JP5651743B1 - Absorbent articles - Google Patents

Abstract

An object of the present invention is to suppress misalignment in the thickness direction between portions located on both sides in the width direction of a small basis weight portion of an absorbent body, and improve fit between the portions in the crotch. The absorbent article has a thickness direction, a width direction, and a longitudinal direction, and absorbs urine. A first absorber including a liquid absorbent material that absorbs urine; a second absorber including a liquid absorbent material that is provided on the non-skin side in the thickness direction of the first absorber and absorbs urine; Have. The first absorbent body has a small basis weight portion in which the basis weight (g / m 2) of the liquid absorbent material is smaller than the portion around the center portion at the center portion in both the longitudinal direction and the width direction. . The second absorbent body is joined to the first absorbent body with the small basis weight portion covered from the non-skin side. [Selection] Figure 6

Description

  The present invention relates to an absorbent article that is worn by a wearer and absorbs urine.

  Conventionally, disposable diapers have been used as absorbent articles that absorb urine. Patent Document 1 discloses an example of the diaper 101. FIG. 1A is a schematic plan view of the diaper 101, and FIG. 1B is a cross-sectional view taken along line BB in FIG. 1A. The outer shape of the diaper 101 has a substantially hourglass shape. That is, when the three directions orthogonal to each other are the longitudinal direction, the width direction, and the thickness direction, the outer shape of the diaper 101 is a shape in which the central portion 101m in the longitudinal direction is constricted in the width direction. Further, the diaper 101 includes an absorbent body 110 containing a liquid absorbent material such as pulp fiber to absorb urine, a liquid-permeable surface sheet 130 that covers the absorbent body 110 from the skin side in the thickness direction, and the same. A liquid-impermeable back sheet 140 that covers the absorber 110 from the non-skin side in the thickness direction. Furthermore, a through-hole 110h that penetrates the absorber 110 in the thickness direction is provided along the longitudinal direction in the central portion 110c in both the width direction and the longitudinal direction of the absorber 110.

  When the wearer wears the diaper 101, the longitudinal center portion 101m of the diaper 101 comes into contact with the wearer's crotch. In this case, the center portion 101m is viewed from both sides in the width direction. A wearer's crotch force F is applied. Then, due to the action of the crotch force F, the portions 110cs, 110cs located on both sides of the through hole 110h in the absorber 110 approach each other in the width direction so as to crush the through hole 110h in the width direction. Thus, as shown in FIG. 1C, the central portion 101m of the diaper 101 is reduced in the width direction to a size corresponding to the crotch. And it is supposed that the dimension of the center part 101m of the center part 101m is adjusted to the dimension of the crotch width direction by this, and the fitting property of the center part 101m of the diaper 101 with respect to a crotch becomes favorable.

Patent No. 4099306

  However, the portion 101h of the through-hole 110h in the diaper 101 is a portion where there is no liquid absorbent material such as pulp fiber related to the absorbent body 110 as shown in FIGS. 1A and 1B. That is, only the top sheet 130 and the back sheet 140 are present, and thus the rigidity of the portion 101h of the through hole 110h is very small.

  Therefore, when the crotch tightening force F is applied, the portions 110cs and 110cs located on both sides of the through hole 110h of the absorbent body 101 approach each other in the width direction so as to crush the hole 110h in the width direction. In addition, as shown in FIG. 2A, the portions 110cs and 110cs may be displaced in the thickness direction. When the position is shifted as described above, a step D is generated between the portions 110cs and 110cs as shown in FIG. 2A, and further, as shown in FIG. 2B, the steps 110cs and 110cs are out of the portions 110cs and 110cs. One portion 110cs of the diaper rides on the other portion 110cs, and as a result, the fit of the central portion 101m of the diaper 101 with respect to the crotch becomes worse.

  In addition, the above-described dimension adjusting action of the diaper 101 due to the crushing of the through hole 110h and the problem of positional displacement between the parts 110cs, 110cs that may occur when crushing are not necessarily limited to the through hole 110h. This may occur even when a small basis weight portion having a basis weight smaller than the surrounding portion is formed in the central portion 110c of the absorbent body 110 in place of the through hole 110h.

  This invention is made | formed in view of the above conventional problems, Comprising: The objective is the thickness direction between each part located in the both sides of the width direction of a small basic weight part among absorbers. Is to improve the fit of each part to the crotch.

The main invention for achieving the above object is:
An absorbent article having a thickness direction, a width direction, and a longitudinal direction and absorbing urine,
A first absorber comprising a liquid absorbent material that absorbs urine;
A second absorbent comprising a liquid absorbent material that is provided on the non-skin side in the thickness direction from the first absorbent and absorbs urine;
A surface sheet joined to the first absorbent body while covering the first absorbent body from the skin side in the thickness direction ;
The first absorbent body has a small basis weight portion in which a basis weight (g / m ² ) of the liquid absorbent material is smaller than a portion around the center portion at a center portion in both the longitudinal direction and the width direction. Have
The second absorbent body is joined to the first absorbent body in a state of covering the small basis weight portion from the non-skin side ,
The first absorbent body has a first absorbent core formed by laminating the liquid absorbent material,
The small basis weight portion has a through-hole formed through the first absorbent core in the thickness direction in the central portion of the first absorbent body.
The second absorbent body has a second absorbent core formed by laminating the liquid absorbent material.
The first absorbent body has a first liquid-permeable sheet that covers the first absorbent core,
The second absorbent body has a second liquid-permeable sheet that covers the second absorbent core,
The first absorbent core and the first liquid permeable sheet are joined by an adhesive,
The second absorbent core and the second liquid permeable sheet are joined by an adhesive,
An adhesive is provided on a portion of the first liquid permeable sheet facing the through hole,
The first liquid permeability located on the non-skin side of the first absorbent core in a state where the facing portion provided with the adhesive is pushed into the non-skin side along the penetration direction of the through hole. It is joined to the part of the sheet,
The top sheet is joined to the first liquid-permeable sheet in a state where the top sheet is pushed into the non-skin side along the penetration direction of the through-hole,
In each portion of the first absorbent body located on both sides of the through hole in the width direction, both the first absorbent body and the second absorbent body are joined together on the skin side in the thickness direction. Squeezed from the squeezed part is formed along the longitudinal direction,
The pressing part is an adhesive that joins the skin side surface of the first absorbent core and the first liquid permeable sheet, and an adhesive that joins the non-skin side surface of the first absorbent core and the first liquid permeable sheet. An adhesive for bonding the first absorbent body and the second absorbent body, and an adhesive for bonding the skin side surface of the second absorbent core and the second liquid-permeable sheet to the first absorbent. The absorbent article is compressed together with the body and the second absorbent body .
Other features of the present invention will become apparent from the description of the present specification and the accompanying drawings.

  According to the present invention, in the absorbent body, the displacement in the thickness direction between the portions located on both sides in the width direction of the small basis weight portion is suppressed, and the fitting property of each portion to the crotch is improved. be able to.

1A is a schematic plan view of a diaper 101 disclosed in Patent Document 1, FIG. 1B is a cross-sectional view taken along line BB in FIG. 1A, and FIG. It is BB sectional drawing in the inside. 2A and 2B are cross-sectional views taken along the line BB in FIG. 1A for explaining the problem of the diaper 101. FIG. 3A is a schematic plan view showing the pants-type disposable diaper 101 separated by a connecting portion between the front body 101a and the back body 101b and developed on a plane, and FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A. It is. FIG. 3 is a schematic perspective view showing how the urine collecting pad 1 is replaced. It is the general | schematic top view which developed the urine picking pad 1 of 1st Embodiment on the plane, and was seen from the skin side. 6A is a cross-sectional view taken along line AA and CC in FIG. 5, and FIG. 6B is a cross-sectional view taken along line BB in FIG. 5. It is the schematic plan view which looked at the urine picking pad 1 from the non-skin side. FIG. 8A is a schematic plan view of the absorbent body 10 having a two-layer structure as viewed from the skin side in the thickness direction, FIG. 8B is a cross-sectional view taken along the line BB in FIG. 8A, and FIG. It is CC sectional drawing in 8A. It is a schematic plan view of the urine collection pad 1 of 2nd Embodiment. 10A is a cross-sectional view taken along line AA and CC in FIG. 9, and FIG. 10B is a cross-sectional view taken along line BB in FIG. 9.

At least the following matters will become apparent from the description of the present specification and the accompanying drawings.
An absorbent article having a thickness direction, a width direction, and a longitudinal direction and absorbing urine,
A first absorber comprising a liquid absorbent material that absorbs urine;
A second absorber including a liquid absorbent material that is provided on the non-skin side in the thickness direction than the first absorber and absorbs urine;
The first absorbent body has a small basis weight portion in which the basis weight (g / m ² ) of the liquid absorbent material is smaller than the portion around the center portion at the center portion in both the longitudinal direction and the width direction. Have
The said 2nd absorber is joined to the said 1st absorber in the state which covered the said small basic weight part from the said non-skin side, It is an absorbent article characterized by the above-mentioned.

  According to such an absorbent article, the 2nd absorber is joined to the 1st absorber in the state which covered the small basic weight part of the 1st absorber from the non-skin side. Therefore, in each part located in the both sides of the width direction of a small basic weight part among the 1st absorbers, the free movement of the thickness direction is regulated by the 2nd absorber. Therefore, even when the parts of the first absorbent body approach each other so as to crush the small basis weight part from the width direction due to the action of the crotch tightening force, the parts are displaced in the thickness direction. This is effectively prevented. And thereby, the fitting property to the crotch of the said part can be improved.

Such an absorbent article,
It is desirable that the first absorbent body and the second absorbent body are joined at least at each portion located on both sides in the width direction of the small basis weight portion of the first absorbent body.

  According to such an absorbent article, the 1st absorber and the 2nd absorber are joined in each part located in the both sides of the width direction of a small basic weight part among the 1st absorbers at least. Therefore, the position shift of the thickness direction of each said part can be prevented reliably by the 2nd absorber.

Such an absorbent article,
The first absorbent body has a first absorbent core formed by laminating the liquid absorbent material,
It is preferable that the small basis weight portion has a through-hole formed through the first absorbent core in the thickness direction.

  According to such an absorbent article, the small basis weight portion has a through hole. Therefore, when the small basis weight portion of the first absorbent body is crushed in the width direction by the action of the crotch tightening force, the respective portions located on both sides in the width direction of the small basis weight portion are each subjected to a large resistance from the small basis weight portion. It is possible to move quickly and smoothly to the center side in the width direction. Therefore, the positional shift in the thickness direction between the portions that can occur during the movement can be effectively suppressed.

Such an absorbent article,
The first absorbent body has a first absorbent core formed by laminating the liquid absorbent material,
The second absorbent body has a second absorbent core formed by laminating the liquid absorbent material,
The shape of the first absorbent core viewed from the thickness direction is a shape in which a central portion in the longitudinal direction is constricted in the width direction,
It is desirable that the widthwise dimension of the longitudinal end of the second absorbent core is smaller than the widthwise dimension of the first absorbent core at the same position in the longitudinal direction.

According to such an absorbent article, the dimension in the width direction of the end portion of the second absorbent core is reduced. Thus, the small basis weight portion of the first absorbent body can be smoothly and quickly crushed in the width direction by the crotch tightening force. Details are as follows.
First, when the dimension in the width direction of the longitudinal end portion of the second absorbent core is large, a large resistance to deformation acts on the first absorbent body from the end portion. That is, when the small basis weight portion of the first absorbent body is crushed in the width direction by the crotch tightening force, a large tensile resistance force that impedes this is applied from the end portion of the second absorbent core. However, about this point, according to this absorbent article, the dimension in the width direction of the end of the second absorbent core is reduced. Accordingly, the resistance force is reduced, and as a result, the small basis weight portion can be smoothly and quickly crushed in the width direction based on the crotch tightening force.

Such an absorbent article,
The first absorbent body has a first absorbent core formed by laminating the liquid absorbent material,
The second absorbent body has a second absorbent core formed by laminating the liquid absorbent material,
The shape of the first absorbent core viewed from the thickness direction is a shape in which a central portion in the longitudinal direction is constricted in the width direction,
When the dimension in the width direction is compared at the same position in the longitudinal direction, the dimension in the width direction of the second absorbent core is provided with the small basis weight portion in the first absorbent core. Smaller than or equal to the dimension in the width direction of the portion,
It is desirable that the dimension in the width direction of the small basis weight portion is smaller than the dimension in the width direction of the second absorbent core at the same position in the longitudinal direction.

According to such an absorbent article, since it is in the former dimensional relationship, the second absorbent core does not protrude on both sides in the width direction at the central portion in the longitudinal direction. Can be. Therefore, it is possible to effectively prevent each end of the second absorbent core in the width direction from coming into contact with the base of the leg located near the wearer's crotch and causing the wearer to feel uncomfortable.
Moreover, since it is set as the latter dimensional relationship, a 2nd absorber can be reliably spanned to each part located in the both sides of the width direction of a small basic weight part among 1st absorbers. Therefore, it is possible to reliably suppress the positional deviation in the thickness direction between the above portions.

Such an absorbent article,
The shape of the second absorbent core viewed from the thickness direction is preferably a rectangle.

  According to such an absorbent article, since the shape of the 2nd absorptive core is a very simple shape, it becomes easy to form the 2nd absorptive core.

Such an absorbent article,
The first absorbent body has a first absorbent core formed by laminating the liquid absorbent material,
In the portions other than the respective end portions in the longitudinal direction among the small basis weight portions, the ratio of the dimension in the width direction of the small basis weight portion to the dimension in the width direction of the first absorbent core is 30% to 50%. % Range,
The shape of the small basis weight portion viewed from the thickness direction is preferably a vertically long shape in which the dimension in the longitudinal direction is larger than the dimension in the width direction.

According to such an absorbent article, since the above ratio is set in a range of 30% to 50%, the size in the width direction can be reliably reduced by the crotch force, and the through hole A sufficiently large urine absorbable capacity can be secured for each of the above portions located on both sides in the width direction.
Moreover, since the dimension in the longitudinal direction of the small basis weight portion is larger than the dimension in the width direction, the above-described effect of reducing the dimension in the width direction can be reliably achieved over a predetermined range in the longitudinal direction.

Such an absorbent article,
It is desirable that the first absorbent body and the second absorbent body are joined by an adhesive.

  According to such an absorbent article, since it is joined with an adhesive, the first absorbent body and the second absorbent body are reliably joined with high joint strength. And thereby, the position shift of the thickness direction of each part located in the both sides of the width direction of a small basic weight part among 1st absorbers can be prevented reliably by a 2nd absorber.

Such an absorbent article,
The first absorbent body has a first liquid-permeable sheet that covers the first absorbent core,
The second absorbent body has a second absorbent core formed by laminating the liquid absorbent material, and a second liquid permeable sheet that covers the second absorbent core,
The first absorbent core and the first liquid permeable sheet are joined by an adhesive,
The second absorbent core and the second liquid permeable sheet are joined by an adhesive,
It is desirable that the first liquid permeable sheet and the second liquid permeable sheet adjacent to each other in the thickness direction are bonded with an adhesive.

According to such an absorbent article, the first absorbent core that forms the main part of the first absorbent body and the first liquid-permeable sheet that covers the core are joined by the adhesive, and the second absorbent The second absorbent core that forms the main part of the body and the second liquid permeable sheet that covers the core are joined with an adhesive, and the first liquid permeable sheet and the second liquid permeable sheet are bonded together. It is joined with the agent. Therefore, the position shift of the thickness direction of each part located in the width direction both sides of a small basic weight part among 1st absorbers can be prevented reliably.
The first absorbent core is covered with a first liquid permeable sheet, and the second absorbent core is covered with a first liquid permeable sheet. Therefore, it is possible to effectively prevent the liquid absorbent material laminated to form the first absorbent core and the second absorbent core from collapsing. And thereby, the 1st and 2nd absorptive core becomes easy to be maintained by the design shape of each, respectively, and this also fits to the crotch of the above-mentioned each part located in the both sides of a small basic weight part. Contributes effectively to improvement.

Such an absorbent article,
In each portion of the first absorbent body located on both sides in the width direction of the small basis weight portion, both the first absorbent body and the second absorbent body are bonded together in the skin in the thickness direction. It is desirable that the pressing part formed by pressing from the side is formed along the longitudinal direction.

According to such an absorbent article, said pressing part is each formed along the longitudinal direction in each part located in the both sides of the width direction of a small basic weight part among 1st absorbers. And when this compression part bends in the width direction, the center part of the longitudinal direction of an absorbent article becomes the starting point of the bending. Therefore, when the crotch force acts on the center part, the center part can be bent at the position of the compressed part as the small basis weight part is crushed in the width direction, so the width direction of the center part The dimension of is adjusted to the dimension in the width direction of the crotch more quickly and smoothly. Moreover, by bending at the position of the compressed part, it can be effectively prevented from being bent unexpectedly at places other than the compressed part, and as a result, the shape of the central part of the absorbent article becomes an unexpected shape. Can be prevented.
Moreover, since said pressing part is formed along the longitudinal direction, the bending rigidity of the longitudinal direction of an absorbent article is moderately improved. Therefore, the shape of the absorbent article can be maintained in a state in which the absorbent article is moderately stretched in the longitudinal direction, and thereby, when the absorbent article is worn on the wearer, or the absorbent article is attached to another absorbent article. It becomes easier to handle.

Such an absorbent article,
A sheet-like member fixed to the absorber while covering the first absorber or the second absorber from the thickness direction;
It is desirable to have an elastic member fixed to the sheet-like member in a state of being stretched in the longitudinal direction.

  According to such an absorbent article, in an unloaded state where no external force is applied, the absorbent article is curved so that the thickness direction is the curvature radius direction based on the contraction force of the elastic member. Therefore, it becomes possible to attach to the lower body of the wearer with high fit.

Such an absorbent article,
As the sheet member, it has a first sheet member and a second sheet member,
As the elastic member, it has a first elastic member fixed to the first sheet-like member, and a second elastic member fixed to the second sheet-like member,
Having a surface sheet joined to the first absorbent body while covering the first absorbent body from the skin side in the thickness direction;
The first sheet-like member is provided side by side in the width direction so as to form a leak-proof wall portion at each end in the width direction, and the top sheet is formed from the skin side in the thickness direction. Bonded to the top sheet while covering,
When the first elastic member of the first sheet-shaped member contracts, the first sheet-shaped member is moved in the longitudinal direction based on a contracting force applied from the first elastic member to the first sheet-shaped member. By shrinking, it stands up from the top sheet and becomes the leakage barrier part,
The first absorbent body has a first absorbent core formed by laminating the liquid absorbent material, and a first liquid-permeable sheet that covers the first absorbent core,
The shape of the first absorbent core viewed from the thickness direction is a shape in which a central portion in the longitudinal direction is constricted in the width direction,
The second elastic member of the second sheet-like member is preferably disposed at a position spaced apart from the central portion in the longitudinal direction of the first absorbent core by a predetermined interval in the width direction.

According to such an absorbent article, not only the shrinkage force of the first elastic member provided for the purpose of raising the leakproof wall portion but also the contraction force of the second elastic member acts on the leakproof wall portion, Contributes to the standing of the leak-proof wall. Therefore, the leak-proof wall portion is easy to stand up as a whole.
Moreover, since the center part of the longitudinal direction of the 1st absorptive core is bundled in the width direction, in the said center part, the contraction force of a 2nd elastic member can be received only a little. For this reason, a large contractive force acts on the leak-proof wall portion in the central portion, and thereby, the leak-proof wall portion is in a particularly upright state in the central portion. Here, the central portion corresponds to the wearer's crotch. Therefore, urine leakage from the crotch can be effectively prevented by the leakage preventing wall portion.
Furthermore, the center part of the 1st absorptive core is bundled in the width direction, and the 2nd elastic member is arrange | positioned in the position spaced apart from this bundled part to the edge side of the width direction by predetermined spacing. Such a position corresponds to a position around the wearer's leg. Therefore, the second sheet-like member can be caused to function as a so-called leg circumference gather by contracting the second sheet-like member by the contraction force of the second elastic member.

=== First Embodiment ===
The absorbent article according to the first embodiment is a urine absorption pad 1. The urine collecting pad 1 is used by being attached to a pants-type disposable diaper 101, for example.
FIG. 3A is a schematic plan view showing the pants-type disposable diaper 101 separated by a connecting portion between the front body 101a and the back body 101b and developed on a plane, and FIG. 3B is a cross-sectional view taken along line BB in FIG. 3A. It is.
3A and 3B, the diaper 101 includes an absorbent body 110 containing a liquid absorbent material such as pulp fiber, and a liquid-permeable surface sheet 130 that covers the absorbent body 110 from the skin side in the thickness direction. And a liquid-impermeable back sheet 140 that covers the absorbent body 110 from the non-skin side. In addition, the developed shape of the diaper 101 has a substantially hourglass shape having a longitudinal direction, a width direction, and a thickness direction, as shown in FIG. 3A. That is, the central part 101m in the longitudinal direction is shaped in the width direction. Here, the constricted portion 101m is a crotch lower portion 101m applied to the wearer's crotch, and a front portion 101a of the abdomen in the longitudinal direction from the crotch lower portion 101m is applied to the lower abdomen of the wearer. 101a, and a back part 101b in the longitudinal direction from the crotch part 101m is a back body 101b applied to the wearer's buttocks. Then, in a state where the unfolded diaper 101 is folded in half at the longitudinal center position CL101, the widthwise end portions 101ae2 and 101ae2 of the front body 101a and the widthwise end portions 101be2 of the back body 101b. 101be2 is connected to each other by welding, adhesion, or the like, so that one waistline opening and two leghole openings are formed to form a pants-type disposable diaper 101. And the said diaper 101 wears like a pants and is mounted | worn with a wearer.

FIG. 4 is a schematic perspective view showing how the urine collecting pad 1 is replaced. The replacement of the pad 1 is performed, for example, in a state where the wearer is standing or in a state where the wearer is sitting on a chair or the like as shown in FIG. That is, in a state where the diaper 101 is lowered, first, a used urine removing pad (not shown) attached on the skin side surface of the top sheet 130 of the diaper 101 is removed from the diaper 101. Then, a newly prepared urine absorbing pad 1 prepared in advance is attached to the diaper 101. Here, the new urine absorbing pad 1 is normally set to a center position CL1 in the longitudinal direction as shown in FIG. It is folded. Therefore, when attaching to the diaper 101, first, the urine removing pad 1 is put into the diaper 101 so that the folding position CL1 is at the head, and the folding sheet CL1 is placed on the top sheet 130 of the diaper 101. Lightly press against the skin side. Next, the urine collecting pad 1 in a folded state is opened on both sides in the longitudinal direction, whereby the pad 1 is developed in a planar shape, and the urine collecting pad 1 in the developed state is then formed on the top sheet 130 of the diaper 101. Fix to the skin side so that it cannot move relative to the skin. Such fixing is performed, for example, by engaging male members 61 and 61 (FIG. 7) of hook-and-loop fasteners provided in advance on the non-skin side surface of the urine removing pad 1 with the top sheet 130 of the diaper 101. And if the diaper 101 is pulled up to the position of the wearer's waist, the replacement of the urine collecting pad 1 is completed. FIG. 5 is a schematic plan view of the urine collecting pad 1 developed on a plane and viewed from the skin side. 6A is a cross-sectional view taken along line AA and CC in FIG. 5, and FIG. 6B is a cross-sectional view taken along line BB in FIG. 5. FIG. 7 is a schematic plan view of the urine collecting pad 1 as seen from the non-skin side.

As shown in FIG. 5, the urine absorption pad 1 has a longitudinal direction, a width direction, and a thickness direction as three directions orthogonal to each other. And the planar shape prescribed | regulated by the longitudinal direction and the width direction of the urine picking pad 1 has comprised the substantially rectangular shape as an example of vertically long shape. However, the present invention is not limited to this, and may have, for example, a substantially hourglass shape.
In the following, with respect to the thickness direction, the side in contact with the human body is also referred to as “skin side”, and the side in contact with the diaper 101 is also referred to as “non-skin side”. The longitudinal direction is also referred to as “front-rear direction”, and the width direction is also referred to as “left-right direction”. At the time of mounting on the human body, the front side of the urine collecting pad 1 in the longitudinal direction faces the ventral side of the human body, and the rear side faces the back side of the human body. Moreover, the dimension of the longitudinal direction of the urine picking pad 1 is longer than the dimension of the width direction, and the dimension of the width direction is longer than the dimension of the thickness direction.

<<< Basic configuration of urine removing pad 1 >>>
As shown in FIGS. 5, 6B, and 7, the urine absorbing pad 1 includes an absorbent body 10 that includes a liquid absorbent material that absorbs urine, and liquid permeability that covers the absorbent body 10 from the skin side in the thickness direction. The top sheet 30, the liquid-impermeable back sheet 40 that covers the absorbent body 10 from the non-skin side, and the leak-proof wall sections 52, 52 are formed at the respective widthwise ends 30 e 2, 30 e 2 of the top sheet 30. Side sheets 50 and 50.

  As the absorber 10, one having an upper and lower two-layer structure in the thickness direction is used. That is, it has the 1st absorber 11 provided in the skin side of the thickness direction, and the 2nd absorber 21 provided adjacent to the non-skin side of the thickness direction rather than the 1st absorber 11. . The absorber 10 having the two-layer structure will be described later.

  The top sheet 30 receives urine excreted from the human body, promptly sucks it in the thickness direction, and guides it to the absorber 10. 5 and 6B, for example, a planar sheet that can cover most of the skin side surface of the absorbent body 10 is used. In the example of FIG. 5, a substantially rectangular sheet is used. For example, a nonwoven fabric such as an air-through nonwoven fabric or a spunbond nonwoven fabric is used as the material of the surface sheet 30, and a thermoplastic resin fiber such as polyethylene or polyethylene terephthalate is used as a constituent fiber of the nonwoven fabric. However, a sheet made of a material other than this may be used as long as it has liquid permeability and flexibility to some extent.

  The back sheet 40 is a leak-proof sheet 40 that prevents urine leakage from the non-skin side of the urine removing pad 1. And as shown in FIG.7 and FIG.6B, the planar shape of the sheet | seat 40 is a substantially rectangular shape larger than the absorber 10, for example. That is, the outer peripheral edge of the sheet 40 protrudes outward from the absorber 10 over the entire circumference. Then, as shown in FIG. 6B, in a state where the absorber 10 is placed on the back sheet 40, the respective edge portions 40ee2 and 40ee2 in the width direction of the sheet 40 wrap around the skin side in the thickness direction. Thus, the end edge portions 40ee2 and 40ee2 of the sheet 40 cover the end edge portions 30ee2 and 30ee2 in the width direction of the topsheet 30 from the skin side. As a material of the back sheet 40, for example, a resin film such as a polyethylene film can be exemplified, but a sheet made of a material other than this may be used as long as it has liquid impermeability and flexibility.

  As described above with reference to FIG. 6B, the side sheet 50 (corresponding to the first sheet-like member) has the leakage preventing wall portions 52 and 52 formed at the end portions 30e2 and 30e2 in the width direction of the topsheet 30, respectively. It is a sheet to do. The leakage preventing wall 52 prevents urine leakage from the width direction of the urine collecting pad 1. As shown in FIGS. 5 and 6B, the side sheet 50 has these end portions 30e2 and 40e2 so as to straddle both the end portion 30e2 in the width direction of the topsheet 30 and the end portion 40e2 in the width direction of the backsheet 40. Are bonded and fixed to the top sheet 30 and the back sheet 40 with adhesives A35 and A45, respectively, at the positions of the end portions 30e2 and 40e2. In addition, a portion 50 b of the side sheet 50 that is fixed to the end portion 30 e 2 of the topsheet 30 is a base portion 50 b of the leak-proof wall portion 52. That is, a portion of the side sheet 50 that is closer to the center in the width direction than the base portion 50b is 50f, a free end portion 50f that can stand up from the topsheet 30, and the free end portion 50f has a longitudinal direction. Along the first elastic member 55 such as rubber thread, the first elastic member 55 is fixed by an adhesive in an extended state.

  Therefore, due to the contraction of the first elastic member 55 in the longitudinal direction, the urine collection pad 1 is curved in the longitudinal direction so that the surface sheet 30 side becomes the inner peripheral side as a whole. The free end portion 50 f is contracted in the longitudinal direction by the contraction force applied from the first elastic member 55 and stands up from the top sheet 30, whereby the free end portion 50 f functions as the leak-proof wall portion 52.

As shown in FIG. 5 and FIG. 6A, the front end portion 50fa and the rear end portion 50fb in the longitudinal direction of the free end portion 50f are faced down on the top sheet 30 with the adhesive A50f. The front end portion 50fa and the rear end portion 50fb are non-stand-up portions that do not stand up. Therefore, the contraction force of the first elastic member 55 is selectively given only to the intermediate portion 50fm existing between the front end portion 50fa and the rear end portion 50fb of the free end portion 50f in FIG. The intermediate portion 50fm contracts and rises as a leak-proof wall portion 52.
Examples of the material of the side sheet 50 include an SMS nonwoven fabric subjected to water repellent treatment. However, the present invention is not limited to this, and sheets of materials other than this may be used as long as they have some flexibility.

<<< About the absorber 10 having a two-layer structure >>>
As shown in FIGS. 5 to 7, the urine collecting pad 1 has an absorbent body 10 having a two-layer structure. That is, the said absorber 10 has the 1st absorber 11 containing liquid absorbent materials, such as a pulp fiber, and the 2nd absorber 21 which also contains liquid absorbent materials, such as a pulp fiber. And as shown in FIG.5 and FIG.6B, the basic weight (g / m < ² >) of the liquid absorptive material is more than the surrounding part in the center part 11c in both the longitudinal direction and the width direction of the 1st absorber 11. FIG. A small basis weight portion 11h is formed along the longitudinal direction. In this example, the small basis weight portion 11h is a portion having a zero basis weight, that is, a space. Further, the second absorbent body 21 is overlaid on the first absorbent body 11 and joined with the adhesive A12 in a state where the small basis weight portion 11h is covered from the non-skin side in the thickness direction (FIG. 6B). ).

  Therefore, as shown in FIG. 5, when the wearer's crotch force is applied from both sides in the width direction to the longitudinal center portion 1 c of the urine absorbing pad 1, In the first absorbent body 11, the portions 11cs and 11cs located on both sides of the small basis weight portion 11h approach each other in the width direction so as to crush the small basis weight portion 11h in the width direction. And thereby, the said center part 1c of the urine picking pad 1 is reduced in the width direction to the dimension corresponding to a wearer's crotch. As a result, the dimension in the width direction of the central part 1c is substantially adjusted to the dimension in the width direction between the crotch, and the fit of the central part 1c of the pad 1 to the crotch becomes good.

Moreover, as shown in FIGS. 5 to 7, the second absorbent body 21 is joined to the first absorbent body 11 so as to cover the small basis weight portion 11h from the non-skin side. Therefore, as shown to FIG. 6B, the 2nd absorber 21 is distribute | arranged so that the small basic weight part 11h may be straddled in the width direction, and, thereby, the said 2nd absorber 21 is the 1st absorber 11 Among these, the portions 11cs and 11cs located on both sides in the width direction of the small basis weight portion 11h are integrally joined to the portions 11cs and 11cs.
Therefore, in the first absorbent body 11, the free movement in the thickness direction of each of the portions 11 cs and 11 cs located on both sides in the width direction of the small basis weight portion 11 h is restricted by the second absorbent body 21. Therefore, when the crotch tightening force F is applied, the portions 11cs and 11cs of the first absorbent body 11 come close to each other so as to crush the small basis weight portion 11h from the width direction. It is effectively prevented that they are displaced in the thickness direction. As a result, the portions 11cs and 11cs are maintained in a substantially flat state with no step between each other, and as a result, the above-described crotch fit can be ensured. .

Hereinafter, the 1st absorber 11 and the 2nd absorber 21 which concern on the absorber 10 of a two-layer structure are demonstrated in detail.
FIG. 8A is a schematic plan view of the absorbent body 10 having a two-layer structure as viewed from the skin side in the thickness direction, FIG. 8B is a cross-sectional view taken along the line BB in FIG. 8A, and FIG. It is CC sectional drawing in 8A.

  The 1st absorber 11 makes the main body the 1st absorptive core 13 formed by shape | molding a liquid absorptive material in a predetermined shape. The 1st absorptive core 13 is a liquid absorptive fiber and a liquid absorptive granular material which were mixed by a predetermined compounding ratio as two kinds of liquid absorptive materials, for example. In this example, pulp fiber is used as the liquid absorbent fiber, and a super absorbent polymer (so-called SAP) is used as the liquid absorbent granular material, but the present invention is not limited to this. In addition, the liquid absorbent material may include only one of liquid absorbent fibers and liquid absorbent granular materials, or in addition to the above two types of liquid absorbent material or in place of either of them. Another type of liquid absorbent material may be mixed.

  And as shown to FIG. 8A, the said 1st absorptive core 13 laminates | stacks said liquid absorptive material in the thickness direction so that the shape which looked at the same core 13 from the thickness direction may become a substantially hourglass shape. Is formed. That is, the planar shape of the core 13 is a shape in which the central portion 13c in the longitudinal direction is constricted in the width direction.

  In the substantially hourglass shape, the minimum value in the width direction of the central portion 13c in the longitudinal direction, and the maximum value in the width direction of the wide width portions 13a and 13b located on both sides in the longitudinal direction of the central portion 13c The ratio is set, for example, within a range of 1: 1.5 to 1: 2. In this example, the dimension in the width direction of the central portion 13c is the minimum value at the central position CL1 in the longitudinal direction, but it is not necessarily the central position CL1, that is, from the central position CL1 to the longitudinal direction. It may be slightly off.

  The 1st absorptive core 13 has the above-mentioned small basic weight part 11h in the center part 13c. As described above, in this example, since the basis weight of the small basis weight portion 11h is zero, the small basis weight portion 11h is a through hole 13h penetrating the core 13c in the thickness direction.

  As shown in FIG. 8A, the shape of the through-hole 13h viewed from the thickness direction is a vertically long shape in which the dimension L13h in the longitudinal direction is larger than the dimension W13h in the width direction. Specifically, as an example of the vertically long shape, an elliptical shape along the longitudinal direction is used. More specifically, the end portions 13he1 and 13he1 in the longitudinal direction are arc-shaped, and the portions other than the end portions 13he1 are rectangular.

  In addition, as shown in FIG. 8A, in this example, the front end position 13he1a of the through hole 13h in the longitudinal direction is aligned with the front side constriction start position P13ra of the first absorbent core 13 with respect to the position in the longitudinal direction. Further, the rear end 13 heel 1 b of the through-hole 13 h is aligned with the rear side constriction start position P 13 rb of the core 13. As a result, the through-hole 13h is opposed to the most part of the crotch, so that the reduction in the dimension W13 in the width direction by the crotch tightening force F is performed on the substantially total length of the crotch. As a result, the fit between the groins can be reliably improved. However, it is not limited to this. For example, each position of the front end 13he1a and the rear end 13hee1b of the through hole 13h is within a range of ± 10% of the longitudinal dimension L13h of the through hole 13h, and more preferably within a range of ± 5%. It may be shifted in the longitudinal direction from the start positions P13ra and P13rb. And even if it becomes like this, there can exist an effect substantially equivalent to the above-mentioned.

  The dimension L13h in the longitudinal direction of the through-hole 13h is set, for example, in the range of 150 mm to 250 mm, and preferably in the range of 140 mm to 220 mm. Further, the width direction dimension W13h of the through-hole 13h is set, for example, in the range of 30 mm to 60 mm over the entire length excluding the end portions 13he1 and 13he1 in the longitudinal direction, and preferably in the range of 40 mm to 50 mm. It should be set.

  Further, in this example, when the dimensions in the width direction are compared at the same position in the longitudinal direction, the first absorptivity is provided in the through holes 13h other than the arc-shaped end portions 13he1 and 13he1. The ratio R13h (= W13h / W13 × 100%) of the dimension W13h in the width direction of the through hole 13h to the dimension W13 in the width direction of the core 13 is set in the range of 30% to 50%. Therefore, the size W13 in the width direction is reliably reduced by the crotch tightening force F based on the through hole 13h, and the urine absorbable capacity of the portions 11cs and 11cs located on both sides of the through hole 13h is also obtained. It can be secured sufficiently large.

Incidentally, such basis weight of the first absorbent core 13 is set to a basis weight in the range of for example ^{200 (g / m 2) ~400} (g / m 2), preferably 250 ^(g / m 2) ~350 It is set in the range of (g / m ² ).

  As shown in FIG. 8B and FIG. 8C, such a first absorbent core 13 is a tissue paper 15 as an example of a first liquid-permeable sheet in order to suppress the collapse of the core 13 and maintain its outer shape. It is covered by. For example, in this example, the tissue paper 15 is wound in the width direction so as to wrap around the entire outer peripheral surface of the first absorbent core 13, and the joint of the tissue paper 15 is formed on the first absorbent core 13. Located on the non-skin side. However, it is not limited to this. For example, the entire outer peripheral surface of the first absorbent core 13 may be wrapped by winding the tissue paper 15 in the longitudinal direction, or the joint may be located on the skin side surface of the first absorbent core 13. good. Furthermore, the first liquid-permeable sheet 15 used for covering the first absorbent core 13 is not limited to the tissue paper 15. That is, the sheet can be used in place of the tissue paper 15 as long as the sheet has liquid permeability and flexibility to some extent.

Further, the tissue paper 15 and the first absorbent core 13 are joined to each other by adhesives A15a and A15b at least at a part of each other. For example, in this example, the tissue paper 15 is bonded to the skin side surface of the first absorbent core 13 by the adhesive A15a, and is also bonded to the non-skin side surface of the core 13 by the adhesive A15b. Therefore, the first absorbent core 13 can reliably transmit stress between the second absorbent body 21 via the tissue paper 15, and thereby, the above-described misalignment phenomenon (that is, the first misalignment phenomenon). It is possible to effectively suppress the phenomenon in which the portions 11cs and 11cs located on both sides in the width direction of the through-hole 13h (small basis weight portion) in the absorber 11 are displaced in the thickness direction.
Incidentally, from the viewpoint of the transmission of stress between the first absorbent core 13 and the second absorbent body 21, the latter adhesive A15b is more important than the former adhesive A15a. Therefore, if one of the adhesives is selected and provided, it is preferable to select and provide the adhesive A15b between the non-skin side surface of the first absorbent core 13 and the tissue paper 15.

  Further, as shown in FIG. 8C, the adhesives A15a and A15b are preferably provided in the respective portions 13cs and 13cs on both sides in the width direction of the through-hole 13h in the first absorbent core 13, as described above. If it is done, the above-mentioned positional deviation phenomenon can be more reliably suppressed.

  Furthermore, as shown in FIG. 8C, the adhesive A15c is preferably provided also in a portion of the tissue paper 15 that faces the through hole 13h. And if it is made in this way, the said part of the tissue paper 15 located in the non-skin side of the 1st absorptive core 13 in the state pushed in the non-skin side along the penetration direction of the through-hole 13h. It becomes joined to the part. Then, the dent part 11h of the shape of substantially the through-hole 13h is formed in the skin side surface of the 1st absorber 11, Thereby, the urine discharged | emitted from the wearer can be temporarily stored in the said dent part 11h. As a result, the leakage preventing property of the urine collecting pad 1 can be improved as a whole.

  Moreover, in this example, as shown to FIG. 6A and 6B, both the skin side surface of the tissue paper 15 which is the skin side surface of the 1st absorber 11, and the surface sheet 30 are mutually joined by the adhesive agent A30. Therefore, the surface sheet 30 is also dented in the shape of the above-mentioned dent part 11h, and thereby, urine discharged from the wearer can be temporarily stored more reliably. Further, even when the crotch tightening force F is applied, the top sheet 30 is effectively prevented from being separated from the first absorbent body 11 alone, that is, the sheet 30 is the skin of the first absorbent body 11. Behaves integrally with the side. Therefore, if the fitting property of the first absorbent body 11 is high, the fitting property of the topsheet 30 is inevitably high, and thus the accuracy of fitting property can be increased. However, the adhesive A30 is not essential.

  In addition, as a kind of this adhesive A12, A15a, A15b, A15c, A30, A35, A45, A50f, although a hot-melt-type adhesive agent can be illustrated, it is not restricted to this at all. Further, as the application pattern of the adhesives A12, A15a,..., A stripe pattern in which a plurality of linear portions along the longitudinal direction are arranged in the width direction, or a plurality of spiral portions along the longitudinal direction are arranged in the width direction. However, the present invention is not limited to this. And this is the same also about adhesive agent A53 mentioned later.

  The second absorbent body 21 shown in FIGS. 8A to 8C also has a second absorbent core 23 formed by molding the same kind of liquid absorbent material as described above as a main body. And as shown to FIG. 8A, the said 2nd absorptive core 23 laminates | stacks said liquid absorptive material on the thickness direction so that the shape which looked at the same core 23 from the thickness direction may become a rectangular shape. Is formed. That is, the four sides forming the outer shape are each linear, and in other words, the outer contour of the core 23 is parallel to the two long sides 23L, 23L that are linear in parallel to the longitudinal direction and the width direction. It has two straight short sides 23W and 23W.

The basis weight (g / m ² ) of the second absorbent core 23 is set, for example, in the range of 50% to 80% of the basis weight of the first absorbent core 13, and preferably in the range of 60% to 70%. Good to be done. Speaking of specific numerical values, the basis weight of the second absorbent core 23 is set in a range of 100 (g / m ² ) to 300 (g / m ² ), and preferably 150 (g / m ² ) to 250. It is good to set to the range of (g / m < ² >). And if it is set in such a range, the approaching operation of the portions 11cs and 11cs at the positions on both sides of the through hole 13h of the first absorber 11 to be made under the action of the crotch tightening force F will not be greatly hindered. However, the second absorbent body 21 can ensure the rigidity necessary for suppressing the displacement phenomenon related to the first absorbent body 11.

  Here, desirably, when the dimension in the width direction is compared at the same position in the longitudinal direction, the dimension W23 in the width direction of the second absorbent core 23 is the through hole 13h in the first absorbent core 13. Is preferably smaller than or equal to the dimension W13p in the width direction of the portion 13p. For example, in this example, the dimension W23 in the width direction of the second absorbent core 23 is set equal to the minimum value of the dimension W13 in the width direction of the central portion 13c in the longitudinal direction of the first absorbent core 13. . Therefore, in the central portion 13c in the longitudinal direction, the second absorbent core 23 does not protrude on both sides in the width direction than the first absorbent core 13. And thereby, each end part 23e2, 23e2 of the width direction of the 2nd absorptive core 23 shown to FIG. 8C touches the base of the leg located in a wearer's crotch vicinity, etc., and a wearer is uncomfortable. It is possible to effectively prevent learning.

  In addition, the width direction dimension W13h of the through hole 13h shown in FIG. 8A is preferably smaller than the width direction dimension W23 of the second absorbent core 23 at the same position in the longitudinal direction. Therefore, the second absorbent body 21 can be reliably passed over the portions 11cs, 11cs located on both sides of the through-hole 13h in the width direction of the first absorbent body 11, and as a result, the portions 11cs, 11cs are connected to each other. The positional deviation in the thickness direction can be reliably suppressed.

Further, as described above with reference to FIG. 8A, the first absorbent core 13 has a substantially hourglass shape, and the second absorbent core 23 has a rectangular shape. The width direction dimension W23e1 of the end portion 23e1 is smaller than the width direction dimension W13 of the first absorbent core 13 at the same position in the longitudinal direction. Therefore, under the action of the crotch tightening force F, the through hole 13h of the first absorbent core 13 can be crushed smoothly and quickly in the width direction. Details are as follows.
First, when the width direction dimension W23e1 of the end 23e1 in the longitudinal direction of the second absorbent core 23 is large, a large resistance force against deformation acts on the first absorbent core 13 from the end 23e1. That is, when the through-hole 13h of the first absorbent core 13 is crushed in the width direction by the crotch tightening force, a large pulling resistance force that hinders this is exerted from the end 23e1 of the second absorbent core 23. Is granted. However, with regard to this point, in this example, the dimension W23e1 in the width direction of the end 23e1 of the second absorbent core 23 is reduced. Therefore, the resistance force is reduced, and as a result, the through hole h13 can be smoothly and quickly crushed in the width direction based on the crotch tightening force F.

  As shown in FIG. 8B and FIG. 8C, such a second absorbent core 23 is also covered with a tissue paper 25 as an example of a second liquid-permeable sheet in order to keep the core 23 from collapsing and keep its shape. Has been. For example, in this example, the tissue paper 25 is wound in the width direction so as to wrap around the entire outer peripheral surface of the second absorbent core 23, and the joint of the tissue paper 25 is formed on the second absorbent core 23. Located on the non-skin side. However, it is not limited to this. For example, the entire outer peripheral surface of the second absorbent core 23 may be wrapped by winding the tissue paper 25 in the longitudinal direction, or the joint may be located on the skin side surface of the second absorbent core 23. good. Further, the second liquid-permeable sheet 25 used for covering the second absorbent core 23 is not limited to the tissue paper 25. That is, the sheet can be used in place of the tissue paper 25 as long as the sheet has appropriate liquid permeability and flexibility.

In addition, the tissue paper 25 and the second absorbent core 23 are joined by an adhesive A53 at least at a part of each other. For example, in the example of FIGS. 8B and 8C, the tissue paper 25 is joined to the skin side surface of the second absorbent core 23 by the adhesive A53. Therefore, the 2nd absorptive core 23 can perform stress transmission reliably between the 1st absorber 11 via the tissue paper 25, and can suppress the above-mentioned position shift phenomenon effectively by this. It becomes.
Incidentally, it is important to join the tissue paper 25 on the skin side surface of the second absorbent core 23 as described above from the viewpoint of the transmission of stress between the first absorbent body 11 and the second absorbent core 23. The non-skin side surface of the absorbent core 23 may not be particularly bonded to the tissue paper 25. Therefore, in the example of FIGS. 8B and 8C, the adhesive A53 is not provided on the non-skin side surface of the core 23, so that the tissue paper 25 is joined on the non-skin side surface of the core 23. Not.

  By the way, as mentioned above, the 1st absorber 11 coat | covers the 1st absorptive core 13 with the tissue paper 15, and the 2nd absorber 21 also has the 2nd absorptive core 23 for the tissue paper 25 similarly. It is coated with. Therefore, the adhesive A12 that joins the first absorbent body 11 and the second absorbent body 21 is applied to at least one of the two tissue papers 15 and 25. The first absorbent body 11 and the second absorbent body 21 are joined by joining the tissue papers 15 and 25 together. And in this example, as shown to FIG. 8C, the application | coating area | region of this adhesive agent A12 is each part 11cs of the both sides of the width direction of the through-hole 13h among the 1st absorbers 11 at least regarding the width direction. Positions RAs and RAs corresponding to 11 cs are set. Therefore, the above-described positional shift phenomenon related to the first absorber 11 can be reliably suppressed. Incidentally, in the example of FIG. 8C, the application region of the adhesive A12 is further set at the position RAc between these portions 11cs, 11cs, but the adhesive A12 at this position RAc is omitted. You can also Moreover, regarding the longitudinal direction, the application region of the adhesive 12 is set over the entire length of the first absorbent body 11 or the second absorbent body 12, whereby the first absorbent body 11 and the second absorbent body 12. Stabilization of the joint is achieved. However, the present invention is not limited to this, and may be set at a position in the longitudinal direction of the first absorbent body 11 or the second absorbent body 12. For example, if the application region of the adhesive 12 is set at the positions of at least the portions 11cs and 11cs on both sides of the through-hole 13h with respect to the longitudinal direction, the above-described positional shift phenomenon related to the first absorber 11 can be reliably ensured. Can be suppressed. Therefore, depending on the case, you may set the application area | region of the adhesive agent 12 only in the position of said each part 11cs and 11cs.

  In addition, referring to FIG. 6B before, “the end portions 40e2 and 40e2 in the width direction of the back sheet 40 (corresponding to the second sheet-like member) are respectively covered by the side sheets 50 and 50”. As described above, in the covered portion 40e2, the second elastic member 57 such as rubber thread is disposed along the longitudinal direction (FIG. 5), and the second elastic member 57 is disposed in the longitudinal direction. In the stretched state, it is fixed to both the back sheet 40 and the side sheet 50 with an adhesive A45. And the position where the said 2nd elastic member 57 is fixed is predetermined | prescribed from the center part 13c bundled in the width direction of the 1st absorptive core 13 to the edge side of the width direction so that it may understand with reference to FIG. The positions are spaced apart by an interval, and such positions correspond to positions around the wearer's legs. Therefore, when the back sheet 40 and the side sheet 50 are contracted by the contraction force of the second elastic member 57, so-called leg-hole gathers are formed at the same position. In other words, leg end gathers are formed at the end portions 1e2 and 1e2 in the width direction of the urine collecting pad 1, and such leg gathers also contribute to prevention of urine leakage.

  Here, as with the first elastic member 55 of the leak-proof wall portion 52, the second elastic member 57 is also based on the contraction force in the longitudinal direction so that the top sheet 30 side becomes the inner peripheral side. Is curved in the longitudinal direction. That is, in an unloaded state where no external force is applied to the urine collection pad 1, the pad 1 is bent by the contraction force so that the thickness direction of the urine collection pad 1 becomes the curvature radius direction. As a result, the urine absorbing pad 1 has a substantially arc shape along the crotch of the wearer, and as a result, can be worn on the lower body of the wearer with high fit.

In addition, the contraction force of the second elastic member 57 can also contribute to standing the leak-proof wall portion 52 larger. As a result, the leak-proof wall 52 is likely to stand up easily at the central portion 1c in the longitudinal direction of the urine absorbing pad 1, and as a result, the leak-proof property between the crotch corresponding to the central portion 1c is enhanced. be able to. Details are as follows.
First, as shown in FIG. 5, the shape of the 1st absorptive core 13 is a substantially hourglass shape, ie, the center part 13c of the longitudinal direction of the 1st absorptive core 13 is bundled in the width direction. Therefore, in the central portion 13c, the cross-sectional area that receives the contraction force of the second elastic member 57 is small. Therefore, the contraction force mainly acts on the leak-proof wall portion 52. Then, the portion 52p located at the same position in the longitudinal direction as the central portion 13c in the leak-proof wall portion 52 is particularly greatly contracted, and as a result, the same portion 52p is raised in a particularly large state. Here, the longitudinal central portion 13c of the first absorbent core 13 corresponds to the wearer's crotch. Therefore, leakage of urine from the crotch can be effectively prevented by the leakage preventing wall portion 52.

<<< About manufacturing method of urine absorption pad 1 >>>
The above-described urine collecting pad 1 is manufactured, for example, as follows by an appropriate manufacturing apparatus.
First, the first absorbent core 13 is generated by the first stacking device. The first stacking device includes, for example, a suction belt conveyor that conveys a conveyance object while adsorbing the conveyance object to the conveyance surface, and a first rotating drum that is disposed to face the conveyance surface and rotates.

  The first rotating drum has a substantially hourglass-shaped recess corresponding to the planar shape of the first absorbent core 13 on the outer peripheral surface. Moreover, the protrusion corresponding to the through-hole 13h which is said small basic weight part is provided in the center part of the dent part. Therefore, the liquid absorbent material sprayed from an appropriate duct is stacked by adsorbing the dents on the outer peripheral surface, thereby generating the substantially hourglass-shaped first absorbent core 13 having the above-described through holes 13h. Is done. And the produced | generated 1st absorptive core 13 is wrapped in the continuous body of the tissue paper 15 conveyed with said suction belt conveyor from a width direction, and, thereby, the continuous body of the 1st absorber 11 is produced | generated. The Before the wrapping, for example, adhesives A15a, A15b, A15c are applied in advance to the continuous body of tissue paper 15, and the continuous body of tissue paper 15 and the first absorption are applied by the adhesives A15a, A15b. The adhesive core 13 is joined. And the continuous body of this 1st absorber 11 is conveyed downstream in the conveyance direction as it is.

  Similarly, the 2nd absorptive core 23 is produced | generated by a 2nd stacking apparatus. Similarly to the above-described first pile device, the second pile device has a suction belt conveyor and a second rotating drum. In addition, the main difference in structure between the first fiber stacking apparatus is that the shape of the dent portion on the outer peripheral surface of the second rotating drum is a rectangular shape corresponding to the planar shape of the second absorbent core 23. The other points are substantially the same as those of the first stacking device. That is, the produced | generated 2nd absorptive core 23 is wrapped in the continuous body of the tissue paper 25, and, thereby, the continuous body of the 2nd absorber 21 is produced | generated, and it is conveyed downstream as a conveyance direction as it is. Or, before wrapping, the adhesive A53 is already applied to the continuous body of the tissue paper 25, and the continuous body of the tissue paper 25 and the second absorbent core 23 are joined by the adhesive A53. The point is the same. Therefore, the description is omitted.

  If it does so, both the continuous body of the 1st absorber 11 and the continuous body of the 2nd absorber 21 will be piled up in thickness direction, conveying it downstream. Before the superposition, an adhesive A12 is applied in advance to at least one of the surfaces to be superposed on each other. Therefore, when superposed, the continuous body of the first absorbent body 11 and the continuous body of the second absorbent body 21 are joined by the adhesive A12, whereby the continuous body of the absorbent body 10 having a two-layer structure is joined. A body is generated. If it does so, the continuous body of the absorber 10 will be sent to the rotary cutter apparatus downstream in a conveyance direction.

  The rotary cutter device has a pair of rotating rolls, and a cutter blade is provided on the outer peripheral surface of one of the rolls. Therefore, when passing through the rotary cutter device, the continuous body of the absorbent body 10 is divided at a position between the absorbent cores 13 (23) and 13 (23) aligned in the transport direction, whereby the first A single sheet-like absorber 10 is generated with a two-layer structure in which the absorber 11 and the second absorber 21 are joined in the thickness direction. Then, each single-sheet absorber 10 is sequentially sent downstream in the transport direction.

  At a predetermined position on the downstream side in the transport direction, the continuous body of the top sheets 30 merges from the skin side in the thickness direction. Here, before this merging, the adhesive A30 is applied in advance to the non-skin side surface of the continuous body of the top sheet 30 or the skin side surface of the absorbent body 10. Therefore, the continuous body of the surface sheet 30 and each absorber 10 are joined by covering each absorber 10 with the continuous body of the surface sheet 30 from the skin side in the said merge position. And the continuous body of the surface sheet 30 and each absorber 10 are united, and are conveyed further downstream in a conveyance direction.

At a predetermined position on the downstream side in the transport direction, the continuous body of the back sheet 40 in which the continuous body of the pair of side sheets 50, 50 is joined from the non-skin side in the thickness direction. That is, the continuous body of each side sheet 50 is bonded and fixed to each side of the continuous body of the back sheet 40 with the adhesive A45, and the continuous body of each side sheet 50 is in an extended state. The first elastic member 55 is already fixed, and the extended second elastic member 57 is already fixed to the back sheet 40. And before joining, adhesive A40, A35, A35 is beforehand apply | coated to the skin side of the continuous body of the back surface sheet 40, and the non-skin side surface of the edge part 50e2, 50e2 of the width direction of the side sheet 50.
Therefore, the continuous body of the back sheet 40 and each absorption body are covered by the continuous body of the back sheet 40 from the non-skin side of each absorbent body 10 joined to the continuous body of the top sheet 30 at the joining position. The body 10 is joined. Further, the end portions 50e2 and 50e2 in the width direction of the side sheet 50 are wound up to the skin side by appropriate guide members, so that the end portions 50e2 cover the end portions 30e2 in the width direction of the continuous body of the topsheet 30. Then, it is fixed in this covered state by the adhesive A35 previously applied. Thereby, the continuous body of the urine picking pad 1 is produced | generated. And the continuous body of this urine picking pad 1 is sent to the die-cutter apparatus of the downstream of a conveyance direction.

  The die cutter device has a pair of rotating rolls, and a cutter blade is provided on the outer peripheral surface of one of the rolls. Therefore, when the continuous body of the urine collecting pad 1 passes through the die cutter device, the continuous body of the urine collecting pad 1 is divided at a position between the urine collecting pads 1 and 1 adjacent to each other in the transport direction by the cutter blade. Thus, a single-cut urine collecting pad 1 is generated.

=== Second Embodiment ===
FIG. 9 is a schematic plan view of the urine absorbing pad 1 of the second embodiment. Moreover, FIG. 10A is AA sectional drawing and CC sectional drawing in FIG. 9, FIG. 10B is BB sectional drawing in FIG.
As shown in FIG. 9, FIG. 10A, and FIG. 10B, in this 2nd Embodiment, the pressing part formed by pressing both the 1st absorber 11 and the 2nd absorber 21 from the skin side of the thickness direction together. E10 and E10 are formed along the longitudinal direction. This point is mainly different from the first embodiment described above, and other points are substantially the same as those in the first embodiment. Therefore, in the following, this difference will be mainly described, the same components as those in the first embodiment will be denoted by the same reference numerals, and description thereof will be omitted.

  The pressing part E10 is formed in each of the portions 11cs and 11cs located on both sides in the width direction of the through hole 13h in the first absorbent body 11 when viewed from the thickness direction. And each pressing part E10 is formed in the linear form along a longitudinal direction, and is formed over the full length of the 1st absorber 11 in the longitudinal direction.

  Here, when the center part 1c of the longitudinal direction of the urine picking pad 1 bend | folds in the width direction, this pressing part E10 becomes the starting point of the bending. Therefore, when the crotch tightening force F acts on the central portion 1c, the central portion 1c is bent at the position of the compressed portion E10 as the through hole 13h of the first absorbent core 13 is crushed in the width direction. Therefore, the dimension in the width direction of the central portion 1c is adjusted more quickly and smoothly to the dimension in the width direction of the crotch. Moreover, by bending at the position of the pressing part E10, it is possible to effectively prevent unintentional bending at places other than the pressing part E10. As a result, the shape of the central part 1c of the urine collecting pad 1 is unexpected. It can prevent becoming a shape.

  Moreover, since the said compression part E10 is formed along the longitudinal direction, the bending rigidity of the longitudinal direction of the urine picking pad 1 is raised moderately. Therefore, the shape of the urine collecting pad 1 can be maintained in a state in which the urine collecting pad 1 is moderately stretched in the longitudinal direction, which makes it easy to attach the pad 1 to the diaper 101 when the urine collecting pad 1 is replaced. That is, as described above with reference to FIG. 4, the replacement of the urine removing pad 1 is performed in a state where the wearer lowers the diaper 101 to below the knee, but here, the diaper 101 is folded in two. When attaching the new urine collecting pad 1, the pad 1 is placed in the diaper 101 with the folding position CL 1 of the pad 1 as the head, and the pad 1 is placed in the center position of the top sheet 130 of the diaper 101. I will move to. However, since the space in the diaper 101 is narrow, there is a possibility that the head of the urine removing pad 1 may be caught in a portion other than the center position before the head of the urine collecting pad 1 reaches the target center position. At this time, if the rigidity of the urine collecting pad 1 is low, the pad 1 is easily bent by this catch. As a result, in addition to opening the two folds, an operation for correcting the bending occurs, and as a result, the replacement time of the urine collecting pad 1 becomes long.

  About this point, if it has the above-mentioned pressing part E10, E10, since the bending rigidity of the urine removing pad 1 is enhanced, even if the urine collecting pad 1 in a folded state is caught on something, As a result, the urine collecting pad 1 can be easily attached to the diaper 101.

Desirably, as shown in FIG. 10A and FIG. 10B, an adhesive may be located at the formation position of the compressed portions E10 and E10. That is, an adhesive A15a that joins the skin side of the first absorbent core 13 and the tissue paper 15, an adhesive A15b that joins the non-skin side of the core 13 and the paper 15, the first absorbent body 11 and the second At least one of the adhesive A12 that joins the absorbent body 21 and the adhesive A53 that joins the skin side surface of the second absorbent core 23 and the tissue paper 25 is located at the position of the compressed portion E10. Good to be. More desirably, all the adhesives A15a, A15b, A12, and A53 are located, and this is the case in the examples of FIGS. 10A and 10B.
And if it becomes like this, the rigidity of the urine pick-up pad 1 can further be heightened by the synergistic effect of this adhesive A15a, A15b ... and the pressing part E10.
In addition, in the example of FIG. 9, although the pressing part E10 is formed as a groove part along a longitudinal direction, and the depth of a groove part is made constant over the full length of a longitudinal direction, what is this? Not exclusively. For example, the groove part may have a deep part and a shallow part having different depths. Moreover, the pressing part E10 is not limited to any groove part. For example, the pressing part E10 may have a configuration in which a plurality of indentations formed in an island shape are arranged along the longitudinal direction. In addition, as a shape of the bottom face of a dent part, circular and a rectangle can be illustrated.

=== Other Embodiments ===
As mentioned above, although embodiment of this invention was described, said embodiment is for making an understanding of this invention easy, and is not for limiting and interpreting this invention. Further, the present invention can be changed or improved without departing from the gist thereof, and needless to say, the present invention includes equivalents thereof. For example, the following modifications are possible.

  In the above-described embodiment, the urine collecting pad 1 is illustrated as an absorbent article that absorbs urine, and the pad 1 is attached to the pant-type diaper 101. However, the pad 1 is attached to any pants. Not only the type diaper 101 but also a tape-type diaper (a diaper in which the front body and the back body are connected with a fastening tape when worn) may be used. The absorbent article is not limited to the urine collecting pad 1. That is, the characteristic structure of the present invention (the first absorbent body 11 having the small basis weight portion 11h and the second absorbent body 21 joined to the non-skin side of the first absorbent body 11 covering the small basis weight portion 11h). You may apply the structure which had) with respect to the disposable diaper.

  In the above-described embodiment, as an example of the small basis weight portion 11h of the first absorbent body 11, the portion where the basis weight of the liquid absorbent material is zero is exemplified. That is, the small basis weight part 11h had the through-hole 13h which penetrates the 1st absorptive core 13 which concerns on the said 1st absorber 11 in the thickness direction. However, it is not limited to this. That is, if the basis weight of the liquid absorbent material is smaller than the surrounding portion, the small basis weight portion 11h can be selectively crushed in the width direction by the action of the crotch tightening force F. 11h does not need to have the through-hole 13h along the thickness direction. Furthermore, in other words, the basis weight of the liquid absorbent material in the small basis weight portion 11h may not be zero. Incidentally, from the viewpoint of easy crushing in the width direction described above, the basis weight of the small basis weight portion 11h is preferably 50% or less of the basis weight of the surrounding portion, and more preferably 30% or less. More preferably, it is 10% or less.

  In the above-described embodiment, the shape of the through hole 13h that is the small basis weight portion 11h of the first absorbent body 11 seen from the thickness direction is an oval shape as an example of the vertically long shape along the longitudinal direction. Not limited to. For example, a rectangular shape or a substantially hourglass shape may be used. That is, the two long sides along the longitudinal direction do not have to be linear, and for example, the position in the width direction may change according to the position in the longitudinal direction like a curved shape. Further, for the two short sides along the width direction, for example, the position in the longitudinal direction may be changed according to the position in the width direction like a curved shape.

  In the above-described embodiment, only the second absorbent body 21 is provided on the non-skin side surface of the first absorbent body 11. However, the present invention is not limited to this. That is, one or more absorbers may be additionally provided on the non-skin side surface of the second absorber 21.

  In the above-described embodiment, the adhesive A12 is used for joining the first absorbent body 11 and the second absorbent body 21, but the joining method is not limited to this. For example, the pressing part formed by pressing the first absorbent body 11 and the second absorbent body 21 together in the thickness direction is partially formed on the skin side surface of the first absorbent body 11, and the first compressed section is used for the first. The absorber 11 and the second absorber 21 may be joined, or in some cases, may be joined by welding.

  In the above-described embodiment, the shape of the second absorbent core 23 viewed from the thickness direction is a rectangle, but the shape of the second absorbent core 23 is not limited to this. For example, it is good also as a substantially hourglass shape of the same shape as the 1st absorptive core 13, or it is good also as a substantially hourglass shape of the size which does not protrude to the both sides of the width direction rather than the 1st absorptive core 13.

  In the above-described embodiment, the small basis weight portion 11h (through hole 13h) is provided only in the central portion 11c in both the longitudinal direction and the width direction of the first absorbent body 11, but this is not a limitation. For example, in addition to the small basis weight portion 11h of the central portion 11c, another small basis weight portion may be provided in the first absorbent body 11. For example, each of the first absorbent bodies 11 is provided with an elongated small basis weight portion along the longitudinal direction for each of the portions 11cs and 11cs at both sides in the width direction of the small basis weight portion 11h of the central portion 11c. May be.

1 Urine collecting pad (absorbent article), 1c center part,
1e2 end,
10 Absorber with a two-layer structure,
11 1st absorber, 11c center part, 11cs part,
11h Dented part (small basis weight part),
13 first absorbent core,
13a wide part, 13b wide part,
13c center part, 13cs part,
13h through hole, 13he1 end,
13hee1a front end, 13hee1b rear end,
13p part,
15 tissue paper (first liquid permeable sheet),
21 second absorber,
23 second absorbent core, 23L long side, 23W short side,
23e1 end, 23e2 end,
25 tissue paper (second liquid permeable sheet),
30 surface sheet, 30e2 edge, 30ee2 edge,
40 back sheet (second sheet-like member), 40ee2 edge,
40e2 end,
50 side sheet (first sheet-like member),
50b base, 50e2 end,
50f free end part, 50fa front end part, 50fb rear end part, 50fm middle part,
52 leak-proof wall, 52p part,
55 1st elastic member, 57 2nd elastic member,
61 Male material,
101a front body, 101ae2 end,
101b back body, 101be2 end,
101m inseam,
110 absorber,
130 top sheet, 140 back sheet,
A12 Adhesive,
A15a adhesive, A15b adhesive, A15c adhesive,
A30 adhesive, A35 adhesive, A40 adhesive,
A45 Adhesive, Adhesive A50f, A53 Adhesive,
E10 pressing part,
RAs position, RAs position,
CL1 center position, CL101 center position,
P13ra front side necking start position, P13rb rear side necking start position,

Claims (9)

An absorbent article having a thickness direction, a width direction, and a longitudinal direction and absorbing urine,
A first absorber comprising a liquid absorbent material that absorbs urine;
A second absorbent comprising a liquid absorbent material that is provided on the non-skin side in the thickness direction from the first absorbent and absorbs urine;
A surface sheet joined to the first absorbent body while covering the first absorbent body from the skin side in the thickness direction ;
The first absorbent body has a small basis weight portion in which a basis weight (g / m ² ) of the liquid absorbent material is smaller than a portion around the center portion at a center portion in both the longitudinal direction and the width direction. Have
The second absorbent body is joined to the first absorbent body in a state of covering the small basis weight portion from the non-skin side ,
The first absorbent body has a first absorbent core formed by laminating the liquid absorbent material,
The small basis weight portion has a through-hole formed through the first absorbent core in the thickness direction in the central portion of the first absorbent body.
The second absorbent body has a second absorbent core formed by laminating the liquid absorbent material.
The first absorbent body has a first liquid-permeable sheet that covers the first absorbent core,
The second absorbent body has a second liquid-permeable sheet that covers the second absorbent core,
The first absorbent core and the first liquid permeable sheet are joined by an adhesive,
The second absorbent core and the second liquid permeable sheet are joined by an adhesive,
An adhesive is provided on a portion of the first liquid permeable sheet facing the through hole,
The first liquid permeability located on the non-skin side of the first absorbent core in a state where the facing portion provided with the adhesive is pushed into the non-skin side along the penetration direction of the through hole. It is joined to the part of the sheet,
The top sheet is joined to the first liquid-permeable sheet in a state where the top sheet is pushed into the non-skin side along the penetration direction of the through-hole,
In each portion of the first absorbent body located on both sides of the through hole in the width direction, both the first absorbent body and the second absorbent body are joined together on the skin side in the thickness direction. Squeezed from the squeezed part is formed along the longitudinal direction,
The pressing part is an adhesive that joins the skin side surface of the first absorbent core and the first liquid permeable sheet, and an adhesive that joins the non-skin side surface of the first absorbent core and the first liquid permeable sheet. An adhesive for bonding the first absorbent body and the second absorbent body, and an adhesive for bonding the skin side surface of the second absorbent core and the second liquid-permeable sheet to the first absorbent. The absorbent article is compressed together with the body and the second absorbent body . The absorbent article according to claim 1,
The absorption characterized in that the first absorbent body and the second absorbent body are joined at least at each portion of the first absorbent body located on both sides in the width direction of the small basis weight portion. Sex goods. The absorbent article according to claim 1 or 2 ,
The shape is that viewed from the first absorbent core the thickness direction has a shape central portion of the longitudinal direction is narrowed in the width direction,
The widthwise dimension of the longitudinal end of the second absorbent core is smaller than the widthwise dimension of the first absorbent core at the same position in the longitudinal direction. Absorbent article. The absorbent article according to any one of claims 1 to 3 ,
The shape is that viewed from the first absorbent core the thickness direction has a shape central portion of the longitudinal direction is narrowed in the width direction,
When the dimension in the width direction is compared at the same position in the longitudinal direction, the dimension in the width direction of the second absorbent core is provided with the small basis weight portion in the first absorbent core. Smaller than or equal to the dimension in the width direction of the portion,
The size in the width direction of the small basis weight portion is smaller than the size in the width direction of the second absorbent core at the same position in the longitudinal direction. The absorbent article according to claim 4 ,
The shape of the second absorbent core as viewed from the thickness direction is a rectangular shape. The absorbent article according to any one of claims 1 to 5 ,
In the portions other than the respective end portions in the longitudinal direction among the small basis weight portions, the ratio of the dimension in the width direction of the small basis weight portion to the dimension in the width direction of the first absorbent core is 30% to 50%. % Range,
The absorbent article according to claim 1, wherein the shape of the small basis weight portion viewed from the thickness direction is a vertically long shape in which the dimension in the longitudinal direction is larger than the dimension in the width direction. The absorbent article according to any one of claims 1 to 6 ,
As a sheet-like member that covers the first absorber or the second absorber from the thickness direction , it has a first sheet-like member and a second sheet-like member ,
A first elastic member fixed to the first sheet-like member; and a second elastic member fixed to the second sheet-like member ;
The first sheet-like member, together with the provided side by side in pairs in the width direction to form a respective leakage preventing walls at each end of the width direction, the surface sheet from the skin side of the thickness direction Bonded to the top sheet while covering,
When the first elastic member of the first sheet-shaped member contracts, the first sheet-shaped member is moved in the longitudinal direction based on a contracting force applied from the first elastic member to the first sheet-shaped member. By shrinking, it stands up from the top sheet and becomes the leakage barrier part ,
The shape is that viewed from the first absorbent core the thickness direction has a shape central portion of the longitudinal direction is narrowed in the width direction,
The second elastic member of the second sheet-like member is disposed at a position spaced apart from the central portion in the longitudinal direction of the first absorbent core by a predetermined interval in the width direction. Goods. The absorbent article according to any one of claims 1 to 7,
The absorbent article, wherein the basis weight of the second absorbent core is set in a range of 50% to 80% of the basis weight of the first absorbent core. The absorbent article according to any one of claims 1 to 8,
When viewed in the thickness direction, the first absorbent body has a shape in which a central portion in the longitudinal direction is constricted in the width direction, and the second absorbent body has a rectangular shape,
  The widthwise dimension of the second absorbent body is the same as the minimum value of the widthwise dimension of the central portion of the first absorbent body.

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