample. The value obtained by averaging the basis weights of 10 samples was set as the basis weight of the sheet. Next, regarding the thickness of the sheet, each sample was measured under the condition of a measurement load of 3 g/cm ² using a thickness gauge equipped with a measuring piece of 15 cm ² (manufactured by Daiei Chemical Seiki Co., Ltd.: type FS-60DS). thickness of. Three thicknesses were measured for one sample, and the average value of the three thicknesses was set as the thickness of each sample. Then, the mass density of the sheet was calculated by dividing the basis weight of each sample of the sheet obtained by the method described above by the thickness of each sample of the sheet obtained by the method described above.

The absorbent article of the present invention is not limited to the above-described embodiments, and can be appropriately combined, changed, and the like within a range that does not depart from the object and technical idea of the present invention.

1: absorbent article 2: surface sheet 2E: edge 3: back sheet 4: absorber 5: auxiliary sheet 5E: edge 6: side sheet 9: flap part 11, 14: press part 12, 13: press part 13a: Compression part 12a: Compression part 15: Press part 16 (FA): Leak-proof wall 16E1: Fixed end 16E2: Free end 17: Boundary line A _B : Length direction rear area A _C : Length direction central area _AF : Length Forward direction area _CL : Longitudinal direction center line _CW : Width direction center line CA: Central area EA: End area XA: Drain port contact area L: Longitudinal direction W: Width direction

1 is a plan view showing a configuration example of the absorbent article of the embodiment. [Fig. 2] is a cross-sectional view taken along line II-II of Fig. 1. [Fig. It is sectional drawing which shows another structural example of the absorbent article of embodiment.

1: absorbent articles

2: Surface flakes

3: back sheet

2E: end edge

4: Absorber

5: Auxiliary sheet

5E: Edge

6: side flakes

9: fins

11,14: Press section

12,13: Press section

13a: Compression part

12a: Compression part

15: Press section

16(FA): Leak-proof wall

16E1: Fixed end

16E2: Free end

17: Boundary Line

A _B : The rear area in the longitudinal direction

A _C : Central area in the longitudinal direction

A _F : Front area in the longitudinal direction

C _L : Center line in the longitudinal direction

C _W : Center line in width direction

CA: Central Area

EA: End Zone

XA: Exhaust port contact area

L: length direction

W: width direction

Claims (11)

An absorbent article, which has a length direction, a width direction and a thickness direction, and includes a surface sheet, an absorber, and an auxiliary sheet located between the surface sheet and the absorber, and is characterized by: In the width direction, the length of the auxiliary sheet is longer than the length of the cover sheet, and both ends of the auxiliary sheet extend toward the outer sides of the two end edges of the cover sheet, respectively, The aforementioned surface flakes include: The central area located at the central portion in the width direction; and a pair of end regions located at both ends in the width direction and adjacent to the both outer sides of the central region in the width direction, The length in the thickness direction of each of the pair of end regions is larger than the length in the thickness direction of the center region. The absorbent article according to claim 1, wherein the fiber density of each of the pair of end regions is lower than the fiber density of the center region. The absorbent article according to claim 1 or 2, wherein the fiber density on the skin side of each of the pair of end regions is higher than the fiber density on the non-skin side. The absorbent article according to any one of claims 1 to 3, further comprising a pair of pressing portions formed by pressing the surface sheet, the auxiliary sheet, and the absorber, extending along the longitudinal direction, and Arranged at intervals in the aforementioned width direction, The edge of the outer side in the width direction of each of the pair of end regions is the outer side in the width direction of each of the pair of compression portions. The absorbent article according to any one of claims 1 to 4, wherein each of the pair of end regions is not joined to the auxiliary sheet. The absorbent article according to claim 5, wherein the length in the width direction of the absorber is smaller than the length in the width direction of the topsheet, In a plan view, the pair of end regions are located on both outer sides of the absorber in the width direction, respectively. The absorbent article according to claim 5 or 6, further comprising a pair of end presses that press the surface sheet, the auxiliary sheet, and the absorber so as to span the width direction of the pair of end regions. Formed in the manner of the outer edge. The absorbent article according to any one of Claims 1 to 7, further comprising a pair of auxiliary press portions, which are formed by pressing only the auxiliary sheets, on the outside of the pair of end regions in the width direction in a plan view. formed by pressing. The absorbent article according to any one of claims 1 to 8, wherein the mass density of the surface sheet is lower than the mass density of the auxiliary sheet. The absorbent article according to any one of claims 1 to 9, wherein, in the width direction, in the width direction, the top sheet is passed through the outer portion of the edge of the top sheet than when viewed through the central portion of the top sheet. It is easier to confirm the color of the aforementioned absorber by viewing. The absorbent article according to any one of claims 1 to 10, further comprising a pair of side sheets joined to both ends of the auxiliary sheet in the width direction and extending along the longitudinal direction, In a plan view, a pair of low-rigidity portions having low rigidity are provided between the center portion in the width direction and both end portions in the width direction.

Images