JP6939864B2 - Absorbent article - Google Patents

Description

The present invention relates to absorbent articles, especially disposable diapers and absorbent pads.

In absorbent articles such as disposable diapers (hereinafter, also simply referred to as "diapers"), various improvements have been made to improve their functions and wearing comfort.

Absorbent articles absorb most of the body fluids expelled by the absorber. Here, since the diaper covers the abdomen, buttocks and crotch part, it is affected by various body movements such as walking, turning over, and baby's hi-hi, especially the leg movements. In particular, the absorber may twist, break or crack due to various movements of the body. Then, the fit of the diaper to the crotch is lowered, and liquid leakage is likely to occur.

Therefore, as seen in Patent Document 1, the skin contact surface side of the absorber is embossed, which is a diagonal grid-like compression groove that extends inclined from the front body to the back body of the diaper. There is something. In this way, by embossing the absorber, the fit to the crotch of the diaper is improved by following the back-and-forth movement of the legs and the roundness of the buttocks, and the leakage of body fluid has been suppressed.

Further, such embossing is performed by rotating and moving an embossing roll having an embossing pattern protruding on the surface on a long absorbent sheet. In the production of diapers, for example, an embossing roll is rotated on a long absorbent sheet or the like to emboss the diaper, and then various sheets are laminated and cut into a required size.

By the way, in order to prevent the groove from being flattened even when pressure due to the weight of the wearer is applied, the surface sheet and the absorber are placed from the surface sheet (top sheet) side arranged on the skin contact surface side of the absorber. A compression groove that compresses together with and is less likely to settle has been proposed. Also in this case, as described above, the compression groove is formed by rotating the embossed roll on the absorber on which the surface sheet is laminated. When the compression groove is formed in this way, the rotation of the embossed roll causes the surface sheet or the like located in the upper layer of the absorber to bite toward the groove, and the surface sheet or the like tends to be in a strongly stretched state. In particular, an embossed pattern having a component extending in an oblique direction, such as a diagonal grid, has a portion where the distance between points to be compressed at the same time is shortened (the interval is narrowed), such as near a grid point. If the distance between the points to be compressed at the same time is short, the force for pulling the surface sheet from both adjacent compression points works strongly, and the surface sheet tends to be in a strongly stretched state.

Since the compression groove itself is located at a lower position than the uncompressed part, it does not come into direct contact with the wearer's skin, but the surface sheet and the absorber are pulled and strongly stretched near the grid points, that is, near the corners of the grid. It is fixed in the state of being fixed. Therefore, the powdery super absorbent polymer (hereinafter, also referred to as “SAP”) in the absorbent body may hit the surface sheet. Then, the vicinity of the corners of the lattice on the skin contact surface of the surface sheet becomes harder than other parts, such as the rugged feeling of the highly absorbent resin being transmitted as a touch.

Since the vicinity of the corner of this lattice is higher than the bottom of the compression groove, it touches the wearer's skin and gives the wearer a firm and stiff feel, which is not preferable. In particular, since diapers come into contact with delicate skin parts such as the crotch, a soft touch is required, and if the corners of the lattice are hard, the feeling of touching the skin is not preferable.

On the other hand, in order to make it less likely to give the wearer a sense of discomfort, as seen in Patent Document 2, a compression groove having a high compression portion and a low compression portion surrounding the high compression portion on the skin contact surface side of the absorber. Some are embossed. An absorber having an embossed compression groove having such a high compression portion and a low compression portion receives a force of being compressed in the width direction by the thigh during wearing by the wearer. The high-compression portion does not work like a tension rod, and the low-compression portion existing around the high-compression portion acts as a cushion to flexibly receive the pressure from the width direction of the absorber.

Japanese Unexamined Patent Publication No. 2015-016218 Japanese Unexamined Patent Publication No. 2015-09717

However, the one in which the skin contact surface side of the absorber is embossed, which is a compression groove having a high compression portion and a low compression portion, as described in Patent Document 2, further improves flexibility. Is desired at present, and there is still room for improvement.

The present invention has been made in view of such a problem, and an object of the present invention is to provide a soft touch to an absorbent article formed by compressing both a surface sheet and an absorber in an embossed pattern. The purpose is to provide an absorbent article that is hard to shake and is not easily shaken.

In order to achieve such an object, the absorbent article of the present invention includes a liquid-permeable front sheet, a liquid-impermeable back sheet, and an absorber arranged between the front sheet and the back sheet. On the surface sheet side, a plurality of compression rows in which a plurality of recesses formed by compressing the surface sheet and the absorber are arranged extend, and the plurality of compression rows extend to each other. An intersecting intersecting region is formed, and the recess is composed of a first recess and a second recess further recessed than the first recess, and the second recess is a plurality of grooves extending in the extending direction of the first recess. It is characterized in that an absorber is present in all the regions of the intersection region.

As described above, according to the present invention, it is possible to provide an absorbent article that gives the wearer a soft touch and is hard to shake.

It is a three-dimensional projection drawing which shows the appearance of Embodiment 1 which applied the absorbent article by this invention to a deployable disposable diaper. It is a partial fracture plan view of the diaper shown in FIG. 1 unfolded and viewed from the skin contact surface side. FIG. 3 is a cross-sectional view of the diaper shown in FIG. 3 cut along the line III-III. It is a three-dimensional projection drawing which shows the diaper shown in FIG. 1 in an unfolded state in an exploded state. It is a partial top view of the absorber portion of the diaper shown in FIG. 1 as viewed from the top sheet side. FIG. 5 is an enlarged top view of a part of the compressed row in FIG. FIG. 6 is a cross-sectional view taken along the line VII-VII of FIG. FIG. 6 is a cross-sectional view taken along the line VIII-VIII of FIG.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited to these embodiments, but also includes other absorbent articles belonging to the concept of the present invention.

[Embodiment 1]
FIG. 1 shows a perspective view of the deployable disposable diaper (so-called tape-type disposable diaper) according to the first embodiment of the present invention as viewed from the front side. FIG. 2 shows a plan view of the diaper shown in FIG. 1 unfolded and viewed from the skin contact surface side. A sectional view taken along line III-III of FIG. 2 is shown in FIG. Further, FIG. 4 shows a split state in which the deployable disposable diapers shown in FIGS. 1 and 2 are broken and unfolded.

The deployable disposable diaper (hereinafter, may be simply referred to as a diaper) 10 in the present embodiment includes a front body area 10F, a back body area 10R, and an inseam area 10C connecting the front body area 10F and the back body area 10R. And have. Further, when worn, the front body region 10F and the back body region 10R form a waist circumference opening 10W that surrounds the wearer's waist portion. Similarly, a pair of left and right leg-circumferential openings 10L that surround the thighs of both legs of the wearer are formed by the front body region 10F and the lower end inseam region 10C of the rear body region 10R.

When the diaper 10 is worn, the front body area 10F is located on the ventral side of the wearer, and the back body area 10R is located on the back side of the wearer. The inseam region 10C covers the inseam of the wearer, and the wearer's legs are passed through the pair of left and right leg-circumferential openings 10L. Therefore, the leg circumference opening 10L is located at any of the thighs from the bases of both legs of the wearer.

When the diaper 10 is worn in an appropriate orientation, the line along the central axis of the body from the wearer's head to the inseam is defined as a virtual line P, which is used in the following description as necessary. As shown in FIG. 1, the virtual line P extends from the ventral side to the dorsal side in the central portion of the diaper 10 through the inseam portion. Specifically, for example, when the waist side of the diaper 10 is on the upper side and the inseam side is on the lower side, the virtual line P extends along the surface of the diaper 10 in the vertical direction and passes through the inseam portion to the back. It also extends in the vertical direction on the side. In other words, this vertical direction is a direction along the central axis of the body from the wearer's head to the inseam, and the virtual line P extends along the central axis of the body.

At the left and right end edges of the back body area 10R of the cover sheet 11 located on the outside of the diaper 10, when worn, they are overlapped with the left and right end edges of the front body area 10F and connected to form an opening 10L around the legs. A pair of left and right fastening tapes 10A to be obtained are joined. The fastening tape 10A is repeatedly peelably joined to the front patch sheet 10B joined on the cover sheet 11 of the front body region 10F. Further, an elastic sheet 10D extending along the width direction of the cover sheet 11 and giving the wearer an appropriate wearing feeling around the waist is joined to the upper end portion of the back body region 10R of the cover sheet 11. Has been done.

As shown in FIGS. 2 to 4, the diaper 10 in the present embodiment has a cover sheet 11, a liquid-impermeable back sheet 12, and a thin hydrophilic surface in this order from the outside when viewed from the wearer's skin side. The absorber 13 wrapped in the core wrap (tish) 15 which is a sheet (hereinafter, also simply referred to as the absorber 13) and the liquid-permeable top sheet 14 that comes into contact with the wearer's skin are laminated and joined in order. be. The back sheet 12, the absorbent body 13 wrapped with the core wrap 15, and the top sheet 14 can be attached to underwear or the like to form an absorbent article that absorbs liquid.

A pair of semicircular notches 11A forming an opening 10L around the leg are formed on both the left and right sides of the inseam region 10C of the cover sheet 11. The liquid-impermeable back sheet 12 is joined to the cover sheet 11, and the absorbent body 13 is arranged between the back sheet 12 and the liquid-permeable top sheet 14, and is interposed through the absorbent body 13. The top sheet 14 is joined to the back sheet 12. Thread rubbers 16 for forming gathers around the legs are joined in an extended state near the center of the left and right side edges of the back sheet 12 in the width direction.

A pair of liquid-impermeable side sheets 18 forming three-dimensional gathers are provided on the left and right side edges of the liquid-permeable top sheet 14 in the width direction in the present embodiment. The outer edge of the pair of side seats 18 is formed in the same shape as the pair of notches 11A of the cover sheet 11, and when worn, the pair of side seats 18 stand up along the left and right side edges of the absorber 13 and are excreted by the wearer. It is a member for preventing lateral leakage of urine. When the thread rubber 19 as a three-dimensional gather elastic material is arranged in a stretched state in each of the pair of side sheets 18 so that the inner edge portion thereof is folded back toward the absorber 13 and gripped, and the thread rubber 19 contracts. In addition, it stands up in the direction of contact with the wearer's skin. The three-dimensional gather can adopt a known configuration used for conventional disposable diapers. For example, it can be formed by sandwiching and fixing a three-dimensional gather elastic material in a stretched state between layers of a water-repellent sheet.

As shown in FIG. 2, the side sheet 18 is attracted in the longitudinal direction by the expansion and contraction of the rubber thread 19. Then, as shown in FIG. 3, it becomes a three-dimensional gather in which the inner edge portion is raised.

In the diaper 10 of the present embodiment, the absorber 13 is elongated along the virtual line P, and its longitudinal direction is parallel to the virtual line P. Then, the direction orthogonal to the virtual line P is defined as the width direction. The ratio of the diaper 10 in the longitudinal direction and the width direction is not limited to this embodiment. This ratio is appropriately changed according to the wearer's body shape.

Next, the structure of the absorber portion in the present embodiment will be described.

FIG. 5 is a partial top view of the portion where the absorber 13 and the top sheet 14 are located, as viewed from the top sheet 14 side.

The absorber 13 of the present embodiment, which is located under the top sheet 14, is mainly composed of pulp and SAP. The absorber 13 has an elongated shape so as to extend to the front body, inseam, and back body. The front body portion M1, the inseam portion M2, and the back body portion M3 are divided into three parts. In the inseam portion M2, a pair of arc-shaped notches 13A are formed in accordance with a pair of left and right leg-circumferential openings 10L surrounding the thigh portions of both legs. The cutout portion 13A does not have to be formed according to the size of the absorber 13. Further, the absorber 13 of the present embodiment is provided with a notch portion 13A and has an hourglass shape in which the width of the central portion is narrower than that of the front and rear ends. Not exclusively. If the front and back body parts are in the front-back (up-down) direction and the direction perpendicular to it is the left-right direction, for example, the front-back (up-down) end corners are rounded off, and the front-back (up-down) oval shape. Includes various shapes such as those with a circular shape, those with a rectangular shape with the same length in the front-back (up-down) and left-right directions.

Further, the absorber 13 has an elongated shape, and in order to maintain the shape, for example, the absorber 13 is wrapped with a core wrap 15 which is a thin hydrophilic sheet whose ends are joined by gluing. The absorber 13 wrapped in the core wrap 15 is arranged between the back sheet 12 and the top sheet 14. The top sheet 14 is joined to the back sheet 12 via an absorber 13 wrapped in a core wrap 15. In the present embodiment, the absorber 13 wrapped in the core wrap 15 is used, but the absorber in the present invention does not have to be wrapped in the core wrap.

Then, as shown in FIG. 5, the diaper 10 has a compressed portion forming region (embossed pattern forming region) N1 which is compressed by regular embossing from the surface of the top sheet 14 toward the absorber 13. In the compression portion forming region N1, a plurality of compression rows 22 in which a plurality of recesses 21 formed by compression are arranged in an oblique lattice pattern are extended. Further, after the compression portion forming region N1, the main absorption region 25 is provided in the region where the compression row 22 is not formed. The main absorption region 25 may be an uncompressed uncompressed region, or may have a partially compressed semi-compressed region and an uncompressed region.

The embossed pattern may be formed up to the upper and lower ends, that is, the upper end portion of the front body portion M1 and the lower end portion of the rear body portion M3. By forming the embossed pattern up to the upper and lower ends in this way, the air permeability of the diaper 10 is enhanced, the absorber 13 is easily bent, and the diaper 10 fits the wearer's body.

The recess 21 in the present embodiment is inclined with respect to the virtual line P along the central axis of the wearer's body when wearing the diaper. Specifically, the recess 21 has a right-facing recess 21a inclined to the right in the figure, which is the first direction at a predetermined angle α, and a left in the figure, which is the second direction at a predetermined angle β, with respect to the virtual line P. A left-facing recess 21b inclined in the direction is provided. The recesses 21 inclined in the same direction are arranged so that the diagonal lines of one grid form a row with a length L1 to form an embossed pattern in which each grid extends diagonally in a far-sighted manner. There is. Although not shown in FIG. 5, the recess 21 is formed by compressing both the core wrap 15 and the absorber 13 from the surface of the top sheet 14.

As shown in FIG. 5, the embossed pattern is not formed at both ends of the absorber 13. Therefore, in the absorber 13, the compressed portion non-formed region (embossed pattern non-formed region) N2 is located on both sides of the compressed portion forming region (embossed pattern forming region) N1. This is to prevent body fluid from leaking from the leg circumference opening 10L along the embossed pattern.

As shown in FIG. 5, a row in which a plurality of right-facing recesses 21a are lined up is referred to as a first compression row 22a, and a row in which a plurality of left-facing recesses 21b are lined up is referred to as a second compression row 22b. These compression rows 22 are linear with respect to the virtual line P and are inclined at the same angle as the inclination angle of the recess 21. The first compression rows 22a extend in parallel with a gap S1 from each other. Further, the second compression row 22b extends in parallel with a gap S2 from each other. In this way, the first compression row 22a and the second compression row 22b are extended to form an embossed pattern in a diagonal grid pattern. In the present embodiment, the intersection region 23 is formed by the first compression row 22a and the second compression row 22b intersecting each other. In the present embodiment, the intervals S1 and S2 have the same value, but they may have different values. Further, in the present embodiment, the predetermined angle α and the predetermined angle β have the same value, but they may have different values.

FIG. 6 is an enlarged schematic view of a part of the compression row 22 of the circle Q portion in FIG. FIG. 7 is a diagram showing a cross section taken along line VII-VII of FIG. FIG. 8 is a diagram showing a cross section taken along line VIII-VIII of FIG.

As shown in FIGS. 6 to 8, the recess 21 is composed of a first recess 211 and a second recess 212 that is recessed deeper than the first recess 211. The first recess 211 is arranged at the center of the compression row 22 in the width direction, and is formed so as to extend in the extension direction of the compression row 22. The planar shape of the first recess 211 is oval at the side portions of the lattice shape formed by the plurality of compression rows 22, and is circular at the intersection region 23 of the lattice shape. Here, the oval is a circle in which two circles having the same radius are connected by a common circumscribed line. The second recess 212 is a continuous groove formed on both side edges of the compression row 22 in the extending direction by being compressed deeper in the thickness direction of the absorber 13 than the first recess 211.

As shown in FIGS. 7 and 8, in the recess 21, the second recess 212 is located at the deepest point, and the first recess 211 is located slightly above the bottom of the second recess 212. In the present embodiment, the first recess 211 is formed by a curved surface, and the first recess 211 and the second recess 212 are connected by a continuous curved surface. In the diaper 10 of the present embodiment, since the first recess 211 is formed of a curved surface, it is possible to make the diaper feel better to the wearer than the conventional diaper having the recess having corners. Further, in the cross-sectional shape of the first recess 211 shown in FIG. 7, the open end portion is wider than the bottom portion.

Here, the thickness of the absorber 13 wrapped by the core wrap 15 of the first recess 211 and the top sheet 14 is set to D1, and the deepest position of the recess 21, that is, the absorber 13 wrapped by the core wrap 15 of the second recess 212. And the thickness of the top sheet 14 is D2. The thickness D3, which is the difference obtained by subtracting the thickness D2 from the thickness D1, is about 30% to 50% of the thickness D1 of the first recess 211. Then, assuming that the maximum thickness of the absorber 13 and the top sheet 14 wrapped in the core wrap 15 in the main absorption region 25 is D4, the thickness D1 of the first recess 211 is about 3% to 15% of the thickness D4. .. The thickness D2 of the second recess 212 is about 2% to 8% of the thickness D4. As described above, the recess 21 in the present embodiment is formed by deeply compressing the absorber 13 toward the back sheet 12. And it has a shape with two levels of depth.

In the embossing process for forming the recess 21, an adhesive is interposed between the top sheet 14 and the absorber 13 to compress both the top sheet 14 and the absorber 13 from the surface of the top sheet 14. The recess 21 is formed by compressing both the top sheet 14 and the absorber 13 from the surface of the top sheet 14 by a predetermined mold formed on the embossed roll. Since the second recess 212 is a continuous groove formed on both side edges of the compression row 22 in the extending direction, the bottom area of the second recess 212 is the first recess 211 having an oval planar shape. It is smaller than the bottom area. Therefore, when pressed by the embossing roll, the pressure is concentrated on the second recess 212, and the absorber 13 and the top sheet 14 are strongly compressed. At the time of this compression, the pulp fibers of the absorber 13 and the fibers of the top sheet 14 are firmly entangled and joined in a state where they are integrated. As described above, since the area of the first recess 211 is large and the heat transfer region is wide, the sheet can be stretched by that amount, the load of the sheet sent to the second recess 212 is reduced, and the sheet is less likely to be torn.

Next, the same pressing force is applied to the first recess 211 during compression, but the pressure is not concentrated as much as the second recess 212 because the bottom area is wider and shallower than the second recess 212. Therefore, the bond between the absorber 13 and the top sheet 14 is slightly weaker than that of the second recess 212, but is sufficient to form the shape of the first recess 211. In this way, the absorber 13 is strongly compressed in the second recess 212, and the absorber 13 and the top sheet 14 are firmly joined to maintain the shape of the recess 21 clearly. For example, even when the wearer sits down and pressure is applied to the surface of the absorber 13 due to the weight of the wearer, the recess 21 maintains its shape without sagging. Then, even if the diaper 10 is strongly pulled by various movements of the legs, the top sheet 14 and the absorber 13 are firmly joined, and the recess 21 maintains its shape.

On the other hand, instead of having a two-stage structure of the first recess 211 and the second recess 212, it is conceivable to apply a strong compressive force to the entire recess 21 to form the recess 21. That is, in embossing, it is also conceivable to compress using a mold having only protrusions that forms a compression row 22 having a flat surface. However, in such a mold, since the part where the pressure is concentrated is not created, it is not possible to create the part where the surface sheet and the absorber are joined in a state where the fibers are entangled unless a strong pressure is applied as a whole. Therefore, the required pressing force becomes very strong, and the top sheet 14 may be torn. In addition, compression with a weak pressing force cannot form a recess 21 that can withstand the weight of the wearer and various movements. In the present embodiment, in the embossed mold, a protrusion corresponding to the second recess 212 is provided and partially strongly compressed to create a portion where the top sheet 14 and the absorber 13 are firmly joined and manufactured. Prevents defects such as the top sheet 14 being torn at times. In the present embodiment, the recess 21 has a two-stage structure, but may have a multi-story structure having three or more stages.

As shown in FIG. 7, the absorber 13 is a high-density portion 13D having the highest density of the bottom surface portion of the second recess 212. The main absorption region 25 is a low density portion 13G having the lowest density of the absorber. The bottom surface portion of the first recess 211 is a medium density portion 13E.

Here, as described above, the absorber 13 is mainly composed of SAP and pulp, and the density is mainly related to the pulp fiber density. Therefore, the high-density portion 13D is in a state in which the pulp is compressed and the gaps between the pulps are small, while the low-density portion 13G is in a state in which the gaps between the pulps are larger than those in the high-density portion 13D.

In addition, since the recess 21 is formed in the form of a film by compression-bonding the top sheet 14 which is a synthetic fiber and the absorber 13 whose main component is pulp, the bottom surface of the recess 21 is until the body fluid is absorbed. Promotes the diffusion of body fluids in the extending direction of the compression row 22.

On the other hand, when the body fluid is absorbed in the recess 21, the thickness of the recess 21 increases sharply. At the same time, since the thickness of the main absorption region 25 of the low density portion 13G also increases, a force for drawing the body fluid absorbed in the recess 21 is generated in the main absorption region 25. The body fluid drawn into the main absorption region 25 permeates into another compression row 22 adjacent to the main absorption region 25, further increases the thickness of the recess 21 in the compression row 22, and continuously promotes the diffusion of body fluid. Let me. Due to its high pull-in speed, the SAP in the area through which the body fluid has passed is maintained with an absorption capacity.

After a certain period of time, when the body fluid permeates into the recess 21 that first absorbed the body fluid, the body fluid quickly flows on the surface of the diaper in which the recess 21 and the main absorption region 25 are integrally flattened due to the swelling of the recess 21. The body fluid reaches the unpenetrated area (the area where the body fluid does not pass). At the same time, the SAP in the region through which the body fluid has passed has an absorption capacity, so that the body fluid is quickly absorbed. Further, the body fluid that has reached the unpenetrated region permeates the bottom surface of the recess 21 of the other compression row 22, and the body fluid is diffused by the above-mentioned mechanism.

In the present embodiment, the concave portion 21 of the diagonal lattice-shaped embossed pattern is formed by pressing the embossed roll having a mold formed on the surface of the concave portion 21 while rotating the embossed roll. As shown in FIG. 5, when the embossed roll advances in the arrow W direction (direction from the front body portion M1 to the rear body portion M3) while rotating, the recesses lined up in the direction orthogonal to the traveling direction W of the embossed roll. All 21 parts will be pressed at the same time. In the present embodiment, the size of the embossed roll is determined so that the circumference of the embossed roll corresponds to the length in the longitudinal direction of the absorber 13, but the size of the embossed roll is not limited to this.

In the present embodiment, the traveling direction W of the embossing roll is parallel to the direction of the virtual line P when the diaper 10 is completed. As described above, both the top sheet 14 and the absorber 13 are compressed by embossing rolls, and then cut into the size of the diaper 10 by laminating other necessary sheets or the like. Since the cutting is performed by the length of the front body, inseam, and back body of the diaper 10, the traveling direction W of the embossing roll is also parallel to the virtual line P, so that the diagonal grid shape is inclined with respect to the virtual line P. Embossed pattern can be formed.

Therefore, the right-facing recess 21a is inclined to the right with respect to the traveling direction W, and the left-facing recess 21b is inclined to the left. Therefore, as the embossing roll advances in the traveling direction W, the distance between the right-facing recess 21a and the left-facing recess 21b adjacent to the intersecting portion 23 becomes shorter.

Here, when the embossing roll forming the recess 21 is pressed, the top sheet 14 is pulled so as to be pulled into the recess 21. Since the adjacent right-facing recesses 21a and left-facing recesses 21b are formed by pressing them at the same time, the top sheet 14 located between them is pulled from the left and right. That is, in FIG. 6, the pulling force indicated by the arrow A is applied to the left and right sides at the same time, and the top sheet 14 is pulled. As the distance between the adjacent right-facing recesses 21a and the left-facing recesses 21b becomes shorter, the margin for pulling the pulling force A of the top sheet 14 decreases, so that the top sheet 14 becomes strongly stretched. Therefore, the SAP in the absorber 13 hits the top sheet 14, and the surface of the top sheet 14 has a rugged feel. This is not preferable because it is irritating to the wearer's skin.

Further, if the recess 21 is suddenly formed deeply, the embossing roll is pressed deeply before the top sheet 14 is stretched by heat transfer or the like, so that the top sheet 14 may be torn. However, if the embossing roll is simply pressed lightly to form the recess 21, the adhesive effect between the top sheet 14 and the absorber 13 is weakened, and the top sheet 14 is easily peeled off from the absorber 13 so that the top sheet 14 is clearly peeled off. It also becomes impossible to form the embossed pattern.

Therefore, in the recess 21 of the present embodiment, the emboss roll is shallowly pressed to form the first recess 211 of the medium density portion 13E, which is a low compression portion, and the heat from the emboss roll is transferred to stretch the top sheet 14. Therefore, the second recess 212 of the high-density portion 13D, which is a high-compression portion, is formed. By forming the first concave portion 211 which is a low compression portion, it is possible to provide a margin in the intersecting region 23 with respect to the pulling force A of the top sheet 14, and the absorber 13 is not pressed down. The surface feels good and has a smooth finish. Further, it is possible to prevent the top sheet 14 from peeling off from the absorber 13 while maintaining the softness of the top sheet 14 and the absorber 13.

Further, for example, in a concave portion having a two-stage structure, when the central portion of the oval or circular first concave portion is pressed deeper to form the second concave portion, the flexibility is increased in the second concave portion having the thinnest thickness in the center of the concave portion. , Easy to bend and stretch. However, it is desirable that the absorber has increased flexibility at both side edges in the extending direction of the compression row in which the recesses are arranged.

Therefore, since the recess 21 of the present embodiment forms the second recess 212 formed by a groove pressed deeper around the oval or circular first recess 211, the compression row 22 is extended as shown in FIG. The thickness is the thinnest at both side edges (high density portion 13D) in the existing direction, and flexibility can be enhanced. As a result, the absorber 13 is easily bent at both side edges of the compression row 22, and the flexibility can be further improved, so that the wearer of the diaper 10 can be given a soft touch.

Further, since the oval first recess 211 of the present embodiment has a large area and is gently formed, the top sheet 14 is less likely to be torn and is more easily stretched. In addition, since the oval first recess 211 is formed of a curved surface, it is possible to improve the feel of the wearer even on the surface of the compression row 22.

Further, since the second recess 212 of the present embodiment is a continuous groove formed on both side edges of the compression row 22 in the extending direction, the second recess 212 is second on all the both side edges of the compression row 22 in the extending direction. The recess 212 is formed. As a result, the diaper 10 of the present embodiment improves the bendability and flexibility at both side edges of the compression row 22 in the extending direction, as compared with the case where the second recess is intermittently arranged. be able to. Therefore, the compression row 22 is easily bent to the left and right in the extending direction of the compression row 22 as an axis, and the wearer of the diaper 10 can be given a soft touch.

In the present embodiment, the embossing process is performed by using an embossing roll, but the method is not limited to this method, and embossing is performed in units of diaper size by using a plate-shaped embossing plate that matches the size of the diaper. It may be something that is pushed.

In addition, not only the absorber 13 wrapped with a hydrophilic sheet and then the top sheet 14 is arranged, but also the top sheet 14 may be arranged directly on the absorber 13. Further, a liquid diffusion sheet for improving liquid diffusivity may be provided between the top sheet 14 and the hydrophilic sheet. This sheet makes it easier for body fluids to diffuse. Further, the hydrophilic sheet may be attached so as to wrap the absorber 13, or may be simply arranged so as to be stacked on the front and back without wrapping the end portion of the absorber 13.

Next, an example of the embossing pattern by embossing will be described.

As shown in FIG. 5, the embossing pattern of this embodiment has a grid shape in which a plurality of continuously extending recesses 21 are arranged, and the length of the diagonal line L1 of one grid is 42 mm (4.2 cm). The recess 21 is arranged so as to be. Further, as shown in FIG. 6, the width Q1 of the compression row 22 is 3 mm. Further, the width Q2 of the first recess 211 is 2.1 mm, the length Q3 of the first recess 211 in the extending direction is 24.7 mm, and between two adjacent first recesses 211 sandwiching the intersection region 23. The distance Q4 is 5 mm. The diameter Q5 of the circular first recess 211 in the intersection region 23 is 4 mm. Further, the thickness of the absorber 13 and the top sheet 14 before embossing is 8.0 mm. The thickness of the absorber 13 and the top sheet 14 before embossing is preferably 5.0 mm to 20.0 mm. Further, with respect to the configuration of the absorber 13 and the top sheet 14, the width Q1 of the compression row 22 is preferably 2 mm to 5 mm, and the width Q2 of the first recess 211 is preferably 1.0 mm to 4.0 mm. The length Q3 of the first recess 211 in the extending direction is preferably 10 mm to 50 mm. The distance Q4 between the first recesses 211 is preferably 2 mm to 5 mm. The diameter Q5 of the circular first recess 211 in the intersection region 23 is preferably 2 mm to 7 mm.

Further, as shown in FIGS. 5 and 6, in the embossing pattern of this embodiment, the first compression row 22a is arranged in parallel at the interval S1, and the second compression row 22b is arranged in parallel at the interval S2. Then, the first compression row 22a and the second compression row 22b form an embossed pattern that becomes a diagonal grid in a hyperopic manner. The lengths S1 and S2 of one side of the grid in this embodiment are equal and are 27.0 mm. The grid spacing is preferably 13.0 mm or more and 54.0 mm or less.

Further, as shown in FIG. 7, the thickness D1 composed of the absorber 13 wrapped by the core wrap 15 of the first recess 211 and the top sheet 14 is 0.7 mm. The thickness D2 composed of the absorber 13 wrapped by the core wrap 15 of the second recess 212 and the top sheet 14 is 0.4 mm. The maximum thickness of the main absorption region 25 is 8.0 mm. The thickness D1 of the first recess 211 is preferably 0.3 mm to 1.1 mm. The difference thickness D3 between the thickness D1 of the first recess 211 and the thickness D2 of the second recess 212 is preferably 0.1 mm to 0.5 mm. The maximum thickness of the main absorption region 25 is preferably 5.0 mm to 20.0 mm.

By forming each recess 21 at such a depth and spacing, the groove can be maintained even when weight is applied, and a soft touch is maintained on the skin contact surface of the inseam of the diaper. Can be done. Therefore, the diagonal grid-like embossed pattern can suppress deformation such as diaper twisting due to various movements of the legs, and can make the skin soft to the touch and suppress irritation to the skin as much as possible.

Further, in the present embodiment, the grid-shaped compression row 22 is formed by the plurality of recesses 21, but one side of the grid-shaped box is formed by one first recess 211 extending in the direction of the compression row 22. You may do so. In the present embodiment, the planar shape of the first recess 211 forms an oval at the side portion of the lattice shape formed by the plurality of compression rows 22, and forms a circle at the intersection region 23 of the lattice shape. However, in the present invention, not only these shapes but also various shapes such as a triangle, a quadrangle, an ellipse, an oval, and a rounded rectangle can be taken.

The disposable diaper 10 according to the above embodiment of the present invention is applicable to both adults and children. Further, in the present embodiment, the deployable diaper 10 (so-called tape type diaper) has been described as an example, but it goes without saying that the present embodiment can also be applied to pants type diapers. Further, the absorbent article of the present invention is not specified only for diapers, but is applied to various other general absorbent articles such as an absorbent pad and a urine leak pad. For example, as shown in FIG. 5, from the structure of the absorber 13 and the top sheet 14, the present invention can be applied to an absorbent pad or the like, and has the same action and effect as a diaper.

10 Disposable diaper 10A Fastening tape 10B Front patch sheet 10F Front body area 10R Back body area 10C Inseam area 10W Waist circumference opening 10L Leg circumference opening 10D Elastic sheet 11 Cover sheet 11A, 13A Notch 12 Back sheet (back sheet)
13 Absorber 14 Top sheet (surface sheet)
15 Core wrap 16, 19 Thread rubber 18 Side sheet 21 Recess 21a Right-facing recess (recess inclined in the first direction)
21b Left-facing recess (recess inclined in the second direction)
211 First recess 212 Second recess (the part of the recess that forms the deepest bottom)
22 Compression row 22a First compression row 22b Second compression row 23 Intersection region 25 Main absorption region S1 Formation interval of multiple first compression rows S2 Formation interval of multiple second compression rows Q1 Width of compression row Q2 Diameter of recess Q3 Arrangement spacing of recesses Q4 Distance between adjacent first recesses in the intersecting region D1 Thickness of first recess D2 Thickness of second recess D3 Thickness of difference in depth between first recess and second recess D4 Thickness of main absorption region L1 Diagonal line of one box

Claims (6)

An absorbent article comprising a liquid-permeable front surface sheet, a liquid-impermeable back surface sheet, and an absorber disposed between the front surface sheet and the back surface sheet.
On the surface sheet side, a plurality of compression rows in which a plurality of recesses formed by compressing the surface sheet and the absorber are arranged extend.
The plurality of compression columns form intersecting regions that intersect each other.
The recess is composed of a first recess and a second recess further recessed than the first recess.
The second recess is a plurality of grooves extending in the extending direction of the first recess.
The absorber is present in all regions of the intersecting region .
An absorbent article characterized in that the first recess is formed in the center of all the regions of the intersecting region. The absorbent article according to claim 1, wherein the absorber is present in the entire region of the second recess. The absorbent article according to claim 1 or 2, wherein the cross-sectional shape of the first recess in a direction intersecting the extending direction of the compression row is such that the open end is wider than the bottom. The absorbent article according to any one of claims 1 to 3, wherein the first recess and the second recess are continuous with a continuous curved surface. The absorbent article according to any one of claims 1 to 4, wherein the second recess is a continuous groove formed on both side edges of the compression row in the extending direction. The absorbent article according to any one of claims 1 to 5, wherein the first recess is formed of a curved surface.

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