TWI702945B - Absorbent articles - Google Patents

Abstract

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

The absorbent article (1) of the present invention has a longitudinally elongated body portion (2) in the longitudinal direction and the width direction on the front end edge portion (5) and the rear of the absorbent article (1) in the longitudinal direction Between the side edge portions (6) there are: a first area (A ₁ ), a second area (A ₂ ), a third area (A ₃ ), and a fourth area (A ₄ ), the aforementioned fourth area (A ₄ ) It includes an elongation region (E ₄ ) that is stretchable at least in the longitudinal direction, and the second region (A ₂ ) includes a low elongation region (N) having a lower elongation or non-elongation than the elongation region (E ₄ ). _2). Furthermore, the low elongation region (N ₂₎ at least viewed in the widthwise direction on both sides of the central axis (C _L) is provided along the longitudinal direction of the main body portion (2) which extend in the plan view, and having a ratio of The other parts have multiple linear recesses (P, P') at the bottom with higher density.

Description

Absorbent articles

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

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

As for such absorbent articles, for example, Patent Document 1 discloses an absorbent article provided with an absorbent layer, and the absorbent article is formed by a plurality of slits or local elongation of the absorbent layer. Stretching area. According to the absorbent article disclosed in Patent Document 1, the body suitability (that is, fit) to the wearer of the absorbent article can be improved.

[Prior technical literature] 〔Patent Literature〕

[Patent Document 1] JP 2007-523665 A

The absorbent article disclosed in Patent Document 1 does not have a stretchable area arranged in accordance with the wearer's behavior. The stretchable area is set from the front side area in the longitudinal direction of the absorbent article to the longitudinal direction. The rear side area. However, the absorbent article worn by the wearer is placed behind the longitudinal direction of the wearer’s buttocks by alternating left and right movements of the wearer’s buttocks when the wearer performs walking or other actions. The side area applies force in the torsion direction with the longitudinal direction of the absorbent article as the axis. Therefore, if the stretchable area is arranged as in Patent Document 1, the force in the torsion direction in the rear area is transmitted to the corresponding device. The area of the excretion opening (or contact) of the wearer, thereby, the deformation of the area corresponding to the excretion opening may cause the wearer to produce a foreign body feeling, a sense of disharmony, etc., which may impair the wearing feeling.

In addition, as in the absorbent article disclosed in Patent Document 1, if the absorbent body is stretched by slits or the like, the absorption performance of the absorbent body (especially, the absorption performance of the stretchable part formed by the slits or the like) decreases Is usual. However, the absorbent article disclosed in Patent Document 1 does not specifically consider the absorption performance of the absorber. Therefore, the absorption performance of the absorber cannot be fully exerted due to the behavior of the wearer and the wearing time. , There will be concerns about leakage and return (rewetting) of excrement fluid discharged from the user.

Here, the present invention is to provide an excellent installation The purpose is to use absorbent articles with high sensation and high absorption performance.

An absorbent article of one aspect (aspect 1) of the present invention is provided with: a longitudinally elongated body portion having a longitudinal direction and a widthwise direction, and a pair extending along both sides of the longitudinal direction of the body portion A pair of wing parts and a pair of wing parts arranged in each of the pair of wing parts, a pair of absorbent articles extending in the longitudinal direction of the adhesive part for clothing fixing, wherein the body part has: an absorbent article The time of use is at the front end edge of the wearer’s front side in the longitudinal direction; the wearing time of the absorbent article is at the rear end edge of the longitudinal direction of the wearer’s rear side; , The first imaginary straight line extending between the pair of first ends on the proximal side with respect to the front side edge portion of the both ends in the longitudinal direction including the pair of adhesive portions and the front side The first area between the edge portions; the second area extending between the second imaginary straight line and the first imaginary straight line extending in the central portion of each of the aforementioned pair of adhesive portions; The distance between the third imaginary straight line and the second imaginary straight line of the pair of second ends on the proximal side with respect to the rear end edge portion of the both ends in the longitudinal direction of the pair of adhesive parts The third region; and a fourth region extending between the third imaginary straight line and the rear edge portion, the fourth region includes an elongation region that is at least stretchable in the longitudinal direction, and the second region is seen in plan view It includes a low-elongation region that extends across the widthwise central axis extending in the longitudinal direction of the body portion and has a lower elongation or non-elongation than the above-mentioned elongation region. Furthermore, the aforementioned low elongation The region includes a plurality of linear recesses extending in the longitudinal direction of the main body portion at least on both sides of the central axis in the widthwise direction when viewed in plan, and having a bottom portion with a higher density than other portions.

In the absorbent article of this aspect 1, since the fourth area constituting the area corresponding to the wearer’s buttocks includes the elongation area, when the wearer performs actions such as walking, the wearer’s buttocks are on the left and right. Alternate action, in the area of the back side of the absorbent article with the longitudinal direction of the absorbent article as the axis, even if the absorbent article is applied in the twisting direction (hereinafter referred to as the "twisting direction"), the aforementioned stretched area is fitted The movement of the user not only stretches in the longitudinal direction, but also deforms in the twisting direction with the aforementioned longitudinal direction as the axis, so that the fourth area including the stretched area can be maintained in close contact with the wearer’s skin. (That is, an excellent wearing feeling can be obtained), and the aforementioned force in the twisting direction is buffered by the deformation of the aforementioned stretched area, and it is not easy to transmit to the area (at least the first part) corresponding to the excretory opening (or contact) of the wearer. 2 areas).

Furthermore, the absorbent article of the present aspect 1, because the second area constituting the area corresponding to the excretion opening (or contact) of the wearer includes a low elongation area (that is, an area that is not easily deformed), it is The second area, which is less affected by the actions of the user, can easily maintain the shape of the main body (that is, the shape of the main body is not easily deformed), and can stably absorb the excrement discharged from the wearer for a long time .

In addition, in the absorbent article of aspect 1, the low elongation region is provided with a bottom portion extending in the longitudinal direction of the body portion at least on both sides of the central axis in the widthwise direction and having a higher density than the other portions. complex There are several linear recesses, so the wearer’s action applies force in the torsion direction of the absorbent article to the back area of the absorbent article, or the wearer’s groin is applied to the width of the body At the time of force, in the area corresponding to the excretion opening of the wearer, especially the central part (that is, the area sandwiched by the linear recesses), the rigidity of the rigid linear recesses is easier Maintaining the shape of the aforementioned body can more stably and more reliably absorb the excrement discharged from the wearer. Furthermore, in the area sandwiched by the linear recesses, the absorbent material in the main body is partitioned by the linear recesses, and it is not easy to move from the area. Therefore, the main body can be performed well and stably. Part (especially, the area corresponding to the excretion opening of the wearer).

As a result of the above, the absorbent article of the present aspect 1 can balance an excellent wearing feeling with high absorption performance.

Furthermore, in another aspect of the present invention (aspect 2), in the absorbent article of aspect 1, the third region has a low elongation region extending from the low elongation region of the second region, and a relative The low elongation area is located on both sides of the longitudinal direction of the main body and extends from the elongation area in the fourth area. Furthermore, the low elongation area in the third area has A plurality of linear recesses each extending from the plurality of linear recesses in the low elongation region in the second region.

In the absorbent article of this aspect 2, because the low elongation zone exists from the second zone to the third zone, the area where the deformation of the main body part is not easily secured can be more widely secured, so it can be more stable and more stable. Reliably absorb the excretion discharged from the user. In addition, the main body portion has the extension area extending from the fourth area on both sides of the low elongation area in the third area in the longitudinal direction of the main body portion, so even if the wearer walks When the force in the twisting direction is transmitted from the rear area of the absorbent article, or the groin portion of the wearer applies force in the direction of the width of the main body, it is also possible to use the third The deformation of the aforementioned elongated area in the area buffers these forces. Thereby, the absorbent article of the present aspect 2 is easier to maintain the central portion in the widthwise direction in the second and third regions of the main body portion (that is, the low elongation region (especially, the plurality of linear recesses) Because of the shape of the sandwiched low elongation region), it can more stably and reliably absorb the excrement discharged from the wearer.

Furthermore, in another aspect of the present invention (aspect 3), in the absorbent article of aspect 1 or 2, the first region includes a low elongation region extending from the low elongation region of the second region.

In the absorbent article of this aspect 3, since the low elongation area exists across the first area from the second area, it is possible to secure a wider area where the shape of the main body part is easily maintained (that is, it is not easily deformed). Especially in the area on the front side in the longitudinal direction of the main body part where the influence of the wearer's movement, the extension of the underwear, etc. is relatively small, the shape of the main body part can be easily maintained, and it can be absorbed more stably and more reliably for a long time. Excretion fluid discharged from the user.

Furthermore, in another aspect of the present invention (aspect 4), in the absorbent article of any of the aforementioned aspects 1 to 3, the aforementioned fourth region It includes the low elongation region located between the rear edge portion and the elongation region.

In the absorbent article of this aspect 4, the area between the rear end edge portion and the elongation area in the fourth area is a portion that is relatively less affected by the wearer's movement, the elongation of the underwear, etc. If the low elongation area is arranged in such an area, it can ensure excellent strength and absorption performance as an absorbent article.

Furthermore, in another aspect of the present invention (aspect 5), in the absorbent article of any one of the aforementioned aspects 1 to 4, the main body part is provided with: liquid permeable on the skin surface side in the thickness direction The flexible surface sheet, the liquid-impermeable back sheet located on the non-skin surface side in the thickness direction, and the absorber are located between these sheets and extend from the first area to the fourth area, The absorbent body has a plurality of slits extending in the widthwise direction of the main body in the stretched region.

In the absorbent article of this aspect 5, since the absorbent body constituting the main body portion has a plurality of slit portions extending in the widthwise direction of the main body portion in the stretched area, when the wearer performs actions such as walking, The aforementioned elongation zone is adapted to the wearer's movements (especially the left and right alternate movements in the hips), the elongation of the underwear, etc., not only in the stretchable longitudinal direction, but also easily deformed in the above-mentioned twisting direction. The area is more precise and closely adheres to the wearer’s skin.

Furthermore, the absorber, which accounts for most of the thickness of the main body of the absorbent article, has a plurality of slits, because the absorber can originally impart excellent flexibility to the main body (especially softness in the thickness direction and the width direction). Therefore, as an absorbent article, better physical fitness (that is, fit) can be obtained.

Furthermore, in another aspect of the present invention (aspect 6), in the absorbent article of aspect 5, the plurality of sipes are seen in a plan view, and the sipes adjacent to each other in the longitudinal direction of the main body part The aforementioned longitudinal direction is arranged in such a way that a part of it overlaps.

The absorbent article of this aspect 6 is because the plurality of slits in the stretched region are viewed in a plan view, and the slits adjacent to each other in the longitudinal direction of the main body portion are arranged so as to partially overlap in the longitudinal direction ( In other words, since the plurality of slits in the elongated region are viewed in a plan view, the slits adjacent to each other in the longitudinal direction of the main body are arranged in the longitudinal direction so as not to overlap at all. Therefore, the elongated region is When the wearer's movement or the like deforms in the longitudinal direction or the torsion direction, the absorbent body is less likely to be torn in the slit portion and the absorbent body is torn in the longitudinal direction.

In addition, in the absorbent body, the portion where the slit portion does not exist can exhibit a predetermined absorption performance. Therefore, if a plurality of slit portions are arranged in the stretch region as described above, the portion that can exhibit the predetermined absorption performance is stretched The area will not be offset, and the predetermined absorption performance can be exerted even in the stretched area.

Therefore, the absorbent article of the present aspect 6 can more reliably exert the above-mentioned functions and effects achieved by the aforementioned stretched region, and the absorption performance in the stretched region can also be stably exerted.

Furthermore, in other aspects of the present invention (aspect 7), the previous In the absorbent article according to aspect 5 or 6, the absorbent body has in the stretched region: a sipe part existence area where the plurality of sipe parts exist, and a sipe part nonexistence area where the sipe parts do not exist, and further, The slit portion non-existent area has, in a plan view, a first non-existent area extending from one end in the widthwise direction of the absorbent body toward the other end toward the front side, and a first non-existent area that intersects the first non-existent area and extends from the absorbent body. The second non-existent area extending rearward from one end in the widthwise direction of the, the slit portion existing area exists in an area surrounded by the first non-existent area and the second non-existent area.

The absorbent article of this aspect 7 has a slit portion non-existent area extending in the above-mentioned specific two directions in the stretched area absorbent body, which can sufficiently ensure the strength and absorption performance of the absorbent body, and has the slit portion The area where the slits are surrounded by the non-existent area can increase the extension range of the absorbent body. Therefore, even when the wearer's movement is too large, it can maintain good absorption performance and make the aforementioned body part tight. Stick on the skin of the wearer.

Furthermore, in another aspect of the present invention (aspect 8), in the absorbent article of any one of the foregoing aspects 5 to 7, the surface sheet has a structure in the stretched region: in the widthwise direction A plurality of linear protruding strips extending and arranged at predetermined intervals in the longitudinal direction; and a plurality of linear protruding strips located between adjacent protruding strips and extending in the widthwise direction Extensible uneven structure formed by the grooves.

The absorbent article of this aspect 8, because the surface sheet has the aforementioned stretchable concavo-convex structure in the aforementioned stretched area, the aforementioned present invention The stretched area of the body is more easily deformed in accordance with the action of the wearer. Therefore, it is possible to more reliably achieve a state in which the area including the stretched area is in close contact with the wearer's skin surface (that is, the absorbent article can be worn The feeling of use is further improved), and the force in the twisting direction applied to the rear area of the absorbent article becomes less likely to be transmitted to the area (at least the second area) corresponding to the wearer’s excretion opening (or contact) ).

Furthermore, in another aspect of the present invention (aspect 9), in the absorbent article of any one of the aforementioned aspects 5 to 8, the back sheet has a length extending along the stretched area toward the body. The snake belly structure that extends in the side direction.

In the absorbent article of this aspect 9, because the liquid-impermeable back sheet has a bellows structure in the aforementioned stretched region, the so-called liquid-impermeable property of the back sheet ensures that the user’s excretion is safe Leakproofness, the extensibility in the longitudinal direction of the aforementioned stretched area can be obtained more reliably by the stretchable bellows structure.

In addition, if a plurality of slits are formed in the absorbent body as described above, although the excrement discharged from the wearer easily reaches the back sheet through the slits, the absorbent article of this aspect 9 is acceptable. The excretion that has reached the back sheet is diffused in the broadside direction along a groove extending in the broadside direction of the bellows structure. Thereby, even if the excrement liquid discharged from the wearer reaches the back sheet via the slit portion, the excretion liquid can be spread in the width direction of the back sheet while allowing it to pass from the non-skin surface side of the absorbent body. A wide area of the surface is absorbed.

Furthermore, if the aforementioned back sheet has the above-mentioned bellows structure, because In order to provide softness, cushioning properties, etc. in the thickness direction of the absorbent article, the wearing feeling of the absorbent article can be further improved.

In addition, if the back sheet has a bellows structure in the aforementioned stretched area, it is easy to see that this area is a stretchable part. Therefore, for wearers, those in need, etc., it is easy to recognize that the absorbent article of this aspect 9 is stretchable. , Flexibility and other special advantages of products.

Furthermore, in another aspect of the present invention (aspect 10), in the absorbent article of any one of aspects 5 to 9, the back sheet has a substantially flat structure at least in the second region.

In the absorbent article of this aspect 10, the back sheet has a substantially flat structure at least in the low elongation area in the second area (that is, because it has a structure that can become a starting point for bending), the The shape of the aforementioned main body in the second area is easier to maintain, and it is possible to more stably absorb the excretion discharged from the wearer.

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

1: Sanitary napkins for sanitary use (absorbent articles)

2: body part

3. 3’: Wing

4. 4’: Adhesive part

5: Front edge

6: Rear edge

21: Surface flakes

22: Absorber

23: back sheet

Fig. 1 is a plan view of the sanitary napkin 1 according to one embodiment of the present invention as viewed in the thickness direction from the surface sheet side.

Figure 2 is a sanitary napkin in one embodiment of the present invention A plan view in the state of 1 seen 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 of one embodiment of the present invention.

Fig. 5 is a plan view of a state where the absorber 22 used in the sanitary napkin 1 of one embodiment of the present invention is not stretched (natural state).

Fig. 6 is a plan view of the stretched state of the absorber 22 used in the sanitary napkin 1 according to one embodiment of the present invention.

FIG 7 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.

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 emphasis, only objects placed on a horizontal surface (for example, absorbent articles, body parts, absorbent articles, etc.) are placed on a horizontal surface in an expanded state viewed from the upper side of the vertical direction toward the thickness direction of the object. Body, etc.)” is called “top view”.

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

In this manual, the "broadside direction W" refers to "the The direction in which the length of the vertically long object is short (short-side direction)", the "long-side direction L" refers to the "longitudinal direction of the long object in a plan view", and the "thickness direction T" is Refers to "the vertical direction relative to the object placed on the horizontal surface in the expanded state", and the width direction W, the longitudinal direction L, and the thickness direction T are mutually orthogonal to each other.

In addition, in this specification, "in the longitudinal direction L of the absorbent article, when the wearer loads the absorbent article, the side that is relatively proximal to the wearer's abdomen" is referred to as the "absorbent article" In the longitudinal direction L of the absorbent article, the wearer’s abdomen becomes the relatively far side (that is, the wearer’s back is relatively close to the wearer’s back when the wearer wears the absorbent article). "The other side of the side) is called "the back side of the absorbent article".

In addition, in this specification, "the widthwise direction W of the longitudinally long object (for example, absorbent article, main body, absorbent body, etc.), relative to the widthwise center extending in the lengthwise direction L C _L axis opposite 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 is relatively far The bit side" is called the "outer side in the widthwise direction".

In addition, if there is no particular emphasis in this specification, in the thickness direction T of the absorbent article, the "side relative to the wearer's skin surface when the absorbent article is installed" is referred to as the "skin surface side" , "When the absorbent article is installed, the relatively distal side with respect to the skin surface of the wearer" is called the "non-skin surface side".

Fig. 1 is a plan view of a sanitary napkin 1 according to an embodiment of the present invention as viewed in the thickness direction T from the surface sheet side. Fig. 2 is a plan view viewed from the back sheet side in the thickness direction T in a state where the sanitary napkin 1 is unfolded. In addition, in FIGS. 1 and 2, the upper side of the drawing surface corresponds to the front side of the absorbent article, and the lower side of the drawing surface 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 sanitary napkin 1 taken along the line IV-IV in Fig. 1.

As shown in Figures 1 and 2, the sanitary napkin 1 of the present embodiment has a longitudinal shape in which the overall outer shape is elongated in the longitudinal direction L when viewed from above, and further, the central portion in the longitudinal direction L is The outer edge on the front side has a substantially trapezoidal shape protruding toward the outer side in the widthwise direction W. Specifically, the sanitary napkin 1 has a longitudinal direction and a widthwise direction in a plan view, and is provided with: a longitudinally long body portion 2 that is long in the longitudinal direction L 2 in the longitudinal direction L of the body portion 2 A pair of substantially trapezoidal wing portions 3, 3'and wing portions 3 arranged on the pair of substantially trapezoidal wing portions 3, 3'extending along both sides of the longitudinal direction L of the main body portion 2 at the central portion on the front side Each of 3'and 3'is a pair of adhesive parts 4, 4'for fixing clothes extending in the longitudinal direction L.

The main body 2 is shown in FIGS. 3 and 4, and in the thickness direction T is provided with a liquid-permeable surface sheet 21 on the skin surface side, a liquid-impermeable back sheet 23 on the non-skin surface side, and at The absorbent body 22 having a plurality of slits S extending in the widthwise direction W between the respective sheets, and the surface on the non-skin surface side of the aforementioned back sheet 23 to extend in the widthwise direction W Arbitrary forms such as strips are arranged, and the clothing fixing adhesive part (not shown) of the main body part 2 extending in the longitudinal direction L is configured to absorb and retain the discharge from the wearer Excretion. On the other hand, the aforementioned wings 3, 3'are shown in Figures 1, 2 and 4 and are provided in the thickness direction T: located on the skin surface side and extending from the main 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 main body 2 in the widthwise direction W, and the surface arranged on the non-skin surface side of the back sheet 23 extend in the longitudinal direction L Adhesive parts 4, 4'for fixing the clothes.

In addition, when the sanitary napkin 1 is used for installation, the main body 2 is fixed to the installation by a clothing fixing adhesive part (not shown) arranged on the non-skin surface side of the main body 2 After the wearer wears the surface of the skin side of the clothing, the pair of wings 3, 3'are respectively folded toward the non-skin surface side of the clothing, and the wings 3, 3'are arranged on the non-skin surface Adhesive parts 4, 4'on the side surface are fixed on the non-skin surface side of the aforementioned clothes for the user. Therefore, the non-skin surface side of the pair of wings 3, 3'is used in sanitary napkins. When it is used, 1 becomes the face facing the wearer's skin.

The aforementioned main body 2 has, in a plan view, as shown in FIG. 1, when the sanitary napkin 1 is installed, it is positioned on the front side (abdominal side) of the wearer at the front end edge 5 in the longitudinal direction L; The sanitary napkin 1 is installed at the rear side end 6 in the longitudinal direction L on the rear side (back side) of the wearer; the first area A ₁ extends over the aforementioned pair of wings The two ends 7, 8, 7', and 8'in the longitudinal direction L of the respective adhesive portions 4, 4'of the parts 3, 3'include one located on the proximal side with respect to the aforementioned front end edge portion 5. Between the first imaginary straight line L _{1 of the} pair of first end portions 7, 7'and the aforementioned front end edge portion 5; the second area A ₂ extends to include the aforementioned pair of adhesive portions 4, 4' Between the second imaginary straight line L ₂ and the aforementioned first imaginary straight line L _{1 in the} center of each longitudinal direction; the third area A ₃ extends in the longitudinal direction of the aforementioned pair of adhesive portions 4, 4' The two ends 7, 8, 7', 8'of L include a pair of second ends 8, 8'that are located on the proximal side with respect to the aforementioned rear end edge portion 6, a third imaginary straight line L ₃ Between the second virtual straight line L ₂ and the fourth area A ₄ , which extends between the third virtual straight line L ₃ and the rear end edge 6.

In addition, 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 main body portion 2 each have a substantially arc-shaped plan view shape. The above-mentioned respective regions A ₁ to A ₄ extend between the front end edge portion 5 and the rear end edge portion 6 in a band shape to a substantially rectangular shape.

Furthermore, the aforementioned fourth area A ₄ includes an elongation area E ₄ that is stretchable in at least the longitudinal direction L as shown in FIG. 1, and the aforementioned second area A ₂ is configured to include straddling the main body when viewed from above. The central axis C _{L in the} widthwise direction extending in the longitudinal direction L of 2 extends, and has a lower elongation rate than the aforementioned elongation region E ₄ or a non-elongation low elongation region N ₂ .

Furthermore, the low elongation area N _{2 of} the second area A ₂ is shown in FIGS. 1, 2 and 4, and is provided with two linear recesses P, P'in a plan view, which are on the wide side the direction of the central axis C _L of the sides along the longitudinal direction L of the body portion 2 extending exists, having a higher density than the other portions of the bottom.

Further, the present embodiment forms the absorbent body 22, is shown in FIGS. 1 to 3, is configured to extend from the first presence of A ₁ to the area of the fourth area A _4.

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

In addition, in this specification, "stretchable" can refer to the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010, and the object is pulled with a force of 5.0N in two opposite directions. When it does not break, and the length (100%) of the object in its natural state (that is, the state before stretching) is extended by 3% or more (that is, the length after stretching becomes 103% or more) Elongation). Therefore, in this specification, (at least stretchable in the longitudinal direction) "elongation zone" means: according to the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010, the predetermined direction opposite to the longitudinal direction When the target area is pulled with a force of 5.0N in the two directions, it will not break, and is relatively The length (100%) of the region in the state before extension is stretched by 3% or more of the stretched region (that is, the length of the stretched region becomes 103% or more of the stretched region).

In addition, in this specification, "elongation" refers to the time when an object is pulled with a force of 5.0N in two opposite predetermined directions according to 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 stretching (that is, the length after stretching) with respect to the length of the natural state (that is, the state before stretching) can be specifically obtained by the following formula.

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

In addition, in this specification, "non-elongation" refers to the time when an object is pulled with a force of 5.0N in two opposite directions according to the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010 , It will not break, and the length of the object in its natural state will not be extended by more than 3%. Therefore, "non-elongation" not only does not extend by more than 3% relative to the length of the object in the natural state and breaks, but also includes the case where the length (100%) of the object in the natural state is extended by less than 3%. Situation (that is, the length after extension becomes less than 103% "minimal extension".

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

The sanitary napkin 1 of the present embodiment includes the stretched area E ₄ in the fourth area A ₄ that constitutes the area corresponding to the wearer’s buttocks when worn. Therefore, when the wearer performs actions such as walking, As the wearer’s buttocks alternately move left and right, even in the area behind the sanitary napkin 1, a force is applied to draw the sanitary napkin 1 in a twisting direction with the longitudinal direction L of the sanitary napkin 1 as the axis. operation with the elongated region E repackage _4, not only the longitudinal direction L of elongation, also deformed in a twisting direction of the axis L to the longitudinal direction, whereby the elongated region comprises a region E 4 a ₄ of ₄ It can maintain the state of being in close contact with the wearer's skin surface (that is, an excellent wearing feeling can be obtained), and the aforementioned force in the twisting direction is buffered by the deformation of the aforementioned stretched area E ₄ , which is not easily transmitted to the corresponding The area of the excretion (or contact) of the wearer (at least the second area A ₂ ).

In addition, the sanitary napkin 1 of the present embodiment includes the low elongation area N ₂ in the second area A ₂ constituting the area corresponding to the excretion opening (or contact) of the wearer. Therefore, the wearer's movement The second area A ₂ , which has relatively little influence due to other factors, can easily maintain the shape of the main body 2 (that is, the shape of the main body 2 is not easily deformed), and can stably absorb menstrual blood discharged from the wearer for a long time And other excretion fluid.

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

If the elongation is 10% or more, the above-mentioned stretched area is more easily deformed. Therefore, the effect caused by the above-mentioned stretched area is performed, that is, when the wearer is walking or the like, the stretched area In accordance with the wearer's movements (especially the left and right alternate movements in the buttocks), the extension of the underwear, etc., not only the stretchable longitudinal direction L, but also the above-mentioned twisting direction In the direction of deformation, the so-called effect of allowing the fourth region including the aforementioned stretched region to adhere to the wearer’s skin surface more accurately and more reliably can be exerted more well and more reliably.

In addition, if the above-mentioned elongation rate is high, the difference in elongation rate from the underwear (especially shorts) to which the sanitary napkin is attached becomes small, so that the sanitary napkin can be made to respond to the wearer's movement and the movement of the underwear. It is easier to link, that is, it also has the advantage that it can be used as a pair with a good sense of use. In particular, the so-called ease of attachment to shorts and easy accessibility to shorts are based on the method described in "6.3 Tensile Strength and Elongation" of JIS L 1913:2010, and 0.5N is used in the opposite predetermined two directions. When pulling the object, it is ideal to extend 3% or more.

Further, the present embodiment with physiological sanitary napkin 1, as the second region A ₂ of low elongation region N ₂ is provided along the longitudinal direction of the main body portion 2 at both sides of the center axis _L C L extending in the widthwise direction There are two linear recesses P and P'with a bottom with a higher density than the other parts. Therefore, the sanitary napkin 1 is applied to the rear area of the sanitary napkin 1 by the action of the wearer. The force in the twisting direction, or even when the wearer’s groin portion applies force in the widthwise direction W of the main body portion 2, in the area corresponding to the wearer’s excretion opening, in particular, the area that becomes the central part (that is, The area sandwiched by the aforementioned two linear recesses P, P'), the rigidity of the linear recesses P, P'with hard hardness makes it easier to maintain the shape of the main body 2 and can absorb more stably and firmly Excretion fluid such as menstrual blood discharged from the wearer. Furthermore, in the area sandwiched by the two linear recesses P, P', the absorbent material described later in the main body 2 is divided by the two linear recesses P, P', and It is not easy to move from this area, and therefore, the absorption performance of the main body 2 (especially, the area corresponding to the excretion opening of the wearer) can be exhibited well and stably.

In the present embodiment, the linear recesses P, P'use arbitrary pressing means such as heating or non-heating embossing to combine the surface sheet 21, the absorber 22, and the back sheet 23 that constitute the main body 2 The laminated body formed by overlapping in this order can be formed by squeezing the surface on the skin side of the surface sheet 21 in the thickness direction T.

In the present invention, the shape of the linear recesses in plan view is not particularly limited. In addition to combining the curved shapes of the above-mentioned embodiment, linear, dashed, zigzag, geometric, or predetermined designs can be used. Any shape such as shape.

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 the longitudinal direction L of the main body portion 2 from the first a ₁ across the region to the fourth region being arranged symmetrically about ₄ a, however, the present invention as long as the shape can be maintained by low elongation region of the linear concave portion is gripped, its form is not particularly limited configuration for example, the sum of linear concave portion may be arranged in three or more sides of the widthwise direction _L of the central axis C, L may be across from the first to the zone a ₁ along the longitudinal direction of the main body portion 2 of The fourth area A ₄ is arranged or is arranged only across the second area A ₂ and the third area A ₃ . If a plurality of linear recesses that increase the rigidity of such a main body are arranged, the shape of the main body can be maintained more easily.

In addition, the linear recessed portion is arranged at a position that does not overlap the slit portion of the absorbent body described later in the thickness direction T from the viewpoints of maintaining the shape of the low elongation region and ensuring the extensibility of the elongation region (that is, not The position that overlaps with the stretched area) is ideal.

Hereinafter, the elongation area and the low elongation area of the sanitary napkin 1 of this embodiment will be described in further detail.

Low from the second region A of the low elongation region ₂ toward the longitudinal direction of the ₂ N L extending rearward side: Physiological sanitary napkin with the present embodiment 1 is shown in Figure 1, the third region A ₃ having The elongation area N ₃ and the low elongation area N ₃ are located on both sides of the longitudinal direction L of the main body 2 and extend from the elongation area E _{4 of} the fourth area A ₄ to the front of the longitudinal direction L an elongated region extending side E _3, Furthermore, a ₃ in the third region the low elongation region N _3, is provided with a configuration from the second region a ₂ in the low elongation region of the N linear concave portion ₂ Each of P and P'has a plurality of linear recesses extending toward the rear side of the longitudinal direction L.

With this configuration, the absorbent article of the present invention is not a must in the structure, and so if the low elongation region is present across the second region A ₂ to the third region from A _3, can be secured wider portion 2 of the main body The area that is not easily deformed can absorb excretion fluid such as menstrual blood discharged from the wearer more stably and more reliably. In addition, the main body portion 2 has a low elongation area N ₃ relative to the third area A ₃ on both sides of the main body portion 2 in the longitudinal direction L from the fourth area A ₄ toward the front side in the longitudinal direction L The extended elongation area E ₃ , so even if the force in the twisting direction is transmitted from the rear area of the sanitary napkin 1 due to the wearer’s walking or the like, or the wearer’s groin part faces the aforementioned body urging the widthwise direction W 2 of this time, also by the third region a force elongation E of the buffer zone ₃ such modification _3. Thereby, the sanitary napkin 1 having such a structure can more easily maintain the central portion in the widthwise direction of the second area A ₂ and the third area A ₃ of the main body 2 (that is, the low elongation area N ₂ , N ₃ (especially, the low elongation region sandwiched by the two linear recesses P, P'), so it can more stably and reliably absorb excretion fluid such as menstrual blood discharged from the wearer.

In addition, the sanitary napkin 1 of the present embodiment is as shown in FIG. 1, and the first area A ₁ includes the low elongation area N _{2 of} the second area A ₂ extending forward in the longitudinal direction L The low elongation zone N ₁ .

The absorbent article of such a structure is not the structure of the present invention must, and so if a low elongation region from the second region A ₂ to cross the first region A ₁ is present, as can be readily maintained to ensure more broadly the main body The shape of the portion 2 (that is, it is not easily deformed), and therefore, it is easy for the area on the front side in the longitudinal direction L of the main body portion 2 where the influence of the wearer's movement, the extension of underwear, etc., is relatively small. By maintaining the shape of the main body 2 described above, it is possible to more stably and more reliably absorb excretion fluid such as menstrual blood discharged from the wearer for a long time.

Further, the present embodiment with physiological sanitary napkin 1, the fourth region constituting the A ₄ bits contained in the low elongation region ₄ between the rear end edge portion of the elongated region 6 E N _4.

Such a structure is not an essential structure in the absorbent article of the present invention. The area between the rear end edge 6 and the stretched area E _{4 in} the fourth area A ₄ is the action of the wearer, If the low-elongation region N _{4 is} arranged in the area where the influence of the elongation of the underwear is relatively small, it is possible to ensure excellent strength and absorption performance as a sanitary napkin (absorbent article).

In this embodiment, the extension regions E ₃ and E _{4 of} the third region A ₃ and the fourth region A ₄ are shown in FIGS. 1, 3, and 4, and the various members constituting the main body 2 The predetermined region of the absorber 22, which is the thickest member, is formed by providing a plurality of slits S that penetrate the absorber 22 in the thickness direction T and extend substantially linearly in the widthwise direction W. In addition, in the absorbent article of the present invention, the elongation region is not limited to such an aspect as long as it is extensible in at least the longitudinal direction L. For example, various members constituting the main body may be formed of an extensible material. (For example, absorber, etc.) predetermined area.

As in the present embodiment, if the absorbent body 22 constituting the main body portion 2 has extension regions E ₃ and E ₄ in the third area A ₃ and the fourth area A ₄ extending in the widthwise direction W of the main body portion 2 The plurality of slits S, when the wearer performs actions such as walking, the extension areas E ₃ and E _{4 of} the third area A ₃ and the fourth area A ₄ are matched to the wearer's movement (especially in the hip The left and right alternate actions), the extension of underwear, etc., not only can be stretched in the longitudinal direction L, but also easily deformed in the above-mentioned twisting direction, and the region including the stretched regions E ₃ and E ₄ (in this embodiment, is The third area A ₃ and the fourth area A ₄ ) are more accurate and more securely adhere to the skin surface of the wearer.

Furthermore, the absorbent body 22, which accounts for most of the thickness of the main body portion 2 of the sanitary napkin 1, has such a plurality of slit portions S, because the absorbent body 22 can originally impart excellent flexibility to the main body portion 2 (in particular, the thickness The flexibility in the direction T and the width direction W), therefore, better body fit (that is, fit) can be obtained as a sanitary napkin for sanitary use.

Hereinafter, the absorbent body 22 provided with the plurality of slit portions S described above will be described in more detail while referring to the drawings.

FIG. 5 is a plan view of the absorbent body 22 used in the sanitary napkin 1 of the present embodiment in a state where it is not stretched (natural state), and FIG. 6 is a plan view of the absorbent body 22 used in the sanitary napkin 1 in an stretched state . And, FIG. 7 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 this 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. Such an absorbent body includes, for example, at least one liquid-permeable coating sheet (sometimes referred to as a "core-cladding sheet") made of tissue paper or the like around water-absorbent fibers including pulp and/ Or high-absorbent polymer absorbent materials.

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 of absorbent article, the use, the type of person to be worn, and the like. For such a thickness, for example, a thickness in the range of 0.1 mm to 10 mm can be cited, but from the viewpoint of thinning, flexibility, and fit of the absorbent article, it is The thickness in the range of 0.3 mm to 3 mm is ideal.

As shown in FIG. 5, the absorbent body 22 in the present embodiment is a form in which a plurality of slit portions S are partially overlapped in the longitudinal direction L so that the slit portions S adjacent to the longitudinal direction L of the main body 2 in a plan view It is arranged (in other words, the plurality of slits S are arranged so as to be adjacent to each other in the longitudinal direction L of the main body 2 in a plan view without overlapping in the longitudinal direction L). If _3, E ₄ is so arranged in a plurality of the elongated slit portion S region E, the physiology _3, E ₄ toward the longitudinal direction due to the operation repackage the like elongated region L with the sanitary napkin. 1 E, above When deformed in the twisting direction, the absorbent body 22 is torn in the slit portion S, and the absorbent body 22 is torn in the longitudinal direction L, which is not likely to occur. In addition, in the absorbent body 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 elongation regions E ₃ and E ₄ as described above, the predetermined absorption performance can be exhibited. The part of the absorption performance is not offset in the aforementioned extension regions E ₃ , E ₄ , and the predetermined absorption performance can be exhibited even in the extension regions E ₃ , E ₄ .

Thus, with such a configuration sanitary napkin 1, is more reliably exhibit the above effect by the elongated region E _3, E ₄ can be achieved, and the elongated region E _3, the absorbent ₄ E Performance can also be stably exerted.

In addition, the plurality of slits S in the absorbent body 22 is shown in FIG. 5, so as to have a plurality of slits existing areas A _{S in which} a predetermined number of slits S exist in the elongation regions E ₃ and E ₄ , It is arranged in a manner similar to the slit portion non-existent area A _N that does not exist in the aforementioned elongated areas E ₃ and E ₄ slit portion S. Furthermore, the aforementioned slit portion non-existent area A _N is viewed in a plan view by: from the aforementioned absorption One end (the left end in FIG. 5) of the body 22 in the widthwise direction W faces the other end (the right end in FIG. 5) and the first non-existent area A _N1 extending toward the front side (upper side in FIG. 5) , And intersecting the first non-existent area A _N1 and from one end (the left end in FIG. 5) to the other end (the right end in FIG. 5) of the absorbent body 22 in the widthwise direction W toward the rear side ( The lower side in FIG. 5) is composed of a second non-existent area A _N2 extending along, and the aforementioned slit portion existence area A _S is present in the aforementioned first non-existent area A _N1 and the aforementioned second non-existent area A _N2 Enclosed area, or by the first non-existent area A _N1 and the second non-existent area A _N2 and the widthwise end edges e ₁ , e ₂ extending in the longitudinal direction L of the absorbent body 22 Fenced area.

In the aforementioned elongation areas E ₃ and E ₄ , there is a slit portion non-existence area A _N extending the absorber 22 in the above-mentioned specific two directions. Even in the elongation areas E ₃ and E _4, sufficient strength as an absorber can be ensured And absorption performance, and further has a slit part existing area A _S surrounded by the slit part non-existing area A _N , as shown in Figs. 6 and 7, because the entire absorbent body 22 can be made uniform and elongated The range stretches in the longitudinal direction L, so even when the wearer's movements are large, good absorption performance can be maintained, and the non-elongation area N ₁ ~ N _{3 of the main} body 2 can be more securely attached On the skin of the pretender.

In the absorbent article of the present invention, as long as the plurality of slits are arranged, the elongated area forming the main body may be on the long side The elongation in the direction L is not limited to the above-mentioned embodiment. For example, the plurality of slits may be arranged in each of the areas surrounded by the non-existent area of the slit in a checkerboard format. A predetermined number of slits may exist. The slit portion existing area may be arranged in each of the areas sandwiched between the slit portion non-existent areas where a plurality of strip-shaped slit portion non-existent areas are provided along the longitudinal direction L or the widthwise direction W.

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

In addition, in the sanitary napkin 1 of the present embodiment, the slit portion S is formed as a substantially linear through hole extending along the widthwise direction W in a plan view, as shown in FIG. 5 and the like. However, the present invention Such an aspect is not limited to the absorbent article of, and the slit portion may have any shape in plan view within a range that does not impair the effect of the present invention. Examples of the shape of such a slit portion as viewed in plan include arc-shaped, V-shaped, wave-shaped, and saw-toothed shapes.

In the sanitary napkin 1 of the present embodiment, the length of the slit portion S extending in the widthwise direction W of the main body 2 (that is, the length of the slit portion in the widthwise direction) may be extended at least in the longitudinal direction L The extension area of the aforementioned main body 2 is not particularly limited, but it is desirably in the range of 3 mm to 50 mm, and more desirably in the range of 5 mm to 15 mm. If the length of the slit portion S is 3 mm or more, the extension areas E ₃ and E _{4 of the main} body 2 can be fully extended in the longitudinal direction L, and the extension areas E ₃ and E _{4 of the main} body 2 can be longer The side direction L is the axis, and it is easier to deform in the twisting direction, and furthermore, moderate flexibility can be imparted to the absorber 22 to the main body 2. In addition, if the length of the slit portion S is 50 mm or less, when the absorbent body 22 receives a force from the outer side of the widthwise direction W, the slit portion S is less likely to break open, which can ensure a good absorbent article The durability.

In the present invention, the means for forming a plurality of slits in the absorbent body is not particularly limited, and any cutting means can be adopted. For example, an absorbent body with a plurality of slits is placed on a rotating cutting roller while transporting the precursor body of the absorbent body manufactured by any manufacturing method by a conveying means such as a belt conveyor. A plurality of cutting blades on the peripheral surface are pressed against the upper surface of the forebody and penetrated to be manufactured. In addition, by appropriately adjusting the arrangement of the cutting blades of the cutting roll, a plurality of slits can be formed in the absorbent body in a predetermined arrangement form.

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

As described above, the pair of wings 3, 3'are composed of: the front sheet 21 extending from the main body 2 in the widthwise direction W, and the back sheet 21 extending from the main body 2 in the widthwise direction W 23, on the non-skin surface side surface of each wing portion 3, 3'(that is, the non-skin surface side surface of the back sheet 23), as shown in FIGS. 1, 2 and 4, There are at Adhesive parts 4, 4'for fixing clothes that extend in the longitudinal direction L are substantially rectangular.

In addition, in the sanitary napkin 1 of the present embodiment, the two end portions 7, 8, 7', 8'in the longitudinal direction L of the pair of adhesive portions 4, 4'extending thereon include those with respect to the aforementioned The first imaginary straight line L ₁ of a pair of the first ends 7, 7'of the front end edge portion 5 located on the proximal side, and a pair including a pair located on the proximal side with respect to the aforementioned rear end edge portion 6 second end portion 8, 8 'of the third imaginary straight line ₂ and the third region a _3, constituting the excretory opening area (or contact) of the corresponding repackage L ₃ between the second area region a.

Therefore, in the absorbent article of the present invention, the pair of adhesive portions in the aforementioned wing portions are arbitrary in consideration of the type and purpose of the absorbent article; the type of the person to be worn; The size and shape are arranged on the non-skin surface side of each wing. In the case of the sanitary napkin 1 of the above-mentioned embodiment, the pair of adhesive portions 4, 4'of the wing portions 3, 3'have, for example, a length in the longitudinal direction L in the range of 10 mm to 150 mm, and a width The length of the side direction W is in the form of a substantially rectangular plan view shape in the range of 5 mm to 50 mm, 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 that forms the adhesive portion for clothing fixing is not particularly limited. For example, any adhesive including a styrene-based polymer can be used.

In addition, in the sanitary napkin 1 of this embodiment, the pair of wings 3, 3'are as shown in FIGS. 1 and 4, and in a plan view, they are provided with: from the main body 2 in the widthwise direction W extended surface is thin The sheet 21 and the back sheet 23 extending from the main body part 2 in the widthwise direction W form a pair of substantially trapezoidal shape in plan view. However, in the absorbent article of the present invention, the pair of wing parts The form is not limited to such a form. The aforementioned pair of wings may be formed of shapes other than the above-mentioned substantially trapezoidal shape (for example, rectangular shape, semi-elliptical shape, predetermined design shape, etc.) in plan view. Also, it may be composed of a sheet-like member different from the aforementioned main body part (that is, a sheet-like member different from the front sheet and the back sheet constituting the main body).

Hereinafter, in the sanitary napkin 1 of this embodiment, the front sheet 21 and the back sheet 23 constituting the main body 2 and the pair of wings 3, 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 in the thickness direction T of the sanitary napkin 1 as shown in FIGS. 1, 3, and 4 1 is composed of a liquid-permeable sheet-permeable member that can directly contact the skin surface of the wearer on the central axis C _L in the widthwise direction extending in the longitudinal direction L of 1. The liquid-permeable sheet member constituting the surface sheet 21 is not particularly limited, and any non-woven fabrics such as hot-air non-woven fabrics formed using cellulose fibers, thermoplastic resin fibers subjected to hydrophilization treatment, and the like can be suitably used. Wait.

Among them, a sheet member is used 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 at least in the longitudinal direction L to form the stretched region corresponding to the main body. For such non-woven fabrics, for example: those corresponding to the stretched area of the aforementioned body A non-woven fabric in which the region is made of stretchable elastic fibers, a non-woven fabric in which the region corresponding to the stretched region of the main body portion is made of a stretchable concavo-convex structure described later, or the like.

By using this kind of non-woven fabric on the surface sheet, the stretched area of the body part is more easily deformed in accordance with the action of the wearer. Therefore, the area including the stretched area (in this embodiment, the third area A ₃ and the 4th area A ₄ ) The state in close contact with the wearer’s skin, and the force in the twisting direction applied to the rear area of the absorbent article becomes more difficult to transmit to the corresponding wearer’s The area of the excretion (or contact) (at least the second area).

Moreover, 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 stretching deformation. Therefore, the absorbent article is likely to be deformed into a concave structure on the surface sheet side ( The so-called cup-shaped structure), and it is easy to follow the shape of the wearer's body and the shape of underwear (especially, shorts).

In addition, in the absorbent article of the present invention, the size and shape of the surface sheet is not particularly limited as long as it can cover the entire surface of the skin side surface of the absorbent body arranged on the non-skin surface side of the surface sheet. Any size and shape can be adopted for the size and gender of the object of the article; Furthermore, there is no particular limitation on the thickness of the surface sheet. For example, a thickness in the range of 0.001mm to 5.0mm can be used. However, from the viewpoints of liquid permeability, cushioning properties, skin touch, etc., it is preferably in the range of 0.01 mm to 3.0 mm, and more preferably in the range of 0.1 mm to 1.0 mm.

In the absorbent article of the present invention, the structure of the surface sheet is not particularly limited. For example, although both the skin surface side and the non-skin surface side may have a substantially flat structure, the surface sheet corresponds to the body portion It is desirable that the region of the stretchable region has a stretchable uneven structure. Such a stretchable concavo-convex structure includes, in a plan view, a plurality of linear convex portions extending in the width direction W of the surface sheet and arranged at predetermined intervals in the longitudinal direction L, The cross-sectional shape along the longitudinal direction L formed by a plurality of linear grooves extending in the widthwise direction W of the surface sheet between adjacent convex strip portions becomes a substantially wave shape (also That is, the inside of the ridge portion becomes a hollow) uneven structure. Here, the ridge portion has a structure in which the skin surface side of the surface sheet protrudes toward the skin surface side in the thickness direction T of the surface sheet, and the groove portion has the surface sheet in the thickness direction T of the surface sheet. A structure in which the surface on the skin side is sunken toward the non-skin side.

If a non-woven fabric with such a stretchable uneven structure is used for the surface sheet of an absorbent article, the stretched area of the main body is more easily deformed according to the action of the wearer, so the area including the stretched area can be realized more reliably (In this embodiment, the third area A ₃ and the fourth area A ₄ ) The state in which the wearer’s skin is in close contact (that is, the feel of the absorbent article can be further improved), and applied to the absorbent The above-mentioned force in the twisting direction in the rear area of the sex article becomes more difficult to be transmitted to the area (at least the second area) corresponding to the excretion opening (or contact) of the wearer.

In addition, in the above-mentioned stretchable concavo-convex structure, the height of the ridge portion (that is, the distance between the horizontal plane including the top of the ridge portion and the horizontal plane including the bottom of the groove portion) is not particularly limited. For example, it can be The height is within the range of 0.1mm~1.2mm, but from the viewpoints of extensibility, skin feel, cushioning properties, etc., it is ideally within the range of 0.2mm~1.0mm, and more preferably 0.4mm~0.8mm Within range.

In addition, the height of the protruding part is using a laser displacement meter (for example, the high-precision two-dimensional laser displacement meter LJ-G series (model: LJ-G030) manufactured by Keynes Co., Ltd.), which can be used in a non-contact manner as follows Take measurements. Place a sample with a surface slice of 100mm×100mm in size on a horizontal measuring table, measure the displacement from the measuring table with a laser displacement meter for the 5 different protruding parts, and calculate the average of the 5 measured values As the thickness (mm) of the ridge. Similarly, the displacement from the measuring table was measured with a laser displacement meter for five different grooves, and the average of the five measured values was taken as the thickness (mm) of the grooves. The height (mm) of the convex line part was calculated from the difference between the thickness (mm) of the convex line part and the thickness (mm) of the concave groove part.

In addition, there is no particular limitation on the pitch of the above-mentioned stretchable concavo-convex structure (that is, the distance (mm) between the top centers (ridge lines) of the two adjacent protruding strips). For example, 0.5 may be adopted. 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 viewpoints of extensibility and skin touch.

In addition, the pitch of the uneven structure is based on the table in the unpressurized state. The top view photograph or top view image of the face sheet can be measured as the distance (mm) between the top centers (ridge lines) of the two adjacent ridges.

In the absorbent article of the present invention, the stretchable concavo-convex 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 made that the convex and concave portions of the concavo-convex structure described above are partially oriented in plan view. The aspect in which the absorbent article extends in a direction other than the widthwise direction W (for example, a direction inclined at a predetermined angle from the widthwise direction W of the absorbent article, etc.), while allowing at least part of the direction to change (for example, wavy, zigzag Etc.) The state where the side extends; the state where at least part of the present is discontinuously (that is, intermittently) extending in the widthwise direction W of the absorbent article; at least the interval between the two adjacent protruding strips is not A certain aspect; a aspect composed of such a plurality of convex portions (ridges) and groove portions having a plurality of concave portions as disclosed in Japanese Patent No. 5829349 and Japanese Patent No. 5829326; or the like Any combination of two or more aspects of the aspect, etc.

In this way, by appropriately setting the direction and form of the extension of the protruding stripe and the recessed grooves, the deformation of the elongated region of the main body can be arbitrarily adjusted, and the product design can be realized corresponding to the various behavior patterns of the wearer. .

The method of forming the above-mentioned stretchable 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 gas (usually a gas) on the fiber web or a vacuum forming method can be used. ; The method of calendering using gears; The method of using thermal elongation of thermally extensible fibers and/or thermal contraction of thermally shrinkable fibers, etc.

In the sanitary napkin 1 of this embodiment, the back sheet 23 is a liquid impermeable sheet member that prevents leakage of excretion fluid such as menstrual blood discharged from the wearer as shown in FIGS. 1 to 4 the configuration, which is a sanitary napkin T in the thickness direction of the non-skin facing side, is arranged on the sanitary napkin in the longitudinal direction of the wide side of L 1 C _L extending in the direction of the central axis. The liquid-impermeable sheet member constituting the back sheet 23 is not particularly limited. For example, air-permeable resin films such as polyethylene, polypropylene, etc., or laminates in which non-woven fabrics are bonded to the resin film can be suitably used. Wait.

Among them, a sheet member is used as the back sheet of the absorbent article of the present invention. It is preferable to use a liquid-impermeable sheet member. The region constituting the extension region corresponding to the main body may be at least in the longitudinal direction L elongation. Such a sheet member includes, for example, a sheet member formed of a stretchable elastic material in a region corresponding to the stretched region of the body, and a stretchable bellows structure described below is formed of a stretched region corresponding to the body. The sheet member and so on.

The use of such a sheet member on the back sheet not only ensures the leakproofness of the excreted fluid of the wearer due to the liquid impermeability of the so-called sheet member, but also has the above-mentioned stretchable structure (such as a bellows structure). ) Make the stretched area of the body part more easily deformed in accordance with the action of the wearer, so that the region including the stretched area (in this embodiment, the third area A ₃ and the fourth area A ₄ ) can be tightly tightened The state of being attached to the skin surface of the wearer (that is, the wearing feeling of the absorbent article can be further improved), and the force in the twisting direction applied to the rear area of the absorbent article becomes even greater It is difficult to communicate to the area (at least the second area) of the wearer (or contact) corresponding to the excretion opening of the wearer.

In addition, in the absorbent article of the present invention, the size and shape of the back sheet is not particularly limited as long as it can prevent leakage of excrement discharged from the wearer, and it depends on the size and gender of the wearer of the absorbent article. ; Use any size and shape. Furthermore, the thickness of the back sheet is not particularly limited. For example, although a thickness in the range of 0.001mm to 5.0mm can be used, it is desirable from the viewpoints of liquid impermeability, flexibility, and air permeability. Within the range of 0.003mm~3.0mm, more preferably within the range of 0.01mm~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 the skin surface side and the non-skin surface side may have a substantially flat structure, the aforementioned back sheet is as The back sheet 23 of the sanitary napkin 1 of the present embodiment shown in FIGS. 2 and 3 preferably has a bellows structure extending in the longitudinal direction L of the main body in the extension region of the main body.

In the sanitary napkin 1 of the present embodiment, the bellows structure B formed on the back sheet 23 is as shown in FIGS. 2 and 3 and extends from the width direction W of the back sheet 23 in plan view. , And a plurality of linear convex portions B ₁ arranged at predetermined intervals in the longitudinal direction L, and a plurality of straight convex portions B ₁ located between adjacent convex portions B ₁ and extending in the widthwise direction W of the back sheet 23 The linear grooves B ₂ are formed, and the cross-sectional shape along the longitudinal direction L has a substantially zigzag shape. Here, the convex portion B ₁ has a structure in which the skin surface side of the back sheet 23 protrudes toward the skin surface in the thickness direction T of the back sheet 23, and the groove portion B _{2 is} in the thickness direction T of the back sheet 23, It has a structure in which the surface on the skin side of the back sheet 23 is recessed toward the non-skin surface.

In this way, if the liquid-impermeable back sheet 23 has the bellows structure B in the elongated region of the body portion 2, the liquid-impermeable property of the back sheet 23 can ensure protection against excretion of the wearer. In addition, the extensibility in the longitudinal direction of the elongated region of the main body 2 can be obtained more reliably by the extensible bellows structure B. Therefore, the region including the elongated region can be more reliably achieved (in this embodiment, It is the state where the third area A ₃ and the fourth area A ₄ ) are in close contact with the wearer's skin (that is, the wearing feeling of the absorbent article can be further improved), and it is applied to the absorbent article The force in the torsion direction in the rear area becomes more difficult to be transmitted to the area (at least the second area) corresponding to the excretion opening (or contact) of the wearer.

In addition, as in the case of the present embodiment in which a plurality of slit portions S are formed in the absorbent body 22 described above, normally, the excretion fluid such as menstrual blood discharged from the wearer easily reaches the back sheet 23 through the slit portions S. but, if the above-described configuration such bellows sheet 23 B is formed on the back surface, the back surface sheet allows liquid waste reach the groove portion 23 along the widthwise direction B ₂ toward the diffusion bellows configuration B, W extending in the widthwise direction W . Thereby, even if the excrement liquid discharged from the wearer reaches the back sheet 23 through the slit portion S, the excrement liquid can be allowed to spread in the width direction W on the back sheet 23 while allowing it to pass from the absorbent body 22. The non-skin side surface is absorbed in a wide area.

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

In addition, if the back sheet has a bellows structure in the stretched area of the main body, it is easy to recognize the stretchable area. Therefore, for wearers and users, there are so-called absorbent articles that can easily recognize the present invention. It has the advantages of particularly excellent products such as extensibility, fit and flexibility.

In the bellows structure described above, the height including the convex portion (that is, the distance between the horizontal plane including the top of the convex portion and the horizontal plane including the bottom (the deepest portion) of the groove) is not particularly limited. For example, 0.1mm can be used. The height is within the range of ~1.2mm, but from the viewpoint of extensibility, cushioning, liquid diffusivity, etc., it is ideally within the range of 0.2mm to 1.0mm, more preferably within the range of 0.4mm to 0.8mm .

In addition, the height of the aforementioned convex portion can be measured in the same manner as the height of the convex portion of the stretchable concavo-convex structure in the above-mentioned surface sheet.

In addition, there is no particular limitation on the pitch of the bellows structure (that is, the distance (mm) between the top centers (ridge lines) of two adjacent convex portions). For example, 0.5mm~5.0mm can be used. The pitch within the range of is desirably within the range of 1.0 mm to 4.0 mm from the viewpoint of extensibility, cushioning properties, and liquid diffusibility.

In addition, the spacing of the bellows structure is based on the back The top view photograph or top view image of the face sheet can be measured as the distance (mm) between the top centers (ridge lines) of two adjacent convex portions.

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. For example, it can be used as: the protrusions and grooves of the bellows structure mentioned above are at least partially facing the absorbent article when viewed from above. A state in which it extends in a direction other than the widthwise direction W (for example, a direction inclined at a predetermined angle from the widthwise direction W of the absorbent article, etc.), which extends while changing at least part of the direction (for example, wave shape, zigzag shape, etc.) Existing aspect; at least partly discontinuously (that is, intermittently) extending in the widthwise direction W of the absorbent article; at least part of the interval between two adjacent protrusions is not a constant aspect; Or an aspect in which two or more of these aspects are arbitrarily combined.

In this way, by appropriately setting the direction and form of the extension of the protrusions and grooves, it is possible to arbitrarily adjust the deformation of the elongated region of the main body, etc., and it is possible to realize product design corresponding to the various behavior patterns of the wearer.

The method of forming the bellows structure described above on the back sheet is not particularly limited. For example, any method such as a vacuum forming method and a gear rolling method can be used.

In addition, in the absorbent article of the present invention, the structure in the low elongation region of the back sheet is not particularly limited. However, the back sheet is the sanitary napkin of the present embodiment as shown in FIGS. 2 and 3 It is desirable that the back sheet 23 of 1 has a substantially flat structure on both the skin surface side and the non-skin surface side in the low elongation region of the main body.

The back sheet is in the low elongation area (especially, at least the front If the low elongation region in the second region has a substantially flat structure (that is, it does not have an element of the structure that can be the starting point of bending), it is easier to maintain the shape of the main body in the low elongation region. It can more stably absorb the excretion discharged from the wearer.

In addition, in the sanitary napkin 1 of this embodiment, the above-mentioned front sheet 21 and back sheet 23 are in a state where the absorbent body 22 is sandwiched, and the outer peripheral edge of each sheet is applied with an adhesive, heat Any joining means such as sealing and ultrasonic joining are joined to each other.

In the present invention, the structure of the absorbent article is not limited to the above-mentioned embodiment. For example, an auxiliary sheet for diffusing excretion may be provided between the surface 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 embodiment, and can be appropriately combined, changed, etc. within a range that does not deviate from the purpose and spirit of the present invention.

In addition, the present invention is applicable to various absorbent articles such as sanitary pads and (light) incontinence pads in addition to the sanitary napkins of the above-mentioned embodiments. In addition, in this manual, the ordinal numbers such as "1st" and "2nd" are used to distinguish the items to which the ordinal number is assigned, and do not mean the order, priority, or importance of the items.

1: Absorbent articles

4: Adhesive part

4’: Adhesive part

5: Front edge

6: Rear edge

7: 1st end

7’: 1st end

8: 2nd end

8’: 2nd end

22: Absorber

23: back sheet

B: Snake belly structure

B ₁ : Convex

B ₂ : Groove

S: Slit part

Claims (9)

An absorbent article comprising: a longitudinally elongated body having a longitudinal direction and a widthwise direction, a pair of wings extending along one side and the other side of the widthwise direction of the body, and a quilt The absorbent article of a pair of adhesive parts for clothing fixing, arranged in each of the pair of wings, extending in the longitudinal direction, is characterized in that the main body part has: the absorbent article is installed at The front end edge in the longitudinal direction of the front side of the wearer; the absorbent article is installed at the rear end edge in the longitudinal direction of the wearer’s rear side; when viewed from above, it extends in The first imaginary straight line of the pair of first ends on the proximal side with respect to the front end edge portion of the both ends in the longitudinal direction of the pair of adhesive portions and the front end edge The first region between the first region; the second region extending between the second imaginary straight line and the first imaginary straight line that includes the central portion of each of the aforementioned pair of adhesive parts; The third region between the third imaginary straight line and the aforementioned second imaginary straight line of the pair of second ends on the proximal side of the two ends in the longitudinal direction of the adhesive portion with respect to the aforementioned rear side edge portion; And a fourth area extending between the third imaginary straight line and the rear end edge, The fourth region includes an elongated region that is at least stretchable in the longitudinal direction, and the second region includes an extension that extends across the widthwise central axis extending along the longitudinal direction of the main body in a plan view, and has a larger length than the elongated region. A low elongation in the longitudinal direction or a non-elongated low elongation area in the longitudinal direction. Furthermore, the low elongation area is provided with a length along the main body at least on both sides of the central axis in the width direction when viewed in plan view. There are a plurality of linear recesses extending in the side direction and having a bottom with a higher density than other parts. The third area has a low elongation area extending from the low elongation area of the second area, and a low elongation area relative to the low elongation area. The elongation region is located on one side and the other side in the widthwise direction of the main body, and extends from the elongation region of the fourth region. Furthermore, the low elongation region in the third region is It has a plurality of linear recesses extending from each of the plurality of linear recesses in the low elongation region in the second region. The absorbent article according to claim 1, wherein the first region includes a low elongation region extending from the low elongation region of the second region. The absorbent article described in claim 1 or 2, wherein the fourth region includes the low elongation region located between the rear edge portion and the elongation region. Such as the absorbent article described in item 1 of the scope of patent application, which In the above-mentioned body part, the liquid-permeable surface sheet on the skin surface side in the thickness direction, the liquid-impermeable back sheet on the non-skin surface side in the thickness direction, and an absorber are provided on the main body part. Between the sheets and extending from the first area to the fourth area, the absorbent body has a plurality of slits extending in the widthwise direction of the main body in the extension area. The absorbent article according to claim 4, wherein the plurality of slits are arranged in a plan view, and the slits adjacent to each other in the longitudinal direction of the main body are arranged so as to partially overlap in the longitudinal direction. The absorbent article described in item 4 or item 5 of the scope of patent application, wherein the absorbent body has, in the elongation area, a slit portion existing area where the plurality of slit portions exist, and a slit portion where the slit portion does not exist In addition, the non-existent area of the slit portion has, in a plan view, a first non-existent area extending forward from one end of the absorbent body in the widthwise direction toward the other end, and a first non-existent area corresponding to the first non-existent area. The second non-existent area that intersects and extends from one end to the other end in the widthwise direction of the absorbent body toward the rear side. The slit portion existing area exists between the first non-existent area and the second non-existent area. The area enclosed by the area. The absorbent article according to claim 4, wherein the surface sheet has a plurality of straight lines extending in the width direction and arranged at predetermined intervals in the longitudinal direction in the elongated region. The convex part; and located between adjacent convex parts, and in the aforementioned A stretchable uneven structure formed by a plurality of linear grooves extending in the widthwise direction. The absorbent article according to claim 4, wherein the back sheet has a bellows structure extending in the longitudinal direction of the main body in the elongated region. The absorbent article described in claim 4, wherein the back sheet has a substantially flat structure at least in the second region.

Images