JP2008125918A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article capable of improving an abutting property to the skin and reducing the leakage of body liquid or the like by securing a stable deformation form of an absorbent. <P>SOLUTION: The absorbent article comprises: an at least partially liquid permeable surface sheet; a liquid impermeable back surface sheet; and a liquid holding absorbent disposed between the surface sheet and the back surface sheet. The absorbent has a core part and side parts sectioned by a compressed groove continuously or intermittently formed on the surface on the surface sheet side, and at least a part of the surface sheet is formed so as to be stretched in the width direction of the absorbent article. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an absorbent article. In particular, it is related with the absorbent article excellent in adhesiveness and leak-proof property.

  Conventionally, sanitary napkins, panty liners, urine collecting pads, and the like have been used as absorbent articles for absorbing excrement such as body fluids. These absorbent articles include an absorbent body that absorbs and retains body fluids, a liquid-permeable surface sheet that covers the surface of the absorbent body on the skin contact surface side, and a non-skin contact that corresponds to the clothing side of the absorbent body. A liquid-impermeable back sheet that covers the back surface on the contact surface side, and is used in a state where it is adhered to the inner surface of an underwear crotch cloth or the like.

  By the way, normally, such an absorbent article is desired to be used in such a manner that a predetermined absorbent portion in the absorbent body is brought into close contact with the excretory portion in order to reliably capture excrement such as body fluid from the excretory portion of the wearer. It is rare. For example, when a gap is generated between the wearer's excretory part and the absorbent part at the time of wearing, excrement such as body fluid spilled on the surface sheet of the absorbent article is along the side of the absorbent article and the buttock direction This is because there is a risk of leaking out of the garment, leaking from it, and soiling the underwear and clothes.

  In particular, an absorbent article that is used by being fixed to the crotch cloth of the underwear such as a sanitary napkin is likely to cause a relative displacement between the underwear and the excretion part, and this displacement causes a side leakage. There was a thing.

  In contrast, excretion resulting from torsion of the absorbent body by forming grooves by continuously pressing the surface sheet and the absorbent body and providing the grooves on both sides in the longitudinal direction of the sanitary napkin A sanitary napkin for preventing side leakage of an object is disclosed (for example, see Patent Document 1).

In the sanitary napkin disclosed in Patent Document 1, for example, a pair of grooves are arranged so as to sandwich an absorbent core provided at a substantially central portion in the width direction of the sanitary napkin. In this groove, a high-density pressing portion having a relatively high density and a low-pressure pressing portion having a relatively low density are continuous, and is formed on the skin contact surface side of the absorbent body. Thereby, for example, when receiving a compressive force in the width direction from the wearer's thigh, the absorbent core portion is deformed into a convex shape, and the excrement is brought into contact with the wearer's excretion portion. This is intended to prevent leakage.
JP-A-9-108262

  However, the sanitary napkin disclosed in Patent Document 1 can deform the core portion into a desired convex shape by providing a groove, but the surface sheet or the like disposed on the skin contact surface side is extensible. Therefore, there is a problem that the surface sheet or the like hinders deformation of the core portion.

  The present invention has been made in view of the problems as described above, and by ensuring a stable deformed form of the absorbent body, it improves the adhesion to the wearer's skin and reduces leakage of body fluids and the like. An object of the present invention is to provide an absorbent article.

  In order to achieve the above object, the present inventors are able to effectively deform the absorbent body by imparting extensibility to the sheet member disposed on the skin contact surface side of the absorbent body. As a result, the present invention has been completed. Specifically, the following absorbent articles are provided.

  (1) A vertically long shape including at least a part of a liquid-permeable top sheet, a liquid-impermeable back sheet, and a liquid-retaining absorbent disposed between the top sheet and the back sheet. The absorbent article has a core part and side parts defined by grooves formed continuously or intermittently on the surface on the surface sheet side, and the surface sheet has at least An absorbent article, part of which is formed to be stretchable in the width direction of the absorbent article.

  Here, the term “formable to be stretched” includes, in addition to those formed to be stretchable in the width direction of the absorbent article, for example, those formed to be stretchable in the width direction of the absorbent article.

  (2) The absorbent article according to (1), wherein at least a part of the surface of the core portion on the surface sheet side is formed to be extensible in the width direction of the absorbent article.

  (3) The said surface sheet is an absorbent article as described in (1) or (2) with the higher expansion | extension rate in the width direction of the said absorbent article than the said core part.

  (4) The absorbent article according to any one of (1) to (3), wherein the top sheet has a higher stretch rate in the width direction of the absorbent article than the back sheet.

  (5) The substantially center portion of the top sheet has any one of (1) to (4) in which the stretch rate in the width direction of the absorbent article is higher than both sides of the substantially center portion in the width direction of the absorbent article. Absorbent article as described in 1.

  (6) The absorbent article according to any one of (1) to (5), wherein a predetermined space is formed between the core portion and the back sheet.

  ADVANTAGE OF THE INVENTION According to this invention, the absorptive article which can improve the adhesiveness to skin by reducing the stable deformation | transformation form of an absorber, and can reduce the leakage of a bodily fluid etc. can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, embodiment of this invention is not limited to the following Example at all, and the technical scope of this invention is not limited to this.

  In addition, the absorbent article according to the present invention is worn on the crotch part of the body for the purpose of absorbing menstrual blood, urine, urine excreted from the body, in the following embodiments, A sanitary napkin whose main purpose is to absorb menstrual blood excreted from a woman's vaginal opening will be described as an example. Moreover, let the one side orient | assigned to an excretion part among the two surfaces of an absorbent article be a skin contact surface, and let the other side of the other side be a non-skin contact surface irrespective of whether clothing is worn.

  FIG. 1 is a plan view of a sanitary napkin according to a first embodiment of the present invention. FIG. 2 is a bottom view of FIG. FIG. 3 is an explanatory view showing an XX cross section for explaining FIG. FIG. 4 is a diagram showing the apertures of each layer when the core part is deformed in a convex shape. FIGS. 5A to 5C are views showing an opening pattern. FIGS. 6A to 6E are diagrams showing other forms of the opening pattern. FIG. 7 is a diagram showing another form of the sanitary napkin according to the first embodiment. FIGS. 8A to 8E are views showing other forms of grooves. FIG. 9 is a diagram showing another form of the sanitary napkin according to the first embodiment. 10A and 10B are cross-sectional views showing a state in which the sanitary napkin and the undergarment are fixed in the groove.

  FIG. 11 is a cross-sectional view showing a state in which a sanitary napkin having side flaps is attached to underwear. FIG. 12 is a view showing a sanitary napkin according to a second embodiment of the present invention. FIGS. 13A to 13C are cross-sectional views showing other forms of the folded portion. FIG. 14 is a view showing a sanitary napkin according to a third embodiment of the present invention. FIGS. 15A and 15B are views showing another form of the stretching means in the top sheet. FIG. 16 is a diagram showing another form of the stretching means in the top sheet. FIG. 17 is a view showing a sanitary napkin according to a fourth embodiment of the present invention. FIG. 18 is a view showing a sanitary napkin according to a fifth embodiment of the present invention. FIG. 19A is a view for explaining the AA cross section of FIG. FIG. 19B is a view for explaining a BB cross section of FIG. FIG. 20 is a view showing a sanitary napkin according to a sixth embodiment of the present invention. FIG. 21 is a diagram showing another form of the sanitary napkin according to the sixth embodiment. FIG. 22 is a diagram illustrating an absorbent body having a folded portion. FIG. 23 is a diagram showing another form of the sanitary napkin according to the sixth embodiment. FIGS. 24A and 24B are views showing a deformed state of the sanitary napkin according to the sixth embodiment. FIG. 25 is a view showing a sanitary napkin according to a seventh embodiment of the present invention.

[1] 1st Embodiment The whole structure of the absorbent article of this invention is demonstrated using the sanitary napkin 1 in 1st Embodiment of this invention.

[1.1] General As shown in FIG.1 and FIG.2, the sanitary napkin 1 which is the absorbent article which concerns on 1st Embodiment of this invention is formed substantially vertically long. Examples of the length of the sanitary napkin 1 in the longitudinal direction include 150 mm to 500 mm, preferably 180 mm to 290 mm. The sanitary napkin 1 having the exemplified length can be suitably used, for example, when used at normal times (for example, for daytime use).

  Further, as shown in FIG. 3, the sanitary napkin 1 is disposed on the side of the skin contact surface that is one side in the thickness direction of the absorbent body 4 and the liquid retaining absorbent body 4 wrapped in the tissue 7. A liquid-permeable top sheet 2 and a liquid-impermeable back sheet 3 disposed on the non-skin contact surface side which is the other side in the thickness direction of the absorber 4. An adhesive portion 8 is provided on the non-skin contact surface side of the back sheet 3, and the sanitary napkin 1 is locked to the wearer's underwear using the adhesive portion 8. In the first embodiment, the sanitary napkin 1 is disposed between the top sheet 2 and the absorbent body 4, a liquid-permeable intermediate sheet 5 that forms part of the top sheet 2, and a sanitary napkin. The side sheet | seat 6 which comprises a part of 1 surface layer, and the side flaps W1 and W2 extended in the width direction of the sanitary napkin 1 are provided. The side flaps W1 and W2 are provided with an adhesive portion 9, and the sanitary napkin 1 is put on the underwear by folding the side flaps W1 and W2 to the non-skin contact surface side and engaging the crotch portion of the underwear, for example. It is attached to.

  Furthermore, the sanitary napkin 1 includes a groove 11 that is formed in a concave shape from the skin contact surface side of the top sheet 2 toward the back sheet 4, and the absorbent body 4 includes the core portion 40, the side portion 41, and the groove 11. It is divided into. Moreover, the groove | channel 11 has the high pressing part 12 formed in high pressing and the low pressing part 13 formed in low pressing so that the core part 40 formed in the approximate center part of the absorber 4 may be enclosed, for example. It is formed continuously, and mainly prevents the excrement such as menstrual blood in the absorber 4 from spreading.

  Here, excretion such as menstrual blood excreted from the excretion portion passes through the liquid-permeable region and the intermediate sheet 5 in the top sheet 2 and is absorbed by the absorber 4. Since the back sheet 3 disposed on the non-skin contact surface side is liquid-impermeable, excrement does not permeate the non-skin contact surface side and is held in a state of being absorbed by the absorber 4. It will be. Moreover, the groove | channel 11 deform | transforms the core part 40 formed in the approximate center part of the absorber 4 to convex shape, when compression force is added from a wearer's thigh. The sanitary napkin 1 prevents leakage by bringing the core portion 40 thus deformed into a convex shape into contact with the excretion portion of the wearer.

[1.2] Surface sheet The surface sheet 2 is disposed on the wearer's body when worn, and is brought into contact with the excretory part. The entire surface of the surface sheet 2 may be liquid permeable, or a part thereof may be liquid permeable. Further, it may be constituted by a single sheet member, or may be constituted by joining a plurality of sheet members. In the present embodiment, the top sheet 2 includes a liquid permeable region at a substantially central portion in the width direction of the sanitary napkin 1, and an end portion side in the width direction is covered with a liquid impermeable side sheet 6. Further, the top sheet 2 is provided with a plurality of apertures 101 extending in the longitudinal direction of the sanitary napkin 1 and penetrating in the thickness direction of the sanitary napkin 1.

Here, the surface sheet 2 can be, for example, an air-through nonwoven fabric that is relatively bulky and in which voids between fibers are formed. As a fiber structure of an air through nonwoven fabric, the synthetic fiber of a hydrophilic fiber and a hydrophobic fiber can be illustrated, for example. As the surface sheet 2 in the first embodiment, for example, a hydrophilic fiber having a hollow structure having a fineness of 2.6 dtex cut to a length of 51 mm and a hydrophobic fiber having a core-sheath structure having a fineness of 2.2 dtex are used. A non-woven fabric formed by combining 50% of the fiber length cut to 51 mm and having a basis weight of 30 g / m ² can be used.

[1.3] Intermediate sheet The intermediate sheet 5 allows the excrement that has passed through the top sheet 2 to pass through the absorbent body 4 and also functions as a cushion during use. The intermediate sheet 5 is provided with a plurality of apertures 102 that extend long in the longitudinal direction of the sanitary napkin 1 and penetrate in the thickness direction of the sanitary napkin 1. Here, the sheet member similar to the top sheet 2 can be used for the intermediate sheet 5. As the intermediate sheet 5 in the first embodiment, for example, a nonwoven fabric in which the fiber length of a hydrophilic fiber having a core-sheath structure with a fineness of 2.2 dtex is cut to 51 mm and the basis weight is 30 g / m ² can be used.

[1.4] Absorber The absorber 4 is wrapped in a tissue 7 and absorbs and retains excretion such as menstrual blood that has passed through the top sheet 2 and the intermediate sheet 5. The absorbent body 4 includes a substantially elliptical core portion 40 at a substantially central portion in the width direction of the sanitary napkin 1. The core portion 40 is a region surrounded by the groove 11. Side portions 41 are formed on both sides of the core portion 40 in the width direction. As the absorbent body 4, for example, a pulverized softwood kraft pulp blended with 10% of a superabsorbent polymer and wrapped with a tissue 7 can be used. As the absorbent body 4 in the first embodiment, for example, one having a basis weight of 400 g / m ² can be used. Moreover, as the tissue 7 including the absorbent body 4, those having a basis weight of 18 g / m ² can be used. In the present embodiment, the tissue 7 is formed with a plurality of apertures 103 extending in the longitudinal direction of the sanitary napkin 1 and penetrating in the thickness direction of the sanitary napkin 1 on the skin contact surface side. ing.

[1.5] Back sheet The back sheet 3 prevents the excrement etc. which the absorber 4 hold | maintains from leaking to a wearer's non-skin contact surface side by using a liquid-impermeable sheet | seat member. As the back sheet 3 in the first embodiment, for example, a liquid-impermeable polyethylene film having a basis weight of 27 g / m ² can be used.

[1.6] Side Sheet The side sheet 6 has a part of the top sheet 2 extending outward in the width direction of the sanitary napkin 1 and a part of the back sheet 3 extending outward in the width direction. The extended portion of the extended front sheet 2 and the extended portion of the back sheet 3 are joined by, for example, a hot melt adhesive. As the side sheet 6, for example, a polypropylene spunbond nonwoven fabric (PPSB) can be used.

[1.7] Opening [1.7.1] Shape, etc. As shown in FIGS. 3 and 4, the top sheet 2, the intermediate sheet 5, and the tissue 7 are each in the longitudinal direction of the sanitary napkin 1. A plurality of apertures 101, 102, and 103 that are elongated and substantially vertically long are provided intermittently in the width direction of the sanitary napkin 1. In other words, the opening portions 101, 102, and 103 are formed at substantially the center of the sanitary napkin 1 along the groove 11. Examples of the opening portions 101, 102, and 103 include those formed in a slit shape. Thus, by providing the opening portions 101, 102, 103 in the top sheet 2, the intermediate sheet 5, and the tissue 7, respectively, for example, when the core portion 40 is deformed into a convex shape, each opening portion 101, 102 is provided. , 103 are pulled in the width direction and can be deformed into a substantially rhombus, so that each of the top sheet 2, the intermediate sheet 5, and the tissue 7 can be expanded in the width direction. For example, when a compressive force is generated from the wearer's thigh and the core portion 40 is deformed into a convex shape, the opening portions 101, 102, and 103 are widened to form openings as shown in FIG. Thereby, it can deform | transform, without inhibiting the convex deformation of the core part 40. FIG. In order to deform the core portion 40 into a convex shape without pressing, the sheet member disposed at least on the skin contact surface side with respect to the absorbent body 4 only needs to be extensible.

  Moreover, by providing the opening portions 101, 102, 103 in the top sheet 2, the intermediate sheet 5, and the tissue 7, respectively, the sanitary napkin 1 can be stretched in the width direction or stretched. Therefore, for example, even when the core portion 40 is deformed into a convex shape by the force transmitted from the side portion 41, the absorber 4 is not compressed. Thereby, the density of the topsheet 2 and the like can be kept low. For example, even when a pressure accompanying the movement of the wearer is applied after being deformed into a convex shape, body fluid or the like is unlikely to return to the topsheet side. That is, discomfort due to rewet back can be reduced. Furthermore, since the topsheet 2 does not press the absorber 4 or the like, it is possible to reduce the return of body fluid or the like from the absorber 4 even during convex deformation.

  Here, as the opening portion 101 in the topsheet 2, for example, as shown in FIG. 5 (A), the opening portion 101 formed with a length in the longitudinal direction of 5.0 mm has a longitudinal pitch a of 3.0 mm. Examples are those arranged at a predetermined interval such that the lateral pitch b is 3.0 mm. Here, the vertical pitch refers to the interval between the apertures 101, 102, 103 in the longitudinal direction of the sanitary napkin 1, and the horizontal pitch refers to the apertures 101, 102 in the width direction of the sanitary napkin 1. , 103 intervals.

  Moreover, as the opening part 102 in the intermediate sheet 5, for example, as shown in FIG. 5B, the opening part 102 formed with a length in the longitudinal direction of 3.5 mm has a longitudinal pitch c of 2.5 mm, Examples are those arranged at a predetermined interval so that the lateral pitch d is 3.0 mm. Further, as the aperture 103 in the tissue 7, for example, as shown in FIG. 5C, the aperture 103 formed with a length in the longitudinal direction of 2.0 mm has a longitudinal pitch e of 1.5 mm and a lateral width. The thing arrange | positioned by the predetermined space | interval so that the pitch f may be 3.0 mm can be illustrated.

  In the first embodiment, as shown in FIGS. 5 (A) to 5 (C), the shape of the aperture is a substantially elongated shape extending in the longitudinal direction, and the apertures 101, 102, 103 are intermittently formed. However, the present invention is not limited to this. The sanitary napkin 1 only needs to have an opening pattern or arrangement in which the opening is widened and opened in accordance with the convex deformation of the core 40. As an opening pattern, as shown to FIG. 6 (A), the substantially cross shape formed when a longitudinally long opening part cross | intersects may be arrange | positioned with a predetermined space | interval, for example. Further, for example, as shown in FIG. 6 (B), the other opening part may be provided in a direction orthogonal to one opening part, and each may be arranged at a predetermined interval. . Further, for example, as shown in FIG. 6C, curved apertures may be arranged at a predetermined interval. Further, for example, as shown in FIG. 6D, apertures having different lengths may be arranged intermittently. Further, for example, as shown in FIG. 6 (E), the gaps between the apertures may be arranged differently in the width direction. In this case, it is preferable to arrange so that the space | interval in the width direction of each opening part becomes narrow as it goes to the both ends from the approximate center of the sanitary napkin 1. FIG.

[1.7.2] Opening lengths The lengths of the opening portions 101, 102, and 103 are obtained by making the lengths of the opening portions of the top sheet 2, the intermediate sheet 5, and the tissue 7 all the same. Although the pressing of the core portion 40 toward the non-skin contact surface side can be reduced, in order to suitably deform the core portion 40 toward the skin contact surface side, the most wearer's skin contact It is preferable to increase the elongation rate as the material is arranged on the surface side. In other words, it is preferable to extend more topsheets 2 that are arranged closest to the skin contact surface of the wearer. By enhancing the extensibility of the sheet member disposed on the skin contact surface side, the pressure on the sheet member disposed on the non-skin contact surface side is less than that of the sheet member, and the core portion 40 is easily deformed. This is because. In addition, by preventing the sheet member close to the core portion 40 from having excessive stretchability, it is possible to reduce the loss of the polymer and pulp. Therefore, in the first embodiment, the length of the aperture 101 in the top sheet 2 is the longest, the length of the aperture 102 in the intermediate sheet 5 is then increased next, and finally the absorber. By making the aperture 103 in the tissue 7 closest to 4 shorter than the other apertures 101 and 102, extensibility is improved. For example, the length in the longitudinal direction of the aperture 101 in the surface sheet 2 is 5.0 mm, the length in the longitudinal direction of the aperture 102 in the intermediate sheet 5 is 3.5 mm, and the aperture 103 in the tissue 7 is The length in the longitudinal direction can be 1.5 mm.

[1.7.3] Lateral pitch of the aperture portion The pressing of the core portion 40 toward the non-skin contact surface side is performed by the lateral pitch b, d of each aperture portion of the top sheet 2, the intermediate sheet 5, and the tissue 7. , F can also be reduced by making them all the same length. Further, for example, the lateral pitch b of the apertures 101 in the top sheet 2 is made the narrowest, the lateral pitch d of the apertures 102 in the intermediate sheet 5 is then narrowed next, and finally the absorber 4 By making the lateral pitch f of the closest tissue 7 the widest, the stretch ratio can be improved. For example, the lateral pitch b of the apertures 101 in the top sheet 2 is 2.0 mm, the lateral pitch d of the apertures 102 in the intermediate sheet 5 is 3.5 mm, and the lateral pitch f of the apertures 103 in the tissue 7 is It can be 5.0 mm.

[1.8] 15% Tensile Strength of Sheet Member The 15% tensile strength of each sheet member in the first embodiment is, for example, 0.09 N / inch for the top sheet 2 and 0.13 N / inch for the intermediate sheet 5. The tissue 7 may be 0.4 N / inch, and the back sheet 3 may be 4.2 N / inch. The 15% tensile strength means that the elongation of each sheet member when the sanitary napkin 1 is deformed in a convex shape toward the skin contact surface of the wearer is 15%, and the tensile strength in this case is measured. It is a thing.

  The 15% tensile strength of the top sheet 2 is preferably in the range of 0.01 N / inch to 0.2 N / inch, for example. More preferably, a range of 0.01 N / inch to 0.15 N / inch can be exemplified. More preferably, a range of 0.01 N / inch to 0.1 N / inch can be exemplified. This is because if it is 0.01 N / inch or less, it may be easily broken when the wearer moves and the skin of the wearer and the topsheet 2 rub against each other. Moreover, it is because there exists a possibility of causing the deformation | transformation of the core part 40 as it is 0.2 N / inch or more.

  As the 15% tensile strength in the relationship between the topsheet 2 and the tissue 7, for example, the value of 15% tensile strength of the tissue 7/15% tensile strength of the topsheet 2 is in the range of 0.5 to 10.0. Preferably there is. More preferably, the value of 15% tensile strength of the tissue 7/15% tensile strength of the top sheet 2 is in the range of 1.0 to 6.0.

  Furthermore, as the 15% tensile strength in the relationship between the top sheet 2 and the back sheet 3, for example, the value of 15% tensile strength of the back sheet 3/15% tensile strength of the top sheet 2 is preferably 10 or more. More preferably, the value of 15% tensile strength of the back sheet 3/15% tensile strength of the top sheet 2 is 15 or more. In the case of 10 or less, since the difference in strength is too small, there is a possibility that deformation to the skin contact surface side may be hindered.

[1.9] Groove The sanitary napkin 1 is formed by continuously squeezing the top sheet 2 and the absorbent body 4 from the skin contact surface side, and the absorbent body 4 is divided into a core part 40 and a side part 41. Groove 11 is provided. For example, as shown in FIG. 7, the groove 11 has a protruding portion 15 that protrudes toward the non-skin contact surface side in the thickness direction of the absorber 4. The protruding portion 15 is preferably formed so as to protrude toward the non-skin contact surface side with respect to the core portion back surface 42 of the core portion 40. For example, when the core portion 40 is deformed into a convex shape by applying a compressive force in the width direction from the wearer's thigh, the projecting portion 15 can sink into the core portion back surface 42 of the core portion 40. Therefore, the convex deformation of the core portion 40 is facilitated.

  The groove 11 is formed by continuously squeezing each of high pressure and low pressure. That is, the groove | channel 11 is equipped with the recessed part 12 by high pressing and the convex part 13 by low pressing. For example, the recess 12 may be formed in a substantially square shape having a width of 2 mm and a length of 0.7 mm. The convex portion 13 may be formed in a substantially cubic shape having a width of 2 mm, a length of 1.0 mm, and a height of 1 mm. Here, the width in the concave portion 12 and the convex portion 13 refers to the distance in the width direction, and the length refers to the distance in the longitudinal direction. Moreover, the height in the convex part 13 means the distance in the thickness direction. In the groove 11, the concave portion 12 and the convex portion 13 formed in this way are continuously formed.

  In addition, in this embodiment, although the groove | channel 11 is continuously formed in the bottom part by the recessed part 12 by high pressing and the convex part 13 by low pressing, respectively, in this invention, it is restricted to this. Absent. For example, as shown to FIG. 8 (A), the groove | channel 11 may be formed only by the recessed part 12 by high pressing, and may comprise a shape of fixed height without an unevenness | corrugation. Further, as shown in FIG. 8B, the groove 11 may be provided with the recess 12 in a part of the groove width instead of providing the recess 12 in the entire groove width in the width direction of the groove 11. Further, as shown in FIG. 8C, the groove 11 may be provided with the convex portion 13 in a part of the groove width instead of providing the convex portion 13 over the entire groove width in the width direction of the groove 11. . Further, as shown in FIG. 8D, the concave portion 12 or the convex portion 13 may be formed into a substantially cylindrical shape and configured in a dot shape. In addition, in this invention, the recessed part 12 by high pressing shown in FIG. 8 (A) to (D) and the convex part 13 by low pressing may each be set as the structure arrange | positioned reversely.

  Further, as shown in FIG. 8E, the groove 11 may be provided with an opening 17 in the recess 12. By providing the opening 17 in the recess 12, for example, excretion such as menstrual blood transmitted from the top sheet 2 can be dropped into the back sheet 3 provided on the non-skin contact surface side which is the lower layer of the core part 40. This is because the diffusion of excrement can be suppressed in the surface layer including the surface sheet 2. In FIG. 8E, the opening 17 is provided in the concave portion 12, but the opening 17 may be provided in the convex portion 13. This is because the same effect can be obtained even when the opening 17 is provided in the convex portion 13.

  Further, for example, the groove 11 may be provided with an opening (not shown) in the wall portion 14. In this case as well, the excrement transmitted from the top sheet 2 can be dropped into the back sheet 3 provided on the non-skin contact surface side, which is the lower layer of the core portion 40. In addition, it is preferable that the opening provided in a wall part is a magnitude | size which is a grade which a wall part is not parted at the time of pressing.

[1.10] Joining of Sheet Members Having Stretched Parts Each of the top sheet 2, the intermediate sheet 5, and the tissue 7 is joined by a spiral hot melt adhesive so as not to hinder the stretchability in the width direction. It is preferable. Further, for example, it may be joined by a coating applied by spraying or the like, or a striped hot melt adhesive extending in the longitudinal direction. Furthermore, for example, as shown in FIG. 9, each of the top sheet 2, the intermediate sheet 5, and the tissue 7 may be joined by embossing between the respective opening portions 101 with a predetermined emboss 114. In this case, as the shape of the emboss 114, in addition to the substantially circular shape illustrated in FIG. 9, for example, a polygon, an ellipse, a vertically long shape, a star shape, or the like may be formed. Note that it is preferable that the joining in the width direction is not continuously joined in consideration of the possibility of inhibiting the extensibility.

[1.11] Locking with Locked Body As shown in FIG. 10A, the adhesive portion 8 for preventing slippage is disposed on the non-skin contact surface side of the groove 11 in the back sheet 3, and It is preferable to fix with the underwear 50 which is a locking body. This is because the groove 11 can induce a convex deformation toward the skin contact surface side of the core portion 40 as shown in FIG.

[1.12] Flap portion In the present embodiment, the sanitary napkin 1 extends in the width direction in a part of the surface layer as the side sheet 6 and part of the back sheet 3 extends in the width direction. And side flaps W1 and W2 formed by joining these extended portions with a hot melt adhesive. As shown in FIG. 11, the sanitary napkin 1 is joined to the undergarment 50 by folding the side flaps W1 and W2 into, for example, a crotch cloth of the undergarment 50 that is a locked body on the non-skin contact surface side. . Accordingly, for example, when a compressive force is applied in the width direction from the wearer's thigh, the movement of the side portion 41 in the thickness direction is restricted, so that stable convex deformation is possible. In the present embodiment, the pair of side flaps W1 and W2 are provided. However, the present invention is not limited to this, and the side flaps W1 and W2 may be omitted. A plurality of side flaps may be provided.

[2] Other Embodiments The second to seventh embodiments of the present invention will be described with reference to FIGS. 2nd Embodiment shows other embodiment which provided the folding | turning part 21 in the surface sheet 2 grade | etc.,. 3rd Embodiment shows other embodiment which gave the corrugated embossing to the surface sheet 2 grade | etc.,. The fourth embodiment shows another embodiment in which various stretching processes are combined with the top sheet 2 or the like. 5th Embodiment shows other embodiment at the time of using for the sanitary napkin for nights. 6th Embodiment shows other embodiment which folds back and uses the side part 41 for the non-skin contact surface side. 7th Embodiment shows other embodiment which forms the groove | channel 11 only in the absorber 4. FIG.

  In the following embodiments, parts that are not particularly described are the same as those in the first embodiment, and the same reference numerals are given to the numbers given in the drawings if they are the same as those in the first embodiment.

[2.1] Second Embodiment A sanitary napkin 1B according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 12, the sanitary napkin 1 </ b> B according to the second embodiment is different from the first embodiment in that the folded portions 21 and 71 are provided at substantially the center in the width direction of the topsheet 2 and the tissue 7. Specifically, the sanitary napkin 1B is formed by folding the sanitary napkin 1B approximately in the center in the width direction of the top sheet 2 and the tissue 7 in a direction opposite to each other from a substantially center line in the width direction that bisects the sanitary napkin 1B. Folded portions 21 and 71 having tacks are provided to provide extensibility.

  As described above, the sanitary napkin 1B is provided with the folded portions 21 and 71. For example, even when the core portion 40 is deformed in a convex shape toward the skin contact surface, the skin contact surface side of the core portion 40 is provided. When the tacks of the folded-back portions 21 and 71 disposed in the are released, the top sheet 2 and the tissue 7 can be expanded in the width direction. Thereby, the core part 40 can be easily deformed in a convex shape without being pushed back by the top sheet 2 and the tissue 7. In addition, unlike the case of providing an opening, since no opening is formed during convex deformation, for example, the material of the core part 40 can be held without leaking from the opening of the tissue 7. Note that the folded portions 21 and 71 may be formed only by non-joined folding, and a part of the folded portion may be weakly joined by embossing or the like, for example.

  In the second embodiment, the sanitary napkin 1B has the folded portions 21 and 71 provided at the substantially center in the width direction. However, the present invention is not limited to this. For example, the folded portions 21 and 71 may be provided at least on the skin contact surface side of the core portion 40.

  In the second embodiment, the folded portions 21 and 71 are formed to have a pair of tacks formed by folding the sanitary napkin 1B in a direction opposite to each other from a substantially center line in the width direction. However, the present invention is not limited to this. For example, the folded portion may have a shape as shown in FIGS. 13 (A) to 13 (C). Specifically, as shown in FIG. 13A, a plurality of tacks 21a in which a part of the topsheet 2 is folded back by a predetermined amount in the same direction may be provided. Further, as shown in FIG. 13B, the tacks 21a and 22 having different folding amounts may be formed by folding a predetermined amount in the same direction. Further, as shown in FIG. 13C, the tacks 21a and 23 may be formed so as to face different directions.

  In the second embodiment, the folded portions 21 and 71 are provided on the top sheet 2 and the tissue 7 disposed on the skin contact surface side of the core portion 40, but the present invention is not limited to this. For example, in the case where other sheet members are disposed on the skin contact surface side of the core portion 40, the sheet member may be provided with a folding portion to provide extensibility.

[2.2] Third Embodiment A sanitary napkin 1C according to a third embodiment of the present invention will be described with reference to FIG. As shown in FIG. 14, the sanitary napkin 1 </ b> C according to the third embodiment is different from the first embodiment in that corrugated embossing is performed on the top sheet 2 and the tissue 7. Specifically, the top sheet 2 and the tissue 7 are configured to be stretchable by adding chevron-shaped bite-type embossing.

  As described above, the sanitary napkin 1C is provided with the topsheet 2 and the tissue 7 even when the core portion 40 is deformed convexly toward the skin contact surface side by embossing the topsheet 2 and the tissue 7. 7 can be extended by corrugated embossing. Thereby, the sanitary napkin 1C can be easily deformed in a convex shape without the core portion 40 being pushed back to the top sheet 2 and the tissue 7. Further, in the embossed portion, a portion where the basis weight of the topsheet 2 and the tissue 7 is reduced is formed by the embossing, so that it is possible to improve the permeability of excrement such as menstrual blood.

  In the third embodiment, the sanitary napkin 1C is configured to be stretchable in the width direction by applying a corrugated shaping process to the top sheet 2 and the tissue 7, but is not limited to this in the present invention. . For example, as shown in FIG. 15A, an opening 101 may be provided between the convex portions of the corrugated emboss. Further, as shown in FIG. 15B, a configuration may be adopted in which corrugated embossing with different heights in the thickness direction of the convex portions is performed and an opening 101 is provided between the convex portions. . Further, instead of the opening 101, a circular dot-shaped hole (not shown) may be provided.

  The sanitary napkin 1C has a configuration in which, for example, the topsheet 2 and the tissue 7 are made extensible by providing an opening 101 between the folded portions 21 in the second embodiment, as shown in FIG. It is good. As described above, the sanitary napkin 1B according to the second embodiment and the sanitary napkin 1C according to the third embodiment may be configured so as to be stretchable by combining each other in the stretching means.

  In addition to processing the topsheet 2 and the tissue 7, the topsheet 2 or the tissue 7 itself may have a stretchability in the width direction or a stretchability in advance. For example, the surface sheet 2 and the tissue 7 itself are made of a coiled crimped fiber, a stretchable fiber such as urethane, or the surface sheet 2 and the tissue 7 are reduced in the number of fusion points to be easily stretched in the width direction. May be. Further, by increasing the fiber orientation in the longitudinal direction, the tensile strength in the width direction may be reduced to provide extensibility. Furthermore, a fiber assembly having a high degree of elongation may be used.

[2.3] Fourth Embodiment A sanitary napkin 1D according to a fourth embodiment of the present invention will be described with reference to FIG. As shown in FIG. 17, the sanitary napkin 1D according to the fourth embodiment differs from the first embodiment in that various stretching processes are combined with each sheet member. Specifically, the sanitary napkin 1D is provided with extensibility by performing corrugated embossing on the top sheet 2, providing the opening portion 102 in the intermediate sheet 5, and providing the folded portion 71 in the tissue 7. It is configured.

  As described above, the sanitary napkin 1D according to the fourth embodiment is used by combining the expansion means used in the second embodiment and the third embodiment. Note that the combination of expansion means is not limited to the above, and any combination having any expansion means may be used.

[2.4] Fifth Embodiment A sanitary napkin 1E according to a fifth embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 18, the sanitary napkin 1E is a sanitary napkin that is longer in the longitudinal direction and longer in the rear side than the sanitary napkin 1 according to the first embodiment. Therefore, it is different from the first embodiment. The sanitary napkin 1E is long enough to cover the tailbone so that it can be used suitably, for example, at the time of sleeping. An example of the length of the sanitary napkin 1E in the longitudinal direction is 250 mm or more. Preferably, a range of 290 mm to 420 mm can be exemplified. More preferably, the range of 330 mm to 400 mm can be illustrated.

  Moreover, as shown to FIG. 19 (A) and (B), in addition to the groove | channel 11 surrounding the core part 40, the sanitary napkin 1E which concerns on 5th Embodiment is further equipped with the groove | channel 11a on the width direction outer side. . Thus, by providing the grooves 11 and 11a double, a space for temporarily storing excrement flowing on the surface can be formed between the grooves 11 and 11a. The number and shape of the grooves 11a are not limited to those shown in the fifth embodiment. For example, the grooves 11 and 11a may be provided in triplicate.

  The sanitary napkin 1E is provided with a groove 11 across the longitudinal center line L of the sanitary napkin 1E on the wearer's buttocks side. Thereby, at the time of wearing, when the groove 11 is deformed by pressure from the wearer's buttocks, the core portion 40 on the buttocks side can also be deformed into a convex shape. Therefore, it is possible to prevent excrement and the like leaking through the buttocks with the core portion 40 deformed into a convex shape. In this case as well, it goes without saying that the sheet member disposed on the skin contact surface side of the core portion 40 has extensibility.

  Furthermore, the sanitary napkin 1E according to the fifth embodiment is provided with a leak-proof wall formed by an elastic member and a leak-proof sheet, so-called leg gather 91. The leakproof sheet extends in the width direction of the sanitary napkin 1 </ b> E and constitutes a side sheet 6 that is a part of the topsheet 2.

  The leak-proof sheet is disposed on the skin contact surface side of the top sheet 2 so as to form the leg gather 91 in a state of being attached to the body. The leak-proof sheet is mainly excrement such as menstrual blood excreted from the excretion part, and prevents leakage of excrement flowing on the skin contact surface side of the top sheet 2. Here, the leak-proof sheet includes, for example, a stretchable material such as a polymer elastic resin, thereby forming a leg gather 91 that can flexibly respond to the movement of the body when worn. The leakproof sheet may form the leg gathers 91 by disposing an elastic member such as rubber on the leakproof sheet. Moreover, the leakproof sheet may extend to the end side in the width direction of the sanitary napkin 1 </ b> E to constitute the side sheet 6 that is a part of the topsheet 2.

  Examples of the leak-proof sheet include spunbond nonwoven fabric and point bond nonwoven fabric, and those having a water repellent treatment applied thereto can be used. Among these, an SMS (spunbond / meltblown / spunbond) non-woven fabric including a meltblown composed of ultrafine fibers and having a very small interfiber distance is preferable.

  The leg gather 91 is provided with a leak-proof sheet on the skin contact surface side of the side sheet 6 so as to extend in the width direction of the sanitary napkin 1E, and at least one elastic member is provided at the end in the width direction of the leak-proof sheet. The members are arranged along the longitudinal direction and fixed by hot melt or the like. Here, the leak-proof sheet may be in a state of extending in the width direction of the sanitary napkin 1E, folded back toward the center of the sanitary napkin 1E in the width direction, and the folded portion of the sanitary napkin 1E. It may be arranged on the skin contact surface side.

  In the fifth embodiment, the leg gather 91 uses the leg gather 91 having a Σ-shaped cross section, but the present invention is not limited to this. For example, leg gathers 91 having any shape such as a T-shaped, Y-shaped, L-shaped, and hollow dome-shaped cross section can be used.

[2.5] Sixth Embodiment A sanitary napkin 1F according to a sixth embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 20, the sanitary napkin 1F is different from the first embodiment in that the side portion 41 of the absorbent body 4 is folded back to the non-skin contact surface side. Specifically, in the sanitary napkin 1F, each of the side portions 41 of the absorbent body 4 is folded back to the center side in the width direction of the absorbent body 4 and to the non-skin contact surface side in the thickness direction. Thereby, the height of the side portion 41 in the thickness direction is higher than that of the core portion 40, and the space portion 43 is formed between the core portion 40 and the back sheet 3.

  Thus, by forming the space part 43 between the core part 40 and the back surface sheet 3, as shown in FIG. 24 (A), for example, by the compressive force from the wearer's thigh, the width direction When stress is generated from the center toward the center, the folded portion of the side portion 41 of the absorber 4 can enter the space portion 43 as shown in FIG. Accordingly, it is possible to restrict the core portion 40 from being deformed in a concave shape toward the non-skin contact surface side, and to induce a convex deformation of the core portion 40 toward the skin contact surface side.

  In addition, in 6th Embodiment, although the space part 43 was formed between the core part 40 and the back surface sheet 3 by folding the side part 41 in the center direction, in this invention, it is not restricted to this. For example, the basis weight of the core part 40 may be lowered, and the predetermined space part 43 may be formed between the core part 40 and the back sheet 3. In addition, as shown in FIG. 21, by changing the weight of the side portion 41 to increase the weight of the side portion 41 and adjusting the height in the thickness direction of the side portion 41, You may form the space part 43 in this.

  In the sixth embodiment, the side portion 41 is folded back in the central direction in the entire region in the longitudinal direction. However, the present invention is not limited to this. For example, as shown in FIG. 22, the folded portion 44 of the side portion 41 may be folded not only at the entire area of the side portion 41 but also at least a part thereof. For example, the folding portion 44 may be folded back at a position corresponding to a substantially central portion.

  In the sixth embodiment, the side portion 41 is folded back so as to extend to a position beyond the groove 11 toward the approximate center of the absorber 4, but the present invention is not limited to this. For example, as shown in FIG. 23, the side portion 41 may be folded back to approximately the vicinity of the center in the width direction. Thus, by folding the side portion 41 to the vicinity of the center in the width direction, it is possible to prevent the deformation to the non-skin contact surface side when the core portion 40 is deformed. Can be induced to deform. Moreover, since the extended side part 41 will push up the core part 40 to the skin contact surface side, the core part 40 can be more easily deformed into a convex shape.

[2.6] Seventh Embodiment A sanitary napkin 1G according to a seventh embodiment of the present invention will be described with reference to FIG. As shown in FIG. 25, the sanitary napkin 1G is different from the first embodiment in that it does not squeeze the topsheet 2 together with the absorbent body 4 and has stretching means at both ends in the width direction of the topsheet 2. Specifically, the sanitary napkin 1G forms the groove 11 by squeezing only the absorbent body 4, and performs corrugated embossing on the skin contact surface side of the side portion 41 outside the groove 11. The surface sheet 2 is disposed.

  As described above, the sanitary napkin 1G has no extension means on the surface sheet 2 disposed on the skin contact surface side of the core portion 40 of the absorbent body 4, and in the side portions 41 that are both sides of the surface sheet 2. An extension means is provided in the surface sheet 2 arranged on the skin contact surface side. Thereby, the surface sheet 2 on the skin contact surface side of the core portion 40 does not expand, but the surface sheet 2 on the skin contact surface side of the side portion 41 expands, so that the core portion 40 is easily deformed into a convex shape. be able to. Moreover, since it is set as the structure which does not provide an extending | stretching means in the surface sheet 2 in the skin contact surface side of the core part 40, the intensity | strength in the said part is fully maintained and the tear and fluff by contact with a wearer's skin are suppressed. It becomes possible. In addition, even if a high-rigidity portion is formed on the skin contact surface side of the topsheet 2 during processing such as corrugation, the excretion portion of the wearer and the high-rigidity portion are not in direct contact with each other. It becomes possible to improve the property.

[3] Each component Each component is described below.

[3.1] Surface sheet

  As the top sheet 2, a liquid permeable sheet constituting all or part of the top sheet 2 can be used. Examples of the material used for the surface sheet 2 include a resin film in which a large number of liquid permeable holes similar to the liquid permeable region constituting all or part of the surface sheet 2 are formed, and a net-like sheet having a large number of meshes. Examples thereof include a liquid-permeable nonwoven fabric or a woven fabric. As the resin film or net-like sheet, for example, those formed of polypropylene (PP), polyethylene (PE), polyethylene terephthalate (PET), or the like can be used. Moreover, as a nonwoven fabric, the spunlace nonwoven fabric formed from cellulose fibers, such as rayon, a synthetic resin fiber, etc., the air through nonwoven fabric formed from the said synthetic resin fiber, etc. can be used, for example. As a fiber configuration of the air-through nonwoven fabric in which voids between fibers are formed inside, for example, synthetic fibers of hydrophilic fibers and hydrophobic fibers can be used.

  In consideration of the drawability of the liquid, the topsheet 2 has a dense gradient in which a portion of the topsheet 2 having a higher density than the surroundings is disposed, or the topsheet 2 itself has a sparse and dense gradient. It is preferable to apply a material having a difference in hydrophilicity.

  Examples of the hydrophilic fiber include a fiber having a hollow structure, an inner layer of the fiber being polyethylene terephthalate, and an outer layer of the fiber being high-density polyethylene. Examples of hydrophilic fibers include natural cellulose fibers such as cotton and rayon.

  Moreover, as a hydrophobic fiber, it is a fiber which has a core-sheath structure, a core part is filled with polyethylene terephthalate, and a fiber such as polyethylene having a high density sheath can be exemplified. The hydrophobic fiber may be kneaded or coated with a hydrophilic agent or a water repellent in consideration of liquid penetration and rewetting. Further, hydrophilicity may be added by corona treatment or plasma treatment.

  Moreover, the top sheet 2 may contain an inorganic filler such as titanium oxide, barium sulfate, or calcium carbonate in order to make it cloudy. In the case of a fiber having a core-sheath structure, it may be contained only in the core or in the sheath. Preferably, it is preferably contained only in the core. This is because the titanium oxide is less likely to be biased in the portion exhibiting whiteness when it is contained only in the core portion.

  In the present embodiment, the constituent resin of the topsheet 2 is formed using a composite type fiber of polyethylene terephthalate and high-density polyethylene, which are thermoplastic resins. However, the present invention is not limited to this. For example, a low-density polyethylene, a high-density polyethylene, a linear polyethylene, a polypropylene, a polyethylene terephthalate, a modified polypropylene, a modified polyethylene terephthalate, a nylon, etc. may be used, and each resin may be used alone or in combination. Good.

  Cellulose hydrophilic fibers such as pulp, chemical pulp, rayon, acetate, and natural cotton may be included to absorb a small amount of menstrual blood or sweat that remains on the skin. In addition, since it is hard to discharge | emit the liquid which once absorbed, the cellulose fiber is mixed in the intermediate sheet 5, or it is preferable that the surface sheet 2 consists of multiple layers and mixes in layers other than the outermost layer.

  In this embodiment, a non-woven fabric formed by combining a fiber having a fineness of 2.6 dtex and a fiber having a 2.2 dtex is used. However, the present invention is not limited to this, and the fineness is 0.1. To 8.9 dtex may be used alone or in combination. Preferably, it is 1.1 to 5.6 dtex. This is because if the fineness is 0.1 dtex or less, the density between the fibers becomes too high, and the body fluid is easily retained. In addition, if the fineness is 8.9 dtex or more, the fibers become hard and the touch becomes worse.

  In the present embodiment, a concentric core-sheath structure is adopted as the fiber shape, but the present invention is not limited to this. For example, an eccentric core-sheath structure, a side-by-side structure, a flat fiber, a Y-shape, a C-shape or the like may be used. Moreover, the fiber divided | segmented by physical loads, such as a water flow, a heat | fever, and embossing, may be contained in this. In addition, as a fiber used on the skin contact surface side, so-called surface sheet 2, in order to maintain a soft bulk while preventing fiber fluffing by heat fusion, the core is a polyethylene terephthalate and the sheath is a polyethylene core. A sheath structure is preferred.

  As a component, the kind of fiber may be single and may mix 3 or more types of some fiber. In order to deform the absorbent body into a convex shape, the difference between the distance on the skin contact surface side and the distance on the non-skin contact surface side between the fixed portions can be made, so that the surface sheet 2 positioned above the absorption layer and As the intermediate sheet 5, it is preferable to use a sheet that has a reduced number of crimped fibers and fusion points between the fibers and that is easily widened in the width direction.

In the present embodiment, those having a basis weight of 30 g / m ² are used, but the present invention is not limited to this. For example, those having a basis weight in the range of 5 g / m ² to 80 g / m ² may be used. Preferably, those having a basis weight of 20 g / m ² to 60 g / m ² can be used. If the basis weight is 5 g / m ² or less, sufficient sheet strength may not be obtained, and the sheet may be broken. If the basis weight is 80 g / m ² or more, the sheet is too rigid, and is raised upward. This is because it becomes difficult.

  As a manufacturing method of the surface sheet 2, the nonwoven fabric formed by the through-air method using the web laminated | stacked by the card | curd method was used, However, It is not restricted to this in this invention. For example, lamination by an air raid method may be used, and a nonwoven fabric formed by a spunbond method, a spunlace method, a point bond, a needle punch, or the like may be used. More preferably, the through-air method is preferable in consideration of the touch and the liquid permeability.

[3.2] Intermediate sheet The intermediate sheet 5 is disposed between the top sheet 2 and the absorbent body 4 and serves as a support for the absorbent body 4, while the absorbent body 4 has flexibility and shape stability. Is a liquid-permeable sheet that imparts As a material used for the intermediate sheet 5, the same material as the top sheet 2 can be used. The intermediate sheet 5 has a sparse / dense gradient in which a part of the intermediate sheet 5 having a higher density than the surroundings is disposed in consideration of the drawability of the liquid, and the intermediate sheet 5 itself has a sparse and dense gradient. It is preferable to apply a material having a difference in hydrophilicity.

[3.3] Absorber As the material used for the absorber 4, a material obtained by pulverizing softwood kraft pulp and 10% blend of a superabsorbent polymer wrapped in a tissue 7 was used. However, it is not limited to this. For example, the absorbent body 4 is a mixture of pulverized pulp blended with heat-fusible synthetic fibers, a sheet-like material such as air raid or pulp, spunlace nonwoven fabric made of cotton, rayon, pulp, or the like. A thing may be used. Moreover, you may use elastic urethane, a cellulose sponge, etc. In addition, in this invention, it is not limited to what was mentioned above or the thing by this combination, What is necessary is just to be normally used as an absorber.

  In addition, although the absorber 4 which concerns on this invention can change the shape and structure of the absorber 4 as needed, the total absorption amount of the absorber 4 is the design insertion amount as the sanitary napkin 1, and a desired amount. It is necessary to correspond to the application. Further, the size, absorption capacity, etc. of the absorber 4 are changed corresponding to the wearer from infants to adults.

[3.4] Back Sheet The back sheet 3 is made of a material that can prevent excrement absorbed by the absorber 4 from leaking outside. In addition, by using a moisture-permeable material, it is possible to reduce stuffiness at the time of wearing, and to reduce discomfort at the time of wearing. As such a material, a liquid-impermeable polyethylene (PE) sheet is used as the back sheet 3 in the present embodiment, but the present invention is not limited to this. For example, a resin film obtained by combining one or two or more of polyethylene (PE), polypropylene (PP), polyethylene terephthalate (PET), and EVA resin, and a filler is added to the resin film and stretched to make it fine Alternatively, a sheet in which a hole is formed and moisture permeability is added, or a laminate of a resin and paper, or a sheet in which a nonwoven fabric and a resin film are laminated may be used. Preferably, a hydrophobic nonwoven fabric, a water-impermeable plastic film, a laminate sheet portion of a nonwoven fabric and a water-impermeable plastic film, or the like can be used. Alternatively, an SMS nonwoven fabric in which a melt-blown nonwoven fabric having high water resistance is sandwiched between strong spunbond nonwoven fabrics may be used. More preferably, it is preferably a highly stretchable material. For example, a water-repellent nonwoven fabric or a latent heat-crimped fiber formed of stretchable urethane is heated to form a coil, thereby providing stretchability. You may use what gave the water-repellent process to the thing.

[3.5] Adhesive body The adhesive body in the anti-slip adhesive section 8 and the adhesive section 9 uses a rubber-based hot melt, but is not limited to this in the present invention. For example, an olefin-based hot melt, a mechanical fastener, A styrene rubber-based anti-slip agent or the like may be used.

It is a top view of the sanitary napkin which concerns on 1st Embodiment of this invention. It is a bottom view of FIG. It is explanatory drawing which shows the XX cross section for demonstrating FIG. It is a figure which shows the opening part of each layer at the time of the convex-shaped deformation | transformation of a core part. It is a figure which shows an opening pattern. It is a figure which shows the other form of an aperture pattern. It is a figure which shows the other form of the sanitary napkin which concerns on 1st Embodiment. It is a figure which shows the other form of a groove | channel. It is a figure which shows the other form of the sanitary napkin which concerns on 1st Embodiment. It is sectional drawing which shows the state which fixed the sanitary napkin and the undergarment in the groove | channel. It is sectional drawing which shows the state which mounted | wore with the sanitary napkin which has a side flap. It is a figure which shows the sanitary napkin which concerns on 2nd Embodiment of this invention. It is sectional drawing which shows the other form of a folding | turning part. It is a figure which shows the sanitary napkin which concerns on 3rd Embodiment of this invention. It is a figure which shows the other form of the expansion | extension means in a surface sheet. It is a figure which shows the other form of the expansion | extension means in a surface sheet. It is a figure which shows the sanitary napkin which concerns on 4th Embodiment of this invention. It is a figure which shows the sanitary napkin which concerns on 5th Embodiment of this invention. It is a figure for demonstrating the cross section of FIG. It is a figure which shows the sanitary napkin which concerns on 6th Embodiment of this invention. It is a figure which shows the other form of the sanitary napkin which concerns on 6th Embodiment. It is a figure which shows the absorber which has a folding | returning part. It is a figure which shows the other form of the sanitary napkin which concerns on 6th Embodiment. It is a figure which shows the deformation | transformation state of the sanitary napkin which concerns on 6th Embodiment. It is a figure which shows the sanitary napkin which concerns on 7th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Sanitary napkin 2 Top sheet 3 Back sheet 4 Absorber 5 Intermediate sheet 6 Side sheet 7 Tissue 11 Groove 40 Core part 41 Side part W1, W2 Side flap

Claims (6)

At least a part of the liquid-permeable surface sheet;
A liquid-impermeable back sheet,
A vertically long absorbent article comprising a liquid retaining absorbent disposed between the top sheet and the back sheet,
The absorber has a core part and side parts defined by grooves formed continuously or intermittently on the surface on the top sheet side,
The said surface sheet is an absorbent article in which at least a part thereof is formed so as to be stretchable in the width direction of the absorbent article.   2. The absorbent article according to claim 1, wherein at least a part of a surface of the core portion on the surface sheet side is formed to be stretchable in a width direction of the absorbent article.   The absorbent article according to claim 1 or 2, wherein the surface sheet has a higher elongation rate in the width direction of the absorbent article than the core portion.   The absorbent article according to any one of claims 1 to 3, wherein the top sheet has a higher stretch rate in the width direction of the absorbent article than the back sheet.   The absorptivity according to any one of claims 1 to 4, wherein the substantially central portion of the surface sheet has a higher stretch rate in the width direction of the absorbent article than both sides of the substantially center portion in the width direction of the absorbent article. Goods. The absorbent article according to any one of claims 1 to 5, wherein a predetermined space is formed between the core portion and the back sheet.

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