JP2017196339A - Absorbent article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an absorbent article which can give expectation that the absorbent article is especially excellent in elasticity and is high-quality to a wearer without expanding the absorbent article before wearing and can exert excellent wearing feeling and high absorption performance in wearing.SOLUTION: An absorbent article according to the invention includes an elastic sheet which is positioned on a non skin-facing surface side of an absorber and shows elasticity at least in a longitudinal direction in a rear side region. A surface sheet has light transmittance of 45% or more at least in the rear side region. Further, the absorber includes a slit part existing region in which a plurality of slit parts extending in a width direction exist in the rear side region in which the absorber and the elastic sheet are overlapped in a width direction and a slit part non-existing region in which the slit parts do not exist in an excretion port corresponding region. The slit part existing region has a wide slit part that is wider than the other slit parts in a first existing region that is on a proximate side to the excretion port corresponding region.SELECTED DRAWING: Figure 1

Description

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

  Absorbent articles such as sanitary napkins, panty liners, and incontinence pads are worn while in contact with the wearer's crotch, so that the wearer does not feel uncomfortable, uncomfortable, liquid leakage, etc. Absorbent articles that are easily deformed following the wearer's body shape (that is, excellent in fit) have been studied.

  As such an absorbent article, for example, Patent Literature 1 discloses an absorbent article including a vertically long absorbent body interposed between a top sheet and a back sheet, and the absorbent body includes at least an upper layer and a lower layer. Each of the upper layer and the lower layer has a plurality of cuts in portions located on both sides in the longitudinal direction of the absorber, and the cuts in the upper layer and the cuts in the lower layer The said absorbent article formed in the position which does not overlap in the said longitudinal direction is disclosed. According to the absorbent article disclosed in Patent Document 1, due to the stretchability obtained by opening and closing the cuts in the above-described absorbent body, it exhibits a curved shape that conforms to the wearer's crotch, and fits while wearing It is said that a good three-dimensional shape can be formed and liquid leakage can be suppressed.

Japanese Patent No. 5411344

  Since the absorbent article disclosed in Patent Document 1 is formed in the absorbent body surrounded by the top sheet and the back sheet, the slit that expresses elasticity is formed by the wearer of the absorbent article before wearing. In addition, it is difficult to recognize that the absorbent article is a product having excellent stretchability, and sometimes the wearer stretches the absorbent article in the longitudinal direction before wearing the absorbent article to increase its stretchability. There was a case to confirm. However, since the cut formed in the above-mentioned absorbent body does not return to the original closed state once opened by extension, if such an absorbent article is extended before wearing, In this case, the expected stretchability is not exhibited, and it is difficult to obtain a good wearing feeling, or there is a possibility that the absorption performance may be lowered due to the cut in the open state.

  Therefore, the present invention is expected to be a high-quality absorbent article that is particularly excellent in stretchability (that is, excellent in wearing feeling) without having to stretch the absorbent article before wearing the absorbent article. It is an object of the present invention to provide an absorbent article that can give a feeling of wear to the wearer and can exhibit an excellent wearing feeling and high absorption performance when the absorbent article is worn.

  The absorbent article which concerns on 1 aspect (aspect 1) of this invention was equipped with the surface sheet which forms the skin opposing surface of an absorbent article, and the absorber located in the non-skin opposing surface side of this surface sheet, The longitudinal direction An absorbent article having a direction, a width direction, and a thickness direction, wherein the absorbent article is a front region located on a wearer's front side when the absorbent article is worn in the longitudinal direction in a plan view. And a rear side region located on the wearer's rear side when the absorbent article is worn, an excretion port corresponding region located between these regions and corresponding to the wearer's excretion port when the absorbent article is worn, The absorbent article is provided with a stretchable sheet that is located on the non-skin facing surface side of the absorbent body and has stretchability in at least the longitudinal direction in the rear region, and the topsheet is At least in the rear region, the light transmittance is 5% or more, and in the planar view, the absorber has a slit portion existence region in which a plurality of slit portions extending in the width direction are present in the rear side region overlapping with the stretchable sheet in the thickness direction. And having a slit part non-existing area in which the slit part does not exist in the excretory opening corresponding area, and the slit part existing area equally divides the slit part existing area into three in the longitudinal direction. A first existence area that is most proximal to the mouth corresponding area, a second existence area that is most distal to the excretory opening corresponding area, and a central existence area located between these two areas. And the first existence region includes a wide slit portion that is wider in the longitudinal direction than the slit portion in the central existence region.

The absorbent article of the first aspect has a light transmittance of 45% or more in at least the rear side area of the top sheet, and the first existence area (that is, wearing of the absorbent article) in the slit part existence area of the absorber. The region adjacent to the excretion port corresponding region that the user tends to pay attention to before wearing) includes the wide slit portion, so that the wearer approaches the excretion port corresponding region before wearing the absorbent article. A wide slit portion in one existing region (more specifically, an opening portion of the wide slit portion or a stretchable sheet disposed on the non-skin facing surface side of the absorbent body through the opening portion), and its peripheral portion Due to the color difference (difference in lightness, color, etc.), it is easy to recognize through the surface sheet. Thereby, even if the absorbent article of this embodiment does not extend, the absorbent article of this embodiment has a plurality of slit portions, so that it is particularly excellent in stretchability (that is, excellent in wearing feeling). The expectation that it is an absorbent article can be nurtured by the wearer before wearing.
Moreover, the absorbent article of this aspect comprises a stretchable sheet having stretchability in at least the longitudinal direction and a slit portion existing region in the absorbent body in a rear side region that is a region corresponding to the wearer's buttocks when worn. (I.e., the rear region of the absorbent article is configured to be easily deformed in a curved direction along the longitudinal direction and to be deformed in a direction twisted around the longitudinal direction) Even when a force is applied in a direction in which the absorbent article is twisted in the rear side region by alternately moving the wearer's buttocks when the operation is performed, the slit portion existence region and the elastic sheet are not worn by the wearer. By deforming in the above-described twisting direction in accordance with the movement, it is possible to maintain a state in which the rear region is in close contact with the skin surface of the wearer (that is, to obtain an excellent wearing feeling). And the force in the twisting direction is buffered by the deformation of the rear side region and is not easily transmitted to the excretory port corresponding region, and the excretion port corresponding region (particularly, the slit portion where there is no slit portion) In the non-existing region), the shape of the absorbent body can be easily maintained, and the liquid excreta discharged from the wearer can be stably absorbed over a long period of time.
Furthermore, since the absorbent article according to this aspect includes the above-described stretchable sheet in the rear side region, the effect achieved by the above-described slit portion existing region while ensuring the stretchability in the rear side region. Can be exhibited more reliably. In addition, even if the wearer stretches the absorbent article in the longitudinal direction before wearing the absorbent article and confirms its stretchability, the stretchable sheet allows the original slit state to be restored from the opened state. Since it is easy to return to the closed state, it is possible to more reliably obtain an excellent wearing feeling and high absorption performance when the absorbent article is worn.
As a result of the above, the absorbent article of this aspect is particularly excellent in stretchability because the absorbent article has a plurality of slit parts by visually recognizing the above wide slit part before wearing (that is, wearing). The wearer can be expected to be a high-quality absorbent article (excellent in feeling) and exhibit excellent wearing feeling and high absorption performance not only in the expectation but also in actual wearing. can do.

  Moreover, in another aspect (aspect 2) of the present invention, in the absorbent article according to aspect 1, the absorbent body has a rear slit portion in which no slit portion is present in a region on the rear side of the slit portion existing region. It has a non-existing region, and the second existing region includes a wide slit portion that is wider in the longitudinal direction than the slit portion in the central existing region.

In the absorbent article according to the second aspect, the absorbent includes a wide slit portion in each of the first existence region and the second existence region in the slit portion existence region (that is, at least sandwiching the central existence region). In order for the wearer to include a wide slit portion, the region between the wide slit portion in the first existence region and the wide slit portion in the second existence region is an area where the plurality of slit portions are present. It can be easily recognized as (ie, stretchable region), and a higher expectation for the quality of the absorbent article (particularly the feeling of wearing) can be nurtured by the wearer.
Moreover, since the absorbent article of this aspect has the back side slit part nonexistence area | region where a slit part does not exist in the area | region of the back side rather than the said slit part presence area | region in an absorber, back of an absorbent article A certain level of strength of the absorber can be secured in the side region. Thus, in the rear region where the force is easily applied by the wearer's operation, the absorber is less likely to lose shape or break, and the absorber has excellent extensibility and flexibility. The function (absorption performance) as can be exhibited more satisfactorily and stably.

  Furthermore, in another aspect (aspect 3) of the present invention, in the absorbent article according to aspect 2, the rear-side slit part non-existing region is a region including an edge on the rear side of the absorbent body.

  In the absorbent article according to the third aspect, since the rear slit portion non-existing area having a relatively high strength is an area including the edge on the rear side of the absorbent body, the wearer is wearing the absorbent article. It is easy to adjust the position of the absorbent article in a state where the rear slit portion non-existing region is gripped and fixed to clothes such as underwear. Thereby, since a wearer can adjust the position of an absorptive article to a more suitable position at any time, he can obtain a much more excellent feeling of wear and a sense of security.

  Furthermore, in another aspect (Aspect 4) of the present invention, in the absorbent article according to Aspect 2 or 3, the rear-side slit part non-existing region includes an embossed part.

  Since the absorbent article of this aspect 4 includes an embossed part that is easily noticed by the wearer in the rear slit part non-existing region, the wearer includes the above-described embossed part before wearing the absorbent article. The wide slit portion in the second existence region adjacent to the slit portion non-existing region can be more easily recognized through the surface sheet, and the effects obtained by the absorbent article of the above-described aspect 2 can be more effectively exhibited. it can. Furthermore, since the absorbent article according to this aspect includes the embossed part, the rigidity of the rear slit part non-existing region is high, so that the wearer holds the rear slit part non-existing region and wears underwear, etc. It is easier to adjust the position of the absorbent article in a state of being fixed to the clothes, and the effects obtained by the absorbent article of the above-described aspect 3 can be more effectively exhibited.

  Furthermore, in another aspect (aspect 5) of the present invention, in the absorbent article according to any one of aspects 1 to 4, the stretchable sheet is constituted by a colored sheet having a color different from that of the absorber.

  In the absorbent article according to this aspect 5, the stretchable sheet disposed on the non-skin facing surface side of the absorbent body is constituted by a colored sheet colored in a color different from that of the absorbent body. Is more easily recognized by the color difference between the colored sheet (elastic sheet) and the absorbent body, which is visually recognized through the opening of the wide slit, and the expectation for the quality of the absorbent article (especially wearing feeling) It is possible to nurture the wearer more reliably.

  Furthermore, in another aspect (Aspect 6) of the present invention, in the absorbent article according to any one of Aspects 1 to 5, the stretchable sheet is a back sheet.

Since the absorbent article of this aspect 6 is a back sheet in which the above-described stretchable sheet is easily visible to the wearer, the stretchability of the absorbent article is easily recognized from the backsheet, and the absorbent article is stretchable. In particular, the wearer can be surely and more effectively cultivated a sense of expectation that it is a particularly excellent high-quality absorbent article.
Furthermore, if the above-described stretchable sheet is a back sheet, there is no need to separately provide a stretchable sheet between the absorber and the back sheet, so that the degree of freedom in product design is improved. Thereby, since an absorbent article can be thinned, it is possible to further improve a feeling of wear.

  Furthermore, in another aspect (aspect 7) of the present invention, in the absorbent article according to any one of aspects 1 to 6, the absorbent article has at least one fold line extending in the width direction in plan view. The broken line overlaps the wide slit portion in the first existence region in the thickness direction.

  When the absorbent article of this aspect 7 is folded in the longitudinal direction along the fold line and individually wrapped, the above wide slit portion is in a state in which tension is applied in the longitudinal direction by folding, and the wide slit portion is in a wide state. It can be held more reliably. Thereby, since the absorbent article of this aspect is maintaining the wide state of the above-mentioned wide slit part, even if it expand | deploys the said absorbent article from the individual packaging body (individually packaged state), the above-mentioned wide width | variety is maintained. The effect produced by the slit portion can be more reliably exhibited.

  Furthermore, in another aspect (aspect 8) of the present invention, in the absorbent article according to aspect 7, the fold line is a mountain fold line in which the skin facing surface side of the absorbent article is convex.

  In the absorbent article of the present aspect 8, when the absorbent article is folded in the fold line, the opening on the skin facing surface side of the wide slit portion is tensioned in the longitudinal direction by the aforementioned mountain fold. Therefore, the state (wide state) of the opening on the skin facing surface side that is easily visible to the wearer in the wide slit portion can be more reliably maintained. Thereby, the effect produced by the above-mentioned wide slit part can be more reliably and effectively exhibited.

  According to the absorbent article of the present invention, it is expected that the absorbent article is a high-quality absorbent article that is particularly excellent in stretchability (that is, excellent in wearing feeling) without having to stretch the absorbent article before wearing. Can be nurtured by the wearer. Furthermore, at the time of wearing, it can exhibit excellent wear feeling and high absorption performance.

FIG. 1 is a plan view of a sanitary napkin 1 according to an embodiment of the present invention as viewed in the thickness direction from the top sheet side. FIG. 2 is a plan view of the sanitary napkin 1 according to an embodiment of the present invention as viewed in the thickness direction from the back sheet side. FIG. 3 is an end view of a longitudinal section taken along line III-III of FIG. 1 in the sanitary napkin 1 according to the embodiment of the present invention. FIG. 4 is a perspective view schematically showing a state in which the sanitary napkin 1 according to the embodiment of the present invention is twisted in a direction twisted about the longitudinal direction. FIG. 5 is a plan view of the absorbent body 22 used in the sanitary napkin 1 according to one embodiment of the present invention in an unstretched state (natural state). FIG. 6 is a plan view showing an elongated state of the absorbent body 22 used in the sanitary napkin 1 according to the embodiment of the present invention.

  Hereinafter, preferred embodiments of the absorbent article of the present invention will be described in detail with reference to the drawings. In this specification, unless otherwise specified, “objects placed on a horizontal surface in an unfolded state (for example, absorbent articles, absorbent main bodies, absorbent bodies, etc.) are targeted from the upper side in the vertical direction. “Viewing in the thickness direction of an object” is called “plan view”. In particular, when the object is an absorbent article, viewing the absorbent article in the thickness direction from the top sheet side in a state where the absorbent article is unfolded may be simply referred to as “plan view”.

Various directions and the like used in this specification are as follows unless otherwise specified.
In this specification, “longitudinal direction” refers to “a direction in which the length of a vertically long object in plan view is long”, and “width direction” refers to “a direction in which the length of a vertically long object in plan view is short ( "Thickness direction" refers to "perpendicular to the object placed on the horizontal surface in the unfolded state", and these longitudinal direction, width direction and thickness direction are respectively They are orthogonal to each other.
Further, in this specification, “in the longitudinal direction of the absorbent article, when the wearer wears the absorbent article, one side that is relatively proximal to the wearer's abdomen” The front side of the article is referred to as “in the longitudinal direction of the absorbent article, when the wearer wears the absorbent article, it is relatively distal to the wearer's abdomen (ie, relative to the wearer's back). The other side that is relatively proximal) is referred to as “the rear side of the absorbent article”.
Further, in this specification, "vertically elongated object (e.g., an absorbent article, the absorbent main body, the absorbent body, etc.) in the width direction of the relatively proximal with respect to the width direction central axis C _L extending in the longitudinal direction side "referred to as" inner side in the width direction ", in" a width direction of the vertically elongated object, the outer side relatively distal "and in the" width direction with respect to the widthwise central axis C _L "
In this specification, unless otherwise specified, in the thickness direction of the absorbent article, “relatively proximal to the wearer's skin surface when the absorbent article is worn” is defined as “skin facing surface”. "Side", and "the distal side relative to the skin surface of the wearer when the absorbent article is worn" is referred to as "the non-skin facing surface side".

FIG. 1 is a plan view of the sanitary napkin 1 according to an embodiment of the present invention in a state where the sanitary napkin 1 is expanded, as viewed in the thickness direction T from the surface sheet side, and FIG. It is the top view seen in thickness direction T from the back sheet side. 1 and 2, the upper side of the drawing corresponds to the front side of the absorbent article, and the lower side of the drawing corresponds to the rear side of the absorbent article.
FIG. 3 is an end view of the sanitary napkin 1 taken along the line III-III in FIG.

  As shown in FIGS. 1 and 2, the sanitary napkin 1 according to this embodiment includes a vertically long absorbent main body 2 having a longitudinal direction and a width direction in plan view, and a longitudinal direction of the absorbent main body 2. And a pair of substantially trapezoidal flap portions 3 and 3 ′ extending outward in the width direction at a position closer to the front side of the central portion.

In the present embodiment, as shown in FIG. 3, the absorption main body portion 2 is located on the skin facing surface side in the thickness direction T and has a liquid-permeable surface sheet 21 having a light transmittance of 45% or more, a liquid impermeable back sheet 23 located in the non-skin-facing side, an absorbent body 22 having a plurality of slits S and the wide slit portion S _E extending in the width direction W with positioned between the respective sheets, stretchable sheet having a (non-skin located on opposite side of the other words, the absorber 22) and at least said longitudinal stretch will be described later in the rear region a ₃ located between the absorbent body 22 and backsheet 23 24 and a plurality of pressure-sensitive adhesives 9 that extend continuously or intermittently in the width direction on the surface of the back sheet 23 on the non-skin facing surface side are arranged along the longitudinal direction L (in a so-called stripe shape). Dressed Comprising a titration, the adhesive portion, and is configured to be able to absorb and retain liquid excrement such as menstrual blood discharged from the wearer.
On the other hand, as shown in FIGS. 1 and 2, the pair of flap portions 3, 3 ′ has a topsheet 21 that extends outward in the width direction W from the absorbent main body portion 2 in the thickness direction T, and A back sheet 23 extended outward from the absorbent body 2 in the width direction W, and an adhesive part for fixing clothes extending in the longitudinal direction L, disposed on the surface of the back sheet 23 on the non-skin facing surface side 4, 4 '.

When the sanitary napkin 1 is worn, the absorbent body 2 is opposed to the skin of the wearer's clothing (such as underwear) by the adhesive 9 disposed on the non-skin-facing surface side of the absorbent body 2. After fixing to the surface on the surface side, the pair of flap portions 3 and 3 ′ were folded back to the non-skin facing surface side of the clothing, respectively, and arranged on the non-skin facing surface side surface of each of the flap portions 3 and 3 ′. It is used by being fixed to the surface on the non-skin facing surface side of the clothing by the adhesive portions 4, 4 ′. Therefore, when the sanitary napkin 1 is worn, the surfaces on the non-skin facing surface side of the pair of flap portions 3, 3 ′ are surfaces facing the wearer's skin surface.
For fixing the sanitary napkin 1 to the wearer's clothes, the adhesive 9 in the absorbent main body 2 and the adhesive used in the adhesive portions 4 and 4 ′ in the flap portions 3 and 3 ′ are absorbent articles. The adhesive is not particularly limited as long as it can be fixed to the wearer's clothes (such as underwear). For example, any adhesive such as a styrene polymer can be used. In addition, since a pair of above-mentioned flap part is not an essential component in the absorbent article of this invention, the absorbent article of this invention does not need to have the said pair of flap part.

In the present embodiment, as shown in FIG. 1, the absorption main body 2 has a front side edge in the longitudinal direction L that is located on the wearer's front side (abdomen side) when wearing the sanitary napkin 1 in plan view. Part 5 and a rear side edge 6 in the longitudinal direction L located on the wearer's rear side (back side) when the sanitary napkin 1 is worn, and further, between these edge parts 5, 6. In the longitudinal direction L, the front side area A ₁ located on the front side of the sanitary napkin 1, the rear side area A ₃ located on the rear side of the sanitary napkin 1, and these areas A ₁ , And an excretion opening corresponding area A ₂ located between A ₃ . In FIG. 1, these areas A _{1 to} A ₃ are each divided by a first imaginary straight line L ₁ and a second imaginary straight line L ₂ that extend in the width direction W. Further, the absorber 22 in the absorber body 2, as shown in FIG. 1, are arranged so as to extend over from the front side region A ₁ on the rear side region A _3.

Here, in the present specification, the “excretion opening-corresponding area” refers to an area facing or abutting the wearer's excretion opening when the absorbent article is worn, and the type and use of the absorbent article (specifically, Is an area that is appropriately set for each type of absorbent article according to the type of liquid excreta such as urine, feces, menstrual blood, and the age and sex of the intended wearer.
In addition, the excretion opening corresponding region is usually a position near the center or the front side in the longitudinal direction of the absorbent article (for example, in the case where the absorbent article is an absorbent article having an absorbent main body portion and a flap portion, in plan view). In the absorption main body portion, the front portion overlaps in the longitudinal direction with the flap portion, and the absorbent article has a constricted portion constricted on the inner side in the width direction at a substantially central portion in the longitudinal direction. In the case of an absorbent article composed of an absorbent main body, in a plan view, the position corresponds to the constricted portion in the absorbent main body, and when the absorbent article is composed of an oval absorbent main body. , The position of the substantially central portion straddling the longitudinal central axis extending in the width direction of the absorbent main body portion), and the longitudinal length of about 1/3 or more of the entire longitudinal length of the absorbent article, and the width of the absorbent article About 1/3 or more of the total length in the direction For example, when the absorbent article is a night napkin or the like, the length in the longitudinal direction of the excretory opening corresponding region is less than 1/3 of the total length in the longitudinal direction of the absorbent article. It may be set to be.

The sanitary napkin 1 according to this embodiment, as shown in FIGS. 1 and 3, comprises a stretchable sheet 24 located between the absorbent body 22 and backsheet 23 in the rear region A _3, further, the absorber 22, in plan view, in the stretchable sheet 24 and the rear-side area a ₃ overlapping in the thickness direction T, the slit portion existing areas where there are a plurality of slits S extending in the width direction W In addition to having A _E , in the excretion opening corresponding area A ₂ , it has a slit part non-existing area N ₂ where the slit part S does not exist.
Further, the slit portion existing region A _E, as shown in FIG. 1, three areas which divided into three equal parts the slit portion existing area A _E in the longitudinal direction L, that, most against excretion corresponding regions A ₂ The first existence area a ₁ located on the proximal side, the second existence area a ₂ located on the most distal side with respect to the excretion opening corresponding area A ₂ , and the central existence area a located between these two areas _C, and the first existence area a ₁ is wider in the longitudinal direction L of the sanitary napkin 1 than the slit part S in the central existence area a _C (that is, the width direction of the slit part) A wide slit portion _SE is included.
In FIG. 1, the slit portion existing area A _E is divided into three equal parts in the longitudinal direction L by a first imaginary straight line l ₁ for three equal divisions and a second virtual straight line for third equal division l ₂ . three regions which are fractionated by the virtual straight line (i.e., the first existing areas a _1, a central presence regions a _C and the second existing region a ₂₎ are each in the width direction central axis on the C _L extending in the longitudinal direction L the same Have a length in the longitudinal direction.

  Here, in this specification, the “slit part” means a cut that penetrates the absorber in the thickness direction, and the direction in which the slit part extends (that is, the longitudinal direction of the slit part) is orthogonal to the direction. Direction (that is, the width direction of the slit portion). In the present embodiment, the longitudinal direction and the width direction of the slit portion S are parallel to the width direction W and the longitudinal direction L of the sanitary napkin 1, respectively.

Further, in the present specification, the “wide slit portion” is a slit portion that is widened in the width direction with respect to the slit portion in the center existing region a _C (that is, the length of the slit portion in the width direction is long). Means. Specifically, an average value (mm) obtained by measuring the length (mm) in the width direction of any 10 slit portions in the center existing area a _C is set as a reference value, and is larger than this reference value. A slit portion having a width direction length (mm) is referred to as a wide slit portion.

The sanitary napkin 1 according to this embodiment is the light transmittance of the topsheet 21 is 45% or more, and, the slit portion existing region A first existing area in _E a ₁ of the absorbent body 22 _(i.e., since the region where the wearer of the sanitary napkin 1 is close to the likely corresponding to the excretion area a ₂ noted before wearing) it contains a wide slit portion S _E, wearer, before wearing the sanitary napkin 1, the wide slit portion S _E of the first presence region a ₁ in proximity to the corresponding to the excretion area a ₂ (more specifically, the non-skin of the absorbent body 22 through the opening or openings of the wide slit portion S _E The stretchable sheet 24 disposed on the opposite surface side) is easily recognized through the topsheet 21 due to a color difference (difference in lightness, color, etc.) from its peripheral part. Thereby, the sanitary napkin 1 according to the present embodiment wears a sense of expectation that the sanitary napkin 1 is a high-quality sanitary napkin that is particularly excellent in stretchability by having a plurality of slit portions S. It can be nurtured by the previous wearer.

Here, FIG. 4 is a perspective view schematically showing a state in which the sanitary napkin 1 according to the present embodiment is twisted in a direction twisted around the longitudinal direction L as an axis. Sanitary napkin 1 according to this embodiment, in the rear region A ₃ which is a region corresponding to the buttocks of the wearer when worn, the extendable elastic sheet 24 at least in the longitudinal direction L, the slits in the absorbent body 22 and a part presence area a _E (i.e., the rear side region a ₃ is constituted easily be deformed in a direction to twist as easily and axis the longitudinal direction L is curved deformed along the longitudinal direction L) Therefore, when the wearer performs an operation such as walking, the wearer by the buttocks moves right and left alternately, the rear side of the area a ₃ slits present in the region a _E in the direction sanitary napkin 1 is twisted even force is applied, (see Figure 4) by deforming in a direction in which the slit portion existing area a _E is twisted above in accordance with the movement of the wearer, wherein the rear region a ₃ wearer's buttocks Skin surface It is possible to maintain a state of being in close contact with (that is, an excellent wearing feeling can be obtained). At the same time, it is buffered direction of the force twists described above by the deformation of the rear region A _3, it becomes difficult to transfer to the adjacent corresponding to the excretion area A _2, the excretion corresponding region A _{2 (in} particular, slit portion In the slit non-existing region N ₂ where S does not exist, the shape of the absorber 22 can be easily maintained, and the liquid excreta discharged from the wearer can be stably absorbed over a long period of time.

Furthermore, the sanitary napkin 1 is provided with the stretchable sheet 24 having stretchability in at least the longitudinal direction L in the rear region A _3, it is possible to secure the stretch in the rear region A _3, it is possible to obtain the effect that it is possible to maintain a state where the rear region a ₃ described above in close contact with the skin surface of the wearer's buttocks more reliably. In addition, even if the wearer stretches the sanitary napkin 1 in the longitudinal direction L before wearing and confirms its stretchability, the stretchable sheet 24 allows the above-described slit portion S to be opened from the open state. Since it is easy to return to the original closed state, it is possible to more reliably obtain the expected excellent wearing feeling and absorption performance.

In this manner, the sanitary napkin 1 according to this embodiment, prior to wear, by the wide slit portion S _E described above is visible to the wearer, the sanitary napkin 1 comprises a plurality of slits S In addition, the wearer can be expected to be expected to be a high-quality sanitary napkin that is particularly excellent in stretchability (that is, excellent in wearing feeling). Moreover, not only in a sense of expectation but also in actual wearing, an excellent wearing feeling and high absorption performance can be exhibited.

  Hereinafter, various members constituting the absorbent article of the present invention will be described in more detail using the sanitary napkin 1 according to the above-described embodiment.

[Surface sheet]
In the sanitary napkin 1 according to the present embodiment, as shown in FIGS. 1 and 3, the topsheet 21 has a thickness direction in a region extending from the front region A ₁ to the rear region A ₃ of the sanitary napkin 1. It is arrange | positioned at the skin opposing surface side of T, and is comprised by the liquid-permeable sheet member which can contact a wearer's skin surface directly. Such a liquid permeable sheet member is not particularly limited as long as it satisfies the light transmittance requirements described later, and is, for example, a span formed using cellulose fibers or thermoplastic resin fibers subjected to hydrophilic treatment. Conventionally known non-woven fabrics such as lace non-woven fabrics and air-through non-woven fabrics can be used, but the surface sheet of the present invention has stretchability or extensibility in at least one direction (direction corresponding to the longitudinal direction L of the absorbent article). It is preferable to use a liquid-permeable sheet member having the same. When a liquid-permeable sheet member having such stretchability or extensibility is used as the surface sheet, the absorbent article is more easily deformed in accordance with the wearer's movement (that is, excellent in dynamic fit). Therefore, a feeling of wear can be further improved.

  The liquid permeable sheet member having stretchability described above is not particularly limited, for example, stretchable nonwoven fabric such as urethane resin spunbond nonwoven fabric subjected to hydrophilic treatment; made of urethane resin stretched at least in one direction Laminated nonwoven fabric having a concavo-convex structure in which a spunbond nonwoven fabric and an air-through nonwoven fabric are integrated by dot-like embossing; hydrophilic treatment comprising an elastic resin such as urethane resin or ethylene-vinyl acetate copolymer resin (EVA) A perforated film or the like to which can be applied can be suitably used.

Further, the liquid-permeable sheet member having the above-described extensibility is not particularly limited, and for example, a nonwoven fabric having a concavo-convex structure that can be extended in one direction (a direction corresponding to the longitudinal direction L of the absorbent article) is suitable. Can be used. As such a concavo-convex structure, for example, in a plan view, a plurality of linear ridges extending in the width direction of the surface sheet and arranged at a predetermined interval in the longitudinal direction, and between the adjacent ridges and Examples include a concavo-convex structure including a plurality of linear concave grooves extending in the width direction of the top sheet, and having a substantially wavy cross-sectional shape along the longitudinal direction. Here, the said protruding item | line part protrudes toward the skin opposing surface side in the thickness direction of a surface sheet, and the said groove part has a structure dented in the non-skin opposing surface side in the thickness direction of the surface sheet. .
In the present invention, the structure that can be adopted as the stretchable concavo-convex structure is not limited to the above-described aspect, and for example, a plurality of convex portions as disclosed in Japanese Patent No. 5829349 and Japanese Patent No. 5829326 The aspect etc. which were comprised by the (groove part) and the groove part which has a some recessed part are employable.

  The method for forming the stretchable concavo-convex structure as described above on the liquid permeable sheet member to be the top sheet is not particularly limited. For example, a method of continuously blowing a gas (for example, air) on the fiber web, Any shaping method such as a compression molding method or a gear stretching method can be employed.

  Further, in the present invention, the liquid permeable sheet member having stretchability or extensibility used for the top sheet may have the above stretchability or extensibility in the entire region (entire surface). It is preferable that only the region corresponding to the stretch region (that is, the slit portion existence region) has the above-described stretchability or stretchability. By using such a partially permeable or extensible liquid-permeable sheet member for the topsheet, the region corresponding to the stretched region of the absorber is more easily deformed in accordance with the wearer's movement. Therefore, the state where the region is in close contact with the wearer's skin surface can be more reliably realized, while in the excretion opening corresponding region of the absorbent article, the above-described twist applied to the rear region of the absorbent article Since the force of the direction is not easily transmitted to the excretion port corresponding region, and the shape of the absorption main body in the excretion port corresponding region is further easily maintained, the liquid excretion discharged from the wearer is more stably absorbed. Can do.

  And the surface sheet 21 in this embodiment has a light transmittance of 45% or more. In addition, the surface sheet in the present invention does not need to have a light transmittance of 45% or more in the entire region (entire surface), and has a light transmittance of 45% or more in at least the above-described rear region. Just do it. When the light transmittance of the surface sheet is 45% or more, the wearer absorbs the member such as the absorber disposed on the non-skin facing surface side of the surface sheet through the skin facing surface side of the surface sheet. Through the above-mentioned wide slit portion formed in the body (more specifically, the opening of the wide slit portion or the stretchable sheet disposed on the non-skin-facing surface side of the absorbent body through the opening), through the surface sheet It can be visually recognized.

  The light transmittance of the top sheet is preferably 50% or more, and more preferably 55% or more from the viewpoint of transparency.

  Here, “light transmittance” in the present invention means “total light transmittance” measured according to “Measurement method A” of 5.5.2 of JIS K7105-1981. The total light transmittance is measured using a colorimetric color difference meter (model NDH-300A) manufactured by Nippon Denshoku Industries Co., Ltd. under predetermined conditions (light receiving element: silicon photocell, filter conforming to JIS K7105-1981). : Color glass filter Y, measurement area: φ12 mm).

In the present invention, the size and shape of the surface sheet is not particularly limited as long as it can cover the surface of the absorbent body on the skin-facing surface side, and is suitable for the size, sex, use, etc. of the person wearing the absorbent article. Depending on the size, an arbitrary size and shape can be adopted. The basis weight of the topsheet is not particularly limited as long as it does not inhibit the effects of the present invention, for example, it can be adopted a basis weight in the range of ^{5g / m 2 ~100g / m 2} , light transmittance , liquid-permeable, in view of flexibility, preferably in the range of ^{20g / m 2 ~50g / m 2} . The basis weight can be measured according to JIS L 1906 5.2.

  Further, the thickness of the surface sheet is not particularly limited as long as the effect of the present invention is not impaired, and for example, a thickness within the range of 0.001 mm to 5.0 mm can be adopted. From the viewpoint of properties and flexibility, the thickness is preferably in the range of 0.01 mm to 3.0 mm, and more preferably in the range of 0.1 mm to 1.0 mm.

  Here, the thicknesses of the top sheet and the back sheet to be described later can be measured according to the following <Method for measuring thickness of sheet member>. In addition, when an absorbent article contains sheet members (for example, liquid diffusable sheet etc.) other than a surface sheet and a back surface sheet, it can measure similarly about the thickness of the said sheet member.

<Method for measuring thickness of sheet member>
(1) A sample sheet having a predetermined size (for example, 100 mm × 100 mm) is cut out from the sheet member to be measured.
(2) The cut sample sheet is set in an automated compression tester “KES FB-3A” manufactured by Kato Tech Co., Ltd., and the thickness (mm) when the pressure on the sample sheet by the measurement terminal of the tester is 49 Pa. ) And the measured thickness (mm) is taken as the thickness of the sample sheet.

[Absorber]
Next, the absorber used in the present invention will be described. FIG. 5 is a plan view of the absorbent body 22 used in the sanitary napkin 1 according to the above-described embodiment in an unstretched state (natural state), and FIG. 6 is an absorbent body 22 used in the sanitary napkin 1. FIG.

In the sanitary napkin 1 according to the present embodiment, the absorbent body 22 is disposed between the top sheet 21 and the back sheet 23 in the thickness direction T as shown in FIG. It is an absorptive member which absorbs and holds a wearer's liquid excrement. In the present embodiment, as shown in FIG. 1, the absorbent body 22 has a front edge 221 and a rear edge 222 in the longitudinal direction L in an arc shape on the front side and the rear side, respectively, in a plan view. It has a protruding longitudinal profile shape and is disposed in the central region including the widthwise center axis C _L extending in the longitudinal direction L. In addition, the absorber in this invention is not limited to the thing of such an aspect, For example, you may have arbitrary external shapes, such as a rectangle, an ellipse, and an hourglass shape. Further, the position at which the absorbent body is disposed is not particularly limited as long as it includes at least the entire region corresponding to the excretion opening, and the absorbent body may be disposed biased toward the front in the longitudinal direction of the absorbent article.

Further, in this embodiment, the absorber 22, except that a plurality of slits S and the wide slit portion S _E described above are formed is not particularly limited, a known arbitrary absorber in the art be able to. Examples of such an absorbent include those in which an absorbent material containing a water-absorbing fiber such as pulp and / or a superabsorbent polymer is covered with a liquid-permeable covering sheet such as at least one tissue. .

  In the present invention, the thickness of the absorber is not particularly limited as long as the effect of the present invention is not impaired, and for example, a thickness within the range of 0.1 mm to 10 mm can be adopted. From the viewpoint of flexibility, the thickness is preferably in the range of 0.3 mm to 3 mm.

  Further, in the present embodiment, as shown in FIG. 5, the plurality of slit portions S formed in the absorber 22 are arranged such that the slit portions S adjacent to each other in the longitudinal direction L are one in the longitudinal direction L in plan view. It arrange | positions so that a part may overlap (in other words, slit part S adjacent to the longitudinal direction L may not overlap completely in the said longitudinal direction L). When the plurality of slit portions are arranged in this way, when the extension region of the absorbent body formed by the plurality of slit portions is deformed in the twisted or longitudinal direction by the wearer's operation or the like, It is difficult for the absorber to be torn in the slit portion and to be broken in the longitudinal direction. In addition, in the absorber, a portion where the slit portion does not exist can exhibit a predetermined absorption performance. Therefore, if such a portion is arranged without being unevenly distributed in the extension region of the absorber, the extension is performed. Good absorption performance can be exhibited even in the region.

Here, the extension area | region and low extension area | region of the absorber 22 in this embodiment are demonstrated. As shown in FIG. 1, the absorber 22 has no front slit portion in which no slit portion is formed as a low extension region having a relatively low extension rate or a non-extension property in the front side region A ₁ . has an area N _1, further, in the excretion portion corresponding regions a _2, a relatively low stretch rate or a low elongation region of the inextensible, no slits are formed corresponding to the excretion area in the slit portion non has a presence area N _2, these slits absence regions N _1, N ₂ is the widthwise central portion of the absorbent body 22 (i.e., the portion extending over the width direction center axis C _L extending in the longitudinal direction L) In order to be continuous. Such an arrangement, although not an essential configuration in an absorbent article of the present invention, the low elongation region of the absorber is present across the front area A ₁ to the corresponding to the excretion area A _2, the absorption Since it is possible to secure a wide area where the shape of the body is easily maintained (that is, difficult to be deformed), the front area A ₁ and the excretory mouth corresponding to the wearer's movement and underwear are relatively less affected in the region a _2, more stable over the liquid exudates discharged from the wearer for a long time, can be more reliably absorbed.

Further, as shown in FIG. 1, the absorbent body 22 in the present embodiment is compared with the above-described low extension region (that is, the slit-existing region N ₂ in the excretion port corresponding region) in the excretion port corresponding region A ₂ . The side slit part existence area A _ES which is located on the outer side in the width direction W of the absorber 22 and includes a plurality of slit parts S similar to the plurality of slit parts S in the rear side area A ₃ described above. The absorbent body 22 is configured to be extendable at least in the longitudinal direction L in the side slit portion existence area _AES . Although such a configuration is not an essential configuration in the absorbent article of the present invention, if the absorbent body has such a side slit portion existence region _AES as an extension region, such as walking of the wearer or have force is transmitted to twists from the rear side region a ₃ described above by the operation, or even when the or force is applied in the width direction W of the absorbent article by the groins of the wearer, the above-mentioned side it is possible to slit portion existing area a _ES to buffer these forces by stretching or deformation, low elongation region of the widthwise central portion in the excretion portion corresponding region a ₂ of the absorbent body (i.e., corresponding to the excretion area The shape of the slit part non-existing region N ₂ ) is more easily maintained. As a result, in the excretion portion corresponding regions A _2, can be further absorbed stably liquid exudates discharged from the wearer.
Incidentally, the side slit portions existing area A _ES described above, the absorbent for a region existing corresponding to the excretion area A ₂ of the article, the slit portion existing area A _E present in the rear region A ₃ of the absorbent article This is a different area.

Then, the absorbent body 22 in the present embodiment, in plan view, in the stretchable sheet 24 and in the rear region A ₃ overlapping in the thickness direction T, there are a plurality of slits S extending in the width direction W It has a slit portion existence area _AE as an extension area. Such slits existing area A _E, as described above, three areas which divided into three equal parts the slit portion existing area A _E in the longitudinal direction L, that, located on the most proximal with respect to corresponding to the excretion area A ₂ A first existence area a ₁ , a second existence area a ₂ located most distal to the excretion opening corresponding area A ₂ , and a central existence area a _C located between these two areas. and it is, the first presence region a ₁ includes a wide slit portion S _E than the slit portion S is wider in the longitudinal direction L of the central existence region a _C. Furthermore, in the present embodiment, the second existence region a ₂ also includes a wide slit portion S _E (not shown).

When the absorbent body 22 has such an extension region (that is, the slit portion existence region A _E ) in the rear side region A ₃ , when the wearer performs an operation such as walking, the rear portion extension region in the side region a ₃ is, wearer motion (in particular, the right and left alternating motion at the hips) in accordance with the elongation or the like and underwear, as well as deformation of the direction of twist of the above, also parallel elongation in the longitudinal direction L by, absorber 22, it can be brought into close contact with the rear side area a ₃ of the absorbent main body 2 and hence, the skin surface more accurately wearer. Further, the absorber 22 in the present embodiment, since the wearer to the first existing region a ₁ in proximity to easily corresponding to the excretion area A ₂ attention has wide slit portion S _E above, wear who, before wearing the sanitary napkin 1, the wide slit portion S _E above (more specifically, the non-skin facing side of the absorbent body 22 through the opening or openings of the wide slit portion S _E The stretchable sheet 24 to be disposed) is easily recognized through the topsheet 21 due to a color difference (difference in lightness, color, etc.) from its peripheral part.
Further, in this embodiment, the absorber 22 includes the slit portion existing area A wide slit portion S _E in the second presence region a ₂ in _E (i.e., so as to sandwich the central existence region a _C because it contains wide slit portion S _E) to the wearer, over the wide slit portion S _E of the first presence area a ₁ to a wide slit portion S _E of the second present area a ₂ region Can be recognized as a region where a plurality of slit portions S are present (that is, a stretchable region), and a higher expectation for the quality (particularly, the feeling of wearing) of the sanitary napkin 1 can be nurtured by the wearer.

Moreover, not only the feeling of expectation before wearing but also the sanitary napkin 1 according to the present embodiment, the absorbent body 22 has the slit portion existing area A _E (elongated area) in the rear side area A ₃ . Therefore, when the wearer performs an operation such as walking, the extension region is deformed in the above-described twisting direction in accordance with the wearer's movement (particularly, left and right alternating movement in the buttocks) and underwear elongation. well, also extend deformed in the longitudinal direction L, and rear region a ₃ including the extension regions, can be brought into close contact with the greater skin surface accurately and more reliably wearer. Furthermore, when the absorbent body 22 occupying most of the thickness of the absorbent main body 2 of the sanitary napkin 1 has the plurality of slits S described above, the absorbent main body 2 is flexible as well as the absorbent body 22 ( In particular, since it is excellent in flexibility (thickness direction and width direction), it is possible to exhibit further excellent body compatibility (ie, fit) as a sanitary napkin (absorbent article).

Here, in this specification, “elongation” means 5.0 N in two predetermined directions opposite to each other according to the method described in “6.3 Tensile strength and elongation” of JIS L 1913: 2010. When pulled by force, it stretches 3% or more with respect to the length (100%) of the natural state (that is, the state before stretching) without breaking, ie, the length after stretching is 103% or more. Means to grow). Further, in this specification, the “elongation rate” is 5.0 N in two predetermined directions opposite to each other according to the method described in “6.3 Tensile strength and elongation rate” of JIS L 1913: 2010. When pulled by force, it means the rate of increase (%) of the length of the stretched object (ie, the length after stretching) relative to the length of the natural state (ie, the state before stretching). Can be obtained by the following equation.
Elongation rate (%) = [(length after elongation of object (mm)) − (length of object in natural state (mm))] / (length of object in natural state (mm)) × 100
In this specification, “non-elongation” means 5.0 N in two predetermined directions opposite to each other according to the method described in “6.3 Tensile strength and elongation” of JIS L 1913: 2010. When pulled by force, it means that the material does not stretch 3% or more with respect to the length of the object in the natural state without breaking. Therefore, “non-elongation” means less than 3% with respect to the length of the object in the natural state (100%) in addition to breaking without exceeding 3% with respect to the length of the object in the natural state. It also includes stretching (ie, “minimal stretching” where the length after stretching is less than 103%). In this specification, the “low extension region” refers to a region having a relatively low extension rate relative to the “extension region”, and the low extension region includes an extension region having a relatively low extension rate. Non-extension regions are also included.

  Further, in this specification, “extension / contraction” means that an object is stretched to a stretching rate of 100% by pulling the object in two opposite directions with a predetermined force and then contracted by 70% or more when the force is released. (That is, the length after contraction is 130% or less with respect to the length (100%) of the object in the natural state (the state before extension)).

Further, in the present embodiment, as shown in FIG. 5, the plurality of slit portions S in the slit portion existence area A _E of the absorber 22 is a predetermined number of slit portions S in the slit portion existence area A _E. there a slit portion existing small area a _S present, are arranged so as to have a slit portion absence small area a _N of slits S are not present, the. Further, as shown in FIG. 5, the slit portion non-existing small region _AN is, in plan view, from one end (one end on the left side in FIG. 5) to the other end (the right side in FIG. 5) in the width direction W of the absorber 22. A first non-existing small region A _N1 extending toward the front side (upper side in FIG. 5) and one end of the absorbent body 22 in the width direction W, intersecting the first non-existing small region A _N1. A second non-existing small region _AN2 extending rearward (downward in FIG. 5) from one end (left end in FIG. 5) to the other end (right end in FIG. 5), and the presence of the slit portion. small area a _S, the area surrounded by the first absence small area a _N1 and the second absence small area a _N2, or the second absence small and the first absence small area a _N1 widthwise end edges and area a _N2 extending in the longitudinal direction L of the absorber 22 It is arranged in a region surrounded by a _1, e _2.

When the plurality of slit portions S are arranged in this way, the absorbent body has slit portion non-existing small regions A _N extending in the two specific directions (that is, the first non-existing small region A _N1 and the second non-existing region). by having a small area a _N2), the strength and absorption performance as an absorber can be sufficiently ensured, also, a slit portion existing small area a _S surrounded by the slit portion absence subregion a _N By having it, as shown in FIG. 6, the whole absorber can be extended uniformly, and the extension range can be made longer. As a result, even when the wearer's movement or the like is large, the force applied to the absorbent body can be sufficiently buffered, so that the rear region can be more reliably maintained while maintaining good absorption performance. Can adhere to the skin surface.

  In the absorbent article of the present invention, the arrangement form of the plurality of slit parts in the absorbent body is not limited to the arrangement form of the above-described embodiment, and the plurality of slit parts include, for example, a predetermined number of slit parts. The existing slit part existence small area may be arranged in an area surrounded by the slit part nonexistence small area provided in a grid shape. Furthermore, although the above-mentioned several slit part can be arrange | positioned by arbitrary patterns, it is preferable to arrange | position so that it may not line up on the straight line over the full length of the width direction W of an absorber. When the plurality of slit portions are arranged in this manner, it is possible to prevent the plurality of slit portions arranged in a straight line from acting like a perforation line and tearing the absorber.

  Moreover, in this embodiment, as shown in FIG. 5 etc., although the slit part S is formed in the substantially linear planar view shape extended in the width direction W, in the absorbent article of this invention, it is like this. Without being limited to such an embodiment, the slit portion can have an arbitrary plan view shape as long as the effects of the present invention are not impaired. Examples of such planar view shapes include arc shapes, V shapes, waveforms, zigzag shapes, and the like.

  In the present invention, the longitudinal lengths of the slit portion and the wide slit portion formed in the absorber are not particularly limited, but are preferably in the range of 3 mm to 50 mm, and more preferably in the range of 5 mm to 15 mm. . When the length is 3 mm or more, the stretched region (slit portion existing region) of the absorber is further easily deformed in the twisting direction, and the stretched region can be sufficiently stretched in the longitudinal direction L. Furthermore, moderate flexibility can be imparted to the absorber. When the length is 50 mm or less, when the absorber receives force from the outer side in the width direction W, it is difficult for the slit part and the wide slit part to open and tear, Good durability as an absorber can be secured.

  In the present invention, means for forming the plurality of slit portions in the absorber is not particularly limited, and any cutting means can be adopted. For example, while transporting the absorbent body manufactured by an arbitrary manufacturing method by a transport means such as a belt conveyor, a plurality of a plurality of provided in a predetermined arrangement pattern on the peripheral surface of the rotating cutting roll on the upper surface of the absorbent body A plurality of slit portions as described above can be formed in the absorbent body by pressing the cutting blade to penetrate.

  Further, the means for forming the wide slit portion in the absorber is not particularly limited. For example, as in the above-described means for forming the plurality of slit portions, any means capable of forming a slit portion wider than the slit portion described above. A method using a cutting means or a method of forming a plurality of slit portions in the absorber and then applying a predetermined tension in the longitudinal direction of the absorber and opening the predetermined slit portion in the longitudinal direction to widen the width is adopted. be able to. The plurality of slit portions and the wide slit portion may be formed simultaneously by the former method, or the wide slit portion may be formed after forming the plurality of slit portions by the former method or the latter method.

Further, in this embodiment, the absorber 22, as shown in FIG. 1, in the rear region A _3, the rear end of said rearward side region A ₃ of the slit portion existing area A _E and the absorber 22 located between the edge 222, and a rear-side slits absence region N ₃ as a low elongation region. Structure having such rear slits absence region N _3, although not an essential configuration in the present invention, the rear-side area A _3, the slit portion existing area A _{E (extension} area) and the rear side The region between the end edge 222 is a region that is relatively less affected by the wearer's movement and underwear elongation, and in this region, the rear slit portion non-existing region N ₃ having a relatively high strength. If There are disposed, it is possible to some extent ensuring the strength of the absorbent body 22 in the rear region a ₃ of the sanitary napkin 1 (absorbent article), shapeless and breakage hardly occurs in the absorber 22 In addition, the absorption performance of the absorber can be more stably exhibited.

  Moreover, in this invention, it is preferable that the above-mentioned back side slit part non-existence area | region is an area | region containing the edge of the back side of an absorber. When the wearer is wearing the absorbent article, the wearer is not able to use the rear slit portion non-existing area when the relatively high strength rear slit part non-existing area is an area including the rear edge of the absorbent body. The wearer adjusts the position of the absorbent article to a more appropriate position while wearing the absorbent article because it is easy to adjust the position of the absorbent article in a state of being gripped and fixed to the clothes such as underwear. As a result, it is possible to obtain a better wearing feeling and a sense of security.

  Furthermore, in this invention, it is preferable that the above-mentioned back side slit part non-existence area | region contains the embossed part. When the rigidity of the rear slit part non-existing region is increased by the embossed part, the wearer grasps the rear slit part non-existing region and positions the absorbent article in a state of being fixed to clothes such as underwear. Furthermore, since it becomes easy to adjust, the further excellent feeling of wear and a sense of security can be obtained. Moreover, when the absorber includes the wide slit portion in the second existence region in the above-described slit portion existence region, the wearer is likely to pay attention to the rear slit portion non-existence region adjacent to the second existence region. When the embossed portion exists, the wearer can more easily recognize the wide slit portion in the second existence region together with the embossed portion before wearing the absorbent article. As a result, the wearer can use a region extending from the wide slit portion in the first existence region to the wide slit portion in the second existence region as a region in which a plurality of slit portions exist (that is, a stretchable region). It becomes easy to recognize, and a high expectation with respect to the quality (especially wearing feeling) of an absorbent article can be made to a wearer more reliably and more effectively.

<Elastic sheet>
In the sanitary napkin 1 according to the present embodiment, the stretchable sheet 24 that can be stretched at least in the longitudinal direction L is a rear-side region that is a region corresponding to the wearer's buttocks when worn as shown in FIGS. 1 and 3. in a _3, between the absorbent body 22 and backsheet 23 (i.e., the non-skin facing side of the absorbent body 22) is disposed, stretch for imparting elasticity to the rear side area a ₃ of the sanitary napkin 1 It is a sheet member. Incidentally, stretchable sheet 24, as described above, is disposed at a position overlapping the slit existing area A _E and the thickness direction T in the rear region A ₃ of the absorbent body 22, the thickness and the slit portion existing area A _E of It is not arranged in a portion that does not overlap with the direction T.
Sanitary napkin 1 according to this embodiment, due to the provision of such a stretchable sheet 24, while ensuring the stretchability in the rear region A _3, effects are achieved by the slits existing area A _E of the above The effect can be exhibited more reliably. In addition, even if the wearer extends the sanitary napkin 1 in the longitudinal direction L before wearing and confirms the stretchability thereof, the sanitary napkin 1 is contracted in the longitudinal direction L by the stretchable sheet 24. Since the above-mentioned slit part S is easy to return from the open state at the time of extension to the original closed state, it is possible to more reliably obtain an excellent wearing feeling and absorption performance in the sanitary napkin 1.

  In the present invention, the stretchable sheet is not particularly limited as long as it is a stretchable sheet member that can be stretched in at least one direction (direction corresponding to the longitudinal direction L of the absorbent article). A stretchable film formed from a thermoplastic resin; an elastic film formed from a polyester resin, or the like can be used.

Moreover, in this invention, it is preferable that the elastic sheet is comprised with the colored sheet colored in the color different from an absorber. When such a colored sheet is used for the stretchable sheet, the color of the colored sheet (stretchable sheet) and the absorbent body in which the above wide slit portion formed in the absorbent body is visually recognized through the opening of the wide slit portion. The difference (color difference such as lightness and color) is more easily recognized by the wearer, so that the effect produced by the above wide slit portion can be obtained more reliably. In addition, even if the whole sheet | seat including the inside of a sheet | seat is colored as long as the color of the sheet | seat opposite surface side surface (namely, surface on the absorber side) can be recognized as a color different from an absorber, the colored sheet | seat is colored. Both the skin facing surface side and the non-skin facing surface side may be colored, or only one surface of the skin facing surface side or the non-skin facing surface side may be colored. Even if only the surface on the non-skin facing surface side is colored, if the coloring is seen through the surface on the skin facing surface side, the colored sheet has a color different from that of the absorber on the surface on the skin facing surface side. Will be recognized.
The means for coloring the stretchable sheet member that becomes the stretchable sheet is not particularly limited, and means using a pigment or dye, means using printing, and the like can be employed.

  Furthermore, in the present invention, the above-described stretchable sheet may be a back sheet of an absorbent article. When the above-mentioned stretchable sheet is a back sheet that is easily visible to the wearer, the stretchability of the absorbent article is easily recognized from the backsheet, so that the absorbent article is particularly excellent in stretchability. The expectation that it is an absorbent article can be nurtured by the wearer more reliably and more effectively. Furthermore, if the above-described stretchable sheet is a back sheet, there is no need to separately provide a stretchable sheet between the absorber and the back sheet, so that the degree of freedom in product design is improved. Thereby, since an absorbent article can be thinned, a feeling of wear can further be improved.

<Back sheet>
In the sanitary napkin 1 according to the present embodiment, as shown in FIGS. 1 to 3, the back sheet 23 is in the thickness direction in the region extending from the front region A ₁ to the rear region A ₃ of the sanitary napkin 1. It is arrange | positioned at the non-skin opposing surface side of T, and is comprised by the liquid-impermeable sheet | seat member which prevents the leakage of liquid excretion, such as menstrual blood discharged | emitted from the wearer. Such a liquid-impermeable sheet member is not particularly limited, and for example, a conventionally known liquid-impermeable sheet such as a resin film such as polyethylene or polypropylene having air permeability, or a laminate in which a nonwoven fabric is bonded to the resin film. Although a member can be used, the back sheet in the present invention is preferably a liquid-impermeable sheet member having stretchability or extensibility in at least one direction (direction corresponding to the longitudinal direction L of the absorbent article). . When a liquid-impermeable sheet member having such stretchability or extensibility is used for the back sheet, the absorbent article is more easily deformed in accordance with the wearer's movement (that is, excellent in dynamic fit). Therefore, a feeling of wear can be further improved.

  The liquid impervious sheet member having stretchability described above is not particularly limited, and for example, a stretchable sheet member similar to the stretchable sheet described above can be suitably used. Further, the liquid-impermeable sheet member having the above-described extensibility is not particularly limited, and for example, a thermoplastic resin sheet having a bellows structure that can be extended in one direction (a direction corresponding to the longitudinal direction L of the absorbent article). A member etc. can be used conveniently.

Sanitary napkin one Oite according to this embodiment, the backsheet 23, as shown in FIGS. 2 and 3, and has the rear region the longitudinal direction L in extendable bellows structure in A ₃ B . 2 and 3, the bellows structure B includes a plurality of linear convex portions B ₁ extending in the width direction W of the back sheet 23 and arranged in the longitudinal direction L at a predetermined interval in plan view. And a plurality of linear grooves B ₂ positioned between adjacent convex portions B ₁ and extending in the width direction W of the back sheet 23, and the cross-sectional shape along the longitudinal direction L is substantially zigzag. It is the shape of. Here, the convex portion B ₁ has a structure protruding to the skin facing surface side of the back sheet 23 in the thickness direction T of the back sheet 23, and the groove B ₂ is the thickness direction of the back sheet 23. In T, it has the structure dented in the non-skin opposing surface side of the said back surface sheet 23. As shown in FIG.

With such backsheet 23 has a longitudinal direction L in extendable bellows structure B in the rear region A _3, by the bellows structure B extensibility in the longitudinal direction L of the rear region A ₃ it is possible to obtain more reliably, the rear region a ₃ is it is possible to more reliably achieve a state of close contact with the skin surface of the wearer, the direction of the twists of the above applied to the rear region a ₃ force, hardly transmitted to the excretion portion corresponding region a _2.

Additionally, if the absorbent body 22, such as in the present embodiment in which a plurality of slits S or the wide slit portion S _E described above is formed, typically, the liquid excrement such as menstrual blood discharged from the wearer Although easily reach the backsheet 23 through the slit portion S and the wide slit portion S _E, the backsheet 23 has a bellows structure B as described above, the liquid excrement which has reached the backsheet 23 , said along the groove portion B ₂ which extends in the width direction W of the bellows structure B is diffused in the width direction W, can be absorbed from a wide range of locations in the non-skin facing side surface of the absorbent body 22.

  Furthermore, if the back sheet has the bellows structure as described above, it is possible to impart flexibility, cushioning properties, etc. in the thickness direction of the absorbent article, further improving the wearing feeling of the absorbent article. Can be made. Moreover, when the back sheet which is easy to be visually recognized by the wearer has the bellows structure as described above, the absorbent article of the present invention has extensibility, stretchability, fit, flexibility and the like for the wearer. There is also an advantage that it is easy to recognize that it is a particularly excellent product.

  In the above bellows structure, the height of the convex portion (that is, the distance between the horizontal plane including the top of the convex portion and the horizontal plane including the bottom (deepest portion) of the groove) does not hinder the effect of the present invention. Although not particularly limited, for example, a height in the range of 0.1 mm to 1.2 mm can be employed, but preferably 0.2 mm to 1 in terms of extensibility, cushioning properties, liquid diffusibility, and the like. Within a range of 0.0 mm, and more preferably within a range of 0.4 mm to 0.8 mm.

  Further, the pitch of the bellows structure described above (that is, the interval (mm) between the top centers (ridge lines) of two adjacent convex portions) is not particularly limited, and is, for example, in the range of 0.5 mm to 5.0 mm. However, it is preferably within a range of 1.0 mm to 4.0 mm from the viewpoints of extensibility, cushioning properties, liquid diffusibility, and the like. The pitch of the bellows structure can be measured as a distance (mm) between the top centers (ridge lines) of two adjacent convex portions based on a planar photograph or planar image of the back sheet in a non-pressurized state. it can.

  In the present invention, the structure that can be adopted as the expandable bellows structure is not limited to the above-described embodiment. For example, the convex part and the groove part in the above-described bellows structure are at least partially oriented in plan view. It is possible to adopt a mode that extends while changing (for example, in a wave shape or a zigzag shape), a mode in which the interval between two convex portions adjacent at least partially is not constant, or the like.

  The method for forming the stretchable bellows structure as described above on the liquid-impermeable sheet member to be the back sheet is not particularly limited. For example, any application such as a compression molding method, a vacuum molding method, or a gear stretching method can be used. Shape method can be adopted.

  In the present invention, the liquid-impermeable sheet member having stretchability or stretchability used for the back sheet may have the stretchability or stretchability described above in the entire region (entire surface). It is preferable that only the area | region corresponding to the expansion | extension area | region (namely, slit part presence area | region) of an absorber has the above-mentioned stretchability or extendability like this embodiment. By using such a partially impermeable or stretchable liquid-impermeable sheet member for the back sheet, the region corresponding to the stretched region of the absorber is further deformed in accordance with the movement of the wearer. Therefore, in the region corresponding to the excretion opening of the absorbent article, the twist described above applied to the rear side region of the absorbent article can be realized more reliably. Force is more difficult to be transmitted to the excretory opening corresponding region, and the shape of the absorption main body in the excretion opening corresponding region is more easily maintained, so that liquid excretion discharged from the wearer is more stably absorbed. be able to.

  In the present invention, the size and shape of the back sheet is not particularly limited as long as it can prevent leakage of liquid excrement discharged from the wearer, and the size, sex, and use of the absorbent article wearer Any dimension and shape can be adopted depending on the above. Further, the thickness of the back sheet is not particularly limited as long as the effect of the present invention is not impaired. For example, a thickness in the range of 0.001 mm to 5.0 mm can be adopted, but the liquid impermeability and flexibility are not limited. From the viewpoints of properties and breathability, it is preferably in the range of 0.003 mm to 3.0 mm, more preferably in the range of 0.01 mm to 1.0 mm.

  In the sanitary napkin 1 according to the present embodiment, the top sheet 21 and the back sheet 23 are in the state where the absorbent body 22 and the elastic sheet 24 are sandwiched therebetween, and the outer peripheral edge of each sheet is a hot melt type. Are bonded to each other by an adhesive. The means for joining the top sheet and the back sheet is not particularly limited, and in addition to the above-mentioned adhesive, any joining means such as a heat seal method and an ultrasonic joining method can be adopted. Since the sheet is difficult to inhibit the above-described stretchability and extensibility, styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene- Bonding is preferably performed using a hot-melt adhesive such as ethylene copolymer (SEBS).

<Linear recess>
As shown in FIG. 1, the sanitary napkin 1 according to the present embodiment has a width with respect to the central axis C _{L in the} width direction in a plan view at least in the low extension region N ₂ of the excretory opening corresponding region A _2. Two linear recesses P and P ′ extending in the longitudinal direction L of the absorbent main body 2 and having a bottom portion with a higher density than other portions are provided on both sides in the direction. In the present embodiment, the linear recesses P and P ′ are formed by heating or non-laminating a laminated body in which the top sheet 21, the absorbent body 22, the stretchable sheet 24 and the back sheet 23, which constitute the absorption main body 2, are stacked in this order. It is formed by squeezing in the thickness direction T (toward the non-skin facing surface side) from the skin facing surface side surface of the top sheet 21 using a heating embossing means, and the linear recesses P, P The top sheet 21, the absorber 22 and the back sheet 23 are integrated at the bottom of '. In the present embodiment, the two linear recesses P, P ', as shown in FIG. 1, extends over the rear region A ₃ from the front side area A _1, the stretch The sheet 24 does not overlap in the thickness direction T.

  Although it is not an essential constituent requirement in the absorbent article of the present invention to have such a linear recess, if the absorbent article has such two linear recesses, the wearer's action Even when a force in the above-described twisting direction is applied to the rear region of the absorbent article due to, for example, or a force is applied in the width direction W of the absorbent main body by the wearer's buttocks, the excretory opening In the region that is the central portion of the corresponding region (that is, the region sandwiched between the two linear recesses), the shape of the absorbent main body is more easily maintained due to the rigidity of the hard linear recess. Liquid excretion such as menstrual blood discharged from the wearer can be more stably and steadily absorbed.

In the present invention, the shape of the linear concave portion in plan view is not particularly limited, and may be a straight line, a broken line, a zigzag, a geometry, as well as a shape (see FIG. 1) combining curves as in the above-described embodiment. Arbitrary shapes, such as a shape and a predetermined design shape (floral pattern etc.), can be adopted. In the embodiment described above, the two linear recesses P, P 'is viewed in plane, on both sides in the width direction with respect to the widthwise central axis C _L, the longitudinal direction of the absorbent main body 2 Although from the front area a ₁ along the L are arranged symmetrically over the rear region a _3, not limited to this form in the present invention, the linear recesses can, for example, both sides in the width direction with respect to the widthwise central axis C _L, even extend only to the corresponding to the excretion area, or from the excretion portion corresponding region of one of the said front region or the rear region It may extend over only the region, or may be arranged along the longitudinal direction L by a total of four or more. When a plurality of linear recesses are arranged, the rigidity of the absorption main body is increased, and the shape of the absorption main body is more easily maintained.

<Individual packaging>
Moreover, the absorbent article of this invention has at least 1 fold line extended in the said width direction by planar view, and the said fold line has overlapped with the said wide slit part in the said 1st existence area | region in thickness direction. Preferably it is. When the fold line overlaps with the wide slit portion in the first existence region in the thickness direction, when the absorbent article is folded in the longitudinal direction along the fold line and individually wrapped, the above wide slit portion is folded. Since the tension is applied in the longitudinal direction, the wide state (the widened state) of the wide slit portion can be more reliably held. As a result, even if the absorbent article is taken out from the individual package (in a state of being individually packaged) and deployed, the wide state of the wide slit portion is maintained, so that the effect produced by the wide slit portion is achieved. The effect can be exhibited more reliably.

  Moreover, in the absorbent article of this invention, it is preferable that the above-mentioned fold line is a mountain fold fold line from which the skin opposing surface side of an absorbent article becomes convex. When such a fold line is such a fold-fold fold line, when the absorbent article is fold-folded with the fold line, the opening on the skin facing surface side of the wide slit portion is longitudinally formed by the above-described fold-fold. It is in a state where tension is applied, and the state (wide state) of the opening on the skin facing surface side that is easily visible to the wearer in the wide slit portion can be more reliably held. Thereby, the effect produced by the above-mentioned wide slit part can be more reliably and more effectively exhibited.

In addition, the absorbent article of the present invention is not limited to the above-described embodiment, and can be appropriately combined and changed without departing from the object and spirit of the present invention.
In addition to the sanitary napkin of the above-described embodiment, the present invention can be applied to various absorbent articles such as a panty liner and a (light) incontinence pad. In this specification, ordinal numbers such as “first” and “second” are used to distinguish items with the ordinal numbers, and mean the order, priority, importance, etc. of each item. Not what you want.

1 Sanitary napkin (absorbent article)
2 Absorption main body part 21 Top sheet 22 Absorber 221 End edge on the front side of the absorber 222 End edge on the rear side of the absorber 23 Back sheet 24 Stretch sheet 3, 3 'flap part 4, 4' adhesive part 5 Front side Edge part 6 Rear side edge part A ₁ Front side area A ₂ Excretion area corresponding area A ₃ Rear side area A _E Slit part existence area a ₁ First existence area a ₂ Second existence area a _C Central existence area S Slit Part S _E Wide slit

Claims (8)

An absorbent article having a longitudinal direction, a width direction, and a thickness direction, comprising a top sheet that forms a skin facing surface of the absorbent article, and an absorbent body that is positioned on the non-skin facing surface side of the top sheet. ,
The absorbent article is, in plan view, in the longitudinal direction,
A front region located on the front side of the wearer when the absorbent article is worn;
A rear region located on the wearer's rear side when wearing the absorbent article; and
And an excretion opening corresponding area corresponding to the excretion opening of the wearer when wearing the absorbent article.
The absorbent article is provided with a stretchable sheet located on the non-skin facing surface side of the absorbent body and having stretchability in at least the longitudinal direction in the rear side region,
The surface sheet has a light transmittance of 45% or more in at least the rear region,
The absorbent body has a slit portion existence region in which a plurality of slit portions extending in the width direction are present in the rear region overlapping the stretchable sheet in the thickness direction in plan view, and the excretion opening Within the corresponding region, the slit portion does not exist, has a slit portion non-existing region,
The slit portion existing area is divided into three equal parts in the longitudinal direction of the slit portion existing area, the first existing area closest to the excretory opening corresponding area, and the most relative to the excretory opening corresponding area. A distal second presence region and a central presence region located between the two regions;
The first existence region includes a wide slit portion that is wider in the longitudinal direction than the slit portion in the central existence region.
The absorbent article.   The absorber has a rear side slit part non-existing area where no slit part exists in a rear side area of the slit part existing area, and the second existing area is more than a slit part in the central existing area. The absorbent article according to claim 1, further comprising a wide slit portion that is wide in the longitudinal direction.   The absorptive article according to claim 2 in which said back side slit part absence field is a field including the edge in the back side of said absorber.   The absorptive article according to claim 2 or 3 in which said back side slit part nonexistence field contains an embossed part.   The absorbent article according to any one of claims 1 to 4, wherein the stretchable sheet is a colored sheet having a color different from that of the absorber.   The absorptive article according to any one of claims 1 to 5 in which said elastic sheet is a back sheet.   The absorbent article has at least one fold line extending in the width direction in plan view, and the fold line overlaps with the wide slit portion in the first existence region in the thickness direction. The absorbent article as described in any one of Claims 1-6.   The absorbent article according to claim 7, wherein the fold line is a mountain fold fold line in which the skin facing surface side of the absorbent article is convex.

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