absorbent articles

Abstract

To reduce the risk of leakage of egesta from an absorbent article by suppressing planar spreading of egesta on a front surface of a skin side sheet even when cotton is used in a skin side sheet.SOLUTION: An absorbent article (1) has a longitudinal direction, a width direction, and a thickness direction that are mutually crossed one another, and includes: an absorbent body (10); a skin side sheet (2) arranged to be closer to skin than the absorbent body (10) in the thickness direction; and an intermediate sheet (3) arranged between the absorbent body (10) and the skin side sheet (2) in the thickness direction. The skin side sheet (2) includes cotton and has linear compression parts (Es) and holes (H). The linear compression parts (Es) are formed to compress only the skin side sheet (2) and the intermediate sheet (3) in the thickness direction. The holes (H) penetrate the skin side sheet (2) and the intermediate sheet (3) from a skin side so as to reach the absorbent body (10).SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to an absorbent article. [Background technology]

[0002] Sanitary napkins, panty liners, and absorbent pads are examples of absorbent articles that are fastened to the wearer's clothing. As disclosed in Patent Document 1, it is known that the top sheet 11 that comes into direct contact with the wearer's skin is made of cotton fiber to improve the feel against the skin. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2017-205143 Summary of the Invention [Problem to be solved by the invention]

[0004] However, in the absorbent article shown in Patent Document 1, which uses cotton fiber for the top sheet 11, the high liquid absorption and moisture retention properties of cotton fiber tend to cause the absorbed liquid to easily diffuse in the top sheet 11 layer, i.e., the sheet layer that comes into contact with the wearer's skin, making it difficult for the absorbed liquid to reach the second sheet 12 or absorber 13. This raises the risk of the absorbed liquid causing discomfort to the wearer, such as stickiness.

[0005] The present invention has been made in consideration of the above-mentioned conventional problems, and its purpose is to make it easier to prevent excrement from spreading in a planar manner on the surface of the skin-side sheet, even when the skin-side sheet is made of a material containing cotton, thereby reducing the risk of excrement leaking from the absorbent article. [Means for solving the problem]

[0006] The main invention to achieve the above object is: The longitudinal direction, width direction, and thickness direction are perpendicular to each other, An absorber; a skin-side sheet disposed closer to the skin than the absorbent body in the thickness direction; an intermediate sheet disposed between the absorbent body and the skin side sheet in the thickness direction, the skin side sheet contains cotton, having linear compressed portions and holes, the linear compression portions are formed so as to compress only the skin side sheet and the intermediate sheet in the thickness direction, the holes pass through the skin side sheet and the intermediate sheet from the skin side and reach the absorbent body, The linear compression portion is arranged in plurality, A plurality of inner regions surrounded by the compressed lines that do not have intersections between the compressed lines are provided, The hole portion is not provided at the intersection of the extension lines of the linear compressed portions surrounding the inner region, a plurality of main body compression sections different from the linear compression sections, which are formed to compress the skin side sheet, the intermediate sheet, and the absorbent body in the thickness direction; a main body compression region, which is the largest region surrounded by the plurality of main body compression portions, is arranged so as to surround the region that will be the crotch area of ​​the wearer when worn; The hole is provided inside the main body compression region and is not provided outside the main body compression region, The linear compression portions are provided on the inside and outside of the main body compression area. The absorbent article is characterized by the above. Other features of the present invention will become apparent from the description of this specification and the accompanying drawings. [Effects of the Invention]

[0007] According to the present invention, even when cotton is used for the skin side sheet, it is possible to easily prevent excrement from spreading in a planar manner on the surface of the skin side sheet, thereby reducing the risk of excrement leaking from the absorbent article. [Brief explanation of the drawings]

[0008] [Figure 1] FIG. 1 is a plan view of a sanitary napkin 1 as seen from the skin side. [Figure 2] FIG. 2 is a plan view of the napkin 1 as seen from the non-skin side. [Figure 3] FIG. 3 is a schematic cross-sectional view of the napkin 1 taken along the line AA in FIG. [Figure 4] FIG. 4 is an enlarged view of the central portion 1B. [Figure 5] FIG. 5 is a view illustrating a cross section of a portion indicated by an arrow BB in FIG. [Figure 6] Fig. 6A is a diagram illustrating a cross section of a portion indicated by an arrow CC in Fig. 4. Fig. 6B is a diagram illustrating a cross section of a portion indicated by an arrow DD in Fig. 4. [Figure 7] FIG. 7 is a diagram illustrating the main body compression region W. DETAILED DESCRIPTION OF THE INVENTION

[0009] At least the following matters will become clear from the description of this specification and the accompanying drawings. An absorbent article having a longitudinal direction, a width direction, and a thickness direction that are perpendicular to each other, and comprising an absorbent body, a skin-side sheet that is arranged on the skin side of the absorbent body in the thickness direction, and an intermediate sheet that is arranged between the absorbent body and the skin-side sheet in the thickness direction, wherein the skin-side sheet contains cotton and has linear compression portions and hole portions, the linear compression portions are formed so as to compress only the skin-side sheet and the intermediate sheet in the thickness direction, and the hole portions extend from the skin side through the skin-side sheet and the intermediate sheet and reach the absorbent body.

[0010] In such an absorbent article, the linear compressed portions with a higher fiber density make it easier to suppress the two-dimensional diffusion of excrement on the surface of the skin side sheet, and the holes that penetrate from the skin side sheet to the absorbent core make it easier for the excrement to be absorbed into the absorbent core. Therefore, even if cotton, which improves the feel against the skin and tends to give the wearer a luxurious feel, is used for the skin side sheet, it is easier to suppress the two-dimensional diffusion of excrement on the surface of the skin side sheet, and the risk of excrement leaking from the absorbent article can be reduced.

[0011] In such an absorbent article, it is desirable that the compressed lines intersect with both the longitudinal direction and the width direction.

[0012] Such an absorbent article makes it easier to suppress the planar diffusion of excrement on the surface of the skin side sheet, thereby reducing the risk of excrement leaking from the absorbent article.

[0013] In such an absorbent article, it is desirable that the compressed lines are curved.

[0014] With such an absorbent article, it is easier to suppress the planar diffusion of excrement on the surface of the skin-side sheet than when the linear compression portions are straight, and the risk of the absorbent article bending along the linear compression portions is reduced.

[0015] In such an absorbent article, it is desirable that a plurality of the linear compression portions are arranged, a plurality of inner regions are provided surrounded by the plurality of linear compression portions, and each of the plurality of inner regions has a convex shape with its central portion protruding toward the skin.

[0016] According to such an absorbent article, the plurality of convex portions makes it easier for the wearer to get the impression that the absorbent article is soft.

[0017] In such an absorbent article, it is desirable that a plurality of the compressed lines are arranged, and that a plurality of inner regions are provided that are surrounded by the compressed lines and do not have intersections between the compressed lines.

[0018] Such an absorbent article reduces the risk of excrement spreading along the continuous compressed lines and leaking out from the outside in the longitudinal and width directions of the absorbent article.

[0019] In such an absorbent article, it is desirable that a plurality of the linear compression portions are arranged, an inner region is provided surrounded by the plurality of the linear compression portions, and at least one of the hole portions is provided in one of the inner regions.

[0020] In such an absorbent article, the compressed lines suppress the diffusion of body waste, and the body waste retained in the inner region can be more easily moved from the holes to the absorbent body.

[0021] In such an absorbent article, it is desirable that the linear compression portions and the hole portions are each arranged in multiple numbers, an inner region surrounded by the multiple linear compression portions is provided, the multiple hole portions have first hole portions and second hole portions adjacent to each other in the longitudinal direction, and the distance between the first hole portion and the second hole portion in the longitudinal direction is shorter than the length of the inner region.

[0022] According to such an absorbent article, holes can be easily formed in the inner region, which makes it easier for body waste to be transported by the absorbent body.

[0023] It is desirable that such an absorbent article has a plurality of main body compression sections formed to compress the skin side sheet, the intermediate sheet and the absorbent body in the thickness direction, the hole sections being provided inside the main body compression area, which is the largest area surrounded by the plurality of main body compression sections, and not outside the main body compression area, and the linear compression sections being provided inside and outside the main body compression area.

[0024] With such an absorbent article, by providing linear compressed portions over a wider area, the absorbent article is more likely to give the wearer the impression of being soft, while by providing holes only inside the main body compressed area which absorbs a large amount of excrement, the risk of the absorbent article becoming excessively hard due to the holes is reduced compared to when holes are provided over the entire absorbent body.

[0025] In such an absorbent article, it is desirable that a plurality of the linear compression portions are arranged, a plurality of inner regions surrounded by the plurality of linear compression portions are provided, and the inner region that does not have the hole portion is provided outside the main compression region.

[0026] According to such an absorbent article, the inner region makes it easier for the wearer to feel that the absorbent article is soft.

[0027] In such an absorbent article, it is desirable that the fiber density of the skin side sheet in the adjacent portion adjacent to the hole is greater than the fiber density of the skin side sheet in the outer region adjacent to the adjacent portion from the outside.

[0028] In such an absorbent article, the adjacent region, which has a higher fiber density than the outer region, is more likely to move body waste to the absorbent body by capillary action.

[0029] ===First Embodiment=== Below, an embodiment of the present invention will be described using a sanitary napkin as an example of an absorbent article according to the present invention, but the absorbent article is not limited to sanitary napkins and may be any absorbent article that is fixed to the user's clothing, such as a panty liner or a light incontinence pad.

[0030] <<Basic components of sanitary napkin 1>> Fig. 1 is a plan view of a sanitary napkin 1 (hereinafter referred to as "napkin") as seen from the skin side. Fig. 2 is a plan view of the napkin 1 as seen from the non-skin side. Fig. 3 is a schematic cross-sectional view of the napkin 1 taken along line AA in Fig. 1.

[0031] The napkin 1 has a longitudinal direction, a width direction, and a thickness direction that are perpendicular to one another. In the longitudinal direction of the napkin 1, the side that contacts the user's lower abdomen is called the "front side," and the side that contacts the user's buttocks is called the "rear side." In the thickness direction of the napkin 1, the side that contacts the user's skin is called the "skin side," and the opposite side is called the "non-skin side." Line XX in the figure is the center line in the width direction.

[0032] The napkin 1 has a pair of wing portions 1W extending outward in the width direction from the center portion in the longitudinal direction. Hereinafter, in the longitudinal direction of the napkin 1, the portion where the wing portions 1W are provided will be referred to as the center portion 1B, the portion in front of the center portion 1B will be referred to as the front portion 1A, and the portion behind the center portion 1B will be referred to as the rear portion 1C.

[0033] The napkin 1 also has a skin-side sheet 2, an intermediate sheet 3, an absorbent body 10, a non-skin-side sheet 4, and a side sheet 6 in the widthwise center. The skin-side sheet 2, intermediate sheet 3, absorbent body 10, and non-skin-side sheet 4 are layered in this order from the skin side in the thickness direction, and the side sheet 6 is arranged from the widthwise end of the skin-side surface of the skin-side sheet 2 to the widthwise end of the non-skin-side surface of the absorbent body 10. In other words, the side sheet 6 is arranged to sandwich each of the components 2, 3, and 10 in the thickness direction. The side sheet 6 may be formed from a single sheet component, as shown in FIG. 3 , or may be formed as a double layer by folding back a single sheet component. The skin-side sheet 2, intermediate sheet 3, absorbent body 10, non-skin-side sheet 4, and side sheet 6 are each bonded and fixed using an adhesive such as a hot-melt adhesive. The adhesive is applied to both the skin-side and non-skin-side surfaces of each component in any pattern, which can be selected from an Ω pattern, a spiral pattern, a stripe pattern, and the like. For convenience, the adhesive is omitted from FIG. 3 and other figures.

[0034] The skin-side sheet 2 is a liquid-permeable sheet member made of cotton. The skin-side sheet 2 is the part that comes into direct contact with the wearer's skin during wear. Therefore, using cotton, a natural fiber, for the skin-side sheet 2 can further improve the feel felt by the wearer. It is known that the wearer's skin tends to become sensitive, particularly during the menstrual period when wearing a sanitary napkin. In this regard, using cotton for the skin-side sheet 2 of the napkin 1 can reduce irritation to the wearer's skin, help reduce the risk of itching or rashes, and give the napkin a visually soft impression, creating a sense of luxury. In this embodiment, a sheet member made of 100% cotton is used, but this is not limited to this. For example, a blend of cotton and air-through nonwoven fabric may also be used. However, the higher the proportion of cotton in the skin-side sheet 2, the more likely it is to improve the feel against the wearer's skin.

[0035] The intermediate sheet 3 is a liquid-permeable sheet material, and examples thereof include air-through nonwoven fabric and spunbond nonwoven fabric. The wing sheets 5 and side sheets 6 are each hydrophobic sheet material, and examples thereof include air-through nonwoven fabric and spunbond nonwoven fabric. The non-skin side sheet 4 is a liquid-impermeable sheet material, and examples thereof include polyethylene (PE) resin film. The non-skin side sheet 4 is larger in planar size than the absorbent body 10, and covers the entire plane of the absorbent body 10.

[0036] The wing portions 1W are formed by wing sheets 5 extending outward from both widthwise sides of the skin side sheet 2, etc., and the non-skin side sheet 4. Note that the napkin 1 may not have the wing portions 1W.

[0037] The absorbent body 10 is a member that absorbs and retains bodily waste. As shown in Fig. 3, the absorbent body 10 has an absorbent core 11 and a cover sheet 12 that covers the absorbent core 11. The absorbent core 11 is made by adding liquid-absorbent fibers such as pulp fibers or cellulosic absorbent fibers to liquid-absorbent granular materials such as superabsorbent polymers (so-called SAPs), and molding the mixture into a predetermined shape. The cover sheet 12 is a liquid-permeable sheet, such as tissue paper.

[0038] The non-skin side of the napkin 1 (i.e., the non-skin side of the non-skin side sheet 4) is provided with a central adhesive area 8, which is formed by applying an adhesive or the like. In Fig. 2, the central adhesive areas 8 are eleven rectangular central adhesive areas 8 with long sides in the longitudinal direction, arranged at intervals in the width direction, but the shape, number, and arrangement of the central adhesive areas 8 are not limited to this. When the napkin 1 is in use, the central adhesive areas 8 are attached to the skin side of clothing such as underwear, thereby securing the napkin 1 to the underwear.

[0039] Similarly, a wing adhesive portion 9 is provided on the non-skin side in the thickness direction of each wing portion 1W (the non-skin side cotton of the non-skin side sheet 4). In FIG. 2, the wing adhesive portions 9 are four rectangular wing adhesive portions 9 with long sides in the longitudinal direction, arranged at intervals in the width direction, but the shape, number, and arrangement of the wing adhesive portions 9 are not limited to this. When using the napkin 1, the wing portion 1W is folded toward the non-skin side, and the wing adhesive portion 9 is attached to the non-skin side of underwear or the like. In this way, the wing portion 1W is fixed to the underwear or the like.

[0040] <<About the linear compression section Es, the main compression section Eb, and the hole section H>> The napkin 1 has a plurality of compressed lines Es, a plurality of compressed main body portions Eb, and a plurality of holes H. As shown in FIGS. 1 and 4, when the napkin 1 is viewed from the skin side, the compressed lines Es, the compressed main body portions Eb, and the holes H can be seen. FIG. 4 is an enlarged view of the central portion 1B. FIG. 5 is a view illustrating a cross section of the portion indicated by the arrow BB in FIG. 4. FIG. 6A is a view illustrating a cross section of the portion indicated by the arrow CC in FIG. 4, and FIG. 6B is a view illustrating a cross section of the portion indicated by the arrow DD in FIG. 4. In FIG. 4, both wing portions 1W of the central portion 1B are omitted, and the central portion in the width direction of the napkin 1 is shown enlarged. For convenience, FIGS. 5, 6A, and 6B illustrate the cross sections of the skin side sheet 2, intermediate sheet 3, and absorbent body 10, and omit the non-skin side sheet 4 and the like.

[0041] The multiple compressed lines Es are disposed over substantially the entire area where the skin side sheet 2 and the intermediate sheet 3 are overlapped. As shown in Figures 3 and 5, each compressed line Es is a single linear line formed by compressing only the skin side sheet 2 and the intermediate sheet 3 in the thickness direction. Specifically, it is a compressed line having two ends and a predetermined length in the longitudinal and width directions, and is a portion where the skin side sheet 2 and the intermediate sheet 3 are compressed while the absorbent body 10 is not compressed. Due to the compression, the fiber density of the skin side sheet 2 and the intermediate sheet 3 is higher than that of the uncompressed portion. Note that the compressed lines Es of the napkin 1 are formed linearly by a collection of circular compressed lines, but are not limited to this. For example, the compressed lines Es may be linear compressed lines. However, by using linear compressed portions Es formed by a collection of circular compressed portions as in napkin 1, the risk of the skin-side sheet 2 and intermediate sheet 3 becoming excessively hard is reduced compared to linear compressed portions Es formed by a collection of linear compressed portions, and the feel against the skin when worn can be improved.

[0042] The multiple holes H are arranged in a generally staggered pattern in the longitudinal and widthwise central portions of the napkin 1. As shown in Figures 3 and 5, the holes H are circular holes in plan view that penetrate from the skin side through the skin side sheet 2, intermediate sheet 3, and absorbent body 10. The holes H in the napkin 1 are formed by piercing a pin or the like from the skin side to the absorbent body 10, and in plan view, the size of the holes H is larger than the size of one of the circular compressed portions that make up the compressed lines Es. Note that the holes H in the napkin 1 have a depth that reaches the non-skin side of the absorbent body 10, but this is not limited to this. The depth of the holes H need only penetrate from the skin side through the skin side sheet 2 and intermediate sheet 3 and reach the absorbent body 10.

[0043] The compressed main body portion Eb is shaped to surround the area that is thought to come into contact with the wearer's vaginal opening when the garment is worn. As shown in Figure 5, the compressed main body portion Eb is a compressed portion formed into the desired shape by compressing the skin side sheet 2, intermediate sheet 3, and absorbent body 10 in the thickness direction. As a result of compression, the fiber density of the skin side sheet 2, the fiber density of the intermediate sheet 3, and the fiber density of the absorbent body 10 are all higher than in the uncompressed portions.

[0044] The compressed lines Es, compressed main bodies Eb, and holes H can be formed as follows: First, the skin side sheet 2 and intermediate sheet 3, which have been joined together using an adhesive, are passed through a roll gap between a convex roller (not shown) having multiple convex portions and an anvil roller (not shown) with a flat surface, and the skin side of the skin side sheet 2 is compressed to form the compressed lines Es.

[0045] Next, the skin side sheet 2 and intermediate sheet 3, each having compressed linear portions Es formed thereon, are placed on the skin side of the absorbent body 10, joined together using an adhesive, and passed through a roll gap between a convex roller (not shown) having multiple convex portions for forming holes H and main compressed portions Eb, and an anvil roller (not shown), to form the holes H and main compressed portions Eb. The convex roller for forming the holes H and main compressed portions Eb has pin-shaped pins that are sharper than the convex portions of the convex roller that form the compressed linear portions Es, in order to form the holes H, and has convex portions that protrude longer than the convex portions of the convex roller that form the compressed linear portions Es, in order to form the main compressed portions Es.

[0046] Thereafter, the non-skin side sheet 4 and the like are laminated on the non-skin side of the absorbent body 10 to obtain the napkin 1. Note that the skin side sheet 2, intermediate sheet 3 and other components may be formed from a continuous sheet in which multiple sheets are connected together, which is processed as described above and then cut individually to form the napkin 1. Furthermore, the hole portions H and the main body compressed portions Eb do not necessarily have to be formed simultaneously on the same roller, and may be formed separately.

[0047] Conventionally, when a napkin 1 is worn and used to absorb bodily waste, the skin-side sheet 2, which uses cotton with high liquid absorption and moisture retention, tries to absorb as much of the bodily waste as possible, which can result in the bodily waste being dispersed within the skin-side sheet 2 layer, making it difficult for the bodily waste to reach the intermediate sheet 3 or absorbent body 10. This can lead to the bodily waste remaining on the skin-side surface of the napkin 1, which can come into contact with the wearer's skin, potentially causing discomfort, itching, or a rash.

[0048] In this regard, as shown in Figure 5, the napkin 1 is provided with compressed lines Es, which increases the fiber density of the skin side sheet 2 and intermediate sheet 3, making it easier for the compressed lines Es to absorb bodily exudates through capillary action. In other words, the compressed lines Es make it easier for the bodily exudates received by the skin side sheet 2 to be retained, and the compressed lines Es prevent the exudates from continuing to spread within the layer of the skin side sheet 2. When the compressed lines Es prevent diffusion, the amount of bodily exudates per unit area increases near the areas where the compressed lines Es are provided. This increased amount of bodily exudates per unit area falls into the holes H, allowing the exudates that have entered the holes H to be absorbed by the absorbent body 10 before spreading over a wide area of ​​the skin side sheet 2 or intermediate sheet 3. When the holes H are formed by pins or the like, the fiber density of the skin side sheet 2, the intermediate sheet 3, and the absorbent body 10 around the holes H is higher, and therefore the holes H are more likely to absorb excrement due to capillary action. As a result, even if cotton is used for the skin side sheet 2 to improve the feel against the skin or to give a visually soft impression, the skin side sheet 2 diffuses the excrement on its surface, reducing the risk of excrement leaking from the napkin 1 or discomfort caused by excrement continuing to come into contact with the skin.

[0049] Furthermore, as shown in Figure 5 and other figures, the compressed lines Es are recessed, which makes it easier for bodily waste to move to the compressed lines Es, and the higher fiber density of the compressed lines Es makes it easier to diffuse the bodily waste in the thickness direction from the skin side sheet 2 to the intermediate sheet 3, making it easier to guide the bodily waste to the absorbent body 10. It is also thought that if the compressed lines Es are formed deeper and compressed all the way to the absorbent body 10, it will be easier to diffuse the bodily waste in the thickness direction. However, if the compressed lines Es are compressed deep enough to reach the absorbent body 10, the rigidity of the compressed lines Es will make the absorbent body 10 and napkin 1 hard, which may reduce the feel against the skin when worn and cause discomfort when worn. For this reason, it is preferable to form the compressed lines Es by compressing only the skin side sheet 2 and intermediate sheet 3.

[0050] As shown in Figures 1 and 4, each compressed line Es is preferably arranged in an oblique shape that intersects both the longitudinal and width directions. This makes it easier to reduce the risk of linear diffusion of excrement across the skin side sheet 2 than if the compressed lines were arranged parallel to the longitudinal and width directions. It is also preferable that each compressed line Es is curved. A higher fiber density in the compressed lines Es makes it easier for excrement to diffuse along the compressed lines Es due to capillary action, making it easier to reduce the risk of linear diffusion of excrement. Furthermore, because the compressed lines Es are more rigid than parts without them, it is also possible to reduce the risk of bending at the compressed lines Es compared to when the compressed lines Es are arranged in a straight line.

[0051] It is preferable that the napkin 1 has an inner region U surrounded by a plurality of compressed lines Es. As shown in Figure 4, the napkin 1 has a plurality of roughly diamond-shaped inner regions U surrounded on all four sides by four compressed lines Es, and they have roughly the same shape and size. As mentioned above, the compressed lines Es are linear, consisting of a collection of a plurality of circular compressed lines, so the upper end of the inner region U is the upper end of the circular compressed line located most ventrally of the two compressed lines Es located on the ventral side, and the lower end of the inner region U is the lower end of the circular compressed line located most dorsally of the two compressed lines Es located on the dorsal side. Similarly, one end of the inner region U in the width direction, for example the left end, is the left end of the leftmost circular compressed line of the two left-hand compressed lines Es, and the other end of the bottom region U in the width direction, for example the right end, is the right end of the rightmost circular compressed line of the two right-hand compressed lines Es. The length Lu of the inner region U of the napkin 1 in the longitudinal direction is 24.3 mm, and the length Wu in the width direction is 21.2 mm.

[0052] The inner region U, which has linear compressed portions Es on all four sides that suppress the planar diffusion of excrement in the skin-side sheet 2, makes it easier to keep excrement inside the inner region U, thereby reducing the risk of the excrement spreading in a planar manner in the skin-side sheet 2. It is also preferable that the central portions of the multiple inner regions U each have a convex shape that protrudes toward the skin. Specifically, as shown in Figures 6A and 6B, it is preferable that the longitudinal and lateral central portions of the inner region U, which are formed by the compression of the skin-side sheet 2 and the intermediate sheet 3, each have a shape that protrudes toward the skin. When viewed from the skin side, this looks like a quilted fabric, which tends to give the wearer a soft impression.

[0053] Furthermore, as shown in Figure 4, it is more preferable that there are provided a plurality of inner regions U surrounded by compressed lines Es that do not have any intersections between them. Specifically, in the napkin 1, the inner region U is surrounded by four compressed lines Es, and these four compressed lines Es do not have any intersections with each other. In other words, the periphery of the inner region U is provided with compressed lines Es and regions where no compressed lines are formed. For example, of the four compressed lines Es that make up one inner region Ua, for the ventral-side compressed line Esa and the dorsal-side compressed line Eb that are adjacent in the longitudinal direction, an uncompressed region N is provided between the dorsal-side end of the dorsal-most circular compressed line Esa and the ventral-side end of the ventral-most circular compressed line Esb. Similarly, of the four linear compressed sections Es that make up the inner region Uc, which is located diagonally below and to the left of the inner region Ua, for the right-hand linear compressed section Esb and the left-hand linear compressed section Esc that are adjacent in the width direction, an uncompressed non-compressed section N is provided between the left end of the circular compressed section located on the leftmost side of the linear compressed section Esb and the right end of the circular compressed section located on the rightmost side of the linear compressed section Esc.

[0054] The compressed lines Es have a higher fiber density in the skin side sheet 2 than the parts that do not comprise the compressed lines Es. Therefore, while excrement absorbed by the skin side sheet 2 when worn tends to first spread along the compressed lines Es, the provision of parts where the compressed lines Es are not continuous can slow down the rate at which the excrement spreads. In other words, by making it easier for the excrement to temporarily remain in the non-compressed parts N while reducing the risk of the excrement continuing to spread along the compressed lines Es, it is easier to promote absorption of the excrement in the thickness direction and reduce the risk of the excrement leaking out from the outside widthwise and outside lengthwise directions of the napkin 1. With regard to the right-hand and left-hand compressed lines Esb and Esc that are adjacent in the width direction and make up the non-compressed section N, it is preferable that the widthwise distance between the left edge of the leftmost circular compressed line Esb and the right edge of the rightmost circular compressed line Esc is 1.5 mm or more and less than 5.0 mm. In the case of napkin 1, this distance is 2.0 mm. If the widthwise distance between the left edge of the leftmost circular compressed line Esb and the right edge of the rightmost circular compressed line Esc is less than 1.5 mm, there is a risk of body waste spreading, as in the case where the compressed lines Esb and Esc are continuous, and there is a risk of body waste leaking outward in the width direction of the napkin 1. On the other hand, if the widthwise distance between the left end of the circular compression portion located at the leftmost position among the linear compression portions Esb and the right end of the circular compression portion located at the rightmost position among the linear compression portions Esc is 5.0 mm or more, it becomes difficult to suppress the planar diffusion of excrement in the layer of the skin side sheet 2.

[0055] It is preferable that at least one hole H is provided, as in the inner region Ua and inner region Uc in Fig. 4. Specifically, one hole H is provided in the inner region Ua, and two holes H are provided in the inner region Uc. By providing the hole H inside the inner region U, it is possible to make the excrement retained inside the inner region U fall in the thickness direction from the skin side sheet 2 side to the absorbent body 10 by the hole H. As a result, the excrement can be more easily absorbed by the absorbent body 10.

[0056] As shown in FIG. 5, when, in the napkin 1, an adjacent portion X adjacent to the hole portion H is defined and an outer region Y adjacent to the adjacent portion X from the outside is defined, among the skin-side sheet 2, the cotton fiber density of the skin-side sheet 2 in the adjacent portion X is preferably greater than the cotton fiber density of the skin-side sheet 2 in the outer region Y. Similarly, among the intermediate sheet 3, the fiber density of the non-woven fabric of the intermediate sheet 3 in the adjacent portion X is greater than the fiber density of the non-woven fabric of the intermediate sheet 3 in the outer region Y, and among the absorber 10, the fiber density of the liquid-absorbent fibers of the absorber 10 in the adjacent portion X is preferably greater than the fiber density of the liquid-absorbent fibers of the absorber 10 in the outer region Y. Excrement reaching the adjacent portion X is more likely to diffuse toward the non-skin side in the thickness direction by the capillary action of each member having a higher fiber density, and it becomes easier to move the excrement to the absorber 10. By pressing the hole portion H with a pin or the like to form it, the fiber density of each of the skin-side sheet 2, the intermediate sheet 3, and the absorber 10 can be increased.

[0057] As shown in FIG. 4, the distance Lh between the hole portion H1 and the hole portion H2 adjacent in the longitudinal direction is 12.0 mm, and it is preferably shorter than the longitudinal length Lu of the inner region U (Lh < Lu). Therefore, particularly when the hole portions H are arranged regularly as in the napkin 1, the hole portions H are likely to be arranged within the inner region U. Therefore, it becomes easier to move the excrement retained within the inner region U to the absorber 10. Similarly, the distance Wh between the hole portion H1 and the hole portion H2 adjacent in the width direction is 14.0 mm, and it is more preferably shorter than the widthwise length Wu of the inner region (Wh < Wu).

[0058] Furthermore, it is preferable that the holes H are provided inside the main body compressed region W, which is the largest region surrounded by the multiple main body compressed regions Eb, and not outside the main body compressed region. FIG. 7 is a diagram illustrating the main body compressed region W. In FIG. 7, each component of the napkin 1 is indicated by a dotted line, and the main body compressed region W is indicated by a solid line. As shown in FIG. 7, the napkin 1 is provided with multiple main body compressed regions Eb symmetrically about the center line XX, and the main body compressed region W is arranged in a shape that surrounds the center of the absorbent body 10 in the width direction and the center of the length direction, which is the region that will be between the wearer's crotch when worn. The multiple main body compressed regions Eb are arranged spaced apart from each other, and the largest region surrounded by the main body compressed regions Eb when the shortest distance between the closest main body compressed regions Eb is drawn in a straight line is called the main body compressed region W. In this case, the holes H are provided within the region surrounded by the main body compressed region W. On the other hand, the linear compressed portions Es are provided inside and outside the main compressed area W, and are provided over almost the entire area of ​​the skin side sheet 2 and the intermediate sheet 3, regardless of the main compressed area Eb or the main compressed area W.

[0059] Because the compressed lines Es can form an uneven surface like quilted fabric, providing compressed lines Es over a wider area of ​​the skin-side surface of the napkin 1 makes it easier for the wearer to feel that the napkin 1 is soft. On the other hand, if holes H were provided over the entire absorbent body 10, the wearer might worry about leakage through the holes H, and if they were formed with pins or the like, the areas around the holes H might become stiff, making the napkin 1 too stiff overall. Therefore, providing compressed lines Es over a wider area gives a soft impression, while providing holes H inside the main compressed region W, which absorbs a large amount of bodily exudates, makes it easier to reliably absorb bodily exudates. It is also more preferable that the area of ​​the holes H is smaller than the area of ​​the non-compressed regions N. This makes the holes H more easily recognized as part of the design of the napkin 1, and reduces the risk of the wearer feeling that bodily exudates will leak vertically through the holes H. In addition, when the skin side sheet 2 and the non-skin side sheet 4 are welded together using multiple welded joints, it is more preferable that the area of ​​the hole H is the same as the size of the welded joints between the skin side sheet 2 and the non-skin side sheet 4.

[0060] Furthermore, as shown in Figure 1, it is preferable to have an inner region Ur outside the main body compressed region W that does not have holes H. Providing the inner region Ur outside the main body compressed region W can easily improve the soft impression of the napkin 1. Also, since the area outside the main body compressed region W does not absorb excrement directly from the skin side, it is possible to reduce the risk of the napkin 1 becoming too hard by providing too many holes H.

[0061] ===Other embodiments=== Although the embodiments of the present invention have been described above, the above embodiments are intended to facilitate understanding of the present invention and are not intended to limit the present invention. Furthermore, the present invention may be modified or improved without departing from the spirit thereof, and it goes without saying that the present invention includes equivalents thereof. For example, the following modifications are possible.

[0062] In the above-described embodiment, a plurality of compressed lines Es, compressed main body portions Eb, and holes H are provided, but this is not limited to this. Only one of each may be provided, or the number of each may be changed as appropriate depending on the softness of the napkin 1 and the amount of excrement. Similarly, the shapes and sizes of the compressed lines Es, compressed main body portions Eb, and holes H may also be changed as appropriate. The shape and size of the inner region U may also be changed as appropriate.

[0063] In the above-described embodiment, the absorbent core 11 is formed from liquid-absorbent fibers to which a superabsorbent polymer has been added, but this is not limiting. For example, the absorbent core 11 may be a sheet material made only of a superabsorbent polymer, or may be made only of liquid-absorbent fibers. Also, it is not necessary to use a cover sheet, and the absorbent body 10 may be formed only from the absorbent core 11. [Explanation of symbols]

[0064] 1 napkin (absorbent article), 1A front part, 1B center part, 1C rear part, 1W wing part, 2 Skin side sheet, 3 Middle sheet, 4 Non-skin side sheet, 5 Wing sheet, 6 side seats, 8 central adhesive part, 9 wing adhesive part, 10 absorbent body, 11 absorbent core, 12 cover sheet, Es: Linear compression part, Eb: Main compression part, H: Hole section, N: Non-compressed section, U: Inner area, W: Main body compressed area

Claims

1. The longitudinal direction, width direction, and thickness direction are perpendicular to each other, An absorber; a skin-side sheet disposed closer to the skin than the absorbent body in the thickness direction; an intermediate sheet disposed between the absorbent body and the skin side sheet in the thickness direction, the skin side sheet contains cotton, having linear compressed portions and holes, the linear compression portions are formed so as to compress only the skin side sheet and the intermediate sheet in the thickness direction, the holes pass through the skin side sheet and the intermediate sheet from the skin side and reach the absorbent body, The linear compression portion is arranged in plurality, A plurality of inner regions surrounded by the compressed lines that do not have intersections between the compressed lines are provided, The hole portion is not provided at the intersection of the extension lines of the linear compressed portions surrounding the inner region, a plurality of main body compression sections different from the linear compression sections, which are formed to compress the skin side sheet, the intermediate sheet, and the absorbent body in the thickness direction; a main body compression region, which is the largest region surrounded by the plurality of main body compression portions, is arranged so as to surround the region that will be the crotch area of ​​the wearer when worn; The hole is provided inside the main body compression region and is not provided outside the main body compression region, An absorbent article characterized in that the linear compressed portions are provided inside and outside the main body compressed region.

2. The absorbent article according to claim 1, The absorbent article is characterized in that the compressed lines intersect with both the longitudinal direction and the width direction.

3. The absorbent article according to claim 2, An absorbent article, wherein the compressed lines are curved.

4. The absorbent article according to any one of claims 1 to 3, An absorbent article characterized in that each of the plurality of inner regions has a convex shape with a central portion protruding toward the skin side.

5. The absorbent article according to any one of claims 1 to 4, An absorbent article, characterized in that at least one of the holes is provided in one of the inner regions.

6. The absorbent article according to any one of claims 1 to 5, The hole portion is arranged in plurality, the plurality of holes include a first hole and a second hole adjacent to each other in the longitudinal direction, In the longitudinal direction, An absorbent article, characterized in that the distance between the first hole portion and the second hole portion is shorter than the length of the inner region.

7. An absorbent article according to any one of claims 1 to 6, An absorbent article, characterized in that the inner region having no holes is provided outside the main body compressed region.

8. An absorbent article according to any one of claims 1 to 7, An absorbent article characterized in that the fiber density of the skin side sheet in the adjacent portion adjacent to the hole portion is higher than the fiber density of the skin side sheet in the outer region adjacent to the adjacent portion from the outside.

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