JP2008246093A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve adhesion with the crotch without fomenting the bend of a main body part of an absorbent article. <P>SOLUTION: The absorbent article comprises: a main body part of the absorbent article; an absorbent 20 provided with a liquid absorbing member for absorbing liquid, bonded to one end part in the longitudinal direction of the main body part at least at one end part by a bonding part 10g and provided with a part not bonded to the main body part on the other end part side; and a leakage preventing wall 46 energized so as to be erected from the main body part and provided along the longitudinal direction while being positioned at both end parts in the width direction crossing the longitudinal direction. The leakage preventing wall 46 is piled up on the main body part and fixed at a fixing part 47a on one end part side in the longitudinal direction, and the end 10r on the other end part side in the bonding part 10g is positioned on the other end part side. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an absorbent article.

A so-called sanitary napkin is an example of an absorbent article that absorbs liquid excreted from the human body such as menstrual blood. Recently, the number of sanitary napkins has increased, and as one of them, a main body part arranged in underwear and a part of the main body part are overlapped in a separable manner from the main body part while aligning the longitudinal direction with each other. And an absorbent body. For example, in the absorbent article described in Patent Document 1, only the front end portion of the absorbent body is joined to the main body portion by the joint portion, while other parts such as the rear end portion are attached to the main body portion. Thus, the absorber is movable back and forth with the front end as a fulcrum.
JP 2002-159534 A

  In using such an absorbent article, first, the main body portion is arranged on the inner surface of the undergarment (that is, the surface on the human body side) while aligning the longitudinal direction of the absorbent body with the front-rear direction of the human body. In the state where the underwear is put on, the rear end of the absorber is pulled up so that the absorber enters the groove such as the buttock, and the absorber is thereby sandwiched and fixed in the groove such as the buttock.

  However, during the above-described pulling operation, the pulling force of the pulling operation concentrates on the rear end or the like of the joint, and the main body may be broken at the rear end or the like by the pulling force. In that case, the adhesiveness between the absorbent article and the crotch deteriorates, which is not preferable.

  On the other hand, a pair of leak-proof walls (so-called three-dimensional gathers) may be attached to the main body in order to prevent liquid leakage in the width direction intersecting the longitudinal direction. In that case, these leak-proof walls are provided along the longitudinal direction while being positioned at both ends in the width direction of the main body. And the said leak-proof wall is urged | biased from the said main-body part by elastic members, such as rubber | gum provided along the said longitudinal direction.

  However, for the purpose of adjusting the standing state of the leak-proof wall, the longitudinal end portion of the leak-proof wall is overlapped with the main body portion and fixed by a fixing portion, that is, the leak-proof wall. The front end portion of the leak wall is turned down so as not to stand up from the main body portion.

  For this reason, a tensile force acts on the main body portion via the fixing portion from the front end portion of the leak-proof wall to be erected, that is, in the fixing portion, the same kind as the above-described pulling force during the pulling operation. The pulling force will be applied.

  Therefore, if the position of the fixing portion is located in the vicinity of the rear end where the pulling force at the time of the pulling operation is concentrated, the pulling force applied from the leak-proof wall to the fixing portion is at the time of the pulling operation. In addition to the pulling force, the folding at the rear end or the like during the lifting operation may be promoted.

  The present invention has been made in view of the above-described conventional problems, and is capable of improving the adhesion between the crotch without promoting the folding of the main body of the absorbent article. The purpose is to provide goods.

The main invention for achieving the above object is:
A main body of the absorbent article;
An absorbent body that has a liquid absorbing member that absorbs liquid and is overlapped with each other in the longitudinal direction on the main body portion, and at least one end portion of the main body portion in the longitudinal direction by a joint portion. Is bonded to the other end portion side of the one end portion, and an absorber having a portion that is not bonded to the main body portion, and
A leak-proof wall urged so as to stand up from a surface on which the absorber in the main body is superimposed, and is positioned at both ends in the width direction intersecting the longitudinal direction, along the longitudinal direction. Provided with a leakage barrier,
The leak-proof wall is overlapped with the main body portion and fixed at the fixing portion on the one end portion side in the longitudinal direction,
The absorbent article is characterized in that an end of the joint portion on the other end side is located closer to the other end portion in the longitudinal direction than the fixed portion.
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  ADVANTAGE OF THE INVENTION According to this invention, the absorbent article which can make favorable adhesiveness with a crotch can be provided, without encouraging the bending of the main-body part of an absorbent article.

  At least the following matters will become clear from the description of the present specification and the accompanying drawings.

A main body of the absorbent article;
An absorbent body that has a liquid absorbing member that absorbs liquid and is overlapped with each other in the longitudinal direction on the main body portion, and at least one end portion of the main body portion in the longitudinal direction by a joint portion. Is bonded to the other end portion side of the one end portion, and an absorber having a portion that is not bonded to the main body portion, and
A leak-proof wall urged so as to stand up from a surface on which the absorber in the main body is superimposed, and is positioned at both ends in the width direction intersecting the longitudinal direction, along the longitudinal direction. Provided with a leakage barrier,
The leak-proof wall is overlapped with the main body portion and fixed at the fixing portion on the one end portion side in the longitudinal direction,
The absorbent article according to claim 1, wherein an end of the joint portion on the other end portion side is located closer to the other end portion side in the longitudinal direction than the fixing portion.
According to such an absorbent article, the said fixing | fixed part is located in the one end part side rather than the end of the said other end part side in the said junction part regarding the said longitudinal direction. Therefore, the tensile force applied to the fixed portion in an attempt to stand up the leak-proof wall acts on the one end portion side rather than the end on the other end portion side in the joint portion. The absorber is joined at the joint, and the bending rigidity of the main body at the portion is increased.
Therefore, the tensile force applied from the leak-proof wall to the fixed portion is added to the tensile force acting on the end on the other end side and the vicinity thereof during the above-described pulling operation, and Encouraging breakage is prevented.

Such an absorbent article,
The elastic member in which the tensile force in the longitudinal direction is generated is fixed to the leak-proof wall along the longitudinal direction, and the elastic member reaches at least the position reaching the fixing portion in the longitudinal direction. It is provided over,
It is desirable that the leakage preventing wall is urged to stand up by contraction of the elastic member.
According to such an absorbent article, the leak-proof wall can be reliably erected.

Such an absorbent article,
An attachment portion for attaching the main body portion to underwear is provided on the surface of the main body portion opposite to the surface on which the absorber is superimposed,
The adhering part is preferably provided across the longitudinal direction at the other end part side in the longitudinal direction of the fixed part.
According to such an absorbent article, the underwear also counteracts the tensile force applied from the leak-proof wall that tends to concentrate and act on the end of the fixing portion on the other end side. To do. Therefore, the pulling force applied from the leak-proof wall contributes to the pulling force that acts on the end on the other end side and the vicinity thereof during the pulling operation described above, and promotes the folding of the main body. It will be prevented.

Such an absorbent article,
It is desirable that a rigid element for increasing the rigidity of the main body is provided continuously across the longitudinal direction at the other end in the longitudinal direction of the fixed portion.
According to such an absorbent article, the rigid element also counters the pulling force applied from the leak-proof wall that tends to act on the end on the other end side of the fixed portion. Therefore, the pulling force applied from the leak-proof wall contributes to the pulling force that acts on the end on the other end side and the vicinity thereof during the pulling operation described above, and promotes the folding of the main body. It will be prevented.

Such an absorbent article,
The rigid element is preferably a compression groove formed by compressing the main body portion in a direction in which the absorber is superimposed on the main body portion.
According to such an absorbent article, the rigid element can be provided without particularly providing a separate part, and the configuration of the absorbent article can be simplified.

Such an absorbent article,
The other end of the absorber is movable separately from the body as a free end with the one end joined to the body as a fulcrum,
When the absorbent article is mounted on a human body, the absorbent body may be lifted upward with the other end portion acting as a force.
An absorbent article,
In the joint portion, the absorber may be separably joined to the main body portion.

=== First Embodiment ===
<<< About Absorbent Article 1 >>>
This absorbent article 1 is a sanitary napkin, for example. In the following, the side in contact with the human body is the front side, the side in contact with the underwear 90 is the back side, the end located on the front side of the human body when worn is the front end, and the end located on the rear is the rear end explain. Moreover, the normal line direction of the surface or the back surface of the absorbent article 1 is also called a thickness direction.

  FIG. 1 is a plan view of the surface side of the absorbent article 1 in a developed state, and FIG. 2 is a cross-sectional view taken along the line II-II in FIG. FIG. 3 is a perspective view of the absorbent article 1, and FIGS. 4 to 6 are perspective views of the absorbent article 1 for explaining a state in use.

  As shown in FIG.1 and FIG.2, the absorbent article 1 has comprised the shape long in the predetermined direction as a whole. Hereinafter, the predetermined direction is referred to as a longitudinal direction, and a direction orthogonal to the longitudinal direction is referred to as a width direction. In addition, the said longitudinal direction corresponds with the front-back direction of a human body in a mounting state.

  As shown in FIG. 3, the absorbent article 1 includes a base absorbent body 10 (corresponding to a main body portion of the absorbent article 1) and a surface of the base absorbent body 10, and a center in the width direction of the base absorbent body 10. The top absorbent body 20 (corresponding to the absorbent body) disposed along the longitudinal direction and the both ends of the base absorbent body 10 in the width direction are provided so as to prevent liquid leakage to the outside in the width direction. And a side sheet 40 for forming the leak-proof wall 46.

  Here, the front end 20a of the top absorbent body 20 is joined to the front end 10a of the base absorbent body 10, while the rear end 20b is movable separately from the base absorbent body 10 using the front end 20a as a fulcrum. It is a free end. Therefore, when the absorbent article 1 is used, as shown in FIG. 4, the base absorbent body 10 is adhered and fixed to the inner surface of the undergarment 90 while the longitudinal direction thereof is arranged along the front-rear direction of the human body. When the underwear 90 is put on, the top end 20b is pulled up as shown in FIG. 5 so that the top absorbent 20 enters the groove of the buttocks and the like and is attached to the human body in the state shown in FIG. . Then, the liquid excreted from the groove is mainly absorbed by the top absorbent body 20.

  Incidentally, in this absorbent article 1, as shown in FIG. 1, a vaginal opening facing position Z is located on the center line CL in the width direction of the absorbent article 1 and in front of the center in the longitudinal direction. It is supposed to be located. In other words, in the absorbent article 1, the length on the rear side from the assumed position Z of the vaginal opening is longer than the length on the front side from the position Z.

  Hereinafter, each component of the absorbent article 1 will be described in detail.

<Base absorbent body 10>
7A and 7B are plan views of the surface side of the base absorbent body 10, respectively. FIG. 8 is a plan view of the back side. 9A to 9C are an AA sectional view, a BB sectional view, and a CC sectional view in FIGS. 7A and 7B, respectively. In these drawings, only the outline is virtually indicated by a dotted line while seeing through the top absorbent body 20.

  As shown in FIG. 7A, the planar shape of the base absorbent body 10 is a substantially rectangular shape that is long in the longitudinal direction. However, in the longitudinal direction, a predetermined range that is substantially centered on the estimated position Z facing the vaginal opening is widened in the width direction. The widened portions are so-called wing portions 32 and 32, which will be described later. Hereinafter, a region where the wing portion 32 exists in the longitudinal direction is referred to as a central region Rc, a region in front of the wing portion 32 is referred to as a front region Ra, and a rear region is referred to as a rear region Rb.

  As shown in FIGS. 7A and 9B, a base absorbent body 10 includes an absorbent base material 12 that absorbs a liquid, and a topsheet 14 that is provided so as to cover at least the surface side of the absorbent base material 12 over the entire surface. And a back sheet 30 for preventing leakage of the liquid absorbed by the absorbent base material 12 to the back surface side.

  The absorbent substrate 12 includes a pulverized pulp laminate 12a obtained by laminating pulverized pulp (hereinafter referred to as pulverized pulp) based on a predetermined basis weight distribution pattern, tissue paper that wraps the pulverized pulp laminate 12a, and the like. Liquid permeable sheet (not shown) and a superabsorbent polymer (not shown) mixed in the pulverized pulp laminate 12a, and its external appearance is a substantially rectangular flat plate shape. The basis weight distribution pattern of the pulverized pulp according to the pulverized pulp laminate 12a will be described later (see FIG. 10).

  The top sheet 14 is, for example, a substantially rectangular liquid-permeable sheet whose shape is substantially similar to an eye that is slightly larger than the planar shape of the absorbent body 12. The material is an appropriate non-woven fabric or the like. For example, an air-through non-woven fabric or a spun lace non-woven fabric formed of synthetic resin fibers such as polyester or polyethylene is used after being hydrophilized.

  The surface sheet 14 is embossed with a groove in a predetermined region in a state where it overlaps the absorber base material 12 while a hot-melt adhesive is interposed between the top surface sheet 14 and the absorbent base material 12, Thereby, the surface sheet 14 is joined and integrated with the absorber base material 12. The grooved embossing is performed by compressing a predetermined portion in the predetermined region in the thickness direction of the absorbent article 1 while being heated by a pair of opposing pressing members (not shown). In the predetermined region, a compressed groove 15 is formed which is compressed in the thickness direction (see FIGS. 7A and 9A to 9C).

  Here, one clamping member of the pair of clamping members has a continuous rib-shaped protrusion, and an island-shaped protrusion is further formed on the top of the rib-shaped protrusion. Are provided intermittently with respect to the continuous direction of the protrusions. Further, the surface of the other pressing member facing the rib-shaped protrusion is formed flat. Therefore, as shown in FIG. 7A, the compressed groove 15 formed by the grooved embossing is formed by alternately repeating the depth along the extending direction, that is, the low compression portion 15a compressed at a low compression rate. And the high compression part 15b compressed by the compression rate higher than it is formed in the extension direction of the compression groove | channel 15 by turns.

  When such a compression groove 15 is formed in a predetermined region, the bending rigidity of the predetermined region is increased. Therefore, in the first embodiment, compression is selectively performed mainly on a region requiring bending rigidity. The groove 15 is formed, that is, the compressed groove 15 also functions as a rigidity element for partially increasing the bending rigidity of the base absorbent body 10.

  For example, as shown in FIG. 7A, the compression groove 15 as the rigid element is formed in a predetermined range in the central region Rc and a predetermined range from the center line CL in the width direction to a position separated by a predetermined amount on both sides. Has been. That is, a plurality (4 to 5 in the illustrated example) of compressed grooves 15 along the longitudinal direction are formed in the predetermined range. These compressed grooves 15 serve to make it difficult for the base absorbent body 10 to be deformed in the width direction in the central region Rc, thereby making it difficult for wrinkles along the longitudinal direction of the top absorbent body 20 to be shifted. Specifically, since the crotch of the human body contacts the crotch of the human body, the central region Rc is sandwiched between the crotch in the width direction. The base absorbent body 10 breaks along the center line CL without being squeezed. Then, the base absorbent body 10 folded at the center line CL sandwiches the top absorbent body 20 from both sides, but by this sandwiching, wrinkles and the like along the longitudinal direction are formed on the top absorbent body 20, As a result, the adhesiveness with the groove | channel of the collar part of the top absorber 20 will worsen. Therefore, a compressed groove 15 is formed in the central region Rc to prevent this.

  Further, as shown in FIG. 7A, the compression groove 15 in the central region Rc is formed to extend to the front region Ra in front of the central region Rc, whereby the compression groove 15 as the rigid element is absorbed by the base. The body 10 is extended to a later-described main joining portion 10g (refer to a dark-colored rectangular portion in the figure) to be a portion to which the top absorbent body 20 is joined, and the bending rigidity in the longitudinal direction of this region Has also been raised.

  Incidentally, the reason why the bending rigidity in the longitudinal direction of this region is increased is that when the top absorbent body 20 is pulled up, the rear end edge 10r and the rear part of the main joint portion 10g are in the longitudinal direction. It is easy to bend back (see FIG. 18B) and to prevent this turning back. This folding will be described later.

  The back sheet 30 is a liquid-impermeable sheet made of, for example, polyethylene or polypropylene, and as shown in FIG. 7A, the shape thereof is longer than the absorber base material 12 in the longitudinal direction and in the width direction. The shape is wider than the absorbent substrate 12. Then, as shown in FIG. 9B, in the state where the absorbent base material 12 is bonded to the front surface side of the back sheet 30 with a hot melt adhesive (not shown), the back sheet 30 is at least in FIG. 7A. The front end portion 30 a and the rear end portion 30 b shown in the figure are joined to the topsheet 14 by welding or the like, whereby the absorber base material 12 is held between the backsheet 30 and the topsheet 14.

  As shown in FIG. 8, after the absorbent article 1 is arranged on the inner surface of the undergarment 90, it adheres to the inner surface of the undergarment 90 from the arrangement position after the absorbent article 1 is arranged on the inner surface of the undergarment 90. A “slipping prevention attachment portion 31” for fixing is provided. For example, the anti-slipping attachment portion 31 is a hot-melt adhesive applied to a predetermined range on the back surface 30c of the back sheet 30, and in the illustrated example, a pair of anti-slipping attachment portions 31, 31 are formed continuously from the front end portion 10a to the rear end portion 10b of the base absorbent body 10 with a predetermined interval in the width direction. Note that the mode of the anti-slip attachment part 31 is not limited to this. For example, by applying a hot-melt adhesive to the portion between the left and right anti-slip attachment parts 31, 31, You may make the attachment part 31 for a stop into one area | region continuous in the width direction.

  Further, in order to make the slippage between the underwear 90 and the absorbent article 1 stronger, as shown in FIG. 8, wing portions 32, 32 are provided at both ends in the width direction of the back sheet 30 in the width direction. The wing portions 32, 32 are provided with “an anti-displacement attachment portion 33” on the back surface thereof. That is, for example, a hot-melt adhesive is also applied to the back surfaces of the wing portions 32. Then, the wings 32 and 32 are folded outward as shown in FIG. 4, and are attached and fixed to the outer surface of the undergarment 90 by the anti-displacement attaching part 33.

  Incidentally, it is desirable that a hot-melt adhesive is interposed between the top sheet 14, the absorbent substrate 12, and the back sheet 30 described above.

FIG. 10 is a basis weight distribution diagram of the pulverized pulp according to the pulverized pulp laminate 12a. In the drawing, the basis weight distribution is shown not only in a plan view but also in a sectional view. Moreover, the numerical value in the figure represents the basic weight (g / m < ² >) of the ground pulp of the area | region pointed out by the arrow.

As shown in FIG. 10, basically, pulverized pulp is laminated with a basis weight (eg, 200 g / m ² ) of a predetermined reference value over the entire area of the pulverized pulp laminate 12a. However, there are some areas where the basis weight is larger or smaller than this reference value.

For example, as shown in FIG. 10, in a rectangular area (refer to an area indicated by a dark color in the drawing) having the vaginal opening facing position Z substantially in the center in the width direction and the longitudinal direction, A larger basis weight (for example, 500 g / m ² ) is set. This also has the meaning of effectively absorbing the fluid excreted from the vaginal opening, but also has the meaning of increasing the bending rigidity of this rectangular region. That is, the rectangular region generally corresponds to a region where the compression groove 15 as a rigid element is formed in the above-described front region Ra and central region Rc. Therefore, even if the basis weight is large, the bending rigidity of the region where the compressed groove 15 is formed can be increased, thereby effectively supporting the action of increasing the bending rigidity of the compressed groove 15.

Moreover, the area | region of the basis weight (for example, 100 g / m < ² >) smaller than the said reference value exists in the part of the both sides of the width direction of this rectangular area adjacent to the said rectangular area. These regions function as a folding starting point for the base absorbent body 10 to be easily bent at the position in the width direction. This is because, when the bending rigidity of the central region Rc described above is uniformly high over the entire width in the width direction, the central region Rc that is generally set wider than the assumed width between the crotch is sandwiched between the crotch at the time of wearing. In this case, there is no escape space of the central region Rc having an excessive width, and the entire central region Rc is inclined obliquely with respect to the crotch, so that the wearability is deteriorated. That is, the pair of the regions in the width direction is folded along the longitudinal direction as a fold starting point, thereby absorbing the difference in width between the assumed width between the crotch and the central region Rc.

  Furthermore, as shown in FIG. 10, in the predetermined range of the rear region Rb (refer to the range shown by hatching in the figure), the basis weight of the pulverized pulp at the center in the width direction is set in the width direction. It is less than the basis weight of the parts on both sides. This predetermined range is a region corresponding to the anus of the human body and its peripheral part, that is, a part that is most deeply likely to enter a groove such as a buttocks. Therefore, by reducing the basis weight of the central portion in the width direction, the predetermined range can be easily folded so that the surface side is mountain-folded at the center in the width direction, whereby the portion of the predetermined range in the base absorbent body 10 However, it is easy to enter into a groove such as a buttocks of a human body.

<Top absorber 20>
FIG. 11 is a plan view of the top absorbent body 20 in a developed state. 12A to 12D are an AA sectional view, a BB sectional view, a CC sectional view, a DD sectional view, and an EE sectional view, respectively, in FIG. .

As shown in FIGS. 11, 12 </ b> B, and 12 </ b> C, the top absorbent body 20 is disposed on the surface side of the pulverized pulp laminate 22 (corresponding to a liquid absorbent member) that absorbs liquid and the pulverized pulp laminate 22. An intermediate sheet 23, and a shape-retaining sheet 24 for wrapping the pulverized pulp laminate 22 and the intermediate sheet 23 together, and holding the pulverized pulp laminate 22 and the like in a long shape in the longitudinal direction; ing.
The pulverized pulp laminate 22 is formed by laminating pulverized pulp mixed with a superabsorbent polymer based on a predetermined basis weight distribution pattern into a substantially rectangular parallelepiped shape. The basis weight distribution pattern will be described later (see FIG. 14).

 The intermediate sheet 23 is a rectangular liquid-permeable sheet that has better liquid drawability than the shape-retaining sheet 24. As the material thereof, for example, an air-through nonwoven fabric formed of synthetic resin fibers such as polypropylene is used. The The intermediate sheet 23 is subjected to hole embossing in a state where it is overlapped with the shape-retaining sheet 14, whereby the intermediate sheet 23 is joined and integrated with the shape-retaining sheet 24 (see FIGS. 12B to 12D). .

 Incidentally, the hole embossing is performed using a pair of processing members (not shown) opposed to each other. That is, one processing member is provided with a conical protrusion, and the other opposing processing member is provided with a hole into which the protrusion enters. The processed member on which the protrusion is formed is heated, and the conical protrusion passes through the intermediate sheet 23 and the shape-retaining sheet 24 that are overlapped with each other, and a large number of holes 28 (FIG. 1 or FIG. 11 is formed, the intermediate sheet 23 is joined and integrated with the shape-retaining sheet 24 by heat-sealing the hole edges.

 The shape-retaining sheet 24 is a liquid-permeable sheet, and the same material as the surface sheet 14 of the base absorbent body 10 is used as the material, for example. The planar shape when the shape retaining sheet 24 is flatly developed into a sheet shape is substantially rectangular. Then, with the hot melt adhesive applied to the entire surface of the shape retaining sheet 24 in the developed state, the shape retaining sheet 24 is rolled into a cylindrical shape as shown in FIG. 12B, and both end portions 24e in the width direction thereof. , 24e are overlapped and joined with a hot melt adhesive, the pulverized pulp laminate 22 and the intermediate sheet 23 are accommodated in the longitudinal direction inside the cylinder.

 Further, in the shape retaining sheet 24 shown in FIG. 11, the front portion 24 c and the rear portion 24 d in the longitudinal direction are not in the state of the pulverized pulp laminate 22 and the intermediate sheet 23 as shown in FIGS. 12A and 12E, respectively. In addition, the folded portions 24c and 24d are subjected to pressure bonding by embossing in a state where a hot melt adhesive (not shown) is interposed, whereby the front end portion 24c in the longitudinal direction of the shape retaining sheet 24 is applied. The rear end portion 24d is sealed to form thin sealing portions 25 and 26 having a rectangular shape in plan view (see FIG. 11).

 Incidentally, the above-mentioned embossing is performed by clamping the workpiece by a pair of clamping members (not shown) facing each other. That is, a protrusion is formed on one of the pair of pressing members, and a surface of the other pressing member that faces the protrusion is formed flat. And since the front-end | tip of the said protrusion is formed flat here, when pinched | interposed into these pair of pressing members, the recessed part which has a flat bottom part is squeezed and formed in the said process object, The said recessed part is formed. Embossed.

  As shown in FIG. 1, such a top absorbent body 20 is substantially the same length as the base absorbent body 10 in the longitudinal direction, but is narrower than the base absorbent body 10 in the width direction. On the surface side of the body 10, the center lines CL in the width direction are aligned and overlapped. As shown in FIGS. 2 and 3, the front end 20a of the top absorbent body 20 is firmly joined to the front end 10a of the base absorbent body 10, and the other parts are basically not joined. Thus, the rear end portion 20b of the top absorbent body 20 is turnable in the front-rear direction with the front end portion 20a as a fulcrum.

  Here, the term “joint” means that if the top absorbent body 20 and the base absorbent body 10 are intentionally separated, at least one of the top absorbent body 20 and the base absorbent body 10 may be damaged. This refers to an inseparable state that is firmly joined to the extent. Examples of the main bonding method include adhesion using a hot wire adhesive having a thick wire diameter capable of strong bonding, and the embossing with the groove described above. Here, the former bonding is adopted. Yes.

  FIG. 13 is an explanatory view of the state of the main bonding by this bonding, and shows the front end portion 10a of the base absorbent body 10 in an enlarged manner. In the following, a portion at the front end portion 10a of the base absorbent body 10 and where the front end portion 20a of the top absorbent body 20 is finally joined is referred to as a “main joined portion 10g”. The range of the main joint portion 10g is indicated by a dark color in FIG. 13. The main joint portion 10g is set at the center in the width direction of the front region Ra of the base absorbent body 10, and the planar shape thereof is shown in FIG. The top absorbent body 20 shown in FIG. A hot melt adhesive (in the drawing) has a predetermined coating pattern, for example, a pattern in which a plurality of straight lines along the longitudinal direction are arranged in the width direction in the illustrated example. In this case, at least the front-side sealing portion 25 of the top absorbent body 20 is overlapped and bonded to the main joint portion 10g, so that the top absorbent body as shown in FIG. The front end 20 a of 20 is finally joined to the front end 10 a of the base absorbent body 10.

  Here, the target part of the main bonding on the top absorbent body 20 side may be the front sealing part 25 only. However, in the first embodiment, as shown in FIG. It extends not only to the stop 25 but also to the portion where the pulverized pulp laminate 22 is present from the rear. That is, as shown in FIG. 2, the length Lg in the longitudinal direction of the main joining portion 10 g is longer than the length La of the sealing portion 25 on the front side of the top absorbent body 20. This is because when only the front sealing portion 25 is joined, there is a possibility that the rigidity becomes too small because the sealing portion 25 is thin. In this case, the top absorbent body as a whole This is because 20 is likely to be wobbling back and forth and difficult to handle.

  By the way, the sealing portion 26 on the rear side of the top absorbent body 20 shown in FIG. 11 may be temporarily joined to the base absorbent body 10 when not used. Here, the term “temporary bonding” refers to a state in which the user is easily bonded to such an extent that the user can easily separate the top absorbent body 20 from the base absorbent body 10 without impairing the functions of the base absorbent body 10 and the top absorbent body 20. Examples of the temporary bonding method include the aforementioned embossing.

  In this temporarily joined state, the rear sealing portion 26 protrudes backward by about 20 mm from the outer contour of the base absorbent body 10 to such an extent that the user can pick it up (see FIG. 1). ) That is, the rear end portion of the sealing portion 26 on the rear side functions as a knob portion 26a for the user to pick when wearing it.

  Further, as shown in FIG. 11, a locking member for locking the rear end portion 20 b of the top absorbent body 20 to the rear region Rb of the top sheet 14 of the base absorbent body 10 on the back surface side of the top absorbent body 20. 27 is provided. Specifically, the locking member 27 is provided in a portion in the latter half of the top absorbent body 20 and in front of the sealing portion 26 on the rear side. Then, as shown in FIG. 6, the movement of the top absorbent body 20 during use of the absorbent article 1 is restricted by the locking member 27, and the position of the top absorbent body 20 is adjusted at the time of wearing. Maintained in position. For example, a male material of a mechanical fastener is used as the locking member 27. In that case, a female material of a mechanical fastener may be provided on the base absorbent body 10 side in order to increase the locking force. The installation position of the locking member 27 may be other than the above. For example, the locking member 27 may be provided in the rear sealing portion 26 and locked to the undergarment 90 at the time of mounting. Further, since the top absorbent body 20 in the mounted state is sandwiched in a groove such as a buttocks, the top absorbent body 20 can be fixed to the human body without the locking member 27 described above. Therefore, the locking member 27 is not an essential component and may be omitted.

  Further, as shown in FIG. 11 and FIG. 12D, the rear end portion 20 b of the top absorbent body 20 and at least a portion where the pulverized pulp laminate 22 is present are covered with the pulverized pulp laminate 22 from the back surface side to prevent it. A leakage sheet 51 is provided. The leak-proof sheet 51 is a liquid-impermeable sheet and has a function of preventing the liquid absorbed by the pulverized pulp laminate 22 from oozing out to the outer surface of the top absorbent body 20. That is, when the absorbent article 1 is used, the rear end portion 20b of the top absorbent body 20 may protrude rearward from the rear end edge 10e of the base absorbent body 10 as shown in FIG. If the liquid is oozing out on the outer surface of the rear end portion 20b of the top absorbent body 20, the underwear 90 is soiled when the rear end portion 20b of the top absorbent body 20 comes into contact with the underwear 90. The sheet 51 prevents the rear end portion 20b from exuding to the outer surface on the back surface side. As a material of the leak-proof sheet 51, a non-porous film such as polyethylene or polypropylene that can completely block the liquid is desirable, but it may not be completely blocked, and may be, for example, a nonwoven fabric made of water-repellent fibers.

FIG. 14 is a basis weight distribution diagram of pulverized pulp according to the pulverized pulp laminate 22. In the drawing, the basis weight distribution is shown not only in a plan view but also in a sectional view. Moreover, the numerical value in the figure represents the basic weight (g / m < ² >) of the ground pulp of the area | region pointed out by the arrow.
As shown in FIG. 14, basically, the portion other than the aforementioned front sealing portion 25 and rear sealing portion 26 has a basis weight substantially equal to the reference value over the entire area in the longitudinal direction and the width direction. The pulverized pulp is laminated at (for example, 500 g / m ² ). However, a region where the basis weight is smaller than the reference value partially exists.

  For example, as shown in a plan view in FIG. 14, the portions where the basis weight of the pulverized pulp is reduced in the width direction in the three places P1, P2, and P3 in the longitudinal direction than in the portions adjacent to each other in the longitudinal direction. Is present. These portions are for facilitating folding of the absorbent article 1 into four during individual packaging described later. That is, the longitudinal positions P1, P2, and P3 of these portions respectively correspond to the folding positions at the time of individual packaging. Hereinafter, the folding position P1 on the rear end side is referred to as a first folding position P1, the folding position P3 on the front end side is referred to as a third folding position P3, and the central folding position P2 between these is referred to as a second folding position. Say position P2.

  Moreover, as shown in FIG. 14, in the predetermined range of the top absorbent body 20 in the longitudinal direction (refer to the range shown by diagonal lines in the figure), the basis weight of the pulverized pulp at the center in the width direction is The basis weight of both sides in the width direction is less. This predetermined range is a region corresponding to a portion from the perineum to the anus of the human body, that is, a portion that enters the groove such as the buttocks deeper in the top absorbent body 20. Therefore, by reducing the basis weight of the central portion in the width direction, the top absorbent body 20 is easily folded so that the surface side is mountain-folded at the center in the width direction. The part quickly enters a groove such as a buttocks of a human body. Incidentally, although the aforementioned locking member 27 is virtually shown by a dotted line in the figure, its installation position is located behind the predetermined range. Therefore, even if the predetermined range is folded in a mountain fold shape, the locking member 27 is not easily folded in a mountain fold shape, so that the locking member 27 can maintain a substantially flat state, and the base absorbent body 10 is brought into a surface contact state. Securely locked.

<Side sheet 40>
The side sheet 40 is for forming a liquid-impermeable leak-proof wall 46 in the vicinity of both end portions in the width direction of the absorbent body base 12 as shown in FIG. 9B. As shown, the top sheet 14 is provided along the longitudinal direction from the top side.

  Specifically, as shown in FIG. 7B, the pair of side sheets 40, 40 are arranged in line symmetry with respect to the center line CL in the width direction, and along the longitudinal direction with a predetermined interval therebetween. The back sheet 30 extends from the front end 30 a to the rear end 30 b, that is, to the outer contour of the absorbent article 1. Then, as shown in FIG. 9B, the side sheets 40 and 40 are respectively crimped and fixed to the top sheet 14 at positions near the both end portions in the width direction of the absorbent base material 12 to form a base end portion 44. The end 46 extending from the base end 44 toward the center line CL in the width direction is a free end. That is, the side sheets 40, 40 are folded back to the outside in the width direction at the end portion 46, and the side sheets 40 are bonded together by a hot melt adhesive in a stacked state. Between the sheets, an elastic member 48 such as a rubber thread is intermittently fixed by a hot melt adhesive along the longitudinal direction in a stretched state. Therefore, when the absorbent article 1 is bent in the longitudinal direction so that the topsheet 14 side is the inside, the elastic member 48 contracts in the longitudinal direction, and as a result, the end portion 46 becomes the topsheet as shown in FIG. 9B. 14 is a leak-proof wall 46.

  Note that in the side sheet 40, the two sheets are overlapped at the position of the base end portion 44 as shown in FIG. However, the outer end edge extends to the outer contour of the back sheet 30, that is, the outer contour of the absorbent article 1. . And the said outer edge (refer the part shown with a hatching in FIG. 7B) is joined by the thermocompression bonding etc. over the outer edge of the width direction of the back surface sheet 30 and a longitudinal direction.

  FIG. 15 is a plan view of the base absorbent body 10 for explaining the planar position of the base end portion 44. As shown in the drawing, the base end portion 44, which is a portion fixed to the base absorbent body 10 in the side sheet 40, extends along the longitudinal direction over the entire length of the base absorbent body 10 in the longitudinal direction. Is set. However, although the width of the base end portion 44 is wide at the front end portion and the rear end portion in the longitudinal direction, the inner portion in the width direction is at the base end portion between the front end portion and the rear end portion. 44, the width is narrowed and the position in the width direction is slightly shifted outward. This is because a pocket Pk is formed in the lower portion of the leak-proof wall 46 at this intermediate portion as shown in FIG. 9B, thereby increasing the amount of liquid that can be dammed.

  By the way, the said edge part 46 which is a leak-proof wall shown to FIG. 7B is fixed in the state which was turned down to the base absorber 10 side, as shown to FIG. 9A and 9C in the front-end part 46a and the rear-end part 46b. The portions 47a and 47b are adhesively fixed on the side sheet 40, and are non-standing portions that do not stand up. These fixing portions 47a and 47b are formed, for example, by applying a hot melt adhesive in a rectangular shape. Then, by changing the positions and lengths of the fixing portions 47a and 47b in the longitudinal direction, as shown in FIG. 3, a leak-proof wall existing between the front fixing portion 47a and the rear fixing portion 47b. The standing state of 46 is adjusted. Incidentally, as shown in FIG. 7B, the elastic member 48 is provided to reach the fixing portions 47a and 47b in the longitudinal direction. Therefore, the leak-proof wall 46 positioned between the fixed portion 47a and the fixed portion 47b is positively biased so as to stand up. Further, as shown in FIG. 15, the positions of the fixing portions 47a and 47b in the longitudinal direction are formed at substantially the same positions as the wide portions corresponding to the wide portions of the base end portion 44.

  Such a side sheet 40 is made of a hydrophobic sheet, and as the material thereof, for example, a spunbonded nonwoven fabric formed of synthetic resin fibers such as polypropylene and polyethylene is used.

<<< Individual packaging of absorbent article 1 >>>
FIG. 16A thru | or FIG. 16D is explanatory drawing of a mode that the absorbent article 1 is separately packaged.
At the time of individual packaging, first, as shown in FIG. 16A, with the wings 32, 32 on both sides of the absorbent article 1 being open, as shown in FIG. Protection sheets 35 and 35 for protecting the adhesive strength of the portions 33 and 33 are provided so as to cover the wing portions 32 and 32. And in this covered state, these wing parts 32 and 32 are each bent to the surface side as shown in FIG. 16C, but in this case, the adhesive previously applied to one protective sheet 35 The two protective sheets 35 and 35 are connected and integrated by the overlapped portion at the center in the width direction by 35a.

  Incidentally, these protective sheets 35, 35 have a role of forming the anti-slipping attachment part 33 on the back surface of the wing part 32 in addition to the role of protecting the adhesive force of the above-described anti-slipping attachment part 33. That is, a release agent and a hot-melt adhesive are applied to these protective sheets 35 and 35 in advance before being provided on the wing portions 32 and 32. And after covering the wing parts 32 and 32 with the protection sheets 35 and 35 as mentioned above, when the user peels off the protection sheets 35 and 35 from the wing parts 32 and 32 to use the absorbent article 1, for example, Due to the action of the release agent, the hot melt adhesive is transferred to the wing portions 32 and 32 and remains, so that anti-slip attachment portions 33 and 33 are formed on the wing portions 32 and 32. Yes.

  The protective sheet having such a role is separately provided on the back surface 30 c of the back sheet 30. That is, as described above, since the anti-slip attachment portions 31 and 31 are also formed on the back surface 30c of the back sheet 30, the protective sheet 34 is formed on the back sheet 30 as virtually indicated by a two-dot chain line in FIG. It is provided so as to cover the back surface 30c.

  When the protective sheets 34 and 35 are thus provided on the absorbent article 1 as described above, the absorbent article 1 is provided with a substantially rectangular packaging sheet 36 disposed on the back side as shown in FIG. 16D. At the same time, it is folded at three points P1, P2 and P3 in the longitudinal direction and folded into four.

  FIG. 17A thru | or FIG. 17D is a top view which shows a mode that this absorbent article 1 is folded in four. FIG. 17A shows the absorbent article 1 before being folded, and FIG. 17B shows that the absorbent article 1 is folded at the first folding position P1 set on the rear end side of the absorbent article 1. It shows a state. Moreover, FIG. 17C shows a state in which the absorbent article 1 is bent at the second folding position P2 set on the center side of the absorbent article 1, and FIG. 17D shows the front end portion of the absorbent article 1. The mode that the absorbent article 1 is bent in the 3rd folding position P3 set to the side is shown.

  As shown in FIG. 17B, first, at the first folding position P1 on the rear end side, the rear end side portion is bent up to the surface side, and the rear end side portion is an absorbent article. It is overlapped on the surface side of 1 and becomes a two-step stack. Next, as shown in FIG. 17C, at the second folding position P2 on the center side, the two-tiered portion is further bent up to the surface side, whereby the two-tiered portion is absorbed. It overlaps with the surface side of the property article 1, and becomes 3 steps | paragraphs. Then, as shown in FIG. 17D, at the third folding position P3 on the front end side, the part on the front end side is bent up, and the part on the front end side is overlapped with the above-described three-tiered part. Combined to form 4 layers. In the four-tiered state, that is, in the four-fold state, the lead tape 38 at the front end of the packaging sheet 36 is attached to the outer surface of the three-tiered portion, and the absorbent article 1 is fixed in the four-fold state. .

  Then, finally, as shown in FIG. 17D, the outer edge 36c along the longitudinal direction of the packaging sheet 36 is bonded and sealed into a bag shape, and with this, the absorbent article 1 is individually packaged. Become.

<<< Installation of Absorbent Article 1 to Human Body >>>
In the absorbent article 1 that has reached the user's hand in the above-described individual packaging state, the packaging sheet 36 is opened by the user peeling off the lead tape 38, and accordingly, the protective sheet 34 and the protective sheet 35 are peeled off. Thus, the anti-slipping attachment part 31 on the back surface 30c of the back sheet 30 and the anti-slipping attachment part 33 on the back surface of the wing part 32 are exposed.

  Then, the absorbent article 1 is disposed on the inner surface of the undergarment 90 as shown in FIG. 4 and fixedly adhered to the inner surface of the undergarment 90 by the anti-displacement adhering portion 31, and the wing portion 32 is on the undergarment 90 side. And is attached and fixed to the outer surface of the undergarment 90 by the anti-displacement attaching portion 33.

  When the absorbent article 1 is attached and fixed to the undergarment 90 in this way, the undergarment 90 is pulled up to the human body side, that is, put on the user. If it does so, as shown in FIG. 5, the knob | pick part 26a of the top absorber 20 will be picked by the user, and the top absorber 20 will be pulled up, and, thereby, temporary joining of the base absorber 10 and the top absorber 20 is carried out. The rear end portion 20 b of the top absorbent body 20 is separated from the base absorbent body 10 by being released.

  Thereafter, when the user pulls the knob 26a rearward in the longitudinal direction, the position of the top absorbent body 20 is adjusted so that the top absorbent body 20 enters and adheres to a groove such as a buttocks of a human body. Then, with the top absorbent body 20 adjusted in position, as shown in FIG. 6, the locking member 27 of the top absorbent body 20 is locked and fixed to the inner surface of the base absorbent body 10 or the undergarment 90. The top absorbent body 20 is positioned in a state where it is preferably abutted.

<<< Problems when wearing absorbent article 1 >>>
18A and 18B are schematic views for explaining problems when the absorbent article 1 is mounted. In both figures, the wearing state of the absorbent article 1 on the human body is shown in a longitudinal sectional view of the human body center (groin).

  As described above, when the absorbent article 1 is mounted on a human body, the rear end portion 20b of the top absorbent body 20 is pulled rearward to adjust its position (see FIG. 18A). At this time, a tensile force Ft is applied to the top absorbent body 20, and this tensile force Ft is transmitted to the base absorbent body 10 via the main joint portion 10g. It acts on the edge 10r in a concentrated manner (see also FIG. 2). Therefore, the base absorbent body 10 is easily folded back in a Z-shape in cross section as shown in FIG. 18B at the rear end edge 10r and the vicinity thereof. Specifically, first, the rear edge 10r is bent into a V shape, and further, the vicinity thereof is bent into a V shape. As a result, the rear edge 10r is bent back into a Z shape as shown in FIG. 18B. If folded in this way, a gap G is formed between the base absorbent body 10 and the crotch, and the adhesion of the base absorbent body 10 and the top absorbent body 20 to the crotch is impaired, which is not preferable.

  Incidentally, a force similar to the pulling force Ft may separately act on the base absorbent body 10. This is a force caused by the leak-proof wall 46. That is, as described above, the leak-proof wall 46 is urged by the elastic member 48 so as to stand up from the surface of the base absorbent body 10, thereby standing up independently. As shown in FIGS. 7B and 3, the front end portion 46a of the leak-proof wall 46 is bonded and fixed by the fixing portion 47a in a state where the front end portion 46a is laid on the surface of the base absorbent body 10 and overlapped therewith. Therefore, a tensile force acts on the base absorbent body 10 from the front end portion 46a of the leak-proof wall 46 to be erected in the fixing portion 47a. That is, the fixing portion 47a has the same kind as the above-described tensile force Ft. The pulling force of (generally in the same direction) acts.

  Here, when the fixing portion 47a is located in the vicinity of the rear end edge 10r of the main joining portion 10g, the pulling force acting on the fixing portion 47a becomes the pulling force Ft during the pulling operation. In addition, the folding at the rear edge 10r during the pulling operation may be promoted.

  Therefore, in the first embodiment, by devising the positional relationship in the longitudinal direction between the fixed portion 47a related to the front end portion 46a of the leak-proof wall 46 and the rear end edge 10r of the main joint portion 10g, This prevents the problem of folding. Hereinafter, this positional relationship will be described.

<<< Positional relationship between the fixing portion 47a of the leak-proof wall 46 and the rear end edge 10r of the main joining portion 10g >>>>
As shown in FIG. 7B, in the first embodiment, the rear end edge 10r of the main joint portion 10g is positioned closer to the rear end portion than the fixed portion 47a related to the front end portion 46a of the leakage prevention wall 46. Thus, the tensile force applied from the leak-proof wall 46 to the fixing portion 47a does not promote the bending of the base absorbent body 10 during the pulling operation.

  The reason why the promotion of folding is reduced by such a positional relationship is as follows. The tensile force applied to the fixing portion 47a from the front end portion 46a of the leak-proof wall 46 acts on the front end portion side of the main joint portion 10g rather than the rear end edge 10r. The top absorbent body 20 is joined to the front end side portion by the main joining portion 10g, and the bending rigidity of the base absorbent body 10 at the front end side portion is stiffened and enhanced. Therefore, even if a tensile force applied from the front end portion 46a of the leak-proof wall 46 to the fixing portion 47a acts on the front end portion side portion of the base absorbent body 10, the stiffened high bending rigidity is provided. As a result, it is possible to effectively prevent the folding of the base absorbent body 10 in the rear end edge 10r and the vicinity thereof during the pulling operation.

  Incidentally, the positional relationship that “the rear end edge 10r of the main joint portion 10g is located closer to the rear end portion than the fixing portion 47a” is, of course, a part of the fixing portion 47a. That is, it is not located behind the edge 10r. Therefore, the above-described positional relationship can also be rephrased as “the rear end 47s of the fixing portion 47a is located in front of the rear end edge 10r of the main joining portion 10g”.

  By the way, in this 1st Embodiment, the tension | tensile_strength which acts on the said fixing | fixed part 47a does not promote the bending of the base absorber 10 in the said rear-end edge 10r besides the device by the above-mentioned positional relationship. Ingenuity to make it.

  For example, as described above, in the central region Rc of the base absorbent body 10, the compression groove 15 is formed as a rigid element that increases the bending rigidity in the longitudinal direction. As shown in FIG. 15 is provided continuously across the rear end 47s of the fixing portion 47a. Accordingly, the bending rigidity of the base absorbent body 10 at the position of the rear end 47 s is increased, so that it can effectively counter the tensile force acting on the fixing portion 47 a, and as a result, is applied from the leak-proof wall 46. It is possible to suppress the tensile force that is applied from promoting the folding of the base absorbent body 10 at the rear end edge 10r of the main joint portion 10g. Incidentally, here, the rear end 47s of the fixing portion 47a is stiffened by the rigid element 15 because the tensile force applied from the leak-proof wall 46 to the fixing portion 47a is particularly applied to the rear end 47s of the fixing portion 47a. This is because it is easy to concentrate and act.

  Further, as shown in FIG. 7B and FIG. 8, the attachment portion 31 for preventing the deviation of the back surface 30c of the back sheet 30 is continuously extended across the rear end 47s of the fixing portion 47a in the longitudinal direction. Is provided. Therefore, at the position of the rear end 47s, the undergarment 90 can also cooperate with the tensile force acting on the fixing portion 47a. That is, the undergarment 90 also has a base in a direction to increase the bending rigidity of the base absorbent body 10. Assist the absorbent body 10. Therefore, it is possible to suppress the tensile force applied from the leak-proof wall 46 from promoting the folding of the base absorbent body 10 at the rear end edge 10r of the main joint portion 10g.

=== Second Embodiment ===
In FIG. 19 thru | or FIG. 21, explanatory drawing of the absorbent article 1 of 2nd Embodiment is shown. FIG. 19 is a perspective view of the absorbent article 1. FIG. 20 is a plan view of the surface side of the base absorbent body 10, and FIG. 21 is a plan view of the surface side of the top absorbent body 20. In addition, about FIG. 20, the outline of the top absorber 20 is virtually shown with the dotted line.

  In the first embodiment, the top absorbent body 20 and the base absorbent body 10 are permanently joined at the final joined portion 10g so as not to be separated, but in the second embodiment, as shown in FIG. It is different in that it can be separated at a portion corresponding to the portion 10g (hereinafter referred to as a joint portion 10k).

  That is, as shown in FIGS. 19 to 21, the planar size of the joint portion 10k and the position of the base absorbent body 10 are the same as those of the main joint portion 10g of the first embodiment, but the joint portion 10k. The female material 65 of the mechanical fastener is fixed to the back surface side of the front end portion 20a of the top absorbent body 20 (the front-side sealing portion 25 and the vicinity of the rear side) corresponding to the female material 65. A male material 63 of a mechanical fastener is fixed, whereby the top absorbent body 20 and the base absorbent body 10 are detachable at the joint portion 10k.

  The male material 63 of the mechanical fastener is, for example, a rectangular sheet material with a hook-shaped protrusion on one side, and more preferably, the shape of the protrusion is a mushroom type. This is because if the mushroom type is used, the locking directionality is lost and a high locking force can be exerted evenly in any direction. As a result, even if the top absorbent body 20 is slightly swung back and forth and left and right in the process of pulling up the undergarment 90 after joining the top absorbent body 20 to the base absorbent body 10, it is difficult for the base absorbent body 10 to fall off. Become.

  On the other hand, the female material 65 of the mechanical fastener is, for example, a rectangular sheet material in which a large number of loops are formed on one surface so that the projection of the male material 63 is caught. However, the female member 65 is not an essential component. The reason is that since the top sheet 14 of the base absorbent body 10 is formed of a nonwoven fabric, the male material 63 of the top absorbent body 20 can be expected to have a certain degree of locking force even with the nonwoven fabric. However, as a nonwoven fabric for the surface sheet 14, a nonwoven fabric having a good texture is often used from the viewpoint of touchability, and in that case, the entanglement strength of the constituent fibers of the nonwoven fabric is weakened and sufficient bonding strength is ensured. There is a possibility that it cannot be done. Therefore, desirably, the female member 65 is fixed to the joint portion 10k of the base absorbent body 10 as in the second embodiment described above.

  Further, it is preferable to use a female member 65 having a color tone different from that of the top sheet 14 so that the joint portion 10k is visually clear. Then, the top absorbent body 20 and the base absorbent body 10 When joining the two, it is possible to prevent a situation in which the joining position is shifted and sufficient joining strength cannot be secured.

  In the second embodiment, the female material 65 is provided on the base absorbent body 10 side and the male material 63 is provided on the top absorbent body 20 side.

  Furthermore, without using the mechanical fasteners 65 and 63, an adhesive is applied to at least one of the joint portion 10k and the front end portion 20a, and the application area of the adhesive is made of a release paper coated with a release agent. It may be covered and bonded before the user uses the absorbent article 1 by peeling the release paper to expose the adhesive.

  By the way, in such a separable configuration, the user of the absorbent article 1 may be allowed to perform a joining operation between the base absorbent body 10 and the top absorbent body 20, and in that case, provided to the user. As a packaging form at the time of being done, the following two types of packaging forms can be illustrated.

  The first packaging form is substantially the same as the first embodiment of FIGS. 17A to 17D. In other words, the top absorbent body 20 is folded together in a folded state in a state where the top absorbent body 20 is superposed on the base absorbent body 10, and is wrapped together with a single packaging sheet 36. However, at the time of packaging, the base absorbent body 10 and the top absorbent body 20 may or may not be joined at the joint portion 10k. Then, the package body in which the top absorbent body 20 and the base absorbent body 10 are packaged together in this way is collected in a predetermined number and accommodated in one bag, and the bag is supplied to the market as a minimum unit for sale. Is done.

  On the other hand, the 2nd packaging form is an aspect which wraps the base absorber 10 and the top absorber 20 separately, as shown in FIG.20 and FIG.21. That is, as shown in FIG. 20, only the base absorbent body 10 is placed on the packaging sheet 36, and the base absorbent body 10 together with the packaging sheet 36 is in a predetermined folding position P1, P2, P3. In that state, the outer edge in the width direction of the packaging sheet 36 is adhesively sealed along the longitudinal direction to form a bag, and the base absorbent body 10 is accommodated in the package and packaged. Is done. On the other hand, as shown in FIG. 21, the top absorbent body 20 is also placed on a separate packaging sheet 37 from the above, and the top absorbent body 20 together with the packaging sheet 37 has a predetermined shape. It is folded in four at the folding positions P1, P2, and P3, and in that state, the outer edge in the width direction of the packaging sheet 37 is adhesively sealed along the longitudinal direction to form a bag, and the top absorbent is absorbed therein. The body 20 is accommodated and packaged. Incidentally, the folding positions P1, P2, and P3 are the same as the folding positions P1, P2, and P3 of the first embodiment, that is, the top absorbent body 20 has the pulverized pulp at the folding positions P1, P2, and P3. The basis weight is smaller than that of the surrounding portion, and it is easy to bend (see FIG. 14).

  Then, the package of the base absorbent body 10 and the package of the top absorbent body 20 that are packaged in this way are each combined into a predetermined number and accommodated in separate bags to generate two containers. Furthermore, these two containers are accommodated together in one bag, and the bag is supplied to the market as a minimum unit for sale.

  However, the minimum unit of sale is not limited to this. For example, the top absorbent body 20 and the base absorbent body 10 may be sold separately using the container as the minimum unit of sale. Incidentally, when sold separately in this way, there are the following advantages. That is, it is not necessary to separately purchase the absorbent articles for daytime and night use, and the housing inventory of the absorbent articles can be reduced. Details are as follows. Only the base absorbent body 10 is used as an absorbent article for daytime with less menstrual blood, while the top absorbent body 20 is joined to the base absorbent body 10 when used for nighttime with much menstrual blood. . That is, the absorbent article for the daytime can be used after being transformed for the nighttime, thereby reducing the housing inventory. In addition, when the top absorbent body 20 sufficiently absorbs menstrual blood after being used for a predetermined time, it is possible to replace only the top absorbent body 20 without replacing the base absorbent body 10, As the base absorber 10 is replaced less frequently, dust can be reduced.

  Incidentally, as a material of the packaging sheet 37 for the top absorbent body 20 used in the second packaging form shown in FIG. 21, for example, an SMS nonwoven fabric (a three-layer structure in which a melt-blown nonwoven fabric is sandwiched between upper and lower spunbond nonwoven fabrics) Non-woven fabric). If this is a non-woven fabric, the male material 63 of the mechanical fastener can be effectively locked between the fiber gaps. Therefore, the male material 63 and the locking of the both ends 20a, 20b in the longitudinal direction of the top absorbent body 20 This is because the both ends 20a and 20b can be locked and fixed to the packaging sheet 37 by the male material of the member 27, and the positional deviation in the width direction of the top absorbent body 20 when folded in four can be effectively suppressed. By the way, the reason why it is better to suppress the positional deviation in the width direction is that when the user unwraps the packaging, if the top absorbent body 20 is bent with respect to the packaging sheet 37, the visual impression becomes worse. It is.

  Among the foldings at the first to third folding positions P1, P2, and P3, the folding that is most likely to occur is the folding at the first folding position P1 that is performed first. Therefore, preferably, the first folding position P1 is embossed or the like at a position sandwiched with the locking member 27 with respect to the longitudinal direction to form a temporary fixing portion 71, whereby the rear end of the top absorbent body 20 is The end 20b may be pressure-bonded to the packaging sheet 37. In this way, since the first folding position P1 is sandwiched between the locking member 27 and the temporary fixing portion 71, the displacement of the top absorbent body 20 during folding is effectively suppressed.

  In the case where an adhesive is used instead of the mechanical fasteners 63 and 65 for the front end 20a of the top absorbent body 10, a sheet of a material from which the adhesive is easily peeled is used as the packaging sheet 37, or the front end It is preferable to arrange a sheet of a material from which the above-mentioned pressure-sensitive adhesive easily peels in correspondence with the application region of the pressure-sensitive adhesive 20a. In this case as well, the front end portion 20a of the top absorbent body 20 is temporarily joined to the packaging sheet 37 by the adhesive force of the adhesive.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, this invention is not limited to this embodiment, The deformation | transformation as shown below is possible.

  In the above-described embodiment, as the leak-proof wall 46, an L-shaped cross-section structure that is folded only once is illustrated, but a structure that is folded back multiple times may be used. For example, the cross section may be folded twice to form a W-shaped cross section. Thus, if it folds back multiple times, the height of the leak-proof wall 46 can be earned. In the above-described embodiment, the free end of the leak-proof wall 46 is disposed on the outer side in the width direction. However, the present invention is not limited to this. For example, the leak-proof wall 46 may be disposed on the inner side. You may make it a cross-sectional T shape which equips an both ends with an inner side and an outer side.

  In the above-described embodiment, the leak-proof wall 46 is liquid-impermeable, but the present invention is not limited to this. For example, the leak-proof wall 46 having liquid absorbency may be used. In other words, all the configurations in which the elastic member is fixed to the base absorbent body 10 at the front end portion 46a and the rear end portion 46b in the longitudinal direction of the leak-proof wall 46 by using the elastic member 48 such as rubber thread, etc. Included in the range.

  In the above-described embodiment, the elastic member 48 such as rubber thread is exemplified as the member that urges the leakage prevention wall 46 to stand up. However, the leakage prevention wall 46 can be raised independently with respect to the base absorbent body 10. As long as it is a thing, it is not restricted to this. For example, the leak-proof wall 46 may be formed by using a shape-memory fiber made of a resin material having shape-memory ability as a constituent fiber, and the leak-proof wall 46 may be urged by the shape-memory fiber to stand.

  In the above-described embodiment, the fixing portion 47a is a hot-melt adhesive applied in a rectangular shape, but the outer shape and the application form are not limited to this, and a straight line continuous in the longitudinal direction or A spiral curve pattern may be used. Furthermore, although the above-mentioned fixing | fixed part 47a had the length continuous in the longitudinal direction, it is not restricted to this. For example, as shown in FIG. 22, the fixing portion 47a may be set as one point having no length in the longitudinal direction, or may be an aggregate of a plurality of points.

  In the above-described embodiment, the rear end edge 10r of the main joint portion 10 is parallel to the width direction as shown in FIG. 13, that is, the longitudinal position of the rear end of the main joint portion 10g is aligned in the width direction. However, the present invention is not limited to this. For example, as shown in FIG. 23, the position of the rear end of the main joining portion 10g may not be aligned in the width direction.

  In this case, “the end of the joined portion on the other end side” refers to the rear end located at the rear end in the rear end edge 10r of the main joined portion 10g. Therefore, “the end of the other end portion side of the joint portion is located closer to the other end portion side in the longitudinal direction than the fixing portion” in the example of FIG. 23 is the fixing portion 47a. Further, the rear end 10s located at the rearmost position in the rear end edge 10r of the main joint portion 10g is positioned closer to the rear end side. That is, as shown in FIG. 23, even if the rear end 47s of the fixing portion 47a coincides with a part of the rear end edge 10r with respect to the position in the longitudinal direction, the rear end of the fixing portion 47a. When the rear end 10 s located at the rearmost position is located rearward than 47 s, “the other end of the joint portion is closer to the other end portion side in the longitudinal direction than the fixed portion. The end on the part side is located. "

  In the above-described embodiment, the compression groove 15 formed in the base absorbent body 10 is exemplified as the rigid element. However, if the bending rigidity of the base absorbent body 10 as the “main part of the absorbent article” is increased, This is not a limitation. For example, a sheet material, a plate material, a rod material, a wire material, or the like having an appropriate rigidity made of resin, metal, or the like may be provided along the longitudinal direction.

  In the above-described embodiment, the compression groove 15 as the rigid element is formed along the longitudinal direction, but the direction is not limited to this. For example, a plurality of compressed grooves 15 along the width direction may be formed side by side in the longitudinal direction. However, in order to increase the bending rigidity in the longitudinal direction, the compressed groove 15 continuously formed along the longitudinal direction is preferable.

  In the above-described embodiment, as an application pattern of the hot melt adhesive to the main joining portion 10g in the base absorbent body 10, a pattern in which a plurality of straight lines along the longitudinal direction are arranged in the width direction as illustrated in FIG. However, the application pattern is not limited to this. For example, a pattern in which a plurality of spiral curves continuous in the longitudinal direction are arranged in the width direction may be used, or a pattern in which a plurality of straight lines along the width direction are arranged in the longitudinal direction may be used. A pattern in which a plurality of spiral curves are arranged in the longitudinal direction may be used.

  In the above-described embodiment, as illustrated in FIG. 9B, the base absorbent body 10 as the “main part of the absorbent article” is exemplified by the configuration including the absorbent body 12 made of the pulverized pulp laminate 12a and the like. This is not a limitation. For example, it is good also considering what removed the said absorber base material 12 from the structure of the above-mentioned base absorber 10 as a "main part of an absorbent article."

  Although the sanitary napkin is shown as the absorbent article 1 in the above-described embodiment, the present invention is not limited to this as long as it absorbs liquid excreted from the human body.

It is a top view of the surface side of the absorptive article 1 of a deployment state. It is II-II sectional drawing in FIG. 1 is a perspective view of an absorbent article 1. FIG. It is a perspective view of the absorbent article 1 for demonstrating the mode at the time of use. It is the same perspective view. It is the same perspective view. 3 is a plan view of the surface side of the base absorbent body 10. FIG. 3 is a plan view of the surface side of the base absorbent body 10. FIG. It is a top view of the back side. 9A to 9C are an AA sectional view, a BB sectional view, and a CC sectional view, respectively, in FIG. It is a basic-weight distribution map of the pulverized pulp which concerns on the pulverized pulp laminated body 12a. It is a top view of the top absorber 20 of the expansion | deployment state. 12A to 12D are an AA sectional view, a BB sectional view, a CC sectional view, a DD sectional view, and an EE sectional view, respectively, in FIG. It is explanatory drawing of this joining by adhesion | attachment. 3 is a basis weight distribution diagram of pulverized pulp according to a pulverized pulp laminate 22. FIG. FIG. 3 is a plan view of the base absorbent body 10 for explaining a planar position of a base end portion 44 related to a leak-proof wall 46. FIG. 16A thru | or FIG. 16D is explanatory drawing of a mode that the absorbent article 1 is packaged. FIG. 17A thru | or FIG. 17D is a top view which shows a mode that the absorbent article 1 is folded in four. 18A and 18B are schematic views for explaining problems when the absorbent article 1 is mounted. It is a perspective view of the absorbent article 1 which concerns on 2nd Embodiment. 3 is a plan view of the surface side of the base absorbent body 10. FIG. 3 is a plan view of the top absorbent body 20 on the surface side. FIG. It is explanatory drawing of other embodiment. It is explanatory drawing of other embodiment.

Explanation of symbols

1 absorbent article, 10 base absorbent body (main body part),
10a front end (one end), 10b rear end, 10e rear end edge,
10g main joint part (joint part), 10r rear end edge (end on the other end part side in the joint part),
10s rear end (end on the other end side in the joint portion), 10k joint portion,
12 absorbent substrate, 12a pulverized pulp laminate, 14 surface sheet,
15 compression groove (rigid element), 15a low compression part, 15b high compression part,
20 top absorber (absorber), 20a front end (one end),
20b rear end (other end), 22 pulverized pulp laminate (liquid absorbing member),
23 intermediate sheet, 24 shape-retaining sheet, 24c part, 24d part,
24e end part, 25 front side sealing part, 26 rear side sealing part, 26a knob part,
27 locking member, 28 holes, 30 back sheet, 30a front end, 30b rear end,
30c Back side, 31 Adhering part for attachment (adhering part), 32 Wing part,
33 Adhering part for slip prevention, 34 Protection sheet, 35 Protection sheet,
36 packaging sheet, 36c outer edge, 37 packaging sheet, 38 lead tape,
40 side seat, 44 base end, 46 end (leak barrier), 46a front end,
46b rear end, 47a fixed part, 47b fixed part, 47s rear end,
48 elastic member, 51 leak-proof sheet, 63 male material of mechanical fastener,
65 female material for mechanical fasteners, 71 temporary fixing part, 90 underwear,
CL center line, Z vaginal opening facing position, Pk pocket,
Ra front region, Rb rear region, Rc central region

Claims (7)

A main body of the absorbent article;
An absorbent body that has a liquid absorbing member that absorbs liquid and is overlapped with each other in the longitudinal direction on the main body portion, and at least one end portion of the main body portion in the longitudinal direction by a joint portion. Is bonded to the other end portion side of the one end portion, and an absorber having a portion that is not bonded to the main body portion, and
A leak-proof wall urged so as to stand up from a surface on which the absorber in the main body is superimposed, and is positioned at both ends in the width direction intersecting the longitudinal direction, along the longitudinal direction. Provided with a leakage barrier,
The leak-proof wall is overlapped with the main body portion and fixed at the fixing portion on the one end portion side in the longitudinal direction,
The absorbent article according to claim 1, wherein an end of the joint portion on the other end portion side is located closer to the other end portion side in the longitudinal direction than the fixing portion. The absorbent article according to claim 1,
The elastic member in which the tensile force in the longitudinal direction is generated is fixed to the leak-proof wall along the longitudinal direction, and the elastic member reaches at least the position reaching the fixing portion in the longitudinal direction. It is provided over,
An absorbent article, wherein the leakage preventing wall is urged to stand by contraction of the elastic member. The absorbent article according to claim 1 or 2,
An attachment portion for attaching the main body portion to underwear is provided on the surface of the main body portion opposite to the surface on which the absorber is superimposed,
The said adhering part is provided in the said other end part side of the said longitudinal direction in the said fixing | fixed part across the said longitudinal direction, The absorbent article characterized by the above-mentioned. The absorbent article according to any one of claims 1 to 3,
An absorptivity characterized in that a rigid element for increasing the rigidity of the main body portion is provided continuously across the longitudinal direction at the other end side end in the longitudinal direction of the fixed portion. Goods. The absorbent article according to claim 4,
The absorbent article, wherein the rigid element is a compressed groove formed by compressing the main body portion in a direction in which the absorbent body overlaps the main body portion. An absorbent article according to any one of claims 1 to 5,
The other end of the absorber is movable separately from the body as a free end with the one end joined to the body as a fulcrum,
When the absorbent article is mounted on a human body, the absorbent article is pulled upward with the other end portion as a point of action of force. The absorbent article according to any one of claims 1 to 6,
In the bonded portion, the absorbent article is detachably bonded to the main body portion.