TWI788893B - absorbent article - Google Patents

Abstract

It is an object of the present invention to provide an absorbent article which can suppress leakage of body fluid from end portions in the width direction, that is, lateral leakage, and improve skin feel even when the amount of body fluid is large. In the absorbent article (1), the length of the auxiliary sheet (5) located between the surface sheet (2) and the absorbent body (4) in the width direction is larger than the length of the surface sheet, and the two ends of the auxiliary sheet The straps extend toward the respective outer sides of the two end edges of the surface sheet. The surface sheet includes: a central area (CA) located at the center in the width direction; and a pair of end areas (EA) located at both ends in the width direction and adjacent to both outer sides in the width direction of the central area. The respective lengths of the pair of end regions in the thickness direction are larger than the length of the central region in the thickness direction.

Description

absorbent article

The present invention relates to absorbent articles.

Absorbent articles that prevent excreted body fluids such as menstrual blood from leaking are well known. For example, Patent Document 1 discloses an absorbent article capable of improving retention of bodily fluids. This absorbent article is a liquid-permeable top sheet on the skin-contacting side of the top sheet. The upper sheet is arranged along the longitudinal direction at the central portion in the width direction, and has a central region including the excretory port abutting region. The absorbent article includes: an upper layer press section that compresses the top sheet and the upper sheet in the thickness direction; and an absorber press section that compresses the top sheet and the absorber in the thickness direction. The absorbent body pressing portion has a longitudinal pressing portion formed along the longitudinal direction on the outer side in the width direction than the upper sheet. [Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Unexamined Patent Publication No. 2012-239712

[Problem to be solved by the invention]

In the absorbent article of Patent Document 1, both ends in the width direction of the top sheet are not joined to the surface sheet, and the thickness at both ends in the width direction of the upper sheet is the same as or thinner than that in the center. Therefore, the amount of bodily fluid that can be held in the interstices between the fibers constituting the upper sheet is smaller at both ends in the width direction of the upper sheet than at the center. As a result, when the absorbent article is used, when the amount of bodily fluid is large, bodily fluid diffused from the center of the upper sheet toward the ends in the width direction may overflow from the ends without remaining on 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 body fluid toward the both sides in the length direction sufficiently proceeds, the diffusion of the body fluid toward the ends in the width direction advances first, and the body fluid diffuses from the width direction. There is a risk of leakage from the end of the direction to the outside. In addition, since the upper sheet with high water retention is located closer to the skin than the surface sheet, if the upper sheet that retains bodily fluids abuts against the excretory opening, there is a possibility that the feeling on the skin will be deteriorated.

It is an object of the present invention to provide an absorbent article which can suppress leakage of body fluid from end portions in the width direction, that is, lateral leakage, and improve skin feel even when the amount of body fluid is large. [Technical means to solve the problem]

The absorbent article of the present invention is as follows. (1) An absorbent article having a length 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 aforementioned width direction, the length of the aforementioned auxiliary sheet is larger than the length of the aforementioned surface sheet, Both ends of the auxiliary sheet are respectively extended toward the outer sides of the two ends of the surface sheet, The foregoing surface flakes comprise: the central area located in 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 two outer sides in the width direction of the central region, The respective lengths of the pair of end regions in the thickness direction are larger than the length of the central region in the thickness direction. [Invention effect]

According to the present invention, even when the amount of bodily fluid is large, it is possible to provide an absorbent article capable of suppressing leakage of bodily fluid from end portions in the width direction, that is, lateral leakage, and improving skin feel.

This embodiment discloses the following aspects. [Form 1] An absorbent article has a length direction, a width direction, and a thickness direction, and includes a surface sheet, an absorber, and an auxiliary sheet positioned between the surface sheet and the absorber, and is characterized by: In the aforementioned width direction, the length of the aforementioned auxiliary sheet is larger than the length of the aforementioned surface sheet, Both ends of the auxiliary sheet are respectively extended toward the outer sides of the two ends of the surface sheet, The foregoing surface flakes comprise: the central area located in 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 two outer sides in the width direction of the central region, The respective lengths of the pair of end regions in the thickness direction are larger than the length of the central region in the thickness direction.

In this absorbent article, the surface sheet is formed such that the respective thicknesses of the pair of end regions are larger than the thickness of the central region in the width direction. That is, in the surface sheet, the thickness of both end portions in the width direction is greater than the thickness of the central portion. Therefore, the both ends in the width direction of the surface sheet can hold more bodily fluids in the gaps between the fibers constituting the surface sheet than the central portion, and can function as embankments protruding toward the skin side. As a result, when an absorbent article is used, even if there is a large amount of bodily fluid (such as menstrual blood), bodily fluid that diffuses from the center of the top sheet toward the ends and passes through the inside or surface of the top sheet tends to gather on the top sheet. The end portion can be suppressed from leaking out from the end portion. In addition, since both ends in the width direction of the surface sheet are thick and the central part is thin, the abutment of the central part to the excretory opening can be weakened and the skin feel can be improved. In this manner, in the present absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be suppressed, and skin feel can be improved.

[Form 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 central region. In this absorbent article, the surface sheet is formed such that the respective fiber densities of the pair of end regions become lower than that of the central region. That is, in the surface sheet, the fiber density at both ends in the width direction is lower than that at the center. Therefore, even if a large amount of body 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 body fluid can hardly diffuse toward the end portion. In addition, since the fiber density at both ends in the width direction of the surface sheet is relatively low, a soft touch can be imparted. In this manner, in the present absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed, and skin feel can be further improved.

[Form 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 of each of the pair of end regions on the skin side becomes higher than the fiber density on the non-skin side. That is, in the surface sheet, the fiber density on the skin side is higher than that on the non-skin side at both ends in the width direction. Therefore, it is possible to prevent bodily fluids diffused from the center of the top sheet toward the ends from migrating toward the non-skin side of the end, and making it difficult to migrate toward the surface of the auxiliary sheet located below the end in the thickness direction. Thereby, bodily fluids reaching the ends stay at the ends and are less likely to migrate in the width direction. Therefore, other bodily fluids can easily migrate downward in the thickness direction from the central portion, that is, toward the absorber. In this manner, in the present absorbent article, even when the amount of bodily fluid is large, movement of 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 absorbent body and extending along the longitudinal direction, and arranged at intervals in the aforementioned width direction, The outer edge in the width direction of each of the pair of end regions is the outer side of the width direction of each of the pair of compression parts. In this absorbent article, the outer edges of the pair of end regions in the width direction are positioned outside the width direction of the pair of compressed portions. Thereby, when the absorbent article is used, the part of the absorbent article outside the pair of compressed parts is deformed toward the skin side starting from the pair of compressed parts. Portions of the pair of outer end regions are similarly deformed toward the skin side. That is, both ends in the width direction of the surface sheet are deformed toward the skin side. Therefore, the both ends of the width direction of the surface sheet can be made to function like embankments protruding toward the skin side, whereby the body fluid diffused from the central portion of the surface sheet to the ends can be retained at the ends of the surface sheet, which can The leakage from the end to the outside is suppressed.

[Aspect 5] The absorbent article according to any one of aspects 1 to 4, wherein each of the pair of end regions is not joined to the auxiliary sheet. In this absorbent article, the surface sheet is formed so that each of the 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, it is possible to prevent bodily fluid diffused from the central portion toward the end of the surface sheet from migrating toward the auxiliary sheet located on the outer side in the width direction than the end. In addition, since both ends in the width direction of the top sheet are not bonded to other materials and have a high degree of freedom, the followability to the skin surface at both ends can be improved. In this manner, in the present absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed, and skin feel can be further improved.

[Form 6] The absorbent article according to aspect 5, wherein the length of the absorbent body in the width direction is smaller than the length of the top sheet in the width direction, In a plan view, the pair of end regions are respectively located on both outer sides of the absorber in the width direction. In the width direction of the absorbent article, the length of the absorber is shorter than that of the surface sheet, and a pair of end regions are located on both outer sides of the absorber in plan view. Therefore, when the absorbent article is used, when the absorbent article is sandwiched between the two thighs and a force is applied to the absorbent body toward the inner side in the width direction, the non-joined pair of end regions of the portion located on the outer side of the absorbent body becomes It is easy to stand up toward the skin side. That is, both ends in the width direction of the top sheet can be raised toward the skin side facing each other. Thereby, the amount of bodily fluid toward the end in the width direction of the surface sheet can be reduced. Therefore, in the present absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed.

[Aspect 7] The absorbent article according to Aspect 5 or 6, further comprising a pair of end pressing portions for pressing the surface sheet, the auxiliary sheet, and the absorbent body so as to span the width direction of the pair of end regions. Formed in the way of the outer edge. This absorbent article is provided with a pair of end part pressing part, and is formed so that it may straddle the outer edge of the width direction of each pair of end part regions. That is, the edge pressing portion is formed so as to straddle the outer edge in the width direction of the surface sheet. Therefore, when using an absorbent article, when body fluid diffused from the central portion of the top sheet reaches the ends, a part of the body fluid can be sucked into the absorbent body below the top sheet and the auxiliary sheet through the end pressing portion. Thereby, bodily fluid at the end in the width direction of the surface sheet can be suppressed from migrating outward from the end and further migrating outward. Therefore, in the present absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed.

[Aspect 8] The absorbent article according to any one of aspects 1 to 7, wherein, in a plan view, on the outside of the pair of end regions in the width direction, a pair of auxiliary pressing parts are further provided, which are only the auxiliary pressing parts. Sheets are pressed and formed. This absorbent article further includes a pair of auxiliary pressing portions for pressing 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 portion is formed on the auxiliary sheet outside the outer edge of the surface sheet. Therefore, when using an absorbent article, even if bodily fluid diffused from the central portion of the surface sheet leaks outward from the end, the bodily fluid can be sucked into the absorbent body below the auxiliary sheet through the auxiliary pressing portion. Therefore, in the present absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed.

[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 the present absorbent article, the mass density of the surface sheet is lower than that of the auxiliary sheet. Therefore, even when the amount of bodily fluid is large when the absorbent article is used, 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, the amount of bodily fluids migrating to the ends in the width direction of the top sheet can be reduced. Therefore, in the present absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed.

[Aspect 10] The absorbent article according to any one of aspects 1 to 9, wherein, in a plan view, in the width direction, when viewed through the center of the surface sheet, the edge of the surface sheet is more outside. Partial viewing makes it easier to confirm the color of the aforementioned absorber. In this absorbent article, it is easier to confirm the color of the absorber (including the color of the absorber when it absorbs body fluids) when viewed through the outer portion of the edge of the surface sheet than through the central portion of the surface sheet when viewed from a plan view. s color). That is, the color of the absorber viewed through the outer part (auxiliary sheet) of the surface sheet is closer to the actual color than the color of the absorber viewed through the central part of the surface sheet (surface sheet and auxiliary sheet). The color of the absorber. Here, in 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 checking the color of the absorber recognized on the outside of the surface sheet, it is possible to check whether or not there is absorbed body fluid up to the end of the absorber in the width direction. Thereby, it is possible to avoid a situation in which body fluids cannot be completely absorbed by the absorber and cause lateral leakage due to absorption of body fluids until the end of the width direction of the absorbent body has not been found to replace the absorbent article.

[Form 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, A pair of low-rigidity parts with low rigidity are provided between the central part in the width direction and both end parts in the width direction in a plan view. This absorbent article has a low-rigidity section between the central portion (surface sheet, auxiliary sheet, and absorbent body) in the width direction and both ends (side sheets, auxiliary sheets, and absorbent body) in the width direction when viewed from above. For low rigidity parts (auxiliary sheet and absorber). Therefore, when the 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, both ends in the width direction of the absorbent article can be raised toward the skin side facing each other. Thereby, the amount of bodily fluid toward the end in the width direction of the surface sheet can be reduced. Therefore, in the present absorbent article, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed.

Next, embodiments of the absorbent article of the present invention will be described.

The absorbent article of the embodiment will be described taking a sanitary napkin as an example. However, the kind and use 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 scope of the technical idea of the present invention. As other absorbent articles, pantiliners, light incontinence pads, disposable paper diapers, etc. are mentioned, for example.

Fig. 1 and Fig. 2 are diagrams showing a configuration example of an absorbent article 1 according to an embodiment. Fig. 1 is a plan view of the state where the absorbent article 1 has been unfolded, and Fig. 2 is a cross-sectional view along line II-II of Fig. 1 . The absorbent article 1 has a longitudinal direction L, a width direction W and a thickness direction T which are perpendicular to each other. In the absorbent article 1 shown in FIG. 1 , the upper side and the lower side in the figure are respectively regarded as the front side and the rear side in the longitudinal direction L, and the left side and the right side are respectively regarded as the left side and the right side in the width direction W. and the deep side are defined as the upper side and the lower side in the thickness direction T, respectively. The absorbent article 1 has: a longitudinal centerline _CL (imaginary line) passing through the center in the widthwise direction W and extending toward the longitudinal direction L; and a widthwise centerline C passing through the center in the longitudinal direction L and extending toward the widthwise direction W. _W (imaginary line). The orientation and side toward the center line _CL in the longitudinal direction are respectively regarded as the inner orientation and the inner side of the width direction W, and the orientation and sides farther away are regarded as the outer orientation and the outer side of the width direction W, respectively. In addition, the azimuth and side toward the center line C _W in the width direction are defined as the inner orientation and the inner side of the longitudinal direction L, respectively, and the azimuths and sides away from the lengthwise direction L are respectively defined as the outer orientation and outer side of the longitudinal direction L. In addition, the absorbent article 1 placed on a plane including the longitudinal direction L and the width direction W viewed from the upper side in the thickness direction T is called a plan view angle, and the shape grasped by the plan view view angle is called a planar shape. Arbitrary directions in a plane including the longitudinal direction L and the width direction W are referred to as planar directions. When the absorbent article 1 is already worn by the wearer, the sides relatively close to and away from the wearer's skin surface in the thickness direction T are referred to as the skin side and the non-skin side, respectively. These definitions are also commonly used for each material of 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 when viewed from above, and both ends in the longitudinal direction L have Slightly semicircular in 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 ellipse, a gourd shape, and an hourglass clock shape. The absorbent article 1 is equipped with a pair of flap part 9 extended toward the both outer sides of the width direction W from the part of a substantially rectangular shape. 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 a top sheet 2, an auxiliary sheet 5, and an absorber 4, and in this embodiment, a back sheet 3 and a clothing fixing portion 7 are also provided. The top sheet 2 is a liquid-permeable sheet, and constitutes the skin-side surface of the absorbent article 1 in the present 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 material with liquid absorption and liquid retention properties, and is located between the surface sheet 2 (and the auxiliary sheet 5 ) and the back sheet 3 . The back sheet 3 is a liquid-impermeable sheet, and constitutes the non-skin side surface of the absorbent article 1 in the present embodiment. The clothing fixing portion 7 is an adhesive for bonding 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 stacked in this order in the thickness direction T. Furthermore, the absorbent article 1 may further include an exterior sheet on the non-skin side of the back sheet 3 .

In this 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 includes a pair of leak-proof walls 16 extending along the longitudinal direction L on the inner side in the width direction W. 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 joined to the auxiliary sheet 5 and their inner ends as free ends 16E2 and are not joined to members. 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 edge 2E of the width direction W of the surface sheet 2 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 that 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 parts 8 are adhesives for joining the pair of wing parts 9 to the non-skin side of the underwear. In this embodiment, they are located on the non-skin side surface of the back sheet 3 of the pair of wing parts 9 .

In this embodiment, the surface sheet 2 has a substantially rectangular shape that is 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 surface 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 is the skin-side surface constituting the surface sheet 2, and the non-skin-side surface is in contact with the skin-side surface of the second fiber layer 2b. The non-skin side surface of the second fiber layer 2b constitutes the non-skin side surface of the surface 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 including other fiber layers. Also, the types of fibers constituting each of the first fiber layer 2a and the second fiber layer 2b are not limited to the aforementioned examples as long as the surface sheet 2 can be a liquid-permeable sheet.

The auxiliary sheet 5 has a substantially rectangular shape that is 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 slightly larger shape in the width direction W than the surface sheet 2 . Therefore, the length (width) of the auxiliary sheet 5 in the width direction W is larger than the length (width) of the surface sheet 2 in the width direction W. Also, in a plan view, both ends of the auxiliary sheet 5 in the width direction W extend outwards of the respective ends 2E of the width direction W of the surface sheet 2 . Therefore, both end edges 5E of the auxiliary sheet 5 in the width direction W are positioned outside of both end edges 2E of the width direction W of the surface sheet 2 . In this embodiment, the length (width) of the width direction W of the auxiliary sheet 5 is substantially the same as the length (width) of 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 with an adhesive (not shown, for example: hot-melt adhesive). The adhesive extends along the length 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. Examples of the predetermined pattern include a stripe shape, a repeated shape of omega, and a repeated shape of waves. The adhesive is applied to an area approximately symmetrical to the centerline _CL in the longitudinal direction.

The surface sheet 2 includes (divides) a central area CA located in the center of the width direction W; and a pair of end areas located at both ends of the width direction W and adjacent to both outer sides of the width direction W of the central area CA. EA. The range in the width direction W of the pair of end regions EA of the surface sheet 2 does not include the remainder of the central region CA. In the present embodiment, the central area CA and the pair of end areas EA are separated by a pair of imaginary boundary lines 17 extending along the longitudinal direction L, respectively.

In this embodiment, the central area CA is the area where the adhesive is applied in the aforementioned predetermined pattern, and the pair of end areas EA are adjacent to both outer sides of the central area CA in the width direction W without adhesive application. That is, the central region CA is a region joined to the auxiliary sheet 5 , and the pair of end regions EA are regions not joined to the auxiliary sheet 5 . Therefore, the pair of boundary lines 17 respectively show the outer edge of the region where the adhesive exists in the width direction W. At this time, the pair of end regions EA respectively connects the inner edge in the width direction W and the end edge of the central region CA as fixed ends, and makes the outer edge in the width direction W (not including both ends in the longitudinal direction L) end) is not joined to any member and acts as a free end. That is to say, the pair of end regions EA is a structure in which a gap V can be generated between the free ends of the auxiliary sheet 5 in the thickness direction T, and a gap V can be generated between them. The structure standing up from the auxiliary sheet 5. Furthermore, the end area EA may be partially joined to the auxiliary sheet 5, the side sheet 6, and the like.

Also, 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 end area|region EA may mutually join the 1st fiber layer 2a and the 2nd fiber layer 2b, respectively.

In this embodiment, both the central area CA and the pair of end areas EA are line-symmetric with respect to the longitudinal centerline _CL . In the width direction W, the range of the central region CA of the surface sheet 2 is, for example, a range of 80 to 96% of the length of the surface sheet 2 . If it is less than 80%, the length in the width direction W of the end region EA may become long, and may be rolled up. In this way, the wearer tends to feel uncomfortable at the rolled-up portion. And, a gap is formed between the topsheet 2 and the wearer's skin surface in the vicinity of the rolled-up portion, so that bodily fluids tend to leak along the wearer's skin surface. If it exceeds 96%, the bonding between the central region CA and the auxiliary sheet 5 makes it easier for the end region EA to adhere closely to the auxiliary sheet 5 , making it difficult to move and stand up from the auxiliary sheet 5 .

The length (thickness) d2 in the thickness direction T 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 can hold a larger amount of body fluid in the gaps between the constituent fibers of the surface sheet 2 than the central region CA, and can function like an embankment protruding toward the skin side in the thickness direction T. .

In the present embodiment, the central area CA is coated with an adhesive, and is pressed against the auxiliary sheet 5 in a state where it spreads in the thickness direction T, and bonded. 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 where no adhesive is applied. Therefore, the thickness of the end region EA is almost the same as that before bonding. Thus, 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 other embodiments, the central area CA is formed by one layer of the sheet member of the surface sheet 2, and a pair of end regions EA are each formed by the sheet member of the surface sheet 2 facing inward in the width direction W, toward the skin side in the thickness direction T or It is not formed by folding the skin sideways. Thus, the length (thickness) d1 of the central area CA in the thickness direction T becomes the thickness of one layer of the sheet member of the surface sheet 2, and the length (thickness) d2 of each of the pair of end regions EA in the thickness direction T becomes the surface sheet. 2, the thickness of the two-layer sheet member is formed such 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 bond each other, the thickness of the central region CA is relatively thinner than before bonding. In addition, when the first fiber layer 2 a and the second fiber layer 2 b are laminated without applying an adhesive in each pair of end regions EA, the thickness of the end region EA is almost the same as that before joining. Therefore, in such 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.

Furthermore, the method of making the length d2 in the thickness direction T of the end region EA larger than the length d1 in the thickness direction T of the central region CA is not limited to the aforementioned example. As this method, for example, the method of arranging another nonwoven fabric sheet between each of the pair of end regions EA and the auxiliary sheet 5, and the method of disposing the nonwoven fabric sheet between the first fiber layer 2a and the second fiber layer 2b of the pair of end regions EA Methods of disposing other nonwoven sheets, etc.

In this absorbent article 1, the surface sheet 2 is formed in the width direction W so that each thickness of a pair of end area|region EA is larger than the thickness of the center area|region CA. That is, in the surface sheet 2, the thickness of both ends (end area EA) in the width direction W is larger than the thickness of the center (central area CA). Therefore, the both ends of the width direction W of the surface sheet 2 can hold a larger amount of bodily fluid in the gaps between the fibers constituting the surface sheet 2 than the central portion, and can function as a dike protruding toward the skin side. . As a result, when the absorbent article 1 is used, even if the amount of bodily fluid (such as menstrual blood) is large, the bodily fluid that diffuses from the center of the top sheet 2 toward the ends and passes through the inside or surface of the top sheet 2 tends to gather. At the end of the surface sheet 2, leakage from the end to the outside can be suppressed. In addition, since both ends in the width direction W of the surface sheet 2 are thick and the central portion is thin, the abutment of the central portion toward the excretory opening can be weakened and the skin feel can be improved. In this way, in the absorbent article 1, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be suppressed, and skin feel can be improved.

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

In this embodiment, each fiber density of a pair of end area|region EA is lower than the fiber density of center area|region CA. Therefore, the bodily fluid that spreads from the central area CA to the end area EA in the width direction W can be prevented from spreading further forward in the end area EA. In this embodiment, the end area EA and the central area CA are the end and center of the same surface sheet 2, and the length (thickness) d2 of the end area EA is greater than the length (thickness) d1 of the central area CA. Therefore, the fiber density of the end area EA can be made lower than the fiber density of the center area CA.

Thus, in the absorbent article 1, the fiber density of both ends (end area|region EA) of the width direction W is lower than the fiber density of a center part (central area|region CA) of the surface sheet 2 in the absorbent article 1. As shown in FIG. Therefore, even if a large amount of body fluid flows in the width direction W inside the surface sheet 2 due to capillary action, the fiber density at the end portion is relatively low, so the body fluid can hardly diffuse toward the end portion. Also, since the fiber density at both ends in the width direction W of the surface sheet 2 is relatively low, elastic force can be imparted to both ends, thereby imparting a soft touch. In this way, in the absorbent article 1, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed, and skin feel can be further improved.

In this 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 bodily fluid diffused from the central area CA to the end area EA can be prevented from migrating to the non-skin surface side of the end area EA. In this embodiment, among the first fiber layer 2a and the second fiber layer 2b constituting the surface sheet 2, the fiber density of the first fiber layer 2a on the skin side is made 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 end 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 one layer, when the fibers are deposited on a belt-shaped mesh to manufacture the surface sheet 2, the fiber density on the side that is in contact with the mesh is higher than the fiber density on the side that is not in contact with the mesh. For one thing, the surface on the skin side of the surface sheet 2 can be used as the surface in contact with the mesh.

Thus, 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 bodily fluid diffused from the central portion (central area CA) of the top sheet 2 toward the end portion can be prevented from migrating toward the non-skin surface side of the end portion, and can be prevented from moving toward the thickness direction T located at the end portion. The surface of the lower side auxiliary sheet 5 moves. Thereby, the bodily fluids that reach the ends stay at the ends and are less likely to migrate in the width direction W, so that other bodily fluids can easily migrate downward in the thickness direction T from the center, that is, toward the absorber 4 . In this way, in the absorbent article 1, even when the amount of bodily fluid is large, migration 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 using an absorbent article, it is possible to easily move from the surface sheet 2 with a low mass density to the auxiliary sheet with a high mass density before most of the bodily fluid excreted in the central area CA travels in the width direction W to the end area EA. 5. Move to the thickness direction T. Thereby, the amount of bodily fluid migrating to the end (end region EA) of the width direction W of the top sheet 2 can be reduced. Therefore, in the present absorbent article 1, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed.

In this embodiment, the absorber 4 has a substantially rectangular shape long in the longitudinal direction L in plan view, and both ends of the longitudinal direction L are substantially semicircular in shape. The absorbent body 4 includes an absorbent core material 4a; and a core material wrapping layer 4b that wraps the absorbent core material. The length (width) of the width direction W of the absorber 4 is larger than the length (width) of the width direction W of the surface sheet 2 . Therefore, a pair of end part area|region EA is respectively located in the inner side with respect to the both ends of the width direction W of the absorber 4 at a planar view angle. Thereby, even if bodily fluid leaks laterally in the width direction W from each of the pair of end regions EA, it can be absorbed by the absorber 4, so that the final lateral leakage can be suppressed.

In the present embodiment, 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 absorber 4 on the skin side are mutually bonded with a predetermined pattern of adhesive (for example: hot melt adhesive). Adhesive) joint. Auxiliary sheet 5, a pair of side sheets 6, and the non-skin side of the absorber 4 facing the back sheet 3 are bonded to the back with a predetermined pattern of adhesive (for example: hot-melt adhesive), heat sealing, etc. flakes3.

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

In the present embodiment, the absorbent article 1 has, in the longitudinal direction L, the longitudinal front region A _F , the longitudinal center region A _C , and the longitudinal rear region A _B . The central area A _C in the longitudinal direction includes the excretory port abutting area XA. The longitudinal front region _AF is adjacent to the longitudinal direction front of the longitudinal central region A _C and includes the front end of the excretory opening abutting region XA in the longitudinal direction L. The longitudinal rear area _AB is adjacent to the rear of the longitudinal central area A _C in the longitudinal direction L, and includes the rear end in the longitudinal direction L of the excretory opening abutting area XA.

In the present embodiment, the absorbent article 1 has a plurality of holes in at least the excretion opening contact area XA of the central area CA. Examples of the plurality of hole portions include a plurality of dot-shaped (circular) pressing portions 15 formed by pressing the surface sheet 2, the auxiliary sheet 5, and the absorber 4 in the thickness direction T, for example. However, the hole portion is not limited to this example, and other structures can also be mentioned, for example, a hole (through hole) penetrating from the surface sheet 2 to the absorber 4, fibers intentionally generated when the surface sheet 2 is formed by entanglement of fibers The hole (void hole) generated by the block, etc. Furthermore, in this embodiment, the shape of the pressing part 15 in plan view is circular, but it may also be in other shapes, such as polygonal, elliptical, star, line, etc.

In this embodiment, the absorbent article 1 further includes: a pair of squeeze parts (press grooves) 12 ; a pair of squeeze parts (press grooves) 13 ; and squeeze parts (press grooves) 11 and 14 . The pair of squeezing parts 12 are arranged at intervals on both outer sides in the width direction W of the discharge port abutting area XA in plan view, and extend continuously or intermittently along the length direction L. The pair of squeeze parts 13 are arranged at intervals in the width direction W at the rear portion of the pair of squeeze parts 12 in the longitudinal direction L in a plan view, and extend continuously or intermittently along the length direction L. The squeezing parts 11 and 14 are located in front and rear of the longitudinal direction L of the excretion port abutting area XA, respectively, in plan view. The pressing parts 11 to 14 are formed by compressing the surface sheet 2, the auxiliary sheet 5, and the absorber 4 (the skin-side core wrapping layer 4b and the absorbent core 4a) in the thickness direction T. FIG. The bottoms of the pressing parts 11-14 in the thickness direction T are located in the absorbent core 4a, but may also reach the core wrapping layer 4b on the non-skin side. In this embodiment, the shape of the pressing parts 11-14 is linear in plan view, but they can also be in other shapes, for example, polygonal, circular, elliptical, star-shaped, characters or character strings, etc., can also be respective collections. Moreover, at least one of the press parts 11-14 may not be provided.

In this embodiment, the outer edges of the pair of end regions EA in the width direction W (that is, the outer edges 2E of the surface sheet 2 ) are located in each of the pair of press parts 12 or a pair of press parts. The outer side of the width direction W of each part 13. However, the compressed portion 12a located at the end in the longitudinal direction L in the press section 12 and the compressed section 13a located at the end in the longitudinal direction L in the press section 13 are not included. Thus, when the absorbent article 1 is used, the part of the absorbent article 1 outside the width direction W of the pair of pressing parts 12 (excluding the compressed part 12a) is directed toward the skin side from the pair of pressing parts 12 as a starting point. Along with the deformation, the portion of the pair of end regions EA outside the width direction W of the pair of press parts 12 of the top sheet 2 can also be deformed toward the skin side in the same way. The same applies to the portion outside the width direction W of the pair of pressing portions 13 (excluding the compressed portion 13 a ) of the absorbent article 1 .

In this manner, in the absorbent article 1, the portion of the pair of end regions EA outside the pair of press portions 12 (, 13) in the width direction W of the top sheet 2 can be deformed so as to stand up toward the skin side. Therefore, both ends in the width direction W of the top sheet 2 can be made to function like embankments protruding toward the skin side. Thereby, in the width direction W, bodily fluid diffused from the center portion (central region CA) of the top sheet 2 toward the ends can easily stay at the ends of the top sheet 2, and leakage from the ends toward the outside can be suppressed.

In the present embodiment, the compressed portion 12a located at the end of the press section 12 and the compressed section 13a located at the end of the press section 13 are designed to straddle the outer edge of the end area EA in the width direction W (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. Compression portion 12a and compression portion 13a are designed to quickly suck a part of bodily fluid diffused from central area CA to end area EA when using absorbent article 1 to absorber 4 below. But compression part 12a, compression part 13a, system is not limited to the end of press part 12, press part 13, also can be positioned at the way of press part 12, press part 13, also can be separated from press part 12, press part 13. Also, the length in the extending direction of the compressed portion 12a and the compressed portion 13a is 1 to 20%, preferably 2 to 10%, of the length in the extending direction of the squeezing portion 12 and the squeezing portion 13. If the length of the compressed portion 12a and the compressed portion 13a is too short, the following effects will not be produced easily, and if the length is too long, the original effect of the end region EA will not be produced easily.

In this way, when the absorbent article 1 is used, a part of the bodily fluid that has reached the end (end region EA) in the width direction W of the top sheet 2 can be quickly passed through the compressed portion 12a, the compressed portion 13a, etc. It is attracted to the absorbent body 4 below. Thereby, in the width direction W, the bodily fluid at the end of the top sheet 2 and the bodily fluid that migrates outward from the end can be suppressed from further migrating outward from the end. Therefore, in the present absorbent article 1, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed.

In the present embodiment, it is easier to confirm the color ( Including the color of the absorber when the body fluid is absorbed). Thereby, by checking the color of the absorber 4 recognized on the outside of the surface sheet 2, it is possible to confirm whether or not there is absorbed body fluid up to the end of the width direction W of the absorber 4. In this embodiment, only the auxiliary sheet 5 exists in the thickness direction T in the portion outside the surface sheet 2 . In addition, the surface sheet 2 and the auxiliary sheet 5 are present in the thickness direction T in the central portion (central area CA) of the surface sheet 2 . Therefore, the thickness of the portion outside the edge 2E of the surface sheet 2 can be made relatively thin, so the color of the absorber 4 can be easily confirmed through the portion outside the edge 2E of the surface sheet 2 .

In this way, in the absorbent article 1, the color of the absorber 4 viewed through the outer portion (auxiliary sheet 5) than the surface sheet 2 is lower than that viewed through the central portion of the surface sheet 2 (the surface sheet 2 and the auxiliary sheet 5) in a plan view. Sheet 5) The color of the observed absorber is closer to the actual color of the absorber 4 . Therefore, by checking the color of the absorber 4 recognized on the outer side of the surface sheet 2, it is possible to confirm whether or not there is absorbed body fluid up to the end of the width direction W of the absorber 4. Thereby, it is possible to avoid a situation in which body fluid cannot be completely absorbed by the absorber 4 and causes lateral leakage due to absorption of bodily fluid at the end of the width direction W of the absorbent body 4 before the time to replace the absorbent article 1 is found. produce.

In particular, the core wrapping layer 4b can also be colored. In this way, the edge of the absorbent body 4 can be made clearer, so it can be further avoided that even if it is time to replace the absorbent article 1, it is not found that the time point to be replaced has not yet come, resulting in that the body fluid cannot be completely absorbed by the absorbent body 4. And the situation that forms lateral leakage occurs. In addition, if colored, the color difference between the surface sheet 2 and the core material wrapping layer 4b becomes more visible, so it can also be used as an index of alignment in the width direction W and length direction L when wearing. . Specifically, the difference in color difference between the surface sheet 2 and the core wrapping layer 4b (as viewed through the auxiliary sheet 5 ) may be ΔE3 or more.

However, the aforementioned color difference can be measured as follows. (1) X-Rite company make: X-Rite eXact Standard (measurement diameter: 1.5 mm) was prepared. (2) Change the position of the CIE L*a*b* coordinates of the part of the sample to be measured and measure more than 10 points, and calculate the average value ([L1 ^* , a1 ^* , b1 ^* ]). (3) Change the L ^* a ^* b ^* coordinates of the part of the sample to be compared and measure more than 10 points, and calculate the average value ([L2*, a2 ^* , b2 ^* ]). (4) Calculate the color difference ΔE by the following formula: ΔE={(L1 ^* -L2 ^* ) ² +(a1 ^* -a2 ^* ) ² +(b1 ^* -b2 ^* ) ² } ^0.5 .

In this embodiment, the absorbent article 1 has a pair of low-rigidity parts with low rigidity between the central part in the width direction W and both end parts in the width direction W in planar view. Here, the central 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. As shown in FIG. The part between the central part and both end parts of the width direction W contains the auxiliary sheet 5 and the absorber 4 laminated|stacked in the thickness direction T. As shown in FIG. Therefore, the part between the central part and both end parts in the width direction W is a part where few layers are laminated in the thickness direction T and the rigidity is low, that is, a pair of low rigidity parts. Therefore, when the 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 from a pair of low rigidity part as a starting point. That is, both ends (end area|region EA) of the width direction W of the absorbent article 1 can be made to stand up relatively to the skin side. Thereby, the quantity of bodily fluid to the edge part of the width direction W of the surface sheet 2 can be reduced. Therefore, in the present absorbent article 1, even when the amount of bodily fluid is large, lateral leakage of bodily fluid 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 according to the embodiment. This figure is a sectional view along line II-II shown in FIG. 1 . In this configuration example, the pair of side sheets 6 are not used, and instead of the pair of side sheets 6 , there is a structure in which the auxiliary sheet 5 is extended toward both outer sides in the width direction W. In this case as well, the aforementioned effects can be obtained.

However, the structure of the absorber 4 is not limited to the aforementioned example. For example, as another embodiment, the absorbent article 1 may have a length (width) in the width direction W of the absorber that is smaller than a length (width) in the width direction W of the top sheet 2 as another absorber. In this case, a pair of end area|region EA is located in the both outer sides of the width direction W of an absorber, respectively, in planar view. Thereby, when the absorbent article 1 is used, when the absorbent article 1 is sandwiched between the two legs and a force is applied to the absorber toward the inside in the width direction W, the non-joined opposite end of the part located outside the absorber The external region EA becomes easy to stand up toward the skin side. That is, in the absorbent article 1 including such an absorber, both ends (end region EA) of the top sheet 2 in the width direction W can stand up relatively toward the skin side. Thereby, the quantity of bodily fluid to the edge part of the width direction W of the surface sheet 2 can be reduced. Therefore, even in such a case, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed.

However, the structure of the press section (press groove) is not limited to the aforementioned examples. For example, as another embodiment, the absorbent article 1 may also include a pair of auxiliary pressing portions (not shown) 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 the other press section (press ditch). That is, the auxiliary pressing portion may be formed on the auxiliary sheet 5 outside the outer edge 2E of the surface sheet 2 in the width direction W in a plan view. In this case, the pair of auxiliary pressing parts are respectively designed to quickly suck the bodily fluid diffused from the central area CA to the lower absorbent body 4 even if it leaks outward from the end area EA when the absorbent article 1 is used. . Therefore, in the present absorbent article 1, even when the amount of bodily fluid is large, lateral leakage of bodily fluid can be further suppressed.

In this embodiment, the first fibrous layer 2a contains water-retaining fibers, whereby the skin feel of the surface sheet 2 can be improved. The water-retaining fiber is not particularly limited as long as it has the property of absorbing and holding water (water-retaining property). As water-retentive fiber, a cellulose-type fiber is mentioned, for example. In this embodiment, cotton is used as the water-retaining fiber. The second fiber layer 2b contains hydrophobic fibers and water-retaining fibers. The hydrophobic fibers are not particularly limited as long as they are hydrophobic fibers. Examples of hydrophobic fibers include thermoplastic resin fibers. In this embodiment, a PET/PE core-sheath composite fiber is used as the hydrophobic fiber. About the water-retaining fiber, it is the same as the water-retaining fiber of the 1st fiber layer 2a.

In this embodiment, as the auxiliary sheet 5, if it is liquid-permeable, it is not particularly limited, for example, a liquid-permeable non-woven fabric, for example, a non-woven fabric of hydrophobic fibers, among these, thermoplastic resin fibers can be ideally used. of non-woven fabrics. In addition, when the surface sheet 2 contains water-retaining fibers such as cotton, the auxiliary sheet 5 may correspond thereto and contain water-retaining fibers such as cotton. In the absorbent article 1 having such a structure, water-retaining fibers with high liquid diffusivity, etc., communicate from the first fiber layer 2a of the surface sheet 2 to the auxiliary sheet 5 via the second fiber layer 2b. Therefore, by using the liquid diffusion of the body fluid of these fibers, the body fluid can be more stably transferred from the top sheet 2 to the absorber 4 through the auxiliary sheet 5, and the skin feel of the top sheet 2 can be improved, and the Improve absorption performance.

In this embodiment, the absorbent core material 4a of the absorbent body 4 is not particularly limited as long as it has liquid absorbency and liquid retentivity, and examples thereof include liquid retentive materials containing water absorbent fibers such as pulp fibers, Water absorbent material such as superabsorbent polymer (SAP). The core wrapping layer 4b is not particularly limited as long as it is in a form that can hold the absorbent core 4a, and examples thereof include a liquid-permeable sheet containing a hydrophilic nonwoven fabric such as tissue paper.

It does not specifically limit as the side sheet 6, For example, the nonwoven fabric which gave water-repellent treatment, the synthetic resin film which has air permeability, etc. are mentioned. Also, the back sheet 3 is not particularly limited, and examples thereof include liquid-impermeable nonwoven fabrics, synthetic resin films, and composite sheets of these. In this embodiment, the flap portion 9 is formed of the side sheet 6 and the back sheet 3 .

The thickness of the sheet member was measured by the following method. First, a sheet member was cut out 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, an enlarged image was taken from a direction perpendicular to the cut surface of the sheet member using a digital microscope (manufactured by KEYENCE CORPORATION: VHX-100). The enlarged image is an image enlarged at a magnification capable of imaging the entire thickness direction T of the sheet member, and the magnification is, for example, 20 to 50 times. In the 2D image changed from the obtained 3D image, the thickness of the sheet member is measured. The thickness of one sheet member was measured at three cut surfaces, and the average value of the thicknesses measured from a total of 10 sheet members was taken as the thickness of the sheet member.

Especially when the sheet member is a continuous material (for example, the surface sheet 2 ) in the longitudinal direction L, the position of the cut surface of the captured image can be set as follows. (1) Width direction W * Regarding the non-joint portion (for example, the portion placed on the auxiliary sheet 5 without applying the adhesive agent) of 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, count from the outside in the width direction W and set to the position of the boundary between the first block and the second block. *Set to the position of the center part in the width direction W with respect to a central area (for example, central area CA). (2) Length direction L *Set at three positions of the front end, the center, and the rear end in the longitudinal direction L of the clothing fixing portion 7 . Furthermore, in a product without the clothing fixing portion 7, the base portion of the wing portion 9 (two positions at both ends in the longitudinal direction L) and three positions at the center of the length direction L of the wing portion 9 are set. For a product that does not have the clothing fixing portion 7 and the flap portion 9, set the position of the center of the longitudinal direction L of each of the first region, the second region, and the third region that divide the product into three in the longitudinal direction L. As for the sheet members arranged intermittently in the longitudinal direction L, each sheet member is divided into three in the longitudinal direction L, and each sheet member is set at the center position in the longitudinal direction L (three places in each sheet member). However, in each of the above-mentioned positions, the position where the material is compressed such as the embossing, the hinge, and the press section is set to an intermediate position between the embossing, etc., that is, the position where the material is not compressed. middle position. In addition, the position of the said cut surface can be applied to the measurement of the following fiber density.

In addition, the fiber density of the sheet member was measured as follows. First, a sheet member was cut out 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 enlarged and observed. The magnified image is an image magnified to a magnification at which cross-sections of 30 to 60 fibers can be imaged, and the magnification is, for example, 150 to 500 times. In the 2D image varying from the obtained 3D image, the number of cross-sections of the fibers is determined. That is, the number of cross-sections of cut fibers is counted at a cut surface of a predetermined area. The number of fiber cross-sections obtained was converted into the number of fiber cross-sections per 1 mm ² , and this was defined as fiber density (fiber/mm ² ). The measurement was performed at three locations, and the average value of the measured values was taken 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 in a cross section parallel to the thickness direction T is used as the fiber density. In addition, as 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 analysis of X-ray CT. Although the fiber density per unit area and the fiber density per unit volume are different, the relative comparison (for example, size comparison) between the fiber layers becomes the same.

In addition, the mass density of the sheet member was measured as follows. First, regarding the basis weight of the sheet, the sheet was cut into a size of 5 cm×5 cm as a sample, dried in an environment of 100° C. or higher, and then the mass was measured. The measured mass is 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 (manufactured by Daiei Chemical Seiki Co., Ltd.: Model FS-60DS) equipped with a ^measuring piece of 15 cm thickness of. The thicknesses at three places were measured on one sample, and the average value of the thicknesses at three places 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 above-mentioned method by the thickness of each sample of the sheet obtained by the above-mentioned method.

The absorbent article of the present invention is not limited to the above-mentioned embodiments, and can be appropriately combined, modified, and the like within a range not departing from the purpose and technical idea of the present invention.

1: Absorbent article 2: Top sheet 2E: End edge 3: Back sheet 4: Absorber 5: Auxiliary sheet 5E: End edge 6: Side sheet 9: Wing section 11, 14: Press section 12, 13: Press section 13a: compression part 12a: compression part 15: press part 16 (FA): leakproof wall 16E1: fixed end 16E2: free end 17: boundary line A _B : rear area A in the longitudinal direction _C : central area A in the longitudinal direction _F : length Direction front area C _L : center line in longitudinal direction C _W : center line in width direction CA: center area EA: end area XA: excretion opening contact area L: length direction W: width direction

[ Fig. 1 ] is a plan view showing a configuration example of an absorbent article according to an embodiment. [ Fig. 2 ] is a sectional view taken along line II-II of Fig. 1 . [ Fig. 3 ] is a cross-sectional view showing another configuration example of the absorbent article according to the embodiment.

1: Absorbent articles

2: Surface flakes

3: back sheet

2E: End edge

4: Absorber

5: Auxiliary sheet

5E: End edge

6: side sheet

9: wing part

11,14: Press section

12,13: Press section

13a: Compression part

12a: Compression part

15: Press section

16(FA): leakproof wall

16E1: fixed end

16E2: Free end

17: Borderline

A _B : Rear area in the longitudinal direction

A _C : Central area in the longitudinal direction

A _F : Front area in the longitudinal direction

C _L : Centerline in the longitudinal direction

C _W : Centerline in width direction

CA: Central Area

EA: end area

XA: Exhaust port abutment area

L: length direction

W: width direction

Claims (10)

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, wherein in the width direction, the auxiliary sheet The length of the above-mentioned surface sheet is larger than the length of the above-mentioned surface sheet, and the two ends of the above-mentioned auxiliary sheet are respectively extended toward the outer sides of the two ends of the above-mentioned surface sheet. and a pair of end regions located at both ends of the aforementioned width direction adjacent to the two outer sides of the aforementioned width direction of the aforementioned central region, the respective lengths of the aforementioned pair of end regions in the aforementioned thickness direction are shorter than those of the aforementioned central region The length in the thickness direction is large, and the fiber density of each of the pair of end regions is lower than that of the central region. 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, wherein in the width direction, the auxiliary sheet The length of the above-mentioned surface sheet is larger than the length of the above-mentioned surface sheet, and the two ends of the above-mentioned auxiliary sheet are respectively extended toward the outer sides of the two ends of the above-mentioned surface sheet. ; and located at both ends of the aforementioned width direction, adjacent to the aforementioned central region A pair of end regions on the two outer sides of the width direction, the respective lengths of the aforementioned pair of end regions in the aforementioned thickness direction are larger than the length of the aforementioned thickness direction of the aforementioned central region, and the respective skin of the aforementioned pair of end regions The fiber density of the side is higher than that of the non-skin side. 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, wherein in the width direction, the auxiliary sheet The length of the above-mentioned surface sheet is larger than the length of the above-mentioned surface sheet, and the two ends of the above-mentioned auxiliary sheet are respectively extended toward the outer sides of the two ends of the above-mentioned surface sheet. and a pair of end regions located at both ends of the aforementioned width direction adjacent to the two outer sides of the aforementioned width direction of the aforementioned central region, the respective lengths of the aforementioned pair of end regions in the aforementioned thickness direction are shorter than those of the aforementioned central region The length in the thickness direction is large, the pair of end regions are not joined to the auxiliary sheet, and the absorbent article further includes a pair of end pressing portions for pressing the surface sheet, the auxiliary sheet, and the absorbent article. The body is formed so as to straddle the outer edges in the width direction of the pair of end regions. The absorbent article according to claim 3, wherein the length of the absorber in the width direction is smaller than the length of the surface sheet in the width direction, In a plan view, the pair of end regions are respectively located on both outer sides of the absorber in the width direction. 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, wherein in the width direction, the auxiliary sheet The length of the above-mentioned surface sheet is larger than the length of the above-mentioned surface sheet, and the two ends of the above-mentioned auxiliary sheet are respectively extended toward the outer sides of the two ends of the above-mentioned surface sheet. and a pair of end regions located at both ends of the aforementioned width direction adjacent to the two outer sides of the aforementioned width direction of the aforementioned central region, the respective lengths of the aforementioned pair of end regions in the aforementioned thickness direction are shorter than those of the aforementioned central region The length in the thickness direction is large, and in a plan view, a pair of auxiliary pressing parts are provided outside the pair of end regions in the width direction, which are formed by pressing only the auxiliary sheet. 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, wherein in the width direction, the auxiliary sheet The length of the above-mentioned surface sheet is larger than the length of the aforementioned surface sheet, and the two ends of the aforementioned auxiliary sheet extend toward the respective outer sides of the two ends of the aforementioned surface sheet, and the aforementioned surface sheet includes: a central region located in the central portion of the aforementioned width direction; and a pair of end regions located at both ends of the aforementioned width direction and adjacent to the two outer sides of the aforementioned width direction of the aforementioned central region, each of the aforementioned pair of end regions is located in the aforementioned The length in the thickness direction is larger than the length in the thickness direction of the central region, and the mass density of the surface sheet is lower than that of the auxiliary sheet. The absorbent article according to any one of claims 1 to 6, further comprising a pair of pressing portions formed by pressing the top sheet, the auxiliary sheet, and the absorbent body, extending along the longitudinal direction, and Arranged at intervals in the width direction, the outer edges of the pair of end regions in the width direction are respectively outside the width direction of the pair of compression parts. The absorbent article according to any one of claims 1 to 6, wherein each of the pair of end regions is not joined to the auxiliary sheet. The absorbent article according to any one of Claims 1 to 6, wherein, in a plan view, in the width direction, the outer portion of the edge of the surface sheet is viewed through the outer portion of the edge of the surface sheet rather than the center portion of the surface sheet. By viewing, it is easier to confirm the color of the aforementioned absorber. The absorbent article according to any one of claims 1 to 6, further comprising a pair of side sheets joined to both ends of the auxiliary sheet in the width direction, extending along the longitudinal direction, and having a pair of side sheets when viewed from above. , between the central part of the aforementioned width direction and the aforementioned width direction A pair of low-rigidity parts with low rigidity are provided between the opposite end parts.

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