WO2017115540A1

WO2017115540A1 - Absorbent article

Info

Publication number: WO2017115540A1
Application number: PCT/JP2016/081181
Authority: WO
Inventors: 貴志野本; ひかり川上
Original assignee: ユニ・チャーム株式会社
Priority date: 2015-12-29
Filing date: 2016-10-20
Publication date: 2017-07-06
Also published as: TWI695713B; JP2017119049A; CN107693220A; TW201729771A; JP6226947B2

Abstract

The present invention provides an absorbent article that both feels comfortable when worn and has high absorption performance. In this absorbent article (1), a long absorbent main part (2) having a lengthwise direction and a widthwise direction has, provided in the lengthwise direction, a front-side area (A₁) that is positioned at the front side of a wearer when the absorbent article (1) is worn, a rear-side area (A₃) that is positioned at the rear side of the wearer when the absorbent article (1) is worn, and an excretion orifice-corresponding area (A₂) that is positioned between the front-side area (A₁) and the rear-side area (A₃), and corresponds to an excretion orifice of the wearer when the absorbent article (1) is worn. The absorbent main part (2) is formed such that the torsional torque value of the rear-side area (A₃) is smaller than that of the excretion orifice-corresponding area (A₂), and smaller than 8 mN.

Description

Absorbent articles

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

Absorbent articles such as sanitary napkins, panty liners, and incontinence pads are worn while in contact with the crotch of the wearer, so that the wearer's Absorbent articles that are easy to deform following the shape (that is, excellent fit) have been studied.

As such an absorbent article, for example, Patent Document 1 discloses an absorbent article including an absorbent layer, and the absorbent layer includes a plurality of slits or a stretchable zone formed by local stretching. The absorbent article has been proposed. According to the absorptive article indicated by this patent documents 1, it is supposed that the physical compatibility (namely, fit nature) to the wearer of an absorptive article can be improved.

Special table 2007-523665 gazette

The absorbent article disclosed in Patent Document 1 is not provided with an extensible zone according to a wearer's movement mode, and the extensible zone extends in the longitudinal direction from the front region in the longitudinal direction of the absorbent article. It is provided over the back side area. However, the absorbent article worn by the wearer, in the longitudinal rear side region corresponding to the wearer's buttocks, when the wearer performs an operation such as walking, the wearer's buttocks move alternately left and right Since a force is applied in a direction twisting around the longitudinal direction of the absorbent article, when the extensible zone is arranged as in Patent Document 1 described above, the force in the twisting direction in the rear side region is It is transmitted to the area corresponding to (or in contact with) the excretion opening, whereby the area corresponding to the excretion opening may be deformed, causing the wearer to feel a foreign object, a sense of incongruity, etc. there were.
Further, as in the absorbent article disclosed in Patent Document 1, when the absorber is configured to be stretchable by a slit or the like, the absorption performance of the absorber (particularly, the portion configured to be stretchable by a slit or the like) In general, the absorption performance is reduced. However, in the absorbent article disclosed in Patent Document 1, the absorbent performance of the absorber is not specifically taken into consideration, and therefore the absorbent performance of the absorbent body is sufficiently exhibited depending on the wearer's operation mode, wearing time, and the like. However, there is a possibility that leakage of excretory fluid discharged from the wearer, liquid return (rewetting), or the like may occur.

Therefore, an object of the present invention is to provide an absorbent article having both excellent wearing feeling and high absorption performance.

The absorbent article which concerns on 1 aspect (aspect 1) of this invention is an absorbent article provided with the vertically long absorption main-body part which has a longitudinal direction and the width direction, Comprising: The said absorption main-body part absorbs in the said longitudinal direction. Positioned between the front side region located on the front side of the wearer when wearing the absorbent article, the rear side region located on the rear side of the wearer when wearing the absorbent article, and the front side region and the rear side region And an excretion port corresponding region corresponding to the excretion port of the wearer when the absorbent article is worn, and the torsional torque value of the rear region corresponds to the torsion torque of the excretion port corresponding region It is smaller than the value and smaller than 8 mN.

The absorbent article of aspect 1 is configured such that the torsional torque value in the rear side region, which is a region corresponding to the wearer's buttocks at the time of wearing, is small (less than 8 mN) in the absorbent main body. (That is, the rear region is configured to be easily deformed in a direction to be twisted about the longitudinal direction of the absorbent article), so that the wearer of the absorbent article wears it when performing an operation such as walking. As the person's buttocks move alternately left and right, the absorbent article is twisted around the longitudinal direction of the absorbent article in the rear region of the absorbent article (hereinafter, simply referred to as “twisted direction”). Even if force is applied to the rear side region, the rear side region can be deformed in the twisting direction in accordance with the movement of the wearer, so that the rear side region can be kept in close contact with the skin surface of the wearer. (sand Chi, it is possible) to obtain an excellent wearing feeling, the direction of the force twists above is buffered by the deformation of the rear region, less likely to be transmitted to the corresponding to the excretion area.
On the other hand, the excretion opening corresponding region in the absorption main body is configured such that the torsional torque value is relatively larger than the rear region, so that the excretion is relatively less affected by the wearer's movement or the like. In the mouth-corresponding region, it is easy to maintain the shape of the absorption main body (that is, the shape of the absorption main body is difficult to deform), and the excretory fluid discharged from the wearer is stably absorbed over a long period of time. be able to.
As a result of the above, the absorbent article of the first aspect can achieve both excellent adhesion to the wearer and high absorption performance.

In another aspect (aspect 2) of the present invention, in the absorbent article according to aspect 1, the absorbent main body portion has a torsional torque value in the front region corresponding to a torsional torque in the excretory opening corresponding region. Equal to or greater than the value.

In the absorbent article according to aspect 2, the torsion torque value in the front region of the absorption main body is equal to or greater than the torsion torque value in the excretory opening corresponding region (that is, the front region is the It is easy to maintain the shape of the absorption main body in the same manner as or more than the excretory opening corresponding region), the region where the shape of the absorption main body is easy to maintain (that is, the region where the shape of the absorption head is difficult to deform) ) Can be ensured more widely, and particularly in the front region located on the front side of the wearer of the absorbent article, the absorbent main body is hardly affected by the movement of the wearer or the elongation of the underwear. The shape of the part can be maintained, and the excretory fluid discharged from the wearer can be more stably and reliably absorbed.

Furthermore, in another aspect (aspect 3) of the present invention, in the absorbent article according to

aspect

1 or 2, the absorbent main body portion has a clothing fixing adhesive portion on the non-skin surface side surface, and the clothing fixing The adhesive part is arranged so that a plurality of adhesives extending continuously or intermittently in the width direction are arranged along the longitudinal direction.

The absorbent article of this aspect 3 has a clothing fixing adhesive portion on the non-skin surface side surface of the absorbent main body, and can be used by being fixed to clothing such as a wearer's underwear, The excretory fluid discharged from the wearer can be absorbed more reliably and more stably. In addition, in the absorbent article according to the third aspect, the clothes fixing pressure-sensitive adhesive portion is arranged such that a plurality of pressure-sensitive adhesives extending continuously or intermittently in the width direction are arranged along the longitudinal direction (that is, the Since the clothes fixing adhesive portion is arranged discontinuously along the longitudinal direction and the clothes fixing adhesive portion does not hinder the deformation in the twisting direction of the absorbent main body portion, the absorbent article is described above. Even if it is used by being fixed to the wearer's underwear as described above, the rear side region of the absorbent main body portion is deformed in the twisting direction according to the movement of the wearer, the elongation of the underwear, etc. It is possible to maintain a state of being in close contact with the skin surface (that is, an excellent wearing feeling can be obtained).

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 absorbent main body portion includes, in the rear side region, an extension region that can extend at least in the longitudinal direction. The excretory opening corresponding region includes a low-extension region that extends across the widthwise central axis extending in the longitudinal direction of the absorption main body portion and has a lower extension rate than the extension region or is non-extendable.

Since the absorptive article of this mode 4 is constituted so that the back side field used as the field corresponding to a wearer's buttocks at the time of wear may contain an extension field, when a wearer performs operation, such as walking, The stretched region in the rear side region stretches and deforms not only in the above-described twisting direction but also in the longitudinal direction in accordance with the wearer's movement (especially, left and right alternating movement in the buttocks) and underwear stretching. Thus, the rear side region of the absorption main body can be brought into close contact with the skin surface of the wearer with higher accuracy (that is, a better wearing feeling can be obtained).
On the other hand, since the region corresponding to the excretion opening of the absorption main body portion is configured to include a low extension region (that is, a region where the shape of the absorption main body portion is difficult to deform), the influence of the wearer's movement or the like is relatively In a small amount of the region, the shape of the absorption main body can be easily maintained, and excretory fluid discharged from the wearer can be more stably absorbed over a long period of time.

Furthermore, in another aspect (aspect 5) of the present invention, in the absorbent article according to aspect 4, the absorbent main body portion is positioned in the longitudinal direction of the absorbent main body portion with respect to the low extension region in the excretory opening corresponding region. It has an extension region located on both sides and extending from the extension region of the rear side region.

The absorbent article according to this aspect 5 has an extension region in which the absorption main body portion extends from the rear side region and is located on both sides in the longitudinal direction of the absorption main body portion with respect to the low extension region in the excretory mouth corresponding region. Therefore, the force in the above-described twisting direction is transmitted from the rear side region of the absorption main body portion by an operation such as walking of the wearer, or in the width direction of the absorption main body portion by the wearer's buttocks. Even when force is applied, these forces can be buffered by the deformation of the extension region in the excretory opening corresponding region. Thereby, since the absorbent article of this aspect 5 becomes easier to maintain the shape of the central portion in the width direction (that is, the low extension region in the excretion port corresponding region) in the excretion port corresponding region of the absorption main body part, the wearer It is possible to more stably and reliably absorb the excretory fluid discharged from the water.

Furthermore, in another aspect (aspect 6) of the present invention, in the absorbent article according to

aspect

4 or 5, the absorbent main body portion has a low elongation extending from the low elongation region of the excretory opening corresponding region in the front region. Has a region.

In the absorbent article according to this aspect 6, the low extension region of the absorbent main body portion extends from the front side region to the excretory opening corresponding region, and the shape of the absorbent main body portion is easily maintained (that is, hardly deformed). ) Since it is possible to secure a wider area, it is easy to maintain the shape of the absorbent main body part, particularly in the front side area, which is relatively less affected by the wearer's movement and underwear elongation. The discharged excreta can be more stably and reliably absorbed over a long period of time.

Furthermore, in another aspect (aspect 7) of the present invention, in the absorbent article according to any one of the aspects 4 to 6, the absorbent main body portion includes the extension region in the rear side region and the absorption in the rear side region. It has a low extension region located between the rear end edge of the main body.

In the absorbent article according to aspect 7, the region between the extension region and the rear end edge in the rear side region is a portion that is relatively less affected by the wearer's movement or underwear extension. In addition, when the low elongation region is arranged in such a region, it is possible to ensure excellent strength and absorption performance as an absorbent article.

Further, in another aspect (aspect 8) of the present invention, in the absorbent article according to any one of aspects 4 to 7, the absorbent main body portion has an elongation ratio in the longitudinal direction of the elongated region of 10% or more.

The absorbent article according to aspect 8 has an elongation rate of 10% or more in the longitudinal direction of the elongated region of the absorbent main body, and the elongated region is more easily deformed. The effect of the extension region in the absorbent article (particularly, “when the wearer performs an action such as walking, the extension region in the rear side region is the wearer's movement (particularly, left and right alternating movement in the buttocks) In accordance with the extension of the underwear, etc., not only the deformation in the twisting direction described above, but also the deformation in the longitudinal direction causes the rear side region of the absorbent main body part to more closely contact the skin surface of the wearer. It is possible to exhibit the effect (that is, it is possible to obtain a better wearing feeling) ”more reliably and more reliably.

Furthermore, in another aspect (aspect 9) of the present invention, in the absorbent article according to any one of aspects 4 to 8, the absorbent main body portion includes a liquid-permeable surface sheet positioned on the skin surface side in the thickness direction. A liquid-impermeable back sheet positioned on the non-skin surface side in the thickness direction, and an absorber positioned between the sheets and extending from the front region to the rear region in the longitudinal direction And comprising
The absorber has a plurality of slit portions extending in the width direction of the absorption main body portion in the extension region.

In the absorbent article according to this aspect 9, since the absorbent body constituting the absorbent main body portion has a plurality of slit portions extending in the width direction of the absorbent main body portion in the elongated region, the wearer performs an operation such as walking. When this is done, the extension region is not only deformed in the twisting direction as described above, but also in the longitudinal direction in accordance with the wearer's movement (especially left and right alternating movement in the buttocks) and underwear extension. It is easy to do, and the area | region containing the expansion | extension area | region of the said absorption main-body part can be closely_contact | adhered to a wearer's skin surface more accurately and more reliably.
Furthermore, since the absorber that occupies most of the thickness of the absorption main body portion has a plurality of slit portions, not only the absorber but also the flexibility (particularly in the thickness direction and width) of the absorption main body portion is excellent. Flexibility in the direction) can be imparted, and thus the absorbent article of the ninth aspect including such an absorbent body can obtain further excellent body compatibility (that is, fit) as an absorbent article.

Furthermore, in another aspect (aspect 10) of the present invention, in the absorbent article according to aspect 9, the plurality of slit portions are adjacent to each other in the longitudinal direction of the absorbent main body portion in plan view. They are arranged so as to partially overlap in the direction.

In the absorbent article according to this aspect 10, the plurality of slit portions in the elongated region are arranged such that the slit portions adjacent to each other in the longitudinal direction of the absorbent main body portion partially overlap in the longitudinal direction in plan view. (In other words, the plurality of slit portions in the extension region are arranged in plan view so that the slit portions adjacent to each other in the longitudinal direction of the absorption main body portion do not completely overlap in the longitudinal direction. Therefore, when the stretched region is deformed in the twisting direction or the longitudinal direction by the wearer's movement or the like, the absorber is torn in the slit portion and torn in the longitudinal direction. Less likely to occur.
Further, in the absorber, a portion where the slit portion does not exist can exhibit a predetermined absorption performance. Therefore, when a plurality of slit portions are arranged as described above in the extension region, the predetermined absorption is achieved. A portion capable of exhibiting performance is not unevenly distributed in the extension region, and a predetermined absorption performance can also be exhibited in the extension region.
Therefore, the absorbent article according to the tenth aspect can more reliably exhibit the above-described effects obtained by the elongated region, and can also stably exhibit the absorption performance in the elongated region.

Furthermore, in another aspect (aspect 11) of the present invention, in the absorbent article according to aspect 9 or 10, the absorbent body includes a slit part existence region in which the plurality of slit parts are present in the extension region, and a slit part. And the slit part non-existing region is a first non-extended region extending from the one end to the other end in the width direction of the absorber in plan view. And a second non-existing region that intersects the first non-existing region and extends rearward from one end to the other end in the width direction of the absorber. , In a region surrounded by the first non-existing region and the second non-existing region.

The absorbent article of this aspect 11 has the slit part nonexistent region extending in the two specific directions in the elongated region, while sufficiently ensuring the strength and absorption performance as the absorber. By having the slit part existence area surrounded by the slit part non-existence area, the extension range of the absorber can be made longer, so even if the wearer's movement is large, the good absorption performance is maintained. However, the said absorption main-body part can be made to contact | adhere to a wearer's skin surface reliably.

Furthermore, in another aspect (aspect 12) of the present invention, in the absorbent article according to any one of aspects 9 to 11, the absorbent body includes an absorbent core containing an absorbent material and at least one sheet surrounding the absorbent core. The extensible sheet is extendable at least in the longitudinal direction.

In the absorbent article according to the twelfth aspect, the extensible sheet surrounding the absorbent core of the absorbent body can be extended at least in the longitudinal direction of the absorbent main body, and the absorbent body moves the wearer (especially the right and left in the heel part). (Alternate movement) and the stretch of the underwear, etc., because it is configured to be more easily deformed in the twisting direction and the longitudinal direction as described above. It can be adhered to the skin surface, and moreover, the state where the elongated region is adhered to the wearer's skin surface can be more reliably maintained (that is, an excellent wearing feeling can be more reliably obtained). ).
Further, when the absorber occupying most of the thickness of the absorbent main body is configured to be more easily deformed as described above, the absorbent main body as well as the absorber can be further improved in flexibility (particularly, thick). Since flexibility in the width direction and the width direction) can be imparted, it is possible to obtain further excellent body compatibility (that is, fit) as an absorbent article.

Furthermore, in another aspect (aspect 13) of the present invention, in the absorbent article according to aspect 12, the extensible sheet is made of a nonwoven fabric, and the nonwoven fabric is made of fibers oriented along the width direction of the absorbent main body. Including.

In the absorbent article of aspect 13, the extensible sheet surrounding the absorbent core of the absorbent body is constituted by a specific nonwoven fabric, that is, a nonwoven fabric containing fibers oriented along the width direction of the absorbent main body. While maintaining the extensibility of the extensible sheet in the longitudinal direction of the absorbent main body portion, the excretory fluid discharged from the wearer is diffused in the width direction by the constituent fibers of the extensible sheet while being spread on the absorbent core. (That is, excellent absorption performance (absorption efficiency) can be obtained while securing extensibility in the longitudinal direction).

Furthermore, in another aspect (aspect 14) of the present invention, in the absorbent article according to any one of the aspects 9 to 13, the back sheet has a bellows structure extending in the longitudinal direction of the absorbent main body in the elongated region. Have.

Since the liquid-impermeable back sheet has a bellows structure in the elongated region, the absorbent article of this aspect 14 has a leak-proof property against the excretory fluid of the wearer due to the liquid-impermeable characteristic of the back sheet. The stretchability in the longitudinal direction of the stretched region can be more reliably obtained by the stretchable bellows structure while ensuring.
In addition, as described above, when a plurality of slit portions are formed in the absorber, excretion fluid discharged from the wearer easily reaches the back sheet through the slit portions. The absorbent article can diffuse the excretory fluid that has reached the back sheet in the width direction along a groove extending in the width direction of the bellows structure. Thereby, even if the excretion liquid discharged from the wearer reaches the back sheet through the slit portion, the excretion liquid is diffused in the width direction in the back sheet, and the non-skin surface side of the absorber It can be absorbed from a wide area on the surface.
Furthermore, if the back sheet has the bellows structure as described above, it is possible to impart flexibility, cushioning properties, etc. in the thickness direction of the absorbent article, further improving the wearing feeling of the absorbent article. Can be made.
Further, if the back sheet has a bellows structure in the extension region, it is easy to visually recognize that the region is an extensible part. There is also an advantage that it is easy to recognize that the article is a product particularly excellent in extensibility and flexibility.

According to the present invention, it is possible to provide an absorbent article having both excellent wearing feeling and high absorption performance.

FIG. 1 is a plan view of a sanitary napkin 1 according to an embodiment of the present invention as viewed in the thickness direction from the top sheet side. FIG. 2 is a plan view of the sanitary napkin 1 according to an embodiment of the present invention as viewed in the thickness direction from the back sheet side. Figure 3 is an end view of a cross section along the widthwise center axis C _L extending in the longitudinal direction of FIG. 1 in the sanitary napkin 1 according to one embodiment of the present invention. 4 is a cross-sectional view of the sanitary napkin 1 according to the embodiment of the present invention, taken along line IV-IV in FIG. FIG. 5 is a perspective view schematically showing a state in which the sanitary napkin 1 according to an embodiment of the present invention is twisted in a direction twisted about the longitudinal direction. FIG. 6 is a plan view of the absorbent body 22 used in the sanitary napkin 1 according to one embodiment of the present invention in an unstretched state (natural state). FIG. 7 is a plan view of the absorbent body 22 used in the sanitary napkin 1 according to the embodiment of the present invention in an extended state. Figure 8 is an end view of a cross section along the widthwise center axis C _L extending in the longitudinal direction of FIG. 1 in the extended state of the sanitary napkin 1 according to one embodiment of the present invention. FIG. 9 is a schematic diagram showing a state in which a measurement sample is set in a torque tester when measuring a torsional torque value.

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

Various directions and the like used in this specification are as follows unless otherwise specified.
In this specification, “width direction W” refers to “a direction in which the length of a vertically long object in a plan view is short (short direction)”, and “long direction L” refers to “a vertically long object in a plan view” "Thickness direction T" refers to "perpendicular direction with respect to the object placed on the horizontal plane in the unfolded state", and these width direction W, longitudinal direction L and thickness. The length directions T are orthogonal to each other.
Further, in this specification, “in the longitudinal direction L of the absorbent article, when the wearer wears the absorbent article, one side which is relatively proximal to the wearer's abdomen” The front side of the absorbent article ”,“ in the longitudinal direction L of the absorbent article, when the wearer wears the absorbent article, it is relatively distal to the wearer's abdomen (that is, the wearer's back). “The other side which is relatively proximal to the side” is referred to as “the rear side of the absorbent article”.
Further, in the present specification, “relative to the widthwise central axis C _L extending in the longitudinal direction L in the width direction W of the vertically long object (for example, absorbent article, absorbent main body, absorber, etc.). It called the proximal side, "" inward in the width direction ", in the width direction W of the object of" the portrait, the relatively distal "with respect to the widthwise central axis C _L in the" width direction "Outside".
In this specification, unless otherwise specified, in the thickness direction T of the absorbent article, “relatively proximal to the skin surface of the wearer when the absorbent article is worn” "Side" and "relative to the skin surface of the wearer when the absorbent article is worn" is referred to as "non-skin side".

FIG. 1 is a plan view of the sanitary napkin 1 according to an embodiment of the present invention in a state where the sanitary napkin 1 is expanded, as viewed in the thickness direction T from the surface sheet side, and FIG. It is the top view seen in thickness direction T from the back sheet side. 1 and 2, the upper side of the drawing corresponds to the front side of the absorbent article, and the lower side of the drawing corresponds to the rear side of the absorbent article.
Further, FIG. 3, the in sanitary napkin 1 is an end view of a cross section along the widthwise center axis C _L extending in the longitudinal direction L of Figure 1, in Figure 4, the sanitary napkin 1, FIG. 1 FIG. 4 is a cross-sectional view taken along line IV-IV.

As shown in FIGS. 1 and 2, the sanitary napkin 1 according to the present embodiment has a vertically long overall outer shape in the longitudinal direction L in plan view. The outer edge near the front side of the central portion in L has a shape protruding in a substantially trapezoidal shape toward the outer side in the width direction W. Specifically, the sanitary napkin 1 includes, in plan view, a longitudinally long absorbent main body 2 having a longitudinal direction and a width direction, and a central portion in the longitudinal direction L of the absorbent main body 2. Arranged at each of the pair of substantially

trapezoidal flap portions

3 and 3 ′ and the pair of

flap portions

3 and 3 ′ extending on both sides in the longitudinal direction L of the absorbent main body portion 2 at a position closer to the front side. And a pair of clothes-fixing

adhesive portions

4, 4 ′ extending in the longitudinal direction L.

As shown in FIGS. 3 and 4, the absorbent main body 2 has a liquid-permeable surface sheet 21 located on the skin surface side and a liquid-impermeable surface located on the non-skin surface side in the thickness direction T. A back sheet 23, an absorber 22 having a plurality of slits S positioned between the sheets and extending in the width direction W, and a continuous surface in the width direction W on the non-skin surface side surface of the back sheet 23 Or, a plurality of adhesives 9 that intermittently extend are arranged along the longitudinal direction L (in a so-called stripe shape), and a clothing fixing adhesive part, and excreted from the wearer. It is comprised so that a liquid can be absorbed and hold | maintained. On the other hand, as shown in FIGS. 1, 2, and 4, the

flap portions

3, 3 ′ are positioned on the skin surface side in the thickness direction T and extend in the width direction W from the absorption main body portion 2. The front surface sheet 21, the back surface sheet 23 positioned on the non-skin surface side and extending in the width direction W from the absorption main body 2, and the longitudinal surface disposed on the non-skin surface side surface of the back surface sheet 23 And an

adhesive portion

4, 4 ′ for fixing clothes extending in the direction L.

In addition, when the sanitary napkin 1 is worn, the surface on the skin surface side of the wearer's clothing by the clothing fixing adhesive portion disposed on the surface on the non-skin surface side of the absorption body portion 2 when the absorbent body portion 2 is worn. After being fixed to each other, the pair of

flap portions

3, 3 ′ are folded back to the non-skin surface side of the clothing, respectively, and the

adhesive portions

4, 4 ′ arranged on the non-skin surface side surface of each of the

flap portions

3, 3 ′. The surface on the non-skin surface side of the pair of

flap portions

3, 3 ′ is used by the wearer when the sanitary napkin 1 is worn. It becomes the surface opposite to the skin surface.

As shown in FIG. 1, the absorbent main body 2 has a front edge 5 in the longitudinal direction L located on the wearer's front side (abdomen side) when wearing the sanitary napkin 1 in plan view; And a rear side edge 6 in the longitudinal direction L positioned on the wearer's rear side (back side) when the sanitary napkin 1 is worn, and further, between these end edges, the longitudinal In the direction L, the front region A ₁ positioned on the front side of the wearer when the sanitary napkin 1 is worn, the rear region A ₃ positioned on the rear side of the wearer when the sanitary napkin 1 is worn, and the front It has an excretion opening corresponding area A ₂ located between the side area A ₁ and the rear side area A ₃ and corresponding to the excretion opening of the wearer when the sanitary napkin 1 is worn. Incidentally, the absorber 22, as shown in FIGS. 1 to 3 are arranged so as to extend over from the front side region A ₁ on the rear side region A _3.
And in the sanitary napkin 1 which concerns on this embodiment, as shown in FIG. 1, the said front side edge part 5 and the said back side edge part 6 of the absorption main-body part 2 are respectively substantially planar shapes of circular arc shape. Each of the above-described regions A ₁ to A ₃ extends in a band shape or a substantially rectangular shape between the front side edge portion 5 and the rear side edge portion 6. In the absorbent article of the present invention, the planar view shape of each end edge and the manner in which each region extends are not particularly limited, and any plan view shape and manner can be adopted.

Here, in the present specification, the “excretion area corresponding area” refers to an area that faces or contacts the excretion opening of the wearer when the wearer wears the absorbent article, and the type of the absorbent article, Specifically, the type of excretion fluid such as urine, feces, and menstrual blood discharged from the wearer, the age and sex of the wearer, the position and area where the wearer's excretion opening faces or contacts, and the structure of the absorption layer It is an area | region set suitably for every kind of absorbent article according to etc.
In addition, the excretion opening corresponding region is usually a position near the center or the front side in the longitudinal direction L of the absorbent article (for example, an absorbent article in which the absorbent article is composed of an absorbent main body part and a flap part). Is composed of an absorbent main body portion having a narrowed portion where the absorbent article is constricted inward in the central portion in the longitudinal direction L, in a plan view, the position overlapping the flap portion in the longitudinal direction of the absorbent main body portion. In the case of the absorbent article, the position corresponding to the constricted part of the absorbent main body part in plan view, or if the absorbent article is composed of an oblong absorbent main body part, In a position extending across the longitudinal central axis extending in the width direction W), and the like in the longitudinal direction about 1/3 or more of the total length in the longitudinal direction L of the absorbent article, and about 1 / total length in the width direction W of the absorbent article. It is set to have a width direction length of 3 or more , For example, when the absorbent article is such napkins for night, the longitudinal length, also be set to be less than one third of the total length in the longitudinal direction L of the absorbent article.

The sanitary napkin 1 according to this embodiment, the torsional torque value of the rear region A ₃ of the absorbent main body portion 2 is smaller than the torsional torque value of the corresponding to the excretion area A _2, and , Smaller than 8 mN.
Here, FIG. 5 is a perspective view schematically showing a state in which the sanitary napkin 1 according to an embodiment of the present invention is twisted in a direction twisted about the longitudinal direction L.
As the sanitary napkin 1 of the present embodiment, in the absorbent main body 2 is configured to be (less than 8 mN) rear torsion torque value of the region A ₃ is small (i.e., the rear side As shown in FIG. 5, the region A ₃ is configured to be easily deformed in a direction twisted about the longitudinal direction of the absorbent article), and the wearer of the sanitary napkin 1 (absorbent article) walks or the like when performing the operation, by the buttocks of the wearer moves alternately left and right, even as the absorbent main body 2 of the force in the rear region a ₃ in the direction of twist of the above is applied, the rear region a ₃ by is deformed in a direction in which twists above in accordance with the movement of the wearer, the skin surface of the rear region a ₃ wearer (especially, excretion portion of the wearer) to maintain the state of being in close contact with the (That is, a good wearing feeling With Rukoto can), the direction of the force twists above is buffered by the deformation of the rear region A _3, less likely to be transmitted to the corresponding to the excretion area A _2.
On the other hand, corresponding to the excretion area A ₂ in the absorbent body 2, since the torsion torque value is configured to be relatively larger than the rear region A _3, the influence due to the operation of the wearer in relatively few such excretion corresponding region a _2, easy to maintain the shape of the absorbent body unit 2 (i.e., the shape of the absorbent main body 2 is hardly deformed), and hold the liquid waste discharged from the wearer It can be stably absorbed over time.

In the present specification, the “torsional torque value” means a value of torque when twisting around the longitudinal direction L of the vertically long object (that is, the absorption main body), and the longitudinal direction of the object is This is an index indicating the ease of deformation in the direction of twisting as an axis (that is, the ease of twisting).
This torsion torque value can be measured according to <Method for Measuring Torsion Torque Value> described later.

In the absorbent article of the present invention, the torsional torque value of the rear region in the absorbent main body is not particularly limited as long as it is a value smaller than 8 mN, from the point that the above-described effects are more prominently exhibited. The torsion torque value is particularly preferably a value smaller than 7 mN. Further, the lower limit value of the torsional torque value in the rear side region is not particularly limited, but the torsional torque value is, for example, 1 mN or more from the viewpoint of ensuring the strength of the absorption main body part and preventing twisting. Is preferred.

In the absorbent article of the present invention, it is preferable that the absorbent main body portion has a torsional torque value in the front region equal to or greater than a torsional torque value in the excretory opening corresponding region.
When the torsional torque value in the front side region of the absorption main body is equal to or greater than the torsional torque value in the excretory port corresponding region (that is, the front side region is the same as the excretory port corresponding region or In addition, since it is easier to maintain the shape of the absorbent main body part), it is possible to secure a wider area for maintaining the shape of the absorbent main body part. In the front region located at the front, the shape of the absorbent main body can be maintained with little influence from the movement of the wearer of the absorbent article, the stretch of the underwear, etc., and excreted liquid discharged from the wearer Can be absorbed more stably and reliably.

And the sanitary napkin 1 which concerns on this embodiment is the clothing fixing adhesive part by which the several adhesive 9 is arrange | positioned on the surface of the non-skin surface side of the back surface sheet 23 in the absorption main body part 2 as above-mentioned. Therefore, the sanitary napkin 1 can be used while being fixed to clothes such as the underwear of the wearer, and the excretory fluid discharged from the wearer can be absorbed more reliably and stably. However, in the sanitary napkin 1 according to the present embodiment, a plurality of adhesives 9 extending continuously or intermittently in the width direction W are arranged along the longitudinal direction L in the clothes fixing adhesive part. (That is, the clothing fixing adhesive portion is discontinuous along the longitudinal direction L), and the clothing fixing adhesive portion is twisted in the above-described twisted direction in the rear region A ₃ of the absorbent main body 2. Because it does not hinder deformation, Also the napkin 1 as has been used by fixing to the wearer's undergarment as described above, the direction the the rear region A ₃ of the absorbent main body 2, which twists the above in accordance with the elongation or the like of the wearer's movements and underwear It can deform | transform into and can maintain the state closely_contact | adhered to a wearer's skin surface.

In the present invention, the pressure-sensitive adhesive in the clothes fixing pressure-sensitive adhesive part is not particularly limited as long as it can fix the absorbent article to the wearer's clothes (such as underwear). Can be used.

Moreover, in the sanitary napkin 1 according to the present embodiment, as shown in FIG. 1, the absorption main body 2 includes an extension region E ₃ that can extend at least in the longitudinal direction L in the rear side region A ₃ , and low elongation which is the absorbent main body 2 in the longitudinal direction L extending widthwise central axis C _L extending across and in having a lower elongation than the elongation zone E ₃ or a non-extended in corresponding to the excretion area a ₂ and it is configured to include a region N _2.

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

Sanitary napkin 1 according to this embodiment, since the rear region A ₃ which is a region corresponding to the buttocks of a wearer is configured to include an extension area E _3, the operation such as walking by the wearer when performed, the elongation zone E ₃ in the rear region a _3, wearer motion (in particular, the right and left alternating motion at the hips) in accordance with the elongation or the like and underwear, only deformation of the direction of twist of the above not, by also extending deformed longitudinally L, and rear region a ₃ of the absorbent main body 2, can be brought into close contact with the greater skin surface accurately wearer.
Furthermore, the absorbent main body 2 of corresponding to the excretion area A ₂ is the low elongation region N ₂ because it is configured to include a _(i.e., the shape of the absorbent main body 2 is hardly region variant), the wearer's operation or the like in effect it is relatively small the area a ₂ by the easy to maintain the shape of the absorbent body 2 can be absorbed more stably for a long time the ejected liquid waste from the wearer.

In the absorbent article of the present invention, it is preferable that the absorbent main body portion has an elongation rate in the longitudinal direction L of the elongated region of 10% or more.
When the stretch rate is 10% or more, the stretched region is more easily deformed. Therefore, when the wearer performs an action such as walking, the back and rear effects are obtained. The stretched region in the side region is not only deformed in the twisting direction as described above, but also stretched in the longitudinal direction in accordance with the wearer's movement (particularly the left and right alternating movement in the buttocks) and the stretch of the underwear. The action and effect that the rear side region of the absorption main body portion can be brought into close contact with the wearer's skin surface with higher accuracy can be exhibited better and more reliably.
In addition, since the difference with the expansion | extension rate of the underwear (especially shorts) which pastes a sanitary napkin will become small if the above-mentioned elongation rate is high, sanitary napkin is made more with respect to a wearer's movement and movement of underwear. There is also an advantage that it can be easily interlocked, that is, it can be excellent in wearing feeling. In particular, in terms of ease of attachment to shorts and ease of familiarity with shorts, predetermined two directions that conflict with the object according to the method described in “6.3 Tensile Strength and Elongation Ratio” of JIS L 1913: 2010. It is preferable that the film can be stretched by 3% or more when pulled with a force of 0.5 N.

Furthermore, in the sanitary napkin 1 according to this embodiment, the low elongation region N ₂ of the corresponding to the excretion area A ₂ is 1, 2, and 4, in plan view, the widthwise center axis C _L 2 lines recess P with a high density of the bottom portion than and the other portion extending in the longitudinal direction L of the absorbent main body 2 on both sides of, and a P '. In the present embodiment, the two linear recesses P, P ', as shown in FIG. 1, extends over the rear region A ₃ from the front side area A _1.
Although it is not essential in the absorbent article of the present invention to have such a linear recess, if the absorbent article has such two linear recesses, the absorbent article is moved by the wearer's action. Even in the case where the above-described twisting force is applied to the rear side region or the force is applied in the width direction W of the absorbent main body by the wearer's buttocks, the center of the excretory mouth corresponding region is particularly In a region to be a part (that is, a region sandwiched between the two linear concave portions), the shape of the absorbent main body portion is more easily maintained by the rigidity of the hard linear concave portion, and is discharged from the wearer. The excretion fluid such as menstrual blood can be more stably and steadily absorbed. Furthermore, in the region sandwiched between the two linear recesses, the absorbent material described later in the absorption main body is partitioned by the two linear recesses, and it is difficult to move from the region, The absorption performance of the absorption main body (particularly, the excretion opening corresponding region) can be exhibited well and stably.

In the present embodiment, the linear recesses P and P ′ are formed by heating or non-laminating a laminated body in which the top sheet 21, the absorber 22 and the back sheet 23 constituting the absorption main body 2 are stacked in this order. It can be formed by pressing in the thickness direction T from the skin side surface of the topsheet 21 using any pressing means such as heating embossing.

In the present invention, the shape of the linear concave portion in plan view is not particularly limited, and may be a straight line, a broken line, a zigzag, a geometry, as well as a shape (see FIG. 1) combining curves as in the above-described embodiment. Arbitrary shapes such as a shape and a predetermined design shape can be adopted.
Further, in the embodiment described above, the two linear recesses P, P 'is viewed in plane, on either side of the widthwise central axis C _L, along the longitudinal direction L of the absorbent main body 2 wherein Although from the front area a ₁ are arranged symmetrically over the rear region a _3, in view of the above-mentioned effects, the linear recess, at least excretion in both sides of the widthwise central axis C _L It suffices if it extends to the mouth-corresponding region, for example, it extends only to the excretory port-corresponding region, or extends from the excretion-corresponding region to the front region or the rear region. it may also be, further, may be arranged a total of three or more on either side of the widthwise central axis C _L. When a plurality of linear recesses that increase the rigidity of the absorption main body are arranged, the shape of the absorption main body is more easily maintained.
Note that the linear concave portion is positioned so as not to overlap with the slit portion of the absorber, which will be described later, in the thickness direction T from the viewpoint of maintaining the shape of the low extension region and ensuring the extensibility of the extension region (ie, overlapping the extension region and the extension region). It is preferable to be arranged at a position that does not become necessary.

Hereinafter, the extension region and the low extension region of the sanitary napkin 1 according to the present embodiment will be described in more detail.
In the sanitary napkin 1 according to this embodiment, as shown in FIG. 1, the absorption main body 2 has a longitudinal direction of the absorption main body _{2 with} respect to the low extension region N ₂ in the excretion opening corresponding region A ₂ . L is configured to have an extended area E ₂ extending from said extension region E ₃ of positioned on both sides and the rear region a ₃ of the.
Such an arrangement, although not an essential configuration in an absorbent article of the present invention, thus absorbing main body 2 is, the absorption body portion 2 with respect to the low elongation region N ₂ in the excretion portion corresponding region A ₂ located on either side of the longitudinal direction L, and has an extension region E ₂ extending from the rear region a _3, twisted from the rear side region a ₃ of the absorbent main body 2 of above by the operation of the walking or the like of the wearer or direction of the forces have been transmitted that, or the wearer's even when a or force is applied in the width direction W of the absorbent main body 2 by the groin, elongation zone E ₂ is deformed in the excretion portion corresponding region a ₂ it is possible to buffer these forces by, sanitary napkin 1 having the above configuration, the widthwise central portion in the excretion portion corresponding region a ₂ of the absorbent body unit 2 (i.e., corresponding to the excretion area a ₂ The shape of definitive low elongation region N ₂₎ is made more easily maintained. Thereby, the sanitary napkin 1 can absorb the excretion liquid discharged | emitted from the wearer more stably and reliably.

In addition, as shown in FIG. 1, the sanitary napkin 1 according to the present embodiment is configured so that the absorption main body 2 is separated from the low elongation region N _{2 of the} excretory opening corresponding region A _{2 in} the front region A ₁ . It is configured to have a low elongation region N ₁ extending.
Such an arrangement, although not an essential configuration in an absorbent article of the present invention, such a low elongation region N ₂ absorption body portion 2 is present across the front area A ₁ to the corresponding to the excretion area A ₂ The sanitary napkin 1 having such a configuration is particularly suitable for the wearer's operation, since the area where the shape of the absorbent main body 2 is easily maintained (that is, it is difficult to be deformed) can be secured. in and elongation the front side area a ₁ effect is relatively small due to such underwear, easy to maintain the shape of the absorbent body 2 more stably over a liquid waste discharged from the wearer for a long time, It can be absorbed more reliably.

Furthermore, the sanitary napkin 1 according to this embodiment, as shown in FIG. 1, the absorbent main body portion 2 is, in the rear region A _3, the absorption and the extension region E ₃ of the rear side in the area A ₃ It is configured to have a low extension region N ₃ positioned between the rear end edge 6 of the main body 2.
This configuration also, although not an essential configuration in an absorbent article of the present invention, the rear-side area A _3, the region between said extension region E ₃ and the rear side edge portion 6, the wearer impact of such as elongation behavior or underwear is relatively small portion, the low elongation region N ₃ in such an area is located, the superior strength and absorption properties as a sanitary napkin (absorbent article) Can be secured.

In this embodiment, each extension area E _2, E ₃ of excretion corresponding regions A ₂ and the rear region A ₃ of the absorbent body 2, as shown in FIG. 1, 3 and 4, the absorbent body A plurality of slits extending through the absorber 22 in the thickness direction T and extending substantially linearly in the width direction W in a predetermined region of the absorber 22 which is the thickest member among the various members constituting the portion 2 It is formed by providing the part S. In the absorbent article of the present invention, the extension region is not limited to such a mode as long as the torsional torque value of the rear region is small (less than 8 mN). For example, you may make it comprise the predetermined | prescribed area | region of the various members (for example, absorber etc.) which comprise the said absorption main-body part with the material which can expand | extend.

As in this embodiment, the absorbent body 22 has a plurality of slit portions extending in the width direction W of the absorption main body portion 2 in each of the extension regions E ₂ and E ₃ in the excretory opening corresponding region A ₂ and the rear side region A ₃ . When the wearer has S, when the wearer performs an action such as walking, the stretched areas E ₂ and E ₃ are the wearer's movements (particularly, left and right alternating movements in the buttocks) and underwear stretch. In accordance with the above, the deformation including not only the above-described deformation in the twisting direction but also the longitudinal direction L is easy to extend and deform, and the region including each of the extension regions E ₂ and E ₃ of the absorbent main body 2 can be more accurately and more It can be made to adhere to a wearer's skin surface reliably.
Furthermore, since the absorbent body 22 occupying most of the thickness of the absorbent main body portion 2 has a plurality of slit portions S, not only the absorbent body 22 but also the flexibility (particularly, the absorbent main body portion 2 is excellent). Since the sanitary napkin 1 including the absorbent body 22 can be imparted with flexibility (thickness direction and flexibility in the width direction), the body compatibility (that is, fit property) is further improved as a sanitary napkin (absorbent article). ) Can be obtained.

Hereinafter, the absorber 22 provided with the plurality of slit portions S described above will be described in more detail with reference to the drawings.
FIG. 6 is a plan view of the absorbent body 22 used in the sanitary napkin 1 according to the present embodiment in an unstretched state (natural state), and FIG. 7 shows the absorbent body 22 used in the sanitary napkin 1. It is a top view of the expansion | extension state. Further, FIG. 8 is an end view of a cross section along the widthwise center axis C _L extending in the longitudinal direction of FIG. 1 in the extended state of the sanitary napkin 1 according to this embodiment.

In this embodiment, the absorber 22 is not particularly limited except that the plurality of slit portions S described above are formed, and any absorber known in the technical field of absorbent articles can be used. As such an absorbent body, for example, an absorbent material containing water-absorbing fibers such as pulp and / or a superabsorbent polymer is used as a liquid-permeable covering sheet (referred to as a “core wrap sheet”) such as at least one tissue. ).
Among them, the absorbent body used in the absorbent article of the present invention includes an absorbent core containing the absorbent material and at least one extensible sheet surrounding the absorbent core as the covering sheet, and the elongation It is preferable that the adhesive sheet is composed of a liquid-permeable sheet that can be extended at least in the longitudinal direction L of the absorbent main body. Thus, when the extensible sheet surrounding the absorbent core of the absorbent body can be extended at least in the longitudinal direction of the absorbent main body, the absorbent body can be moved by the wearer (particularly, left and right alternating movements in the buttocks) In accordance with the extension of the underwear, etc., it becomes easier to deform in the twisting direction and the longitudinal direction as described above, so that the rear side region (particularly, the extension region) of the absorbent main body portion can be more accurately defined. In addition, it is possible to more reliably maintain a state in which the rear region is in close contact with the skin surface of the wearer (that is, an excellent wearing feeling can be more reliably obtained). .
Furthermore, when the absorber occupying most of the thickness of the absorbent main body portion is configured to be more easily deformed in this way, not only the absorber but also the flexibility of the absorbent main body portion (particularly, (Flexibility in the thickness direction and width direction) can be imparted, and thus an absorbent article provided with such an absorbent body can obtain further excellent body compatibility (that is, fit) as an absorbent article. .

In addition, the extensible sheet used for the absorbent body is not particularly limited as long as it is extensible in at least one direction (that is, the longitudinal direction L of the absorbent main body portion), and for example, a nonwoven fabric (including a tissue) or a woven fabric. Any liquid-permeable sheet such as a porous resin sheet can be adopted, but the extensible sheet is preferably composed of a nonwoven fabric from the viewpoint of flexibility, water absorption, etc. What was comprised with the nonwoven fabric containing the fiber orientated along the width direction is still more preferable.
When the extensible sheet surrounding the absorbent core of the absorbent body is constituted by such a nonwoven fabric (that is, a nonwoven fabric including fibers oriented along the width direction of the absorbent main body portion), While ensuring the extensibility in the longitudinal direction of the absorbent main body, the excretory fluid discharged from the wearer can be absorbed by the absorbent core while being diffused in the width direction by the constituent fibers of the extensible sheet (that is, In addition, excellent absorption performance (absorption efficiency) can be obtained while securing extensibility in the longitudinal direction).

In addition, in the absorbent article of the present invention, the thickness of the absorbent body is not particularly limited, and any thickness in consideration of the type and use of the absorbent article, the type of person to be worn, and the like can be adopted. Examples of such thickness include a thickness in the range of 0.1 mm to 10 mm, but in the range of 0.3 mm to 3 mm from the viewpoint of thinning, flexibility, fit, and the like of the absorbent article. Thickness is preferred.

As shown in FIG. 6, the absorbent body 22 in the present embodiment includes a plurality of slit portions S that are adjacent to each other in the longitudinal direction L of the absorbent main body 2 in a plan view. (In other words, a plurality of slit portions S are seen in a plan view, and the slit portions S adjacent to each other in the longitudinal direction L of the absorption main body portion 2 are in the longitudinal direction L). Are arranged so that they do not overlap completely).
When the plurality of slit portions S are arranged in this manner, the extension regions E ₂ and E ₃ formed by the plurality of slit portions S are deformed in the twisting direction or the longitudinal direction L by the wearer's movement or the like. When it does, it will become difficult to happen that the said absorber 22 is torn in the slit part S and torn in the longitudinal direction L. FIG.
Further, in the absorbent body 22, a portion where the slit portion S does not exist can exhibit a predetermined absorption performance. Therefore, the plurality of slit portions S are arranged as described above in the extension regions E ₂ and E ₃ . In this case, a portion capable of exhibiting the predetermined absorption performance is not unevenly distributed in the extension regions E ₂ and E ₃ , and the predetermined absorption performance can be exhibited even in the region.
Therefore, the sanitary napkin 1 having such absorber 22, it is possible to more reliably exhibit the effects of the above to be achieved by the expansion region E _2, E _3, the extension region E _2, E ₃ The absorption performance in can also be exhibited stably.

Moreover, in the sanitary napkin 1 according to the present embodiment, as shown in FIG. 6, the plurality of slit portions S in the absorbent body 22 include a predetermined number of slit portions S in the extension regions E ₂ and E ₃ . , a plurality of slits existing area a _S, the extension and the slit portion absence regions a _N where slits S are not present in the area E _2, E _3, be arranged to have a further, the slit portion non The existence area _AN is a front side (upward in FIG. 6) from one end (one end on the left side in FIG. 6) to the other end (one end on the right side in FIG. 6) in the width direction W of the absorber 22 in plan view. The first non-existing region A _N1 extending to the side), and the first non-existing region A _N1 intersecting the first non-existing region A _N1 and from one end (one end on the left side in FIG. 6) to the other end (in FIG. 6) Toward the right end) Rear side is composed of a second non-existing region A _N2 Metropolitan extending (lower side in FIG. 6), the slit portion existing area A _S, the said first non-existing region A _N1 second non-existing region A A region surrounded by _N2 , or the first non-existing region A _N1 , the second non-existing region A _N2, and a width direction edge e ₁ , e ₂ extending in the longitudinal direction L of the absorber 22. Exists in the area.

When the plurality of slit portions S are arranged in this way, the slit portion non-existing area A _N (that is, the first non-existing area A _N1 and the second non-existing area A _N2 ) in which the absorber 22 extends in the two specific directions described above. by having, while sufficiently securing the strength and absorption performance as an absorber, having a slit portion existing area a _S surrounded by the first non-existing region a _N1 and the second non-existing region a _N2 7 and FIG. 8, the extension range of the absorbent body 22 can be made longer while the absorbent body 22 is stretched uniformly, so that the sanitary napkin provided with the absorbent body 22 can be extended. 1 is capable of sufficiently buffering the force applied to the absorbent main body 2 even when the wearer's movement is large, thereby allowing the absorbent main body 2 to be maintained while maintaining good absorption performance. Ensure the wearer's skin It can be adhered.

In the absorbent article of the present invention, the arrangement of the plurality of slit portions is that of the above-described embodiment as long as the torsional torque value in the rear region is small (less than 8 mN). For example, the plurality of slit portions include a slit portion existing region where a predetermined number of slit portions are present in each region surrounded by a slit portion non-existing region provided in a grid pattern. May be arranged, and is arranged in each of the regions sandwiched between the non-existing regions of the slit portions, in a plurality of striped non-existing regions provided in the longitudinal direction L or the width direction W. It may be.
Further, the plurality of slit portions may be arranged with a predetermined pattern over the entire extension region, and when such an arrangement is adopted, the plurality of slit portions are arranged in the width direction of the absorber. It is preferable to arrange them so that they do not line up along the entire length of W. By arranging the plurality of slit portions in this manner, it is possible to prevent the plurality of slit portions arranged in a straight line from acting like a perforation line and tearing the absorber.

Further, in the sanitary napkin 1 according to the present embodiment, the slit portion S is formed as a substantially straight through hole extending in the width direction W in plan view as shown in FIG. The absorbent article is not limited to such an embodiment, and the slit portion may have an arbitrary plan view shape within a range not impairing the effects of the present invention. Examples of the shape of the slit portion in plan view include arc shapes, V shapes, waveforms, zigzag shapes, and the like.

In the sanitary napkin 1 according to the present embodiment, the length of the slit portion S extending in the width direction W of the absorption main body portion 2 (that is, the length in the width direction of the slit portion) is the torsional torque of the rear region. Although it is not particularly limited as long as it is configured to be small (less than 8 mN), it is preferably in the range of 3 mm to 50 mm, more preferably in the range of 5 mm to 15 mm. When the length of the slit portion is 3 mm or more, the extension region of the absorption main body can be further easily deformed in the above-described twisting direction, and the extension region can be sufficiently extended in the longitudinal direction L. Furthermore, moderate flexibility can be imparted to the absorber or the absorption main body. In addition, when the length of the slit portion is 50 mm or less, when the absorber receives a force from the outer side of the width direction W, it is difficult for the slit portion to open and tear, Good durability can be secured as an absorbent article.

In the present invention, the means for forming a plurality of slit portions in the absorber is not particularly limited, and any cutting means can be adopted. For example, the absorber having a plurality of slit portions is obtained by conveying the precursor of the absorber manufactured by an arbitrary manufacturing method in the longitudinal direction or the width direction of the precursor by a conveying means such as a belt conveyor. It can manufacture by pressing and penetrating the some cutting blade provided on the surrounding surface of the rotating cutting roll on the upper surface of a body. In addition, a several slit part can be formed in an absorber with a predetermined arrangement | positioning form by adjusting arrangement | positioning of the cutting blade of a cutting roll suitably.

Next, in the sanitary napkin 1 according to this embodiment, the pair of substantially

trapezoidal flap portions

3 and 3 ′ extending on both sides in the longitudinal direction L of the absorbent main body portion 2 will be described in more detail.
As described above, the pair of

flap portions

3, 3 ′ includes the top sheet 21 extending in the width direction W from the absorption body portion 2 and the back surface extending in the width direction W from the absorption body portion 2. 1, 2, and 4 are formed on the non-skin surface side surfaces of the

flap portions

3, 3 ′ (that is, the non-skin surface side surface of the back sheet 23). As described above, there are provided substantially rectangular clothes-fixing

adhesive portions

4, 4 ′ extending in the longitudinal direction L.
And in the sanitary napkin 1 which concerns on this embodiment, it is in the said front side edge part 5 among the both ends 7, 8, 7 ', and 8' in the longitudinal direction L of this pair of adhesion parts 4 and 4 '. A first imaginary straight line L ₁ including a pair of first ends 7, 7 ′ located on the proximal side, and a pair of second ends located on the proximal side with respect to the rear end edge 6. The region extending between the second imaginary straight line L ₂ including 8 and 8 ′ corresponds to a region corresponding to (or in contact with) the wearer's excretion port, that is, the excretion port corresponding region A _2. Has been.
Therefore, in the absorbent article of the present invention, the pair of adhesive portions in the flap portion is an arbitrary type considering the type and use of the absorbent article, the type of the person to be worn, the position of the excretion port, the fixing property to clothes, and the like. Dimensional shape, arranged on the non-skin surface side surface of each flap. In the sanitary napkin 1 according to the above-described embodiment, the pair of

adhesive portions

4 and 4 ′ in the

flap portions

3 and 3 ′ has, for example, a length in the longitudinal direction L in the range of 10 mm to 150 mm and a width direction W. Is disposed on the non-skin surface side surface of each of the

flap portions

3 and 3 ′ in a mode having a substantially rectangular planar view shape having a length of 5 mm to 50 mm.

In the absorbent article of the present invention, the pressure-sensitive adhesive forming the clothing fixing adhesive portion in the pair of flap portions is not particularly limited, and is the same as the pressure-sensitive adhesive of the clothing fixing adhesive portion in the above-described absorbent main body portion. Any pressure-sensitive adhesive containing a styrene-based polymer or the like can be used.

Further, in the sanitary napkin 1 according to the present embodiment, the pair of

flap portions

3, 3 ′ extends in the width direction W from the absorption main body portion 2 in plan view, as shown in FIGS. 1 and 4. Although it has a pair of substantially trapezoidal plan view shapes constituted by the surface sheet 21 that has been taken out and the back sheet 23 that extends in the width direction W from the absorbent main body 2, In the absorbent article, the form of the pair of flap portions is not limited to such a form. For example, the pair of flap portions may have a shape in plan view other than the substantially trapezoidal shape (for example, a rectangular shape, A semi-elliptical shape, a predetermined design shape, etc.), and a sheet-like member different from the absorbent main body (that is, a sheet-like member different from the top sheet and the back sheet constituting the main body). May be configured by .
In addition, such a pair of flap parts is not an essential component in the absorbent article of the present invention, and the absorbent article of the present invention has the pair of flaps according to the type and application of the absorbent article. You may be comprised so that it may not have a flap part (namely, only from an absorption main-body part).

Hereinafter, in the sanitary napkin 1 according to the present embodiment, the top sheet 21 and the back sheet 23 constituting the absorption main body 2 and the pair of

flaps

3 and 3 ′ will be described in more detail.

In the sanitary napkin 1 according to the present embodiment, as shown in FIGS. 1, 3, and 4, the topsheet 21 has a longitudinal length of the sanitary napkin 1 on the skin surface side in the thickness direction T of the sanitary napkin 1. be arranged in the width direction central axis on the C _L extending in the direction L, it is formed by direct contact with may liquid-permeable sheet member to the skin surface of the wearer. The liquid-permeable sheet member that constitutes the surface sheet 21 is not particularly limited, and may be any arbitrary one such as an air-through non-woven fabric formed using cellulose fibers or thermoplastic resin fibers subjected to hydrophilic treatment. A nonwoven fabric or the like can be suitably used.

Especially, the sheet | seat member used as a surface sheet of the absorbent article of this invention uses the nonwoven fabric comprised so that the area | region corresponding to the said extending | stretching area | region of the said absorption main-body part could extend | expand at least to the longitudinal direction L. Is preferred. As such a non-woven fabric, for example, a non-woven fabric composed of elastic fibers in which an area corresponding to the extension region of the absorbent main body can be extended, or an area corresponding to the extension region of the absorbent main body can be described later. Nonwoven fabrics and the like constituted by a concavo-convex structure are exemplified.
By using such a nonwoven fabric for the surface sheet, the extension region of the absorbent main body part is more easily deformed in accordance with the movement of the wearer, so that the region is in close contact with the wearer's skin surface, While being able to implement | achieve more reliably, the force of the above-mentioned twist direction applied to the back side area | region of an absorbent article becomes further difficult to transmit to the said excretion opening corresponding | compatible area | region.

Moreover, in the absorbent article of the present invention, the top sheet has higher extensibility than the back sheet described later (that is, it can be extended with a smaller force than the back sheet). It is preferable. When the topsheet has higher extensibility than the backsheet, the topsheet is more easily contracted than the backsheet when shrinking after stretching deformation, so the absorbent article is the surface on the topsheet side. It is easy to deform | transform into the structure (what is called a cup-shaped structure) which became depressed, and it becomes easy to follow a wearer's body shape and the shape of underwear (especially shorts).

In the absorbent article of the present invention, the size and shape of the topsheet is particularly suitable if it can cover the entire surface of the skin surface side of the absorbent body disposed on the non-skin surface side of the topsheet. There is no limitation, and any size and shape can be adopted according to the size, sex, usage, etc. of the person wearing the absorbent article. Further, the thickness of the surface sheet is not particularly limited, and for example, a thickness within the range of 0.001 mm to 5.0 mm can be adopted, which is preferable from the viewpoint of liquid permeability, cushioning properties, and touch. Is in the range of 0.01 mm to 3.0 mm, more preferably in the range of 0.1 mm to 1.0 mm.

In the absorbent article of the present invention, the structure of the surface sheet is not particularly limited. For example, both the skin surface side and the non-skin surface side may have a substantially flat structure. It is preferable that at least a region corresponding to the elongated region of the absorption main body has a stretchable uneven structure. As such an extendable concavo-convex structure, for example, in a plan view, a plurality of linear ridges extending in the width direction W of the surface sheet and arranged in the longitudinal direction L at predetermined intervals, and adjacent ridges The cross-sectional shape along the longitudinal direction L, which is formed by a plurality of linear concave grooves that are located between the portions and extend in the width direction W of the topsheet, is substantially wave-shaped (that is, An uneven structure in which the inside is hollow) is exemplified. Here, in the thickness direction T of the surface sheet, the ridge portion has a structure in which a surface on the skin surface side of the surface sheet protrudes toward the skin surface side, and the groove portion is a thickness of the surface sheet. In the thickness direction T, the surface of the surface sheet has a structure in which the surface on the skin surface side is recessed toward the non-skin surface side.

When a nonwoven fabric having such a stretchable concavo-convex structure is used for a top sheet of an absorbent article, the stretched region of the absorbent main body portion is more easily deformed in accordance with the movement of the wearer. It is possible to more reliably realize the state of being in close contact with the skin surface of the person (that is, it is possible to further improve the wearing feeling of the absorbent article), and the above-described twist applied to the rear region of the absorbent article Force in the direction to be further transmitted to the excretory opening corresponding region.

Further, in the above-described stretchable concavo-convex structure, the height of the ridge portion (that is, the distance between the horizontal plane including the top of the ridge and the horizontal plane including the bottom of the groove) is not particularly limited. , A height in the range of 0.1 mm to 1.2 mm can be employed, but from the viewpoint of extensibility, touch, cushioning properties, etc., it is preferably in the range of 0.2 mm to 1.0 mm. Preferably, it is within the range of 0.4 mm to 0.8 mm.
The height of the ridges is non-contact using a laser displacement meter (for example, high-precision two-dimensional laser displacement meter LJ-G series (model: LJ-G030) manufactured by Keyence Corporation) as follows: It can be measured by the method. A sample of the surface sheet cut out to a size of 100 mm × 100 mm was placed on a horizontal measurement table, and the displacement from the measurement table was measured with a laser displacement meter for five different ridges. Let the average value be the thickness (mm) of the ridges. Similarly, about five different grooved parts, the displacement from a measurement stand is measured with a laser displacement meter, and let the average value of five measured values be the thickness (mm) of a grooved part. From the difference between the thickness (mm) of the ridge and the thickness (mm) of the groove, the height (mm) of the ridge is calculated.

Further, the pitch of the stretchable concavo-convex structure (that is, the distance (mm) between the top centers (ridge lines) of two adjacent ridges) is not particularly limited, and is, for example, 0.5 mm to 5 mm. A pitch in the range of 0.0 mm can be adopted, but from the viewpoint of extensibility and touch, it is preferably in the range of 1.0 mm to 4.0 mm.
The pitch of the concavo-convex structure is measured as the distance (mm) between the top centers (ridge lines) of two adjacent ridges based on a planar photograph or a planar image of the topsheet in a non-pressurized state. Can do.

In the absorbent article of the present invention, the stretchable concavo-convex structure that can be adopted as the structure of the topsheet is not limited to the above-described aspect. For example, the ridges and the groove portions of the above-described concavo-convex structure can be seen in plan view. A mode that partially extends in a direction other than the width direction W of the absorbent article (for example, a direction inclined by a predetermined angle from the width direction W of the absorbent article), or at least partly changing the direction (for example, , Wavy, zigzag, etc.) extending aspect, at least partially discontinuous (ie, intermittent) extending in the width direction W of the absorbent article, at least partially adjacent two ridges An aspect in which the interval between the parts is not constant, an aspect configured by a plurality of convex portions (ridges) as disclosed in Japanese Patent No. 5829349 and Japanese Patent No. 5829326, and a groove portion having a plurality of concave portions, Or this Etc., may be employed embodiments in any combination of two or more aspects of the embodiments.
In this way, by appropriately setting the extending direction and form of the ridge portion and the groove portion, it is possible to arbitrarily adjust the deformation mode of the extension region of the absorbent main body portion, and various actions of the wearer Product design corresponding to the pattern can be realized.

The method for forming the stretchable concavo-convex structure as described above on the top sheet is not particularly limited. For example, a concavo-convex structure having a corrugated cross-sectional shape is formed by continuously blowing gas (usually air) onto the fiber web. Arbitrary methods such as a method of performing, a method of utilizing vacuum forming, a method of utilizing gear stretching, a method of utilizing thermal expansion of heat-extensible fibers and / or heat contraction of heat-shrinkable fibers can be employed. .

In the sanitary napkin 1 according to the present embodiment, as shown in FIGS. 1 to 4, the back sheet 23 is formed in the longitudinal direction L of the sanitary napkin 1 on the non-skin surface side in the thickness direction T of the sanitary napkin 1. be arranged in the width direction central axis on the C _L extending, it is formed by liquid-impermeable sheet member to prevent leakage of liquid waste such as menstrual blood discharged from the wearer. The liquid-impermeable sheet member constituting the back sheet 23 is not particularly limited. For example, a resin film such as polyethylene or polypropylene having air permeability, a laminate in which a nonwoven fabric is bonded to the resin film, or the like. It can be used suitably.

Among them, the sheet member used as the back sheet of the absorbent article of the present invention is a liquid-impermeable material configured such that at least a region corresponding to the elongated region of the absorbent main body can be elongated at least in the longitudinal direction L. It is preferable to use the sheet member. As such a sheet member, for example, a sheet member made of an elastic material in which at least a region corresponding to the extension region of the absorption main body portion can be extended, or a region corresponding to the extension region of the absorption main body portion will be described later. The sheet | seat member comprised by the expandable bellows structure etc. which do is mentioned.
By using such a sheet member for the back sheet, the above-described expandable configuration (such as an accordion structure) while securing leakage resistance against the wearer's excretion liquid by the liquid impermeability characteristic of the sheet member. Since the extension region of the absorbent main body portion is more easily deformed in accordance with the movement of the wearer, the state in which the region is in close contact with the skin surface of the wearer can be more reliably realized (that is, absorbability). The wear feeling of the article can be further improved), and the above-described twisting force applied to the rear area of the absorbent article is further less likely to be transmitted to the excretory opening corresponding area.

In the absorbent article of the present invention, the size and shape of the back sheet is not particularly limited as long as it can prevent the excretion fluid discharged from the wearer from leaking. Arbitrary dimensions and shapes can be adopted depending on the size, sex, application and the like. Further, the thickness of the back sheet is not particularly limited, and for example, a thickness within the range of 0.001 mm to 5.0 mm can be adopted, but from the viewpoint of liquid impermeability, flexibility, air permeability, and the like. The thickness is preferably in the range of 0.003 mm to 3.0 mm, and more preferably in the range of 0.01 mm to 1.0 mm.

In the absorbent article of the present invention, the structure of the back sheet is not particularly limited. For example, both the skin surface side and the non-skin surface side may have a substantially flat structure. The sheet is a bellows extending in the longitudinal direction L of the absorbent main body at least in the extension region of the absorbent main body, like the back sheet 23 of the sanitary napkin 1 according to the present embodiment shown in FIGS. 2 and 3. It preferably has a structure.

In the sanitary napkin 1 according to this embodiment, the bellows structure B formed on the back sheet 23 extends in the width direction W of the back sheet 23 in plan view, as shown in FIGS. 2 and 3. In addition, a plurality of linear grooves B ₁ arranged in the longitudinal direction L at predetermined intervals and a plurality of linear grooves B located between the adjacent protrusions B ₁ and extending in the width direction W of the back sheet 23. ₂ and the cross-sectional shape along the longitudinal direction L is a substantially zigzag shape. Here, in the thickness direction T of the back sheet 23, the convex part B ₁ has a structure in which the skin side surface of the back sheet 23 protrudes to the skin side, and the groove B ₂ In the thickness direction T of the back sheet 23, the skin side surface of the back sheet 23 has a structure that is recessed toward the non-skin side.

Thus, when the liquid-impermeable back sheet 23 has the bellows structure B in the extended region of the absorbent main body 2, leakage of the excrement fluid of the wearer is prevented due to the liquid-impermeable characteristic of the back sheet 23. Since the stretchability in the longitudinal direction L of the stretched region of the absorbent main body 2 can be more reliably obtained by the stretchable bellows structure B while securing the properties, the region is in close contact with the skin surface of the wearer Can be more reliably realized (that is, the feeling of wearing of the absorbent article can be further improved), and the force in the twisting direction applied to the rear region of the absorbent article is It becomes more difficult to transmit to the excretion opening corresponding region.

In addition, in the case of the present embodiment in which the plurality of slit portions S described above are formed in the absorbent body 22, the excretory fluid such as menstrual blood discharged from the wearer is usually back through the slit portion S. Although it is easy to reach the sheet 23, when the bellows structure B as described above is formed on the back sheet 23, the excretion liquid that has reached the back sheet 23 extends along the groove B ₂ extending in the width direction of the bellows structure B. Therefore, even if the excretory liquid discharged from the wearer reaches the back sheet 23 through the slit portion S, the excretion liquid is spread in the width direction in the back sheet 23. While being diffused into W, it can be absorbed from a wide range of locations on the non-skin surface side surface of the absorber 22.

Furthermore, since the back sheet 23 has the bellows structure B as described above, flexibility and cushioning can be imparted in the thickness direction T of the absorbent article. The feeling can be further improved.
In addition, when the back sheet 23 has the bellows structure B in the extension region of the absorbent main body 2, it is easy to visually recognize that the region is an extensible part. There is also an advantage that it is easy to recognize that the absorbent article of the present invention is a product particularly excellent in extensibility, fit, flexibility and the like.

In the above bellows structure, the height of the convex portion (that is, the distance between the horizontal plane including the top of the convex portion and the horizontal plane including the bottom (deepest portion) of the groove) is not particularly limited, and is, for example, 0.1 mm. Although a height in the range of ~ 1.2 mm can be adopted, it is preferably in the range of 0.2 mm to 1.0 mm, more preferably from the viewpoint of extensibility, cushioning properties, liquid diffusibility, and the like. Is in the range of 0.4 mm to 0.8 mm.
In addition, the height of the said convex part can be measured similarly to the height of the convex strip part of the extendable uneven structure in the above-mentioned surface sheet.

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

In the absorbent article of the present invention, the bellows structure that can be adopted as the structure of the back sheet is not limited to the above-described aspect. For example, the convex portion and the groove portion of the bellows structure described above are at least partially in plan view. An aspect extending in a direction other than the width direction W of the absorbent article (for example, a direction inclined by a predetermined angle from the width direction W of the absorbent article), or at least partially changing the direction (for example, wavy or zigzag) An extended aspect, an aspect that extends at least partially in the width direction W of the absorbent article (that is, intermittently), and an interval between at least two adjacent protrusions is constant. A mode that is not, or a mode in which two or more modes are arbitrarily combined can be adopted.
Thus, by appropriately setting the extending direction and form of the convex part and the groove part, it is possible to arbitrarily adjust the deformation mode of the extension region in the absorption main body part, and to various behavior patterns of the wearer Corresponding product design can be realized.

The method for forming the bellows structure as described above on the back sheet is not particularly limited, and any method such as a method using vacuum forming or a method using gear stretching can be employed.

Moreover, in the absorbent article of the present invention, the structure in the low elongation region of the back sheet is not particularly limited, but the back sheet is the back sheet of the sanitary napkin 1 according to the present embodiment shown in FIGS. 2 and 3. 23, it is preferable that both the skin surface side and the non-skin surface side have a substantially flat structure in the low extension region of the absorbent main body.
The back sheet has a substantially flat structure (that is, has a structural element that can serve as a fold starting point) in a low extension region of the absorption main body (particularly, at least a low extension region in the excretory opening corresponding region). If it is not, the shape of the main body in the low extension region is more easily maintained, so that the excretory fluid discharged from the wearer can be more stably absorbed.

In the sanitary napkin 1 according to the present embodiment, the top sheet 21 and the back sheet 23 described above have the outer peripheral edge of each sheet with an adhesive, heat seal, They are joined together by any joining means such as ultrasonic joining.

In this invention, the structure of an absorbent article is not limited to the above-mentioned embodiment, For example, for diffusing excretion liquid between a surface sheet and an absorber and / or between an absorber and a back sheet. An auxiliary sheet or the like may be provided.
As described above, the absorbent article of the present invention is not limited to the above-described embodiment, and can be appropriately combined and changed without departing from the object and spirit of the present invention.

In addition to the sanitary napkin of the above-described embodiment, the present invention can be applied to various absorbent articles such as a panty liner and a (light) incontinence pad. In this specification, ordinal numbers such as “first” and “second” are used to distinguish items with the ordinal numbers, and mean the order, priority, importance, etc. of each item. Not what you want.

Hereinafter, the present invention will be described more specifically with reference to examples and comparative examples. However, the present invention is not limited to such examples.

Example 1
Pulp (basis weight: 150 ± 50 g / m ² ) and superabsorbent polymer (basis weight: 30 ± 10 g / m ² ) are mixed and supplied to the recess for molding of the suction drum, 220 mm × 70 mm × 5 mm An absorbent core having a size of (length in the longitudinal direction × length in the width direction × thickness) was obtained.
The obtained absorbent core is sandwiched between two non-woven fabrics (skin surface side: air-through non-woven fabric having a basis weight of 25 g / m ² , non-skin surface side) with a hot-melt adhesive interposed therebetween. SMS nonwoven fabric with a basis weight of 10 g / m ² ) and one extensible sheet (basis weight 35 g / m ² , 70 mm wide elastic sheet) And placed at a position 10 mm forward from the rear edge of the body) to obtain an absorber precursor.
Next, the thickness of the precursor of the absorber is adjusted to 2 to 4 mm by pressing the obtained precursor of the absorber with a hydraulic press, and then the longitudinal direction of the precursor is changed in the longitudinal direction of the precursor. While transporting so as to be orthogonal to the transport direction (in a so-called cross-flow mode), a plurality of slit portions are formed in the precursor by penetrating a cutting blade provided on the peripheral surface of the cutting roll. An absorbent body (basis weight 150 ± 50 g / m ² , (longitudinal direction) 220 mm × (width direction) 70 mm × (thickness) 2 to 3 mm) was produced. In addition, the pattern (arrangement position of each slit part) and number of the some slit part provided in the absorber were made the same as the absorber 22 shown in FIG. 6, and the width direction length of the slit part was 8 mm.

Liquid permeation in which a concavo-convex structure having a corrugated cross-sectional shape along the longitudinal direction is formed on one surface (surface on the skin surface side) of the absorbent body thus manufactured as a surface sheet that can be elongated in the longitudinal direction. A non-woven fabric (basis weight 30 g / m ² , pitch: 1.5 mm, concave groove thickness: 0.5 to 1.5 mm), partially on the other surface (surface on the non-skin surface side) As a back sheet that can be extended in the longitudinal direction, a liquid-impermeable polyethylene sheet having a bellows structure formed in a region corresponding to a part of the rear side region and the excretory opening corresponding region (height of the convex portion: 0.1 to Example 1 by pasting the periphery of the peripheral portion so as to have a predetermined plan view shape after pasting 0.3 mm, pitch: 1.7 mm, and thickness of concave groove portion: 0.5 to 1.5 mm) Absorbent articles (Sanitary napkins, product length (front edge and rear edge) Length of): 250 mm, length in the width direction of the absorbent main body portion: 150 mm) was prepared.

Example 2
The absorbent article of Example 2 was manufactured in the same manner as in Example 1 except that the product length of the absorbent body that was extensible in the longitudinal direction was 370 mm.

Comparative Example 1
The slit was not formed in the absorber, a liquid-permeable nonwoven fabric having no concavo-convex structure was used as the top sheet, and a liquid-impermeable polyethylene having no bellows structure formed on the back sheet An absorbent article of Comparative Example 1 was produced in the same manner as Example 1 except that the sheet was used.

Comparative Example 2
Five slits (width direction length: 8 mm) extending in the width direction are formed in the region corresponding to the rear side region of the absorber along the longitudinal direction, and the liquid permeation in which the concavo-convex structure is not formed as the top sheet The absorbent article of Comparative Example 2 was produced in the same manner as in Example 1, except that a non-woven fabric was used and a liquid-impermeable polyethylene sheet having no bellows structure formed on the back sheet was used. did.

Comparative Example 3
The slit part is not formed in the absorbent body, the absorbent body is disposed only in the excretion opening corresponding region of the absorbent main body part, the liquid-permeable nonwoven fabric in which the uneven structure is not formed as the top sheet, And the absorbent article of the comparative example 3 was manufactured like Example 2 except having used the liquid-impermeable polyethylene sheet in which the bellows structure was not formed as a back surface sheet.

For the manufactured absorbent articles of Examples 1 and 2 and Comparative Examples 1 to 3, the torsional torque values in the excretory opening corresponding area and the rear area are measured according to the following methods, and the absorbent article The feeling of wearing immediately after wearing and during wearing was evaluated, and the ease of twisting and the feeling of wearing in each region of the absorbent article were evaluated. The results are shown in Table 1.

<Measurement method of torsion torque value>
(1) The absorbent article to be measured is cut along a longitudinal central axis extending in the width direction (that is, a line that bisects the longitudinal length of the absorbent article), and the front half of the absorbent article And a measurement sample in the rear half of the absorbent article.
For each of the obtained measurement samples, the measurement sample in the front half of the absorbent article is called “excretion-corresponding area measurement sample”, and the sample in the rear half of the absorbent article is “excretion-corresponding area measurement sample”. “Sample” ”.
(2) An auxiliary line (a) along the longitudinal central axis extending in the width direction of the absorbent core and an auxiliary line (b) along the width central axis extending in the longitudinal direction of the absorbent core are provided on each measurement sample. Draw.
(3) As a measuring instrument, a torque tester (torque gauge) manufactured by Imada Co., Ltd. is prepared, and a pair of upper and lower chucks (width 85 mm) for holding a sample of the torque tester are as shown in the schematic diagram of FIG. Set the sample for measurement. At this time, the distance between the pair of upper and lower chucks (distance between chucks) is set to 70 mm, the auxiliary line (a) matches the intermediate position of the distance between the chucks, and the auxiliary line ( Set the measurement sample so that b) matches. In FIG. 9, reference numeral 100 indicates a measurement sample, and reference numeral C indicates a chuck.
(4) A certain tension is applied to the measurement sample by moving only the upper chuck so that the force applied to the measurement sample is 1.4 N as the holding force. Note that the initial state of the pair of upper and lower chucks is parallel to each other.
(5) From this tensioned state, the upper chuck is rotated in the horizontal direction at a speed of 30 rpm, and the torque value when the upper chuck is rotated 20 ° from the initial state is measured. The upper chuck is rotated up to 50 °.
(6) Next, the upper chuck is rotated at the same speed (30 rpm) in the opposite direction, and the torque value is measured when the upper chuck has passed the above initial state and further rotated 20 ° in the opposite direction. To do.
(7) The average value of the measured torque values is defined as the “torsion torque value” of the measurement sample.
In addition, this measurement is performed on 10 absorbent articles (that is, 10 excretory mouth corresponding area measurement samples and excretion mouth corresponding area measurement samples), and the average value is calculated by “twisting” the absorbent article. Torque value ".

<Evaluation method of wearing feeling>
(1) The absorbent articles of Examples 1 and 2 and Comparative Examples 1 to 3 were usually worn by 30 subjects using napkins and panty liners. The questionnaire was carried out according to the following evaluation criteria for wearing feeling, wearing feeling, and wearing comfort in each area of the mouth corresponding area) and the rear side area.
(2) The front region of the absorbent articles of Examples 1 and 2 and Comparative Examples 1 to 3 after being worn by the above-mentioned 30 subjects and after 3 hours from wearing (that is, during wearing) The questionnaire was carried out according to the following evaluation criteria for the wearing feeling, wearing feeling, and wearing comfort in each region of the (excretion mouth corresponding region) and the rear side region.
Furthermore, the average value of 30 subjects was obtained from the questionnaire results in each of the above-mentioned areas, and the average value was determined according to the following criteria for evaluation of wearing feeling. In addition, comprehensive evaluation in a table | surface determines the average value which totaled the average value in said each area | region with the following wearing feeling evaluation criteria.
(Evaluation criteria)
1 point: There is no foreign object feeling or uncomfortable feeling, and the wearing feeling is comfortable 2 points: There is almost no foreign object feeling or uncomfortable feeling, etc. 3 points: There is a little foreign object feeling or uncomfortable feeling, and there is a feeling of wearing It is normal 4 points: There is a feeling of foreign matter or discomfort, etc., and the feeling of wearing is not good 5 points: There is a feeling of foreign matter or discomfort, etc., and the feeling of wearing is uncomfortable (evaluation criteria for wearing feeling)
◎ (Comfortable): Average value is 2.0 or less ○ (Good): Average value is 2.1 or more, 3.0 or less △ (Normal): Average value is 3.1 or more, 4.0 or less × (Uncomfortable) : Average value is 4.1 or more

As shown in Table 1, the absorbent articles of Examples 1 and 2 had no leakage of excretory liquid and liquid return, and excellent wear feeling was obtained while maintaining high absorption performance as the absorbent article. . On the other hand, the absorbent articles of Comparative Examples 1 to 3 were all inferior in wearing feeling.

1 Sanitary napkin (absorbent article)
2 Absorption body part 21 Top sheet 22 Absorber 23 Back sheet 3, 3 'Flap part 4, 4' Adhesive part 5 Front side edge part 6 Rear side edge part

Claims

An absorbent article comprising a vertically long absorbent main body having a longitudinal direction and a width direction,
In the longitudinal direction, the absorption main body portion,
A front region located on the front side of the wearer when the absorbent article is worn;
A rear region located on the wearer's rear side when wearing the absorbent article; and
Located between the front side region and the rear side region, an excretion port corresponding region corresponding to the excretion port of the wearer when wearing the absorbent article,
Have
The torsional torque value of the rear side region is smaller than the torsional torque value of the excretory opening corresponding region and smaller than 8 mN;
The absorbent article.
The absorbent article according to claim 1, wherein the torsion torque value of the front side region is equal to or greater than the torsion torque value of the excretory opening corresponding region.
The absorption body part has a clothing fixing adhesive part on the non-skin surface side;
The absorbent article according to claim 1 or 2, wherein the clothes fixing adhesive portion is arranged such that a plurality of adhesives extending continuously or intermittently in the width direction are arranged along the longitudinal direction.
The absorption main body includes an extension region that can extend at least in the longitudinal direction in the rear side region, and extends across the widthwise central axis extending in the longitudinal direction of the absorption main body in the excretion port corresponding region. The absorbent article according to any one of claims 1 to 3, further comprising a low-stretch region having a lower stretch rate than the stretch region or non-stretch.
The absorption body portion has an extension region located on both sides in the longitudinal direction of the absorption body portion with respect to the low extension region and extending from the extension region of the rear side region in the excretory opening corresponding region. 4. The absorbent article according to 4.
The absorbent article according to claim 4 or 5, wherein the absorption main body portion has a low extension region extending from the low extension region of the excretory opening corresponding region in the front side region.
The absorption body portion has a low extension region located between the extension region of the rear side region and the rear side edge of the absorption main body portion in the rear side region. An absorbent article according to any one of the above.
The absorbent article according to any one of claims 4 to 7, wherein the absorbent main body portion has an elongation rate of 10% or more in the longitudinal direction of the elongated region.
The absorption main body portion includes a liquid-permeable top sheet positioned on the skin surface side in the thickness direction, a liquid-impermeable back sheet positioned on the non-skin surface side in the thickness direction, and each of these sheets. And an absorbent body that extends and extends from the front region to the rear region in the longitudinal direction,
The absorbent article according to any one of claims 4 to 8, wherein the absorbent body has a plurality of slit portions extending in a width direction of the absorbent main body portion in the elongated region.
The absorbent article according to claim 9, wherein the plurality of slit portions are arranged such that slit portions adjacent to each other in the longitudinal direction of the absorbent main body portion partially overlap in the longitudinal direction in plan view. .
The absorber has, in the elongated region, a slit portion existing region where the plurality of slit portions exist, and a slit portion non-existing region where no slit portion exists,
Furthermore, the slit part non-existing region intersects the first non-existing region extending in the front direction from one end to the other end in the width direction of the absorber in plan view, and A second non-existing region extending rearward from one end to the other end in the width direction of the absorber,
The absorbent article according to claim 9 or 10, wherein the slit portion existence region is present in a region surrounded by the first non-existence region and the second non-existence region.
The absorbent body includes an absorbent core containing an absorbent material, and at least one extensible sheet surrounding the absorbent core,
The absorbent article according to any one of claims 9 to 11, wherein the extensible sheet is extensible in at least the longitudinal direction.
The absorbent article according to claim 12, wherein the extensible sheet is made of a nonwoven fabric, and the nonwoven fabric includes fibers oriented along the width direction of the absorbent main body.
The absorbent article according to any one of claims 9 to 13, wherein the back sheet has a bellows structure extending in a longitudinal direction of the absorbent main body in the elongated region.