TWI811469B - absorbent article - Google Patents

Abstract

We provide absorbent articles that improve skin feel and absorbency. In an absorbent article (1), a surface sheet (2), an auxiliary sheet (5), an absorbent body (4), a back sheet (3), and a fixing portion (7) are laminated in this order in the thickness direction. The widthwise dimension of the surface sheet is smaller than the widthwise size of the auxiliary sheet. The surface sheet has a central area (CA) located at the center in the width direction, and a pair of end areas (EA, EA) adjacent to both sides of the central area in the width direction. The central region is joined to the auxiliary sheet, and at least part of the pair of end regions is not joined to the auxiliary sheet. The central area of the surface sheet has a plurality of holes (15).

Description

absorbent articles

The present invention relates to absorbent articles.

In order to efficiently absorb liquid excrement, absorbent articles having openings in a surface sheet are known. For example, Patent Document 1 discloses an absorbent article in which a surface sheet is provided with a plurality of elastic members that are provided to the surface sheet in a state of being stretched in the longitudinal direction and are arranged at intervals in the transverse direction, and a plurality of elastic members. Rows of cuts are provided between adjacent elastic members. Each cut row has a plurality of cut portions spaced apart in the longitudinal direction. The surface sheet is contracted in the longitudinal direction by the contraction force of the elastic member, thereby deforming the surface sheet to form an uneven structure, and each cut portion is Open to form a plurality of openings. [Prior technical literature] [Patent Document]

[Patent Document 1] Japanese Patent Application Publication No. 2009-45334

The absorbent article in Patent Document 1 has a structure in which the cut portions of the cut rows are opened to form a plurality of openings by contraction of the elastic members adjacent to the cut rows during use. Therefore, since the cutout opens or closes according to the movement of the user's body, the opening is unstable. Such unstable changes in the opening may cause irritation to the skin, such as friction, and may cause a decrease in skin feel. Furthermore, if the technology of Patent Document 1 is applied to an absorbent article that is fixed to underwear using a fixing part such as an adhesive and is used close to the skin during use, the elastic member will not shrink easily. Therefore, there is a concern that the opening of the so-called cut portion is difficult to open and that liquid excrement is less likely to be attracted to the absorbent body. Therefore, there is a concern that the absorptive performance is reduced.

The object of the present invention is to provide absorbent articles that not only improve skin touch but also enhance absorption performance.

The absorbent article of the present invention is as described below. (1) The absorbent article has a longitudinal direction, a width direction and a thickness direction, and the surface sheet, the auxiliary sheet, the absorbent body, the back sheet and the fixing part are laminated in this order in the aforementioned thickness direction, and the absorbent article has It is characterized in that the dimension of the front sheet in the width direction is smaller than the size of the auxiliary sheet in the width direction, and the surface sheet has a central region located at the center of the width direction, and a center region adjacent to the central region. The pair of end regions adjacent to both outer sides in the width direction, the central region is joined to the auxiliary sheet, at least part of the pair of end regions is not joined to the auxiliary sheet, and the central region of the surface sheet has Plural holes.

This absorbent article does not open and close according to the movement of the user's body, but has a plurality of holes that are opened from the beginning. However, the holes are depressions in the surface sheet or penetrations on the opposite side, that is, they include depressions or penetration holes caused by pressing. Such a hole can suppress changes in its shape regardless of the movement of the user's body. Thereby, liquid excretion can be efficiently absorbed through the holes, and irritation to the skin due to friction and the like around the holes can be reduced, thereby improving the skin feel. In addition, at this time, since the auxiliary sheet has a larger shape in the width direction than the surface sheet, both end edges of the auxiliary sheet are positioned outside the both end edges of the surface sheet. Thereby, when the absorbent article is used, the two end edges of the auxiliary sheet are brought into contact with both thighs earlier than the two end edges of the surface sheet in the width direction, and the auxiliary sheet is compressed inward, so that the auxiliary sheet can be made to move inward. The upper part (direction of the excretion port) is deformed bulgingly. Thereby, without being joined to the auxiliary sheet, the pair of end regions placed on the auxiliary sheet are deformed to stand upward (in the direction of the excretion port), thereby making it possible to form a pair of end regions. The wall functions. Thereby, liquid excrement can be suppressed from spreading outward in the width direction W and reaching the pair of end regions. That is, the contact of liquid excreta with the user's skin can be reduced, and the burden on the user's skin can be reduced. In this way, absorbent articles can not only improve the skin feel, but also improve the absorption performance.

In the absorbent article of the present invention, (2) is the absorbent article according to the above (1), wherein the central region of the surface sheet and the pair of end regions have a plurality of pores, and when viewed from above, The area of each of the pores present in the pair of end regions may be smaller than the area of each of the pores present in the central region. In this absorbent article, the area of each pore in the pair of end regions present on both sides of the surface sheet is relatively small when viewed from above. Therefore, when viewed from above, the uneven shape formed by the presence or absence of a plurality of pores can be reduced at the edge in the width direction of each of the pair of end regions. Thereby, the frictional irritation to the user's skin caused by the uneven shape of the edge of the surface sheet can be reduced, thereby improving the skin feel. At the same time, the area of each pore present in the central region of the surface sheet is relatively large when viewed from above. Therefore, liquid excreta can be quickly transferred from the plurality of pores in the surface sheet to the absorbent body through the auxiliary sheet, thereby improving the absorption performance. In this way, the absorbent article not only improves the skin feel but also enhances the absorption performance.

The absorbent article (3) of the present invention is the absorbent article according to the above (2), in which the area of the pores in the center region and the pair of end regions of the surface sheet is 0.01 when viewed from above. mm ² or more and 25mm ² or less are also available. In this absorbent article, since the pore area of the surface sheet is 0.01 mm ² or more, the effect of allowing liquid excrement to pass through is increased, and the absorption performance can be improved. In addition, since the area of the pores is 1 mm ² or less, it is possible to suppress excessive unevenness due to the presence or absence of the pores, thereby reducing frictional irritation to the user's skin, thereby improving the skin feel.

The absorbent article of the present invention (4) is the absorbent article according to the above (2) or (3), in which the shape of the pores present in the end regions of the pair is the shape of the pores when viewed in plan view. The dimension in the width direction may be shorter than the dimension in the longitudinal direction.

In this absorbent article, the shape of the pores in the end region of the surface sheet is long in the longitudinal direction. Therefore, when viewed from above, the number of pores that are partially chamfered at the end edge of the surface sheet in the width direction can be reduced, and the unevenness in the width direction caused by the chamfered pores at the end can be reduced. Degree. Thereby, when the pair of end regions of the surface sheet stand up toward the skin side, the frictional stimulation of the surface sheet on the user's skin can be reduced, thereby improving the skin feel.

The absorbent article of the present invention (5) is the absorbent article according to any one of the above items (1) to (4), wherein the surface sheet is formed of a nonwoven fabric, and the fibers constituting the nonwoven fabric are present in the absorbent article. The fibers in the end regions may be oriented more in the longitudinal direction than the fibers present in the central region.

In this absorbent article, since the fiber orientation in the central area of the surface sheet formed of nonwoven fabric is relatively irregular, liquid excretion discharged into the central area can be spread approximately in concentric circles. At the same time, the fibers in the end regions on both sides are relatively oriented in the long-side direction, so that the liquid excrement reaching the end regions on both sides can be diffused in the long-side direction. That is, the absorbent article can be used as a whole, and the absorption performance can be improved. In addition, because the fibers are oriented in the longitudinal direction at the end areas on both sides of the surface sheet, the number of fibers exposed from the end edges to the outside in the width direction is reduced, thereby reducing friction against the skin. , can suppress the loss of skin texture.

The absorbent article of the present invention is (6) the absorbent article according to any one of the above items (1) to (5), further comprising: each of the two ends corresponding to the width direction of the auxiliary sheet. As for a pair of side sheets located on the non-skin side of the two ends, the auxiliary sheet has each of the two ends corresponding to the width direction of the auxiliary sheet, and is configured to connect the two ends. A pair of hollow rolled-in three-dimensional parts on the non-skin surface side of the auxiliary sheet are wrapped in each of the pair of hollow rolled-in three-dimensional parts, and the end of the auxiliary sheet in the width direction is formed by a joint part It may be joined to the inner end in the width direction of the corresponding end of the pair of side sheets.

This absorbent article has a pair of hollow rolled three-dimensional parts at both ends of the auxiliary sheet. Therefore, during use, the user's thighs of both feet hold the absorbent article in the width direction, and when the absorbent body deforms along the shape of the user's crotch, the pair of hollow rolled-in three-dimensional parts follow the absorbent body. The deformation can be easily deformed. That is, the pair of hollow rolled-in three-dimensional parts are sandwiched between the user's two thighs and stand up towards the skin side, so that they can be in close contact with the skin. This can prevent a gap from being formed between each hollow rolled-in three-dimensional part and the crotch part, and liquid excrement leaking from the gap. As a result, while ensuring the touch against the skin, the pair of hollow rolled-in three-dimensional parts can properly guide liquid excrement to the absorber, thereby improving the absorption performance. Furthermore, when fibers that are easily loosened, such as water-retentive fibers (example: cotton), are used as the surface sheet, there will be friction between both ends of the surface sheet in the width direction W, causing the water-retaining fiber to slip from the width direction of the surface sheet. There is a concern that the two ends of the W will loosen and fall off. However, since both end edges of the pair of ring portions are located outside the both end edges of the surface sheet 2, friction between the both end edges can be further suppressed. This can suppress the decrease in skin feel.

The absorbent article of the present invention (7) is the absorbent article according to the above (6), in which the joint in each of the pair of hollow roll-in three-dimensional parts is larger in the width direction when viewed from above. The size of the outer portion of the joint portion may be larger than the size of the outer portion of the joint portion in the pair of end regions. In this absorbent article, the length (dimension) in the width direction of the hollow rolled three-dimensional portion is longer than the length (dimension) in the width direction of the end region of the surface sheet. This is because the pair of hollow rolled-in three-dimensional parts are sandwiched between the user's two thighs and more reliably stand up toward the skin, allowing them to adhere closely to the skin. Thereby, a gap is formed between each hollow rolled-in three-dimensional part and the crotch part, and leakage of liquid excrement from the gap can be further suppressed. As a result, while ensuring the touch against the skin, the pair of hollow rolled-in three-dimensional parts can more appropriately guide liquid excrement to the absorbent body, thereby improving the absorption performance.

The absorbent article of the present invention (8) is the absorbent article according to the above (6) or (7), which has an end fixing portion by which the pair of hollows are rolled into each of the three-dimensional portions. The front and rear ends in the longitudinal direction are fixed to the front and rear portions of the inner end of the corresponding side sheet in the pair of side sheets. In the width direction, the end fixing portions are located farther apart. The two end edges of the surface sheet may be further outside. This absorbent article has a fixing portion that fixes the front and rear ends of the hollow rolled-in three-dimensional portion to the front and rear portions of the inner end of the side sheet, and the fixing portion is located farther than the surface sheet. The terminal edge is further outside. That is, the end regions on both sides of the surface sheet and the central portion in the longitudinal direction sandwiched between the two thighs of the pair of hollow rolled three-dimensional parts are not hindered from standing up, and the pair can be fixed. The hollow rolls in both ends of the three-dimensional part in the longitudinal direction. This can further prevent the hollow rolled-in three-dimensional parts from being bent downward when sandwiched between the thighs, that is, the liquid excrement that reaches the hollow rolled-in three-dimensional parts is transferred to the thighs. The situation leaking from the lower side.

The absorbent article of the present invention (9) is the absorbent article according to any one of the above items (6) to (8), further comprising the surface sheet and the absorbent body formed in the thickness direction. The pair of pressed parts in the overlapping area may each reach a position deeper than the joint part on the non-skin surface side from the position of the surface sheet in the thickness direction. In this absorbent article, each of the pair of pressing parts is formed deeper on the non-skin surface side than the joint part. Therefore, during use, the user's thighs of both feet hold the absorbent article in the width direction, and when the absorbent body deforms along the shape of the user's crotch, the central portion of the absorbent body in the width direction can be (Excretion port contact region) is convexly deformed toward the skin side so as to contact the excretion port. This not only ensures the skin touch of the absorbent article, but also improves the fit, and can properly guide liquid excrement to the absorbent body, thereby improving the absorption performance.

The absorbent article of the present invention (10) is the absorbent article according to any one of the above items (1) to (5), further comprising: each of the two ends corresponding to the width direction of the auxiliary sheet. It is provided that a pair of side sheets are located on the skin side of the two ends, and the pair of side sheets has: a pair of side sheets corresponding to each of the pair of side sheets, and is located between the side sheets of the pair of side sheets. A pair of three-dimensional frills with two opposite ends on the inside in the width direction. Each of the pair of three-dimensional frills has the outer end in the width direction as a fixed end, and the inner end of the pair of three-dimensional frills. The end portion serves as a free end, and the surface sheet is located between the fixed end of one of the pair of three-dimensional hems in the width direction and the fixed end of the other of the pair of three-dimensional hems. The aforementioned fixed ends on both sides can also be positioned far away from each other. In this absorbent article, the surface sheet is positioned between a pair of fixed ends of a pair of three-dimensional frills. Therefore, the pair of three-dimensional frills can prevent liquid excretion from being transmitted from the surface sheet to the side sheets and leaking sideways when body pressure is exerted on the surface sheet. In addition, even if liquid excrement accumulates in the end areas on both sides of the surface sheet and leaks from there, since the pair of three-dimensional frills are separated from the surface sheet, they can be exposed at the separated positions. The auxiliary sheet can absorb liquid excrement, so it can further suppress the side leakage of liquid excrement. This ensures an absorbent feel and can properly guide liquid excrement to the absorbent body, thereby improving absorption performance.

The absorbent article of the present invention (11) is the absorbent article according to the above (10), further comprising an end fixing portion that connects the front of each of the pair of three-dimensional hems in the longitudinal direction. and the rear end portions are fixed to the front and rear portions of the inner end portions of the corresponding side sheets in the pair of side sheets, and in the width direction, the end fixing locations are farther from both ends of the surface sheet. The edge can also be further outside. This absorbent article has an end fixing portion that fixes the front and rear ends of the three-dimensional hems to the front and rear portions of the inner end of the side sheet, and the end fixing portion is at an end of the surface sheet. The edge is further outside. That is, neither the end regions on both sides of the surface sheet nor the standing of the pair of three-dimensional hems are hindered, and both ends in the longitudinal direction of the pair of three-dimensional hems can be fixed. Thereby, it is possible to further suppress the collapse of each three-dimensional ruffle to the outside, that is, to further suppress the side leakage of liquid excrement reaching each three-dimensional ruffle.

The absorbent article of the present invention may be (12) the absorbent article according to any one of (1) to (11) above, wherein the surface sheet may contain water-retentive fibers. In this absorbent article, since the surface sheet contains water-retentive fibers, the surface sheet can have a good touch against the skin.

The absorbent article of the present invention (13) is the absorbent article according to the above (12), wherein the surface sheet has an excretion opening contact region in the central region, and the excretion opening contact region contains weakly water-repellent oil. Agents are also available. In this absorbent article, the excretion opening contact region in the surface sheet containing water-retentive fibers has weak water repellency. Therefore, the surface sheet suppresses the diffusivity of the water-retentive fibers and allows high-viscosity body fluids to easily migrate toward the absorbent body from the plurality of holes. Therefore, while the surface sheet as a whole has a good skin feel, it is possible to improve the absorption performance in the area in contact with the excretion port.

According to the present invention, there is provided an absorbent article that not only improves skin touch but also enhances absorption performance.

The absorbent article according to the embodiment will be described taking a sanitary napkin as an example. However, the types and uses of the absorbent articles of the present invention are not limited to such examples, and can be applied to other absorbent articles within the scope that does not deviate from the subject matter of the present invention. As for other absorbent articles, examples include sanitary pads, light incontinence pads, and disposable diapers.

(First Embodiment) FIGS. 1 to 2 are diagrams showing structural examples of a sanitary napkin 1 according to an embodiment. FIG. 1 is a plan view showing a state in which the sanitary napkin 1 is unfolded, and FIG. 2 is a cross-sectional view taken along line II-II in FIG. 1 . The sanitary napkin 1 of this embodiment has a longitudinal direction L, a width direction W, and a thickness direction T that are orthogonal to each other. In the sanitary napkin 1 shown in Figure 1, the upper and lower sides of the figure are respectively regarded as the front and rear sides in the longitudinal direction L, and the left and right sides are respectively regarded as the left and right sides in the width direction W. The front side and the deep side of the paper are respectively regarded as the upper side and the lower side of the thickness direction T. The sanitary napkin 1 has a longitudinal center line C _L (imaginary line) extending in the longitudinal direction L through the center of the longitudinal direction W, and a broad side extending in the transverse direction W through the center of the longitudinal direction L. Directional center line C _W (imaginary line). Let the direction toward the longitudinal center line _CL and the side toward the longitudinal center line be respectively regarded as the inward direction and the inner side of the width direction W, and the direction away from it and the side away from it shall be respectively regarded as the outward direction and the outer side of the width direction W. On the other hand, let the direction toward the width direction center line C _W and the side toward the width direction center line be respectively regarded as the inward direction and the inside direction of the longitudinal direction L, and the direction away from the direction and the far side are respectively regarded as the longitudinal direction L. outward and lateral. The sanitary napkin 1 placed on a plane including the longitudinal direction L and the width direction W when viewed from the upper side in the thickness direction T is called "top view", and the shape grasped in plan view is called "planar shape" . An arbitrary direction in a plane including the longitudinal direction L and the width direction W is called a "planar direction". When the sanitary napkin 1 is installed by the installer placed on it, the side that is relatively close to the wearer's skin surface in the thickness direction T and the side that is far away are called the "skin side" and the "non-skin side". These definitions can also be used commonly for various materials of sanitary napkins 1.

In this embodiment, the sanitary napkin 1 (excluding the wings) has a substantially rectangular shape that is long in the longitudinal direction L and short in the width direction W when viewed from above. However, the short sides at both ends in the long side direction L have a substantially semicircular shape. In addition, the shape of the sanitary napkin 1 is not particularly limited as long as it is long in the longitudinal direction L and short in the width direction W. Examples of the shape include a rounded rectangle, an oval, an oval, and an hourglass shape. In this embodiment, the sanitary napkin 1 is provided with a pair of flap portions 9 and 9 extending toward both outer sides in the width direction W from a substantially rectangular-shaped portion. The fin portion 9 has a substantially trapezoidal shape. However, the shape may be, for example, a semicircle or a semiellipse.

The sanitary napkin 1 includes a surface sheet 2, an auxiliary sheet 5, an absorbent body 4, a back sheet 3, and a fixing part 7. The surface sheet 2 is a liquid-permeable sheet, and constitutes the skin-side surface of the sanitary napkin 1 in this embodiment. The auxiliary sheet 5 is a liquid-permeable sheet, and is laminated on the non-skin side of the surface sheet 2 in this embodiment. The absorber 4 is made of liquid-absorbent and liquid-retentive material, 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 sanitary napkin 1 in this embodiment. The fixing part 7 is an adhesive that adheres the sanitary napkin 1 to the skin side of the underwear. In this embodiment, it is located on the surface of the back sheet 3 on the non-skin side. Therefore, in the sanitary napkin 1, the surface sheet 2, the auxiliary sheet 5, the absorbent body 4, the back sheet 3, and the fixing part 7 are laminated in this order in the thickness direction T.

In this embodiment, the sanitary napkin 1 further includes: a pair of side sheets 6, 6; and a pair of fixing parts 8, 8. The pair of side sheets 6 and 6 are hydrophilic sheets, and in this embodiment are located on both sides of the auxiliary sheet 5 in the width direction W. However, the pair of side sheets 6, 6 may be water-repellent sheets. The pair of fixing parts 8, 8 are adhesives that adhere the pair of flap parts 9, 9 to the non-skin side of the underwear. In this embodiment, they are located on the inner side of the pair of flap parts 9, 9. The non-skin side surface of sheet 3. In addition, the sanitary napkin 1 may further include an outer sheet on the non-skin side of the inner sheet 3 .

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. However, the short sides at both ends in the long side 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 2 a constitutes the skin-side surface of the surface sheet 2 . The non-skin side surface is connected to the skin side surface of the second fiber layer 2b. The non-skin side surface of the second fiber layer 2 b constitutes the non-skin side surface of the surface sheet 2 . Therefore, the surface sheet 2 has a two-layer structure. However, the surface sheet 2 may have a one-layer structure including either the first fiber layer 2a or the second fiber layer 2b, or may have a multi-layer structure including three or more layers of other fiber layers.

The auxiliary sheet 5 has a shape slightly larger in the width direction W than the surface sheet 2 . Therefore, the size in the width direction W of the auxiliary sheet 5 is larger than the size in the width direction W of the surface sheet 2 (the size in the width direction W of the surface sheet 2 is smaller than the size in the width direction W of the auxiliary sheet 5 ). . That is, when viewed from above, the two end edges 5E and 5E in the width direction W of the auxiliary sheet 5 are located outside the two end edges 2E and 2E in the width direction W of the surface sheet 2 . At this time, when using the sanitary napkin 1, the pair of flap portions 9, 9 are folded toward the non-skin side of the underwear, and the two end edges 5E, 5E of the auxiliary sheet 5 are smaller than the two end edges 2E of the surface sheet 2. , 2E is easier to contact the user's thighs first.

In this embodiment, the auxiliary sheet 5 has a substantially rectangular shape that is long in the longitudinal direction L and short in the width direction W. However, the short sides at both ends in the long side direction L have a substantially semicircular shape. Furthermore, the auxiliary sheet 5 is provided with a pair of ring portions (hollow rolled three-dimensional portions) 5L, 5L at both ends in the width direction W. The pair of ring portions 5L and 5L turn the two sides of the auxiliary sheet 5 in the width direction W toward the inside of the auxiliary sheet 5 in the width direction W and toward the non-skin side (lower side in the thickness direction T). Fold to form a ring. The ends of the two side portions of the folded auxiliary sheet 5 are located at the inner end portions of the pair of opposite side sheets 6, 6 by a line extending intermittently or continuously along the longitudinal direction L. The paired joining portions 18 and 18 (example: hot melt adhesive) are joined to each other. At this time, the outermost edge in the width direction W of the ring portion 5L becomes the end edge 5E. In addition, the ring portion 5L does not contain an elastic member. Therefore, the auxiliary sheet 5, the surface sheet 2, and the absorbent body 4 can be made less likely to shrink in the longitudinal direction L, thereby making it less likely to clog the holes and pores described below. In addition, the ends of both sides of the folded auxiliary sheet 5 are further connected to the non-skin side surface of the auxiliary sheet 5 by a pair of joint portions () extending intermittently or continuously along the longitudinal direction L. (Example not shown: hot melt adhesive) may be joined to each other.

In this embodiment, the surface sheet 2 and the auxiliary sheet 5 are bonded to each other using an adhesive (an example not shown: hot melt adhesive). The adhesive extends along the longitudinal direction L and is coated on 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 strip shape, an omega repeating shape, a wave repeating shape, and the like. The adhesive agent is applied in a substantially line-symmetrical area with respect to the longitudinal center line _CL .

The surface sheet 2 is divided into an area where the adhesive is applied in the predetermined pattern described above and an area where the adhesive is not applied outside the area. In this embodiment, the two end edges extending in the longitudinal direction L of the two end edges in the width direction W in the area where the adhesive is applied are defined as a pair of joint portion end edges 17 and 17 . At this time, the surface sheet 2 is divided in the width direction W into an area on and inside a pair of joint portion end edges 17 and 17 , that is, a central area where the adhesive is applied, and a pair of joint portions. The area outside the edge 17, 17 is the area of the pair of end portions to which the adhesive is not applied. Let the former be the central area CA and the latter be a pair of end areas EA, EA. Therefore, the surface sheet 2 has a central area CA located at the center in the width direction W, and a pair of end areas EA, EA adjacent to both outer sides of the central area CA in the width direction W. The central area CA is an area bonded to the auxiliary sheet 5 , and the pair of end areas EA and EA are areas not bonded to the auxiliary sheet 5 . Therefore, each of the pair of end areas EA and EA serves as a fixed end connecting the inner end edge in the width direction W to the end edge of the central area CA, and does not connect the outer end edge in the width direction W ( Except for both ends in the longitudinal direction L), which member is joined to the free end of which member. That is, the pair of end areas EA, EA are formed to stand up from the auxiliary sheet 5 . In addition, the end area EA is partially joined to the auxiliary sheet 5, the side sheet 6, and the absorber 4.

The central area CA and the pair of end areas EA, EA are line symmetrical with respect to the longitudinal center line _CL . The range of the width direction W of the central area CA in the surface sheet 2 is, for example, 70, which includes the size of the width direction W of the absorbent body 4 including the excretion port contact area XA and a pair of press parts 12, 12 (described later). ~96% range. If it is less than 70%, the end area EA in the width direction W of the surface sheet 2 will be rolled up and thickened, and a gap will be generated between the surface sheet 2 and the wearer's body except for the part where it is rolled up and thickened. , liquid excrement spreads to the skin of the user and easily leaks. If it exceeds 96%, the ends of the surface sheet 2 in the width direction W are closely connected by the joining of the surface sheet 2 and the auxiliary sheet 5, making it difficult for the pair of end areas EA and EA to stand up. In addition, the range in the width direction W of each of the pair of end areas EA and EA in the surface sheet 2 is the remaining portion excluding the central area CA.

In this embodiment, the absorber 4 has a substantially rectangular shape long in the longitudinal direction L when viewed from above. However, the absorber 4 has a substantially semicircular shape at both ends in the longitudinal direction L. The absorbent body 4 includes an absorptive core 4a and a core covering 4b covering the absorptive core 4a.

In this embodiment, a predetermined pattern of adhesive (example: hot melt adhesive) are joined. In the portion facing the auxiliary sheet 5, the pair of side sheets 6, 6, and the back sheet 3 on the non-skin side of the absorber 4, a predetermined pattern of adhesive (example: hot melt adhesive), heat The seal is joined to the inner sheet 3 .

When viewed from above, the sanitary napkin 1 has an excretion port contact area XA slightly forward of the center in the longitudinal direction L and in the center in the width direction W. The excretion port contact area XA is an area that faces or contacts the user's excretion port when the sanitary napkin 1 is used. The excretion port contact area XA is set according to the type and use of the absorbent article. For example, the excretion port contact area XA is slightly forward of the center of the absorbent body 4 in the longitudinal direction L, and is set to a length of about 1/4 to 1/2 of the entire length of the absorbent body 4, and is set to a length of about 1/4 to 1/2 of the entire length of the absorbent body 4, and is set to be slightly forward of the center of the absorbent body 4 in the width direction W. The approximate center of the body 4 is set to a width of approximately 1/3 to 1/2 of the full width of the absorbent body 4 . The sanitary napkin 1 has a longitudinal front area _AF , a longitudinal center area A _C , and a longitudinal rear area A _B in the longitudinal direction L. The longitudinal center area A _C includes the excretion port contact area XA. The longitudinal direction front area _AF includes the front end portion of the excretion port contact area XA in the longitudinal direction L, and is adjacent to the front end in the longitudinal direction L of the longitudinal center area A _C. The longitudinal rear area A _B includes the rear end portion of the excretion port contact area XA in the longitudinal direction L, and is adjacent to the rear end of the longitudinal central area A _C in the longitudinal direction L.

The central area CA of the surface sheet 2 has a plurality of holes. In this embodiment, the sanitary napkin 1 is provided with a plurality of point-shaped (circular) pressing parts in the central area CA, preferably in the longitudinal central area A _C , and more preferably in the excretion port contact area XA. 15. The point-shaped pressing portion 15 is formed by pressing the surface sheet 2 and the absorbent body 4 in a point-like manner in the thickness direction T. That is, the surface sheet 2, the auxiliary sheet 5, and the absorbent body 4 (the skin-side core covering 4b and the absorbent core 4a) are pressed in the thickness direction T. As a result, the surface sheet 2 is formed with recessed portions that are recessed in a dot-like manner toward the absorber 4 . In this embodiment, the recessed portion corresponds to the hole portion of the surface sheet 2 . However, the hole portion is not limited to this example. Other structures include, for example, holes (through holes) penetrating the absorber 4 from the surface sheet 2 due to punching, and fiber irregularities intentionally generated when the surface sheet 2 intersects. Consistent pores (voids). In addition, in this embodiment, although the shape of the press section 15 in plan view is circular, other shapes such as polygonal, elliptical, star-shaped, etc. may be used.

In this embodiment, the sanitary napkin 1 for sanitary use further includes a pair of press parts (press grooves) 12, 12, a pair of press parts (press grooves) 13, 13, and press parts (press grooves) 11, 14. The pair of pressing parts 12 and 12 are continuously or intermittently located here along the longitudinal direction L on both outer sides of the discharge port contact area XA in the width direction W, and the pair of pressing parts 13 and 13 are located on both sides of the discharge port contact area XA. The rear of the press sections 12 and 12 in the longitudinal direction L is located here continuously or intermittently along the longitudinal direction L. The pressing parts 11 and 14 are respectively located in front and behind the discharge port contact area XA in the longitudinal direction L. The pressing parts 11 to 14 press the surface sheet 2 (auxiliary sheet 5) and the absorbent body 4 (skin-side core covering 4b and absorbent core 4a) in the thickness direction T. Although the bottoms of the pressing parts 11 to 14 in the thickness direction T are located within the absorbent core 4a, they may reach the core covering 4b on the non-skin side. In this embodiment, although the shape of the press sections 11 to 14 in plan view is linear, other shapes such as polygon, circle, ellipse, star, or a collection of these may be used. In addition, at least one of the pressing sections 11 to 14 may be omitted.

The first fiber layer 2a contains water-retaining fibers, thereby making the surface sheet 2 feel good against the skin. The water-retentive fiber is not particularly limited as long as it has the property of absorbing and retaining water (water-retentive). Examples of water-retentive fibers include cellulose-based fibers. The cellulosic fiber is not particularly limited as long as it contains cellulose. Examples include natural cellulose fiber, regenerated cellulose fiber, refined cellulose fiber and semi-synthetic cellulose fiber. Examples of natural cellulose fibers include plant fibers, such as seed fiber (example: cotton), bast fiber (example: hemp), leaf vein fiber (example: abaca), and fruit fiber (example: coconut). ). Examples of cotton include American cotton (for example: upland cotton), island cotton, Asian cotton, and Arabian cotton. In addition, cotton may also be organic cotton or quasi-organic cotton (trademark). However, organic cotton refers to cotton certified by GOTS (Global Organic Textile Standard). Examples of regenerated cellulose fibers include rayon, for example: viscose rayon obtained from viscose fiber, copper ammonium rayon obtained from multicomponent rayon, modal fiber, and copper ammonium salt solution of cellulose. (also known as "cupro fiber") and other fibers. As for the refined cellulose fiber, lyocell fiber can be mentioned. Specifically, the paper pulp is dissolved in an aqueous solution of N-methylmorphine-N-oxide to make a spinning stock solution (spinning stock solution), and the spinning stock solution is extruded. It is put into a thin solution of N-methylmorphine-N-oxide to make fibers. Refined cellulose is sold, for example, as Tencel (trademark). Examples of semi-synthetic cellulose fibers include semi-synthetic cellulose, such as acetate fiber, and fibers such as tripolyacetate and dimer acetate. Among them, from the viewpoint of water retention and skin feel, natural cellulose fiber is ideal, cotton is more ideal, and American cotton is even more ideal. In this embodiment, the water-retaining fiber is American cotton (hereinafter, also referred to as "cotton" only.).

The second fiber layer 2b contains hydrophobic fibers and water-retaining fibers. The hydrophobic fiber is not particularly limited as long as it is hydrophobic. Examples of hydrophobic fibers include thermoplastic resin fibers. The thermoplastic resin fiber is not particularly limited as long as it contains a thermoplastic resin. Examples of thermoplastic resins include olefin-based resins such as polyethylene (PE), polypropylene (PP), ethylene-vinyl acetate copolymer (EVA), and polyethylene terephthalate ( Well-known resins include polyester-based resins such as PET) and polylactic acid (PLA), and polyamide-based resins such as 6-nylon. These resins may be used alone, or two or more types of resins may be used in combination. In addition, the structure of the fiber formed of this type of thermoplastic resin is not particularly limited, and examples thereof include composite fibers such as core-sheath type fiber, side-by-side type fiber, island/sea type fiber; hollow type fiber; flat, Y Fibers with special-shaped cross-sections such as glyphs and C-shapes; three-dimensional crimped fibers with latent crimp or explicit crimp; split fibers split by physical loads such as water flow, heat, embossing processing, etc., and have such characteristics The structural fibers may be used alone, or two or more types of fibers may be used in combination. In this embodiment, the hydrophobic fiber is a PET/PE core-sheath type composite fiber. The water-retentive fibers are the same as those of the first fiber layer 2a. The second fiber layer 2b contains water-retaining fibers, thereby making the surface sheet 2 feel good against the skin. In addition, "hydrophobicity" refers to a property that is difficult to be miscible with water or difficult to retain water. For example, the contact angle with ion-exchange water (example: specific resistance value 10MΩ･cm) is about 80° to 100°. By.

In this embodiment, the fibers constituting the first fiber layer 2a are not particularly limited. For example, the following characteristics can be obtained from the viewpoint of not adversely affecting the skin feel of the surface sheet 2. The proportion of the water-retentive fiber in the first fiber layer 2a is, for example, 70 to 100% by mass. The fiber length and average fiber length of the fiber are, for example, 10 to 80 mm and 15 to 60 mm. Examples of fibers other than the water-retaining fibers of the first fiber layer 2a include thermoplastic resin fibers, and the fiber length and average fiber length of the fibers can be approximately the same as those of the water-retaining fibers (in the range of 0.5 to 2 times). . The thickness of the first fiber layer 2a is not particularly limited, but may be 0.05 to 4 mm, for example.

In this embodiment, the fibers constituting the second fiber layer 2b are not particularly limited, for example, from the viewpoint of not adversely affecting the skin feel of the surface sheet 2 and the inhalation of liquid from the first fiber layer 2a. The following characteristics can be created. The proportion of the water-retentive fibers in the second fiber layer 2b may be, for example, 50 to 90% by mass, which is smaller than the proportion of the water-retentive fibers in the first fiber layer 2a. The fiber length and average fiber length of the fibers are, for example, 3 to 40 mm and 5 to 30 mm, which are shorter than the water-retentive fibers of the first fiber layer 2a. The fiber length and the average fiber length of the hydrophobic fibers of the second fiber layer 2b are, for example, 10 to 80 mm and 15 to 60 mm. The thickness of the second fiber layer 2b is not particularly limited, but may be 0.05 to 4 mm, for example.

In this embodiment, in the first fiber layer 2a and the second fiber layer 2b, the proportion of water-retentive fibers among the fibers constituting the first fiber layer 2a is larger than the proportion of water-retentive fibers among the fibers constituting the second fiber layer 2b. for ideal. That is, the surface sheet 2 can be made to have a good skin feel. Moreover, in the first fiber layer 2a and the second fiber layer 2b, the average fiber length of the water-retentive fibers of the second fiber layer 2b is shorter than the average fiber length of the water-retentive fibers of the first fiber layer 2a, and the second fiber It is ideal that the average fiber lengths of the hydrophobic fibers in layer 2b are at the same level, and that the basis weights of the two fiber layers are at the same level. Thereby, the fibers constituting the second fiber layer 2b are brought closer to each other, that is, the distance between the fibers is shortened, the capillary phenomenon is generated more strongly, and the liquid excretion in the first fiber layer 2a can be strongly attracted to the second fiber. Layer 2b. In addition, the fiber density of the second fiber layer 2b is more ideal than the fiber density of the first fiber layer 2a. In addition, the fiber density is the density of the number of fibers. Thereby, a gradient of fiber density is formed such that the fiber density becomes higher from the first fiber layer 2a toward the second fiber layer 2b, and the liquid excretion in the first fiber layer 2a can be strongly attracted to the second fiber layer 2b. Furthermore, the auxiliary sheet allows the liquid excrement to move stably to the non-skin side in contact with the second fiber layer 2b.

In this embodiment, the auxiliary sheet 5 is not particularly limited as long as it is liquid-permeable. For example, a non-woven fabric with liquid permeability, such as a non-woven fabric with hydrophobic fibers, among which thermoplastic resin fibers are appropriately used. of nonwoven fabric. In addition, when the surface sheet 2 is made of water-retentive fiber, preferably cellulose-based fiber, more preferably containing cotton, the auxiliary sheet 5 corresponds to this. The water-retentive fiber may be, for example, cellulose-based fiber, more preferably containing cotton. In the sanitary napkin 1 having such a structure, water-retentive fibers with high liquid diffusivity and the like are connected from the first fiber layer 2a of the surface sheet 2 to the auxiliary sheet 5 via the second fiber layer 2b. Therefore, the liquid diffusion of liquid excrement caused by these fibers can make the liquid excrement move from the surface sheet 2 to the absorbent body 4 through the auxiliary sheet 5 more stably, so that the skin of the surface sheet 2 can be touched. It feels good and improves absorption performance.

In this embodiment, the absorbent core 4a of the absorbent body 4 is not particularly limited as long as it has liquid absorbency and liquid retention properties. Examples thereof include a liquid retention material containing water-absorbent fibers such as pulp fibers. , water-absorbent materials such as super absorbent polymer (SAP). The core covering layer 4b is not particularly limited as long as the shape of the absorbent core 4a can be maintained. For example, a liquid-permeable sheet including a hydrophilic nonwoven fabric such as tissue paper can be used.

The side sheet 6 is not particularly limited, and examples thereof include a nonwoven fabric treated with water repellency and a breathable synthetic resin film. In addition, the back sheet 3 is not particularly limited, but examples thereof include liquid-impermeable nonwoven fabrics, synthetic resin films, and composite sheets thereof. In this embodiment, the flap portion 9 is formed of the side sheet 6 and the back sheet 3 .

The above-mentioned sanitary napkin 1 does not open and close according to the movement of the user's body, but has a plurality of holes (in this embodiment, a plurality of pressing parts 15) that are opened from the beginning. Here, the hole part (pressed part 15) is a recessed part or a part penetrating the opposite side in the surface sheet 2, that is, it includes a recessed part or a through hole caused by pressing. Such a hole portion (pressing portion 15) can suppress changes in the shape of the hole portion (pressing portion 15) regardless of the movement of the user's body. Thereby, when the sanitary napkin is used, irritation such as friction to the user's skin around the hole portion (pressing portion 15) can be reduced, thereby improving the skin feel felt by the user. Furthermore, the center area CA side of the surface sheet 2 is joined to the auxiliary sheet 5 and has a plurality of hole portions (pressing portion 15). Thereby, when the sanitary napkin is used, liquid excretion can be quickly transferred from the plurality of holes (pressed portion 15) of the surface sheet 2 to the absorbent body 4 via the auxiliary sheet 5. That is, liquid excrement can be efficiently absorbed through the hole portion (pressing portion 15). In addition, at this time, since the auxiliary sheet 5 has a larger shape in the width direction W than the surface sheet 2, the both end edges 5E, 5E of the auxiliary sheet 5 are located at the both end edges 2E, 2E of the surface sheet 2. outside. Thereby, when the sanitary napkin is used, the two end edges 5E, 5E of the auxiliary sheet 5 are brought into contact with both thighs earlier than the two end edges 2E, 2E of the surface sheet 2 in the width direction W, and the side edges will be assisted. The sheet 5 is compressed inward and can be deformed to bulge upward (in the direction of the excretion port). Thereby, the pair of end areas EA and EA placed on the auxiliary sheet 5 without being joined to the auxiliary sheet 5 are deformed to stand upward (in the direction of the excretion port), thereby making it possible to It functions as a pair of walls. This can prevent liquid excretion from spreading outward in the width direction W and reaching the pair of end areas EA, EA. That is, it is possible to reduce the contact of liquid excreta with the user's skin when viewed from above, thereby reducing the burden on the user's skin. In this way, sanitary napkins 1 for menstrual use not only improve the skin feel, but also improve the absorption performance.

3 and 4 are diagrams showing structural examples of pores of the surface sheet according to the embodiment. FIG. 3 shows an electron micrograph of an example of pores, and FIG. 4 shows a schematic diagram of an end portion in the width direction W in an example of the structure of the surface sheet. As illustrated in FIG. 3 , the central area CA and the pair of end areas EA and EA of the surface sheet 2 have a plurality of pores 21 . In the pores 21, for example, the dimension a (μm) in the width direction W is 100 μm to 5 mm, and the dimension b (μm) in the longitudinal direction L is 100 μm to 5 mm.

The surface sheet 2 is formed by interlacing fiber networks. In this embodiment, the fiber web for the first fiber layer 2a of the surface sheet 2 and the fiber web for the second fiber layer 2b are entangled and joined to each other by water flow. As for the communication method caused by water flow, for example, water acupuncture or water jetting can be used. Appropriately adjust the conditions of the water flow during interlacing; the shape of the drum (roller) and the concave and convex on the bottom plate (belt) for arranging the entangled sheet; the conveying speed of the interlaced sheet; the tension in the conveying direction MD, etc., etc., can be adjusted on the surface sheet 2 A desired plurality of pores 21 are formed. However, the interlacing method of the fibers constituting the surface sheet 2 is not limited to this example, and other interlacing methods, such as air-induced interlacing using a hot air method, are also possible.

In this embodiment, in plan view, the area of each of the pores 21 present in the central region CA is larger than the area of each of the pores 21 present in the pair of end regions EA, EA. As shown in FIG. 4(a) , in plan view, the end edges 2E in the width direction W (the end edges 2E in the width direction W of the surface sheet 2 ) in each of the pair of end regions EA and EA, Among the plurality of pores 21 , there are pores 21 a with chamfered corners in the portion formed by cutting the surface sheet 2 . Furthermore, the recessed portion 22 is formed by the pores 21a. The recess 22 is dented inward in the width direction W, for example by at least a length d0. Therefore, the uneven shape 23 is formed in the end edge 2E by the plurality of recessed portions 22 formed by the plurality of pores 21a. At this time, the degree of the concavity and convexity of the concave and convex shape 23, that is, the degree of depression of the recessed portion 22 is about the length d0. Here, in the sanitary napkin 1 of this embodiment, the area of the pores 21 present in each of the pair of end regions EA, EA is relatively reduced in plan view as described above. Therefore, the size (length d0) of the plurality of recessed portions 22 caused by the plurality of pores 21a present in the end edge 2E can be relatively reduced, and therefore the degree of the unevenness of the uneven shape 23 can be relatively reduced. Thereby, the frictional irritation to the user's skin caused by the uneven shape 23 of the edge 2E of the surface sheet 2 can be reduced, thereby improving the skin feel. At the same time, the area of each pore 21 present in the central area CA of the surface sheet 2 is relatively increased in plan view. Therefore, liquid excrement can be quickly transferred from the plurality of pores 21 of the surface sheet 2 to the absorbent body 4 through the auxiliary sheet 5, and the absorption performance can be improved. In this way, sanitary napkins 1 for menstrual use not only improve the skin feel, but also improve the absorption performance.

In this embodiment, when viewed from above on the surface sheet 2, the area of the pores 21 in the central area CA and the pair of end areas EA, EA is 0.01 mm ² or more and 25 mm ² or less. In the sanitary napkin 1, since the area of the pores 21 in the central area CA and the pair of end areas EA and EA is 0.01 mm ² or more, the effect of allowing liquid excrement to pass through is increased, and the absorption performance can be improved. . In addition, since the area of the pores 21 is 25 mm ² or less, the unevenness of the uneven shape 23 caused by the presence or absence of the pores 21 can be suppressed from being excessively large, and frictional irritation to the user's skin can be reduced, thereby improving the Skin touch. The area of the pores 21 is more preferably 1 mm ² or less. If the pores 21 are large, the user may mistake the sanitary napkin 1 for an open product, that is, it may be mistaken for a defective product. However, by narrowing the pores 21, this possibility can be eliminated. Therefore, while ensuring the function of the pores 21, the user's anxiety about the appearance can be eliminated.

In this embodiment, the shape of the pores 21 existing in the pair of end regions EA, EA is such that the dimension dW in the width direction W is shorter than the dimension dL in the longitudinal direction L when viewed from above. As shown in FIG. 4(b) , in the sanitary napkin that does not exist in this embodiment, when viewed from above, the end edge 2Ex in the width direction W in the end region EA of the surface sheet 2x (the width of the surface sheet 2x Among the plurality of pores 21x at the end edge 2Ex in the direction W, there are pores 21ax with chipped corners in the portion formed by cutting the surface sheet 2x. Furthermore, the recessed portion 22x is formed by the pores 21ax. The recessed portion 22x is dented inward in the width direction W, for example by at least the length d0x. Therefore, the uneven shape 23x is formed in the edge 2Ex by the plurality of recessed portions 22x formed by the plurality of pores 21ax. At this time, the degree of unevenness of the uneven shape 23x, that is, the degree of depression of the recessed portion 22x is approximately the length d0x (>d0). However, the shape of the pores 21x is such that the dimension dWx in the width direction W is longer than the dimension dLx in the longitudinal direction L. Therefore, when viewed from above, the number of pores 21ax existing in a portion of the edge 2Ex in the width direction W of the surface sheet 2x is increased, and the pores 21ax formed in a portion of the edge 2Ex of the surface sheet 2x are not beveled. The degree of unevenness in the side direction W becomes larger. On the other hand, in the sanitary napkin 1 of this embodiment, the shape of the pores 21 present in the end region EA of the surface sheet 2 has a shape that is long relative to the longitudinal direction L when viewed from above. Therefore, when viewed from above, the number of pores 21 a existing in a portion of the edge 2E in the width direction W (of the end region EA) of the surface sheet 2 can be reduced, and the number of pores 21 a can be reduced. The degree of unevenness in the width direction W formed by the partially beveled pores 21a. Thereby, when the pair of end areas EA, EA of the surface sheet 2 stand up toward the skin side, the frictional stimulation of the surface sheet 2 to the user's skin can be reduced, thereby improving the skin feel.

However, the area and shape of the pores 21 are measured using the following method. (1) Cut out the surface sheet 2 with a size of 40 mm×40 mm as a sample. (2) Using a scanning electron microscope FlexSEM1000 manufactured by Hitachi Advanced Technologies Co., Ltd., an image was captured from the surface of the surface sheet 2 (first fiber layer 2a) at a shooting magnification of 37 times and a measurement area of 22.25 mm in length × 36.25 mm in width. At this time, images were taken five times from the surface at a depth of 0 μm. (3) From each obtained image, determine the areas where fibers do not exist and obtain the area, dL, and dW. Then, the average of five times was used as the area, dL and dW of the pores 21 .

In this embodiment, the surface sheet 2 is formed of a nonwoven fabric, and among the fibers constituting the nonwoven fabric, the fibers in the end regions EA are oriented in the longitudinal direction L more than the fibers in the central region CA. That is, in the width direction W, in the surface sheet 2, the fibers in the central region CA are relatively oriented in the longitudinal direction L, and the fibers in both end regions EA and EA are relatively oriented in the longitudinal direction L. In the sanitary napkin 1 with such a structure, the fiber orientation in the central area CA of the surface sheet 2 formed of nonwoven fabric is relatively irregular, so that the liquid excretion discharged into the central area CA can be approximately in concentric circles. spread across the board. At the same time, the fibers of the end areas EA and EA on both sides are relatively oriented in the long side direction L, so that the liquid excreta reaching the end areas EA and EA on both sides can be diffused in the long side direction L. That is, the sanitary napkin 1 can be used as a whole, and the absorption performance can be improved. Furthermore, in the end regions EA and EA on both sides of the surface sheet 2, the fiber roots are exposed toward the outside in the width direction W from the end edges 2E and 2E on both sides by orienting the fibers in the longitudinal direction L. The number is reduced, so the friction on the skin is reduced and the decrease in skin feel can be suppressed.

This embodiment further includes a pair of side sheets 6, 6 provided corresponding to each of the two ends in the width direction W of the auxiliary sheet 5 and located on the non-skin side of the two ends. The auxiliary sheet 5 has both ends corresponding to the width direction W of the auxiliary sheet 5 , and constitutes a pair of ring portions (hollow roll-in) that wrap the two ends on the non-skin surface side of the auxiliary sheet 5 Three-dimensional part) 5L, 5L. In each of the pair of ring portions 5L, 5L, the end portion in the width direction W of the auxiliary sheet 5 is the wide side of the end portion of the corresponding pair of side sheets 6, 6 that is joined to the end portion of the corresponding pair of side sheets 6, 6 by the joint portion 18 The inner end in direction W. The sanitary napkin 1 having such a structure has a pair of loop portions 5L, 5L (hollow rolled-in three-dimensional portions). Therefore, during use, the user's thighs of both feet hold the sanitary napkin 1 in the width direction W, and when the absorbent body 4 is deformed along the shape of the user's crotch, the pair of loop portions 5L, 5L can easily deform following the deformation of the absorber 4. That is, the pair of ring portions 5L and 5L stand up toward the skin side between the user's two thighs and can be in close contact with the skin. Thereby, a gap is formed between each ring portion 5L and the crotch portion, and leakage of liquid excrement from the gap can be suppressed. As a result, the skin touch is ensured, and in addition to the pair of end areas EA, EA, the pair of ring portions 5L, 5L can be used to appropriately guide liquid excreta to the absorbent body 4, thereby further improving the absorption performance. . Furthermore, when fibers that are easily loosened, such as water-retentive fibers (example: cotton), are used as the surface sheet 2, the two end edges 2E and 2E in the width direction W of the surface sheet 2 will rub, causing the water-retentive fibers to come out of the surface. There is a concern that the two end edges 2E, 2E in the width direction W of the sheet 2 may loosen and fall off. However, since the two end edges 5E and 5E of the pair of ring portions 5L and 5L are located outside the two end edges 2E and 2E of the surface sheet 2, friction between the two end edges 2E and 2E can be further suppressed. This can suppress the decrease in skin feel. In addition, the force received from the thigh can be flexibly received by the cushioning effect of the pair of ring portions 5L, 5L. It can make the user's skin feel better.

In this embodiment, when viewed from above, the size of the portion further outside the joint portion 18 of each of the pair of ring portions (hollow rolled three-dimensional portions) 5L, 5L in the width direction W is compared with the size of the pair of ends. The size of the outer portion of the joint portion 18 in each of the bottom areas EA and EA is larger. In the sanitary napkin 1 having such a structure, the length (dimension) in the width direction W in the loop portion (hollow rolled-in three-dimensional portion) 5L becomes larger than the length (dimension) in the width direction W in the end region EA. longer. This is because the pair of ring portions 5L, 5L are sandwiched between the two thighs and stand firmly toward the skin, so that they can be closely attached to the skin. Thereby, a gap is formed between each ring part 5L and the crotch part, and leakage of liquid excrement from the gap can be suppressed. As a result, the pair of loop portions 5L and 5L can be used to properly guide liquid excrement to the absorbent body while ensuring the touch against the skin, thereby further improving the absorption performance.

In the present embodiment, the sanitary napkin 1 has an end fixing portion 19 that secures the front and rear ends in the longitudinal direction L of each of a pair of loop portions (hollow rolled-in three-dimensional portions) 5L, 5L. It is fixed to the front and rear parts of the inner end of the corresponding side sheet 6 among the pair of side sheets 6, 6. In the width direction W, the end fixing portion 19 is located further outside than both end edges 2E of the surface sheet 2 . The end fixing portion 19 can be formed by bonding with an adhesive such as a hot melt adhesive or bonding with a heat seal. Moreover, each of the pair of ring parts (hollow rolled three-dimensional parts) 5L and 5L may be joined to the absorber 4 . In the sanitary napkin 1 having such a structure, the front and rear ends of the loop portion (hollow rolled three-dimensional portion) 5L are fixed to the ends of the front and rear portions of the inner end of the side sheet 6 The portion 19 is located further outside than the two end edges 2E, 2E of the surface sheet 2. Therefore, the center portion in the longitudinal direction L sandwiched between the two thighs of the pair of end areas EA, EA and the pair of ring portions 5L, 5L on both sides of the surface sheet 2 is not hindered. When standing, both ends of the pair of ring portions 5L and 5L in the longitudinal direction L can be fixed. This can further suppress the bending of each ring portion 5L downward when sandwiched between the thighs, that is, the liquid excretion reaching each ring portion 5L is transmitted to the thighs and leaks downward. state of affairs.

In this embodiment, a pair of press parts 12 and 12 are further provided in the thickness direction T and are formed in a region where the surface sheet 2 and the absorber 4 overlap. In the thickness direction T, the pair of pressing parts 12 and 12 reaches a position deeper than the pair of joint parts 18 and 18 from the position of the surface sheet 2 to the non-skin surface side. In the sanitary napkin 1 having such a structure, the pair of pressing portions 12 and 12 are formed deeper to the non-skin surface side than the pair of joining portions 18 and 18 . Therefore, during use, the user's thighs of both feet are used to hold the sanitary napkin 1 in the width direction W. When the absorbent body 4 is deformed along the shape of the user's crotch, the width of the absorbent body 4 can be adjusted. The central portion in the side direction W (excretion port contact area XA) is convexly deformed toward the skin side so as to contact the excretion port. Thereby, the skin touch of the sanitary napkin 1 is ensured, and the fit is improved, liquid excrement can be properly guided to the absorbent body 4, and the absorption performance can be improved.

In this embodiment, the surface sheet 2 may contain a weakly water-repellent oil agent in the excretion port contact area XA of the central area CA. Here, examples of the weakly water-repellent oil agent include the blood modifying agent described in Japanese Patent Application Laid-Open No. 2013-081772. In the sanitary napkin 1 with such a structure, especially when the surface sheet 2 contains water-retaining fibers, since the excretion port contact area High-viscosity liquid excrement easily migrates from the plurality of pores 21 to the absorbent body 4 . Therefore, while the surface sheet 2 as a whole has a good skin feel, it is possible to improve the absorption performance in the excretion port contact area XA.

In this embodiment, the surface sheet 2 may have an uneven structure. For example, at least the first fiber layer 2a has a plurality of convex portions extending continuously along the longitudinal direction L and spaced apart in the width direction W, and extending continuously along the longitudinal direction L so as to be adjacent to each other. A plurality of concave parts between the convex parts can also be used. In this case, each of the plurality of convex portions may be formed solid. If each of the plurality of convex parts is formed solid in this way, each convex part is less likely to collapse, and the liquid migration property from the convex part that is easily in contact with the user's body to the absorber 4 is excellent, so that the convex part can be improved. The dryness of the surface.

The ratio of fiber types in a sheet such as a fiber layer is measured as follows. That is, water-retentive fibers and hydrophobic fibers are colored with different colors to measure the ratio of fiber types. (1) Cut out the surface sheet 2 with a size of 70 mm×70 mm as a sample. (2) By coloring using the fiber identification reagent (KayastainQ) (Japanese Color Dyeing Co., Ltd.), only the water-retaining fibers are dyed blue, and only the hydrophobic fibers are dyed yellow. (3) Using a digital microscope VHX-100 manufactured by Nippon Keynes Co., Ltd., measure the ratio of blue to yellow when viewed from the skin side of the sample (first fiber layer 2a) in a range of 50 mm × 50 mm, as the first fiber Proportion of fiber types in layer 2a. On the other hand, the ratio of blue to yellow when viewed from the non-skin surface (second fiber layer 2b) was measured in the range of 50 mm×50 mm, and was used as the ratio of fiber types in the second fiber layer 2b.

In addition, the distance between fibers in a sheet such as a fiber layer is measured according to the following measurement method. (1) Cut out the surface sheet 2 with a size of 10 mm×10 mm as a sample. (2) Using a digital microscope VHX-100 (lens VH-Z20R + variable illumination accessory VH-K20) manufactured by Keynes Co., Ltd., with a shooting magnification of 200 times and a measurement area of 1300 μm in length × 1735 μm in width, from the surface of the sheet 2 Images are captured on each side of the surface (first fiber layer 2a) and the back surface (second fiber layer 2b). At this time, a total of five images are taken for every 20 μm of depth in the depth range of 0 to 100 μm for each surface and back surface. (3) From each obtained image, determine the area of the portion where fibers do not exist. At this time, the presence or absence of fibers in the pixel is determined based on whether the brightness of each pixel in each obtained image is lower or higher than a predetermined brightness (threshold), and the shooting area in each image is determined. The presence or absence of fiber within. However, only in areas where fibers do not exist, light is transmitted and bright, that is, the brightness becomes high. By this, the area of the portion where fibers do not exist in the imaging area is obtained. (4) The void ratio is calculated by dividing the area of the acquired portion where fibers do not exist by the area of the imaging area (measurement area). The calculation is performed on the image for every 20 μm in depth, and five void ratios are calculated. (5) Calculate the average of the five void ratios to determine the void ratios on each surface of the surface sheet 2 (first fiber layer 2a) and back surface (second fiber layer 2b). Comparing the size of the void ratio can determine the size of the distance between fibers. That is, when the void ratio is large, the distance between fibers can be made to appear large. For example, on the surface of the surface sheet 2, that is, on the skin side (the first fiber layer 2a: for example, Cotton 100% side), the void ratio is 25.4%, and on the inside, that is, on the non-skin side (the second fiber layer 2b) :For example, the surface of Cotton 60% + synthetic fiber 40%) has a void rate of 24.5%.

In addition, the fiber length and average fiber length of sheets such as fiber layers are based on "A7.1 Measurement of fiber length" of Appendix A of JIS L 1015:2010. Standard method) Measure the length of each fiber on a graduated glass plate. In addition, the above method is equivalent to the test method of ISO 6989 issued in 1981.

In addition, the basis weight of sheets such as fiber layers is measured according to the following measurement method. Make one fiber layer, cut out a 5cm×5cm fiber layer as a sample, dry it in an environment above 100°C, and measure the mass. Next, the basis weight of the sample is calculated by dividing the measured mass by the area of the sample. The basis weight of the 10 samples was averaged as the basis weight of the sheet.

In addition, the thickness of thin sheets such as fiber layers is measured according to the following measurement method. A digital microscope VHX-100 manufactured by Nippon Keynes Co., Ltd. was used to capture an enlarged image from the vertical direction of the cross section of the surface sheet 2 . The enlarged image is an image obtained by enlarging the entire thickness direction T of the surface sheet 2 to a magnification that can be captured. The magnification magnification is, for example, 20 to 50 times. The thickness of each fiber layer was measured on the 2D image converted from the obtained 3D image. The thickness of the surface sheet 2 was determined as the average value of the thicknesses measured at three separate sections.

The fiber density of a sheet such as a fiber layer is measured, for example, by the following measurement method. (1) Cut out the surface sheet 2 with a size of 10 mm×10 mm as a sample. (2) Use a scanning electron microscope (JCM-5100 manufactured by JEOL Ltd.) to magnify and observe the cross-section parallel to the thickness direction T of the sample. The magnification is set so that the cross sections of 30 to 60 fibers can be measured in one screen (example: 150 to 500 times). (3) Divide the observation area into three equal parts in the thickness direction T: the skin side layer, the middle layer, and the non-skin side layer. Let the skin side layer be the first fiber layer 2a, and the non-skin side layer. After forming the second fiber layer 2b, the number of fiber cross-sections in each fiber layer was measured. That is, the number of fiber sections cut in a predetermined area of the cut surface is calculated. (4) The number of fiber cross-sections obtained was converted into the number of fiber cross-sections per 1 mm ² , and this was regarded as the fiber density (fibers/mm ² ). The measurement was performed at three locations, and the average value of the measured values was used as the fiber density of the sample. That is, the density of the number of fibers is used as the fiber density. In other words, the number of fibers per unit area in the cross section parallel to the thickness direction T is used as the fiber density. In addition, the number of fibers per unit volume may also be used as the fiber density. The number of fibers per unit volume can be determined by analysis using X-ray CT, for example. Although the fiber density per unit area and the fiber density per unit volume have different numerical values, the relative comparison (for example: size comparison) of the fiber densities between fiber layers is the same.

Next, an example of the manufacturing method of the sanitary napkin 1 of this embodiment is demonstrated.

FIG. 5 is a schematic diagram showing a structural example of the manufacturing apparatus 300 of the sanitary napkin 1 , and FIG. 6 is a diagram schematically explaining a method of manufacturing the sanitary napkin 1 . The manufacturing apparatus 300 has a conveyance direction MD, a transverse direction CD, and an up-down direction TD for conveying materials such as sheets and semi-finished products. In this embodiment, the longitudinal direction, the width direction, and the thickness direction of the material and semi-finished product are all the same as the conveyance direction MD, the transverse direction CD, and the up-down direction TD.

First, the second fiber web P11 corresponding to the second fiber layer 2b is formed by the first card 110. The first card 110 is a dry roller card using a single card or a double card generally used for forming fiber webs. The second fiber web P11 contains water-retaining fibers and hydrophobic fibers. The second fiber web P11 is conveyed in the conveying direction MD by a conveying device (not shown). Next, the second carding machine 120 forms the first fiber web P12 corresponding to the first fiber layer 2a. The second card 120 is also a dry roller card similar to the first card 110 . The first fiber web P12 contains water-retentive fibers. The first fiber web P12 is laminated on the second fiber web P11 being conveyed in the conveyance device. Thereby, a composite fiber web P13 with a two-layer structure in which the first fiber web P12 and the second fiber web P11 are laminated is formed. In addition, the ratio of each fiber in each fiber web can be controlled by the ratio of raw fibers supplied to each carding machine.

Next, the composite fiber web P13 having a two-layer structure is subjected to water jet treatment by the water jet treatment machine 130, so that the fibers are intertwined with each other. Thereby, the first continuous sheet (water-needle nonwoven fabric) P14 is formed. Here, in the water jet treatment, the composite fiber web P13 is placed on a continuously moving mesh belt, and high-pressure jet water is sprayed from the upper side of the composite fiber web P13 to entangle fibers with each other. The properties of the first continuous sheet P14 obtained by the water jet treatment can be determined according to the quality of each fiber web, the hole diameter of the jet nozzle, the number of holes (pitch) of the jet nozzle, the passing speed of the fiber web, and the uneven shape of the mesh belt. Wait for appropriate adjustments and changes. Afterwards, the first continuous sheet P14 passing through the water jet processor 130 is dried by the dryer 140 . The dried first continuous sheet P15 is conveyed in the conveying direction MD by the conveying device.

In addition, the method of forming the fiber web corresponding to each fiber layer is not limited to the above-mentioned method, and for example, a wet method can be used. The interlacing method of the fabric is not limited to the above-mentioned methods, and for example, the water flow interlacing method, the hot air method, the needle punching method, etc. can be used. In addition, the first continuous sheet P15 may be manufactured in a manufacturing factory different from the manufacturing factory of the sanitary napkin 1, and may be supplied to the manufacturing factory of the sanitary napkin 1 in a rolled state.

Next, the first continuous sheet P16 that is the first continuous sheet P15 that is transported by a transport device (not shown) or wound back from a roller (not shown) is supplied to the forming device 210 . Here, the shaping device 210 is provided with shaping rollers 210a and 210b extending in the circumferential direction on the outer peripheral surface and having concave and convex portions meshing with each other. Furthermore, the first continuous sheet P16 is sandwiched by the uneven portions of the shaping rollers 210a and 210b, and is provided with an uneven structure extending in the conveyance direction MD. It can also be heated during shaping. Thereby, the continuous surface sheet P16 for the surface sheet 2 is formed.

Next, the continuous auxiliary sheet AS for the auxiliary sheet 5 wound up from the material roll WR3 is supplied to the heating device 220 . Next, the continuous auxiliary sheet AS is subjected to heat treatment to restore bulk, and then is supplied to the coating device 302 . Furthermore, the continuous auxiliary sheet AS is coated with an adhesive (eg, hot melt adhesive) in a predetermined pattern (eg, spiral pattern) on one surface. Thereafter, the continuous auxiliary sheet AS and the continuous surface sheet P16 are supplied to the joining device 230, and are sandwiched between a pair of joining rollers 230a and 230b of the joining device 230 and joined. Thereby, as shown in FIG. 5(a) , a continuous surface sheet P17 is formed.

Next, the continuous surface sheet P17 is supplied to the coating device 303 . Furthermore, the continuous surface sheet P17 is applied and adhered in a predetermined pattern along the conveyance direction MD to the surface below the up-down direction TD of the continuous surface sheet P17 (the continuous auxiliary sheet AS) and at the end in the transverse direction CD. agent (example: hot melt adhesive). Next, the continuous surface sheet P17 is supplied to the ring forming device 240 . Furthermore, both end portions in the transverse direction CD of the continuous auxiliary sheet AS of the continuous surface sheet P17 are folded toward the central portion into a ring shape by a folding jig such as a guide plate of the ring forming device 240 . As a result, a pair of side portions ASL and ASL corresponding to a pair of ring portions 5L and 5L are formed on both sides of the continuous surface sheet P17 in the transverse direction CD. Thereby, as shown in FIG. 5(b), a continuous surface sheet P18 is formed.

Next, the continuous side sheet SS for the side sheet 6 wound back from the material roller WR4 is supplied to the cutting device 250 . Furthermore, the continuous side sheet SS is cut into two halves along the conveyance direction MD at the center position in the transverse direction CD, and forms a pair of adjacent continuous sheets in the transverse direction CD. Side sheets SSa, SSb. Thereafter, the pair of continuous side sheets SSa and SSb are supplied to the pair of coating devices 303a and 303b. Furthermore, each of the pair of continuous side sheets SSa and SSb has an adhesive (eg, hot melt adhesive) applied in a predetermined pattern (eg, stripe pattern) to the inner end portion in the transverse direction CD. Next, the pair of continuous side sheets SSa and SSb and the continuous surface sheet P18 are supplied to the joining device 260 and are sandwiched between a pair of joining rollers 260 a and 260 b of the joining device 260 and joined. Thereby, the pair of side portions ASL, ASL and the pair of continuous side sheets SSa, SSb in the continuous surface sheet P18 are respectively joined. Thereby, as shown in FIG. 5(c), a continuous surface sheet P2 is formed.

Next, the continuous surface sheet P2 is supplied to the coating device 305, and an adhesive (eg, hot melt adhesive) is applied in a predetermined pattern on the surface close to the pair of continuous side sheets SSa and SSb. Next, the continuous surface sheet P2 and the absorbers P3 arranged at predetermined intervals in the conveyance direction MD are supplied to the joining device 270 . Furthermore, the continuous surface sheet P2 and the absorber P3 are sandwiched between a pair of joining rollers 270a and 270b of the joining device 270 and joined. Thereby, the semi-finished product P4 is formed. Next, the semi-finished product P4 is supplied to the pressing device 280 . An embossing roller 280a having a convex portion for pressing on the outer peripheral surface and an anvil roller 280b are arranged facing each other on the pressing device 280 surface. Then, the semi-finished product P4 is clamped between the embossing roller 280a and the anvil roller 280b and pressed. As a result, the pressed parts 11 to 15 extending from the continuous surface sheet P2 to the absorber P3 in the up-down direction TD are formed, thereby forming a semi-finished product P5. In addition, each pressing section can also be pressed using different pressing devices. Next, the continuous back sheet BS for the back sheet 3 is supplied from the material roll WR4 to the joining device 290 . An adhesive (example: hot melt adhesive) is applied to one surface of the continuous back sheet BS by the coating device 306 . On the other hand, the semi-finished product P5 is supplied to the joining device 290 . Furthermore, the continuous back sheet BS and the semi-finished product P5 are sandwiched between a pair of joining rollers 290a and 290b of the joining device 290 and joined. Thereby, as shown in FIG. 5(d), a semi-finished product P6 is formed in which the continuous back sheet BS and the semi-finished product P5 are laminated in the up-down direction TD. Thereafter, the peelable sheet CT (fixed portions 7 and 8) having an adhesive is joined to the semi-finished product P6, and the peripheral portion of the semi-finished product P6 joined to the peelable sheet CT is cut into the shape of the sanitary napkin 1 to form a sanitary napkin. Cotton 1.

In the above manner, sanitary napkin 1 for physiological use is manufactured.

(Second Embodiment) Hereinafter, the sanitary napkin 1 of the second embodiment will be mainly described with respect to the differences from the sanitary napkin 1 of the first embodiment. 7 to 8 are diagrams showing structural examples of the sanitary napkin 1 according to the embodiment. FIG. 7 is a plan view showing a state in which the sanitary napkin 1 is unfolded, and FIG. 8 is a cross-sectional view along line VIII-VIII in FIG. 7 . The sanitary napkin 1 of this embodiment is provided with a pair of three-dimensional hems 16 and 16 at the inner ends of the pair of side sheets 6 and 6 in the width direction W; and at the width of the auxiliary sheet 5 It is different from the sanitary napkin 1 of the first embodiment in that there is no pair of loop portions 5L at both ends in the side direction W. The following is a detailed description.

The pair of side sheets 6, 6 is provided with a pair of three-dimensional hems 16, 16, which are provided corresponding to each of the two ends of the auxiliary sheet 5 in the width direction W, and are located on the skin side of the two ends. . The pair of three-dimensional ruffles 16, 16 are provided corresponding to each of the pair of side sheets 6, 6, and are located at two ends opposite to the inner sides of the pair of side sheets 6, 6 in the width direction W. . In other words, the pair of three-dimensional hems 16 and 16 are arranged along the longitudinal direction L on both sides of the auxiliary sheet 5 in the width direction W. Each of the pair of three-dimensional hems 16 and 16 has an outer end in the width direction W as a fixed end 16E1 (an inner end in the width direction W of the joint portion with the auxiliary sheet 5), and an inner end thereof. As the free end 16E2 (the end that is not joined to members such as the surface sheet 2 and the auxiliary sheet 5). The three-dimensional frill 16 has an elastic member 16a extending along the longitudinal direction L at the free end 16E2. However, the three-dimensional frills 16 may not have elastic members.

The length between the fixed end 16E1 and the free end 16E2 in the width direction W of the three-dimensional frill 16 is longer than the length between the end edge 2E in the width direction W and the joint end edge 17 of the surface sheet 2 , that is, the length between The length of the end area EA in the width direction W is longer. Thereby, the height of the three-dimensional frills 16 when raised can be set higher than the height of the end area EA when raised. Therefore, even if liquid excrement leaks from the end area EA, leakage of liquid excrement from the three-dimensional hem 16 can be suppressed more reliably. Thereby, while ensuring the skin touch, liquid excrement can be properly guided to the absorber 4, and absorption performance can be improved.

The surface sheet 2 is located between one fixed end 16E1 and the other fixed end 16E1 of a pair of three-dimensional hems 16, 16 in the width direction W, separated from both fixed ends 16E1, 16E1. . That is, in the width direction W, both end edges 2E and 2E of the surface sheet 2 in the width direction W are separated from one fixed end 16E1 and the other fixed end 16E1 of the pair of three-dimensional hems 16 and 16 .

In the sanitary napkin 1, the surface sheet 2 is positioned between a pair of fixed ends 16E1 and 16E1 of a pair of three-dimensional hems 16 and 16. Therefore, when body pressure is applied to the surface sheet 2, the pair of three-dimensional frills 16, 16 are transmitted from the surface sheet 2 to the side sheets, thereby suppressing side leakage of liquid excreta. Furthermore, liquid excrement accumulates in the end areas EA and EA on both sides of the surface sheet 2. Even if it is exposed in the width direction W from here, it is separated from the surface sheet 2 by the pair of three-dimensional hems 16, 16. The auxiliary sheet 5 exposed at the separated position can absorb liquid excrement, so the side leakage of liquid excrement can be further suppressed. This ensures an absorbent touch against the skin and can appropriately guide liquid excrement to the absorbent body 4, thereby improving the absorption performance.

The sanitary napkin 1 has end fixing portions 19, 19 for fixing the front and rear ends in the longitudinal direction L of each of the pair of three-dimensional hems 16, 16 to the pair of side sheets 6, The front and rear parts of the inner end of the corresponding side sheet 6 in 6. In the width direction W, the end fixing portions 19 and 19 are located outside the both end edges 2E of the surface sheet 2 . The sanitary napkin 1 has an end fixing portion 19 that fixes the front and rear ends of the three-dimensional hem 16 to the front and rear portions of the inner end of the side sheet 6. The end fixing portion 19 is located at It is further outside than the end edge 2E of the surface sheet 2 . That is, the end areas EA and EA on both sides of the surface sheet 2 and the erection of the pair of three-dimensional hems 16 and 16 are not hindered, and the length of the pair of three-dimensional hems 16 and 16 can be fixed. Both ends in the side direction L. This can further suppress the outward collapse of each three-dimensional frill 16 , that is, the side leakage of liquid excrement reaching each three-dimensional frill 16 .

The absorbent article of the present invention is not limited to each of the above-described embodiments, and appropriate combinations, changes, etc. can be made within the scope that does not deviate from the object and spirit of the present invention.

1: sanitary napkins (absorbent articles) 2: Surface flakes 3: thin slices inside 4:Absorbent body 5: Auxiliary sheet 6:Side slices 7: Fixed part 8: Fixed part 9: Wing part 15: Pressing part (hole part) CA: central area EA: end area 2a: 1st fiber layer 2b: 2nd fiber layer 12:Pressing section 17: End edge of joint 18:Joint 2E: Duan edge

4a:Absorbent core

4b: core cladding

5L: Ring part

5E: Duan Yuan

A _C : Long side central area

13:Pressing section

11:Pressing Department

2Ex:end edge

19: End fixing part

P16: 1st continuous sheet

P17: Continuous surface flakes

AS: Continuous auxiliary sheet

P18: Continuous surface flakes

SSa: continuous side sheet

SSb: continuous side sheet

P2: Continuous surface flake

14:Pressing Department

BS: continuous inner sheet

19: End fixing part

[Fig. 1] A plan view showing a structural example of the absorbent article according to the embodiment. [Fig. 2] is a cross-sectional view taken along line II-II in Fig. 1. [Fig. 3] An electron micrograph showing an example of pores of the surface sheet according to the embodiment. [Fig. 4] A schematic diagram showing an example of the structure of pores of the surface sheet according to the embodiment. [Fig. 5] A schematic diagram showing a structural example of the absorbent article manufacturing apparatus according to the embodiment. [Fig. 6] is a cross-sectional view illustrating the manufacturing method of the absorbent article according to the embodiment. [Fig. 7] A plan view showing another structural example of the absorbent article according to the embodiment. [Fig. 8] It is a cross-sectional view along line VIII-VIII of Fig. 7.

1:Absorbent items

2: Surface flakes

2a: 1st fiber layer

2b: 2nd fiber layer

2E: Duan edge

3: thin slices inside

4:Absorbent body

4a:Absorbent core

4b: core cladding

5: Auxiliary sheet

5E: Duan Yuan

5L: Ring part

6:Side slices

7: Fixed part

8: Fixed part

9: Wing part

12:Pressing section

15: Hole

17: End edge of joint

18:Joint

Claims (13)

An absorbent article having a longitudinal direction, a width direction and a thickness direction, in which a surface sheet, an auxiliary sheet, an absorbent body, a back sheet and a fixing part are laminated in this order in the thickness direction, the absorbent article having The characteristic is that the dimension of the surface sheet in the width direction is smaller than the dimension of the auxiliary sheet in the width direction, and the surface sheet has a central region located in the center of the width direction and in the longitudinal direction. and a pair of end regions extending from one end of the absorbent article to the other end of the absorbent article, adjacent to both outer sides of the central region in the width direction, and in the longitudinal direction. The absorbent article extends from one end to the other end, the central region is joined to the auxiliary sheet, the pair of end regions are not joined to the auxiliary sheet, and the central region of the surface sheet has Plural holes. An absorbent article having a longitudinal direction, a width direction and a thickness direction, in which a surface sheet, an auxiliary sheet, an absorbent body, a back sheet and a fixing part are laminated in this order in the thickness direction, the absorbent article having The characteristic is that the dimension of the surface sheet in the width direction is smaller than the dimension of the auxiliary sheet in the width direction, and the surface sheet has a center located at the center of the width direction. regions, and a pair of end regions adjacent to both outer sides of the central region in the width direction, the central region being joined to the auxiliary sheet, and at least part of the pair of end regions not being joined to the auxiliary sheet, The central region of the surface sheet has a plurality of holes, the surface sheet is formed of non-woven fabric, and among the fibers constituting the non-woven fabric, fibers present in the end regions are oriented more toward the long side than fibers present in the central region. direction. An absorbent article having a longitudinal direction, a width direction and a thickness direction, in which a surface sheet, an auxiliary sheet, an absorbent body, a back sheet and a fixing part are laminated in this order in the thickness direction, the absorbent article having The characteristic is that the dimension of the surface sheet in the width direction is smaller than the dimension of the auxiliary sheet in the width direction, and the surface sheet has a central region located at the center of the width direction, and a central region in the width direction. The pair of end regions adjacent to both outer sides in the width direction, the central region is joined to the auxiliary sheet, at least part of the pair of end regions is not joined to the auxiliary sheet, and the central region of the surface sheet has The plurality of holes are further provided with a pair of side sheets corresponding to each of the two ends in the width direction of the auxiliary sheet and located on the non-skin side of the two ends, and the auxiliary sheet has a corresponding Each of the two ends in the width direction of the auxiliary sheet is provided so that the two ends are rolled into the auxiliary sheet. A pair of hollow roll-in three-dimensional portions on the non-skin surface side of the sheet are included in each of the pair of hollow roll-in three-dimensional portions, and the end portions of the aforementioned auxiliary sheet in the width direction are joined to the pair by a joint portion. The end portion of the side sheet that corresponds to the end portion and is inward in the widthwise direction. The absorbent article described in claim 3, wherein the size comparison of the portions further outside the joint portions of each of the pair of hollow rolled three-dimensional portions in the width direction when viewed from above is compared The outer portion of the joint portion in the pair of end regions has a larger size. The absorbent article described in claim 3 or 4, further comprising an end fixing portion for wrapping the pair of hollows forward and rearward in the longitudinal direction of each of the three-dimensional portions. The end portions are fixed to the front and rear portions of the inner end portions of the corresponding side sheets in the pair of side sheets. In the width direction, the end portion fixing locations are closer to both end edges of the surface sheet. outside. The absorbent article described in claim 3, further comprising a pair of press portions formed in a region where the surface sheet and the absorbent body overlap in the thickness direction, and the pair of press portions are formed in the thickness direction. Each of the pressing parts reaches from the position of the surface sheet to a position deeper on the non-skin surface side than the aforementioned joint part. Set. An absorbent article having a longitudinal direction, a width direction and a thickness direction, in which a surface sheet, an auxiliary sheet, an absorbent body, a back sheet and a fixing part are laminated in this order in the thickness direction, the absorbent article having The characteristic is that the dimension of the surface sheet in the width direction is smaller than the dimension of the auxiliary sheet in the width direction, and the surface sheet has a central region located at the center of the width direction, and a central region in the width direction. The pair of end regions adjacent to both outer sides in the width direction, the central region is joined to the auxiliary sheet, at least part of the pair of end regions is not joined to the auxiliary sheet, and the central region of the surface sheet has The plurality of holes are further provided with a pair of side sheets corresponding to each of the two ends of the auxiliary sheet in the width direction, and located on the skin side of the two ends, and the pair of side sheets have : A pair of three-dimensional ruffles provided corresponding to each of the pair of side sheets and located at two ends of the pair of side sheets opposite to the inner sides in the width direction of the pair of side sheets, the pair of three-dimensional ruffles Each of the ruffles has an outer end in the width direction as a fixed end and an inner end as a free end, and the surface sheet is one of the pair of three-dimensional ruffles in the width direction. The fixed end and the other fixed end of the pair of three-dimensional frills are located at a position away from the both fixed ends. The absorbent article described in claim 7, further comprising an end fixing portion for fixing the front and rear ends in the longitudinal direction of each of the pair of three-dimensional hems to the one In the front and rear portions of the inner end of the corresponding side sheet, the end fixing portions are located outside both end edges of the surface sheet in the width direction. The absorbent article described in any one of claims 1 to 3 and 7, wherein the central region of the surface sheet and the pair of end regions have a plurality of pores, which are present in the center region when viewed from above. The area of each of the pores in the pair of end regions is smaller than the area of each of the pores present in the central region. The absorbent article described in claim 9, wherein in the surface sheet, the area of the pores in the central region and the pair of end regions is 0.01 mm ² or more and 25 mm ^{2 or} less when viewed from above. The absorbent article described in claim 9, wherein the shape of the pores present in the pair of end regions is such that the dimension in the width direction is larger than the dimension in the longitudinal direction when viewed from above. Short shape. For example, the absorbent article described in any one of claims 1 to 3 and 7, wherein the surface sheet contains water-retentive fibers. In the absorbent article described in claim 12, the surface sheet has an excretion opening contact region in the central region, and the excretion opening contact region contains a weakly water-repellent oil agent.

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