JP6030930B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article including an absorbent body including a superabsorbent polymer.

  Patent Document 1 discloses an absorption comprising a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body disposed between the top sheet and the back sheet and having an absorbent polymer material. A sex product is disclosed. The absorber of patent document 1 has the 1st pulp layer by the side of a surface sheet, and the 2nd pulp layer by the side of a back surface, and has high absorbency between a 1st pulp layer and a 2nd pulp layer. Molecular material is placed (see paragraph 0020 and FIG. 4).

  According to the absorbent article configured as described above, the absorbent disposed inside the absorber while maintaining the body fluid drawability without arranging the absorbent polymer material on the top sheet side of the absorber. The absorption capacity can be increased by the functional polymer material, and leakage of body fluid can be suppressed.

JP 2002-315781 A

  However, the absorbent article described in Patent Document 1 has the following problems.

  An absorptive polymer material is granular and is easy to move in the absorbent body compared to fibers such as pulp. Therefore, the absorbent polymer material may move in the absorbent body during the transport process of the absorbent article or when the absorbent article is worn, and the absorbent polymer material may be unevenly arranged.

  If the absorbent polymer material is arranged unevenly, the absorption rate of the body fluid in the part is lowered, and the absorption performance may be deteriorated. Further, the absorbent polymer material is granular and hard compared to the fiber. For this reason, when the absorbent polymer material is arranged in an uneven manner, the portion becomes hard and the wearing feeling may be deteriorated.

  Then, an object of this invention is to provide the absorbent article which can suppress the deterioration of a wearing feeling, ensuring the absorption performance of an absorber.

In order to solve the above-described problems, an absorbent article according to the present disclosure is provided with a liquid-permeable top sheet, a liquid-impermeable back sheet, and between the top sheet and the back sheet, and a fiber. And an absorbent body including a superabsorbent polymer, wherein the absorbent body is an absorbent article in which a plurality of compressed parts obtained by compressing the absorbent body in the thickness direction are formed, and the absorbent body is disposed in the thickness direction. When the skin is divided into a skin side area, a central area, and a non-skin side area, the central area has a higher density of the superabsorbent polymer than the skin side area and the non-skin side area, The first pressing portion extending in the first inclined direction intersecting the longitudinal direction and the width direction of the absorbent article, and the second inclination intersecting the first inclined direction and intersecting the longitudinal direction and the width direction. A second pressing part extending in the direction, and the first pressing part and The second pressing parts are alternately formed along a first direction that is one of the longitudinal direction and the width direction, and alternately spaced apart along a second direction orthogonal to the first direction. An area between the first pressing part and the second pressing part that is formed and adjacent in the first direction, and between the first pressing part and the second pressing part that are adjacent in the second direction. In this area, there is a non-squeezed area where no squeezed part is formed,
The length of the first pressing part in the first direction is longer than the length of the first pressing part in the second direction, and the length of the second pressing part in the first direction is the second pressing part. The gist is that the length of the portion is longer than the length in the second direction.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can suppress deterioration of a feeling of mounting can be provided, ensuring the absorption performance of an absorber.

It is a top view of the disposable diaper concerning a 1st embodiment. It is sectional drawing in the X1-X'1 line | wire of FIG. It is an enlarged view of A part shown in FIG. It is an enlarged view of the B part shown in FIG. It is an enlarged view of the pressing part of the absorber which concerns on the modification 1 on the basis of A part shown in FIG.

  Hereinafter, a disposable diaper as an absorbent article according to an embodiment will be described with reference to the drawings. In this embodiment, the absorbent article 1 is an open type diaper. In this embodiment, an open type diaper is not a diaper that has been molded into a pants shape in advance, but is in a state where it is unfolded in a state before use, and is used by fastening predetermined parts of the product with tape or the like. A diaper worn by a person. Note that the diaper may be a pant-type diaper that has been formed into a pant shape in advance, an adult diaper, or a children's diaper.

  In the following description of the drawings, the same or similar parts are denoted by the same or similar reference numerals. However, it should be noted that the drawings are schematic and ratios of dimensions and the like are different from actual ones. Accordingly, specific dimensions and the like should be determined in consideration of the following description. Moreover, it is a matter of course that portions having different dimensional relationships and ratios are included between the drawings.

(1) Overall Configuration of Absorbent Article FIG. 1 is a plan view of the absorbent article 1, and FIG. 2 is a cross-sectional view of the X1-X1 ′ cross section shown in FIG. The absorbent article 1 corresponds to the front waistline region S1 disposed on the wearer's belly side, the rear waistline region S2 disposed on the wearer's back side, and the inseam of the wearer, and the front waistline region S1 and the rear And a crotch region S3 located between the waist region S2.

  The absorbent article 1 includes a liquid permeable top sheet 10, a side sheet 60, a second sheet 15, a liquid impermeable exterior sheet 20, and an absorber 30. The absorbent article 1 includes a front-rear direction L extending to the wearer's body front side and a rear body side, a width direction W orthogonal to the front-rear direction, an inner direction T1 toward the wearer, and a side opposite to the inner direction (wearer And an outward direction T2 toward the side away from the head. The inner direction T1 is a skin contact side such as a surface sheet, and the outer direction is a non-skin contact side.

  The top sheet 10 is provided on the skin contact side in contact with the wearer's skin. The top sheet 10 is formed of a liquid-permeable sheet such as a hydrophilic nonwoven fabric or woven fabric, an apertured plastic film, or an apertured hydrophobic nonwoven fabric.

  A second sheet 15 is joined to the non-skin contact side (outward direction side) of the top sheet 10. The second sheet 15 is disposed between the top sheet 10 and the absorber 30. By providing the second sheet 15, the absorption speed of the body fluid can be increased and the return of the body fluid after absorption can be suppressed. As the second sheet 15, for example, an air-through nonwoven fabric or a perforated film is used. Note that the absorbent article may not include the second sheet 15.

  The second sheet 15 is configured to have a shorter dimension in the width direction and a dimension in the front-rear direction than the absorber 30. The second sheet 15 is disposed so as to cover a part of the absorber 30.

  The side sheets 60 are disposed so as to cover both outer ends in the width direction of the top sheet 10 in the inner direction T <b> 1 than the top sheet 10. For the side sheet 60, a liquid-impermeable sheet or the like is used. The side sheet 60 is bonded to the surface of the top sheet 10 on the skin contact side via an adhesive.

  Side sheets overlap each other at the inner end in the width direction of the side sheet 60. A leak-proof elastic material 61 is provided in a portion extending along the front-rear direction L at a portion where the side sheets overlap. The side sheet 60 and the leak-proof elastic material 61 constitute a leak-proof wall that prevents lateral leakage of excrement. The leak-proof walls are provided along the front-rear direction of the absorbent article 1 at both ends in the width direction of the absorbent body 30.

  The exterior sheet 20 includes a back nonwoven fabric 21 that comes into contact with clothes, and a liquid-impermeable back film 22 that is located on the skin side of the back nonwoven fabric 21 and formed of a waterproof film (for example, polyethylene). The back film 22 is made of a moisture permeable or non-moisture permeable film.

  The absorber 30 is provided between the exterior sheet 20 and the top sheet 10 and the second sheet 15. The absorber 30 absorbs the body fluid of the wearer. The absorber 30 is formed by an absorbent core made of an absorbent material such as pulverized pulp or a superabsorbent polymer, and an absorbent sheet such as a tissue covering the absorbent core. The configuration of the absorber will be described in detail later.

  The side sheet 60 and the exterior sheet 20 are joined to each other on the outer side in the width direction than the top sheet 10. The outer end portions in the width direction of the side sheets 60 and the exterior sheet 20 are recessed inward in the width direction in the crotch region S3. A region around the dent of the crotch region S3 is a leg region that is arranged along the wearer's leg. In the leg periphery region, a leg periphery elastic member 25 that expands and contracts in the front-rear direction is disposed.

  The leg-hole elastic members 25 are arranged along the front-rear direction L, and three leg elastic members 25 are arranged at intervals in the width direction. The leg-hole elastic member 25 is disposed between the side sheet 60 and the back film 22 in a state of being stretched in the front-rear direction L.

  In the rear waistline region S <b> 2, a fastening member 41 that extends outward in the width direction from the side sheet 60 and the exterior sheet 20 is provided. The fastening member 41 is joined between the exterior sheet 20 and the side sheet 60. The fastening member 41 extends outward in the width direction from the top sheet 10. The fastening member 41 includes a hook portion 41A that engages with a target portion (not shown), which will be described later, and a fixed piece 41B to which the hook portion 41A is attached.

(2) Configuration of Absorber Next, the configuration of the absorber will be described in detail. The absorbent body is configured to include an absorbent core containing pulp and a superabsorbent polymer, and a tissue that wraps the absorbent core. The tissue includes an upper layer tissue disposed on the skin surface side of the absorbent core and a lower layer tissue disposed on the non-skin surface side. In the drawings, tissue is omitted for convenience.

Absorbent core of the present embodiment, the pulp basis weight 254.4g / ^{m 2,} and is configured to include a superabsorbent polymer having a basis weight of 228.3g / ^{m 2,} a. The ratio of superabsorbent polymer to absorbent material throughout the absorbent core is 47%. The ratio of the superabsorbent polymer to the absorbent material of the entire absorbent core is desirably 35 to 55%. The area of the absorber is 460 cm ² . Further, the basis weight of the upper layer tissue is 18 g / m ² , and the basis weight of the lower layer tissue is 16 g / m ² .

  When the absorbent body 30 is divided into a skin side region 30A, a central region 30B, and a non-skin side region 30C in the thickness direction, the central region 30B has a higher absorbency polymer than the skin side region 30A and the non-skin side region 30C. It is comprised so that the density of may become high. FIG. 3 is an enlarged view of a portion A shown in FIG. In FIG. 3, a rough section of the skin side area 30A, the center area 30B, and the non-skin side area 30C is illustrated.

  Note that the skin side region 30A is a constant region including the skin contact side surface of the absorbent body 30 and extending from the skin contact side surface toward the non-skin contact surface side. The non-skin side area 30 </ b> C is a constant area including the non-skin contact side surface of the absorber and from the non-skin contact side surface toward the skin contact surface side. The central area 30B is an area between the skin side area and the non-skin side area.

  The skin side area, the center area, and the non-skin side area are laminated in the thickness direction T in this order. For example, the thickness of the skin side region is 10% to 40% of the thickness of the absorber, the thickness of the central region is 20% to 80% of the thickness of the absorber, and the thickness of the non-skin side region is the thickness of the absorber. 10% to 40%.

  As the absorber having the thinnest central region, the skin side region has a thickness of 40%, the central region has a thickness of 10%, and the non-skin side region has a thickness of 40%. Moreover, as a thin absorber with the thickest thickness of the central region, the thickness of the skin side region is 10%, the thickness of the central region is 80%, and the thickness of the non-skin side region is 10%. The thicknesses of the skin side area, the central area, and the non-skin side area of the absorber can be appropriately set within the range of these absorbers.

  You may comprise so that the thickness of a non-skin side area may become thicker than the thickness of a skin side area. The superabsorbent polymer has a grain shape, and moves between the pulps when transporting or wearing the disposable diaper, and may move to the back sheet side of the absorbent body. When the superabsorbent polymer moves to the backsheet side of the absorbent body, the outer surface of the disposable diaper (the surface on which the back nonwoven fabric 21 is disposed) is roughened by the superabsorbent polymer, and the wearer (for example, replace the disposable diaper) A hard superabsorbent polymer may hit. However, by making the thickness of the non-skin side region thicker than the thickness of the skin side region, it is possible to suppress roughness due to the superabsorbent polymer on the outer surface of the disposable diaper.

  Moreover, you may comprise so that the thickness of a skin side area may become thicker than the thickness of a non-skin side area. The wearer often touches the outer surface of the disposable diaper, but the wearer often touches the inner surface of the disposable diaper (surface on the surface sheet side). By making the thickness of the skin side area thicker than the thickness of the non-skin side area, it is possible to suppress roughness due to the superabsorbent polymer on the inner surface of the disposable diaper, and to improve the wearing feeling.

  The thickness of the absorber 30 is desirably 5.0 mm or less. By increasing the thickness of the absorber 30, the cushioning property of the absorber 30 can be enhanced. However, if the thickness of the absorbent body 30 is made too thick, it may be difficult to maintain the shape of the entire absorbent body in the thickness direction by the compressed portion described later. Therefore, the thickness of the absorber is desirably 5.0 mm or less. In addition, the thickness of the absorber of this Embodiment is 3.0 mm, and the depth of the pressing part mentioned later is 1.2 mm.

  In addition, the thickness of an absorber here is the state which extended elastic members, such as the leg elastic material 25, until the state in which wrinkles, such as a surface sheet and a side sheet 60 which comprise a disposable diaper, are not formed (shown in FIG. 1). State).

  The thickness of each of the skin side area, the center area, and the non-skin side area is, for example, impregnated with liquid nitrogen, frozen, cut with a razor, returned to room temperature, and then scanned with an electron microscope (for example, Keyence). It can be measured by measuring at a magnification of 50 times using VE7800).

  The skin side area, the central area, and the non-skin side area may be configured to be separable by separate layers, or may be integrated. For example, in the manufacturing process, the skin side area, the central area, and the non-skin side area are manufactured in separate steps, and the skin side area, the central area, and the non-skin side area are integrated in the manufactured state. Good.

  In addition, the density of the superabsorbent polymer in the central region only needs to be configured so that the density of the superabsorbent polymer is higher than that in the skin side region and the non-skin side region. The polymer may be disposed, or the superabsorbent polymer may not be disposed.

  The configuration in which the superabsorbent polymer is not disposed in the skin side region and the non-skin side region is a configuration in which the superabsorbent polymer is not disposed in the skin side region and the non-skin side region in the production process. After the process (for example, the superabsorbent polymer is arranged in the skin side area and the non-skin side area by moving a part of the superabsorbent polymer in the central area to the skin side area and the non-skin side area in the product transportation process etc.) It is a concept that also includes other configurations.

When the central region of the absorbent body is composed of pulp and a superabsorbent polymer, for example, the density of the superabsorbent polymer in the central region can be 0.14 g / cm ³ . When the central region of the absorbent body is constituted by a sheet material sandwiching the superabsorbent polymer and the superabsorbent polymer, for example, the ratio of the superabsorbent polymer in the central region can be 80% or more.

  The density of each superabsorbent polymer in the skin side region, the central region, and the non-skin side region can be measured, for example, by the following method.

  If the skin side area, central area, and non-skin side area can be separated in a state where the absorbent body is dry, the absorbent body with a known area is separated from the skin side area, central area, and non-skin side area, and the skin side Measure the thickness of each area, center area and non-skin area. The thickness of each skin side area, center area, and non-skin side area can be measured using an electron microscope (for example, KEYENCE VE7800). Next, the skin side area, the central area, and the non-skin side area are each enclosed in a bag, and each bag is shaken at least several tens of times to separate the superabsorbent polymer from the skin side area, the central area, and the non-skin side area. Next, the skin side area, the center area, and the non-skin side area are taken out, and the superabsorbent polymer that could not be separated is taken out with tweezers. The superabsorbent polymer in the bag and the superabsorbent polymer taken out by tweezers are combined and the weight is measured. Then, the density of the superabsorbent polymer in the skin side area, the central area, and the non-skin side area can be calculated.

  On the other hand, if the skin side area, the central area, and the non-skin side area cannot be separated in a state where the absorbent body is dried, the weight of the absorbent body having a known area is measured. Next, the absorber is immersed for 5 minutes in a sufficient amount of ion-exchanged water colored with a water-soluble dye. After dipping, the skin side area of the absorbent body is removed from the absorbent body with the tweezers using the interface of the swollen superabsorbent polymer as the release surface. Using the taken-out part as the skin side area, it is dried for 1 hour or more with an electric dryer at 80 ° C. The dyed superabsorbent polymer adhering to the skin side area after drying is separated from the skin side area with tweezers, etc., collected and weighed, and the weight is determined as the weight of the water absorbent polymer in the skin side area. To do. Similarly, the weight of the superabsorbent polymer in the non-skin side area is measured.

  The thickness of each skin side area, central area, and non-skin side area is measured in advance using an electron microscope (for example, KEYENCE VE7800). At this time, the interface of the skin side area, the center area, and the non-skin side area becomes the boundary between the part with a large amount of the superabsorbent polymer and the part with a small amount of the super absorbent polymer (the boundary that peels when peeled off with tweezers). The boundary surface between the area and the central area should be in the range of 10-40% from the whole skin side and non-skin side.

  The central area of the absorbent body is configured with a higher density of superabsorbent polymer than the skin side area and the non-skin side area, and the density of the superabsorbent polymer in the skin side area and the non-skin side area is higher than the central area. Is also low. The skin side area and the non-skin side area of the absorbent body are portions that easily come into contact with the wearer's skin. If the basis weight of the superabsorbent polymer in the portion is high, the wearing feeling is likely to deteriorate. However, since the basis weight of the superabsorbent polymer in the skin side region and the non-skin side region that are easily in contact with the skin of the wearer is low, deterioration of wearing feeling such as roughness due to the superabsorbent polymer can be suppressed.

  In order to reduce the thickness of the absorber, it is conceivable to increase the ratio of the superabsorbent polymer to the entire absorbent material constituting the absorber in order to ensure the absorption performance. However, if the ratio of the superabsorbent polymer to the entire absorbent material constituting the absorbent body is increased, the surface of the absorbent body may become rough due to the superabsorbent polymer, and the touch may be deteriorated. However, by reducing the basis weight of the superabsorbent polymer in the skin side area and the non-skin side area, even when the absorber is thinned, while ensuring the absorption performance by the superabsorbent polymer in the central area, Deterioration of wearing feeling due to roughness of the superabsorbent polymer on the absorber surface can be suppressed.

  Moreover, for example, when the basis weight of the superabsorbent polymer in the skin side region is increased, the superabsorbent polymer in the skin side region absorbs the body fluid, thereby causing gel blocking, which may deteriorate the absorption performance of the entire absorbent body. . However, it is possible to suppress gel blocking by increasing the basis weight of the superabsorbent polymer in the central region.

  The absorber 30 is formed with a plurality of compressed portions obtained by compressing the absorber in the thickness direction. The pressing part is formed on the skin contact surface side of the absorbent body, and is formed on the front surface side recessed part 31 recessed from the top sheet side toward the back sheet side, and on the back sheet side of the absorber, and from the back sheet side to the surface And a back surface side recess 32 that is recessed toward the sheet side. The pressing part is formed by compressing the absorber in the thickness direction T by embossing.

  The front surface side recess 31 is compressed from the inner direction T1 toward the outer direction T2, and is recessed from the inner direction toward the outer direction. The surface of the absorbent article on the skin contact side is formed with a recess disposed along the surface-side recess 31 of the absorbent body 30. The recess is formed by arranging the top sheet 10 and the second sheet 15 along the top surface side recess 31 of the absorber 30.

  Moreover, the back surface side recessed part 32 is compressed toward the inner direction T1 from the outer direction T2, and is dented toward the inner direction from the outer direction. On the surface on the non-skin contact side of the absorbent article, a recess disposed along the back surface side recess 32 of the absorbent body 30 is formed. The recess is formed by arranging the back nonwoven fabric 21 and the back film 22 along the back surface side recess 32 of the absorber 30.

  Subsequently, the shape of the pressing part formed in the absorber is demonstrated. FIG. 4 is an enlarged view of a portion B shown in FIG. In plan view, the shape of the front surface side recess 31 and the shape of the back surface side recess 32 of the present embodiment are the same, and therefore, in the following description, the shape of the front surface side recess 31 will be described as an example.

  In addition, the shape of the surface side recessed part 31 and the shape of the back surface side recessed part 32 are not restricted to the same structure, The shape of the surface side recessed part 31 and the shape of the back surface side recessed part 32 may differ. Furthermore, the pressing part should just have at least any one among the surface side recessed part 31 and the back surface side recessed part 32. FIG.

  The surface side recessed part 31 cross | intersects the 1st pressing part 33 extended in the 1st inclination direction C1 which cross | intersects the longitudinal direction and width direction of an absorbent article, the 1st inclination direction C1, and cross | intersects a longitudinal direction and the width direction. And a second pressing part 34 extending in the second inclined direction C2.

  The 1st pressing part 33 and the 2nd pressing part 34 are alternately formed along the longitudinal direction L as a 1st direction which is one of a longitudinal direction and the width direction, and are as a 2nd direction orthogonal to a 1st direction. Are formed alternately at intervals along the width direction W. Therefore, a plurality of wavy linear pressing portions 35 that are continuous in the longitudinal direction are formed in the absorber. The linear pressing part 35 is comprised by the 1st pressing part 33 and the 2nd pressing part 34 which continue in a line along a longitudinal direction.

  In the region between the first pressing portion 33 and the second pressing portion 34 adjacent in the longitudinal direction and the region between the first pressing portion 33 and the second pressing portion 34 adjacent in the width direction, the pressing portion is formed. A non-squeezed region R1 is provided.

  The length L33 in the longitudinal direction of the first pressing part 33 is longer than the length W33 in the width direction of the first pressing part 33, and the length L34 in the longitudinal direction of the second pressing part 33 is the width direction of the second pressing part. Longer than W34. Therefore, the shape of the non-squeezing region R1 has a longer dimension in the longitudinal direction than a dimension in the width direction. Moreover, the shape in planar view of the non-pressing area | region R1 is a rhombus shape.

  As for width T33 of the 1st pressing part, and width T34 of the 2nd pressing part, it is desirable that it is 1 mm or more. When the width T34 of the first pressing part and the width T34 of the second pressing part are 1 mm or more, the absorbent body 30 can be pressed in the thickness direction by the first pressing part 33 and the second pressing part 34. Moreover, when T33 of the 1st pressing part 33 and the width | variety T34 of a 2nd pressing part become long too much, the 1st pressing part 33 and the 2nd pressing part 34 may become hard too much. Therefore, as for the width W31 of a 1st pressing part and the width W32 of a 2nd pressing part, it is desirable that it is 3.0 mm or less.

  Since the compressed part is formed in the absorbent body, the compressed part can suppress the movement of the superabsorbent polymer in the absorbent body, and can suppress deterioration in wearing feeling and absorbent performance due to the superabsorbent polymer being biased. .

  Furthermore, the 1st pressing part 33 is along the 1st inclination direction, the 2nd pressing part 34 is along the 2nd inclination direction C2, and the 1st pressing part 33 and the 2nd pressing part are arrange | positioned alternately. Therefore, the non-compression area | region R1 which surrounded the four sides by the 1st pressing part and the 2nd pressing part can be provided. Since a plurality of non-squeezed regions R1 are formed, the range in which the superabsorbent polymer moves can be appropriately partitioned, and the bias of the superabsorbent polymer can be suppressed.

  In the configuration in which the first pressing portion 33 and the second pressing portion 34 are continuous in the longitudinal direction and the width direction, and no gap is provided between the first pressing portion 33 and the second pressing portion 34, the first A portion where the compressed portion 33 and the second compressed portion 34 intersect in the longitudinal direction and the width direction is formed. Since the absorber is compressed in the thickness direction, the portion where the first pressing portion and the second pressing portion intersect is harder than the surroundings. If the superabsorbent polymer is disposed at a portion where the first pressing portion and the second pressing portion intersect, it may become harder and the wearer may feel uncomfortable.

  However, the 1st pressing part and the 2nd pressing part are alternately arrange | positioned at intervals in the width direction. Therefore, when forming a pressing part, the space where a superabsorbent polymer escapes can be provided, the local hardening of the absorber by concentration of a superabsorbent polymer can be suppressed, and the deterioration of a feeling of wearing can be suppressed.

Moreover, the non-squeezing area | region is provided in the absorber. For example, when the entire surface of the absorbent body is compressed in the thickness direction, fibers such as pulp constituting the absorbent body are compressed, so that the cushioning property of the absorbent body is lowered. However, since a plurality of non-squeezing regions R1 are formed between the compressed portions of the absorber, cushioning properties can be ensured. Incidentally, while ensuring a cushion property, in order to obtain the effect of pressing the absorbing material by compressing portion, the area of the compression unit, 200～600Mm ² is preferred.

  The front surface side recess 31 is compressed in the thickness direction from the skin contact side of the absorbent body toward the non-skin contact side. Since the surface side recessed part 31 is compressed in the thickness direction from the skin contact side of the absorbent body toward the non-skin contact side, the fiber density in the region on the skin contact surface side of the absorbent body is increased. Therefore, the cushioning property on the skin contact surface side of the absorbent body that touches the skin of the wearer is enhanced, and the touch is improved. Moreover, the fiber density of the area | region of the skin contact surface side of an absorber becomes high, the tangle between fibers is strengthened and the diffusibility of a bodily fluid increases. Furthermore, by strengthening the entanglement between the fibers, the movement of the superabsorbent polymer toward the skin contact surface can be suppressed.

  Furthermore, the back surface side recessed part 32 is compressed by the thickness direction toward the skin contact side from the non-skin contact side of an absorber. Since the back surface side recessed part 32 is compressed in the thickness direction from the non-skin contact side of the absorbent body toward the skin contact side, the fiber density of the region on the non-skin contact surface side of the absorbent body is increased. Therefore, the cushioning property on the non-skin contact surface side of the absorbent body that is easily touched by the wearer is enhanced, and the touch is improved. Moreover, the fiber density of the area | region of the skin contact surface side of an absorber becomes high, the tangle between fibers is strengthened and the diffusibility of a bodily fluid increases. Furthermore, by strengthening the entanglement between the fibers, the movement of the superabsorbent polymer toward the non-skin contact surface can be suppressed. Moreover, by forming the front surface side recessed part 31 and the back surface side recessed part 32, the fiber of the skin surface side and the non-skin surface side fiber of an absorber can be firmly entangled.

  Further, the cushioning properties of the absorbent body on the skin contact surface side and the non-skin contact surface side are enhanced, so that it is possible to suppress a sense of discomfort even when the thickness is reduced.

  An interval T35 in the width direction between the first pressing portion and the second pressing portion is not less than 0.35 mm and not more than 8.5 mm. 0.35 mm is the average particle diameter of the superabsorbent polymer. When the space | interval of the width direction with a 1st pressing part and a 2nd pressing part is smaller than the particle size of a superabsorbent polymer, between a 1st pressing part and a 2nd pressing part adjacent to the width direction is a superabsorbent polymer. Does not pass, and a portion in which the superabsorbent polymer is solidified occurs between the first pressing portion and the second pressing portion. Since the superabsorbent polymer has higher rigidity than the pulp, when a portion where the superabsorbent polymer is hardened is formed, the portion becomes locally hard and the wearing feeling may be deteriorated. However, the space | interval of the width direction of a 1st pressing part and a 2nd pressing part is 0.35 mm or more, Therefore A super absorbent polymer exists between the 1st pressing part and 2nd pressing part which adjoin a width direction. A passing space can be formed.

  For example, when the 1st pressing part and the 2nd pressing part are continuing in the width direction, a pressing part is arrange | positioned at a grid | lattice form. A large number of spaces surrounded on all sides by a pair of first pressing parts and a pair of second pressing parts are formed in the absorber. In the region surrounded by such a compressed portion, there is no space through which the superabsorbent polymer passes, and the superabsorbent polymer is concentrated, and there is a possibility that a portion having locally high rigidity is formed. However, local hardening can be suppressed by forming the space which a superabsorbent polymer passes between the 1st pressing part and 2nd pressing part which adjoin the width direction.

  Moreover, the space | interval T36 of the width direction of the 1st pressing part 33 and the 2nd pressing part 34 is 8.5 mm or less, More preferably, the space | interval T36 is 4.25 mm or less. Specifically, it is a half of the distance W36 between the width direction outer end and the second width direction outer end of the first compressed portion adjacent in the width direction, and more preferably 1/4 of the distance W36. Is desirable.

  The squeezing part is formed on substantially the entire absorbent body, and the bending rigidity of the absorbent body is increased by forming the squeezing part. Therefore, even when an external force is applied to the absorber, such as when the absorber is pressed from the outer side in the width direction to the inner side in the width direction, it becomes difficult to bend. However, when the space | interval of the width direction of a 1st pressing part and a 2nd pressing part is longer than 8.5 mm, the area | region in which the pressing part is not formed becomes long, and the effect which prevents the absorber of the pressing part from shaking. Is reduced. Therefore, as for the space | interval of the width direction of a 1st pressing part and a 2nd pressing part from a viewpoint of preventing the absorber from shaking, 8.5 mm or less is preferable. Furthermore, if the distance in the width direction between the first pressing part and the second pressing part is 4.25 mm or less, the sway of the absorber can be effectively suppressed.

  Since the pressing part is formed over the entire surface of the absorbent body, it suppresses the movement of the superabsorbent polymer over the entire surface of the absorbent body, and the wearing feeling due to the uneven arrangement of the absorbent polymer material Deterioration of absorption performance can be suppressed. Furthermore, since the pressing part is formed in the whole surface of an absorber, a bodily fluid can be spread | diffused throughout the absorber and a gel blocking can be suppressed. Furthermore, the absorption capacity of the absorber can be used effectively.

  Moreover, when it is going to make an absorber thin, in order to ensure absorption performance, it is possible to raise the ratio of the superabsorbent polymer with respect to the whole absorption material which comprises an absorber. However, when the ratio of the superabsorbent polymer to the entire absorbent material constituting the absorbent body is increased, the pulp ratio is low, so that the binding force between the pulps is low, and the absorbent body is easily swayed. However, even if it is a case where an absorber is thinned by forming a pressing part in the absorber whole area, a twist can be suppressed.

  As for the absorber of this Embodiment, although the pressing part is formed in the whole surface, the pressing part does not need to be formed in the whole surface. For example, you may form a pressing part only in the absorber arrange | positioned in crotch area | region S2 including the excretion opening | mouth contact | abutting area | region contact | abutted to a wearer's excretion opening | mouth. By forming the squeezing part partially rather than the entire surface of the absorbent body, the rigidity of the entire absorbent body can be reduced and the flexibility can be increased.

  The linear pressing part 35 where the 1st pressing part 33 and the 2nd pressing part 34 continued is arrange | positioned along the longitudinal direction. Generally, the absorber 30 has a longer length in the longitudinal direction than the length in the width direction, and there is a possibility that the absorber 30 cannot be efficiently used up to both ends in the longitudinal direction of the absorber. However, by providing the 1st pressing part 33 and the 2nd pressing part continuously in the longitudinal direction of an absorber, a bodily fluid can be spread | diffused in a longitudinal direction and an absorber whole area | region can be used efficiently.

  Moreover, the 1st pressing part 33 and the 2nd pressing part 34 are rhombus shape whose dimension of a longitudinal direction is longer than the dimension of the width direction. When force is applied from the outer side in the width direction toward the inner side in the width direction of the absorber, the force is configured to propagate along the longitudinal direction. Specifically, when the dimension in the width direction of the first squeezing part 33 and the second squeezing part 34 is longer than the dimension in the longitudinal direction, the force for suppressing deformation by the squeezing part is greater in the width direction than in the longitudinal direction. It becomes stronger, and the absorber may not be easily deformed inward in the width direction. However, when the force which suppresses the deformation | transformation by a pressing part becomes weak in the width direction rather than a longitudinal direction, for example, when it was pinched | interposed by the wearer's leg, an absorber can be deform | transformed flexibly.

(3) Modified Example Next, in the following description of the modified example, only portions different from the above-described embodiment will be described, and the description of other configurations will be omitted using the same reference numerals. FIG. 5 is an enlarged view of the squeezing portion of the absorbent body according to Modification 1 with reference to the portion A shown in FIG. 1.

  Although the 1st pressing part 33 and the 2nd pressing part 34 of embodiment are linear which has a fixed width and length, the 1st pressing part 33 and the 2nd pressing part 34 of the absorber which concern on the modification 1 are shown. Is constituted by a plurality of linear pressing parts arranged intermittently. Crevices 33C and 34C are formed between the plurality of linear compressed parts. In the place where the 1st pressing part and the 2nd pressing part which adjoined in the width direction approach most, a superabsorbent polymer tends to concentrate on the said part at the time of embossing. However, since the first squeezing part and the second squeezing part are constituted by a plurality of squeezing parts arranged intermittently, the superabsorbent polymer can escape through the gaps between the squeezing parts, and the high absorption The concentration of the functional polymer can be suppressed.

  In addition, although the 1st pressing part and the 2nd pressing part of the modification 1 are comprised by the some linear pressing part arrange | positioned intermittently, the shape of a pressing part is dot shape, a heart shape, etc. It may be a symbol and is not limited. In addition, the dimension of the clearance gaps 33C and 34C is the same as the space | interval T35 of the width direction of the 1st pressing part and the 2nd pressing part shown in FIG. 4, or the space | interval T35 of the width direction of a 1st pressing part and a 2nd pressing part. It is structured short.

(4) Other Embodiments As described above, the contents of the present invention have been disclosed through the embodiments of the present invention. However, it is understood that the descriptions and drawings constituting a part of this disclosure limit the present invention. Should not. From this disclosure, various alternative embodiments, examples and operational techniques will be apparent to those skilled in the art.

  The skin side area, the center area, and the non-skin side area of the absorbent body are all configured to contain pulp and a superabsorbent polymer, but at least one of the skin side area and the non-skin side area is pulp. It may be constituted only by. Moreover, at least any one of the skin side area and the non-skin side area may contain crimped fibers such as curly cellulose fibers, or may be constituted by a bulky nonwoven fabric. Examples of the bulky nonwoven fabric include an airlaid nonwoven fabric and an air-through nonwoven fabric.

  Furthermore, the areas of the skin side area, the central area, and the non-skin side area of the absorber may not be the same, for example, the area of the skin side area is smaller than the areas of the central area and the non-skin side area. The skin side area may be configured to cover a part of the central area.

  Moreover, the dimension of the width direction may be longer than the dimension of a longitudinal direction, and the 1st pressing part and the 2nd pressing part may be comprised. Moreover, the 1st pressing part and the 2nd pressing part may be alternately formed in the longitudinal direction at intervals, and may be formed alternately in the width direction.

DESCRIPTION OF SYMBOLS 10 ... Surface sheet 15 ... Second sheet 20 ... Exterior sheet 21 ... Back nonwoven fabric 22 ... Back film 25 ... Leg elastic material 30 ... Absorber 30A ... Skin side Area 30B ... Central area 30C ... Non-skin side area 31 ... Front side recess 32 ... Back side recess 33 ... First pressing part 34 ... Second pressing part 41 ... Stop Adhering member 60 ... side sheet

Claims (8)

A liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorbent body provided between the top sheet and the back sheet and containing fibers and a superabsorbent polymer,
The absorbent body is an absorbent article in which a plurality of compressed parts obtained by compressing the absorbent body in the thickness direction are formed,
When the absorbent body is divided into a skin side area, a central area, and a non-skin side area in the thickness direction, the central area is more dense than the skin side area and the non-skin side area. Is high,
The squeezed portion includes a front-side concave portion that is recessed from the skin contact side of the absorber toward the non-skin contact side, and a back surface side that is recessed from the non-skin contact side of the absorber toward the skin contact side. A recess,
Each of the front surface side concave portion and the rear surface side concave portion intersects the first inclined direction extending in the first inclined direction intersecting the longitudinal direction and the width direction of the absorbent article, the first inclined direction, and the longitudinal direction. A second pressing portion extending in a second inclined direction intersecting the direction and the width direction,
The first pressing portion and the second pressing portion are alternately formed along a first direction that is one of the longitudinal direction and the width direction, and along a second direction orthogonal to the first direction. It is formed alternately at intervals,
In a region between the first pressing unit and the second pressing unit adjacent in the first direction, and a region between the first pressing unit and the second pressing unit adjacent in the second direction, A non-squeezed area where the compressed part is not formed is provided,
The length of the first pressing part in the first direction is longer than the length of the first pressing part in the second direction,
Wherein the length in the first direction of the second compressing part is rather long than the length of the second direction of the second compressing part,
The said center area is an absorbent article which has the said fiber and the said super absorbent polymer . The absorbent body has an absorbent core containing the fibers and the superabsorbent polymer, and a core wrap,
The absorbent article according to claim 1, wherein the ratio of the superabsorbent polymer to the absorbent material of the entire absorbent core is 35 to 55%.   The absorbent article according to claim 1 or 2, wherein each of the skin side area and the non-skin side area has the fiber and the superabsorbent polymer.   The absorbent article according to any one of claims 1 to 3, wherein the skin side area, the central area, and the non-skin side area are integrated. Wherein the second direction between the first compressing part and the second compressing portion is 0.35mm or more 8.5mm or less, the absorbent article according to any one of claims 1 to 4. The said pressing part is an absorbent article in any one of Claims 1-5 currently formed over the whole surface of the said absorber. The first direction is the longitudinal direction,
The absorbent article according to any one of claims 1 to 6 , wherein the second direction is the width direction. Wherein each of the first compression unit and the respective second compressing portion is constituted by a plurality of compression portions which are intermittently arranged, the absorbent article according to any one of claims 1 to 7.

Images