JP5978341B1 - Absorbent articles - Google Patents

Abstract

Provided is an absorbent article capable of fitting an absorbent body to an excretory opening such as a vaginal opening even when it is repeatedly attached and detached. A sanitary napkin 1 having a longitudinal direction, a width direction, and a thickness direction, and includes an absorbent body 3 that absorbs liquid, and the absorbent body 3 projects and bends toward the skin side in the thickness direction. Thus, the broken line 3L is guided from one end to the other end in the longitudinal direction. [Selection] Figure 4

Description

  The present invention relates to an absorbent article.

  Conventionally, sanitary napkins are known as absorbent articles. For example, Patent Document 1 discloses a liquid-impermeable back sheet, a liquid-permeable top sheet attached to the back sheet, and an absorber (absorbent core) positioned between the back sheet and the top sheet. What is provided is disclosed.

  The absorbent body of this absorbent article has a forming line in the vaginal opening region (crotch region) located at the center in the longitudinal direction and the width direction. The said forming line is comprised from the center vertical line extended in the longitudinal direction of an absorber, and a pair of line extended | stretched toward the width direction outer side from the both ends of a center vertical line, respectively. When the vaginal opening region is compressed in the width direction during use of the absorbent article, the absorbent body is deformed so as to be bent toward the user's skin side starting from the central vertical line.

JP-T 2002-538849

  In the absorbent article described in Patent Document 1, since the central vertical line is formed only in the vaginal opening region of the absorbent body, liquids such as menstrual blood can be removed from the vaginal opening of the absorbent body under repeated use. Since it is easy to collect in the region and the bent shape of the absorbent body starting from the central vertical line tends to collapse, there is a possibility that the shape is difficult to maintain and it is difficult to fit the user's vaginal opening.

  The present invention has been made in view of the above problems, and the object of the present invention is to fit an absorber to an excretory opening such as the vaginal opening even when it is repeatedly used for attachment and detachment. It is in providing the absorbent article which can be performed.

The main invention for achieving the above object is:
An absorbent article having a longitudinal direction, a width direction, and a thickness direction,
It has an absorber that absorbs liquid,
The absorbent body has a fold line extending from one end to the other end in the longitudinal direction to bend and project to the skin side in the thickness direction,
Comprising a crease along the fold line ;
The said broken line is an absorbent article characterized by not being a squeezed groove .
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, it is possible to fit the absorbent body to the excretory opening such as the vaginal opening even when it is repeatedly attached and detached.

It is the schematic plan view which looked at the sanitary napkin which concerns on embodiment of this invention from the skin side of the thickness direction. It is the schematic plan view which looked at the sanitary napkin from the non-skin side of the thickness direction. It is the III-III sectional view taken on the line of FIG. It is the schematic plan view which looked at the absorber from the non-skin side of the thickness direction. FIG. 5A and FIG. 5B are schematic views when the absorber is viewed from the longitudinal direction. FIG. 5A shows a state in which the absorber is bent, and FIG. 5B shows a state in which the bent absorber is spread. It is explanatory drawing for demonstrating the usage aspect of a sanitary napkin. It is a partial expansion schematic diagram when the absorber is viewed from the longitudinal direction. It is an expansion schematic diagram of a periphery of a folding induction region when the absorber is viewed from the non-skin side in the thickness direction. It is an expansion schematic diagram of a folding induction | guidance | derivation area | region periphery when the absorber which concerns on the modification of this invention is seen from the non-skin side of the thickness direction.

  At least the following matters will become apparent from the description of the present specification and the accompanying drawings.

  An absorbent article having a longitudinal direction, a width direction, and a thickness direction, comprising an absorbent body that absorbs liquid, and the absorbent body is bent so as to project and bend toward the skin side in the thickness direction The absorbent article which has from the one end of the said longitudinal direction to the other end becomes clear. Thereby, even if it is a case where attachment / detachment of this absorbent article is repeated, since the bending shape by the said broken line is maintained, the said absorber becomes easy to fit excretion openings, such as a vaginal opening.

  It is this absorbent article, Comprising: The said absorber has two or more point-like pressing parts compressed in the said thickness direction, and the said point-like pressing part is the said to-be-squeezed surface formed by being pressed. It is desirable that the distance between the centers of the surfaces to be compressed is longer than the widest width dimension of the surface to be compressed in the adjacent point-shaped compressed portions that are provided on one side in the thickness direction. Thereby, since a flow path necessary for the liquid to flow can be ensured between the point-like compressed parts, the liquid is easily diffused smoothly in the absorbent body, and the liquid is placed in the peripheral part of the broken line. Accumulation is suppressed, and the bent shape of the absorber can be stably maintained.

  In such an absorbent article, it is desirable that the distance between the centers of the surfaces to be compressed is 1 mm or more and 10 mm or less in the adjacent point-like compressed parts. Thereby, while being able to ensure the flow path for the liquid to flow between the said point-like pressing parts, the smooth spreading | diffusion of the liquid in the said absorber is attained.

  In this absorbent article, it is desirable that the dimension of the widest width of the pressed surface is 0.4 mm or more and 4.0 mm or less. Thereby, while being able to form the dotted | punctate pressing part, without penetrating the said absorber to the said thickness direction, the smooth spreading | diffusion of a liquid is attained in the said absorber.

  In this absorbent article, the absorbent body includes the fold line at the center in the width direction, and the width-direction dimension is not more than twice the dimension in the thickness direction of the absorbent body. From one end to the other in the longitudinal direction, and at least a part of which is disposed adjacent to the first point-like compressed part, and at least a part of which overlaps the folding induction region. It is desirable to have the 2nd point-like pressing part which has overlapped with the above-mentioned folding induction field. Thereby, since the flow path for the liquid to flow is formed in the folding induction region, it is possible to suppress the liquid from being accumulated in the contact portion with the excretion opening in the folding induction region. The bent shape can be stably maintained.

  In this absorbent article, it is preferable that the widest width of the opening in the thickness direction in the point-like compressed portion is narrower than the width of the folding guide region. Thereby, since the flow path for the liquid to flow can be ensured in the folding induction region, the liquid can easily flow in the longitudinal direction in the folding induction region.

  It is this absorptive article, Comprising: It is desirable for the said several point-like pressing part to be arrange | positioned at equal intervals, respectively in the said longitudinal direction and the said width direction. As a result, the liquid can smoothly flow in the longitudinal direction in the absorber, and the rigidity in the width direction of the absorber can be ensured.

  It is this absorptive article, Comprising: It is desirable for the distance between the said point-like pressing parts adjacent to the said longitudinal direction to be shorter than the distance between the said point-like pressing parts adjacent to the said width direction. As a result, the liquid flows more easily in the longitudinal direction than in the width direction in the absorbent body, and the liquid can be diffused in the absorbent body in a shorter time.

  In such an absorbent article, it is desirable that the dimension in the longitudinal direction of the point-like compressed portion is longer than the dimension in the width direction. Thereby, it becomes possible to shorten the distance between the said point-like pressing parts adjacent to the said longitudinal direction.

  In such an absorbent article, the absorbent body has an absorbent core containing a thermoplastic resin and a cover sheet containing a thermoplastic resin laminated in the thickness direction, and the plurality of point-like compressed parts are It is desirable that the absorbent core and the cover sheet are formed by pressing. Thereby, since the said absorptive core and the said cover sheet are joined more firmly, even when the said absorber absorbs a liquid and expand | swells in the said thickness direction, the deformation | transformation of the said thickness direction is suppressed. Thus, smooth diffusion of the liquid in the absorber is possible.

  This absorbent article has a top sheet that covers the absorbent body from the skin side in the thickness direction, and the top sheet is a non-woven fabric having a lower density than the absorbent body. The top sheet and the absorbent body And are preferably joined. This makes it easier for the liquid to flow from the top sheet to the absorber using capillary action, and the problem that the liquid flows on the surface of the top sheet and the liquid absorbed in the absorber The problem of backflow (liquid return) on the surface of the top sheet can be avoided.

  In such an absorbent article, the top sheet and the absorbent body are joined in the thickness direction by a plurality of dotted joint pressing parts, and the absorbent body has the broken line at the center in the width direction. A plurality of the point-like joint compressions, including a folding induction region including a width-direction dimension that is less than or equal to twice the dimension in the thickness direction of the absorbent body from one end to the other end in the longitudinal direction. It is desirable that the portion is disposed outside the folding guide region in the width direction. Thereby, since the said some dotted | punctate joint pressing part does not exist in the said folding induction | guidance | derivation area | region, it becomes easy to maintain the bending shape of the said absorber.

  In such an absorbent article, it is desirable that the dimension of the absorbent body in the thickness direction is 3 mm or less. Thereby, by making the thickness of the absorber thinner, it becomes easier to form a bent shape along the bent line, and it becomes easier to maintain the bent shape.

=== Embodiment ===
As an example of the absorbent article according to the embodiment of the present invention, a sanitary napkin 1 will be described. The absorbent article includes so-called cage sheets (for example, panty liners) and the like, and is not limited to sanitary napkins.

<Configuration of sanitary napkin 1>
The structure of the sanitary napkin 1 will be described with reference to FIGS.

  FIG. 1 is a schematic plan view of a sanitary napkin 1 according to an embodiment of the present invention as viewed from the skin side in the thickness direction. FIG. 2 is a schematic plan view of the sanitary napkin 1 viewed from the non-skin side in the thickness direction. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4 is a schematic plan view of the absorber 3 as seen from the non-skin side in the thickness direction. 5A and 5B are schematic views when the absorber 3 is viewed from the longitudinal direction. FIG. 5A shows a state in which the absorber 3 is bent, and FIG. 5B shows a state in which the bent absorber 3 is unfolded. Yes.

  As shown in FIGS. 1 and 2, the sanitary napkin 1 is a sheet-like member that is vertically long in plan view, and includes a longitudinal direction, a width direction, and a thickness direction. In the following description, “longitudinal direction” refers to the longitudinal direction of the sanitary napkin 1 product, “width direction” refers to the lateral direction orthogonal to the longitudinal direction, and “thickness direction” refers to The direction orthogonal to the longitudinal direction and the width direction is shown. Further, the thickness direction has a “skin side” that is in contact with the user's skin when the sanitary napkin 1 is used, and a “non-skin side” that is the opposite side.

  As shown in FIG. 3, the sanitary napkin 1 includes a top sheet 2, an absorbent body 3, and a back sheet 4, and the top sheet 2, the absorbent body 3, and the back sheet from the skin side in the thickness direction toward the non-skin side. The sheets 4 are laminated in this order. The top sheet 2 and the absorbent body 3 and the absorbent body 3 and the back sheet 4 are joined together by an adhesive 50 such as a hot melt adhesive. Examples of the application pattern of the adhesive 50 include an Ω pattern, a spiral pattern, and a stripe pattern.

  The top sheet 2 is a liquid-permeable member that allows liquid such as menstrual blood to permeate from the skin side in the thickness direction to the non-skin side, and comes into contact with the user's skin when the sanitary napkin 1 is used. As shown in FIG. 1, the top sheet 2 is formed larger than the absorbent body 3 in a plan view and covers the absorbent body 3 from the skin side in the thickness direction. In addition, in FIG. 1, the absorber 3 is shown with the broken line. The top sheet 2 has an outer edge portion 21 extending outward in the longitudinal direction and outward in the width direction from the absorbent body 3, and has a pair of projecting portions 22 projecting outward in the width direction at substantially the center in the longitudinal direction. doing.

  In the present embodiment, the top sheet 2 is a non-woven fabric having a density lower than that of the absorber 3, and for example, an air-through non-woven fabric is used. The top sheet 2 is not limited to an appropriate non-woven fabric such as an air-through non-woven fabric, but may be any flexible sheet member having liquid permeability. However, it is more desirable to use a non-woven fabric having a lower density than the absorbent body 3.

  This is because the capillary phenomenon can be used and the liquid easily penetrates from the top sheet 2 to the absorber 3. Here, “capillary phenomenon” means a phenomenon in which the liquid level rises from the outer free surface due to the inside of a thin tube placed in a liquid or a gap between solid walls, and this action is stronger as the gap is narrower. Become. Therefore, the liquid flows through the gaps of the fibers formed in the top sheet 2 and the gaps of the fibers formed in the absorbent body 3 and penetrates into each member. The narrower the gap, the faster the liquid penetration rate. Penetration from the top sheet 2 side to the absorber 3 side having a higher density (narrow gap) than the top sheet 2 is facilitated. Therefore, the problem that the liquid flows on the surface (skin side surface) of the top sheet 2 and the problem that the liquid absorbed inside the absorber 3 flows backward (liquid return) on the surface of the top sheet 2. Can be avoided.

  The absorber 3 is a member that absorbs liquid such as menstrual blood and holds it inside. As shown in FIG. 3, the absorbent body 3 includes an absorbent core 31, a skin side cover sheet 32, and a non-skin side cover sheet 33, and from the skin side (top sheet 2 side) in the thickness direction to the non-skin side ( The skin side cover sheet 32, the absorbent core 31, and the non-skin side cover sheet 33 are laminated in this order toward the back sheet 4 side.

  The absorbent core 31 includes cellulosic water-absorbing fibers that are liquid absorbent fibers and thermoplastic resin fibers, and these fibers are mixed with each other. As the liquid absorbent fiber, for example, pulp fiber or the like is used. In addition to the liquid absorbent fiber, a super absorbent polymer (so-called SAP) or the like may be used as an example of the liquid absorbent granular material. In addition, as the thermoplastic resin fiber, for example, a composite fiber having a so-called sheath-core structure in which a sheath is polyethylene (PE) and a core is polyethylene terephthalate (PET) is used.

  The skin side cover sheet 32 is a nonwoven fabric containing thermoplastic resin fibers, and for example, a member having excellent liquid permeability such as an air-through nonwoven fabric is used. The non-skin-side cover sheet 33 is a non-woven fabric containing thermoplastic resin fibers in the same manner as the skin-side cover sheet 32. For example, a member having excellent flexibility such as an SMS (spunbond / meltblown / spunbond) non-woven fabric is used.

  As shown in FIG. 3, the skin-side cover sheet 32 and the absorbent core 31 and the absorbent core 31 and the non-skin-side cover sheet 33 are joined in the thickness direction by an adhesive 500 such as a hot melt adhesive. Has been.

  In addition, the thermoplastic resin contained in each of the absorbent core 31, the skin side cover sheet 32, and the non-skin side cover sheet 33 does not necessarily have to be fibrous, and the shape is not particularly limited. In addition, the absorbent core 31, the skin side cover sheet 32, and the non-skin side cover sheet 33 do not necessarily need to contain a thermoplastic resin, but the absorbent core 31, the skin side cover sheet 32, and the non-skin side are not necessarily included. It is desirable that any one of the cover sheets 33 includes a thermoplastic resin.

  As shown in FIG. 5A, the absorbent body 3 has a broken line 3 </ b> L that is guided to protrude and bend toward the skin side in the thickness direction. Here, the broken line 3L is a line formed by folding in advance in the manufacturing stage, and does not include, for example, a line formed by embossing or a slit-like groove (hinge).

  As shown in FIGS. 1, 2, and 4, the broken line 3 </ b> L is formed at the center in the width direction of the absorber 3 from one end to the other end in the longitudinal direction. Thereby, even when the user repeatedly attaches and detaches the underwear with the sanitary napkin 1 fixed to the crotch part (crotch portion) of the underwear, the bent shape of the absorbent body 3 along the broken line 3L is maintained. Is done. This will be described in detail in <Usage of sanitary napkin 1> described later.

  The polygonal line 3L is not necessarily formed at the center position in the width direction of the absorber 3, and may be formed at a position slightly shifted in the width direction from the center position. However, since the sanitary napkin 1 is designed in a contrasting shape based on the center position in the width direction, the broken line 3L is desirably formed at the center position in the width direction. In FIG. 1, FIG. 2, FIG. 4, and FIGS. 5A and 5B, the broken line 3L is indicated by a one-dot chain line.

Moreover, the absorber 3 has the folding induction | guidance | derivation area | region 3a which includes the broken line 3L in the center of the width direction ranging from the one end of a longitudinal direction to the other end, as shown in FIG.1, FIG2 and FIG.4. As shown in FIG. 5B, the folding guide region 3a has a widthwise dimension (Wa ₁ + Wa ₂ ) in a state in which the absorber 3 bent along the fold line 3L is spread, and a dimension T in the thickness direction of the absorber 3. Less than twice.

In FIG. 5B, in the state in which the absorber 3 bent along the broken line 3L is expanded, the dimension (Wa ₁ + Wa ₂ ) in the width direction of the folding induction region 3a is _two times the dimension T in the thickness direction of the absorber 3. This shows a case where the number is doubled (Wa ₁ + Wa ₂ = T × 2, ie, Wa ₁ = Wa ₂ = T). In addition, the thickness T of the absorber 3 is 3 mm or less, and preferably 2 mm or less. By reducing the thickness of the absorber 3 in this manner, the absorber 3 can be easily folded along the broken line 3L, and the shape of the folding induction region 3a can be easily maintained. In FIG. 1, FIG. 2, FIG. 4, and FIGS. 5A and 5B, both ends in the width direction of the folding induction region 3a are indicated by two-dot chain lines.

  As shown in FIG. 4, the absorbent body 3 has a plurality of point-like compressed parts 30 that are compressed in the thickness direction. Here, the “spot shape” includes a region formed around an arbitrary point having no area, and has a predetermined shape and area. The liquid absorbed by the absorber 3 flows through the flow path (gap) formed between the plurality of point-like compressed parts 30 and is diffused into the absorber 3. Thereby, the collapse of the bent shape of the absorbent body 3 due to the accumulation of liquid in the periphery of the broken line 3L, that is, the folding guide region 3a is suppressed, and the bent shape can be easily maintained.

  More specifically, as shown in FIG. 3, the point-like compressed portion 30 is formed by pressing the skin side cover sheet 32, the absorbent core 31, and the non-skin side cover sheet 33 together in the thickness direction. ing. Thereby, joining of the skin side cover sheet 32, the absorptive core 31, and the non-skin side cover sheet 33 becomes strong, and even when the absorber 3 absorbs the liquid and expands in the thickness direction, the thickness is less likely to change. The liquid can be smoothly flowed inside the absorber 3. In FIG. 3, only two point-like compressed parts 30 among the plurality of point-like compressed parts 30 are shown by broken lines. In addition, the absorber 3 does not necessarily need to have the some dotted | punctate pressing part 30, and should just have the broken line 3L at least. The details of the point-like compressed unit 30 will be described later.

  As shown in FIG.1 and FIG.3, the top sheet 2 and the absorber 3 are joined and integrated in the thickness direction by the some dotted | punctate pressing part 23 and the some linear joining pressing part 24. As shown in FIG. More specifically, the plurality of dotted joint squeezing parts 23 and the plurality of linear joint squeezing parts 24 are formed by being squeezed from the skin side surface of the top sheet 2. Here, what is meant by “dot” in the point-like compressed portion 23 is synonymous with “point” in the point-like compressed portion 30. In addition, in FIG. 3, four dotted joining pressing parts 23 among several dotted joining pressing parts 23, and two linear joining pressing parts 24 among several linear joining pressing parts 24 are shown with a broken line. Yes.

  As shown in FIG. 1, the plurality of dotted joint pressing parts 23 are arranged on the outer side in the width direction of the folding induction region 3 a of the absorbent body 3. That is, the some dotted | punctate joint pressing part 23 is not formed in the folding induction | guidance | derivation area | region 3a. Temporarily, when the dotted | punctate junction pressing part 23 is formed in the folding induction | guidance | derivation area | region 3a, in the dotted | punctate junction pressing part 23, the density of the absorber 3 becomes partially high, and the rigidity of the absorber 3 is strong. Become. In that case, the bending deformation along the broken line 3L is likely to be hindered in the portion, or the bent shape along the broken line 3L is likely to be broken. Therefore, by not forming the dotted joint pressing part 23 in the folding induction region 3a, the absorber 3 can be easily folded along the fold line 3L, and the folded shape of the absorber 3 can be maintained.

  The plurality of linear joint pressing parts 24 are formed continuously along the outer peripheral edge of the absorbent body 3 and have an annular shape elongated in the longitudinal direction as a whole. The plurality of dotted joint squeezing parts 23 are discretely arranged in a substantially closed region partitioned by the plurality of linear joint squeezing parts 24.

  The back sheet 4 is a liquid-impermeable member, and for example, a resin film such as polyethylene (PE) is used. When the sanitary napkin 1 is used, the back sheet 4 prevents the liquid that has passed through the top sheet 2 and is absorbed by the absorbent body 3 from seeping out into clothes (non-skin side) such as underwear. As shown in FIG. 2, the back sheet 4 has an outer edge portion 41 extending outward in the longitudinal direction and outward in the width direction from the outer peripheral edge of the absorbent body 3, and a pair of overhangs projecting outward in the width direction. A portion 42 is provided at substantially the center in the longitudinal direction.

  The sanitary napkin 1 is formed between the top sheet 2 and the back sheet 4 by joining the outer edge part 41 of the back sheet 4 and the outer edge part 21 (see FIG. 1) of the top sheet 2 described above by adhesion or welding. In this structure, the absorber 3 is held. In addition, when the sanitary napkin 1 is placed and fixed on an undergarment or the like by joining the pair of overhang portions 42 of the backsheet 4 and the pair of overhang portions 22 (see FIG. 1) of the top sheet 2 described above. A wing portion as a fixed portion to be provided is configured.

  On the non-skin side surface of the back sheet 4, a pair of strip-like main body adhesive portions 51 extending in the longitudinal direction are provided on the outer side in the width direction of the folding induction region 3 a, and a pair of rectangular wing adhesive portions 52 are provided. It is provided in a portion corresponding to the pair of overhang portions 42. When the sanitary napkin 1 is used, the pair of main body adhesive portions 51 are attached to the inside of the crotch portion of the underwear, and the pair of wing portions (the pair of overhang portions 22 and 42) are bent to the non-skin side to form a pair of The wing adhesive part 52 is affixed to the outside of the crotch, and the sanitary napkin 1 is fixed to the underwear.

<About use mode of sanitary napkin 1>
Next, how the sanitary napkin 1 is used will be described with reference to FIG.

  FIG. 6 is an explanatory diagram for describing a usage mode of the sanitary napkin 1.

  When the user 6 wears the sanitary napkin 1, the underwear is pulled up to the crotch 60 side of the user 6 with the sanitary napkin 1 fixed to the crotch part of the underwear. At this time, as shown in state A, the sanitary napkin 1 is provided with a bent shape (folding fold) along the fold line 3L in advance in the absorbent body 3 of the sanitary napkin 1, so that the sanitary napkin 1 is on the skin side (in FIG. 6). It is pulled up in a bent state so as to protrude upward.

  In the state where the sanitary napkin 1 is attached to the crotch 60 of the user 6, as shown in the state B, the portion that protrudes toward the skin along the broken line 3L is a labia in which the excretory opening 60a such as the vaginal opening exists. To touch. Thereby, while making the user 6 feel favorable fitting property of the sanitary napkin 1, it becomes possible to make the absorber 3 absorb the excretory fluid such as menstrual blood without leaking outside.

  Here, if the polygonal line 3L is formed only in a part of the absorbent body 3 in the longitudinal direction (for example, a region in contact with the excretion opening 60a), absorption is performed by the restoring force of the region where the polygonal line 3L is not formed. It becomes easy to return to the state where the body 3 spreads, and it becomes difficult to maintain the bent shape of the absorbent body along the broken line 3L. On the other hand, when the broken line 3L is formed from one end to the other end in the longitudinal direction of the absorber 3 as in the present embodiment, the restoring force is difficult to work and the absorber 3 along the broken line 3L The bent shape can be stably maintained without breaking. Therefore, for example, even in an environment where the user 6 repeatedly uses the sanitary napkin 1 for a long time of 12 hours or longer, the absorber 3 can be fitted to the excretion opening 60a.

<About the structure of the point-like pressing part 30>
Next, the detailed structure of the dotted | punctate pressing part 30 is demonstrated with reference to FIG.7 and FIG.8.

  FIG. 7 is a partially enlarged schematic view of the absorber 3 as viewed from the longitudinal direction. FIG. 8 is an enlarged schematic view of the periphery of the folding induction region 3a when the absorber 3 is viewed from the non-skin side in the thickness direction.

  As shown in FIG. 7, the point-like compressed portion 30 is formed by being compressed from the non-skin side in the thickness direction of the absorbent body 3. As a method for forming the point-like compressed portion 30, for example, a method of forming the absorbent body 3 by placing the skin side surface on a flat table and pressing and pressing a pin having a circular cross section from the non-skin side surface toward the table. (So-called embossing). At this time, a dent 303 corresponding to each point-like compressed portion 30 is formed on the skin side of the absorbent body 3. In addition, when forming the dotted | punctate pressing part 30, it is not necessarily required to squeeze from the non-skin side of the absorber 3, and you may squeeze from the skin side.

  As described above, the absorbent core 31 contains a thermoplastic resin, and at least one of the skin-side cover sheet 32 and the non-skin-side cover sheet 33 also contains a thermoplastic resin. Thus, the thermoplastic resin of the absorbent core 31 and the thermoplastic resin of the cover sheets 32 and 33 are heat-sealed by heat generated by embossing when forming the point-like compressed portion 30, and the absorbent core 31 and the cover The sheets 32 and 33 are bonded more firmly. Thereby, even when the absorber 3 absorbs the liquid and expands in the thickness direction, the thickness hardly changes, and the liquid easily flows in the absorber 3.

  Moreover, the dotted | punctate pressing part 30 has the to-be-squeezed surface 301 on the opposite side (skin side) of the thickness direction with respect to the opening 302 while having the opening 302 in the non-skin side of the thickness direction. The pressed surface 301 is a surface formed by pressing the non-skin side surface of the absorbent body 3. In addition, when the absorbent body 3 is squeezed from the skin side in the thickness direction to form the point-like squeezed portion 30, the surface to be squeezed 301 is provided on the non-skin side in the thickness direction, and the skin side in the thickness direction Will have an opening 302.

  In this embodiment, since the point-like pressing part 30 is formed using a pin having a circular cross section, the pressed surface 301 and the opening 302 have a circular shape, but the cross section is not necessarily circular. It is not necessary to form the point-like compressed part 30 using a pin. For example, the point-like compressed part 30 may be formed using a pin whose cross section is a star shape, a rectangular shape, or an elliptical shape.

  As shown in FIGS. 7 and 8, the size of the compressed surface 301 is smaller than the size of the opening 302 in plan view. That is, the diameter Wd of the pressed surface 301 is smaller than the diameter Wm of the opening 302 (Wd <Wm). As shown in FIG. 7, the point-like compressed portion 30 is formed such that the outer diameter dimension gradually decreases from the non-skin side in the thickness direction toward the skin side. This is a phenomenon that occurs with the formation process of the point-like compressed portion 30, and the size of the pressed surface 301 does not necessarily have to be smaller than the opening 302.

  In addition, as for the diameter Wd of the to-be-compressed surface 301, it is desirable that they are 0.4 mm or more and 4.0 mm or less. This is because when the diameter Wd is smaller than 0.4 mm, there is a possibility of penetrating the absorbent body 3 in the thickness direction when the point-like compressed portion 30 is formed, and the diameter Wd is larger than 4.0 mm. In this case, the width of the flow path formed between the point-like compressed parts 30 is increased, and the high-density portion in the absorber 3 is reduced, so that it is difficult to quickly diffuse the liquid into the absorber 3. Therefore, when the diameter Wd is 0.4 mm or more and 4.0 mm or less, the point-like compressed portion 30 can be formed without penetrating the absorbent body 3 in the thickness direction, and the liquid in the absorbent body 3 can be formed. It is possible to flow smoothly.

  Here, in this embodiment, since the point-shaped pressing part 30 is formed using a pin having a circular cross section, in the compressed surface 301 and the opening 302, the width dimension in any direction in the plan view is the diameter. Are equal. However, for example, when the point-like compressed portion 30 is formed using a pin having a rectangular cross section, the compressed surface 301 and the opening 302 have a rectangular shape having a long side and a short side. It will be different. Thus, in the case of the compressed surface 301 and the opening 302 having shapes such that the width dimension in plan view varies depending on the direction, the following description will be given in consideration of the widest width dimension of the compressed surface 301 and the opening 302. To do.

  As shown in FIG. 7, in the adjacent point-shaped compressed parts 30, the distance Wc between the centers 301 c of the compressed surfaces 301 is longer than the diameter Wd as the widest width of the compressed surface 301. Thereby, since a flow path required for the liquid absorbed by the absorber 3 to flow can be secured, the liquid can smoothly flow in the absorber 3. Here, “the center 301c of the surface to be compressed 301” refers to a point equidistant from each vertex and each side in the shape of the surface to be compressed 301. In this embodiment, since the to-be-squeezed surface 301 has circular shape, the center of the said circle is shown.

  The distance Wc is more preferably 1 mm or more and 10 mm or less. When the distance Wc is shorter than 1 mm, the gap formed between the point-like compressed parts 30 may be crushed and it may not be possible to secure a flow path through which the liquid flows. When the distance Wc is longer than 10 mm, The high density portion in the absorber 3 is reduced, and it becomes difficult to quickly diffuse the liquid into the absorber 3. Therefore, when the distance Wc is 1 mm or more and 10 mm or less, it is possible to secure a flow path necessary for the liquid to flow, and to smoothly flow the liquid in the absorber 3. .

  As shown in FIG. 8, the absorbent body 3 is disposed adjacent to the first point-like compressed portion 30 a at least partially overlapping the folding induction region 3 a and the first point-like compressed portion 30 a, and at least partially folded. It has the 2nd point-like pressing part 30b which has overlapped with field 3a. In FIG. 8, the 1st point-like pressing part 30a which the whole overlaps with the folding induction | guidance | derivation area | region 3a, and four 2nd points which are arrange | positioned adjacent to the 1st point-like pressing part 30a and one part has overlapped with the folding induction | guidance | derivation area | region 3a. The shape pressing part 30b is shown as an example.

  In addition, although the absorber 3 does not necessarily need to have the point-like pressing part 30 applicable to the 1st point-like pressing part 30a and the 2nd point-like pressing part 30b, the 1st point-like pressing part 30a and the 2nd point-like pressing part. Since the flow path for the liquid absorbed by the absorber 3 to flow by having the pressing part 30b can be formed in the folding induction region 3a, the excretion opening 60a (see FIG. 6) in the folding induction region 3a The liquid does not accumulate in the contact portion of the liquid, and the liquid easily diffuses throughout the folding induction region 3a, and the collapse of the bent shape of the absorber 3 can be suppressed, and the bent shape can be stably maintained. .

Furthermore, it is desirable that the diameter Wm as the widest width of the opening 302 of the point-like compressed portion 30 is narrower than the dimension Wa (Wa ₁ + Wa ₂ in FIG. 5) in the width direction of the folding guide region 3a. As a result, a flow path for the liquid to flow can be secured in the folding induction region 3a, and the liquid can easily flow in the longitudinal direction as shown by arrows in FIG. It becomes possible to maintain more stably.

  In the present embodiment, the plurality of point-like compressed parts 30 are arranged at equal intervals in the longitudinal direction and the width direction, respectively, and have a staggered arrangement pattern (see FIG. 4). More specifically, as shown in FIG. 8, the distance Wi between the nearest point-like pressing parts 30 adjacent in the longitudinal direction and the distance Ws between the nearest point-like pressing parts 30 adjacent in the width direction are as follows. A plurality of dot-like pressing parts 30 are arranged so as to be equal. In addition, although the several point-like pressing part 30 does not necessarily need to be formed uniformly, while making it flow in the longitudinal direction in the absorber 3 smoothly by forming in this way, absorption is also carried out. It is also possible to ensure rigidity in the width direction of the body 3.

=== Modification ===
Next, a sanitary napkin according to a modification of the present invention will be described with reference to FIG.

  FIG. 9 is an enlarged schematic view of the periphery of the folding induction region 3a when the absorber 3A according to the modification of the present invention is viewed from the non-skin side in the thickness direction. In FIG. 9, about the component which is common in what was demonstrated about the absorber 3 which concerns on embodiment, the same code is attached and the description is abbreviate | omitted.

In the absorbent body 3A according to this modification, the point-like compressed part 300 is formed in an elliptical shape having a long diameter in the longitudinal direction. That is, the dimension Wm _{1 in} the longitudinal direction of the point-like compressed part 300 is formed longer than the dimension Wm _{2 in the} width direction. In addition, in this modification, although the dotted | punctate pressing part 300 is an elliptical shape which has a long diameter in a longitudinal direction, it is not restricted to this, For example, the rectangular shape which has a long side in a longitudinal direction may be sufficient, and a dotted | punctate pressing part The dimension Wm _{1 in} the longitudinal direction of 300 only needs to be longer than the dimension Wm _{2 in the} width direction.

In addition, the dimension Wm _{1 in} the longitudinal direction of the point-like compressed part 300 is not necessarily formed longer than the dimension Wm _{2 in the} width direction, and the distance Wj between the nearest point-like compressed parts 300 adjacent in the longitudinal direction. It is only necessary that the plurality of point-like compressed parts 300 be arranged so as to be shorter than the distance Wb between the nearest point-like compressed parts 300 adjacent in the width direction. As a result, the liquid can flow more easily in the longitudinal direction than in the width direction in the absorbent body 3, and the liquid can be diffused into the absorbent body 3 in a shorter time.

  However, the distance Wj between the point-like compressed parts 300 in the longitudinal direction without changing the distance between the centers of the adjacent point-like compressed parts 300 by making the point-like compressed parts 300 elliptical or rectangular as described above. Can be shortened.

=== Others ===
The above-described embodiments are for facilitating the understanding of the present invention, and are not intended to limit the present invention. The present invention can be changed and improved without departing from the gist thereof, and it is needless to say that the present invention includes equivalents thereof.

1. Sanitary napkin (absorbent article)
2 ... Top sheet 3 ... Absorber 3a ... Folding induction region 3L ... Folded line 23 ... Dot joint pressing part 30, 300 ... Dot pressing part 30a ... First point pressing part 30b ... Second point pressing part 31 ... Absorption Core 32 ... Skin-side cover sheet (cover sheet)
33 ... Non-skin side cover sheet (cover sheet)
301 ... Pressed surface 302 ... Opening

Claims (13)

An absorbent article having a longitudinal direction, a width direction, and a thickness direction,
It has an absorber that absorbs liquid,
The absorbent body has a fold line extending from one end to the other end in the longitudinal direction to bend and project to the skin side in the thickness direction,
Comprising a crease along the fold line ;
The absorbent article, wherein the broken line is not a compressed groove . The absorbent article according to claim 1,
The absorber has a plurality of point-like compressed parts compressed in the thickness direction,
The point-like squeezed part has a surface to be squeezed formed by being squeezed on one side in the thickness direction,
In the adjacent squeezed compressed parts, the distance between the centers of the pressed surfaces is longer than the widest width dimension of the pressed surfaces. The absorbent article according to claim 2,
In the adjacent squeezed compressed portions, the distance between the centers of the pressed surfaces is 1 mm or more and 10 mm or less. The absorbent article according to claim 2 or 3,
The widest width dimension of the said to-be-compressed surface is 0.4 mm or more and 4.0 mm or less, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 2 to 4,
The absorber is
The folding line includes the folding line at the center in the width direction and the width direction dimension is not more than twice the dimension in the thickness direction of the absorber from one end to the other end in the longitudinal direction. With
A first point squeezing portion at least partially overlapping the folding induction region; a second point squeezing portion disposed adjacent to the first point compression portion and at least partially overlapping the folding induction region; An absorbent article comprising: The absorbent article according to claim 5,
The absorbent article characterized in that the widest width of the opening in the thickness direction in the point-like compressed portion is narrower than the width of the folding induction region. It is an absorptive article given in any 1 paragraph of Claims 2-6,
The absorptive article in which a plurality of above-mentioned point-like pressing parts are arranged at equal intervals, respectively in the longitudinal direction and the width direction. It is an absorptive article given in any 1 paragraph of Claims 2-6,
The absorbent article characterized in that a distance between the point-like compressed parts adjacent in the longitudinal direction is shorter than a distance between the point-like compressed parts adjacent in the width direction. The absorbent article according to claim 8, wherein
The absorbent article according to claim 1, wherein a dimension in the longitudinal direction of the point-like compressed portion is longer than a dimension in the width direction. It is an absorptive article given in any 1 paragraph of Claims 2-9,
The absorbent body has an absorbent core containing a thermoplastic resin and a cover sheet containing a thermoplastic resin laminated in the thickness direction,
The plurality of point-like pressing parts are formed by pressing the absorbent core and the cover sheet. It is an absorptive article given in any 1 paragraph of Claims 1-10,
A top sheet covering the absorbent body from the skin side in the thickness direction;
The top sheet is a non-woven fabric having a lower density than the absorber,
An absorbent article, wherein the top sheet and the absorber are joined. The absorbent article according to claim 11,
The top sheet and the absorbent body are joined in the thickness direction by a plurality of dotted joining squeezing parts,
The absorber includes a folding induction region that includes the fold line at the center in the width direction and has a width direction dimension that is not more than twice the dimension in the thickness direction of the absorber from one end in the longitudinal direction. Has across the edge,
The absorptive article, wherein a plurality of dotted joint pressing parts are arranged in the width direction outside of the folding induction field. The absorbent article according to any one of claims 1 to 12,
The absorbent article is characterized in that a dimension of the absorbent body in the thickness direction is 3 mm or less.

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