JP6509162B2 - Absorbent articles - Google Patents

Description

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

  Absorbent articles such as sanitary napkins, panty liners, incontinence pads, etc. are worn for a long time while being in contact with the crotch of the wearer, and therefore worn so as not to cause discomfort or discomfort to the wearer. Absorbent articles that are easily deformed (that is, excellent in fit) following the shape of the person's body have been considered.

  As such an absorbent article, for example, Patent Document 1 discloses an absorbent article provided with an absorbent layer, wherein the absorbent layer has a plurality of slits or a stretchable zone formed by local stretching. The absorbent article has been proposed. The absorbent article disclosed in Patent Document 1 is considered to be able to improve the body compatibility (i.e., the fit) of the absorbent article to the wearer.

Japanese Patent Application Publication No. 2007-523665

In the absorbent article disclosed in Patent Document 1, the extensibility zone is not disposed according to the operation mode of the wearer, and the extensibility zone is longitudinal from the front region in the longitudinal direction of the absorbent article. It is provided over the rear area. However, when the wearer carries out an operation such as walking, the absorbent article worn by the wearer alternately moves the buttocks of the wearer left and right alternately, in the longitudinal rear region corresponding to the buttocks of the wearer, Since a force is applied in the direction of twisting with the longitudinal direction of the absorbent article as the axis, when the extensibility zone is disposed as in the above-mentioned Patent Document 1, the force in the twisting direction in the rear region is the excretory opening of the wearer. To the area corresponding to (or in contact with), which deforms the area corresponding to the excretory opening, resulting in a decrease in the feeling of wearing or leakage of liquid excrement discharged from the wearer. There was a risk of
Also, as in the case of the absorbent article disclosed in Patent Document 1, when the absorbent article has a predetermined stretchability, the absorbent article is gripped by the rear region of the absorbent article worn by the wearer. The part holding the absorbent article in order to adjust the position of the absorbent article while stretching the absorbent article in the longitudinal direction (that is, pulling strongly in the longitudinal direction) when adjusting the position of the article In addition, there is a possibility that the force is concentrated in the vicinity thereof and the absorber is broken, and as a result, the absorption performance of the absorbent article is lowered.

  Therefore, the present invention can exhibit excellent wearing feeling and high absorption performance even if the wearer performs an operation such as walking, and the absorption is difficult to reduce even if the position adjustment is performed during wearing. It aims at providing a sexually transmitted article.

  The absorbent article according to one aspect (embodiment 1) of the present invention comprises a top sheet located on the skin facing surface side of the absorbent article, a back sheet located on the non-skin facing surface side of the absorbent article, and these respective sheets An absorbent article having a longitudinal direction, a width direction, and a thickness direction, and the absorbent article has an absorbent article in the longitudinal direction in a plan view. It has an excretion opening corresponding region corresponding to the wearer's excretion opening when worn, and a rear region located behind the same, and the absorbent body is in the width direction center extending in the longitudinal direction in the excretion opening corresponding region. A non-stretchable region extending across the axis, and in the rear region, at least a stretchable region that is stretchable in the longitudinal direction, and is adjacent to the rear of the stretchable region and extends across the width direction of the absorber The rear non-stretchable area The rear non-stretchable region comprises a compression unit for integrating the topsheet and the absorbent body, it is the absorbent article.

The absorbent article of this aspect 1 includes a non-stretchable area extending across the widthwise central axis extending in the longitudinal direction in the excretion opening corresponding area (that is, the excretion opening corresponding area of the absorbent article is deformed And a stretchable region which is stretchable at least in the longitudinal direction in the rear region (ie, the rear region of the absorbent article is likely to be stretched or curved along the longitudinal direction and the longitudinal axis is the longitudinal direction As it is configured to be easily deformed in the direction of twisting), the direction in which the absorbent article is twisted in the rear area by the wearer's buttocks moving alternately left and right when the wearer performs an operation such as walking State in which the back area adheres to the skin surface of the wearer by deforming in the above-mentioned twisting direction following the movement of the wearer even if a force is applied to the It can be maintained (i.e., it is possible to obtain an excellent wearing feeling). In addition, in the absorbent article of this aspect, since the force in the twisting direction described above is buffered by deformation of the rear region and becomes less likely to be transmitted to the excretion opening corresponding region, in the excretion opening corresponding region, the shape of the absorber Can be stably absorbed over a long period of time (that is, high absorption performance can be exhibited).
In the absorbent article of this aspect, the absorbent further includes a non-stretchable rear region adjacent to the rear of the stretchable region in the rear region and extending all over the width direction of the absorber; Absorbent article worn by the wearer due to including the pressing portion integrating the topsheet and the absorber (ie, the rear portion of the absorbent article is designed to have high rigidity) When the position of the absorbent article is adjusted by gripping the rear area of the absorbent article (hereinafter sometimes referred to simply as "during positional adjustment during wear"), the absorbent article is elongated in the longitudinal direction (ie, Even if the position of the absorbent article is adjusted while strongly pulling it in the longitudinal direction, the force applied to the absorbent in the portion gripped by the wearer and in the vicinity thereof is applied to the entire area in the width direction of the pressing portion and the absorbent Extending backward unstretched While dispersing in the entire width of the absorbent body by the region, the stretchable region of the absorber can be extended along the longitudinal direction. Thereby, in the absorbent article of this aspect, even if the position adjustment is performed during wearing, the absorber is not easily broken, and as a result, the absorption performance of the absorbent article is hardly deteriorated.
According to the above, the absorbent article of this embodiment can exhibit excellent wearing feeling and high absorption performance even when the wearer performs an operation such as walking, and also the absorption performance even if the position adjustment is performed during wearing Is less likely to decline.

  Moreover, in another aspect (aspect 2) of the present invention, in the absorbent article of the above-mentioned aspect 1, the rear non-stretching area is an area including an edge at the rear of the absorbent body.

  In the absorbent article of this aspect, since the above-mentioned rear non-stretchable area is an area including the rear side edge of the absorber, the wearer holds the above-mentioned rear non-stretch area at the time of position adjustment during wearing. And the above-mentioned effects (ie, the effect that the absorbent is difficult to break up and as a result, the absorption performance of the absorbent article is less likely to decrease). Can be demonstrated.

  Furthermore, in another aspect (aspect 3) of the present invention, in the absorbent article of the aspect 1 or 2, the squeezing portion is present across the stretchable region and the rear non-stretchable region.

  In the absorbent article of this aspect, since the compressed portion exists across the above-mentioned elastic region and the rear non-elastic region, the wearer holds the rear region of the absorbent article in the longitudinal direction while holding the elastic region. During pulling, the pulling force of the wearer is likely to be transmitted to the expansion and contraction region through the above-described squeezing portion. Thereby, the absorbent article of this embodiment can be positioned at a more precise position while extending the absorbent article in the longitudinal direction at the time of positional adjustment during wearing, and as a result, the wearing feeling is more excellent You can get

  Furthermore, in another aspect (aspect 4) of the present invention, in the absorbent article according to any one of the aspects 1 to 3, the squeezing portion has a plan view shape whose length in the width direction increases in the forward direction. There is.

  Since the absorbent article of this aspect has a plan view shape in which the length in the width direction increases in the forward direction, the wearer holds the absorbent article while gripping the rear region of the absorbent article. When pulling in the longitudinal direction, the force applied locally in the rear non-stretchable region (that is, the force applied to the absorbent body at the portion holding the absorbent article or the adjacent portion thereof) has the above-described specific planar view shape The squeeze part can be more reliably propagated forward while being dispersed in the width direction of the absorber. Thereby, in the absorbent article of this aspect, even when the position of the absorbent article is adjusted while strongly pulling the absorbent article in the longitudinal direction at the time of position adjustment during wearing, the absorbent body in the absorbent article It is even more difficult to break, and as a result, the absorption performance of the absorbent article is less likely to be further reduced.

  Furthermore, in another aspect (aspect 5) of the present invention, in the absorbent article according to any one of the aspects 1 to 4, the absorbent article is in the longitudinal direction and the width direction on the non-skin facing surface of the back sheet. It has the adhesion part arrangement | positioning area to extend, and the said pressing part exists behind the rear edge of the said adhesion part arrangement | positioning area in the said longitudinal direction.

  The absorbent article of the present embodiment is worn between the absorbent article and the undergarment to which the absorbent article is fixed, since the compressed part is located rearward of the rear edge of the adhesive part-arranged area in the longitudinal direction. The finger of the person is likely to enter (that is, the wearer is likely to hold the above-described pressing portion), and at least the pressing portion and its vicinity in the above-mentioned rear non-stretchable region are easy to move ( That is, the part held by the wearer and the vicinity thereof are easy to move). Thereby, the absorbent article of this aspect allows the wearer to grip the rear area of the absorbent article more reliably when adjusting the position during wearing, and the absorbent article is positioned at a more accurate position. It can be adjusted, and as a result, it is possible to obtain an even better feeling of wearing.

  Furthermore, in another aspect (aspect 6) of the present invention, in the absorbent article according to any one of the aspects 1 to 5, in the non-skin facing surface of the back sheet, the absorbent article is in the longitudinal direction and the width direction. The adhesive part disposition area is extended, and the adhesive strength in the adhesive part disposition area is smaller than the force required to elongate the absorbent article in the longitudinal direction by 30%.

  In the absorbent article of this embodiment, since the adhesive strength in the above-mentioned adhesive part arrangement region is smaller than the force required to elongate the absorbent article by 30% in the longitudinal direction, the absorbent article being worn by the wearer is elongated During position adjustment while strongly pulling in the direction (that is, while expanding the absorbent article by 30% or more), the absorbent article peels off from the undergarment, making it easy to adjust the position of the absorbent article. Thereby, the absorbent article of this aspect can acquire the further outstanding wearing feeling.

  Furthermore, in another aspect (aspect 7) of the present invention, in the absorbent article of the above-mentioned aspect 5 or 6, the widthwise length of the squeezed portion is larger than the widthwise length of the adhesive portion arrangement region.

  In the absorbent article of this aspect, since the widthwise length of the compressed part is larger than the widthwise length of the adhesive part-arranged area, the wearer holds the absorbent article in the longitudinal direction while gripping the rear area of the absorbent article. When pulling, the force applied locally in the above-mentioned rear non-stretchable region (that is, the force applied to the absorbent body at or near the portion holding the absorbent article) By the part, it can be made to propagate forward while being dispersed in the width direction of the absorber more reliably. Thereby, in the absorbent article of this aspect, even when the position of the absorbent article is adjusted while strongly pulling the absorbent article in the longitudinal direction at the time of position adjustment during wearing, the absorbent body in the absorbent article It is even more difficult to break, and as a result, the absorption performance of the absorbent article is more difficult to reduce.

  Furthermore, in another aspect (aspect 8) of the present invention, in the absorbent article according to any one of the aspects 1 to 7, the absorbent has a maximum widthwise length in the rear non-stretchable region.

  In the absorbent article of this aspect, since the absorbent has the maximum width direction length in the above-mentioned rear non-stretchable area, the wearer holds the absorbent article while holding the rear area of the absorbent article. When pulling in the longitudinal direction, the pulling force of the wearer can be more stably transmitted to the front stretch area through the full width of the rear non-stretch area having the maximum width direction length described above. Thereby, in the absorbent article of this aspect, even when the position of the absorbent article is adjusted while strongly pulling the absorbent article in the longitudinal direction at the time of position adjustment during wearing, the absorbent body in the absorbent article It is even more difficult to break, and as a result, the absorption performance of the absorbent article is more difficult to reduce.

  According to the present invention, it is possible to exhibit excellent wearing feeling and high absorption performance even when the wearer performs an operation such as walking, and also absorption that the absorption performance is unlikely to deteriorate even if the position adjustment is performed during wearing Sex articles can be provided.

FIG. 1 is a plan view of a sanitary napkin 1 according to an embodiment of the present invention in a developed state as viewed in the thickness direction from the top sheet side. FIG. 2: is the top view seen in the thickness direction from the back surface sheet side in the state which expand | deployed the sanitary napkin 1 which concerns on one Embodiment of this invention. Figure 3 is an end view of the longitudinal section of the sanitary napkin 1 according to one embodiment, along the widthwise central axis C _L extending in the longitudinal direction of the present invention. FIG. 4 is a plan view of the absorbent 22 used in the sanitary napkin 1 according to an embodiment of the present invention in a non-expanded state (natural state). FIG. 5: is a top view which shows typically the expansion | extension state of the absorber 22 used for the sanitary napkin 1 which concerns on one Embodiment of this invention. Figure 6 is an end view of a section of the extended state of the sanitary napkin 1 shown schematically, along the widthwise central axis C _L extending in the longitudinal direction L in accordance with an embodiment of the present invention. FIG. 7: is a schematic diagram for demonstrating the method to measure the adhesive force of the adhesion part arrangement | positioning area | region arrange | positioned at the non-skin opposing surface of a back surface sheet.

  Hereinafter, preferred embodiments of the absorbent article of the present invention will be described in detail with reference to the drawings. In the present specification, unless stated otherwise, “an object (for example, an absorbent article, an absorbent main body, an absorbent body, etc.) placed on a horizontal surface in an expanded state is Seeing in the thickness direction of an object is referred to as "plan view". In particular, in the case where the object is an absorbent article, looking in the thickness direction from the top sheet side in the developed state of the absorbent article may be simply referred to as "planar view".

About various directions etc. which are used in this specification, unless otherwise indicated, it is as follows.
In the present specification, “longitudinal direction” refers to “long direction of the length of the vertically elongated object in plan view”, and “width direction” indicates “short direction of the length of the vertically elongated object in plan view “Direction”, “thickness direction” refers to “perpendicular direction to the object placed on the horizontal plane in the unfolded state”. The longitudinal direction, the width direction and the thickness direction are orthogonal to each other.
Moreover, in the present specification, an “absorbent article one side that is relatively proximal to the abdomen of the wearer when the wearer wears the absorbent article in the longitudinal direction of the absorbent article” is referred to as “the absorbent article Front side of the absorbent article, "in the longitudinal direction of the absorbent article, relative to the abdomen of the wearer when the wearer wears the absorbent article (ie, against the back of the wearer The other side that is relatively proximal) is referred to as the “rear side of the absorbent article”. In the present specification, the front region and the rear region of the absorbent article refer to the front region and the rear region of the absorbent article, respectively.
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 of the "width direction relatively distal" with respect to the widthwise central axis C _L "
And, in the present specification, unless otherwise noted, “the proximal side relative to the skin surface of the wearer when wearing the absorbent article” in the thickness direction of the absorbent article is “skin facing surface It is called "side", and "the distal side relative to the skin surface of the wearer when wearing the absorbent article" is referred to as "non-skin facing surface side". In the present specification, the “skin facing surface side” and the “non-skin facing surface side” of various members (for example, top sheet, absorber, back sheet, stretch sheet, etc.) constituting the absorbent article The surfaces are simply referred to as "skin facing surface" and "non-skin facing surface", respectively.
In addition, in the present specification, “when worn” means (while worn) (while wearing the absorbent article from the time when the wearer wears the absorbent article (that is, when the usable state is formed)). Meaning “while wearing” is also synonymous.

FIG. 1 is a plan view of a sanitary napkin 1 (absorbent article) according to an embodiment of the present invention in a developed state as viewed in the thickness direction from the top sheet side, and FIG. It is the top view seen in the thickness direction from the back surface sheet side in the expanded state. Further, FIG. 3, the sanitary napkin 1 is an end view of a longitudinal section along the widthwise center axis C _L extending in the longitudinal direction. In FIGS. 1 to 3, 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.

  The sanitary napkin 1 which concerns on this embodiment has the longitudinally long external shape which has the longitudinal direction L and the width direction W in planar view, as shown to FIG. 1 and FIG. 2, and, specifically, A longitudinally long absorbent main body 2 having a longitudinal direction and a width direction, and a pair of substantially trapezoidal flaps extending outward in the width direction at a position near the front side of the central portion in the longitudinal direction of the absorbent main body 2 It is comprised by the part 3 and 3 '.

As shown in FIGS. 1 to 3, the absorbent main body 2 has a liquid-permeable surface sheet 21 located on the skin facing surface side in the thickness direction T, and a liquid impermeability located on the non-skin facing surface side. the backsheet 23, the absorbent body 22 having a plurality of slits S extending in the width direction W with positioned between the respective sheets, and the absorbent body 22 and backsheet 23 in the back region a ₃ of the sanitary napkin 1 And a plurality of adhesive portions disposed on the non-skin-facing surface of the back sheet 23 and extending continuously or intermittently in the width direction W. 9 and is configured such that liquid excrement such as menstrual blood and urine excreted from the wearer can be absorbed and held by the absorber 22 while permeating it in the thickness direction T. There is.
On the other hand, as shown in FIG. 1 and FIG. 2, the pair of flaps 3, 3 ′ is a surface sheet 21 extended outward in the width direction W from the absorbent main body 2 in the thickness direction T; A back sheet 23 extending outward from the absorbent body 2 in the width direction W, and an adhesive 4 for fixing clothes (underwear) disposed on the non-skin opposing surface of the back sheet 23 and extending in the longitudinal direction L; 4 'and.

When the sanitary napkin 1 is worn, the non-skin facing surface of the absorbent main body 2 is attached to the skin facing surface of the wearer's underwear via the adhesive section 9, and the pair of flaps 3 It is fixed to the undergarment by affixing 3 'to the non-skin facing surface of the undergarment via the adhesive portions 4 and 4' while folding back to the non-skin facing surface of the undergarment, respectively. Therefore, when the sanitary napkin 1 is worn, the non-skin facing surfaces of the pair of flaps 3 and 3 'are surfaces facing the skin surface of the wearer.
Here, the pressure-sensitive adhesive used for the pressure-sensitive adhesive portion 9 in the absorbent main body 2 and the pressure-sensitive adhesive portions 4 and 4 'in the flaps 3 and 3' for fixing the sanitary napkin 1 to the wearer's underwear respectively It is not particularly limited as long as it can fix the napkin 1 to the wearer's underwear, and, for example, any pressure-sensitive adhesive such as a styrene-based polymer can be used. In addition, since a pair of above-mentioned flap parts is not an essential component in this invention, the absorbent article of this invention does not need to have the said pair of flap parts.

In the sanitary napkin 1 according to the present embodiment, as shown in FIG. 1, the absorbent body 2 has a front end edge 5 in the longitudinal direction L located on the front side of the sanitary napkin 1 in plan view; And a rear end edge 6 in the longitudinal direction L located on the rear side of the sanitary napkin 1, and further, along the longitudinal direction L, the sanitary napkin 1 between the end edges 5, 6; the front region a ₁ located on the front side, a back region a ₃ located on the rear side of the sanitary napkin 1, and corresponding to the excretion area a ₂ located between these regions a _1, a _3, and Have.
In FIG. 1, the above-described regions A _{1 to} A ₃ are two virtual straight lines extending in the width direction W, that is, in the longitudinal direction L of the adhesive portions 4 and 4 ′ of the pair of flaps 3 and 3 ′. A first imaginary straight line L ₁ extending in the width direction W so as to include a pair of first ends 7, 7 ′ located on the front side in the longitudinal direction L of the both ends 7, 8, 7 ′, 8 ′ It extends in the width direction W so as to include a pair of second ends 8 and 8 'located on the rear side in the longitudinal direction L of both ends 7, 8 and 7' and 8 'in the longitudinal direction L of the portions 4 and 4'. a second virtual straight line L _2, are respectively divided by.

  Here, in the present specification, the “excretion port corresponding area” refers to an area facing or coming into contact with the excretory opening of the wearer when the absorbent article is worn, and the type and use of the absorbent article (specifically Is a region appropriately set for each type of absorbent article, depending on the type of liquid excrement such as urine, feces, menstrual blood, etc., the age, sex, etc. of the intended wearer. In addition, the position corresponding to the excretion opening is generally a position substantially in the center of the longitudinal direction of the absorbent article or near the front side (for example, when the absorbent article has an absorbent main body and a flap, absorption in plan view When the absorbent article has an absorbent main body portion having a narrow portion which is narrowed inward in the width direction at a substantially central portion in the longitudinal direction at a position on the front side overlapping in the width direction with the flap portion in the main body portion Is a position corresponding to the constricted portion in the absorbent main body in a plan view, and in the case where the absorbent article is composed of an oblong absorbent main body, the elongated in the width direction of the absorbent main body Longitudinal position of the overall length of the absorbent article and a width of approximately 1/3 or more of the overall length in the width direction of the absorbent article. Set to have a directional length For example, if the absorbent article of the napkin such as for night, the longitudinal length of the corresponding to the excretion area, also be set to be less than 1/3 of the entire longitudinal length of the absorbent article.

The sanitary napkin 1 according to this embodiment, as shown in FIGS. 1 and 3, located between the topsheet 21 and the backsheet 23 in the back region A ₃ described above, stretch in at least the longitudinal direction L comprises a stretchable sheet 24 having the sex, the absorber 22, in corresponding to the excretion area a ₂ of the above, the non-stretchable region N ₂ extending across the widthwise central axis C _L extending in the longitudinal direction L together comprising, in the rear area a _3, and stretchable region E _a that overlaps the longitudinal direction L and extend in the width direction W and stretchable sheet 24 in the thickness direction T, and adjacent to the rear of the expansion region E _a absorption wherein a rear non-stretchable region N ₃ extending in the entire width of the body 22, and further, the rear non-stretchable region N _3, as shown in FIGS. 1 and 3, the topsheet 21 and the absorber 22 including the compression section C _P to integrate Are configured as follows.

Sanitary napkin 1 according to this embodiment, the absorbent body 22 comprises a non-stretchable region N ₂ described above in corresponding to the excretion area A ₂ (i.e., configuration hardly deformed corresponding to the excretion area A ₂ of the sanitary napkin 1 is together with and) is, at least the longitudinal direction L is telescopic including stretchable region E _a (i.e., the back region a ₃ of the sanitary napkin 1 is stretchable or curved deformed along the longitudinal direction L in the rear area a ₃ (It is configured so as to be easily deformed in the direction of twisting about the longitudinal direction L)), so when the wearer performs an operation such as walking, the above-mentioned rear region is caused by alternately moving the buttocks of the wearer left and right even force is applied in the direction in which the sanitary napkin 1 is twisted in a _3, the stretchable region E _a in the back region a ₃ is following the movement of the wearer is deformed in a direction to twist the above More, it is possible to maintain a state where the back region A ₃ in close contact with the skin surface of the wearer (i.e., it is possible to obtain an excellent wearing feeling). In addition, the sanitary napkin 1 is to become difficult to direction of propagation of the forces twists the above is buffered by the deformation of the rear area A ₃ on the excretion corresponding region A ₂ described above, in the excretion portion corresponding region A ₂ The shape of the absorber 22 can be easily maintained, and liquid excrement discharged from the wearer can be stably absorbed over a long period of time (that is, high absorption performance can be exhibited).
Further, the sanitary napkin 1 comprises a rear non-stretchable region N ₃ where the absorber 22 extends in the entire region in the width direction of adjacent and absorber 22 in the back region A ₃ in the rear of the aforementioned flex region E _A, further , the rear non-stretchable region N ₃ contains a compression unit C _P to integrate topsheet 21 and the absorbent body 22 (i.e., as the rigidity of the rear portion is higher in the rear region a ₃ of the sanitary napkin 1 configured) for, when adjusting the position of the sanitary napkin 1 by gripping the rear area a ₃ of the sanitary napkin 1 during wear wearer, to extend the sanitary napkin 1 in the longitudinal direction L while (i.e., pulling strongly in the longitudinal direction L) the sanitary as the position of the napkin 1 is adjusted, partial and the compression portions C _P the force applied to the absorbent body 22 in the vicinity portion of the wearer is holding as well as While dispersing in the entire width of the absorbent body 22 by the rear non-stretchable region N ₃ extending in the entire width of the absorbent body 22, the stretchable region E _A of the absorber 22 can be extended along the longitudinal direction L . As a result, even if the sanitary napkin 1 is adjusted in position while being worn, the absorbent body 22 is unlikely to break up, and as a result, the absorption performance is less likely to decrease.
From the above, the sanitary napkin 1 according to the present embodiment can exhibit excellent wearing feeling and high absorption performance even when the wearer performs an operation such as walking, and also performs position adjustment during wearing. Also, it is difficult to reduce the absorption performance.

  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.

[Front sheet]
Topsheet 21 in a sanitary napkin 1 according to this embodiment, as shown in FIGS. 1 and 3, in the area (specifically ranging from the front region A ₁ of the sanitary napkin 1 in the rear area A _3, the longitudinal direction L is disposed on the skin-facing surface side in the thickness direction T in the region extending from the front edge 5 to the rear edge 6 of L, and is constituted by a liquid-permeable sheet member that can directly contact the skin surface of the wearer ing. The liquid permeable sheet member is not particularly limited as long as it has various properties (for example, liquid permeability, flexibility, touch, etc.) that can be used as a surface sheet of the absorbent article, for example, cellulose fibers and hydrophilic Nonwoven fabrics, such as spunlace non-woven fabrics and air-through non-woven fabrics, which are formed using hydrophilic fibers such as thermoplastic resin fibers which have been subjected to a chemical conversion treatment, can be used. Among them, it is preferable to use a liquid-permeable sheet member having elasticity or extensibility in at least one direction (direction corresponding to the longitudinal direction L of the absorbent article) for the surface sheet used for the absorbent article of the present invention. When such a liquid-permeable sheet member is used as the surface sheet, the absorbent article is more easily deformed in accordance with the movement of the wearer (that is, it becomes excellent in dynamic fit), and thus the absorbent article The wearing feeling of can be further improved.

  The liquid-permeable sheet member having the above-mentioned stretchability is not particularly limited as long as it has stretchability in at least one direction, and, for example, stretchability of a urethane resin spun bond non-woven fabric or the like subjected to a hydrophilization treatment Non-woven fabric; Laminated non-woven fabric having a concavo-convex structure in which a urethane resin spun bond non-woven fabric and air through non-woven fabric stretched in at least one direction are integrated by embossing or the like; Urethane resin or ethylene-vinyl acetate copolymer resin (EVA And the like, and a porous film or the like that has been subjected to a hydrophilization treatment and is made of an elastic resin such as

On the other hand, the liquid-permeable sheet member having the above-mentioned extensibility is not particularly limited as long as it has extensibility in at least one direction. For example, a non-woven fabric having a concavo-convex structure which can extend in one direction is preferable. It can be used. Such a concavo-convex structure, for example, extends in a second direction (for example, the width direction of the surface sheet) orthogonal to the first direction (for example, the longitudinal direction of the surface sheet) in which the nonwoven fabric extends in plan view A cross-sectional shape along the first direction, which includes a plurality of ridges arranged at predetermined intervals in the first direction and a plurality of grooves extending between the ridges and extending in the second direction. There may be mentioned a concavo-convex structure or the like in which is substantially a waveform or a zigzag shape. The above-mentioned ridges project from one side of the non-woven fabric in the thickness direction of the non-woven fabric (that is, when the non-woven fabric is used for the surface sheet, they project toward the skin-facing surface), Has a structure protruding from the other surface of the non-woven fabric in the thickness direction of the non-woven fabric (that is, recessed toward the non-skin facing surface side when the non-woven fabric is used for the surface sheet).
In the present invention, the structure that can be adopted as the above-mentioned one-sided expandable structure in the one direction is not limited to that of the above-mentioned embodiment, and is disclosed, for example, in Japanese Patent Nos. 5829349 and 5829326. A concavo-convex structure or the like constituted by a plurality of convex portions (ridge portions) and a groove portion having a plurality of concave portions can be suitably employed.

  The method for forming the stretchable uneven structure as described above on the liquid-permeable sheet member such as non-woven fabric is not particularly limited. For example, a method of continuously blowing a gas (for example, air or the like) to the fiber web or compression Arbitrary shaping methods, such as a shaping | molding method and a gear drawing method, are employable.

  In addition, the liquid-permeable sheet member having stretchability or extensibility that can be used as the surface sheet may have the above-described stretchability or extensibility in the entire area (entirely in plan view), but in the present invention It is preferable that a region including at least a region overlapping in a thickness direction with the elastic region of the absorber in the rear region has the above-mentioned elasticity or extensibility, and further, the elastic of the absorber in the rear region It is more preferable that only the area overlapping with the area in the thickness direction has the above-described stretchability or extensibility. When the topsheet has stretchability or extensibility only in such a specific area, the absorbent article has such a specific area (in particular, an area overlapping the stretch area of the absorbent with the thickness direction). Since it becomes easier to deform according to the movement of the wearer, it is possible to more reliably realize a state in which the region is in close contact with the skin surface of the wearer, while in the excretory-port corresponding region of the absorbent article, The force in the above-mentioned twisting direction applied to the rear area of the absorbent article is less likely to be transmitted, and the shape of the absorbent main body in the area corresponding to the excrement opening is further easily maintained. It can be absorbed stably.

The dimensions and shape of the surface sheet are not particularly limited as long as they can cover the skin-facing surface of the absorber, and any dimension and shape depending on the size, sex, use, etc. of the person to be worn the absorbent article It 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} , a liquid-permeable basis weight or within the range in view of the 20g / m ² ~50g / m ² flexibility is preferred. The basis weight can be measured in accordance with 5.2 of JIS L 1906.

  Furthermore, the thickness of the surface sheet is not particularly limited as long as the effects of the present invention are not impaired. For example, a thickness within the range of 0.001 mm to 5.0 mm can be adopted, but liquid permeability and flexibility From the point of view etc., the thickness in the range of 0.01 mm to 3.0 mm is preferable, and further, the thickness in the range of 0.1 mm to 1.0 mm is more preferable.

In addition, the thickness of sheet members, such as a surface sheet, can be obtained by the following measuring methods.
<Method of measuring thickness of sheet member>
(1) Cut out a sample sheet of a predetermined size (for example, 100 mm × 100 mm) from the sheet member to be measured.
(2) The cut out sample sheet is set in Kato Tech Co., Ltd.'s automated compression testing machine "KES FB-3A", and the thickness (mm) when the pressure on the sample sheet by the measurement terminal of the testing machine is 49 Pa The thickness (mm) is taken as the thickness of the sample sheet.

[Absorber]
Next, an absorbent which can be used for the absorbent article of the present invention will be described. FIG. 4 is a plan view of the non-elongated state (natural state) of the absorber 22 used for the sanitary napkin 1, and FIG. 5 is a plan view of the extended state of the absorber 22. 6 shows, the extended state of the sanitary napkin 1 shown schematically an end view of a cross section along the widthwise center axis C _L extending in the longitudinal direction L.

In the sanitary napkin 1 according to the present embodiment, as shown in FIG. 3, the absorbent body 22 is disposed between the top sheet 21 and the back sheet 23 in the thickness direction T and has been transmitted through the top sheet 21. It is an absorptive member which has a function which absorbs and holds a person's liquid excretion. As shown in FIG. 4, the absorber 22 has a longitudinally long external shape in which each end edge on the front side and the rear side in the longitudinal direction L protrudes in an arc shape on the front side and the rear side in plan view, respectively. as shown in FIG. 1, arranged in a central region including the widthwise center axis C _L extending in the longitudinal direction L of the sanitary napkin 1, so as to extend from the front region a ₁ described above over the back region a ₃ It is done.
In the present invention, the absorber is not limited to the above-mentioned embodiment, and the absorber may have an arbitrary outer shape such as, for example, a rectangular shape, an oval shape, an hourglass shape, or the like. It may be arranged to be biased forward or backward in the longitudinal direction of the article.

Then, in the present embodiment, as shown in FIG. 1, the absorbent body 22 has a width-direction central axis C _L extending in the longitudinal direction L in the front area A ₁ and the excretion opening corresponding area A ₂ in plan view. and has a front non-stretchable region N ₁ and a non-stretchable region N _2, in the back region a ₃ described above, the longitudinal direction L and the width direction W extending in and above the stretchable sheet 24 thickness which extends across It is configured to have a stretchable region E _a that overlaps the direction T.
Furthermore, the absorbent body 22 has in plan view, a rear non-stretchable region N ₃ extending in the entire width of the stretchable region E _A of the adjacent rearward and absorber 22 in the back region A ₃ above ing. When the absorber 22 has such a rear non-stretchable region N ₃ , the strength of the absorber 22 can be secured to a certain extent in the rear region A ₃ of the sanitary napkin 1. also wearer during justifications pulling strongly grip the rear area a ₃ of the sanitary napkin 1, the absorbent body 22 is unlikely to tear, it is possible to prevent a decrease in absorption performance of the sanitary napkin 1. Further, by such a rear non-stretchable region N ₃ extends the entire width of the absorbent body 22, when the positioning of the sanitary napkin 1, portions or the vicinity thereof the wearer is holding The force applied to the portion of the absorber 22 can be dispersed easily in the entire width direction of the absorber 22.

Here, the above-described non-stretchable regions in the absorbent body 22 (that is, the front non-stretchable region N ₁ in the front region A _1, the non-stretchable region N ₂ in the excretion opening corresponding region A ₂ and the rear non-stretchable region in the rear region A ₃ N _3), and more specifically described stretchable region _{E A.}

In the present embodiment, each non-stretchable region N _{1 to} N ₃ of the absorber 22 is not provided with a stretching means such as a plurality of slit portions described later, and has substantially no stretchability (ie, (Non-stretchable) area. In the present embodiment, as described above, the non-stretchable region extends across the width-direction central axis C _L extending in the longitudinal direction L in the front region A ₁ and the excretion opening corresponding region A ₂ in plan view. is provided as a front non-stretchable regions N ₁ and non-stretchable regions N _2, further, in yet rear side of the stretchable region E _a within the rear area a _3, in the entire region in the width direction of the absorbent body 22 (i.e., in FIG. 4 provided from the edge e ₁ of one side in the width direction W of the absorber 22 as a rear non-stretchable region N ₃ to the other side until the edge e ₂₎ extends. Incidentally, provided to forward non-stretchable regions N ₁ and the non-stretchable region N ₂ described above, continuous in 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) It is done.
In the absorbent article of the present invention, the arrangement of the non-stretchable region of the absorbent is not particularly limited as long as it is provided at least in the region adjacent to the rear of the stretchable region in the excretory opening corresponding region and the rear region. The stretchable area may not be provided in the front area, but it is preferable that the non-stretchable area be provided across the front area and the excretion opening corresponding area as in the above-described embodiment. If the non-stretchable area of the absorber is provided from the front area to the excretion opening corresponding area, the area of the absorber that is easy to maintain the shape (that is, difficult to deform) can be secured further widely. In the above-mentioned front area and excrement opening corresponding area relatively less affected by the movement of the wearer and the stretch of the underwear, etc., the liquid excrement discharged from the wearer is absorbed more stably and more reliably over a long period of time be able to.

  Furthermore, in the present invention, the rear non-stretchable area in the rear area is the area including the rear edge of the absorber (ie, the rear side longitudinal edge of the absorber) as in the embodiment described above. Is preferred. When the position of the absorbent article is adjusted such that the rear non-stretchable region is such a region, the wearer can easily grip the above-mentioned rear non-stretch region and the above-mentioned effect is exhibited by having the rear non-stretch region. The effect (i.e., the effect that the absorber is difficult to break up, and as a result, the absorption performance of the absorbent article is less likely to decrease) can be exhibited more reliably.

  As described above, in the present invention, although the outer shape of the absorber is not particularly limited in the present invention, it is preferable that the absorber have a maximum widthwise length in the rear non-stretchable region in the rear region described above. . When the absorbent body has the maximum width direction length in the above-mentioned rear non-stretch area, the wearer can pull the absorbent article in the longitudinal direction while gripping the rear area of the absorbent article. The absorber can be made more difficult to break because the pulling force of can be more stably propagated to the front stretchable area through the full width of the rear non-stretch area having the maximum width direction length described above. As a result, the absorption performance of the absorbent article is less likely to be further reduced.

Furthermore, in the sanitary napkin 1 according to the above-described embodiment, stretchable region E _A of the absorber 22, as shown in FIGS. 1, 3 and 4, the rear region overlapping the elastic sheet 24 in the thickness direction T in the a _3, it has a plurality of slits S extending in the width direction W as elastic means, such plurality of slits S is applied from the wearer (or take over a stretch underwear) external forces (Incidentally, the external force includes an external force of the external force and contraction direction of the extending direction.) and stretchable sheet by opening and closing by the contraction force applied from the 24, stretchable region E _a of the absorber 22 described above in at least the longitudinal direction L It can be expanded and contracted.
Absorber 22 and has such a stretchable region E _A within the rear area A ₃ which is a region corresponding to the buttocks of the wearer when worn, in cooperation with the elastic sheet 24 described above, the physiological since the back region a ₃ of use the napkin 1 (absorbent article) is liable to deform in the direction screw as easily and axis the longitudinal direction L and stretchable or warps in the longitudinal direction L, the wearer such as walking when performing an operation, even if force is applied in the direction in which the sanitary napkin 1 is twisted in the back region a ₃ above by the buttocks of the wearer moves to the right and left alternately, the absorber and the stretchable sheet 24 of the above by the stretchable region E _a 22 is deformed in a direction in which twists above and follow the movement of the wearer, to maintain the state where the back region a ₃ of the sanitary napkin 1 is in close contact with the skin surface of the wearer Can. In addition, the sanitary napkin 1, since the direction of the force twists the above is not easily propagated buffered by the deformation of the rear area A ₃ on the excretion corresponding regions A _2, in the excretion portion corresponding region A _2, The shape of the absorber 22 can be easily maintained, and liquid excrement discharged from the wearer can be stably absorbed over a long period of time.
In addition, when the absorbent that occupies most of the thickness of the absorbent main body in the absorbent article has a plurality of slits as described above, not only the absorbent but also the absorbent main body is flexible (in particular, thickness). Since it becomes what was excellent in the softness | flexibility in a direction and the width direction, the further outstanding physical compatibility (namely, fit property) as an absorbent article can be exhibited.

  Here, in the present specification, the “slit portion” means a score passing through the absorber in the thickness direction, and is orthogonal to the direction in which the slit portion extends (that is, the longitudinal direction of the slit portion) It has a direction (that is, the width direction of the slit portion). In the present embodiment, the longitudinal direction of the slit portion S is parallel to the width direction W of the sanitary napkin 1.

In the present embodiment, a plurality of slits S provided in the stretchable region E _A of the absorber 22, as shown in FIG. 4, in plan view, the slit portions S between the longitudinal direction L that is adjacent in the longitudinal direction L Are arranged so as to partially overlap (in other words, the slit portions S adjacent in the longitudinal direction L do not completely overlap in the longitudinal direction L). When the plurality of slits are arranged in this manner, the elastic region of the absorber formed by the plurality of slits absorbs when the above-mentioned twisting direction or longitudinal direction is deformed by the operation of the wearer or the like. It is less likely that the body will tear at the slit and shred in the longitudinal direction. In addition, in the absorber, a portion where the slit portion does not exist can exhibit predetermined absorption performance, and therefore, when such a portion is disposed without being unevenly distributed in the stretch region of the absorber, the stretch region Can also exhibit good absorption performance.

Further, in the present embodiment, a plurality of slits S in the stretchable region E _A of the absorber 22, as shown in FIG. 4, in the stretchable region E _A, slit portions present small that there are slits S of the predetermined number and the region a _S, are arranged so as to have a slit portion absence small area a _N of slits S are not present, the. Furthermore, as shown in FIG. 4, the slit portion non-existing small area _AN is one end (one end on the left side in FIG. 4) in the width direction W of the absorber 22 to the other end (the right side in FIG. A first non-existence small area _AN1 extending forward (upward in FIG. 4) toward the one end) and one end in the width direction W of the absorber 22 intersecting the first non-existence small area _AN1 4 and a second non-existence small area A _N2 extending rearward (downward in FIG. 4) from the one end on the left side in FIG. 4 toward the other end (one end on the right in FIG. _S is the area surrounded by the first absence small area a _N1 above the second absence small area a _N2, or second non-existence and the first absence small area a _N1 in the above small region a _N2 to the longitudinal extending direction L in the width direction edges e _1, e ₂ of the absorbent body 22 and It is disposed in an area surrounded by Te.

When a plurality of slit parts S are arranged in this manner, the absorber may be a slit part non-existence small area A _N extending in the specific two directions (that is, the first non-existence small area A _N1 and the second non-existence By having the small area A _N2 ), the strength and absorption performance as an absorber can be sufficiently ensured, and the slit area existence small area A _S surrounded by the slit area non-existence area A _N is provided. As a result, as shown in FIG. 5, the entire absorbent body 22 can be uniformly stretched, and the stretchable range can be made longer. As a result, even when the large operation or the like of the wearer, since the force applied to the absorbent body 22 can be sufficiently buffered, the more reliably the wearer the back region A ₃ while maintaining good absorption performance It can be adhered to the skin surface.

  In the absorbent article of the present invention, the arrangement form of the plurality of slits in the absorbent body is not limited to that of the above embodiment, and the plurality of slits described above may be, for example, slits in which a predetermined number of slits are present. The part existence small area may be disposed in the area surrounded by the slit part nonexistence existence small area provided in a grid pattern. The plurality of slits can be arranged in any pattern as long as the effects of the present invention are not impaired, but it is preferable to arrange the slits not to align in a straight line over the entire length in the width direction of the absorber. When the plurality of slits are arranged in this manner, it is possible to prevent the plurality of slits aligned in a straight line from acting like perforations of perforations and tearing of the absorber.

In the sanitary napkin 1 according to this embodiment, the absorber 22, as shown in FIG. 1, in corresponding to the excretion area A _2, the outer side in the width direction with respect to the non-stretchable region N ₂ above has a side slit portion existing region having a plurality of slits similar to the plurality of slits S in the rear region a ₃ and described above located in the absorber 22, the side slits existing region In at least the longitudinal direction L. Although such a configuration is not an essential configuration in the absorbent article of the present invention, if the absorber has such a side slit portion existing region as an extension region, the wearer's action such as walking causes Even in the case where the above-mentioned twisting direction force is transmitted from the rear region A ₃ or a force is applied in the width direction W of the absorbent article by the buttocks of the wearer, the above-mentioned side slit portion is present Since these forces can be buffered by the extension and deformation of the region, the non-stretchable region (that is, the non-stretchable region N ₂ in the above-mentioned embodiment) of the widthwise central portion in the excretion opening corresponding region of the absorber The shape is more easily maintained. As a result, it is possible to more stably absorb the liquid excrement discharged from the wearer in the above-described area corresponding to the excretion opening.

  Here, in the present specification, “elongation” means 5.0 N in two predetermined opposite directions of the object according to the method described in “6.3 Tensile strength and elongation” in JIS L 1913: 2010. 3% or more relative to the length (100%) of the natural state (ie, the state before stretching) without breaking when pulled by force (ie, the length after stretching is 103% or more) “Stretching” means “stretching” by pulling the object in two opposite predetermined directions with a predetermined force and stretching by 10% or more (ie, the length after stretching becomes 110% or more) And then contract by 7% or more when the force is released (that is, the length after contraction is the length of the object in the natural state (the state before elongation) (100%) Be 100% or more and 103% or less) means.

In the above embodiment, stretchable region E _A of the absorber 22 is applied from the wearer (or take over a stretch underwear) external forces (Note that this external force, the external force in the extending direction and the contraction direction of the external force And at least the longitudinal direction L can be expanded and contracted by opening and closing the plurality of slit portions S by contraction force applied from the stretchable sheet 24 or the like. The stretchable region of the absorber is not limited to those by the plurality of slits, and the stretchable region of the absorber is, for example, an optional stretchable material such as a part of the absorber made of a stretchable material. It can be formed by means.

In the present embodiment, slit portions S of the absorber 22 (i.e., the slits S formed stretchable region E _A and the side slit portions existence region of the absorbent body 22), as shown in FIG. 4, etc. In the present invention, the invention is not limited to such an embodiment, and the slit portion does not impair the effect of the present invention. As long as it can be formed in any plan view shape. As such a planar view shape, shapes, such as circular arc shape, V shape, a waveform, a zigzag shape, etc. are mentioned, for example.

  Furthermore, in the present invention, the longitudinal length (that is, the length in the direction in which the slit extends) of the slit portion of the absorber is not particularly limited, but is preferably in the range of 3 mm to 50 mm, more preferably It is in the range of 5 mm to 15 mm. When the length is 3 mm or more, the stretchable region of the absorber is more easily deformed in the above-mentioned twisting direction, and the above-described stretchable region can be sufficiently stretched in the longitudinal direction L, and further, the absorption The body can be moderately lowered in rigidity. In addition, when the length is 50 mm or less, when the absorber receives a force from the outer side in the width direction, for example, the slit portion is unlikely to be opened and torn, and as an absorber Good durability can be ensured.

  In addition, the means to form a several slit part in an absorber is not restrict | limited in particular, Arbitrary cutting means can be employ | adopted. For example, while conveying the absorber manufactured by any manufacturing method by a conveying means such as a belt conveyor, on the upper surface of the absorber, a plurality of rotating rollers provided in a predetermined arrangement pattern on the circumferential surface of the cutting roll. A plurality of slit portions as described above can be formed in the absorber by pressing the cutting blade to penetrate.

  In the absorbent article of the present invention, the absorbent is not particularly limited except that it has the above-described elastic and non-elastic regions (including the rear non-elastic region), and any known in the art. Absorbers can be used. As such an absorbent body, for example, one obtained by covering an absorbent material containing a water-absorbent fiber such as pulp and / or a superabsorbent polymer with at least one liquid-permeable covering sheet such as a tissue can be mentioned. .

  The thickness of the absorber is not particularly limited as long as the effects of the present invention are not impaired. For example, a thickness within the range of 0.1 mm to 10 mm can be employed, but the stretchability, absorbability, flexibility, etc. A thickness within the range of 0.3 mm to 3 mm is preferred from the point of.

[Stretch sheet]
In the sanitary napkin 1 according to the present embodiment, as shown in FIGS. 1 and 3, the stretchable sheet 24 which can be stretched at least in the longitudinal direction L is a rear area A which is an area corresponding to the buttocks of the wearer when worn. ₃ is disposed between the absorber 22 and the back sheet 23 (ie, on the non-skin facing surface side of the absorber 22), and the rear region A _{3 of the} sanitary napkin 1 (more specifically, the rear region A within _3, a stretchable sheet member for imparting elasticity to a region) corresponding to the stretchable region E _a of the absorber 22. Incidentally, stretchable sheet 24, as described above, is disposed at a position overlapping the stretchable region E _A and the thickness direction T in the back region A ₃ of the absorbent body 22 do not overlap in the stretchable region E _A and the thickness direction T It is not arranged in the part. When the stretchable sheet 24 is thus arranged in the back region A _3, while ensuring the stretchability in the back region A _3, stretching to the back region A ₃ of the sanitary napkin 1 in the longitudinal direction L The structure can be easily bent and deformed in the direction of twisting about the longitudinal direction L, and the above-described effects exerted by the structure can be more reliably exhibited.

  The above-mentioned stretchable sheet is not particularly limited as long as it is a stretchable sheet member capable of stretching in at least one direction (direction corresponding to the longitudinal direction L of the absorbent article), for example, thermoplastics such as urethane resin and polyolefin resin A stretchable film formed of a resin; an elastic film formed of a polyester resin, or the like can be used.

  Moreover, in the absorbent article, the position in the thickness direction at which the above-mentioned stretchable sheet is disposed is not particularly limited as long as it is between the top sheet and the back sheet, and the absorber and the back sheet as in the above embodiment The elastic sheet may be disposed between the top sheet and the absorbent body, but in view of the fact that a predetermined absorption performance can be obtained also in the rear region of the absorbent article, It is preferable to arrange | position between an absorber and a back surface sheet like the above-mentioned embodiment.

  In the present invention, the above-mentioned stretchable sheet is not an essential component as long as the stretchable area of the absorbent body is configured to be stretchable, and therefore the absorbent article of the present invention is the stretchable sheet. It is not necessary to have it.

[Back sheet]
Backsheet 23 in the sanitary napkin 1 according to this embodiment, as shown in FIGS. 1 to 3, in the area (specifically ranging from the front region A ₁ of the sanitary napkin 1 in the rear area A _3, the longitudinal direction L) is disposed on the non-skin facing surface side in the thickness direction T in the area extending from the front edge 5 to the rear edge 6 of L, and leaks of liquid excrement such as menstrual blood and urine discharged from the wearer It is comprised by the liquid impervious sheet member which prevents. Such a liquid impermeable sheet member is not particularly limited as long as it has various properties (such as liquid impermeability, air permeability, flexibility, etc.) that can be used as a back sheet of the absorbent article, for example, it has air permeability A well-known liquid-impermeable sheet member such as a resin film such as polyethylene or polypropylene, or a laminate obtained by laminating a nonwoven fabric to the resin film can be used. Among such liquid-impervious sheet members, the back sheet used for the absorbent article of the present invention is a liquid-impervious or extensible liquid in at least one direction (direction corresponding to the longitudinal direction L of the absorbent article). It is preferable to use a permeable sheet member. When the liquid impermeable sheet member having such stretchability or extensibility as the back sheet is used, the absorbent article is more easily deformed in accordance with the movement of the wearer (that is, the dynamic fit property is excellent) Thus, the wearing feeling of the absorbent article can be further improved.

  The above-described stretchable liquid impermeable sheet member is not particularly limited as long as it has stretchability in at least one direction. For example, the stretchable sheet member similar to the above-described stretchable sheet is preferably used. It can be used. Moreover, the liquid impermeable sheet member having the above-mentioned extensibility is not particularly limited as long as it has extensibility in at least one direction, and for example, a thermoplastic resin sheet having a bellows structure which can be extended in one direction A member etc. can be used suitably.

In this embodiment, the backsheet 23, as shown in FIGS. 2 and 3, the liquid-impermeable sheet member having a longitudinal direction L in extendable bellows structure B in the rear area A ₃ of the sanitary napkin 1 It is configured. As shown in FIGS. 2 and 3, the above-described bellows structure B extends in the width direction W of the sanitary napkin 1 and is lined up at predetermined intervals in the longitudinal direction L in plan view. _1, is constituted by a plurality of straight grooves B ₂ extending linearly in the convex portion position is and the width direction W between the B ₁ adjacent, substantially the cross-sectional shape along the longitudinal direction L It has a zigzag shape. Incidentally, the linear-shaped convex portion B ₁ of the above, as shown in FIG. 3 has a protruding skin-facing surface side structure in the thickness direction of the backsheet 23, a linear groove portion B ₂ described above, In the thickness direction of the back sheet 23, it has a structure depressed to the non-skin opposing surface side.

As described above, when the back sheet 23 has the bellows structure B extendable in the longitudinal direction L in the rear region A ₃ , the bellows structure B can more reliably obtain stretchability in the longitudinal direction L in the rear region A ₃ . it is possible, it is possible to obtain a state in which the rear region a ₃ are in close contact with the skin surface of the wearer more reliably, the direction of the force twists the above applied to the back region a ₃ are adjacent excretion hardly propagated to the corresponding region a _2.

In addition, in the case of the above-mentioned embodiment in which a plurality of slit parts S are formed in absorber 22, usually, the liquid excrement discharged from the wearer reaches back sheet 23 via slit parts S. When the back sheet 23 has the above-described bellows structure B, the liquid excrement that has reached the back sheet 23 is diffused in the width direction W along the groove B ₂ in the bellows structure B. Thus, it can be absorbed from a wide range of points on the non-skin facing surface of the absorber 22.

  Furthermore, when the back sheet has such a bellows structure, flexibility, cushioning properties, etc. can be imparted in the thickness direction of the absorbent article, so that the wearing feeling of the absorbent article is further improved. be able to. In addition, when the back sheet that is easily visible to the wearer has such a bellows structure, the wearer can find that the absorbent article of the present invention is a product that is particularly excellent in stretchability, fit, flexibility, etc. It also has the advantage of being easy to recognize.

  In the above-described bellows structure, the height of the convex portion (that is, the distance between the horizontal surface including the top of the convex portion and the horizontal surface including the bottom (the deepest portion) of the groove) does not impair the effects of the present invention. The height is not particularly limited, and for example, a height within the range of 0.1 mm to 1.2 mm can be adopted, but 0.2 mm to 1.0 mm is preferable in terms of extensibility, cushioning property, and liquid diffusibility. The height within the range is preferred, and further, the height within the range of 0.4 mm to 0.8 mm is more preferred.

  Furthermore, the pitch of the above-described bellows structure (that is, the distance (mm) between the top centers (ridge lines) of two adjacent convex portions) is not particularly limited, and for example, the range of 0.5 mm to 5.0 mm Although an inner pitch can be adopted, a pitch within the range of 1.0 mm to 4.0 mm is preferable in terms of extensibility, cushioning properties, diffusivity of liquid, and the like. In addition, the pitch of this bellows structure may be measured as the interval (mm) between the top centers (ridge lines) of two adjacent convex portions based on the planar photograph or the planar image of the back sheet in the pressureless state. it can.

  In the present invention, the structure that can be adopted as the bellows structure of the back sheet is not limited to the above-described embodiment, and for example, the projections and grooves in the above-described bellows structure at least partially have a direction in plan view. It is possible to adopt an aspect of extending while changing (for example, in the form of a wave or zigzag), an aspect in which an interval between two at least partially adjacent convex portions is not constant, or the like.

  The method for forming the above-described bellows structure on the liquid impermeable sheet member used for the back sheet is not particularly limited, and any shaping method such as compression molding method, vacuum molding method, gear drawing method, etc. may be used. It can be adopted.

  In addition, the above-mentioned stretchable or extensible liquid impermeable sheet member that can be used as a back sheet may have the above-described stretchability or stretchability in the entire area (entirely in plan view), It is preferable that only the region including the region overlapping in the thickness direction with the elastic region of the absorber in the rear region has the above-described elasticity or extensibility, and further, the elastic region of the absorber in the rear region It is preferable that only the region overlapping in the thickness direction has the above-described stretchability or extensibility. When the back sheet has stretchability or extensibility only in such a specific area, the absorbent article (specifically, the absorbent main body portion) has such a specific area (in particular, the stretchable area of the absorbent). And in the area overlapping in the thickness direction), it becomes easier to deform according to the movement of the wearer, so that the state where the area is in close contact with the skin surface of the wearer can be realized more reliably, while the absorption The force in the above-mentioned twisting direction applied to the rear area is difficult to be transmitted in the excretion opening corresponding area of the sexual article, and the shape of the absorbent main body in the excretion opening corresponding area is further easily maintained. Liquid excrement can be absorbed more stably.

  In the present invention, the size and shape of the back sheet are not particularly limited as long as they can prevent the leakage of liquid excrement discharged from the wearer, and the size, sex, use and the like of the absorbent article Any size and shape can be adopted accordingly. Further, the thickness of the back sheet is not particularly limited as long as the effects of the present invention are not impaired. For example, a thickness within the range of 0.001 mm to 5.0 mm can be adopted, but the liquid impermeability and softness The thickness within the range of 0.003 mm to 3.0 mm is preferable from the viewpoints of permeability, air permeability and the like, and the thickness within the range of 0.01 mm to 1.0 mm is more preferable.

  In the sanitary napkin 1 according to this embodiment, the top sheet 21 and the back sheet 23 sandwich a laminate of the absorbent body 22 and the elastic sheet 24 joined to the absorbent body 22, The outer peripheral edge of each sheet is joined by a hot melt adhesive. The means for such bonding is not particularly limited, and any bonding means such as heat sealing method and ultrasonic bonding method may be employed in addition to the above-mentioned adhesive, but the above-mentioned stretchability and extensibility Hot melt type such as styrene-isoprene-styrene block copolymer (SIS), styrene-butadiene-styrene block copolymer (SBS), styrene-ethylene-butylene-ethylene copolymer (SEBS) from the viewpoint of being hard to inhibit It is preferred to use an adhesive.

[Pressing department]
Sanitary napkin 1 according to this embodiment, as shown in FIGS. 1 and 3, in the rear non-stretchable region N ₃ in the back region A _3, compressing portions C to integrate at least the topsheet 21 and the absorber 22 _It has _P. In this embodiment, compression unit C _P, as shown in FIG. 1, compression portions of the plurality of dot-like are arranged side by side so as to form the pattern. Such compression portions C _P constitutes the absorbent body unit 2, the topsheet 21, the absorbent body 22, the stretchable sheet 24 and the laminated body formed by joining the backsheet 23 stacked in this order, heating or non-heating emboss using the processing means, from the skin-facing surface of the topsheet 21 in the thickness direction T (toward the non-skin-facing surface side) is formed by compressing, the topsheet 21 at the bottom of the squeeze portion C _P, Absorber 22, elastic sheet 24 and back sheet 23 are integrated. Thus, the bottom of such a compressing portion C _P is relatively density is higher than other portions.

The absorbent article includes a squeeze unit integrating such at least the surface sheet and the absorbent in the rear non-stretch area in the rear area described above (ie, the rigidity of the rear portion in the rear area of the absorbent article) And the wearer stretches the absorbent article in the longitudinal direction when holding the rear area of the absorbent article worn by the wearer and adjusting the position of the absorbent article. Even if the position of the absorbent article is adjusted (that is, while strongly pulling it in the longitudinal direction), the force applied to the absorbent at the portion gripped by the wearer and the vicinity thereof is in the width direction of the pressing portion and the absorbent Since the stretchable area of the absorber can be extended along the longitudinal direction while being dispersed over the entire width direction of the absorber by the rear non-stretchable area extending over the entire area, position adjustment is performed while wearing the absorbent article Even absorber hardly to tear, absorbing performance of the resulting absorbent article is hardly lowered.
In addition, since such an effect is exhibited if a pressing part integrates at least a surface sheet and an absorber, a pressing part is a surface sheet, an absorber, and expansion-contraction like the above-mentioned embodiment. It is not necessary that all of the sexing sheet and the back sheet be integrated.

Furthermore, in the sanitary napkin 1 according to this embodiment, compression portions C _P of the above, as shown in FIG. 1, in plan view, is disposed astride the stretchable region and a rear non-stretchable region of the absorber There is. Such arrangement of the squeeze part is not an essential component in the absorbent article of the present invention, but when the squeeze part is arranged across the above-mentioned elastic region and rear non-elastic region, it is worn. When the wearer pulls the absorbent article in the longitudinal direction while grasping the rear area of the absorbent article, the pulling force of the wearer is likely to be transmitted to the stretchable area via the above-described pressing part, so the absorbent article At the time of position adjustment, while the absorbent article is elongated in the longitudinal direction, the position can be adjusted to a more accurate position, and as a result, a better feeling of wearing can be obtained.

  In the present invention, the plan view shape of the squeezed portion is not particularly limited, and in addition to the shape (see FIG. 1) exhibiting a predetermined pattern as in the embodiment described above, linear, wavy, zigzag, geometric shape Any shape such as, etc. may be adopted, but the pressing part has a plan view shape in which the length in the width direction becomes larger toward the front of the absorbent article (for example, triangular shape with the base located on the front side, It is preferable to have a heart shape etc. that tapers to the side. When the squeeze part has such a planar view shape, when the wearer pulls the absorbent article in the longitudinal direction while grasping the rear area of the absorbent article, it locally occurs in the above-mentioned rear non-stretchable area. Force applied to the absorbent article (that is, the force applied to the absorbent in the portion holding the absorbent article and in the vicinity thereof), more reliably in the width direction of the absorbent by the squeezing portion having the above-described specific plan view shape Since it can be made to propagate forward while dispersing, even if the position of the absorbent article is adjusted while strongly pulling the absorbent article in the longitudinal direction when adjusting the position of the absorbent article, absorption in the absorbent article The body is even more difficult to break, and as a result, the absorption performance of the absorbent article is less likely to be further reduced.

Further, in the embodiment described above, compression portions C _P is, in plan view, are disposed so that the plan view shape symmetrical with respect to the width direction central axis C _L extending in the longitudinal direction L, the not limited to such an embodiment is the invention, compression unit, for example, it may be arranged offset to one side of the widthwise central axis C _L, or only either one side of the widthwise central axis C _L It may be arranged in Further, in the embodiment described above, compression portions C _P is compression portions of the plurality of dot-like are arranged side by side so as to form the pattern, in the present invention, compression portions of the above, linear and The curved squeezing portions may be disposed singly or in any combination, and further, plural types of patterns may be disposed in combination. The larger the planar view area of the pressing part, the more difficult it is for the absorbent in the absorbent article to break up.

Incidentally, the sanitary napkin 1 according to this embodiment, in addition to the compression portions C _P described above, in plan view, in the non-stretchable region N ₂ for at least corresponding to the excretion area A _2, the width direction and extending in the longitudinal direction L two pressing groove P extending in the longitudinal direction L positioned on both sides and the absorbent main body 2 of the central axis C _L, and a P '(see Figure 1). Such squeezing groove P, P ', like the compression portions C _P of the above, constituting the absorbent body unit 2, the topsheet 21, the absorbent body 22, the elastic sheet 24 and the backsheet 23 are joined superposed in this order The laminated body is formed by squeezing in the thickness direction T (toward the non-skin facing surface side) from the surface on the skin facing surface side of the top sheet 21 using heated or non-heated embossing means The top sheet 21, the absorber 22 and the back sheet 23 are integrated at the bottom of the pressing groove P, P '. Therefore, the bottoms of the pressing grooves P, P 'have a relatively higher density than the other portions. Incidentally, compressed groove P described above in this embodiment, P ', as shown in FIG. 1, but extending across the front area A ₁ to the back region A _3, the thickness and the elastic sheet 24 described above is It does not overlap in the direction T.

  Although provision of such two pressing groove portions is not an essential constituent requirement in the absorbent article of the present invention, if the absorbent article is provided with such pressing groove portions, it is possible to operate by the wearer's action etc. Even in the case where a force in the above-mentioned twisting direction is applied to the rear region of the absorbent article or a force is applied in the width direction of the absorbent main body by the buttocks of the wearer, In the region to be a part (that is, the region sandwiched in the width direction by the two pressing groove portions), the rigidity of the pressing groove portion makes it easier to maintain the shape of the absorbing main portion, so the liquid excreted from the wearer is excreted It is possible to absorb things more stably and steadily.

The plan view shape of the compressed groove portion is not particularly limited as long as the effects of the present invention are not impaired, and in addition to the shape combining curves as in the embodiment described above (see FIG. 1), linear, broken, zigzag Arbitrary shapes, such as geometric shape and predetermined design shape (flower pattern etc.), can be adopted. Moreover, squeezing the groove, as in the embodiment described above, in plan view, may be arranged one on each side of the widthwise central axis C _L extending in the longitudinal direction L, but the widthwise center axis C _L Two or more may be arranged on each side of. When a plurality of compression grooves are arranged in this manner, the rigidity of the absorbent main body is enhanced, and the shape of the absorbent main body is more easily maintained.

[Adhesive part]
In the sanitary napkin 1 according to the present embodiment, the plurality of adhesive portions 9 disposed on the non-skin facing surface of the back sheet 23 and extending continuously or intermittently in the width direction W are, as shown in FIG. Plural adhesive lines 9 extending in the width direction W and non-adhesive areas 10 extending in the width direction W are alternately arranged along the longitudinal direction L so that a plurality of lines are arranged at predetermined intervals in the direction L. They are arranged in a stripe shape, and together with the non-adhesive portions 10 existing between the adhesive portions 9 adjacent to each other in the longitudinal direction L, constitute an adhesive portion arranging area 11 for fixing clothes (underwear). The adhesive portion disposition area 11 fixes the non-skin facing surface of the absorbent main body 2 to the skin facing surface of the clothes (underwear) of the wearer when the wearer wears the sanitary napkin 1. In addition, the arrangement form of the above-mentioned adhesion part is not particularly limited as long as the effect of the present invention is not impaired, and the adhesion part is arranged in any form such as spiral shape, intermittent shape or dot shape besides the above stripe shape. can do.

  In the present invention, the arrangement position of the above-mentioned adhesion part arrangement area is not particularly limited, and the adhesion part arrangement area is arranged so as to overlap in the thickness direction with the pressing part in the rear non-stretchable area in the above-mentioned rear area. May be disposed so as not to overlap with the pressing portion in the thickness direction (that is, the pressing portion is located rearward of the rear edge of the adhesive portion disposition area in the longitudinal direction of the absorbent article). It may be When the adhesive part disposition area is disposed as in the latter case, the finger of the wearer can easily enter between the absorbent article and the underwear to which the absorbent article is fixed (that is, the above-mentioned pressing part by the wearer) Of the absorbent article, and at least the squeezed portion and its vicinity in the above-mentioned rear non-stretchable region become easy to move (that is, the portion to be held by the wearer and its vicinity become easy to move). While adjusting the position, the wearer can hold the rear area of the absorbent article more reliably, and can adjust the absorbent article to a more precise position, resulting in a further excellent feeling of wearing You can get

  Further, in the present invention, it is preferable that the above-mentioned adhesive part arranging area has an adhesive force smaller than the force required to elongate the absorbent article by 30% in the longitudinal direction. If the adhesive strength in the adhesive portion arrangement area is smaller than the force required to elongate the absorbent article by 30% in the longitudinal direction, the absorbent article being worn by the wearer is strongly pulled in the longitudinal direction (ie, absorption) The absorbent article peels off from the undergarment during positioning of the elastic article while extending 30% or more), which makes it easier to adjust the position of the absorbent article, and as a result, it is possible to obtain an even better feeling of wearing it can.

  Here, the force required to elongate the absorbent article by 30% in the longitudinal direction can be measured according to the method described in “6.3 Tensile Strength and Elongation” of JIS L 1913: 2010, and The adhesive force of the adhesive part arrangement area disposed on the non-skin facing surface of the back sheet can be measured according to the following measurement method. In addition, FIG. 7 is a schematic diagram for demonstrating the method to measure the adhesive force of the adhesion part arrangement | positioning area | region arrange | positioned at the non-skin opposing surface of a back surface sheet.

<Measurement of adhesive strength>
(1) Peel off the top sheet, the absorber and the like from the absorbent article, and take out the back sheet having the adhesive. At this time, the adhesive, the tissue and the like adhering to the skin-facing surface (that is, the surface on the side of the absorber) of the back sheet are removed using a cotton swab or the like impregnated with ethanol.
(2) A rectangular shape whose size is larger than the area where the adhesive is placed (that is, the area where the adhesive portion is arranged) and which can be held by the chuck of the constant-speed extension tester To obtain a back sheet sample 23 'as shown in FIG.
(3) The test coated fabric (Kanakin No. 3) is cut into a size of 70 mm wide and 80 mm long to obtain a test coated sheet 12 as shown in FIG. In addition, the size of the test adhesion sheet 12 can be appropriately changed according to the size of the back sheet sample 23 'described above.
(4) After disposing the back sheet sample 23 'on the upper surface of the test adherend sheet 12 so that the surface having the adhesive (adhesive portion 9) is on the lower side, a 2 kg roller is applied once in one direction The laminate sample 13 is obtained by bonding the two together. When the back sheet sample 23 'is disposed on the upper surface of the test adherend sheet 12, as shown in FIG. 7, the area (adhesive portion disposed area 11) in which the adhesive of the back sheet sample 23' is disposed is All are covered by the test adhesion sheet 12, and one end in the longitudinal direction of each of the test adhesion sheet 12 and the back sheet sample 23 'extends in the longitudinal direction by at least 15 mm from the overlapping portion of the two. The test adherend sheet 12 and the back sheet sample 23 'are arranged to be shifted in the longitudinal direction so as to be ejected. Moreover, the speed at the time of bonding is 300 mm / min.
(5) The laminate sample 13 of the test adhesion sheet 12 and back sheet sample 23 'thus obtained is left to stand for 30 minutes under a constant temperature and humidity atmosphere of 20 ° C. and 60% RH.
(6) A test coated sheet extending in opposite longitudinal directions from both end portions of the laminate sample 13 in the longitudinal direction (that is, from overlapping portions of the test coated sheet 12 and the back sheet sample 23 ′) After holding each of 12 and one end in the longitudinal direction of each of the back sheet samples 23 ′) with a chuck of a constant-speed tensile tester, the laminate sample 13 is, as shown in FIG. Pull in the two opposite directions A and A 'in the longitudinal direction of the sample 13 to peel off the test adherend sheet 12 and back sheet sample 23' described above, and measure the peel strength (maximum value cN) at that time. . In addition, as for the tension test conditions of a constant-velocity extension tension tester, the distance between chucks is 60 mm, and the tension speed is 500 mm / min.
(7) The measurement of the above-mentioned peel strength is performed 5 times, and let the average value be the adhesive strength (cN) of the adhesion part arrangement field arranged on the non-skin opposite side of a back sheet.

  Further, in the present invention, the size or area of the above-mentioned adhesive part arranging area is not particularly limited as long as the effect of the present invention is not impaired, and any size or area can be adopted. It has a width direction length smaller than the pressing part in the rear non-stretching area in the above-mentioned rear area (that is, the width direction length of the above-mentioned pressing part is larger than the width direction length of the adhesion part arranging area Is preferred. If the width direction length of the adhesive portion arrangement region is smaller than the width direction length of the above-mentioned compressed portion (that is, the above-mentioned width direction length is larger than the width direction length of the adhesive portion arrangement region) When pulling the absorbent article in the longitudinal direction while gripping the rear area of the article, the force locally applied in the above-mentioned rear non-stretching area (that is, the absorption of the part holding the absorbent article or the vicinity thereof Since the force applied to the body can be transmitted forward while being dispersed in the width direction of the absorber more reliably by the above-mentioned large-sized pressing portion in the width direction, when adjusting the position of the absorbent article Even if the position of the absorbent article is adjusted while strongly pulling the absorbent article in the longitudinal direction, the absorbent in the absorbent article is more difficult to tear, and as a result, the absorbent performance of the absorbent article is further reduced. It becomes difficult.

In addition, the absorbent article of this invention can be suitably combined, changed, etc. in the range which does not deviate from the objective of this invention, and the meaning, without being limited to the above-mentioned embodiment and illustrative description.
Furthermore, the present invention can be applied to various absorbent articles such as, for example, panty liners and (light) incontinence pads, in addition to the sanitary napkin of the above-described embodiment. In the present specification, ordinal numbers such as "first" and "second" are used to distinguish the items to which the ordinal numbers are attached, and mean the order, priority, importance, etc. of each item. It is not something to do.

1 Sanitary napkin (absorbent article)
DESCRIPTION OF SYMBOLS 2 Absorbing main-body part 21 Front sheet 22 Absorbing body 23 Backing sheet 24 Stretchable sheet 3, 3 'flap part 4, 4' Adhesive part 5 Front edge part 6 Rear edge part 9 Adhesive part 10 Non-adhesive part 11 Adhesive part arrangement Region A ₁ Forward region A ₂ Excrete corresponding region A ₃ Rear region C _P Pressed part E _A Stretchable region N ₁ Forward non-stretchable region N ₂ Non-stretchable region N ₃ Rear non-stretchable region S Slit portion

Claims (9)

Longitudinal direction, width comprising a front sheet located on the skin-facing surface side of the absorbent article, a back sheet located on the non-skin-facing surface side of the absorbent article, and an absorber located between these respective sheets An absorbent article having a direction and a thickness direction,
The absorbent article is, in plan view, in the longitudinal direction,
It has an excretion opening corresponding area corresponding to the wearer's excretion opening when the absorbent article is worn, and a rear area located behind the same.
The absorbent body includes a non-stretchable region extending across the widthwise central axis extending in the longitudinal direction in the outlet corresponding region, and a stretchable region that is stretchable in the longitudinal direction at least in the rear region And a rear non-stretchable region adjacent to the rear of the stretchable region and extending all over the width direction of the absorbent body,
The rear non-stretchable region includes a pressing portion that integrates the surface sheet and the absorber.
Said absorbent article.   The absorbent article according to claim 1, wherein the rear non-stretchable area is an area including an edge at the rear of the absorbent body.   The absorbent article according to claim 1, wherein the squeezing portion is present across the stretchable region and the rear non-stretchable region.   The absorbent article according to any one of claims 1 to 3, wherein the squeezing portion has a plan view shape in which a length in the width direction increases as it goes forward. The absorbent article has an adhesion part disposition area extending in the longitudinal direction and the width direction on the non-skin facing surface of the back sheet.
The absorbent article according to any one of claims 1 to 4, wherein the squeezing portion is present rearward of the rear end edge of the adhesive portion disposition area in the longitudinal direction. The absorbent article has an adhesion part disposition area extending in the longitudinal direction and the width direction on the non-skin facing surface of the back sheet.
The adhesive force in the said adhesion part arrangement | positioning area | region is an absorbent article as described in any one of Claims 1-5 smaller than the force required to extend the said absorbent article in the said longitudinal direction 30%.   The absorptive article according to claim 5 or 6 whose width direction length of said pressing part is larger than width direction length of said adhesion part arrangement field.   The absorbent article according to any one of claims 1 to 7, wherein the absorbent has a maximum widthwise length in the rear non-stretchable region. A stretchable sheet which is disposed between the front sheet and the backsheet and which is stretchable at least in the longitudinal direction, in a region corresponding to the stretchable region of the rear region;
  The top sheet, the absorber, and the back surface are disposed on both sides of the central axis in the width direction and extend in the longitudinal direction at least in the non-stretchable region of the discharge port corresponding region. And further comprising two compressed grooves for integrating the sheet.
The absorbent article according to any one of claims 1 to 8, wherein the two compressed groove portions do not overlap with the stretchable sheet in the thickness direction.

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