TWI695713B - Absorbent article - Google Patents

Abstract

The present invention is to provide an absorbent article having both excellent feeling of installation and high absorption performance.

The absorbent article (1) of the present invention is a longitudinally-long absorbent body portion (2) having a longitudinal direction and a broad-side direction, and has the following longitudinal direction: the absorbent article (1) is installed at the time of loading The front side area (A ₁ ) on the front side of the user, the rear side area (A ₃ ) on the rear side of the user when the absorbent article (1) is installed, and the front side area (A ₁ ) and the rear side area (A ₃ ), the discharge area corresponding area (A ₂ ) corresponding to the discharge port of the user when the absorbent article (1) is installed, and the rear side area (A ₃ ) The torsional torque value of is smaller than the torsional torque value of the aforementioned corresponding area (A ₂ ) of the discharge port, and is smaller than 8 mN.

Description

Absorbent article

The invention relates to an absorbent article such as sanitary napkins, sanitary pads, incontinence pads and the like.

Absorbent articles such as sanitary napkins, sanitary pads, incontinence pads, etc. are used by the user while touching the crotch of the user, and it is discussed that they will not cause a sense of discomfort and discomfort to the user And, it is easy to imitate the absorbent article of the wearer's body shape deformation (that is, excellent fit).

For such an absorbent article, for example, Patent Document 1 discloses an absorbent article provided with an absorbent layer, and the absorbent article is formed by the plurality of slits or local elongation of the absorbent layer Scalable area. The absorbent article disclosed in this Patent Document 1 can improve the physical fitness (ie, fit) of the user of the absorbent article.

[Previous Technical Literature] [Patent Literature]

[Patent Document 1] Japanese Special Publication No. 2007-523665

The absorbent article disclosed in Patent Document 1 does not have a stretchable area corresponding to the behavior of the wearer. The stretchable area is provided from the front side area of the absorbent article in the longitudinal direction to the longitudinal direction Rear side area. However, the absorbent article installed by the user is because when the user performs walking or other actions, the left and right directions of the user's buttocks are alternately moved to the rear of the longitudinal direction corresponding to the user's buttocks. The side area is urged in the twisting direction with the longitudinal direction of the absorbent article as an axis. Therefore, if the stretchable area is arranged as in the above-mentioned Patent Document 1, the force in the twisting direction in the rear side area is transmitted to the corresponding wearer The area of the discharge port (or contact), by which the area corresponding to the discharge port is deformed, may cause the wearer to have a sense of foreign body, violation, and damage the wearing feeling.

Also, as in the absorbent article disclosed in Patent Document 1, if the absorbent body is made extensible by slits or the like, the absorption performance of the absorbent body (particularly, the absorption performance of the extensible part by slits or the like) decreases Is common. However, since the absorbent article disclosed in Patent Document 1 does not specifically consider the absorption performance of the absorbent body, the absorption performance of the absorbent body cannot be fully exerted due to the behavior of the installer, the time of installation, etc. There may be concerns about leakage, backflow (rewetting) of excretory fluid discharged from the user.

Here, the present invention is to provide an excellent combination of Absorbent articles with high sensation and high absorption performance.

An absorbent article of an aspect (aspect 1) of the present invention is an absorbent article having a longitudinally-long absorbent body portion in a longitudinal direction and a broad-side direction, wherein the absorbent body portion is in the long The lateral direction has: a front region on the front side of the user when the absorbent article is installed, a rear region on the rear side of the user when the absorbent article is installed, and a front side on the front side Between the region and the rear side region, the discharge port corresponding region corresponding to the user's discharge port when the absorbent article is installed, the torsional torque value of the rear side region is smaller than that of the discharge port corresponding region , And the composition is smaller than 8mN.

The absorbent article of this aspect 1 is because the torsional moment value of the region on the rear side that becomes the region corresponding to the buttocks of the wearer when the absorbent body is configured for use becomes smaller (less than 8 mN) (that is, the aforementioned The rear area is configured to take the longitudinal direction of the absorbent article as the axis and is easily deformed in the torsional direction). Therefore, when the user of the absorbent article performs walking and other actions, the hips of the user alternately move left and right, even When a force to turn the absorbent article in the twisting direction is applied to the rear side region of the absorbent article about the longitudinal direction of the absorbent article (hereinafter, it may only be referred to as "twisting direction"). By deforming the rear side region in the twisting direction in accordance with the movement of the wearer, the state of the rear side region being closely attached to the skin surface of the wearer can be maintained (that is, an excellent wearing feeling can be obtained), and, The deformation of the rear side area cushions the above-mentioned torsional force, which is not easy to transmit To the corresponding area of the aforementioned drain.

On the other hand, the region corresponding to the discharge port in the absorption main body portion has a relatively larger torsional moment value than the region on the rear side. Therefore, the region corresponding to the discharge port with relatively little influence due to the action of the wearer, etc. is easy By maintaining the shape of the absorption body portion (that is, the shape of the absorption body portion is not easily deformed), it is possible to stably absorb excretory fluid discharged from the wearer for a long time.

As a result of the above, the absorbent article of this aspect 1 can achieve excellent adhesion to the wearer and high absorption performance.

Furthermore, in another aspect of the present invention (Aspect 2), in the absorbent article of the aspect 1, the absorbent body is a torsional torque value of the front side region and a torsional moment value of the corresponding region of the excretion port The same or above.

The absorbent article of this aspect 2 is that the torsional moment value in the front side region of the absorbent body portion is equal to or greater than the torsional moment value in the corresponding region of the discharge port (that is, the front side region corresponds to the discharge port The area is the same or it is easier to maintain the shape of the absorption body portion), because the shape of the absorption body portion (that is, the area where the shape of the absorption body portion is not easily deformed) can be more easily maintained. The front side region located on the front side of the wearer of the absorbent article is hardly affected by the wearer's movements, the expansion and contraction of the underwear, etc. The shape of the absorbent body portion can be maintained, and the absorbent body can be absorbed more stably and reliably Excretory fluid discharged by the user.

Furthermore, in the aspect of the present invention (form 3), before In the absorbent article of aspect 1 or 2, the absorbent main body portion has an adhesive portion for fixing clothing on the surface of the non-skin surface side, and the adhesive portion for fixing clothing is continuous in the widthwise direction. Or the intermittently extending adhesives are arranged in a plurality of rows along the aforementioned longitudinal direction.

The absorbent article of this aspect 3 has an adhesive portion for fixing clothing on the surface of the non-skin surface side of the absorbent body, and can be fixed to the wearer's underwear such as the user's underwear, so it can be more sure More stable absorption of excretory fluid discharged from the user. In addition, in the absorbent article of this aspect 3, the adhesive part for fixing clothing is the plurality of adhesives that extend continuously or intermittently in the widthwise direction along the lengthwise direction (i.e. , The adhesive part for fixing clothing is not continuous along the longitudinal direction), because the adhesive part for fixing clothing does not hinder the deformation in the torsional direction in the absorption body part, so even if the absorption The sex article is fixed to the wearer's underwear as described above, and the rear side region of the absorption body part is deformed in the above-mentioned torsional direction in accordance with the wearer's movements, the extension of the underwear, etc., and can maintain close contact with the wearer's The condition of the skin surface (that is, an excellent feeling of wearing can be obtained).

Furthermore, in another aspect of the present invention (Aspect 4), in the absorbent article of any one of the aspects 1 to 3, the absorbent body is included in the rear side region at least on the long side A direction-extendable region, the corresponding region of the excretion opening includes a central axis extending across the long-side direction of the long-side direction of the absorbent body, and has a ratio The aforementioned elongation region has a lower elongation rate or a non-elongation low elongation region.

The absorbent article of this aspect 4 is configured to include an elongated area in the rear side area that is configured to correspond to the hip area of the wearer during installation. Therefore, when the wearer performs an action such as walking, the aforementioned rear area The extension area in the body not only performs the above-mentioned torsional deformation, but also extends to the long-side direction by combining the user's movements (especially the left and right alternate movements in the hips) and the elongation of the underwear. The area on the back side of the skin is more accurately and tightly attached to the skin surface of the wearer (that is, a better fit feeling can be obtained).

On the other hand, since the region corresponding to the excretory opening constituting the aforementioned absorption body part includes a low-elongation region (that is, an area where the shape of the absorption body part is not easily deformed), there is relatively little influence due to the actions of the wearer, etc. In this area, it is easy to maintain the shape of the aforementioned absorption body portion, and it is possible to stably absorb excretory fluid discharged from the wearer for a long time.

Furthermore, in another aspect of the present invention (aspect 5), in the absorbent article of the aspect 4, the absorbent body portion has a position corresponding to the low-elongation region in the absorption in the region corresponding to the discharge port An elongated region extending from the elongated region of the rear side region on both sides of the main body in the longitudinal direction.

In the absorbent article of aspect 5, the absorbent body portion has an elongated area extending from the rear side area, and it is located in the longitudinal direction of the absorbent body portion with respect to the low-elongation area in the corresponding area of the discharge port Both sides of the body, even if the above-mentioned torsional force is transmitted from the area on the rear side of the absorption body part due to the action such as walking of the user Later, or when the groin portion of the user applies a force in the widthwise direction of the absorption body portion, such force can also be buffered by deformation of the elongated area in the corresponding area of the discharge port. As a result, in the absorbent article of aspect 5, in order to more easily maintain the shape of the central portion in the widthwise direction (that is, the low-elongation region in the region corresponding to the discharge port) in the region corresponding to the discharge port of the absorbent body, therefore, The excretion fluid discharged from the wearer can be absorbed more stably and surely.

Furthermore, in another aspect of the present invention (Aspect 6), in the absorbent article of the aspect 4 or 5, the absorbent body portion has the low area corresponding to the area corresponding to the discharge port in the front side area The low elongation region extends the elongation region.

In the absorbent article of this aspect 6, the low-elongation region of the absorbent body portion exists from the front-side region to the corresponding area of the excretory opening, because it is possible to more broadly ensure that the shape of the absorbent body portion can be easily maintained (that is, not easily deformed) Area, therefore, in the front side area where the influence of the action of the wearer, the elongation of the underwear, etc. is relatively small, it is easy to maintain the shape of the absorbent body portion, and it is possible to absorb the wearer more stably and reliably for a long time. The excreted fluid.

Furthermore, in another aspect of the present invention (aspect 7), in the absorbent article of any one of the aspects 4-6, the absorbent body portion has a position located behind the rear side region A low-elongation area between the aforementioned elongated area of the side area and the rear-side edge of the absorbent body portion.

In the absorbent article of this aspect 7, the aforementioned rear side area The area between the elongated area and the rear edge of the rear area is a portion that has relatively little influence due to the user's movement, the elongation of the underwear, etc. If a low-elongation area is arranged in such an area, it can be ensured Excellent strength and absorption performance as an absorbent article.

Furthermore, in another aspect of the present invention (aspect 8), in the absorbent article of any one of the aspects 4-7, the absorbent body portion is an elongation rate in the longitudinal direction of the elongated region More than 10%.

The absorbent article of this aspect 8 has an elongation of 10% or more in the longitudinal direction of the elongated region of the absorbent body portion. Since the elongated region is more easily deformed, the above-mentioned Aspects 4 to 7 The effect of the elongated area in the absorbent article (especially, "when the wearer performs an action such as walking, the aforementioned elongated area in the rear area matches the movement of the wearer (especially the hip (Alternating left and right movements), underwear extensions, etc., not only to perform the above-mentioned torsional deformation, but also to extend the deformation in the long-side direction, so that the rear side area of the absorbent body can be more accurately and tightly attached to the wearer Skin effect (that is, you can get a better feeling of wearing)".

Furthermore, in another aspect of the present invention (aspect 9), in the absorbent article of any one of the aspects 4-8, the absorbent body portion includes a liquid located on the skin surface side in the thickness direction A permeable top sheet, a liquid-impermeable back sheet on the non-skin surface side in the thickness direction, and an absorber are located between these sheets and extend from the front side region in the longitudinal direction to The aforementioned rear area,

The absorbent body is provided with the elongated region facing the absorbent body A plurality of thin slits extending in the widthwise direction of the portion.

In the absorbent article of this aspect 9, since the absorbent body constituting the absorbent body portion has a plurality of thin slit portions extending in the widthwise direction of the absorbent body portion in the elongated region, when the user performs a walking operation or the like In addition to the above-mentioned extension area, in combination with the user's movements (especially, alternate left and right movements in the buttocks), the extension of the underwear, etc., not only the above-mentioned deformation in the torsional direction, but also easy extension and deformation in the long-side direction. The area of the extended area of the part is more accurately and tightly adhered to the skin surface of the wearer.

Furthermore, the absorber, which accounts for most of the thickness of the absorbent body, has a plurality of slits, because the absorber can inherently impart excellent flexibility to the absorbent body (especially, flexibility in the thickness direction and the widthwise direction) Therefore, the absorbent article of aspect 9 including such an absorbent body can obtain better body suitability (ie, fit) as an absorbent article.

Furthermore, in another aspect of the present invention (aspect 10), in the absorbent article of the aspect 9, the plurality of slits are viewed from above in a plan view, and the slits adjacent to each other in the longitudinal direction of the absorbent body They are arranged in a partially repeated manner in the aforementioned longitudinal direction.

The absorbent article of this aspect 10 is because the plurality of slits in the elongated region are viewed in a plan view, and the slits adjacent to each other in the longitudinal direction of the absorbent main body are arranged in such a manner as to partially overlap each other in the longitudinal direction. (In other words, because the plural slit portions in the aforementioned elongated region are viewed in a plan view to abut against the slit portions in the longitudinal direction of the absorbent body portion Since they are not overlapped in the longitudinal direction at all), when the extended region is deformed in the torsional direction and the longitudinal direction due to the action of the wearer, etc., the absorbent body is less likely to be torn at the slit , Such a situation that is torn in the long-side direction.

Furthermore, in the absorbent body, the portion where the slit portion does not exist can exhibit a predetermined absorption performance, so if a plurality of slit portions are arranged in the elongated region as described above, the portion that can exhibit the predetermined absorption performance is in the aforementioned The elongated region is not offset, and even in this elongated region, it can exert a predetermined absorption performance.

Therefore, the absorbent article of the present aspect 10 can more surely exert the above-mentioned operational effects that can be achieved by the aforementioned elongated region, and the absorption performance in the elongated region can also be stably exhibited.

Furthermore, in another aspect of the present invention (aspect 11), in the absorbent article of the aspect 9 or 10, the absorber has the elongated region in the elongated region where the plurality of slits exist The region and the slitless region where the slit does not exist, and the slitless region does not include the first that extends from one end of the absorbent body in the widthwise direction toward the other end toward the front side when viewed from above An area and a second non-existence area that intersects the first non-existence area and extends from one end of the absorbent body in the lateral direction toward the other end toward the rear side, and the thin-slot existence area is present in the first The area surrounded by the non-existence area and the second non-existence area.

The absorbent article of this aspect 11 has the slit-free region where the absorber extends in the above-mentioned specific 2 directions in the aforementioned elongated region Area, while sufficiently ensuring the strength and absorption performance as an absorber, and having a slit existing area surrounded by the slit-free area, the extension range of the absorber can be further increased, so even if the user’s actions etc. When it is large, it can not only maintain good absorption performance, but also allow the aforementioned absorption body to be firmly attached to the skin surface of the wearer.

Furthermore, in another aspect of the present invention (aspect 12), in the absorbent article of any one of the aspects 9 to 11, the absorbent body includes an absorbent core containing an absorbent material and surrounding the absorbent At least one stretchable sheet of the core, the stretchable sheet can be stretched at least in the longitudinal direction.

In the absorbent article of this aspect 12, the stretchable sheet surrounding the absorbent core of the absorber is extensible at least in the longitudinal direction of the absorber body part, because the aforementioned absorber cooperates with the movement of the wearer (especially the left and right alternate movement in the buttocks) , The extension of the underwear, etc., and the structure is more easily deformed in the above-mentioned torsional direction and the long side direction, so that the elongated region of the absorbent body, especially the elongated region, can be more accurately and tightly adhered to the skin surface of the wearer. , It is possible to more reliably maintain the state where the elongated region is in close contact with the skin surface of the wearer (that is, to obtain an excellent feeling of wear more surely).

Furthermore, the absorber that accounts for the majority of the thickness of the absorbent body portion is easier to deform if constructed as described above, because the absorber can inherently impart more excellent flexibility to the absorbent body portion (especially in the thickness direction and the widthwise direction) Flexibility), therefore, as an absorbent article, better body fit (ie, fit) can be obtained.

Furthermore, in other aspects of the present invention (aspect 13), In the absorbent article of the aforementioned aspect 12, the stretchable sheet is composed of a nonwoven fabric including fibers oriented in the widthwise direction of the absorbent body.

The absorbent article of aspect 13 is an elongated sheet surrounding the absorbent core of the absorber because it is made of a specific nonwoven fabric, that is, a nonwoven fabric containing fibers oriented along the widthwise direction of the aforementioned absorbent body. Therefore, it is possible to not only ensure the extensibility of the elongated sheet in the longitudinal direction of the absorption body portion, but also allow the excretion fluid discharged from the user to spread in the widthwise direction by the constituent fibers of the elongated sheet While allowing the aforementioned absorbent core to absorb (that is, while ensuring elongation in the longitudinal direction, excellent absorption performance (absorption efficiency) can be obtained).

Furthermore, in another aspect of the present invention (aspect 14), in the absorbent article of any one of the aspects 9 to 13, the back sheet has a length in the elongated region toward the absorbent body Snake belly structure extending in the lateral direction.

Since the absorbent article of this aspect 14 has a bellows structure in the elongated region in the liquid-impermeable back sheet, the so-called liquid-impermeable property of the back sheet ensures the excretion of the user Leakage resistance can be more surely obtained by the stretchable bellows structure in the longitudinal direction of the stretched area.

In addition, as described above, if a plurality of slits are formed in the absorber, although the excrement discharged from the wearer easily reaches the back sheet through the slits, the absorbent article of this aspect 14 may be Let the excretory fluid reaching the back sheet extend along the wide side of the snake belly structure The extended groove portion spreads to the aforementioned widthwise direction. Thereby, even if the excretory fluid discharged from the wearer reaches the back sheet through the slit portion, the excretory fluid can be diffused in the widthwise direction of the back sheet while being allowed to pass from the non-skin surface side of the absorbent body Wide areas of the surface are absorbed.

In addition, if the back sheet has the above-mentioned bellows structure, flexibility, cushioning, etc. can be imparted in the thickness direction of the absorbent article, so that the feeling of installation of the absorbent article can be further improved.

In addition, if the back sheet has a bellows structure in the above-mentioned elongated area, it is easy to recognize that this area is an extensible portion. Therefore, it is easy to recognize that the absorbent article of this aspect 14 is extensible for the user, the user, etc. , Softness and other excellent product advantages.

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

1: Sanitary napkin (absorbent article) for physiology

2: Absorption body

21: Surface flakes

22: Absorber

23: back sheet

3. 3’: Wing

4, 4’: Adhesive part

5: Front edge

6: Rear side edge

FIG. 1 is a plan view of the sanitary napkin 1 according to an embodiment of the present invention when viewed from the surface sheet side in the thickness direction.

Fig. 2 is a plan view of the sanitary napkin 1 according to an embodiment of the present invention when viewed from the back sheet side in the thickness direction.

3, along the widthwise direction with the longitudinal direction of the sanitary napkin in Figure 1 1 which extends in a physiological embodiment of the present invention a central axis C _L of the cross-sectional end view.

FIG. 4 is a cross-sectional view taken along the line IV-IV of FIG. 1 in the sanitary napkin 1 according to an embodiment of the present invention.

FIG. 5 is a schematic perspective view showing a state in which the sanitary napkin 1 according to an embodiment of the present invention is twisted in the twisting direction with the longitudinal direction as the axis.

FIG. 6 is a plan view of the absorbent body 22 used in the sanitary napkin 1 according to an embodiment of the present invention in a state where it is not stretched (natural state).

7 is a plan view of the stretched state of the absorber 22 used in the sanitary napkin 1 according to an embodiment of the present invention.

FIG 8 is a broadside direction with the longitudinal direction of the sanitary napkin 1 in a stretched state in Figure 1 extending along the physiological aspect of the present invention in one embodiment a central axis C _L of the cross-sectional end view.

FIG. 9 is a schematic diagram showing a state in which a sample for measurement is attached to a torsion testing machine when measuring a torque value.

[Forms for carrying out the invention]

Hereinafter, a suitable embodiment of the absorbent article of the present invention will be described in detail with reference to the drawings. In addition, in this specification, if there is no particular attention, only the object placed on the horizontal surface in a state of being unfolded when viewed from the upper side in the vertical direction toward the thickness direction of the object (for example, absorbent article, absorbent body part, "Absorber, etc." is called "view from above".

If there is no particular emphasis on the various directions used in this specification, it is as follows.

In this specification, "broadside direction W" refers to "the direction in which the length of the vertically long object is short when viewed from above (short side direction)", and "longside direction L" refers to "the longitudinal direction when viewed from above" The direction of the length of the long object", "thickness direction T" refers to "the vertical direction relative to the object placed on the horizontal plane in the expanded state", the widthwise direction W and the long direction of these L and the thickness direction T are mutually orthogonal.

In addition, in this specification, "the absorbent article in the longitudinal direction L, when the user installs the absorbent article, the side that is relatively closer to the abdomen of the user" is referred to as the "absorbent article Front side", "in the longitudinal direction L of the absorbent article, when the user installs the absorbent article, the abdomen becomes relatively distant to the abdomen of the user (that is, relatively close to the back of the user "The other side" is called "the rear side of the absorbent article".

In addition, in this specification, the widthwise direction W of the "longitudinal object (eg, absorbent article, absorbent body portion, absorber, etc.) is relative to the widthwise direction extending in the longitudinal direction L C _L relative to a central axis of the proximal side, "referred to as" the widthwise direction of the inner side ", the widthwise direction W 'of the longitudinal length of the object with respect to the width direction of the central axis C _L relative The "distal side" is called "the outer side in the widthwise direction".

In addition, if there is no particular attention to this specification, in the thickness direction T of the absorbent article, the "relative proximal side with respect to the skin surface of the wearer when the absorbent article is installed" is referred to as the "skin surface side" , Will "absorb At the time of loading the article, the "distal side with respect to the skin surface of the wearer" is called "non-skin surface side".

FIG. 1 is a plan view of the sanitary napkin 1 according to an embodiment of the present invention as viewed from the surface sheet side in the thickness direction T. FIG. FIG. 2 is a plan view from the back sheet side in the thickness direction T when the physiological sanitary napkin 1 is unfolded. In addition, in FIGS. 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.

And, FIG. 3, is along the widthwise direction extending in the longitudinal direction of the center axis L 1 C _L sectional end view of the sanitary napkin 1. Fig. 4 is a cross-sectional view of the physiological sanitary napkin 1 taken along the line IV-IV of Fig. 1.

As shown in FIGS. 1 and 2, the sanitary napkin 1 of this embodiment is viewed from above, and the overall external shape has a long longitudinal shape in the longitudinal direction L. Furthermore, the central portion of the longitudinal direction L described above The outer edge on the front side has a shape that protrudes substantially trapezoidally toward the outer side in the lateral direction W. Specifically, the sanitary napkin 1 has a long-side direction and a wide-side direction in a plan view, and includes a vertically long absorption body portion 2 long in the long-side direction L, and a long-side direction L in the absorption body portion 2 The central part of the is located on the front side, a pair of substantially trapezoidal wings 3, 3'extending along both sides of the longitudinal direction L of the absorption body 2 and the pair of Each of the wing parts 3 and 3'is a pair of adhesive parts 4 and 4'for fixing clothes that extend in the longitudinal direction L.

The aforementioned absorbent body 2 is as shown in FIGS. 3 and 4, in The thickness direction T is provided with a liquid-permeable top sheet 21 located on the skin surface side, a liquid-impermeable back sheet 23 located on the non-skin surface side, positioned between these sheets, and having a widthwise direction W The absorber 22 of the plurality of slits S extending upward, and the surface of the back sheet 23 on the non-skin surface side, the adhesive 9 extending continuously or intermittently in the widthwise direction W to extend along the length Adhesive parts for fixing clothing are arranged in a manner (a so-called strip shape) in which a plurality of strips are arranged in the side direction L, and are configured to absorb and hold excretory fluid discharged from the wearer. On the other hand, the wings 3 and 3 are provided in the thickness direction T as shown in FIGS. 1, 2 and 4, and are located on the skin surface side and extend from the absorbent body 2 in the widthwise direction W The surface sheet 21, the back sheet 23 located on the non-skin surface side and extending from the absorbent body 2 in the widthwise direction W, and the surface disposed on the non-skin surface side of the back sheet 23 in the longitudinal direction L The extended adhesive parts 4, 4'for wearing clothes are fixed.

In addition, when the sanitary napkin 1 is installed, the absorbent body 2 is fixed to the wearer's wear by the adhesive part for fixing the clothing disposed on the non-skin surface side of the absorbent body 2 After the surface on the skin side of the clothing, a pair of wings 3, 3'are folded toward the non-skin surface side of the clothing, respectively, by placing the surface on the non-skin surface side of each of the wings 3, 3' The adhesive parts 4, 4'are fixed to the surface of the non-skin surface side of the aforementioned clothing for the user, so the surface of the pair of wing parts 3, 3'on the non-skin surface side is mounted on the sanitary napkin 1 When used, it becomes a face to face the user's skin.

The absorbent body portion 2 is, as shown in FIG. 1, provided with a plan view: the sanitary napkin 1 is equipped with a front end edge in the longitudinal direction L of the front side (abdominal side) of the wearer when installed. The portion 5; and the sanitary napkin 1 is installed at the rear end edge portion 6 in the longitudinal direction L on the rear side (back side) of the user, and furthermore, between these end portions In the longitudinal direction L, there are: a front area A ₁ where the sanitary napkin 1 is installed on the front side of the wearer, and a sanitary napkin 1 is installed on the rear side of the wearer The rear side area A ₃ , and the discharge port corresponding area A ₂ that is located between the front side area A ₁ and the rear side area A ₃ and corresponds to the user's discharge port during the installation of the sanitary napkin 1 . In addition, as shown in FIGS. 1 to 3, the absorber 22 is arranged so as to extend from the front side area A ₁ to the rear side area A ₃ .

Moreover, in the sanitary napkin 1 of the present embodiment, as shown in FIG. 1, the front end edge portion 5 and the rear end edge portion 6 of the absorption body portion 2 each have a substantially circular arc-shaped plan view shape Each of the above-mentioned regions A ₁ to A ₃ extends between the front end edge portion 5 and the rear end edge portion 6 in a strip shape to a substantially rectangular shape. In addition, in the absorbent article of the present invention, the above-mentioned shape of each end portion in the plan view and the state in which each region extends are not particularly limited, and any arbitrary shape and form in the plan view can be adopted.

Here, in this specification, "excretion port corresponding area" refers to: the area where the user installs the absorbent article, the area facing or in contact with the user's discharge port, the type of absorbent article, specifically , Is based on the type of urine, stool, menstrual fluid, etc. discharged from the user; the age and sex of the user; the position and area where the user's excretory port is opposed or abutting; suction The structure of the storage layer, etc., is appropriately set in accordance with the type of absorbent article.

In addition, the corresponding region of the excretory opening is usually at the approximate center of the longitudinal direction L of the absorbent article or the position on the front side (for example, the absorbent article is an absorbent article composed of an absorbent body portion and a wing portion) When viewed from above, the absorbent body has a narrowed portion that narrows toward the inner side in the center of the longitudinal direction L at the position where the wing portion overlaps the longitudinal direction in the absorbent body portion. When absorbing the absorbent article composed of the main body portion, the position corresponding to the narrowed portion of the absorbent body portion when viewed from above, and when the absorbent article is composed of an oblong absorbent body portion, span the wide side of the absorbent body portion The position of the central axis of the longitudinal direction extending in the direction W, etc.), although it is set to have a longitudinal length of about 1/3 or more of the total length of the longitudinal direction L of the absorbent article, and a total length of the absorbent article in the lateral direction W The length in the widthwise direction is about 1/3 or more, but, for example, when the absorbent article is a sanitary napkin for night use, the length in the longitudinal direction is also set to be less than the total length of the lengthwise direction L of the absorbent article 1/3 of cases.

Moreover, in the sanitary napkin 1 of the present embodiment, the torsional torque value of the rear side region A ₃ constituting the absorption main body portion 2 is smaller than the torsional moment value of the discharge port corresponding region A ₂ and is smaller than 8 mN .

Here, FIG. 5 is a schematic perspective view showing a state in which the sanitary napkin 1 according to an embodiment of the present invention is twisted in the twisting direction with the longitudinal direction L as the axis.

As in the sanitary napkin 1 of the present embodiment, if the torsion moment value constituting the rear side region A ₃ in the absorption body portion 2 becomes smaller (less than 8 mN) (that is, the rear side region A ₃ is shown in FIG. 5 It is easy to deform in the twisting direction with the longitudinal direction of the absorbent article as the axis), when the user of the sanitary napkin 1 (absorbent article) walks, etc., the user's hips alternately move left and right , a 2 is the rear region even when the absorbent body ₍₃₎ applies a force toward the torsional direction, by the operation of the rear-side region a with ₃ repackage the direction toward the torsional deformation of the rear region may be maintained a _{3 is} closely attached to the skin surface of the wearer (especially, the excretory opening of the wearer) (that is, an excellent wearing feeling can be obtained), and the deformation of the rear side area A ₃ cushions the above The force in the reverse direction is not easily transmitted to the aforementioned discharge port corresponding area A ₂ .

Hand region corresponding to the drain opening, the absorbent main body portion 2 as A ₂ constitutes the twisting moment than the value ₃ becomes relatively large rear region A, therefore, affect the operation repackage the like due to the relatively small drain The mouth-corresponding area A ₂ easily maintains the shape of the absorbent body 2 (that is, the shape of the absorbent body 2 is not easily deformed), and can stably absorb excretory fluid discharged from the wearer for a long time.

The "torque moment value" in this specification refers to the value of the torsional force when the longitudinal direction L of the longitudinally long object (that is, the absorption body portion) is twisted as the axis, and indicates that it is easy to take the longitudinal direction of the object as the axis An indicator of deformation in the twisting direction (ie, easy to twist).

This torsional torque value can be measured according to the <Method of Measuring Torsional Torque Value> described later.

In the absorbent article of the present invention, there is no particular limitation as long as the value of the torsional moment of the rear side region of the absorption body portion is smaller than 8 mN, but from the point that the above-mentioned effect can be exhibited more significantly, the twist The torque value is particularly smaller than 7mN. In addition, although the lower limit value of the torsional moment value of the rear side region is not particularly limited, the torsional moment value is preferably, for example, a value of 1 mN or more from the viewpoint of ensuring the strength of the absorption body portion and preventing twisting. .

Furthermore, in the absorbent article of the present invention, the absorption body portion preferably has a torsional moment value of the front side region equal to or greater than the torsional moment value of the corresponding region of the discharge port.

The torsional moment value in the front side region of the absorption body part is equal to or greater than the torsional moment value in the region corresponding to the discharge port (that is, if the front side region is the same as the discharge port corresponding region or it is easier to maintain the absorption body The shape of the part), it is possible to ensure that the shape of the absorbent body is easily maintained in a wider range, so that, in particular, in the front-side region located on the front side of the user of the absorbent article, it is hardly affected by the absorbent article. The shape of the absorbent body can be maintained under the influence of the movement of the wearer, the expansion and contraction of the underwear, etc., and the excretory fluid discharged from the wearer can be absorbed more stably and reliably.

In addition, the sanitary napkin 1 of the present embodiment is as described above, because the surface of the back sheet 23 of the absorption body 2 on the non-skin surface side is provided with a plurality of adhesive portions 9 arranged for fixing clothing. The adhesive part makes it possible to fix the sanitary napkin 1 to the wearer's underwear and use it, and it is possible to more reliably and stably absorb the excretory fluid discharged from the wearer. In the sanitary napkin 1, the adhesive 9 extending continuously or intermittently in the widthwise direction W is arranged in a plurality of parallel rows along the long-side direction L (ie, along the long-side direction) L discontinuously arranges the aforementioned adhesive part for fixing clothing) is arranged so that the aforementioned adhesive part for fixing clothing does not hinder the deformation in the torsional direction described above in the rear side region A ₃ of the absorption body 2, so even if When the sanitary napkin 1 is fixed to the wearer's underwear as described above, the rear side area A _{3 of the} absorbent body 2 can be deformed in the above-mentioned torsional direction in accordance with the wearer's movements, the extension of the underwear, etc. And maintain the state of being close to the wearer's skin.

In addition, in the present invention, the adhesive of the adhesive portion for fixing clothing is not particularly limited as long as it can fix the absorbent article to the wearer's clothing (underpants, etc.). For example, those containing styrene-based polymers can be used. Optional adhesive.

Furthermore, in the sanitary napkin 1 of the present embodiment, the absorbent body 2 is configured as shown in FIG. 1, and the rear area A ₃ includes an extension area E ₃ that can be extended at least in the longitudinal direction L. The discharge port corresponding area A ₂ includes a central axis C _{L that} extends across the long-side direction L of the absorbent body 2 and has a lower elongation than the extended area E ₃ or is made non-elongated Low elongation area N ₂ .

Here, in this specification, "elongation" means: when the object is pulled with a force of 5.0 N in two opposite directions in accordance with the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010 ,Do not It breaks, and is extended by 3% or more with respect to the length (100%) of the natural state (that is, the state before stretching) (that is, the length after stretching becomes 103% or more).

In addition, in this specification, "extendable" may refer to the method of pulling an object with a force of 5.0 N in two opposite directions in accordance with the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010. When it is not broken, and it is extended by more than 3% with respect to the length (100%) of the object in its natural state (that is, the state before stretching) (that is, the length after stretching becomes 103% or more Elongation). Here, in this specification, (extendable at least in the longitudinal direction) "elongation area" means: the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010, which is opposite to the longitudinal direction When the object is pulled with a force of 5.0N in the predetermined 2 directions, it will not break, and it will be extended by 3% or more with respect to the length (100%) of the region in the natural state (that is, the state before stretching) (100%) That is, the length of the extended region becomes an extended region of 103% or more).

In addition, in this specification, "elongation" may refer to when the object is pulled with a force of 5.0 N in two opposite directions in accordance with the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010. The increase rate (%) of the length of the object after being stretched (that is, the length after being stretched) relative to the length of the natural state (that is, the state before being stretched) can be specifically obtained from the following formula.

Elongation (%) = [(length of the object after elongation (mm))-(length of the object in its natural state (mm))]/(length of the object in its natural state (mm))×100

In addition, in this specification, "non-stretching" means: when the object is pulled with a force of 5.0 N in two opposite directions in accordance with the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010 , Will not break, and the length of the object in the natural state will not be extended by more than 3%. Therefore, "non-stretched" includes not only the case where the length of the object in the natural state is longer than 3%, but also the length of the object in the natural state (100%), which is less than 3%. Case (that is, the length after elongation becomes less than 103% "minimal elongation".

In addition, in this specification, the "low elongation region" refers to a region with a relatively low elongation relative to the "elongation region", and the low elongation region includes a non-elongation region in addition to an elongation region with a low relative elongation.

The sanitary napkin 1 of this embodiment includes the extension area E ₃ in the rear side area A ₃ constituting the area corresponding to the buttocks of the wearer during wear. Therefore, when the wearer performs walking or other actions, the aforementioned a ₃ in the rear region of the elongated zone E ₃ complex repackage the operation (in particular, alternating left and right hip operation), elongation and the like undergarment, not only the deformation of the torsional direction, but also by an elongation towards the longitudinal direction L The deformation can make the area A ₃ on the rear side of the absorption body 2 more closely adhere to the skin surface of the wearer.

Furthermore, since the discharge port corresponding region A ₂ constituting the aforementioned absorption body part 2 includes a low-elongation region N ₂ (that is, an area where the shape of the absorption body part 2 is not easily deformed), it is caused by the action of the user This area A ₂ , which has a relatively small influence, easily maintains the shape of the aforementioned absorption main body portion 2 and can more stably absorb excretory fluid discharged from the wearer for a long time.

In the absorbent article of the present invention, it is preferable that the absorbent body portion has an elongation in the longitudinal direction L of the elongated region of 10% or more.

If the elongation rate is 10% or more, the above-mentioned extended region is more easily deformed. Therefore, when the action effect of the above-mentioned extended region is performed, that is, when the user performs an action such as walking, the rear The extension area in the side area cooperates with the user's movements (especially the left and right alternating movements in the buttocks), the extension of the underwear, etc., not only the above-mentioned deformation in the torsional direction, but also the deformation in the long-side direction can be better and more The effect of allowing the area on the rear side of the absorption body portion to more closely adhere to the skin surface of the wearer is surely exerted.

In addition, if the above-mentioned elongation rate is high, the difference from the elongation rate of the underwear (particularly, shorts) to which the sanitary napkin is applied is reduced, so that the sanitary napkin can be made more suitable for the action of the wearer and the action of the underwear It is easy to connect, that is, it has the advantage that it can be made to have a good sense of pairing. In particular, the points of ease of attachment to shorts and ease of access to shorts are based on the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010, using 0.5N in the opposite predetermined 2 directions It is ideal to stretch the object by 3% or more when pulling it.

In addition, in the sanitary napkin 1 of the present embodiment, the low-elongation region N _{2 of the} discharge port corresponding region A ₂ is as shown in FIGS. 1, 2 and 4, and is provided with two linear recesses in a plan view P and P'are bottoms extending along the long side direction L of the absorbent body 2 on both sides of the central axis C _L in the width direction and having a higher density than other parts. In this embodiment, as shown in FIG. 1, the two linear recesses P and P′ extend from the front side area A ₁ to the rear side area A ₃ .

It is not necessary for the absorbent article of the present invention to have such a linear recess. If the absorbent article has such two linear recesses, even if the torsion direction described above is applied to the rear side region of the absorbent article due to the action of the user When the force of the user's groin absorbs the force in the widthwise direction W of the main body, the area corresponding to the excretory opening becomes the central part (that is, the two linear recesses) In the sandwiched region), it is easier to maintain the shape of the absorption body part by the rigidity of the rigid linear recesses, and it is possible to more stably and solidly absorb excretory fluid such as menstrual blood discharged from the wearer. In addition, in the region sandwiched by the two linear recesses, the absorbent material which will be described later in the body portion is absorbed by the two linear recesses, and it is not easy to move from this region, so it can be good And the absorption performance of the aforementioned absorption body portion (particularly, the region corresponding to the discharge port) is stably exerted.

Moreover, in this embodiment, the linear recesses P and P'are heated or non-heated embossing, etc., and the surface sheet 21, the absorber 22, and the back surface of the absorbent body 2 are formed by any pressing means. The laminate in which sheets 23 are stacked in this order can be formed by pressing in the thickness direction T from the surface of the surface sheet 21 on the skin side.

In the present invention, the shape of the linear recess in a plan view is not particularly limited, except for combining the curve like the above embodiment. In addition to the shape (refer to FIG. 1 ), any shape such as a linear shape, a dotted line shape, a zigzag shape, a geometric shape, a predetermined design shape, or the like can be used.

Further, in the aforementioned embodiment, the two linear concave portion P, P 'in a plan view, although both sides in the widthwise direction _L of the center axis C along a longitudinal direction of the absorbent main body portion 2 from the front of the L a ₁ across the side region to the rear region is arranged symmetrically about ₃ a, but, in view of the above-described effect, the linear concave portion, the long sides _L of the width direction of the central axis C at least in the region corresponding to the drain opening It only needs to be extended, for example, it may extend only in the region corresponding to the discharge port, or it may only extend from the region corresponding to the discharge port to the front side region or the rear side region. _L on both sides of the widthwise direction central axis C arranged in total three or more. If a plurality of linear recesses that increase the rigidity of such an absorption body are arranged, the shape of the absorption body can be more easily maintained.

In addition, the linear recess is arranged at a position that does not overlap the slit portion of the absorber described later in the thickness direction T from the viewpoint of maintaining the shape of the low-elongation region and ensuring the elongation of the elongation region (that is, not The position where it will overlap the elongated area) is ideal.

Hereinafter, the stretched region and the low stretched region of the sanitary napkin 1 of the present embodiment will be described in further detail.

The sanitary napkin 1 of this embodiment is configured as shown in FIG. 1, in which the absorption body portion 2 is located in the discharge port corresponding area A ₂ , and is located in the longitudinal direction of the absorption body portion 2 with respect to the low elongation area N ₂ . L on both sides, and having an elongated region E extends from the rear side of the elongated region a region ₃ E _{3 2.}

Such a structure is not an essential structure in the absorbent article of the present invention. However, if such an absorbent body 2 has a low elongation area N ₂ in the discharge port corresponding area A ₂ , it is located in the absorbent body When both sides of the longitudinal direction L of ₂ extend from the rear side region A ₃ to the extended region E ₂ , the above-mentioned torsional force is absorbed from the rear side region A _{3 of the main} body 2 even when the user walks or the like. When it is conveyed, or when the user's groin applies a force in the widthwise direction W of the absorption body 2, the force can also be buffered by deformation of the elongated area E ₂ in the corresponding area A ₂ of the excretion port Therefore, with the sanitary napkin 1 having such a structure, it is easier to maintain the central portion in the widthwise direction in the discharge port corresponding area A ₂ of the absorbent body 2 (that is, the low elongation area in the discharge port corresponding area A ₂ N ₂ ) shape. Thereby, the sanitary napkin 1 for physiology can absorb the excretion fluid discharged from the user more stably and surely.

In addition, as shown in FIG. 1, the sanitary napkin 1 of the present embodiment includes the low-elongation region N ₂ extending from the discharge port corresponding region A ₂ in the front region A _{1 of the} absorbent body ₂ . Low elongation area N ₁ .

Such a structure is not an essential structure in the absorbent article of the present invention. However, if the low-elongation region N _{2 of the} absorbent body 2 exists from the front side region A ₁ to the discharge port corresponding region A ₂ , it can be more The area where the shape of the absorbent body 2 is easily maintained (that is, not easily deformed) is broadly ensured. Therefore, the sanitary napkin 1 having such a structure is particularly affected by the movement of the wearer and the elongation of the underwear. The small front-side area A _{1 is} easy to maintain the shape of the absorption body portion 2 and can absorb the excretory fluid discharged from the wearer more stably and more reliably for a long time.

Furthermore, as shown in FIG. 1, the sanitary napkin 1 of the present embodiment constitutes the absorbent body portion 2 in the rear area A ₃ , and has the elongated area E ₃ and the elongate area E ₃ located in the rear area A ₃ . The low-elongation region N ₃ between the rear side edge portions 6 of the aforementioned absorbent body 2.

Such a structure is not necessary for the absorbent article of the present invention, but the area between the extended area E ₃ and the rear end edge portion 6 in the rear area A ₃ is the wearer If the low-elongation region N _{3 is} arranged in such a region where the effect due to the movement of the underwear or the elongation of the underwear is relatively small, excellent strength and absorption performance as a sanitary napkin (absorbent article) can be ensured.

In the present embodiment, each of the elongated regions E ₂ and E ₃ in the discharge port corresponding region A ₂ and the rear side region A ₃ of the absorbent body 2 is shown in FIGS. 1, 3 and 4. The predetermined region of the absorber 22 which is the thickest member among the various members of the absorber body 2 is provided with a plurality of slits extending through the absorber 22 in the thickness direction T and extending substantially linearly in the widthwise direction W S formed. In addition, in the absorbent article of the present invention, as long as the torsional moment value constituting the rear side region becomes smaller (less than 8 mN), the aspect is not limited to such an aspect, for example, it may be constituted by an extensible material A predetermined area of various members (for example, an absorber, etc.) constituting the aforementioned absorption body portion.

As in this embodiment, if a plurality of the absorbent body 22 in the region corresponding to the drain opening A ₂ and A ₃ in the rear region of each elongate area E _2, E ₃ in the widthwise direction W having the absorbent main body portion 2 extends The thin seam portion S, when the wearer performs actions such as walking, the aforementioned extension regions E ₂ and E ₃ cooperate with the wearer's actions (especially, the left and right alternate movements in the buttocks), the extension of the underwear, etc. The deformation in the torsional direction is also easily elongated and deformed in the longitudinal direction L, and the region including the elongated regions E ₂ and E ₃ of the absorbent body 2 can be more accurately and firmly adhered to the skin surface of the wearer.

Furthermore, the absorber 22, which accounts for most of the thickness of the absorbent body 2, has a plurality of slits S, because the absorber 22 can originally impart excellent flexibility (especially, in the thickness direction and the widthwise direction) to the absorbent body 2 Flexibility), therefore, the sanitary napkin 1 including such an absorber 22 can obtain better body fit (that is, fit) as a sanitary napkin (absorbent article).

Hereinafter, the absorber 22 provided with the plural slit portions S will be described in more detail with reference to the drawings.

6 is a plan view of a state in which the absorber 22 used by the sanitary napkin 1 of the present embodiment is not stretched (natural state), and FIG. 7 is a plan view of the stretched state of the absorber 22 used by the sanitary napkin 1 of the embodiment. . And, FIG. 8 is a broadside direction with the longitudinal direction of the sanitary napkin 1 in a stretched state in Figure 1 extending along the physiological aspect of the present embodiment a central axis C _L of the cross-sectional end view.

In the present embodiment, the absorber 22 is not particularly limited except that the plurality of slits S are formed, and any absorber known in the technical field of absorbent articles can be used. Just like this absorber Said, for example, at least one liquid-permeable coating sheet (sometimes called "core-clad sheet") of tissue paper or the like is surrounded by water-absorbent fibers and/or superabsorbent polymers including pulp Of absorbent materials, etc.

Among them, the absorber used in the absorbent article of the present invention includes an absorbent core containing the absorbent material, and at least one stretchable sheet that surrounds the absorbent core as the coating sheet, and the stretchable sheet is made of at least one The liquid-permeable sheet that is extensible in the longitudinal direction L of the absorbent body is ideally configured. In this way, the stretchable sheet surrounding the absorbent core of the absorbent body can be stretched at least in the longitudinal direction of the absorbent body portion, because the aforementioned absorbent body is easier to coordinate with the user's movements (especially the left and right alternate movements in the hips), the extension of the underwear, etc. It deforms in the above-mentioned torsional direction and long-side direction, so that the rear side region (especially the extended region) of the absorbent body part can be more closely adhered to the skin surface of the wearer. Furthermore, it can be more reliably maintained This state of the rear side is closely attached to the skin surface of the wearer (that is, an excellent feeling of wear can be obtained more surely).

Furthermore, the absorber that accounts for the majority of the thickness of the absorbent body portion is easier to deform if constructed as described above, because the absorber can inherently impart more excellent flexibility to the absorbent body portion (especially in the thickness direction and the widthwise direction) Flexibility), therefore, an absorbent article provided with such an absorber can be used as an absorbent article to obtain better body fit (that is, conformability).

In addition, the stretchable sheet used in the absorber is not particularly limited as long as it can be stretched in at least one direction (that is, the longitudinal direction L of the absorbent body). For example, although a nonwoven fabric (including tissue paper) can be used, Arbitrary liquid-permeable thin fabrics, porous resin sheets, etc. The sheet, however, is preferably composed of a non-woven fabric from the viewpoint of flexibility, water absorption, etc., and more preferably a non-woven fabric including fibers oriented in the widthwise direction of the absorbent body.

If the stretchable sheet surrounding the absorbent core of the absorber is composed of such a nonwoven fabric (that is, a nonwoven fabric containing fibers oriented along the widthwise direction of the aforementioned absorbent body portion), the stretchable sheet can be secured The extensibility of the absorbent body in the long-side direction also allows the excretory fluid discharged from the user to be absorbed in the absorbent core by the constituent fibers of the elongated sheet while diffusing in the widthwise direction (i.e. , Not only can ensure the elongation in the longitudinal direction, but also can obtain excellent absorption performance (absorption efficiency)).

In addition, in the absorbent article of the present invention, the thickness of the absorber is not particularly limited, and any thickness can be adopted in consideration of the type, use, and type of person to be installed of the absorbent article. Such a thickness is, for example, a thickness in the range of 0.1 mm to 10 mm, but from the viewpoint of thinning, flexibility, and adhesion of the absorbent article, it is in the range of 0.3 mm to 3 mm. The thickness is ideal.

In the absorber 22 of the present embodiment, as shown in FIG. 6, the plurality of slits S overlap with each other in the longitudinal direction L when the slits S adjacent to the longitudinal direction L of the absorption body 2 are viewed in a plan view. (In other words, the plurality of slit portions S are arranged in a plan view so that the slit portions S adjacent to the longitudinal direction L of the absorption body portion 2 are not overlapped in the longitudinal direction L at all).

If the plurality of thin slits S are arranged in this way, when the elongated regions E ₂ and E ₃ formed by the plurality of thin slits S are deformed in the torsional direction and the long-side direction L due to movement of the wearer, etc., the absorption The body 22 is torn at the slit portion S, and tearing in the longitudinal direction L is less likely to occur.

Also, in the absorber 22, the portion where the slit portion S does not exist can exhibit a predetermined absorption performance. Therefore, if a plurality of slit portions S are arranged in the elongated regions E ₂ and E ₃ as described above, the predetermined absorption can be exhibited The performance part is not biased in the aforementioned elongated regions E ₂ and E ₃ , and even in this region, the predetermined absorption performance can be exerted.

Therefore, the sanitary napkin 1 provided with such an absorber 22 can more surely exert the above-mentioned functions and effects that can be achieved by the aforementioned extended regions E ₂ and E ₃ , and the extended regions E ₂ and E ₃ The absorption performance can also be stabilized.

Furthermore, in the sanitary napkin 1 of the present embodiment, the plurality of slits S in the absorber 22 are as shown in FIG. 6 to have a predetermined number of slits in the elongated regions E ₂ and E ₃ The plurality of thin slits present regions A _S exist _, and the thin slit portions not present in the elongated regions E ₂ , E _{3 and the} thin slit portions S that are not present in the extended regions E _N are arranged so that the thin slit portions are not present in the region A _N is viewed from above, from one end (the left end in FIG. 6) of the absorber 22 in the widthwise direction to the other end (the right end in FIG. 6) toward the front side (upward in FIG. 6) (Side) the extended first non-existent region A _N1 and the first non-existent region A _N1 intersecting and extending from the end of the absorber 22 in the widthwise direction W (the left end in FIG. 6) toward the other end (FIG. The right end in 6) is constituted by a second non-existent area A _N2 extending toward the rear side (lower side in FIG. 6 ), and the aforementioned slit-existing area A _S exists in the first non-existent area A _The area surrounded by _N1 and the second non-existent area A _N2 , or extended by the first non-existent area A _N1 and the second non-existent area A _N2 and in the longitudinal direction L of the absorber 22 The area enclosed by the edges e ₁ and e _{2 in the} widthwise direction.

If a plurality of slit portions S are arranged in this manner, there is a slit-free region A _N (that is, the first non-existent region A _N1 and the second non-existent region A _N2 ) that extend the absorber 22 in the specific two directions described above. , Which can fully ensure the strength and absorption performance as an absorber, and has the slit existence area A _S enclosed by the first non-existence area A _N1 and the second non-existence area A _N2 , as shown in FIG. 7 and As shown in FIG. 8, since both the absorber 22 can be uniformly extended as well as the extension range of the absorber 22 can be made longer, the sanitary napkin 1 provided with such an absorber 22 can be used even by the user. When the movement is large, the force applied to the absorption body 2 can be sufficiently buffered, thereby maintaining good absorption performance and allowing the absorption body 2 to be firmly attached to the skin of the user .

In the absorbent article of the present invention, as long as the arrangement of the plurality of slits is such that the value of the torsional moment constituting the rear side region becomes smaller (less than 8 mN), it is not limited to the embodiment described above. For example, the plurality of thin slits may be arranged in a region where a predetermined number of thin slits are present in each of the areas surrounded by the thin slit non-existence area set in a checkerboard format, or may be arranged in a sandwich In the longitudinal direction L or the lateral direction W, a plurality of strip-shaped thin slit portions where no slits are present are provided.

Furthermore, the plurality of thin slits may be arranged in a predetermined pattern over the entire area of the elongated region. In such an arrangement, the entire length of the plurality of thin slits in the widthwise direction W of the absorber is not arranged at The line configuration is ideal. By arranging a plurality of thin slits in this manner, it is possible to prevent the plurality of thin slits arranged in a straight line from acting as a dotted line to cut the absorber and thereby breaking the absorber.

Further, in the sanitary napkin 1 of the present embodiment, as shown in FIG. 6 and the like, the slit portion S is formed as a substantially linear through hole extending in the widthwise direction W when viewed from above, but the present invention The shape of the absorbent article is not limited, and the slit portion may have any shape viewed from above as long as the effect of the present invention is not impaired. The shape of such a thin slit portion in a plan view includes, for example, a circular arc shape, a V shape, a wave shape, a zigzag shape, and the like.

In the sanitary napkin 1 of this embodiment, the length of the slit portion S extending in the widthwise direction W of the absorbent body portion 2 (that is, the widthwise length of the slit portion) only needs to constitute the twist of the rear side region The torque value becomes smaller (less than 8mN) and there is no particular limit, but it is ideally in the range of 3mm ~ 50mm, more preferably in the range of 5mm ~ 15mm. If the length of the slit portion is 3 mm or more, the elongated region of the absorption body portion can be more easily deformed in the above-mentioned torsional direction, and the aforementioned elongated region can be sufficiently elongated in the long-side direction L. Furthermore, the absorber can absorb The body part imparts moderate flexibility. Also, if the length of the slit portion is 50 mm or less, when the absorber receives a force from the outer side of the lateral direction W, etc., the slit opening is unlikely to break. In this case, good durability as an absorbent article can be ensured.

In the present invention, the means for forming a plurality of slits in the absorber is not particularly limited, and any cutting means can be used. For example, an absorber having a plurality of slits is to move the front body of the absorber manufactured by any manufacturing method toward the long side direction or the wide side direction of the front body by a conveying means such as a belt conveyor The conveyance can be manufactured by pressing a plurality of cutting blades provided on the peripheral surface of the rotating cutting roller against the upper surface of the precursor body and penetrating it. In addition, by appropriately adjusting the arrangement of the cutting blades of the cutting roller, a plurality of slits can be formed in the absorber in a predetermined arrangement form.

Next, in the sanitary napkin 1 of the present embodiment, a pair of substantially trapezoidal wings 3 and 3 ′ extending along both sides of the longitudinal direction L of the absorbent body 2 will be described in more detail. .

As described above, the pair of wings 3 and 3'are composed of the surface sheet 21 extending from the absorbent body 2 in the widthwise direction W and the sheet extending from the absorbent body 2 in the widthwise direction W The back sheet 23 is formed on the non-skin surface side surface of each wing portion 3, 3'(that is, the surface on the non-skin surface side of the back sheet 23) as shown in FIGS. 1, 2 and 4 It is provided with substantially rectangular adhesive parts 4 and 4'for fixing clothing extending in the longitudinal direction L.

Furthermore, in the sanitary napkin 1 of the present embodiment, the two end portions 7, 8, 7', and 8'extending in the longitudinal direction L of the pair of adhesive portions 4, 4'include a front side edge portion 5 of the first ends of the pair of the proximal side 7, 7 'of the first virtual straight line L _1, and comprising the rear with respect to the side end edge portion 6 at a proximal side of the pair The area between the second imaginary straight lines L ₂ of the second end portions 8 and 8 ′ of the area constitutes an area corresponding to the discharge port (or contact) of the user, that is, constitutes the area A ₂ corresponding to the discharge port.

Therefore, in the absorbent article of the present invention, the pair of adhesive portions of the aforementioned wings are considered in consideration of the type and use of the absorbent article; the type of person to be installed; the position of the discharge port; and the fixation to the wearing clothes Arbitrary size shapes such as are arranged on the surface of each wing portion on the non-skin surface side. In the case of the sanitary napkin 1 of the above-described embodiment, the pair of adhesive portions 4 and 4'of the wings 3 and 3'have, for example, a length in the longitudinal direction L in the range of 10 mm to 150 mm and wide The substantially rectangular shape having a length in the lateral direction W in the range of 5 mm to 50 mm is viewed in plan view, and is arranged on the non-skin surface side surface of each wing portion 3, 3 ′.

In addition, in the absorbent article of the present invention, the adhesive forming the adhesive part for fixing clothing in the pair of wings is not particularly limited, and is adhered to the adhesive part for fixing clothing in the absorbent body described above In the same manner, any adhesive agent including a styrene-based polymer or the like can be used.

In addition, in the sanitary napkin 1 of the present embodiment, the pair of wings 3 and 3'are as shown in FIGS. 1 and 4 and, when viewed from above, have the following: from the absorbent body 2 toward the wide side The top sheet 21 extending in the direction W and the back sheet 23 extending from the absorbent body 2 in the widthwise direction W constitute a pair of substantially trapezoidal top-view shapes. However, in the absorbent article of the present invention, The form of the aforementioned pair of wings is not limited to such a form, for example, the aforementioned pair of wings may be The viewing shape is formed by a shape other than the above-mentioned approximate trapezoidal shape (for example, rectangular shape, semi-elliptical shape, predetermined design shape, etc.), and may also be formed by a sheet-like member (i.e., with (The sheet-like member which is different from the front sheet and the back sheet constituting the main body).

In addition, such a pair of wings is not an essential constituent element of the absorbent article of the present invention. The absorbent article of the present invention may be configured not to have the aforementioned pair according to the type, use, etc. of the absorbent article Of the wings (ie, only by the absorbent body).

Hereinafter, in the sanitary napkin 1 of the present embodiment, the front sheet 21 and the back sheet 23 constituting the absorbent body 2 and the pair of wings 3 and 3'will be described in more detail.

In the sanitary napkin 1 of this embodiment, the surface sheet 21 is arranged on the skin surface side of the sanitary napkin 1 in the thickness direction T as shown in FIGS. 1, 3 and 4. The width-wise central axis C _L extending in the long-side direction L of 1 is composed of a liquid-permeable sheet member that can directly contact the skin surface of the user. The liquid-permeable sheet member constituting such a surface sheet 21 is not particularly limited, and any non-woven fabric such as hot-air non-woven fabric formed using cellulose fibers, thermoplastic resin fibers subjected to hydrophilization treatment, etc. can be suitably used. Wait.

Among them, it is desirable to use a sheet member as the surface sheet of the absorbent article of the present invention, and it is preferable to use a non-woven fabric that is stretchable in at least the longitudinal direction L in a region corresponding to at least the elongated region of the absorbent body. As such a nonwoven fabric, for example, a nonwoven fabric composed of extensible elastic fibers in a region corresponding to the elongated region of the absorbent body portion may be mentioned. The cloth, the non-woven fabric composed of the stretchable uneven structure described later, and the region corresponding to the stretched area of the aforementioned absorbent body portion.

By using this type of non-woven fabric for the surface sheet, the extended area of the absorption body portion is more easily deformed according to the action of the wearer, so that the area can be more firmly adhered to the skin surface of the wearer, and The force in the twisting direction applied to the area on the rear side of the absorbent article becomes less likely to be transmitted to the area corresponding to the excretion opening.

In addition, in the absorbent article of the present invention, it is desirable that the top sheet has higher extensibility than the back sheet described later (that is, it can be stretched with a smaller force than the back sheet). If the surface sheet has higher extensibility than the back sheet, the surface sheet shrinks more easily than the back sheet during shrinkage after elongation and deformation. Therefore, the absorbent article is easily deformed into a surface recessed structure on the surface sheet side ( The so-called cup-shaped structure), it is easy to make it follow the shape of the wearer's body, the shape of underwear (especially, shorts).

In addition, in the absorbent article of the present invention, the size and shape of the surface sheet are not particularly limited as long as they can cover the entire surface of the skin side surface of the absorber disposed on the non-skin surface side of the surface sheet. The size, sex, use, etc. of the person to whom the article is loaded can be any size or shape. In addition, there is no particular limitation on the thickness of the surface sheet. For example, a thickness in the range of 0.001 mm to 5.0 mm can be used, but from the viewpoint of liquid permeability, cushioning property, skin touch, etc., it is desirable In the range of 0.01mm~3.0mm, more ideally in the range of 0.1mm~1.0mm.

In the absorbent article of the present invention, the structure of the absorbent article is not particularly limited. For example, although both sides of the skin side and the non-skin side have a substantially flat structure, the surface sheet corresponds to the absorbent body It is desirable that at least the region of the aforementioned elongated region has an extensible uneven structure. Examples of such an extensible concave-convex structure include, in plan view, a plurality of linear convex portions extending in the widthwise direction W of the surface sheet and arranged at a predetermined interval in the longitudinal direction L, and The cross-sectional shape along the long-side direction L formed by a plurality of linear concave grooves extending between the adjacent convex strips and extending in the widthwise direction W of the surface sheet becomes a substantially wave shape (that is, The inside of the convex strip part becomes a hollow concave-convex structure. Here, the convex strip portion has a structure that the surface of the surface sheet on the skin surface side protrudes toward the skin surface side in the thickness direction T of the surface sheet, and the concave groove portion has the surface sheet in the thickness direction T of the surface sheet The structure in which the surface on the skin side is depressed toward the non-skin side.

If a non-woven fabric having such an extensible uneven structure is used for the surface sheet of the absorbent article, the extended area of the absorbent body portion is more easily deformed according to the action of the wearer, so that the area can be more firmly adhered to The state of the skin surface of the user (that is, the feeling of the absorbent article can be further improved), and the above-mentioned torsional force applied to the area behind the absorbent article becomes less likely to be transmitted to The corresponding area of the aforementioned drain.

In addition, in the above-mentioned extensible concave-convex structure, the height of the convex stripe portion (that is, the horizontal plane including the top of the convex stripe portion and the The distance between the bottom and the horizontal plane) is not particularly limited, for example, although a height in the range of 0.1 mm to 1.2 mm can be used, from the viewpoint of elongation, skin touch, cushioning, etc., it is preferably 0.2 mm Within the range of ~1.0mm, more preferably within the range of 0.4mm~0.8mm.

In addition, the height of the protruding portion is a laser displacement meter (for example, a high-precision 2-dimensional laser displacement meter manufactured by Keynes Co., Ltd. LJ-G series (type: LJ-G030)), which can be contactless as follows Take measurements. Place a sample with a 100mm×100mm surface sheet cut on a horizontal measuring table, measure the displacement from the measuring table with a laser displacement meter for five different convex portions, and average the 5 measured values The thickness (mm) of the ridge portion. Similarly, the displacement from the measurement table was measured with a laser displacement meter for five different grooves, and the average value of the five measured values was taken as the thickness (mm) of the groove. The height (mm) of the convex stripe portion is calculated from the difference between the thickness (mm) of the convex stripe portion and the thickness (mm) of the concave groove portion.

In addition, the pitch of the above-mentioned extensible concave-convex structure (that is, the interval (mm) between the top centers (edge lines) of two adjacent convex portions is not particularly limited. For example, 0.5 The pitch in the range of mm to 5.0 mm is preferably in the range of 1.0 mm to 4.0 mm from the viewpoint of elongation, skin touch, and the like.

In addition, the pitch of the concave-convex structure is based on a top view photograph or a top view image of the surface sheet in a non-pressurized state, and the distance (mm) between the top centers (edge lines) of two adjacent convex strips can be measured .

In the absorbent article of the present invention, the extensible uneven structure that can be used as the structure of the surface sheet is not limited to the above-mentioned aspect, for example It can be adopted that the convex and concave portions and concave groove portions of the above-mentioned uneven structure are partially viewed in a direction other than the widthwise direction W of the absorbent article (for example, a direction inclined from the widthwise direction W of the absorbent article by a predetermined angle, etc.) An extended aspect, an aspect that allows at least part of the direction to change (eg, wavy, saw-toothed, etc.); an aspect that extends at the same time; at least partially discontinuously in the widthwise direction W of the absorbent article (ie, intermittent ) An extended state; at least a part of the interval between two adjacent convex parts is not a certain state; such a plurality of convex parts (ridges disclosed by Japanese Patent No. 5929349 and Japanese Patent No. 5929326 Part), a configuration formed by a groove portion having a plurality of concave portions; or a configuration in which two or more configurations of the same configuration are arbitrarily combined, etc.

By appropriately setting the direction and shape of the extension of the convex and concave grooves, the shape of the deformation of the elongated region that absorbs the main body can be adjusted arbitrarily, and a variety of action modes for the wearer can be realized. design.

The method of forming the above-mentioned extensible uneven structure on the surface sheet is not particularly limited. For example, a method of forming an uneven structure with a cross-sectional waveform by continuously blowing a gas (generally a gas) on the fiber web can be used, and a vacuum forming method can be used. ; Any method such as a method of rolling using gears; a method of using thermal elongation of heat-extensible fibers and/or a method of thermal shrinkage of heat-shrinkable fibers.

In the sanitary napkin 1 of the present embodiment, the back sheet 23 is made of a liquid-impermeable sheet member that prevents leakage of excretory fluid such as menstrual blood discharged from the wearer as shown in FIGS. 1 to 4. The structure is arranged on the non-skin surface side in the thickness direction T of the sanitary napkin 1 on the widthwise central axis C _L extending in the longitudinal direction L of the sanitary napkin 1. The liquid-impermeable sheet member constituting such back sheet 23 is not particularly limited, and for example, a resin film such as polyethylene or polypropylene having air permeability, and a laminate in which a non-woven fabric is bonded to the resin film can be suitably used Wait.

Among them, the sheet member used as the back sheet of the absorbent article of the present invention is preferably a sheet member that uses liquid impermeability, and it is at least a long region corresponding to the elongated region that constitutes the absorbent body at least The side direction L is extensible. Examples of such a sheet member include: a sheet member composed of an area of at least the elongated region corresponding to the absorbent body portion by an extensible elastic material, and a structure corresponding to the absorbent body by an extensible accordion structure described later The sheet member and the like in the region of the extended region of the portion.

Such a sheet member is used for the back sheet, because both the liquid-impermeability characteristic of the so-called sheet member can be used to ensure leak-proofness to the user's excretion fluid, and the above-mentioned extensible structure (snake belly structure, etc.) ) The extended area of the absorbent body portion is more easily deformed according to the action of the wearer, so that the area can be more firmly adhered to the skin surface of the wearer (that is, the absorbent article can be installed The sense of use is further improved), and the above-mentioned torsional force applied to the rear side region of the absorbent article becomes less likely to be transmitted to the corresponding region of the excretion opening.

In addition, in the absorbent article of the present invention, the size and shape of the back sheet as long as it can prevent leakage of excretory fluid discharged from the user, There is no particular restriction, and any size and shape can be adopted in accordance with the size and sex of the person to whom the absorbent article is installed; Furthermore, there is no particular limitation on the thickness of the back sheet. For example, although a thickness in the range of 0.001 mm to 5.0 mm can be used, from the viewpoint of liquid impermeability, flexibility, air permeability, etc., it is desirable to Within the range of 0.003mm to 3.0mm, more preferably within the range of 0.01mm to 1.0mm.

In addition, in the absorbent article of the present invention, the structure of the back sheet is not particularly limited. For example, although both sides of the skin side and the non-skin side may have a substantially flat structure, the back sheet is as follows: The back sheet 23 of the sanitary napkin 1 of this embodiment shown in FIGS. 2 and 3 has a bellows structure extending along the longitudinal direction L of the absorbent body at least in the elongated region of the absorbent body ideal.

In the sanitary napkin 1 of the present embodiment, the bellows structure B formed on the back sheet 23 is, as shown in FIG. 2 and FIG. 3, as viewed in a plan view, extending in the widthwise direction W of the back sheet 23. In addition, a plurality of linear convex portions B ₁ arranged at a predetermined interval in the longitudinal direction L and a plurality of adjacent convex portions B ₁ extending in the widthwise direction W of the back sheet 23 The linear groove B ₂ is formed, and the cross-sectional shape along the longitudinal direction L becomes a substantially zigzag shape. Here, the convex portion B ₁ has a structure in which the surface surface side of the back sheet 23 protrudes toward the skin surface side in the thickness direction T of the back sheet 23, and the concave groove portion B ₂ in the thickness direction T of the back sheet 23 It has a structure in which the surface of the back sheet 23 on the skin surface side is recessed toward the non-skin surface side.

In this way, if the liquid-impermeable back sheet 23 has a bellows structure B in the extended region of the absorbent body 2, the liquid impermeability of the back sheet 23 can ensure the excretion of the user Leakproofness is also possible, and the extendable bellows structure B can more surely obtain the elongation in the longitudinal direction L of the extended region of the absorbent body 2, so that the region can be more securely attached to the user The condition of the skin surface (that is, the feeling of the absorbent article can be further improved), and the above-mentioned torsional force applied to the area behind the absorbent article becomes less likely to be transmitted to the excretion opening Corresponding area.

In addition, in the case of the present embodiment where the plurality of slits S described above are formed in the absorber 22, in general, although excretory fluid such as menstrual blood discharged from the wearer easily reaches the back sheet 23 through the slits S However, if the above-mentioned corrugated structure B is formed on the back sheet 23, the excretory fluid reaching the back sheet 23 can be allowed to extend in the widthwise direction W along the groove B ₂ extending in the widthwise direction of the accordion structure B Therefore, even if the excretory fluid discharged from the wearer reaches the back sheet 23 through the slit portion S, the excretory fluid can be diffused in the widthwise direction W of the back sheet 23 or from the absorber 22 Absorb the wide range of non-skin side surfaces.

In addition, if the back sheet 23 has the bellows structure B as described above, since flexibility, cushioning, etc. can be imparted in the thickness direction T of the absorbent article, the feeling of wearing of the absorbent article can be further improved.

Also, if the back sheet 23 is in the extended region of the absorption body 2 Since it has a bellows structure B, it is easy to recognize that this area is an extensible portion. Therefore, it is particularly easy for users, users, etc. to recognize that the absorbent article of the present invention is extensible, conformable, flexible, etc. Advantages of excellent products.

In the above-mentioned snake belly structure, the height of the convex part (that is, the distance between the horizontal plane including the top of the convex part and the horizontal plane including the bottom (the deepest part) of the groove part) is not particularly limited, for example, although 0.1 mm~ The height within the range of 1.2 mm, however, from the viewpoint of elongation, cushioning properties, liquid diffusibility, etc., it is preferably within the range of 0.2 mm to 1.0 mm, and more preferably within the range of 0.4 mm to 0.8 mm.

In addition, the height of the convex portion can be measured in the same manner as the height of the convex strip portion of the extensible uneven structure in the above-mentioned surface sheet.

In addition, there is no particular limitation on the pitch of the above-mentioned snake-belt structure (that is, the distance (mm) between the centers (ridges) of the tops of two adjacent convex portions). For example, 0.5 mm to 5.0 mm can be used. From the viewpoint of elongation, cushioning properties, liquid diffusibility, etc., the pitch in the range of φ is preferably in the range of 1.0 mm to 4.0 mm.

In addition, the pitch of this bellows structure is based on a top view photograph or a top view image of the back sheet in a non-pressurized state, and the distance (mm) between the top centers (ridge lines) of two adjacent convex portions can be measured.

In the absorbent article of the present invention, the bellows structure that can be used as the structure of the back sheet is not limited to the above-mentioned aspect, and for example, the convex portion and the groove portion of the bellows structure described above can be adopted, as viewed from above, at least partially toward the absorbent article. Directions other than the broadside direction W (for example, from absorbent The widthwise direction of the product W is the direction of tilting the predetermined angle, etc.) the state of extension, the state of being extended while allowing at least part of the direction to change (eg, wavy, zigzag, etc.); at least part of the width of the absorbent article Discontinuities (that is, intermittent) extending in the side direction W; at least some of the adjacent two convex portions are not in a certain state; or more than two states of the same state Like any combination of appearances.

In this way, by appropriately setting the direction and form of the extension of the convex portion and the groove portion, the shape of the deformation of the elongated region of the absorption body portion can be arbitrarily adjusted, and a product design corresponding to a variety of action patterns of the wearer can be realized.

The method of forming the above-mentioned snake-belt structure on the back sheet is not particularly limited, and for example, any method such as a method of forming by vacuum, a method of rolling by gears, or the like can be used.

Furthermore, in the absorbent article of the present invention, the structure of the low-elongation region of the back sheet is not particularly limited, but the back sheet is the sanitary napkin of the present embodiment shown in FIGS. 2 and 3. The back sheet 23 of 1 preferably has a substantially flat structure on both the skin surface side and the non-skin surface side of the low-elongation region of the absorbent body.

If the back sheet has a substantially flat structure in the low-elongation region of the absorbent body (particularly, at least the low-elongation region in the corresponding region of the discharge port) (that is, it does not have an element that can be a starting point for bending), because It is easier to maintain the shape of the body portion in the low-elongation region, so that the excretory fluid discharged from the user can be stably lowered.

In addition, in the sanitary napkin 1 of this embodiment, the upper The front sheet 21 and the back sheet 23 described above are formed by bonding the absorber 22 between the outer peripheral edges of each sheet by any bonding means such as adhesive, heat sealing, ultrasonic bonding, etc. .

In the present invention, the structure of the absorbent article is not limited to the above-mentioned embodiments, and for example, an auxiliary sheet for diffusing excretory fluid may be provided between the top sheet and the absorber and/or between the absorber and the back sheet.

In this way, the absorbent article of the present invention is not limited by the above-mentioned embodiments, and can be appropriately combined, modified, etc. within a range that does not deviate from the object and purpose of the present invention.

In addition, the present invention is applicable to various absorbent articles such as sanitary pads, (light) incontinence pads, etc., in addition to the sanitary napkins of the embodiments described above. In addition, in this specification, the ordinal numbers such as "first" and "second" are used to distinguish the items to which the ordinal number is assigned, and do not mean the order, priority, importance, etc. of the items.

[Examples]

Hereinafter, although the examples and comparative examples illustrate the present invention more specifically, the present invention is not limited to such examples.

Example 1

Mix pulp (base volume: 150±50g/m ² ) and super absorbent polymer (base volume: 30±10g/m ² ), and supply it to the recess for molding of the suction tube to obtain 220mm×70mm×5mm (long direction) Absorbent core with dimensions of length × length in the lateral direction × thickness).

Two nonwoven fabrics (skin side: base 25g/m ² hot air nonwoven fabric, non-skin side: base 10g/m ² SMS non-woven fabric) and one stretchable sheet (the base sheet is 35g/m ² and the stretchable sheet with a width of 70mm is placed behind the wings of the non-skin surface side of the absorber and from the back of the absorber The position of 10 mm from the side edge to the front side) was coated with the obtained absorbent core to obtain a precursor of the absorber.

Next, the obtained precursor of the absorber is pressed with a hydraulic press, whereby the thickness of the precursor of the absorber is adjusted to 2 to 4 mm, and the precursor of the absorber is aligned with the longitudinal direction and the transport direction of the precursor It is conveyed in a crosswise manner (so-called lateral flow), and the cutting blades provided on the peripheral surface of the cutting roller are formed through the precursor to form a plurality of slits, thereby making it extensible in the longitudinal direction The absorber (basic volume 150±50g/m ² (long-side direction) 220mm×(wide-side direction) 70mm×(thickness) 2~3mm). In addition, the pattern (number of arrangement positions of the slits) and the number of slits provided in the absorber are the same as the absorber 22 shown in FIG. 6, and the widthwise length of the slits is 8 mm.

A liquid-permeable non-woven fabric (basic amount 30g/m ² , pitch : 1.5mm, the thickness of the groove: 0.5~1.5mm) As a surface sheet that can be stretched in the longitudinal direction, it is pasted on the other side (the surface on the non-skin side) to the area corresponding to the rear side and the area corresponding to the excretion A part of the area is formed with a liquid-impermeable polyethylene sheet with a bellows structure (the height of the convex part: 0.1 to 0.3 mm, the pitch: 1.7 mm, the thickness of the concave groove part: 0.5 to 1.5 mm) as a part that can be extended in the longitudinal direction After cutting the back sheet, the absorbent article of Example 1 (the product length of the sanitary napkin (between the front edge and the back edge Length): 250 mm, the length of the absorbent body in the width direction: 150 mm).

Example 2

The absorbent article that is extensible in the longitudinal direction is the same as Example 1 except that the product length is 370 mm, and the absorbent article of Example 2 is manufactured.

Comparative example 1

It is the same as Example 1 except that no slits are formed in the absorber, a liquid-permeable nonwoven fabric not formed with an uneven structure is used as a surface sheet, and a liquid-impermeable polyethylene sheet which is not formed with an accordion structure is used as a back sheet. The absorbent article of Comparative Example 1 was manufactured.

Comparative example 2

In addition to forming five thin slits (length in the widthwise direction: 8 mm) extending in the widthwise direction along the longitudinal direction in the region corresponding to the rear side region of the absorber, a liquid-permeable non-woven fabric with no uneven structure formed is used as The surface sheet and the liquid-impermeable polyethylene sheet that does not have a bellows structure were used as the back sheet, and the absorbent article of Comparative Example 2 was produced in the same manner as in Example 1.

Comparative Example 3

In addition to forming no slits in the absorber, arranging the absorber only in the region corresponding to the discharge port of the absorber body, using a liquid-permeable non-woven fabric that does not have an uneven structure as the surface sheet, and using a liquid-impermeability that does not have a snake belly structure The polyethylene sheet used is the absorbent article of Comparative Example 3 as in Example 2 except that the back sheet is used.

With respect to the manufactured absorbent articles of Examples 1, 2 and Comparative Examples 1 to 3, the torsional moment values in the areas corresponding to the excretory port and the areas on the rear side were measured and absorbed in accordance with the methods shown below. Evaluation of the feeling of wearing after and during the installation of the sexual article, and evaluation of easy twisting and feeling of wearing in each region of the absorbent article. Table 1 shows the results.

<Measurement method of torque value>

(1) Cut the absorbent article to be measured along the central axis of the long-side direction extending in the widthwise direction (that is, the line that bisects the longitudinal length of the absorbent article) to obtain the front half of the absorbent article The measurement sample and the half of the measurement sample on the rear side of the absorbent article.

For each measurement sample obtained, the measurement sample on the front half of the absorbent article is used as the "sample for measurement of the corresponding area of the discharge port", and the sample on the rear half of the absorbent article is measured as the "measurement of the corresponding area of the discharge port. Sample for measurement".

(2) Draw the auxiliary line (a) along the central axis in the long-side direction extending toward the broad-side direction of the absorbent core and the central axis in the wide-side direction extending along the long-side direction of the absorbent core in each measurement sample Auxiliary line (b).

(3) Prepare a torsion testing machine (torque meter) manufactured by Mengda Co., Ltd. as a measuring machine, and set the measurement sample in the upper and lower pair of jigs for holding the sample of the torsion testing machine as shown in the schematic diagram of FIG. 9. (85mm wide). At this time, the interval (distance between the clamps) of the pair of upper and lower clamps is set at 70 mm, the auxiliary line (a) and the intermediate position of the distance between the clamps are matched, and the auxiliary line (b) and the width of the clamp are made Set the sample for measurement so that the center position in the lateral direction matches. In addition, in FIG. 9, symbol 100 represents a sample for measurement, and symbol C represents a jig.

(4) The force applied to the measurement sample as a holding force is 1.4 N so that only the upper clamp is moved, and a certain tension is applied to the measurement sample. In addition, the initial state of the pair of upper and lower clamps is parallel to each other.

(5) From the state where the tension is applied, the upper clamp is rotated horizontally at a speed of 30 rpm, and the torque value when the upper clamp is rotated by 20° from the initial state is measured. In addition, the rotation of the upper clamp is performed up to 50°.

(6) Next, the upper jig is rotated in the opposite direction at the same speed (30 rpm). When the upper jig exceeds the above-mentioned initial state, the torque value when rotating in the opposite direction by 20° is further measured.

(7) Use the average value of each measured torque value as a sample for measurement "Torsion torque value".

In addition, this measurement was performed on 10 absorbent articles (that is, 10 samples for measuring the area corresponding to the excretory opening and the samples for measuring the area corresponding to the excretion opening), and the average value was used as the absorbent article. "Torque torque value".

<Evaluation method of feeling of use>

(1) For the test subjects of 30 people who normally use sanitary napkins and sanitary pads, install the absorbent articles of Examples 1, 2 and Comparative Examples 1 to 3, and apply them to the area on the front side according to the following evaluation criteria. The questionnaire was conducted on the feeling of installation, feeling of use, and comfort of use in each area (exhaust port corresponding area) and the area on the rear side.

(2) The above-mentioned 30-person test subjects used the absorbent articles of Examples 1, 2 and Comparative Examples 1 to 3 for the use according to the following evaluation criteria and after 3 hours passed (that is, during the use) The questionnaire was implemented for the feeling of installation, feeling of use, and comfort of use in each of the front area (corresponding area of the excretory opening) and the back area.

Furthermore, the average value of 30 subjects was obtained from the results of the questionnaires in the above-mentioned areas, and the average value was determined based on the following evaluation criteria for the evaluation of the sense of use. In addition, the total evaluation in the table is an average value obtained by judging the average value in each of the above-mentioned areas based on the following evaluation criteria for the evaluation of the feeling of wearing.

(Evaluation criteria)

1 point: There is no foreign body sensation, violation feeling, and comfortable wearing

2 points: There is almost no foreign body sensation, violation feeling, and good appearance

3 points: There is a slight sense of foreign body, violation, and common sense

4 points: There is a sense of foreign body, a sense of violation, and a bad sense of decoration

5 points: Very foreign body feeling, violation feeling, uncomfortable feeling

(Judgment criteria for evaluation of wearing feeling)

◎(Comfortable): Average below 2.0

○ (good): average value 2.1 or more and 3.0 or less

△(Normal): Average value 3.1 or more and 4.0 or less

× (Uncomfortable): Average value of 4.1 or more

As shown in Table 1, the absorbent articles of Examples 1 and 2 have no leakage of excretory fluid and no liquid backflow, and can maintain high absorption performance as an absorbent article while achieving an excellent feeling of wearing. On the other hand, the absorbent articles of Comparative Examples 1 to 3 are all inferior to the feeling of use.

1: absorbent article

22: Absorber

21: Surface flakes

P: recess

7: the first end

3: wings

4: Adhesive part

8: 2nd end

C _L : Central axis in the widthwise direction

5: Front edge

2: Absorption body

N ₁ : low elongation area

P’: recess

N ₂ : Low elongation area

3’: Wing

7’: 1st end

A ₁ : Front side area

L ₁ : 1st imaginary straight line

4’: Adhesion

A ₂ : Area corresponding to the drain

L ₂ : 2nd imaginary straight line

8’: 2nd end

S: Slit

E ₃ : Elongation area

A ₃ : Rear side area

N ₃ : low elongation area

6: Rear side edge

L: Long side direction

W: wide side direction

E ₂ : Elongation area

Claims (11)

An absorbent article comprising an absorbent article having a longitudinally long absorbent body portion in a longitudinal direction and a broad-side direction, characterized in that the absorbent body portion has, in the longitudinal direction, the time when the absorbent article is installed The front region on the front side of the wearer, the absorbent region is placed on the rear region on the rear side of the user, and between the front region and the rear region. When the article is installed, the area corresponding to the discharge port of the discharge port of the user is installed. The torque value of the rear side area is smaller than the value of the torque of the area corresponding to the discharge port, and is smaller than 8mN. The rear side region includes an elongated region that is extensible at least in the longitudinal direction, and the corresponding region of the excretory opening includes a central axis that extends across the widthwise direction of the absorbent body and extends longer than the foregoing The region has a lower elongation or a non-elongated low-elongation region. Furthermore, the absorbent body includes a liquid-permeable top sheet on the skin surface side in the thickness direction, and a liquid on the non-skin surface side in the thickness direction. An impermeable back sheet and an absorber are located between the sheets and extend from the front side region to the rear side region in the longitudinal direction. The absorber has Plural slit portions extending in the widthwise direction of the aforementioned absorbent body portion. The absorbent article as described in item 1 of the patent application scope, wherein the absorbent body portion has an adhesive portion for fixing clothing on the surface of the non-skin surface side, and the adhesive portion for fixing clothing is placed on the wide side The adhesives extending continuously or intermittently in the direction are arranged in a plurality of rows along the aforementioned long-side direction. The absorbent article according to item 1 or 2 of the patent application scope, wherein the absorbent body portion has two regions located in the longitudinal direction of the absorbent body portion with respect to the low-elongation region in the region corresponding to the discharge port Side, and an elongated region extending from the elongated region of the rear side region. The absorbent article according to item 1 of the patent application range, wherein the absorbent body portion has a low-elongation region extending from the low-elongation region of the corresponding region of the discharge port in the front side region. The absorbent article as described in item 1 of the patent application range, wherein the absorbent body portion has the rear side region between the elongated region located in the rear side region and the rear side edge of the absorbent body portion Low elongation area. The absorbent article according to item 1 of the patent application range, wherein the absorbent body portion has an elongation rate of 10% or more in the longitudinal direction of the elongated region. The absorbent article as described in item 1 of the patent application range, wherein the plurality of slits are viewed from above in a plan view, and the slits adjacent to each other in the longitudinal direction of the absorbent body are partially overlapped with each other in the longitudinal direction The way is configured. The absorbent article according to item 1 of the patent application scope, wherein the absorbent body has, in the elongated region, a thin slit portion existing region where the plurality of thin slit portions exist, and a thin slit portion missing region where the thin slit portion does not exist, In addition, the slender portion non-existent region has a first non-existent region extending from one end toward the other end in the widthwise direction of the absorber toward the front side in a plan view, and crosses the first non-existent region, and from The second non-existent region extending from one end of the absorbent body in the widthwise direction toward the other end toward the rear side, and the thin slit present region is present in an area surrounded by the first non-existent region and the second non-existent region . The absorbent article according to item 1 of the patent application scope, wherein the absorbent body includes an absorbent core containing an absorbent material, and at least one stretchable sheet surrounding the absorbent core, the stretchable sheet may face at least the aforementioned Longitudinal extension. An absorbent article as described in item 9 of the patent application range, wherein the stretchable sheet is composed of a nonwoven fabric including fibers oriented along the widthwise direction of the absorbent body. The absorbent article as described in item 1 of the patent application range, wherein the back sheet has a bellows structure that extends in the elongated region in the longitudinal direction of the absorbent body.

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