JP6080263B2 - Absorbent articles - Google Patents

Description

  The present invention relates to absorbent articles such as sanitary napkins and incontinence pads.

Conventionally, in the absorbent article having a long length in the longitudinal direction along the wearer's front-rear direction, like a sanitary napkin for night suitable for use at bedtime, there is a gap with the wearer's skin, In the sleeping position, the liquid may flow along the surface of the skin and flow into the buttocks, leading to liquid leakage.
Therefore, there is known a technique for improving the fit to the body by forming a partially thick part in the absorbent body of the absorbent article and forming a raised part on the skin facing surface (Patent Document 1). reference).
Moreover, the technique which provides the surface structure and protrusion part which protrude toward the skin side in the surface turned to a wearer's skin side is also proposed (refer patent document 2, 3).

JP 2006-239162 A JP 2003-79662 A JP-A-11-33054

However, even if it is an absorbent article which formed the middle and high part like patent documents 1, when wearing an absorptive article, the center line extended in the front-and-rear direction of a body, and the center line extended in the longitudinal direction of a middle and high part It has been found that when such a positional deviation occurs, the effects of the middle and high portions cannot be sufficiently obtained, and inconveniences such as side leakage may occur.
In addition, in conventional absorbent articles, including the absorbent articles of Patent Documents 2 and 3, when receiving pressure from the left and right sides by the wearer's thigh during wearing, both sides of the absorbent body are wide. Compressed in the direction, the volume of liquid that can be absorbed is reduced, and the fit to the body tends to be reduced, which tends to cause leakage.

  The subject of this invention is providing the absorbent article which can eliminate the fault which the prior art mentioned above has.

  The present invention includes a skin-side sheet, a non-skin-side sheet, and an absorbent core having a shape that is long in the front-rear direction of the absorbent article, and is disposed between the two sheets and disposed opposite to the wearer's liquid excretion part. An absorbent article having a rear portion disposed behind the excretory portion and the excretory portion, wherein the absorbent core is disposed at a standard absorption region and a central portion in the width direction of the excretion portion opposed portion. The excretion part middle and high region having a thickness larger than that of the standard absorption region, the excretion part middle and high region, the central thick part that is long in the longitudinal direction of the absorbent core, and the central thick part The present invention provides an absorbent article having side thick portions that bulge outward from both side edges along the longitudinal direction.

  The absorbent article of the present invention exhibits sufficient absorption performance even if the mounting position is somewhat shifted, and is less likely to cause twisting, and is unlikely to cause inconvenience such as a sense of incongruity or liquid leakage.

FIG. 1 is a perspective view showing a sanitary napkin according to a first embodiment of the present invention. FIG. 2 is a perspective view showing an absorbent core of the sanitary napkin of FIG. 3 is a cross-sectional view taken along line III-III in FIG. 4 is a cross-sectional view taken along line IV-IV in FIG. FIG. 5 is a schematic plan view of the absorbent core of the sanitary napkin of FIG. 6 (a) and 6 (b) are schematic views showing a cross-section along the circumferential direction of the fiber drum preferably used for manufacturing the absorbent core of the sanitary napkin shown in FIG. FIG. 6A is a diagram illustrating a state before the absorbent core forming material is deposited in the accumulation recess, and FIG. 6B is a diagram illustrating a state in which the absorbent core formation material is deposited in the accumulation recess. 7A to 7F are plan views showing an absorbent core according to another embodiment of the present invention.

The present invention will be described below based on preferred embodiments with reference to the drawings.
A sanitary napkin 1 (hereinafter also simply referred to as napkin 1) as a first embodiment of the absorbent article of the present invention is a night napkin suitable for use at bedtime.
As shown in FIG. 1, the napkin 1 has an absorbent main body 6 that is long in the front-rear direction, a pair of wing portions 7, 7, and a pair of rear flap portions 8, 8. With respect to absorbent articles such as sanitary napkins, the “front-rear direction” is a direction that coincides with the wearer's front-rear direction when worn.
Napkin 1 has, at its front and rear direction X, the front portion A, discharge泄部opposing portions has B and rear station C, a pair of wing sections 7 on the left and right sides of the absorbent body 6 in discharge泄部facing portion B , 7, a pair of rear flap portions 8, 8 on the left and right sides of the absorbent main body 6 in the rear portion C, which is a napkin that is preferably used for so-called night use. The night napkin is assumed to be used at bedtime, and preferably has a total length of 30 cm or more.

In the absorbent article of the present invention, the excretion portion facing section B, the center in the width direction, a portion of the liquid excretion portion of the wearer (vaginal opening or the like) is opposed, front portion A that exhaust泄部a portion that is disposed from the opposite part B wearer's front (ventral), rear part C is a portion which is arranged on the back side of the wearer than the discharge泄部facing portion B. When the excretory part facing part B has a wing part like the napkin 1 of the present embodiment, the wing part is arranged in the front-rear direction of the absorbent article (the same as the longitudinal direction of the absorbent main body, the X direction in the figure). It is the area | region (area | region pinched | interposed into the base of the one side of the front-back direction of a wing part, and the base of the other side). The excretion part opposing part in the absorbent article which does not have a wing part is the transverse direction (width direction of an absorbent article, in the figure) generated when the absorbent article is folded into a tri-fold individual form. The two folding lines (not shown) crossing in the Y direction) are areas surrounded by the first folding curve and the second folding curve counted from the front end in the longitudinal direction of the absorbent article. Moreover, in this specification, a skin opposing surface is a surface turned to a wearer's skin side at the time of wear in an absorbent article or its component, and a non-skin opposing surface is at the time of wear in an absorbent article or its component. It is a surface directed to the opposite side (clothing side) of the wearer's skin.

As shown in FIG. 3 or 4, the napkin 1 is disposed between the skin-side sheet 2 that forms the skin-facing surface, the non-skin-side sheet 3 that forms the non-skin-facing surface, and both the sheets 2 and 3. An absorbent core 4 is provided. The skin-side sheet 2 includes a liquid-permeable surface sheet 2a and a pair of three-dimensional guard forming sheets 2b and 2b joined to both sides thereof. The liquid permeable top sheet 2 a is arranged at the center in the width direction of the absorbent main body 6 so as to cover the entire length of the absorbent main body 6. The three-dimensional guard forming sheet 2b has a folded portion 21 that is located on the center side in the width direction of the absorbent main body 6 and is folded outward, and is joined slightly outward from the folded portion 21 in the width direction. In the part 22, it is joined on the surface sheet 2a. Stereoscopic guard forming sheet 2b has an elastic member 24 for stereoscopic guard formed in the vicinity of the side edge portion 23 forming a free end of the three-dimensional guard, when worn, the contraction force of the elastic member 24, discharge A space between the joint portion 22 and the side edge portion 23 in the excretory portion facing portion B stands up toward the wearer's skin to form the three-dimensional guard 10. The three-dimensional guard 10 can stand at least in the region where the excretion portion middle-high region 40 described later is present. In the napkin 1 of this embodiment, the most part and the rear part C of the front portion A, the three-dimensional guard forming sheet 2b has been made with the non-raised portions, not standing fixed to the surface sheet side.

  The pair of wing portions 7, 7 and the pair of rear flap portions 8, 8 are composed of a three-dimensional guard forming sheet 2 b and a non-skin side sheet 3 extending from both side edges of the absorbent core 4. A wing portion adhesive portion 71 for fixing to the non-skin facing surface of the crotch portion of the shorts is provided on the surface made of the non-skin side sheet 3 of each of the pair of wing portions 7, and the non-skin facing surface of the absorbent main body 6 Is provided with a main body adhesive portion (not shown) for fixing the main body 6 to the inner surface of the shorts. The rear flap 8 is arranged on the inner surface of the shorts (surface directed to the skin side) when worn. It is preferable that an adhesive portion for fixing to the inner surface of the shorts is also provided on the surface of the rear flap portion 8 made of the non-skin side sheet 3. The skin-side sheet 2 and the non-skin-side sheet 3 are joined to each other with an adhesive from the periphery of the absorbent core 4 and are joined to each other at the periphery of the napkin 1 by heat sealing.

  The absorbent core 4 in the napkin 1 is composed of a fiber assembly made of a fiber material such as pulp fiber or a fiber assembly in which a superabsorbent polymer is held. The upper and lower surfaces of the absorbent core 4 are covered with a core wrap sheet (not shown) made of tissue paper or a water-permeable nonwoven fabric. The core wrap sheet is used for the purpose of preventing leakage of the forming material of the absorbent core or improving the shape retention of the absorbent core. Between the skin side sheet 2 and the core wrap sheet that covers the skin facing surface side of the absorbent core 4 and between the non-skin side sheet 3 and the core wrap sheet that covers the non skin facing surface side of the absorbent core 4. The gaps are preferably joined to each other by a pattern-coated adhesive such as dots, spirals or stripes.

As shown in FIG. 2, the absorbent core 4 in the napkin 1 has a shape that is long in the same direction as the front-rear direction X of the napkin 1. Therefore, the longitudinal direction of the absorbent core 4 is the same direction as the front-rear direction X of the napkin 1, and the lateral direction of the absorbent core 4 is the same direction as the direction orthogonal to the front-rear direction X of the napkin 1.
Moreover, the absorptive core 4 has the standard absorption area | region 43 and the excretion part middle-high area | region 40 whose thickness is larger than it as shown in FIG. In the napkin 1, the standard absorption region 43 exists in the front part A, the excretory part facing part B, and the rear part C. The excretion part middle-high area 40 is arranged at the central part in the width direction Y of the excretion part facing part B of the napkin 1.
Further, as shown in FIGS. 2 and 5, the excretion portion middle-high region 40 includes a central thick portion 41 having a vertically long plan view shape in the longitudinal direction X of the absorbent core, and a longitudinal direction of the central thick portion 41. Side thick portions 42, 42 that bulge outward from the respective side edges along the line. In addition, a rear middle-high region 49 having a thickness larger than that of the standard absorption region 43 is provided at the center of the rear portion C in the width direction Y, similarly to the central thick portion 41 in the excretion portion middle-high region 40.

  In the napkin 1, the center thick part 41 of the excretion part middle-high region 40 is present under the top sheet 2 a, so that the skin side of the wearer is placed at the center in the width direction of the skin facing surface in the excretion part facing part B. Is formed at the center in the width direction of the skin facing surface at the rear portion C by the presence of the rear middle / high region 49 below the top sheet 2a. A rear raised portion 12 protruding toward the skin side is formed. It is preferable that the rear bulge portion 12 is disposed to face the wearer's crack when the napkin 1 is worn.

The excretion part middle-high area 40 is an area thickened as compared with the standard absorption area 43, that is, an area thicker than the standard absorption area 43, and is formed in the excretion part facing part B.
As shown in FIG. 5, the central thick part 41 of the excretion part middle-high region 40 has linear side end parts 41 s and 41 s extending in the longitudinal direction X of the absorbent core 4, and the front end side in the longitudinal direction X and The rear end side has a shape in which the length in the width direction Y gradually decreases forward or backward. More specifically, the medium Hisashiniku thick portion 41, arcuate front and rear ends 41a, has 41b, as a whole, has an oval-shaped plan view shape having a major axis in the longitudinal direction X .

Although the central thick part 41 of the excretion part middle and high region 40 may be formed only in the excretion part facing part B, as shown in FIG. 1 or FIG. 2, a part of the rear part C from the excretion part facing part B. It is preferable that it extends over.
Further, the central thick portion 41 in the present embodiment is divided by a groove portion 44 extending in the width direction of the absorbent core 4 and a groove portion 46 extending in the longitudinal direction of the absorbent core 4, thereby the central thick portion 41. A plurality of small absorbing portions 45 are formed. In the central thick part 41 in the present embodiment, five small absorbent parts 45 are arranged along the longitudinal direction X of the absorbent core 4, and the small absorbent parts 45 are arranged along the width direction Y of the absorbent core 4. Two pieces are arranged side by side, and a total of ten small absorbing portions 45 are formed.

  The standard absorption region 43 is a region other than the increased middle-high region (the excretion portion middle-high region 40, the rear middle-high region 49). In the present embodiment, the standard absorption region 43 is formed between the peripheral region of the absorbent core 4 that collectively surrounds the excretion portion middle-high region 40 and the rear middle-high region 49, and the excretion portion middle-high region 40 and the rear middle-high region 49. It is distributed in the middle region 50 located. The standard absorption region 43 basically has a substantially uniform thickness, and the standard absorption region 43 in the present embodiment also has a substantially uniform thickness except for the groove portions 51 and 52 and the linear groove 60 described later.

The thickness of the excretion part middle-high area 40 is the thickness of parts other than the groove parts (groove part 44, groove part 46). For example, the thickness of the central thick part 41 is the same as the thickness of the small absorption part 45. As shown in FIG. 2, the absorbent core 4 in the present embodiment includes a groove 51 extending in the width direction Y of the absorbent core 4 and a groove 52 extending in the longitudinal direction Y of the absorbent core 4 in the standard absorbent region 43. Although formed, the thickness of the standard absorbent region 43 compared with the thickness of the excretory middle / high region 40 and the rear middle / high region 49 is preferably a groove portion such as the groove portion 51 and the groove portion 52 in the peripheral region of the absorbent core 4. It is the thickness in the part which does not.
Moreover, when the leak-proof groove | channel from a surface sheet to an absorber is provided like the linear groove | channel 60 mentioned later, standard absorption area | region 43, middle / high area (excretion part middle / high area 40, back middle / high area 49), etc. And when measuring the thickness of each part of an absorptive core, it measures so that such a leak-proof groove part may not be included.

The thickness of the central thick part 41 is standard from the viewpoint of improving the liquid absorption in the excretory part facing part B by forming the front raised part 11 protruding toward the skin on the skin facing surface of the napkin 1. The thickness of the absorbent region 43 (preferably the thickness of the peripheral region of the absorbent core 4) is preferably 150% (that is, 1.5 times, the same shall apply hereinafter) or more, more preferably 200% or more. Preferably, it is 500% or less, more preferably 300% or less, and preferably 150% or more and 500% or less, more preferably 200% or more and 300% or less, from the viewpoint of suppressing a sense of discomfort during wearing. The difference in thickness (the former-the latter) between the thickness of the central thick portion 41 and the thickness of the standard absorbent region 43 (preferably the thickness of the peripheral region of the absorbent core 4) is preferably 2 mm or more, more preferably 3 0.5 mm or more, preferably 8 mm or less, more preferably 6 mm or less, and preferably 3 mm or more and 8 mm or less, more preferably 3.5 mm or more and 6 mm or less. The preferable thickness ratio and the difference in thickness are the same for the thickness of the rear middle-high region 49 and the thickness of the standard absorbent region 43 (preferably the thickness of the peripheral region of the absorbent core 4).
In addition, it is preferable that the relationship of the thickness is in the entire range of the central thick portion 41, but in the case where an inclination is provided in the thickness direction of the central thick portion 41, the thickest portion has the above. It only has to be a relationship.

The thickness of each part of the absorbent core is measured by the following method. In addition, when the absorptive core is coat | covered with the core wrap sheet | seat like the napkin 1 of this embodiment, the thickness of each part of an absorptive core is the state in which this absorptive core is wrapped in the core wrap sheet | seat. taking measurement.
<Measurement method of thickness of each part of absorbent core>
The absorptive core, which is the object to be measured, is placed in a horizontal place so as not to be wrinkled or bent, and the thickness under a load of 5 cN / cm ² is measured. A thickness meter PEACOCK DIAL UPRIGHT GAUGES R5-C (manufactured by OZAKI MFG.CO.LTD.) Was used for measuring the thickness in the present invention. At this time, a circular plate or a square plate (acrylic plate having a thickness of about 5 mm) in plan view is disposed between the tip of the thickness meter and the measurement portion of the measurement object, and the load is 5 cN / cm ² . Adjust the size of the plate so that

  The side thick portions 42 and 42 are thicker than the thickness in the standard absorption region 43, similarly to the central thick portion 41. In the present embodiment, as shown in FIG. 2 and FIG. 3, a groove 47 extending in the width direction of the absorbent core 4 is formed in each of the side thick portions 42, 42. A plurality of small absorbing portions 48 are formed in each of the thick wall portions 42 and 42.

  The thickness of the side thick portion 42 is preferably 120% or more, more preferably 150% or more of the thickness of the standard absorption region 43 (preferably the thickness of the peripheral region of the absorbent core 4), and preferably 200%. % Or less, more preferably 180% or less, preferably 120% or more and 200% or less, more preferably 150% or more and 180% or less. Further, the difference in thickness (the former-the latter) from the thickness of the standard absorbent region 43 of the side thick portion 42 (preferably the thickness of the peripheral region of the absorbent core 4) is preferably 2.4 mm or more, more preferably 4 mm or more, preferably 7.2 mm or less, more preferably 6.4 mm or less, and preferably 2.4 mm or more and 7.2 mm or less, more preferably 4 mm or more and 6.4 mm or less. The thickness of the side thick portion 42 when the side thick portion 42 includes the groove 47 described above or the linear groove 60 (vertical groove 61) described later is the thickness of the portion other than the groove and the linear groove. The thickness of the standard absorption region 43, which means the thickness and is compared with the thickness of the side thick portion 42, is preferably the thickness at the portion where the groove portion such as the groove portion 51 and the groove portion 52 does not exist in the peripheral region of the absorbent core 4. is there.

  The excretion part middle high region 40 and the rear middle high region 49 in the present embodiment are formed by increasing the basis weight of the absorbent core forming material (hereinafter also referred to as “core material”) as compared to the standard absorbent region 43. . That is, the basis weight of the core material is larger than the basis weight in the standard absorption region 43 in the portion other than the groove portions 44, 46, 47, 53 in the excretion portion middle / high region 40 and the rear middle / high region 49. Since the absorbent core 4 in the present embodiment has a difference in the basis weight of the core material to provide a thickness difference, a case where a thickness difference is provided by compressing a part of the absorbent core having a uniform basis weight is described. Unlike the absorbent core 4, the standard absorbent region 43 is flexible, and is flexible as a whole.

The thickness of the posterior middle-high region 49 is formed from an absorbent core from the viewpoint of improving the fit to the body (preferably rupture) by forming a ridge protruding toward the skin on the skin facing surface of the napkin 1. 4 of the standard absorption region 43 is preferably 130% or more, more preferably 180% or more, preferably 300% or less, more preferably 230% or less, and preferably 130% or more and 300%. % Or less, more preferably 180% or more and 230% or less. The difference in thickness between the rear convex region 4 9 the thickness of the peripheral region 43 of the thickness and the absorbent core 4 (the former - the latter) is preferably 0.9mm or more, more preferably not less than 2.7 mm, also The thickness is preferably 4.7 mm or less, more preferably 4.0 mm or less, and preferably 0.9 mm or more and 4.7 mm or less, more preferably 2.7 mm or more and 4.0 mm or less.

  Moreover, the side thick part 42 in this embodiment is formed by increasing the basic weight of a core material rather than the standard absorption area | region 43, respectively. That is, the basis weight of the core material is larger than the basis weight in the standard absorption region 43 in the portions other than the groove portions 47 in the side thick portion 42.

Moreover, the center thick part 41 in the napkin 1 of this embodiment is thicker than the side thick part 42, and the basic weight of a core material is high. The thickness of the central thick portion 41 is preferably 120% or more, particularly 150% or more of the thickness of the side thick portion 42, from the viewpoint of achieving both absorption performance and a feeling of wear, and is preferably 300% or less, particularly 250. % it is preferable from the viewpoint of not easily feel uncomfortable due to the step in the wearer less. Specifically, the thickness of the central thick part 41 is preferably 120% or more and 300% or less, particularly 150% or more and 250% or less of the thickness of the side thick part 42.

It is preferable that the excretion part middle-high area 40 has an inclination in which the thickness is reduced from the central part in the width direction toward both side parts from the viewpoint of giving a flexible feel when worn. In such a case, the relation of the thickness ratio between the central thick part 41 and the side thick part 42 described above may be such that the thickest part in each thick part is the same. Further, most large thickness portion of the central thick portion 41, the ratio to the thickness of the thickest a small portion of the side thick portion 42 (the former / the latter) is, no gap contact as possible domed section the excretory part Therefore, it is preferably 1.3 or more, particularly 1.6 or more, and is preferably 4 or less, particularly 3 or less, from the viewpoint of making it difficult to give an uncomfortable feeling when worn. More specifically, the ratio of the maximum thickness part of the central thick part 41 to the minimum thickness of the side thick part 42 (the former / the latter) is 1.3 or more and 4 or less, particularly 1.6 or more and 3 or less. It is preferable.

In the absorbent core 4 of the present embodiment, the groove portions 44 and 46 in the central thick portion 41 and the groove portion 47 in the lateral thick portion 42 are all made of the core material, the central thick portion 41 and the lateral portions. It is formed to be smaller than other parts in the thick part 42. That is, in the central thick portion 41, the basis weight of the core material in the groove portions 44 and 46 is lower than the basis weight of the core material in the small absorbent portion 45, and the side thick portion 42 is in the groove portion 47. The basis weight of the core material in is smaller than the basis weight of the core material in the small absorbent portion 48.
Further, unlike the case where a groove portion formed by compressing a part of a portion having a uniform basis weight is provided, the central thick portion 41 has a density of the core material in the groove portions 44 and 46 higher than that in the small absorption portion 45. Also, the density of the core material in the groove 47 is lower than the density in the small absorption part 48 in the side thick part 42 as well.

  The basis weight of the core material in the grooves 44, 46, 47, 53 is cut by cutting the boundary between the groove and the other parts, and the mass of the narrow sample is measured on the surface of the sample facing the skin. Divide by area. The basis weight of the part other than the groove part is obtained by dividing the mass of the sample obtained by cutting out the part other than the groove parts 44, 46, 47, 53 by the area of the surface of the sample facing the skin.

  In addition, although the napkin 1 of this embodiment has the groove part 44,46,47,51-53 formed by reducing the basic weight in the skin opposing surface of the absorptive core 4, A continuous layer 59 that is not divided by the grooves is formed on the non-skin facing surface side.

According to the napkin 1 of this embodiment, the absorbent core 4, exhaust泄部the facing portion B, excretory convex region consisting of the side thick parts 42 Metropolitan positioned and on both sides of the central thick portion 41 40, the portion having the central thick portion 41 fits into the wearer's liquid excretion part, and excretion fluid such as menstrual blood excreted from the liquid excretion part is rapidly absorbed. In addition, when the napkin 1 is fixedly attached to clothing such as shorts, the center line extending in the front-rear direction of the body of the napkin 1 and the center line extending in the longitudinal direction of the central thick portion 41 do not coincide with each other. However, the presence of the side thick portions 42 and 42 makes it easy to suppress leakage from the width direction, and the side thick portion 42 is firmly attached to the excretory portion central region B. Performance is expressed and inconveniences such as a decrease in absorption performance due to excretion point deviation are unlikely to occur.
Further, due to the presence of the side thick portions 42, 42, both sides of the absorbent core 4 and both sides of the absorbent main body 6 can be applied even when the wearer's thighs receive pressure from the left and right sides during wearing. Is less likely to be twisted, and the absorbent core 4 shrinks so as to wave in the width direction, or irregular wrinkles occur, resulting in a decrease in the volume of liquid that can be absorbed, a decrease in fit to the body, and an uncomfortable feeling. Occurrence is difficult to occur.
As described above, the sanitary napkin 1 of the present embodiment exhibits sufficient absorption performance even if the mounting position is slightly shifted, and is less likely to be twisted, so that inconveniences such as a sense of incongruity and liquid leakage are less likely to occur.

  Moreover, in the napkin 1 of this embodiment, since the center thick part 41 has the groove parts 44 and 46 and is divided | segmented into the some small absorption part 45, it fixes to clothes, such as shorts of the napkin 1, and fixes. When attached, it deforms flexibly. Moreover, since the basis weight of the core material in the groove portions 44 and 46 is lower than the basis weight of the core material in the small absorbent portion 45, the central thick portion 41 is compared with a case where the center thick portion 41 has a groove portion formed by compression by embossing or the like. Thus, it functions not only as a bend along the groove but also as a bent portion that is flexibly deformed with a high degree of freedom. Thereby, the sanitary napkin 1 becomes more excellent in the followability with respect to a wearer's operation | movement.

Moreover, since the side thick part 42 has the groove part 47 and is divided | segmented into the some small absorption part 48, it is possible to carry out a flexible deformation | transformation also in the right-and-left both sides in an excretion part opposing part. Moreover, when it is the side thick part 42 whose basic weight is smaller than the center thick part 41 like this embodiment, the force from the right and left outer sides at the time of wear turns toward the inner side of the napkin 1 Even when it is added, the side thick part 42 is deformed flexibly so as to press the central absorbent part against the wearer's skin. In addition, since the basis weight of the core material in the groove portion 47 is lower than the basis weight of the core material in the small absorbent portion 48, the side thick portion 42 has a groove portion formed by compression by embossing or the like. Te, it is possible to tell the central thick portion 4 1 while buffering the force inward in the width direction obliquely outwardly exerted from the wearer. Accordingly, while preventing the twist of the central thick portion 4 1, and curved with a moderate force to the wearer's skin side, since the contact, becomes capable of suppressing uncomfortable feeling. Thereby, the sanitary napkin 1 becomes more excellent in absorption performance while giving a followability to the wearer's movement and a soft wearing feeling.

As shown in FIGS. 1 and 4, the surface sheet 2 a and the absorbent core 4 that are the skin-side sheets 2 are provided on the skin-facing surface (surface on the surface sheet 2 a side) of the absorbent main body 6 in the napkin 1 of the present embodiment. Is formed as a linear groove 60 that is integrally recessed toward the non-skin-side sheet 3 side, and the linear groove 60 is formed on both outer sides of the central thick portion 41 in the longitudinal direction of the absorbent core 4. A longitudinal groove 61 extending along the direction X, a front groove 62 and a rear groove 63 formed in the front part A and the rear part C so as to extend in the width direction Y, respectively, a central thick part 41 and a rear middle-high area 49. the intermediate region 5 0 between, and an intermediate transverse groove 64 formed so as to extend in the width direction Y. The linear groove is formed by pressing (so-called embossing) with or without heat. In the linear groove, the topsheet 2a and the absorbent core 4 are integrated (coupled). The napkin 1 and the absorbent core 4 of the present embodiment are formed symmetrically with respect to a center line (not shown) that bisects the absorbent main body 6 in the width direction Y, as shown in FIG. Has been.

And in the napkin 1 of this embodiment, as shown in FIG. 1, the said pair of vertical groove | channel as the linear groove | channel 60 by which the surface sheet 2a (skin side sheet | seat 2) and the absorptive core 4 were integrated by pressing. 61 and 61 are formed so that the above-mentioned side thick parts 42 and 42 may be cut in the longitudinal direction X of the absorptive core 4, respectively.
The side thick portions 42, 42 are absorbed by the longitudinal grooves 61, 61 that are linear grooves in which the top sheet 2a (skin-side sheet 2) and the absorbent core 4 are compressed and integrated. twisted described above on both sides of the side portions and the absorbent body 6 sexual core 4 is hardly more to occur, also twist Ya by the force exerted toward the outside in the width direction when worn against the central thick portion 4 1 inward Generation of excessive pressing force on the skin can be suppressed. For this reason, the napkin 1 is further improved in the ability to suppress a decrease in absorption performance due to twisting at the time of wearing. Each of the lateral thick portions 42 preferably has a portion where the longitudinal grooves 61 are not formed on both sides of the absorbent core 4 in the width direction Y, and sandwiches the longitudinal grooves 61. It is more preferable that the vertical groove 61 is formed in the vicinity of the central portion that is divided into two in the direction Y. The longitudinal grooves 61 are not limited to those completely parallel to the longitudinal direction X of the absorbent core 4.

  In addition, as shown in FIG. 1, the intermediate horizontal groove 64 in this embodiment is a shape curved convexly toward the rear, and the central thick part 41 has linear grooves formed in the front, rear, left and right. Further, the pair of vertical grooves 61, the front groove 62, and the rear groove 63 form an annular linear groove around the central thick portion 41 and the rear middle / high region 49. Therefore, liquid leakage from the periphery of the napkin 1 is effectively prevented.

What is necessary is just to set the width | variety (length of the direction orthogonal to a length direction) and depth of a linear groove similarly to the linear groove in this kind of absorbent article. In this embodiment, the width of the linear groove is wider than the width of the grooves 44, 46, 47, 53 of the absorber. In addition, “linear” in the linear groove is not limited to a straight line in the plan view, but includes a curved line, and each line may be a continuous line or a broken line. For example, the linear groove may be composed of a row formed by a large number of discontinuous point embosses.

In the napkin 1 of this embodiment, in the excretion part facing part B, the groove | channel 52 which reduced the basic weight of an absorptive material exists in the absorber of the position of the width direction outer side rather than the longitudinal groove 61. FIG. When a force directed from the outside in the width direction to the inside is applied at the excretory part facing part B, the absorbent body side part is flexibly deformed by the groove 52, but the deformation exerts an influence on the inside from the longitudinal groove 61 by the longitudinal groove 61. It has become difficult. For this reason, the center thick portion 41 is less likely to be twisted and easily protrudes in an appropriate shape toward the wearer's skin, which is preferable from the viewpoint of achieving both wearing feeling and absorption performance. Incidentally, since the grooves 52 in this embodiment is provided in a standard absorption region, there is a high deformation suppressing effect of the vertical grooves 61, the grooves 52 may be provided on the side thick portion 42.

The lateral thick part 42 in the present embodiment exists in the excretory part facing part B, which is an area having the pair of wing parts 7, 7 in the front-rear direction X of the napkin 1. Here, the presence in the excretion part facing part B means that the entire lateral thick part 42 is present in the excretion part facing part B.
Since the side thick part 42 is present in the excretory part facing part B, the wing parts 7 and 7 are easily folded and attached to the shorts, and the excretion part facing part B of the napkin 1 is worn by the wearer. It becomes easy to arrange appropriately in the excretion part. Further, the folding operation of the wing parts 7 and 7 and the wearing of the shorts generate a force that the side thick part 42 pushes the central thick part 41 inward in the width direction, and the central thick part 41 is excreted by the wearer. It becomes easy to adhere to the part. For this reason, the leakage suppression effect from the width direction side of excrement becomes high.

Further, as shown in FIG. 5, the side thick portion 42 in the present embodiment decreases in length in the longitudinal direction of the absorbent core 4 toward the outside in the width direction Y of the absorbent core 4. Shape. More specifically, the absorbent core 4 has a substantially trapezoidal shape in plan view.
When the side thick part 42 has a shape in which the length Lx (see FIG. 5) in the longitudinal direction of the absorbent core 4 decreases toward the outside in the width direction Y of the absorbent core 4, the excretory part Without greatly impairing the flexibility of the facing portion B, it is difficult to give the wearer a sense of incongruity, and it is possible to prevent a decrease in absorption performance due to the displacement of the napkin 1 during wearing.
The shape in which the length Lx in the longitudinal direction of the absorbent core 4 decreases toward the outside in the width direction Y of the absorbent core 4 is not limited to the shape shown in FIG. 5, and FIG. The shape as shown in FIG.
The side thick portion 42 shown in FIGS. 7B and 7C is formed with an arcuate tip in the protruding direction, and the side thickness shown in FIGS. 7A and 7D. The thick part 42 has a linear edge along the longitudinal direction X of the absorbent core at the tip in the protruding direction.
It is preferable that the side thick portion 42 has a straight edge at the tip in the protruding direction from the point that twisting can be prevented even when a force from the outside in the width direction is applied to the inside.

  Moreover, it is preferable that the side thick part 42 has the position of the front-end | tip of a protrusion direction in the longitudinal direction X of the absorptive core 4 and the position of the front-end | tip of the protrusion direction of a wing part in the longitudinal direction X. Specifically, when the wing part 7 is symmetrical in the longitudinal direction, the front end portion of the edge in the width direction of the side thick part 42 is located at the center position in the longitudinal direction X of the wing part 7. It is preferable. On the other hand, when the wing part 7 is asymmetrical in the longitudinal direction, the position of the tip in the protruding direction of the side thick part 42 overlaps in the longitudinal direction at the outermost position in the width direction of the wing part 7. It is preferable. With this arrangement, the wing part 7 can be easily bent and fixed to the shorts, so that the excretory part facing part B can be easily attached to the excretion part of the wearer. It is preferable from the point. The position of the distal end in the protruding direction in the side thick portion 42 is a portion located on the outermost side in the width direction. However, as in the present embodiment, the longitudinal direction X of the absorbent core is positioned at the distal end in the protruding direction. If there is a straight edge along the line, the center position in the longitudinal direction X of the straight line portion is used. On the other hand, the center position of the wing part 7 in the longitudinal direction X is a position that bisects the distance between a pair of roots of each wing part 7. The expression that the position of the tip of the side thick part 42 is located at the center position in the longitudinal direction X of the wing part 7 includes the longitudinal direction of the wing part 7 at the position of the tip of the side thick part 42. The deviation from the center position of X includes within 10% of the distance between the roots of the wing part.

  Moreover, in the napkin 1 of this embodiment, as shown in FIG. 5, the central position 42c of the side thick part 42 in the longitudinal direction X of the napkin 1 is the central thick part in the longitudinal direction X of the napkin 1. 41 is located in front of the central position 41c. The female excretion part (vaginal opening) is located in the crotch, but for example, in the case of a night napkin, leakage from the rear end of the napkin often becomes a problem at bedtime. In this way, by forming the side thick part 42 in front of the central thick part 41, the central thick part 41 is brought into close contact with the excretion part, and the absorption performance in the excretion part facing part B is improved. The central thick part 41 that is narrower than the excretory part facing part B on the rear side is easy to form a close contact state along the curved shape of the wearer up to the vicinity of the front end of the fracture, and as a result, the rear end part of the napkin 1 It is preferable from the point which can suppress the leakage from. The distance L3 between the central positions 41c and 42c in the longitudinal direction X of the central thick part 41 and the lateral thick part 42 is preferably 3% or more, more preferably 5% or more of the total length L2 of the central thick part 41. In addition, it is preferably 40% or less, more preferably 20% or less.

The central thick portion 41 has a ratio (L2 / L4) of the length L2 of the major axis to the length L4 of the minor axis (L2 / L4) of preferably 1.5 or more, more preferably 2 or more. Is 15 or less, more preferably 10 or less. The lengths of the long axis and the short axis indicate the distances at the longest positions in the longitudinal direction and the width direction of the central thick portion 41, respectively.
Further, the total length L1 in the longitudinal direction X of the lateral thick part 42 is preferably 10% or more, more preferably 20% or more of the full length L2 of the excretion part middle / high region 40 or the central thick part 41, Preferably it is 80% or less, More preferably, it is 70% or less, Preferably it is 10% or more and 80% or less, More preferably, it is 20% or more and 70% or less.

  Moreover, in the absorptive core 4 in this embodiment, as shown in FIG.2 and FIG.4, between the central thick part 41 and the side thick parts 42 and 42, the central thick part 41 and the side part are provided. A groove 53 having a low basis weight, which is lower than the basis weight (basis weight of the core material) of the thick portions 42, 42, is formed. Therefore, when a force directed from the outside in the width direction to the inside is applied, it can function as a buffer region that enables flexible deformation and prevents the force from being directly transmitted to the central thick portion 41. Can be prevented.

  Moreover, the whole absorptive core 4 in this embodiment is integrally molded. “Integrally molded” means that the same material is used to form parts in one process, unlike the case where members manufactured in different processes are joined by means of bonding, such as adhesives or compression. Means that

As shown in FIG. 6A, the absorbent core 4 of the napkin 1 described above has a stacking recess 55 on the outer peripheral surface and rotates in one direction R, and the outer periphery of the stacking drum 54 It can be manufactured using a fiber stacking device provided with a duct (not shown) for supplying the core material in a scattered state on the surface.
A plurality of stacking recesses 55 are formed at regular intervals in the circumferential direction of the outer peripheral surface of the stacking drum 54. The bottom surface 56 of the accumulation recess 55 is made of a mesh plate or the like and has a large number of pores functioning as suction holes.

  Further, as shown in FIG. 6A, two concave portions 56 b and 56 c for forming the excretion portion middle high region 40 and the rear middle high region 49 are formed on a part of the bottom surface 56 of the accumulation concave portion 55. Yes. Further, at the bottom of the concave portion 56b, the depth is different between the portion where the central thick portion 41 is formed and the portion where the lateral thick portions 42, 42 are formed. The breathable member 57 for forming the grooves 44, 46, 47 in the side thick part 42 and the same difficulty for forming the groove 53 between the central thick part 41 and the side thick part 42. A breathable member is disposed. Further, a non-breathable member 58 for forming the groove portions 51 and 52 is formed on the bottom surface 56 of the accumulation recess 55 other than the recesses 56b and 56c. The non-breathable members 57 and 58 are fixed so as to protrude from the bottom surface of the accumulation recess 55, and may be non-breathable members, for example, made of metal, plastic, ceramic, or the like.

As shown in FIG. 6B, by supplying a core material such as pulp fiber into the duct while sucking from the bottom surface of the accumulation concave portion 55, as in a known fiber pile device including a fiber pile drum. In addition, the core material is deposited in a predetermined shape in the accumulation recess 55. The absorbent core 4 is obtained by releasing the deposit 400 from the accumulation recess 55. The absorbent core 4 is pressed and compressed appropriately by passing between a pair of rolls before or after coating with the core wrap sheet. Thereby, the part which consists of core material deposited on the air-impermeable member in the recessed part 56b becomes the groove parts 44, 46, 47, 53 with relatively small basic weight and density, and the air-impermeable member in each recessed part 56b is used. The portions accumulated on the bottom surface that do not have become small absorbing portions 45 and 48 having a relatively large basis weight and density. Similarly, in the portions other than the concave portions 56b and 56c, the portions made of the core material deposited on the air-permeable member 58 become the groove portions 51 and 52 having a relatively small basis weight and density, and the air-permeable member 58 is formed. The portion deposited on the bottom surface that does not have becomes a small absorbing portion (a portion other than the groove portions 51 and 52) having a relatively large basis weight and density. When manufacturing the absorptive core containing a water absorbing polymer, it is preferable to provide the introduction part of a water absorbing polymer in the middle of a duct.

As the surface sheet 2a, the three-dimensional guard forming sheet 2b, and the non-skin side sheet 3, those similar to those conventionally used in the technical field can be used without particular limitation. For example, as the top sheet 2a, a liquid-permeable nonwoven fabric or a perforated film can be used. As the non-skin side sheet 3, a water-repellent nonwoven fabric having a high water pressure resistance such as a liquid-impermeable film made of a synthetic resin or a spunbond-meltblown-spunbond laminated nonwoven fabric can be used. Further, as the three-dimensional guard forming sheet 2b, a water-repellent nonwoven fabric having a high water pressure resistance, such as a spunbond-meltblown-spunbond laminated nonwoven fabric, or the like can be used.

As mentioned above, although this invention was demonstrated based on the preferable embodiment, this invention is not restrict | limited to the said embodiment.
For example, in the napkin 1 of the above-described embodiment, the plan view shape of the central thick portion 41 may be a rectangular shape or an elliptical shape instead of an oval shape, but the lines forming the front and rear edges are respectively It is preferable that the shape is an ellipse or an ellipse that is a convex curve toward the outside in the longitudinal direction. The elliptical or elliptical central thick part 41 may have different radii of curvature at the front end 41a and the rear end 41b in the longitudinal direction (see FIG. 7B). Moreover, as shown in FIG.7 (d), the absorptive core 4 may not have the groove part 53 between the center thick part 41 and the side thick part 42, for example. In that case, the portion where the basis weight or thickness of the core material changes can be the boundary between the central thick portion 41 and the side thick portion 42. In the present invention, the central thick part 41 and the side thick part 42 may have the same basis weight of the core material, the same thickness, or the basis weight and thickness of the core material. Both may be the same.

  Further, the central thick part 41 and the side thick part 42 of the napkin 1 described above are both groove parts 44, 47 extending in the width direction of the absorbent core and a plurality of small absorbent parts 45, 48, but one or both of the central thick part 41 and the side thick part 42 may not have such a groove. Further, the central thick portion 41 may have the same thickness and basis weight over the entire region, and the small absorbing portion 45 may not be formed at all. Further, the rear middle-high region 49 may not exist.

  Moreover, as shown in FIG.7 (e), you may provide a pair or more side thick part 42 in the both sides of the center thick part 41. FIG. Moreover, a pair of side thick part 42 may be formed in any one end part of the longitudinal direction X of the central thick part 41, for example, the front end part of the central thick part 41 [FIG.7 (f). reference〕.

  Moreover, an absorptive core may consist only of fiber materials, such as a pulp fiber, and may contain both a fiber material and a super absorbent polymer. As the fiber material, various materials conventionally used for absorbent articles of absorbent articles such as sanitary napkins, panty liners, and disposable diapers can be used without particular limitation. For example, pulp fibers, rayon fibers, cotton Short fibers of cellulosic fibers such as fibers, short fibers of synthetic fibers such as polyethylene, and the like are used. These fibers can be used alone or in combination of two or more. Moreover, it is preferable that the fiber material is entirely or partly pulp fiber, and the ratio of the pulp fiber in the fiber material is preferably 50 to 100% by mass, more preferably 80 to 100% by mass, More preferably, it is 100 mass%. In addition to the superabsorbent polymer, the absorbent core may contain a deodorant or an antibacterial agent as necessary.

  Moreover, the excretion part middle-high area | region may be formed by laminating | stacking the small absorbent structure manufactured separately on a part of large absorbent structure with uniform thickness.

  In addition to the sanitary napkin, the absorbent article of the present invention may be other absorbent articles such as panty liners (origami sheets), incontinence pads, and disposable diapers. The description omitted in one embodiment described above and the requirements of only one embodiment can be applied to other embodiments as appropriate, and the requirements in each embodiment can be appropriately changed between the embodiments. Can be replaced with

This invention discloses the following absorbent articles further regarding embodiment mentioned above.
<1> A skin-side sheet, a non-skin-side sheet, and an excretion part that is disposed between these two sheets and that is disposed opposite to the wearer's liquid excretion part, including an absorbent core that is long in the front-rear direction of the absorbent article. An absorbent article having a rear part arranged behind the opposing part and the excretory part opposing part,
The absorbent core has a standard absorption region and a central portion in the width direction of the excretion portion-facing portion, and has an excretion portion middle-high region thicker than the standard absorption region,
The excretion part middle-high region has a central thick part that is long in the longitudinal direction of the absorbent core, and a lateral thick part that bulges outward from both side edges along the longitudinal direction of the central thick part. , Absorbent articles.
<2> The absorbent article according to <1>, wherein the central thick part has a shape in which the length in the width direction of the absorbent core gradually decreases toward the outside in the longitudinal direction of the absorbent core. .
<3> The absorbent article according to <2>, wherein the shape of the central thick part is an oval or an ellipse.
<4> The skin-side sheet and the absorbent core have a pair of longitudinal grooves extending in the longitudinal direction of the absorbent core as a linear groove in which the absorbent core is squeezed and integrated. The absorbent article according to any one of <1> to <3>, wherein the thick-walled portion is formed so as to be longitudinally cut in the longitudinal direction.
<5> The absorbent article has a pair of wing parts, the excretion part facing part is a region having a pair of wing parts in the front-rear direction, and the side thick part is the excretion part. The absorbent article according to any one of the above items <1> to <4>, which exists in the opposite direction.
<6> The <1> to <5>, wherein the side thick portion has a shape in which the length in the longitudinal direction of the absorbent core decreases toward the outside in the width direction of the absorbent core. The absorbent article as described in any one of these.
<7> The absorbent article according to <6>, wherein the side thick part has a trapezoidal shape.
<8> The <1> to <7>, wherein a central position of the side thick part in the longitudinal direction of the absorbent core is located in front of a central position of the central thick part in the longitudinal direction. The absorbent article as described in any one of these.
<9> The absorptivity according to <8>, wherein the distance between the central positions in the longitudinal direction of the central thick part and the lateral thick part is not less than 3% and not more than 40% of the total length of the central thick part. Goods.
<10> The basis weight of the side thick part is smaller than the basis weight of the central thick part, and larger than the basis weight of the standard absorption region, according to any one of <1> to <9>. Absorbent articles.

<11> A groove portion having a low basis weight is formed between the central thick portion and the lateral thick portion. The low basic weight is lower than the basic thick portion of the central thick portion and the lateral thick portion. The absorbent article as described in any one of <1> to <10>.
<12> The absorptivity according to any one of <1> to <11>, wherein the thickness of the side thick part is smaller than the thickness of the central thick part and larger than the thickness of the standard absorption region. Goods.
<13> The absorbent article according to any one of <1> to <12>, wherein the excretion portion middle-high region has an inclination in which the thickness decreases from a center portion in the width direction toward both side portions. .
<14> The absorbent article according to any one of <1> to <13>, wherein a thickness of the central thick portion is 150% to 500% of a thickness of the standard absorption region.
<15> The absorbent article according to any one of <1> to <14>, wherein a thickness of the side thick portion is 120% to 200% of a thickness of the standard absorption region.
<16> The absorbent article according to any one of <1> to <15>, wherein a thickness of the central thick part is 120% or more and 300% or less of a thickness of the lateral thick part.
<17> Any one of <1> to <16>, wherein a ratio (the former / the latter) of the maximum thickness portion of the central thickness portion and the minimum thickness of the side thickness portions is 1.3 or more and 4 or less. The absorbent article as described in one.
<18> The absorbent article according to any one of <1> to <17>, wherein a total length in a longitudinal direction of the side thick part is 10% to 80% of a total length of the central thick part. .
<19> The absorbent article according to any one of <5> to <18>, wherein a front end portion in the width direction of the wing portion and a front end portion in the width direction of the side thick portion are aligned in the longitudinal direction. .
<20> The absorptivity according to <19>, wherein the wing portion is symmetrical in the longitudinal direction, and a distal end portion of a widthwise edge portion of the side thick portion is located at a longitudinal center position of the wing portion. Goods.
<21> The <4> to <20, wherein the low basis weight groove is arranged on the outer side in the width direction of the longitudinal groove that squeezes and integrates the top sheet and the absorbent body provided on the side thick part. > The absorbent article as described in any one of>.
<22> The absorbent article according to <21>, wherein the groove having a low basis weight outside the longitudinal groove is provided in the standard absorbent portion.
<23> In any one of the above items <1> to <22>, on each side in the width direction of the excretory part-facing part, a three-dimensional guard that stands on the skin side of the wearer is disposed along the longitudinal direction. The absorbent article as described.
<24> The absorbent article according to <23>, wherein the three-dimensional guard has a non-standing region that does not stand at the rear part, and is configured to stand up in a region where the excretion portion is in a middle / high region.
<25> The absorbent article according to any one of <1> to <24>, wherein the absorbent article is a sanitary napkin having a total length of 30 cm or more.

1 Sanitary napkin (absorbent article)
2 Skin side sheet 2a Surface sheet 2b Solid guard forming sheet 3 Non-skin side sheet 4 Absorbent core 40 Middle part of excretion part 41 Central thick part 44, 46 Groove part 45 Small absorbent part 42 Side thick part 47 Groove part 48 Small Absorption part 43 Standard absorption area 49 Rear middle-high area 50 Intermediate area 53 Groove part between the central thick part and the lateral thick part 59 Continuous layer 6 Absorbent body 60 Linear groove 61 Vertical groove 64 Intermediate lateral groove 7 Wing part 8 rear flaps 10 stereoscopic guard 11 forward ridges 12 behind the raised portion A front portion B discharge泄部facing portion C rear portion

Claims (8)

A skin-side sheet, a non-skin-side sheet, and an excretory part-facing portion that is disposed between these sheets and that has an absorbent core that is long in the front-rear direction of the absorbent article, and is disposed to face the liquid excretion part of the wearer. An absorbent article having a rear part arranged behind the excretory part facing part,
The absorbent core has a standard absorption region, a middle portion of the excretion portion that is thicker than the standard absorption region, and is disposed in a central portion in the width direction in the excretion portion facing portion and the rear portion ,
The excretion portion middle-high region has a central thick portion that is long in the longitudinal direction of the absorbent core and a lateral thick portion that bulges outward from both side edges along the longitudinal direction of the central thick portion. and it is,
The central thick part extends from the excretory part facing part to the rear part,
The lateral thick part has a central position in the longitudinal direction of the absorbent core located at the excretory part facing part, a front end is located behind the front end of the central thick part, and a rear end is the central thick part. An absorbent article located in front of the rear end of the section . A skin-side sheet, a non-skin-side sheet, and an excretory part-facing portion that is disposed between these sheets and that has an absorbent core that is long in the front-rear direction of the absorbent article, and is disposed to face the liquid excretion part of the wearer. An absorbent article having a rear part arranged behind the excretory part facing part,
The absorbent core has a standard absorption region and a central portion in the width direction of the excretion portion-facing portion, and has an excretion portion middle-high region thicker than the standard absorption region,
The excretion portion middle-high region has a central thick portion that is long in the longitudinal direction of the absorbent core and a lateral thick portion that bulges outward from both side edges along the longitudinal direction of the central thick portion. And
As a linear groove in which the skin-side sheet and the absorbent core are squeezed and integrated, the skin-side sheet has a pair of vertical grooves extending in the longitudinal direction of the absorbent core, and the vertical grooves have the side wall thickness. the parts are formed so as to traverse in the longitudinal direction, the absorbent article.   The absorbent article has a pair of wing parts, the excretory part facing part is a region having the pair of wing parts in the front-rear direction of the absorbent article, and the side thick part is The absorbent article according to claim 1, wherein the absorbent article exists in the excretory part-facing part.   4. The method according to claim 1, wherein the lateral thick portion has a shape in which a length in a longitudinal direction of the absorbent core decreases toward an outer side in the width direction of the absorbent core. 5. The absorbent article as described.   The center position of the said side thick part in the longitudinal direction of the said absorptive core is located ahead of the center position of the said center thick part in this longitudinal direction in any one of Claims 1-4. The absorbent article as described.   The absorptive article according to any one of claims 1 to 5 whose basis weight of said side thick part is smaller than the basis weight of said central thickness part, and larger than the basis weight of said standard absorption field.   Between the central thick part and the side thick part, a groove part having a low basis weight is formed, which has a basis weight lower than the basis weight of any of the central thick part and the side thick part. The absorbent article according to any one of claims 1 to 6.   The absorptive article given in any 1 paragraph of Claims 1-7 whose thickness of said side thick part is smaller than the thickness of said central thick part, and larger than the thickness of said standard absorption field.

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