TWI612949B - Absorbent article - Google Patents

Abstract

The absorbent article (10) of the present invention includes a liquid-permeable front sheet (14), a liquid-impermeable back sheet (12), and a front sheet (14) and a back sheet (12). Between the absorbent body (13) including the pulp (29) and SAP (27), on the front sheet (14) side of the absorbent body (13), a plurality of front sheet (14) and the absorbent body (14) are arranged. 13) Compressed rows (22) composed of several recesses (21) formed by compression and crossing each other, pulp amount of the absorber (13) in the region of the compressed row (22) including the intersection region (23) / SAP The value of the amount is larger than the value of the pulp amount / SAP amount of the absorbent body (13) in the compressed row (22) other than the area including the intersecting area (23).

Description

Absorbent article

The present invention relates to an absorbent article, and more particularly to a disposable diaper or absorbent pad.

Various improvements have been made in absorbent articles such as disposable diapers (hereinafter, also simply referred to as "diapers") to improve their functions or wearing sensations.

The absorbent article absorbs most of the discharged body fluid through the absorbent body. Here, since the diaper covers the abdomen, buttocks, and hips, it is affected by the movements of various bodies, especially the legs, such as walking or turning over, baby crawling, and the like. In particular, the absorbent body may wrinkle, bend, or break due to various body movements. If this is the case, the fit of the diaper between the palate will be reduced, and liquid leakage will easily occur. Furthermore, if the content of the super absorbent polymer (Super Absorbent Polymer (hereinafter also referred to as "SAP")) in the absorbent body is increased in order to improve the absorption retention of the absorbent body, the flexibility of the absorbent body itself tends to be lost .

Therefore, as can be seen in Patent Document 1, there are those in which an embossing process is performed on the skin abutting surface side of the absorbent body, and the embossing process extends with respect to the direction from the front body part to the back body part of the diaper. Oblique grid-shaped compression groove. In this way, by embossing the absorbent body, it is possible to follow the forward and backward movement of the legs or the curvature of the buttocks, thereby improving the fit of the diaper between the hips and suppressing leakage of body fluids.

The embossing process is performed by pressing the embossed pattern on the surface. The pattern roller is formed by rotating and moving on a long absorbent sheet. In the production of a diaper, an embossing roll is rotated on a long absorbent sheet or the like to perform embossing, and then various sheets are laminated and cut to a desired size.

[Prior technical literature] [Patent Literature]

[Patent Document 1] Japanese Patent Laid-Open No. 2015-016218

In addition, a compression groove has been proposed, in order to prevent the groove from being squashed even if the groove is subjected to pressure caused by the wearer's weight, a front sheet (a skin sheet disposed on the abutting surface side of the absorber) ( The top sheet) side compresses the front sheet together with the absorbent body, making it more difficult to be crushed. In this case, as described above, the compression groove is formed by rotating the embossing roller on the absorbent body on which the front sheet is laminated. When the compression groove is formed in this way, the front sheet and the like located on the upper layer than the absorbent body will sink into the groove due to the rotation of the embossing roller, so that the front sheet and the like easily become a strong stretched state. In particular, an embossed pattern having a component extending in an oblique direction, such as an oblique lattice shape, has a portion where the distance between the simultaneously compressed locations such as the intersection of the lattices is shortened (the interval is narrowed). At the same time, if the distance between the compressed sites is short, the force of stretching the front sheet from the adjacent compressed sites is strong, so that the front sheet easily becomes a strong stretched state. If so, the powdery SAP in the absorbent body abuts the front sheet, and therefore, the front sheet in the intersecting region is easily damaged during embossing.

The present invention has been made in view of such problems, and an object thereof is to provide an absorbent body in which a grid-shaped embossed pattern is formed so as not to be easily broken and easily broken. An absorbent article that is bent to improve the wearer's feeling of use.

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 absorbent paper pulp and SAP disposed between the front sheet and the back sheet The body is characterized in that: on the front sheet side of the absorbent body, there are arranged a plurality of intersecting compressed lines composed of a plurality of recesses formed by compressing the front sheet and the absorbent body, and the compressed line includes an area of the intersecting area The value of the pulp amount / SAP amount of the absorbent in is larger than the value of the pulp amount / SAP amount of the absorbent in the compressed row outside the area including the intersection region.

As described above, according to the present invention, it is possible to provide an absorbent article in which an intersecting region of an absorbent body having a grid-like embossed pattern is not easily broken and is easily bent, thereby improving a wearer's feeling of use.

10‧‧‧ disposable diapers

10A‧‧‧Hook and loop

10B‧‧‧ Front Sticky Sheet

10C‧‧‧Her area

10D‧‧‧Elastic sheet

10F‧‧‧ Front body area

10L‧‧‧ Leg circumference opening

10R‧‧‧Back body area

10W‧‧‧ Waist opening

11‧‧‧ Cover sheet

11A, 13A‧‧‧Notch

12‧‧‧ bottom sheet (back sheet)

13‧‧‧ Absorber

13D‧‧‧More than SAP. Rolling section

13E‧‧‧More than SAP. Non-rolled section

13F‧‧‧less SAP. Rolling section

14‧‧‧ top sheet (front sheet)

15‧‧‧Pack of chips

16, 19‧‧‧ rubber thread

18‧‧‧Side Sheet

21‧‧‧ recess

21a‧‧‧Right recess (concave inclined to the first direction)

21b‧‧‧Left recess (concave inclined toward 2nd direction)

22‧‧‧ compressed line

22a‧‧‧The first compressed line

22b‧‧‧ 2nd compressed row

23‧‧‧ cross area

25‧‧‧ main absorption area

27‧‧‧SAP

29‧‧‧ Pulp

A, W‧‧‧ Arrow

D1‧‧‧ Depth of recess

D2‧‧‧thickness of main absorption area

D3‧‧‧Thickness of the diaper in the recess

D4‧‧‧Thickness of Absorber in Recess

Diagonal line of L1‧‧‧1

M1‧‧‧ Front body part

M2‧‧‧ 胯

M3‧‧‧ hind body part

N1‧‧‧Compression area forming area

N2‧‧‧Compression area non-formation area (embossed pattern non-formation area)

P‧‧‧imaginary line

Q‧‧‧Circle

Q1‧‧‧Width of compressed line

S1‧‧‧ Formation interval of several first compressed lines

S2‧‧‧ Formation interval of several second compressed rows

α, β‧‧‧ angle

FIG. 1 is a perspective projection view showing an appearance of an embodiment in which the absorbent article of the present invention is applied to a roll-up disposable diaper.

FIG. 2 is a partially cut-away plan view of the diaper shown in FIG. 1 as viewed from the skin contact surface side.

Fig. 3 is a cross-sectional view of the diaper shown in Fig. 2 cut along the line III-III.

Fig. 4 is a perspective projection view showing the diaper shown in Fig. 1 in an exploded state when it is unfolded.

Fig. 5 is a partial plan view of the absorbent body portion of the diaper shown in Fig. 1 as viewed from the top sheet side.

FIG. 6 is an enlarged partial plan view showing a part of the compressed row in FIG. 5 enlarged.

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6.

FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. 6.

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 a deployed disposable diaper (a so-called sheet-type disposable diaper) according to a 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 as viewed from the skin contact surface side. Fig. 3 is a sectional view taken along the line III-III in Fig. 2. Further, Fig. 4 shows a divided state in which the unfolded disposable diaper shown in Figs. 1 and 2 is cut and unfolded.

The unfoldable disposable diaper (hereinafter, sometimes simply referred to as a diaper) 10 in this embodiment has a front body area 10F, a rear body area 10R, and a chin connecting the front body area 10F and the rear body area 10R. Area 10C. In addition, a waistline opening 10W is formed at a portion of the front body region 10F and the back body region 10R that surround the wearer's waist when worn. Similarly, a pair of left and right leg openings 10L are formed at the lower end portions of the front body region 10F and the rear body region 10R and the lower crotch region 10C to surround the thigh portions of the wearer's legs.

When wearing the diaper 10, the front body region 10F is located on the ventral side of the wearer, and the rear body region 10R is located on the back side of the wearer. In addition, the lower crotch region 10C covers the wearer's crotch and the wearer's legs pass through the left and right pair of leg circumference openings 10L, respectively. Therefore, the leg opening 10L is located from the root of the wearer's legs to the largest. Any position around the legs.

The line along the central axis of the body from the wearer's head to the bottom when wearing the diaper 10 in the correct direction is used as the imaginary line P, and is used in the following description as necessary. As shown in FIG. 1, the imaginary line P is extended from the central portion of the diaper 10 through the sub-condylar portion from the ventral side to the dorsal side. Specifically, for example, if the waist side of the diaper 10 is up and the lower side of the crotch is down, the imaginary line P extends along the front side of the diaper 10 in the up-down direction, and the back side is also in the up-down direction through the lower cuff portion Extender. In other words, the vertical direction refers to the direction along the central axis of the body from the wearer's head to the lower part, and the imaginary line P extends along the central axis of the body.

A pair of left and right hook-and-loop fasteners 10A are joined to the left and right end edges of the rear body sheet region 10R of the cover sheet 11 located on the outer side of the diaper 10, and these hook-and-loop fasteners 10A and the front body sheet region 10F are around when worn The edge portions at both ends overlap to connect the two, so that the leg opening 10L can be formed. The hook-and-loop fastener 10A is releasably joined with respect to the front adhesive sheet 10B with respect to the cover sheet 11 joined to the front body sheet region 10F. An elastic sheet 10D is joined to the upper end of the body region 10R behind the cover sheet 11. The elastic sheet 10D extends along the width direction of the cover sheet 11 to give the wearer around the waist. Moderate dressing.

As shown in FIGS. 2 to 4, the diaper 10 in this embodiment is a cover sheet 11 and a liquid-impermeable backsheet (back sheet) 12 in order from the outside when viewed from the wearer's skin side. An absorbent body 13 (hereinafter, also simply referred to as an absorbent body 13) wrapped with a chip (tissue paper) 15 which is a hydrophilic sheet material, and a top sheet (front sheet) 14 in contact with the skin of the wearer. Sequences overlap and join.

On the left and right sides of the lower region 10C of the cover sheet 11, a pair of notch portions 11A each forming a semicircular arc shape and serving as leg openings 10L are formed. liquid An impermeable bottom sheet 12 is bonded to the cover sheet 11. The previous absorber 13 is disposed between the bottom sheet 12 and the liquid-permeable top sheet 14. The top sheet 14 passes through the absorber 13. And bonded to the base sheet 12. Near the center of the edges of the left and right sides of the bottom sheet 12 in the width direction, rubber threads 16 which are used to form leg gathers are joined in an elongated state, respectively.

The liquid-permeable top sheet 14 in the present embodiment is provided with a pair of side sheets 18 which are liquid-impermeable (or water-repellent) sides forming a three-dimensional fold in the widthwise left and right edges of the top sheet 14 in the width direction. The pair of side sheets 18 are members such that the outer end edge portion is formed in the same shape as one of the pair of cutout portions 11A of the cover sheet 11 and rises along the left and right side edges of the absorbent body 13 when worn. To prevent leakage of urine from the wearer. On each of a pair of side sheet materials 18, a rubber thread 19 as a three-dimensional pleated stretchable material is arranged in an extended state in a manner that the inner end edge portion thereof is folded back toward the absorbent body 13 side and held, and is contracted by the rubber thread 19 At this time, the side sheet 18 stands up in the skin-abutting direction of the wearer. The three-dimensional pleats may have a known structure used in a conventional disposable diaper. For example, it can be formed by sandwiching and stretching a three-dimensional pleated stretchable material between stretched sheets. As shown in FIG. 2, the side sheet 18 is pulled in the longitudinal direction by the expansion and contraction of the rubber wire 19. Furthermore, as shown in FIG. 3, it becomes a three-dimensional fold by which the inside edge part stood up.

In addition, the diaper 10 based absorber 13 in this embodiment becomes longer along the virtual line P, and its length direction is parallel to the virtual line P. The direction orthogonal to the imaginary line P is the width direction. It should be noted that the ratio of the length direction to the width direction of the diaper 10 is not limited to this embodiment. This ratio can be appropriately changed according to the wearer's body type.

Next, the structure of the absorber part in this embodiment will be described. Bright.

FIG. 5 is a partial plan view of the portion where the absorbent body 13 and the top sheet 14 are viewed from the top sheet 14 side.

The absorbent body 13 of this embodiment located under the top sheet 14 mainly includes pulp (indicated by symbol 29 in Figs. 7 and 8 below) and SAP (in Figs. 7 and 8 below by Symbol 27)). The absorbent body 13 is formed in an elongated shape so as to span the front body piece, the chin, and the back body piece. Further, it is divided into three parts of a front body part M1, a chin part M2, and a rear body part M3. A pair of left and right pair of leg openings 10L surrounding the thigh portions surrounding the two legs are formed in the inferior part M2 to form a pair of circular cutouts 13A. The notch portion 13A may be formed without corresponding to the size of the absorbent body 13. In addition, the absorber 13 of this embodiment is an hourglass type having a notch portion 13A and a narrower central portion than the front and rear ends, but the shape of the absorber of the present invention is not limited to this. If the front-to-back part is set to the front-back (up-down) direction and the direction orthogonal to it is set to the left-to-right direction, it includes various shapes. The shape, the shape of an ellipse extending in front and back (up and down), the shape of a circle, the shape of a rectangle with the same length in front and back (up and down), and the like.

In order to maintain the shape, the absorbent body 13 is wrapped with, for example, a chip 15 which is a hydrophilic thin sheet whose ends are bonded by paste. The absorbent body 13 wrapped by the package chip 15 is disposed between the bottom sheet 12 and the top sheet 14. The top sheet 14 is bonded to the bottom sheet 12 via an absorber 13 wrapped with a chip 15. In addition, although the absorber 13 wrapped by the chip 15 is used in this embodiment, the absorber in the present invention may not be wrapped by the chip.

Moreover, as shown in FIG. 5, the diaper 10 has the surface from the top sheet 14 A compressed portion forming region (embossed pattern forming region) N1 formed by compressing the absorbent body 13 by a regular embossing process. A plurality of compressed lines 22 are arranged and extended in the compressed portion forming area N1. The compressed lines 22 are formed by a plurality of recessed portions 21 that are continuously formed by compression, and the plurality of recessed portions 21 are arranged in a diagonal grid pattern. Made. Several compressed lines 22 cross each other. Moreover, in the area where the compressed line 22 is not formed among the compressed area formation areas, a non-compressed main absorption area 25 is mainly provided. Moreover, as shown in FIG. 5, the embossed pattern is not formed on both ends of the absorber 13. Therefore, the absorber 13 is one in which the non-compressed portion formation area (embossed pattern non-formation area) N2 exists on both sides of the compressed portion formation area (embossed pattern formation area) N1. The purpose is to prevent body fluid from leaking from the leg opening 10L along the embossed pattern.

In this embodiment, the embossed pattern is formed to 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 to the upper and lower ends in this way, the air permeability of the diaper 10 is improved, and the absorbent body 13 is easily bent, so that the diaper 10 is applied to the body of the wearer. Furthermore, in the present invention, the embossed pattern is not allowed to be formed to the upper end portion of the body portion M1 before the absorbent body 13 and the lower end portion of the rear body portion M3 and to be formed on the absorbent body 13 The appearance of the left and right ends.

The recessed portion 21 in this embodiment is a person inclined with respect to an imaginary line P along the central axis of the wearer's body when wearing a diaper. Specifically, the recessed portion 21 includes a rightward recessed portion 21a inclined at a predetermined angle α in the right direction of the work in the first direction with respect to the imaginary line P, and a leftward image in the second direction of the work at the predetermined angle β. The leftward recessed portion 21b is inclined. In addition, the recessed portions 21 inclined in the same direction are arranged in such a manner that the diagonal line of one grid is formed as a length L1, so as to form embossed patterns that are obliquely extended in a grid shape. Although in this embodiment, both The fixed angle α and the predetermined angle β are set to the same value, but they may be different values. In the present embodiment, the plurality of recesses 21 are formed by compressing the top sheet 14, the chip 15, and the absorber 13 together on the top sheet 14 side. In the present invention, the absorbent body 13 may be embossed together with the top sheet 14 as in this embodiment, or the top sheet 14 may be subsequently attached to the absorbent 13 after the embossing process.

As shown in FIG. 5, a line formed by arranging a plurality of rightward concave portions 21 a is referred to as a first compressed line 22 a, and a line formed by arranging a plurality of leftward concave portions 21 b is referred to as a second compressed line 22 b. The compressed rows 22 are straight lines that are inclined with respect to the virtual line P at the same angle as the inclination angle of the recessed portion 21. The first compressed rows 22a extend in parallel with a distance S1 from each other. Further, the second compressed rows 22b extend in parallel with a distance S2 from each other. In this way, the first compressed line 22a and the second compressed line 22b are extended to form an embossed pattern in a diagonal grid shape. In this embodiment, the first compressed line 22a and the second compressed line 22b intersect with each other to form an intersecting region 23. Although the intervals S1 and S2 are set to the same value in this embodiment, they may be different values.

In the present invention, the value of the pulp amount / SAP amount of the absorbent body 13 in the area of the compressed line 22 including the intersection area 23 is larger than the pulp amount of the absorbent body 13 in the compressed line 22 other than the area including the intersection area 23 / The value of the SAP quantity. FIG. 6 is an enlarged view of a part of the compressed line of the circle Q portion in FIG. 5. FIG. 7 is an enlarged schematic diagram of a cross-sectional shape taken along the line VII-VII of FIG. 6, and FIG. 8 is an enlarged schematic diagram of a cross-sectional shape taken along the line VIII-VIII of FIG. 6. 5 and 6 are drawn for the sake of convenience, and the side sheet 18 is omitted. In FIGS. 7 and 8, the SAP 27 constituting the absorbent body 13 is shown in a roughly star shape, and the pulp 29 constituting the absorbent body 13 is shown in a line or dot shape.

The embossing process for forming the recess 21 is performed by an adhesive (for example, hot-melt adhesion). Agent) is interposed between the top sheet 14 and the absorber 13, and the top sheet 14 and the absorber 13 are compressed together from the surface of the top sheet 14. The recess 21 is formed by compressing the top sheet 14 and the absorber 13 together from the surface of the top sheet 14 by a predetermined mold formed on an embossing roller.

Further, in the pressing performed by the embossing roller, the pressure is concentrated on the deepest position of the recessed portion 21, so that the absorber 13 and the top sheet 14 are strongly compressed. During this compression, the SAP 27 of the absorbent body 13 is deformed in such a manner as to enclose the fibers of the pulp 29, and is entangled firmly, so that a thinner bottom is formed in a state where the two are integrated. In this way, in the recessed portion 21, the absorbent body 13 is strongly compressed, and the absorbent body 13 forms a thin bottom, whereby the shape of the recessed portion 21 is clearly maintained. For example, even when the wearer performs an action such as seating and the surface of the absorber 13 is subjected to pressure caused by the weight of the wearer, the concave portion 21 is not crushed to maintain its shape. Moreover, even if the diaper 10 is strongly stretched due to various movements of the legs, the SAP 27 can be deformed so as to enclose the fibers of the pulp 29, so that the recessed portion 21 can maintain its shape. Furthermore, although the recessed portion 21 is formed as a first-order structure in this embodiment, it may be a multi-stage structure having a second or higher order. By forming into a multi-stage structure, a protrusion corresponding to the lowest recessed portion can be provided in the embossing die to locally and strongly compress it, thereby forming a portion where the top sheet 14 and the absorbent body 13 are firmly joined, and It is possible to prevent defects such as breakage of the top sheet 14 during manufacturing.

In the present embodiment, the recessed portions 21 of the embossed pattern in the oblique lattice shape are formed by embossing the surface of the embossing roller having a mold matching the recessed portion 21 while rotating and pressing. As shown in FIG. 5, if the embossing roller rotates and travels in the direction of the arrow W (the direction from the front body portion M1 to the rear body portion M3), it is orthogonal to the direction W of the embossing roller 21 portions of the recessed portions arranged in the direction are all simultaneously Was pressed. In this embodiment, the size of the embossing roller is determined in such a manner that the circumference of the embossing roller is equal to the length in the length direction of the absorber 13, but it is not limited thereto.

In this embodiment, the direction W of the embossing roller is parallel to the direction of the imaginary line P when the diaper 10 is completed. As described above, the top sheet 14 is laminated on the absorbent body 13 that has been cut to the size of the diaper 10, and the top sheet 14 and the absorbent 13 are compressed together by an embossing roller. The cutting is completed across the length of the front body piece, the chin, and the back body piece of the diaper 10. Therefore, by making the direction W of the embossing roller parallel to the imaginary line P, it is possible to form an oblique inclined to the imaginary line P Checkered embossed pattern.

When the embossing roller is pressed deeper to form the recessed portion 21, the top sheet 14 is further drawn, and therefore the top sheet 14 may be damaged. However, if the embossing roller is pressed only shallowly to form the recessed portion 21, the adhesion effect between the top sheet 14 and the absorbent body 13 becomes weak, so that the top sheet 14 is easily peeled from the absorbent body 13 and thus cannot even form a clear Embossed pattern.

Therefore, the recessed portion 21 of this embodiment enters into the intersecting region 23 with a lower amount of SAP while the distance between the adjacent rightward recessed portion 21a and the leftward recessed portion 21b becomes shorter, so the top sheet 14 is not strongly stretched. The recessed portion 21 is formed. As a result, there are fewer absorbent bodies 13 being pressed in, so the top sheet 14 is not easily broken. Furthermore, the flexibility of the top sheet 14 and the absorbent body 13 can be maintained, and the top sheet 14 can be prevented from being peeled from the absorbent body 13.

As shown in FIG. 7, the cross-sectional shape in the vicinity of the recess 21 is wider at the open end than at the bottom. Also, unlike in the case of FIG. 8 described below, the values of the pulp amount / SAP amount of the absorbent body 13 are the same in the compressed row 22a after the rolling and the main absorption region 25 without the rolling. Here, the portion indicated by the symbol 13D is a value of the pulp amount / SAP amount in the absorbent body 13. Smaller (ie, the ratio of SAP amount is more) and more SAP after rolling. Rolling section. The part indicated by symbol 13E is that the amount of pulp / SAP in the absorbent body 13 is small and there is much SAP without being rolled. Non-rolled section. That is, multiple SAP. The rolled portion 13D indicates a recessed portion 21 other than the intersection area 23, and more SAP. The non-rolled portion 13E indicates the absorber 13 in the main absorption region 25. Also, more SAP. Rolling section 13D and more SAP. The non-rolled portion 13E is a region where the value of the pulp amount / SAP amount is smaller than that of the absorber 13 in the intersecting region 23 (lower SAP. Rolled portion 13F described below).

Here, the absorbent body 13 mainly includes SAP27 and pulp 29 as described above, and the density is mainly related to the fiber density of the pulp 29. Therefore, more SAP. The rolling section 13D is a state in which the pulp 29 is compressed so that the gap between the pulp 29 is small. On the other hand, more SAP. The gap between the non-rolling section 13E-based pulp 29 and multiple SAP. The state in which the rolled portion 13D is relatively large. Furthermore, in the present invention, the density of the intersection region 23 may be lower than the density of the region where the compressed lines are formed outside the region, but it may be higher than the density or equal to the density.

In addition, since the recessed portion 21 is formed by compressively bonding the top sheet 14 as a synthetic fiber and the absorber 13 whose main component is pulp 29 to form a film, the bottom surface of the recessed portion 21 promotes the diffusion of body fluids in the direction in which the compression line 22 extends. Until the body fluid is absorbed.

As shown in FIG. 8, in the compressed row 22 a, the value of the pulp amount / SAP amount of the absorbent body 13 in the intersecting region 23 is larger than that of the absorbent body 13 (multi-SAP. The value of the pulp amount / SAP amount of the rolling section 13D). Here, the intersecting region 23 indicated by the symbol 13F is that the pulp amount / SAP amount in the absorbent body 13 has a larger value (that is, the ratio of the SAP amount is smaller) and less SAP after being rolled. Rolling section. That is, less SAP. The rolled portion 13F indicates the intersecting region 23 and intersects the intersecting region 23 The area other than the concave portion 21 is larger than the value of the pulp amount / SAP amount.

Furthermore, the absorbent body 13 has a pulp layer in contact with the top sheet 14. The basis weight of the pulp in the pulp layer in the intersection region 23 may be higher than the basis weight of the pulp in the pulp layer in the compression row 22 outside the intersection region 23. form. The basis weight of the SAP of the absorber 13 in the cross region 23 may be lower than the basis weight of the SAP of the absorber 13 in the compressed row 22 outside the cross region 23.

By changing the ratio of the amount of pulp in the compressed row 22 of the absorbent body 13 in this way, the value of the amount of pulp / SAP amount of the absorbent body 13 (less SAP. Rolling section 13F) in the intersecting region 23 can be increased. The SAP 27 is covered with a pulp 29. Therefore, during the embossing process, it is possible to prevent the SAP 27 from abutting against the top sheet 14 and causing the top sheet 14 of the intersection region 23 to be damaged. In addition, by forming SAP27 in the intersecting region 23 so as not to easily touch the top sheet 14, it is possible to prevent the absorbent body 13 in the intersecting region 23 from being easily broken due to the action of the wearer. Furthermore, since the top sheet 14 of the intersecting region 23 is not easily damaged as described above, the absorbent body 13 can be pressed deeper during the embossing process, so that a clear embossed pattern can be formed. By forming a clear embossed pattern, the easiness and flexibility of the diaper 10 can be improved. Furthermore, in the present invention, the basis weight of the pulp in the pulp layer in the intersection area 23 can be made higher than the basis weight of the pulp in the compression layer 22 in the compression row 22 outside the intersection area 23, and the basis weight of the pulp in the intersection area 23 can also be made. The basis weight of the SAP of the absorbent body 13 is lower than the basis weight of the SAP of the absorbent body 13 in the compressed row 22 outside the cross region 23. According to this configuration, the ease of bending and the flexibility of the diaper 10 can also be improved.

In the present embodiment, the aforementioned "less SAP. Rolling section 13F" is provided by, for example, sandwiching the absorber 13 with a mold, thereby applying an impact to the SAP27, and scattering the SAP27.

The "less SAP. Rolling section 13F" is formed by, for example, the following steps (1) to (6). The absorbent pad (the absorptive body containing no chip in the description of this step) is formed by mixing pulp and powdery SAP, and blowing the resulting mixture to a filter such as two forming rollers.

(1) First, an absorbent base pad having a fixed thickness is produced by a first forming roller.

(2) Secondly, the second forming roller is used to intermittently produce only a pulp layer at a portion corresponding to the "less SAP. Rolling section 13F" (for example, parallel to the traveling direction W shown in Fig. 5) (Longitudinal stripes) of the pulp layer, and laminated it on the absorbent base pad produced in step (1).

(3) Thereafter, the absorbent base pad laminated in the step (2) is wrapped with the wrapped chip 15 and the wrapped chip 15 and the absorbent base pad are adhered with a hot-melt adhesive or the like to prepare the absorbent body 13.

(4) The prepared absorbent body 13 is cut to the size of a diaper.

(5) The top sheet 14 is laminated on the absorbent body 13 after the cutting.

(6) The top sheet 14 and the absorber 13 are compressed together by embossing rollers so as to arrange the intersecting regions 23 in the pulp layer.

In this embodiment, the value of the pulp amount / SAP amount of the absorbent body 13 (less SAP. Rolling section 13F) in the intersecting region 23 of the compression row 22 is larger than the absorbent 13 in the compressed row 22 outside the intersecting region 23 (Multi SAP. Rolling section 13D) The value of pulp amount / SAP amount. However, in the present invention, the value of the pulp amount / SAP amount of the absorber 13 can be made larger not only in the intersecting region 23 but also in a region including the periphery of the intersecting region 23. Furthermore, the "periphery of the intersection region 23" is not limited to a compressed region, and may include an uncompressed region. The “compressed area” means, for example, an area that has not been compressed to the same extent as the compressed line 22.

It is known that there are people who have embossed the skin abutment surface side of the absorbent body in order to improve the fit. The embossing process is inclined to extend from the front body to the back body of the diaper. Lattice-shaped compression grooves. The compression groove itself is located at a lower position than the uncompressed portion, so it does not directly contact the wearer's skin, but the vicinity of the lattice point, that is, the periphery of the intersection area of the lattice is stretched with the top sheet and the absorbent body The state of strong extension is fixed. Therefore, there is a case where the powdery SAP in the absorbent body abuts the top sheet. If so, the periphery of the intersecting area of the grid on the skin abutment surface of the top sheet becomes a part that is harder than other parts, such as transmitting the rough feel of SAP as a feel.

Since the periphery of the cross region of the lattice will contact the wearer's skin, it will give the wearer a hard and rough touch to the skin, which is not good. In particular, the diaper is in contact with the soft skin parts such as between the urns, so a soft skin touch is required. If the periphery of the cross part of the lattice is hard, the touch to the skin is not good.

Referring to FIG. 6, the rightward concave portion 21 a is inclined to the right with respect to the traveling direction W, and the leftward concave portion 21 b is inclined to the left. Therefore, as the embossing roller advances in the traveling direction W, the distance between the adjacent rightward recessed portion 21a and the leftward recessed portion 21b becomes shorter as it goes toward the intersection area 23.

When pressed by the embossing roller forming the recessed portion 21, the top sheet 14 is stretched so as to be pulled into the recessed portion 21. Since the adjacent rightward recessed portion 21a and the leftward recessed portion 21b are simultaneously pressed and formed, the top sheet 14 positioned therebetween is stretched from left to right. That is, in FIG. 6, the top sheet 14 is stretched by applying the pull-in force shown by the arrow A simultaneously on the left and right. The shorter the distance between the adjacent rightward concave portion 21a and the leftward concave portion 21b, the less the marginal portion of the top sheet 14 with respect to the pull-in force A is stretched, and therefore the top sheet 14 is gradually extended to a strong state. Therefore, SAP27 in the absorber 13 The top sheet 14 is touched to form a rough feel of the top sheet 14. This can cause irritation to the wearer's skin and is not good.

In another embodiment of the present invention, a region having a larger pulp amount / SAP amount value is provided not only at the intersection region 23 but also at the periphery thereof. According to this configuration, it is possible to suppress the situation where the periphery of the cross region 23 contacts the skin of the wearer, so that the rough feel of the SAP 27 is transmitted as a feel, thereby giving the wearer a hard and rough touch to the skin. As a result, the corners formed in the intersection region 23 do not become hard and feel better, and the surface of the top sheet 14 becomes smooth, so that the wearer's feel can be improved.

Next, an embodiment of an embossed pattern formed by embossing will be described.

As shown in FIG. 5, the embossing pattern of this embodiment is a grid shape formed by arranging a plurality of continuously extending concave portions 21, and is arranged such that the length of the diagonal L1 of one grid is 42 mm (4.2 cm). There are recesses 21. As shown in FIG. 6, the width Q1 of the compressed row 22 is 3 mm, preferably 2 mm to 5 mm. As shown in FIGS. 5 and 6, the embossed pattern of the present embodiment is such that the first compressed line 22 a extends in parallel at an interval S1, and the second compressed line 22 b extends in parallel at an interval S2. Then, the first compressed line 22a and the second compressed line 22b form an embossed pattern in a diagonal grid shape. The lengths S1 and S2 of one side of the lattice in this embodiment are equal to 29.7 mm. The interval of the grid is preferably 13.0 mm or more and 54.0 mm or less.

Here, the depth of the recessed portion 21 of the absorbent body 13 is set to D1, and the thickness of the absorbent body 13 and the top sheet 14 before embossing, that is, the thickness of the main absorbent region 25 including the absorbent body 13 and the top sheet 14 The maximum thickness is D2, the thickness of the diaper 10 of the recess 21 is D3, and the thickness of the absorber 13 of the recess 21 is D4. In this embodiment, the depth D1 of the recessed portion 21 is 7.8 mm. The thickness D2 is 8.0 mm, preferably 5.0 mm to 20.0 mm. The thickness D3 is 1.0 mm, and the thickness D4 is preferably 0.2 mm to 0.6 mm.

If so, the depth D1 of the recess 21 is about 42.5% to 97.5% of the thickness D2. As described above, in the recessed portion 21 in this embodiment, the recessed portion 21 is formed by compressing the absorbent body 13 in the direction of the back sheet 12 during pressing by an embossing roller.

The pulp amount / SAP amount of the absorbent body 13 (less SAP. Rolling section 13F) in the intersecting region 23 of this embodiment is 1.0, and preferably 0.9 to 1.1. In addition, the value of the pulp amount / SAP amount of the absorbent body 13 (multi-SAP. Rolling section 13D) in the area other than the intersection area 23 of the compression line 22 is 0.8, and preferably 0.7 to 0.9.

By forming the absorbent body 13 at such a ratio of the pulp amount, the SAP 27 of the intersecting area 23 can be covered with the pulp 29. Therefore, the intersecting region 23 of the absorbent body 13 in which the grid-shaped embossed pattern is formed is less likely to be broken, and the wearer's feeling of use can be improved.

By forming the recessed portions 21 at such depths and intervals, the groove can be maintained even when weight is applied, and the skin contact surface at the lower part of the diaper can maintain a soft skin feel. Therefore, the diagonal embossed pattern can prevent deformation of the diaper from wrinkling and other deformations to the legs, and can make the skin soft to the touch.

[Modification]

The present invention is not limited to the above-mentioned embodiments, and may be appropriately changed or modified without departing from the technical idea of the present invention.

For example, in the above embodiment, an embossing roller is used for the embossing process. The case has been described, but it is not limited to this method, and it may be a method such as embossing with a plate-shaped embossing plate consistent with the size of the diaper in units of the size of the diaper.

In addition, it is not only a configuration in which the top sheet 14 is arranged after the absorbent body 13 is wrapped with a hydrophilic sheet, but also a configuration in which the top sheet 14 is directly arranged on the absorbent body 13. Moreover, a liquid diffusion sheet which improves liquid diffusibility may be provided between the top sheet 14 and the hydrophilic sheet. With this sheet, the body fluid is more easily diffused. In addition, the hydrophilic sheet may be attached so as to wrap the absorbent body 13 or may be disposed so as to overlap the front surface and the back surface without wrapping the end portion of the absorbent body 13.

In the above-mentioned embodiment, the compressed rows 22 are formed by the recessed portions 21 which are continuous grooves. However, the compressed rows 22 may be formed by discontinuous (for example, intermittent) grooves. In addition, the shape of the concave portion 21 is not limited to the shape shown in this embodiment, and various shapes such as a quadrangle, a circle, an oval, and a triangle can be adopted.

The disposable diaper 10 according to the above embodiment can be applied to either an adult or a child. Moreover, in the said embodiment, although the expanded diaper 10 (a so-called sheet-type diaper) was demonstrated as an example, it can of course be applied to a shorts-type diaper. The absorbent article of the present invention is not limited to diapers, but can be applied to the entirety of other general absorbent articles such as absorbent pads and leaky pads. For example, as shown in FIG. 5, according to the structure of the absorbent body 13 and the top sheet 14, the present invention can also be applied to an absorbent pad and the like, and has the same effect as a diaper.

In the above-mentioned embodiment, only one side of the absorbent body 13 is embossed, but it is not limited thereto, and double-sided embossing may be used. That is, the embossing is performed from both the top sheet 14 side and the bottom sheet 12 side, so that both sides of the front surface and the back surface of the absorbent body 13 are formed with recessed portions 21. With this, the stress is not only concentrated on the absorber The single surface of the front and the back of 13 can clearly form the compressed line 22 even if it is not deeply pressed during embossing, and can maintain the flexibility of the diaper 10.

11‧‧‧ Cover sheet

12‧‧‧ bottom sheet (back sheet)

13‧‧‧ Absorber

13D‧‧‧More than SAP. Rolling section

13F‧‧‧less SAP. Rolling section

14‧‧‧ top sheet (front sheet)

15‧‧‧Pack of chips

21‧‧‧ recess

23‧‧‧ cross area

27‧‧‧SAP

29‧‧‧ Pulp

Claims (9)

An absorbent article comprising a liquid-permeable front sheet, a liquid-impermeable back sheet, and an absorber disposed between the front sheet and the back sheet and including pulp and SAP, which is characterized in that The method comprises the following: on the front sheet side of the absorber, a plurality of compressed lines which are formed by compressing the front sheet and the absorbent body and which are formed by a plurality of recessed portions, are arranged to intersect each other. The value of the pulp amount / SAP amount of the absorbent body in the region is larger than the pulp amount / SAP amount of the absorbent body in the compressed row outside the region including the intersecting region. The absorbent article according to claim 1, wherein the absorbent body has a pulp layer in contact with the front sheet, and the basis weight of the pulp of the pulp layer in the area including the intersection area is higher than the area including the intersection area The basis weight of the pulp in the pulp layer other than the above compression line. If the absorbent article of claim 1 or 2, the basis weight of the SAP of the absorbent body in the area including the intersecting area is lower than the SAP basis of the absorbent body in the compression line other than the area including the intersecting area. weight. The absorbent article according to claim 1 or 2, wherein the area including the intersection area includes the periphery of the intersection area. The absorbent article according to claim 3, wherein the area including the intersection region includes a periphery of the intersection region. The absorbent article according to claim 1 or 2, wherein the plurality of recesses are continuous grooves. The absorbent article according to claim 3, wherein the plurality of recesses are continuous grooves. The absorbent article according to claim 4, wherein the plurality of recesses are continuous grooves. The absorbent article according to claim 5, wherein the plurality of recesses are continuous grooves.