JP5225640B2 - Absorbent articles - Google Patents

Description

  The present invention relates to an absorbent article, and more particularly, to an absorbent article such as a disposable diaper, defecation training pants, and an incontinence brief.

Conventionally, in a disposable diaper, for example, Japanese Laid-Open Patent Publication No. 59-144601 (Patent Document 1) is known as a configuration for releasing steam inside the diaper to the outside.
According to this Patent Document 1, the diaper has a top sheet positioned on the body side and a back sheet positioned on the clothing side, and is attached between the front and back sheets and on the waist opening in the waist circumferential direction. It is equipped with a resilient elastic film. The front and back sheets and the elastic film are intermittently joined in the width direction. In the non-joining part between the front and back sheets and the elastic film, the front and back sheets are bent by the shrinkage of the elastic film, and an open channel is formed between the front and back sheets. Via this open channel, the vapor inside the diaper is guided to the outside.
JP 59-144601 A

  In the diaper of Patent Document 1, one end of the open channel faces the outside of the diaper, and the other end faces the region adjacent to the liquid absorbing structure. That is, the other end of the open channel does not reach the liquid absorbing structure. Therefore, this open channel can release the vapor in the vicinity of the waist opening between the waist opening and the liquid absorption structure to the outside, but the crotch region generated from the liquid absorption structure that has absorbed the body fluid. It was difficult to discharge even the steam to the outside. Therefore, there has been a problem that it is inevitable that the wet feeling becomes stronger in the crotch region after the body fluid is excreted.

  It is an object of the present invention to provide an absorbent article that can release the internal vapor to the outside and reduce the wet feeling.

  The present invention includes a height direction, a front-rear direction, a circumferential direction, a body-side inner surface, a clothing-side outer surface, a belt member that forms a front waist region and a rear waist region and forms a ring in the circumferential direction, and the front-rear waist region The belt member is related to the improvement of the absorbent article having waist contracting means for contracting and energizing in the circumferential direction.

According to a first aspect of the present invention, in the absorbent article, the liquid absorbing structure has a first end and a second end facing and separating in the front-rear direction, and an outer surface of the first end is the first. The waist contracting means overlaps with the inner surface of the belt member in the front waist region through a multilayer region, and the outer surface of the second end portion overlaps with the inner surface of the belt member in the rear waist region through a second multilayer region. Overlaps a part of at least one of the first multi-layer region and the second multi-layer region, and the liquid absorbing structure and the belt member include at least the waist contracting means, the first or second multi-layer region, Are overlapped by a plurality of joints extending in the height direction and intermittently arranged in the circumferential direction, and the crotch region and the front and rear waists are formed by a first non-joint part located between the joints. Communicating with the area The is elongated in the ventilation path in the height direction form a plurality to said circumferential direction, wherein the joint is a continuous joint for joining said belt member and said liquid-absorbent structure extending the height direction, and wherein A portion extending in the height direction and joining the liquid absorbing structure and the belt member, and a portion extending in the height direction and not joining the liquid absorbing structure and the belt member are intermittently arranged in the height direction. It is characterized by including a junction part .
According to a second aspect of the present invention, in the absorbent article, the liquid absorbing structure has a first end and a second end facing and separating in the front-rear direction, and an outer surface of the first end is the first. The waist contracting means overlaps with the inner surface of the belt member in the front waist region through a multilayer region, and the outer surface of the second end portion overlaps with the inner surface of the belt member in the rear waist region through a second multilayer region. Overlaps a part of at least one of the first multi-layer region and the second multi-layer region, and the liquid absorbing structure and the belt member include at least the waist contracting means, the first or second multi-layer region, Are overlapped by a plurality of joints extending in the height direction and intermittently arranged in the circumferential direction, and the crotch region and the front and rear waists are formed by a first non-joint part located between the joints. Communicating with the area A plurality of air passages elongated in the height direction are formed in the circumferential direction, and the joint portion extends in the height direction to join the liquid absorbing structure and the belt member, and A portion extending in the height direction and joining the liquid absorbing structure and the belt member, and a portion extending in the height direction and not joining the liquid absorbing structure and the belt member are intermittently arranged in the height direction. The continuous joint portion is formed in the vicinity of the both side edges of the first and second multilayer regions, and the intermittent joint portion is formed on one side edge of the continuous joint portion. It is formed between the said continuous junction part formed in the said other side edge.
According to a third aspect of the present invention, in the liquid-absorbent article, the liquid-absorbing structure has a first end and a second end facing and separating in the front-rear direction, and an outer surface of the first end is the first. The inner surface of the belt member in the front waist region overlaps with the inner surface of the belt member through the single layer region, and the outer surface of the second end portion overlaps with the inner surface of the belt member in the rear waist region through the second layer region. The means overlaps a part of at least one of the first multi-layer area and the second multi-layer area, and the liquid absorbing structure and the belt member include at least the waist contracting means and the first or second multi-layer area. Are joined by a plurality of joints extending in the height direction and intermittently arranged in the circumferential direction, and the crotch region and the front and rear are joined by a first non-joint part located between the joints. Communicating with the waist A plurality of air passages elongated in the height direction are formed in the circumferential direction, and the joint portion extends in the height direction to join the liquid absorbing structure and the belt member, and A portion extending in the height direction and joining the liquid absorbing structure and the belt member, and a portion extending in the height direction and not joining the liquid absorbing structure and the belt member are intermittently arranged in the height direction. The intermittent joint is formed in the vicinity of the both side edges of the first and second multilayer regions, and the continuous joint is formed on one of the side edges. It forms between the said intermittent junction part formed in the said other side edge, It is characterized by the above-mentioned.

  As one preferred embodiment, the air passage includes a first air passage formed between the inner surface of the liquid absorbing structure and a wearer's body, the outer surface of the liquid absorbing structure, and the belt member. A second air passage formed between the inner surface and the inner surface.

As another preferred embodiment, the first and second multi-layer regions are defined by upper and lower end edges facing and separating in the height direction and both side edges facing and separating in the circumferential direction, and the upper and lower ends. A second non-joining portion is formed at at least one of the edges.

As another preferred embodiment, the joining portion extends in the height direction to join the liquid absorbing structure and the belt member, and the joining portion extends in the height direction to the liquid absorbing structure. A portion that joins the body and the belt member and an intermittent joint portion that extends in the height direction and arranges a portion that does not join the liquid absorbing structure and the belt member in the height direction.

One preferred another embodiment, the pre-Symbol continuous joint is formed in the vicinity of the side edges of the first and second layer regions, the intermittent joint, formed on one of said side edges wherein It is formed between the continuous joint and the continuous joint formed on the other side edge.

  As another preferred embodiment, the intermittent joint is formed in the vicinity of the both side edges of the first and second multilayer regions, and the continuous joint is formed in one of the side edges. It is formed between the joint and the intermittent joint formed on the other side edge.

  As another preferred embodiment, the belt member forms a plurality of ventilation holes penetrating in the thickness direction.

As another preferred embodiment, the liquid-absorbing structure includes a surface sheet positioned on the body-side inner surface, a back sheet positioned on the clothing-side outer surface, and a liquid-absorbing property interposed between the front and back sheets. A core and a cover sheet covering at least one of the first end and the second end are included, and the air permeability of the cover sheet is 0.15 kPa · S / m ² or less.

  In the present invention, the belt member is provided with waist contraction means capable of contracting in the circumferential direction, and the first and second multilayer regions in which the liquid absorbing structure and the belt member overlap with each other extend in the height direction and intermittent in the circumferential direction. Are joined by joints lined up side by side. An air passage that connects the crotch region and the front / rear waist region is formed at the non-joint portion located between the joint portions. Since the vapor in the crotch region is released to the outside of the absorbent article through this air passage, the wet feeling inside can be reduced.

  1-5 shows 1st Embodiment about the disposable diaper as an example of the absorbent article of this invention. FIG. 1 shows a state when a diaper is worn, and a part of the diaper is cut out for easy explanation. As shown in the figure, the diaper comprises a front waist region 1 and a rear waist region 2 and forms a ring in the circumferential direction R, and a liquid absorbing material that forms a crotch region 3 positioned between the front and rear waist regions 1 and 2. And the structure 5.

  The belt member 4 has a front belt portion 6 located in the front waist region 1 and a rear belt portion 7 located in the rear waist region 2, and the side edges 8 in the circumferential direction R of the front and rear belt portions 6, 7. 9 have a seam portion 11 formed by a plurality of side edge joint portions 10 that overlap each other and are intermittently arranged in the height direction Z. Thus, the waist opening is defined by joining the front and rear belt parts 6 and 7 at the side edge joint part 10.

The front belt portion 6 includes an inner surface sheet 14 constituting the body side inner surface 12 and an outer surface sheet 15 forming the clothing side outer surface 13, and a thread-like waist elastic member serving as a waist contracting means between the inner and outer surface sheets 14,15. 18 is provided. The inner and outer surface sheets 14 and 15 are formed of a single fiber nonwoven fabric, and are folded at the waist side opening end 19 to sandwich the waist elastic member 18.
Similarly, the rear belt portion 7 includes inner and outer surface sheets 16 and 17 and a waist elastic member 18 interposed therebetween, and the inner and outer surface sheets 16 and 17 fold back one fiber nonwoven fabric at the waist side opening end 19. It is a thing. As the fiber nonwoven fabric, general materials obtained by a spunbond method, a melt blown method, a point bond method, a through air method, or the like can be used.

The waist elastic member 18 extends in the circumferential direction R and is intermittently disposed in the height direction Z from the waist side opening end 19 to the crotch side opening end 20 of the front and rear belt portions 6 and 7. The waist elastic member 18 is attached in an extended state and urges the belt member 4 to contract in the circumferential direction R. The interval between the waist elastic members 18 in the height direction Z is preferably 8 to 10 mm, and can be arranged in the circumferential direction R by extending 1.5 to 3.0 times.
The waist elastic member 18 is joined to at least one of the inner and outer surface sheets 14 and 15 or at least one of the inner and outer surface sheets 16 and 17 via an adhesive (not shown).

  The liquid-absorbing structure 5 is interposed between the liquid-permeable surface sheet 21 constituting the body-side inner surface 12, the liquid-impermeable back sheet 22 constituting the clothing-side outer surface 13, and the front and back sheets 21 and 22. A liquid-absorbent core 23 wrapped with tissue paper (not shown), and the liquid-absorbent core 23 is fixed to at least one of the front and back sheets 21 and 22. A moisture-permeable and liquid-impervious film can be used as the back sheet 22, but in this case, a non-woven fabric obtained by a spunbond method, a through-air method, or the like can be laminated separately to improve the touch. .

  The liquid absorbing structure 5 includes a first end 24 and a second end 25 that extend in the crotch region 3 in the front-rear direction Y and are opposed to and separated from each other in the front-rear direction Y. The liquid impervious back sheet 22 at the first end 24 is overlapped with the inner sheet 14 of the front belt part 6 to form a first multilayer region 26, and the liquid impervious back sheet 22 at the second end 25 is rearward. A second multilayer region 27 is formed so as to overlap the inner surface sheet 16 of the belt portion 7. In the first multi-layer region 26 and the second multi-layer region 27, the front and rear belt portions 6 and 7 and the liquid absorbing structure 5 are joined by the joint portion 32, and by these joints, the crotch side open end 20 of the front and rear belt portions 6 and 7 and A pair of side edges 28 extending in the front-rear direction Y of the liquid absorbing structure 5 form a leg-hole opening 29.

FIG. 2 is a plan view obtained by removing the side edge joint 10 of FIG. 1 and developing the diaper in the front-rear direction Y. FIG. In FIG. 2, the waist elastic member 18 and the crotch elastic member 31 are in an extended state and are not contracted and biased.
As illustrated, the front and back sheets 21 and 22 of the liquid absorbing structure 5 have a substantially rectangular shape, and the liquid absorbing core 23 has a substantially hourglass shape. That is, the liquid absorbent core 23 is curved so that the distance in the width direction X is shorter than the first end portion 24 and the second end portion 25 in the vicinity of the lateral center line Q that bisects the front-rear direction Y. And cut out.

  At both side edges 28 of the liquid-absorbing structure 5, the front and back sheets 21 and 22 extend from the liquid-absorbing core 23 to face each other, and the side flaps 30 are formed, but the liquid-absorbing core 23 has an hourglass shape. Accordingly, the area of the side flap 30 is increased in the vicinity of the horizontal center line Q. A crotch elastic member 31 extending in the front-rear direction Y along the side edges 28 is disposed between the front and back sheets 21 and 22 in an extended state. Due to the contraction of the crotch elastic member 31, both side edges 28 are in close contact with the wearer's legs, and the side flaps 30 prevent excretion such as urine from leaking between the legs and the diaper leg opening 29. (See FIG. 1).

The first and second multilayer regions 26 and 27 are formed substantially in the center with respect to the width direction X of the front and rear belt portions 6 and 7, and both side edges 8 and 9 are provided on the left and right sides of the front and rear belt portions 6 and 7. A portion where the liquid absorbing structure 5 including the portion is not joined is formed.
The length in the front-rear direction Y of the first and second multilayer regions 26 and 27 occupies about 85% of the total length from the waist side opening end 19 of the front belt portion 6 to the waist side opening end 19 of the rear belt portion 7.

The first multilayer region 26 is defined by upper and lower edges 40 and 41 that are opposed to and separated in the front-rear direction Y, and both side edges 44 that are opposed and separated in the circumferential direction R, and the second multilayer region 27 is an upper and lower portion that is opposed and separated in the front-rear direction. It is defined by the end edges 42 and 43 and both side edges 44 facing and separating in the circumferential direction R. The upper end edge 40 of the first multilayer region 26 corresponds to the first end portion 24 of the liquid absorbing structure 5, and the lower end edge 41 corresponds to the crotch side opening end 20 of the front belt portion 6. The side edges 44 correspond to the side edges 28 of the liquid absorbing structure 5. The upper end edge 42 of the second multilayer region 27 corresponds to the second end portion 25 of the liquid absorbing structure 5, and the lower end edge 43 corresponds to the crotch side opening end 20 of the rear belt portion 7. The side edges 44 correspond to the side edges 28 of the liquid absorbing structure 5.

  In the first and second multilayer regions 26 and 27, the back sheet 22 of the liquid absorbing structure 5 and the inner sheets 14 and 16 of the front and rear belt members 6 and 7 are joined at the joining portion 32 with an adhesive. The joint portions 32 are intermittently arranged in the width direction X, and a first non-joint portion 45 in which no adhesive is present is formed between the joint portions 32. As for the dimension of the width direction X of each junction part 32, it is desirable that it is 3-50 mm. When this dimension is shorter than 3 mm, sufficient adhesion cannot be obtained, and the sheet is easily peeled off. When the dimension is longer than 50 mm, a sufficient distance between the joint portions 32 cannot be obtained. A sufficient length in the width direction X cannot be ensured. As for the dimension of the width direction X of the 1st non-joining part 45, it is desirable that it is 3-15 mm. When this dimension is shorter than 3 mm, it is difficult to form a later-described air passage formed by the first non-joining portion 45, and when it is longer than 15 mm, the joining portion 32 cannot have a sufficient width.

  In the vicinity of the upper and lower end edges 40, 41 and 42, 43 of the first and second multilayer regions 26, 27, second non-joining portions 46, 47 in which no adhesive is present are formed. The second non-joining portions 46 and 47 extend over the entire width direction X of the first and second multilayer regions 26 and 27. The dimension from the upper and lower edge 40, 41, 42, 43 to the end portion in the front-rear direction Y of the joint portion 32 is about 10 mm. This dimension considers turning up and down edges 40, 41, 42, and 43, and is not limited to this value, and may be 5 mm or more and 30 mm or less.

A waist elastic member 18 is disposed over the entire region in the front-rear direction Y from the waist side opening end 19 to the crotch side opening end 20. Therefore, the waist elastic member 18 overlaps in the thickness direction over the entire area in the front-rear direction Y of the first and second multilayer regions 26 and 27. Further, since the waist elastic member 18 is disposed over the entire region in the width direction X of the left and right side edge portions 8, 9, the entire region in the width direction X of the side edges 28 of the first and second multilayer regions 26, 27. The waist elastic member 18 comes to overlap. Accordingly, the contraction force of the waist elastic member 18 acts on the entire first and second multilayer regions 26 and 27.
In the first and second multilayer regions 26 and 27, one end portion 23a and the other end portion 23b facing and separating in the front-rear direction Y of the liquid absorbent core 23 are also positioned so that the liquid absorbent core 23 has Also, the contraction force of the waist elastic member 18 is applied.

3 is a cross-sectional view taken along line III-III in FIG. Although this figure shows the front waist region 1, the configuration is the same in the rear waist region 2 and will be described simultaneously with reference to this figure. FIG. 3A shows the stretched state of the waist elastic member 18, and as shown in the figure, the waist elastic is provided between the outer sheet 15, 17 and the inner sheet 14, 16 of the front and rear belt portions 6, 7. The member 18 is joined with an adhesive (not shown). The inner surface sheets 14 and 16 and the back surface sheet 22 of the liquid absorbing structure 5 are joined together by joint portions 32 arranged intermittently. A first non-joining part 45 is formed between the joining parts 32.

FIG. 3B shows a state where the waist elastic member 18 is contracted in the direction of the arrow from FIG. When the waist elastic member 18 contracts, the front and back sheets 21 and 22 and the liquid-absorbent core 23 in the first non-joint portion 45 bend and project to the body side above the drawing, and a plurality of sheets are provided between the top sheet 21 and the body. A groove-shaped first air passage 34 is formed. A plurality of protruding top portions 38 are formed between the first air passages 34, and the top portions 38 come into contact with the wearer's body. Since the top portion 38 contacts the wearer and the groove-shaped first air passage 34 does not contact, the first air passage 34 can form a cavity with the wearer. In addition, the liquid absorbing structure 5 protrudes toward the body in the first non-joining portion 45, so that the space between the inner sheets 14, 16 of the front and rear belt portions 6 , 7 and the back sheet 22 of the liquid absorbing structure 5 is increased. A plurality of cylindrical second air passages 35 are also formed at the same time.

  FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. Although the figure shows the front waist region 1 in a worn state, the same applies to the rear waist region 2 and will be described at the same time. As illustrated, the first air passage 34 is formed along the joint portion 32, and extends from the first and second end portions 24, 25 of the first and second multilayer regions 26, 27 to the crotch side opening end 20. Extending in the height direction. Therefore, one end 34 a of the first air passage 34 faces the front and rear waist regions 1 and 2, and the other end 34 b faces the crotch region 3. The first air passage 34 can guide the vapor in the crotch region 3 to the front and rear waist regions 1 and 2 along the belly or back of the wearer 37.

FIG. 5 is a cross-sectional view taken along the line VV in FIG. 2 and is cut on the first non-joining portion 45. Although the figure shows the front waist region 1 in a worn state, the same applies to the rear waist region 2 and will be described at the same time. The second air passage 35 is formed along the first non-joining portion 45. The second air passage 35 has one end 35a facing the front and rear waist regions 1 and 2 and the other end 35b facing the crotch region 3 and the front and rear belt portions 6 and 7 via the second non-joining portions 46 and 47. From the crotch side opening end 20 to the outside of the diaper. That is, in the upper and lower end edges 40, 41 and 42, 43 of the first and second multilayer regions 26, 27, the vapor inside the diaper is guided to the second air passage 35 via the second non-joining portion 46, and the second It can discharge | release to the exterior of a diaper from the upper direction of drawing to the downward direction via the non-joining part 47. FIG.

According to the present invention, the steam in the crotch region 3 is guided to the front and rear waist regions 1 and 2 through the first air passage 34, and the steam in the front and rear waist regions 1 and 2 is exposed to the outside of the diaper through the second air passage 35. Released. Therefore, even if the excreted urine is absorbed by the liquid-absorbent core 23 and the humidity in the diaper increases with the crotch region 3 as the center, the vapor is released to the outside through the first air passage 34 and the second air passage 35. Since it can discharge | release, the wet feeling in a diaper can be reduced.
The first air passage 34 and the second air passage 35 are formed by the front and back sheets 21 and 22 and the liquid absorbent core 23 of the liquid absorbent structure, and the liquid absorbent core 23 is particularly high in rigidity compared to other sheets. Therefore, the first and second ventilation paths 34 and 35 are not easily crushed by body pressure or the like.

  In the vicinity of the upper and lower end edges 40, 41, 42, 43 of the first and second multilayer regions 26, 27, the second non-joining portions 46, over the entire width direction X of the first and second multilayer regions 26, 27, 47 is formed. By the second non-joining portions 46 and 47, the second air passages 35 can be communicated with each other. Therefore, even if a part of one end 35a or the other end 35b of the second air passage 35 is blocked by the movement of the body, it can communicate with the other second air passage 35 via the second non-joining portions 46 and 47. , Does not reduce the ventilation capacity.

In this invention, the waist elastic member is used as the waist contracting means, but other means such as an elastic sheet may be used. Further, the belt member itself may be formed of a stretchable nonwoven fabric or the like, or may be formed of a sheet combining a stretchable nonwoven fabric and a non-stretchable nonwoven fabric so that the belt member also serves as a waist contracting means.
The waist elastic member 18 is disposed over almost the entire area of the belt member 4, but may be disposed in a part thereof. However, at least a part of the first multilayer region 26 or the second multilayer region 27 with the liquid absorbing structure 5 must be applied to the liquid absorbing structure 5 so as to impart a contracting force. By applying the contraction force of the waist elastic member 18 over the entire region in the width direction X of the first and second multilayer regions 26 and 27, more air passages can be formed in the width direction. The amount of ventilation can be increased.

Although the second non-joining portion 46 is formed in the upper and lower end portions 40, 41, 42, 43 of the first and second multilayer regions 26, 27, this may not be formed. That is, the first air passage 34 and the second air passage 35 are formed over the entire area in the front-rear direction Y of the first and second multilayer regions 26, 27, and the crotch region 3 and the front and rear waist regions 1, 2 are formed in the first. You may make it communicate directly in the non-joining part 45. FIG. In the 1st ventilation path 34, the vapor | steam of the crotch area 3 can be discharge | released to the front-and-back waist areas 1 and 2, and in the 2nd ventilation path 35, the vapor | steam of the front-and-back waist areas 1 and 2 can be discharged | emitted outside the diaper. Anything is acceptable.
In the joining portion 32, the front and rear belt portions 6, 7 and the liquid absorbing structure 5 are joined using a hot melt adhesive as an adhesive, but other adhesives may be used. You may make it join by an ultrasonic wave.

FIG. 6 shows a second embodiment of the present invention, which is a plan view similar to FIG. 2, in which the first multilayer region 26 is enlarged. Since the second multilayer region 27 has the same configuration, it will be described with reference to this figure. In the second embodiment, the continuous joining portion 48 that extends in the height direction and joins the liquid absorbing structure 5 and the belt member 4, and the liquid absorbing structure 5 and the belt member 4 that extends in the height direction, And an intermittent joint portion 49 that extends in the height direction and that does not join the liquid absorbing structure 5 and the belt member 4 is arranged in the height direction . Since the configuration other than this feature is the same as that of the first embodiment, detailed description of the same configuration is omitted.

  The continuous joint portion 48 is formed in the vicinity of both side edges 44 of the first and second multilayer regions 26 and 27, and the intermittent joint portion 49 includes the continuous joint portion 48 formed on one side edge 44 and the other side. It is formed between the continuous joint portion 48 formed on the side edge 44. The intermittent joint portion 49 is divided into a first portion 49a and a second portion 49b, and the first portion 49a and the second portion 49b are separated from each other in the approximate center in the front-rear direction Y. The distance between the first portion 49a and the second portion 49b is about 5 mm, and is desirably in the range of 3 mm to 10 mm. This is because if the separation dimension is shorter than 3 mm, sufficient ventilation cannot be performed, and if it is longer than 10 mm, the bonding strength is insufficient.

By providing the intermittent joint portion 49, the first non-joint portions 45 can be communicated with each other at substantially the center in the front-rear direction Y of the first and second multilayer regions 26 and 27. That is, the second air passages 35 formed by the first non-joining portion 45 are communicated with each other at the separated portion of the intermittent joining portion 49. Therefore, even when the second air passage 35 is blocked on the upper and lower end edges 40, 41 and 42, 43 side, it communicates with the other first non-joining portion 45 at the center, and steam in the crotch region 3 Can be discharged to the outside of the diaper. Steam is not released in a part of the crotch region 3 and partial wetting can be prevented.

By forming the continuous joint portion 48 on both side edges 44, the steam is prevented from leaking outside in the width direction X, and the steam is discharged to the outside of the diaper through the second air passage 35 . . In this embodiment, the continuous joint portions 48 are formed on each side edge 44 one by one. However, the present invention is not limited to this, and there may be two or more strips as long as the steam can be prevented from leaking in the width direction X.

  In this embodiment, the continuous joint portions 48 are formed on both side edges 44, but intermittent joint portions 49 may be formed on both side edges 44 as shown in FIG. In the embodiment of FIG. 7, a plurality of continuous joint portions 48 are formed between the intermittent joint portion 49 formed on one side edge 44 and the intermittent joint portion 49 formed on the other side edge 44. Further, the continuous joint portions 48 and the intermittent joint portions 49 may be alternately formed in the width direction X. By forming the intermittent joint portion 49, the first non-joint portions 45 extending in the front-rear direction Y can be connected to each other, so that the second air passages 35 formed by the first non-joint portions 45 are joined to each other. be able to. The second air passage 35 is communicated in the width direction X, and even when the upper and lower edges 40 and 41 are blocked, the vapor can be discharged to the outside of the diaper through this communication.

  8 and 9 show a third embodiment of the present invention. FIG. 8 is a perspective view of the whole diaper in this embodiment, and FIG. 9 is an end view similar to FIG. The third embodiment is characterized in that the belt member 4 includes a plurality of air holes 36 penetrating in the thickness direction. Since the configuration other than this feature is the same as that of the first embodiment, a detailed description of the same configuration is omitted.

A plurality of vent holes 36 penetrating the inner and outer surface sheets 14 and 15 and the inner and outer surface sheets 16 and 17 of the front and rear belt portions 6 and 7 are formed. The vent hole 36 is desirably provided in the first non-joining portion 45 as shown in FIG. This is to prevent the air holes 36 from being blocked by the adhesive of the joint portion 32. The vent hole 36 preferably has a diameter of about 1 to 2 mm, and is preferably formed so as not to overlap the waist elastic member 18 disposed on the front and rear belt portions 6 and 7.
By forming the vent hole 36 in this manner, the steam guided to the second vent path 35 can be released to the outside of the diaper through the vent hole 36, and the wet feeling in the diaper can be further reduced. Can do.

  FIG. 10 shows a fourth embodiment of the present invention. In the fourth embodiment, the cover sheet 50 is attached to the first end 24 and the second end 25 of the liquid absorbing structure 5 so that the absorbent core 23 spills out between the front and back sheets 21 and 22. It is characterized by preventing. Since the other configuration is the same as that of the first embodiment, a detailed description of the configuration is omitted.

The cover sheet 50 has an air permeability of 0.113 kPa · S / m ² and is formed of an anti-perspirant sheet having antibacterial properties. The cover sheet 50 covers the first and second end portions 24 and 25 and includes the front and rear belt portions 6 and 7. The inner sheets 14 and 16 are fixed. The cover sheet 50 includes both side portions 50c facing and separating in the width direction X, and one end portion 50a and the other end portion 50b facing and separating in the front-rear direction Y. The dimension from one side 50c to the other side 50c in the width direction X is the dimension in the width direction X of the rear belt portions 6 and 7, that is, from one side edge 8, 9 to the other side edge 8, 9. It is almost equal to the dimension of.

  The one end portion 50a is entirely opposed to the inner surface sheets 14 and 16, and is bonded to the opposite surfaces by adhesion or welding. The other end portion 50b overlaps with the first or second end portions 24 and 25 in the vicinity of the center thereof, overlaps with the inner surface sheets 14 and 16 in the vicinity of both side portions 50c, and is joined by adhesion or welding. That is, the cover sheet 50 straddles the first and second end portions 24 and 25, one end portion 50 a is joined to the inner surface sheets 14 and 16, and the other end portion 50 b is joined to the surface sheet of the liquid absorbing structure 5. The first and second end portions 24 and 25 are covered by bonding to 21 and the inner surface sheets 14 and 16. Therefore, it is possible to prevent the liquid absorbent core 23 from spilling out even when the first and second end portions 24 and 25 are partially disconnected. The liquid-absorbent core 23 is composed of hydrophilic pulp, superabsorbent polymer, or the like. When these components spill out from the first and second end portions 24 and 25, the skin is stimulated. In particular, although the polymer has small particles and spills out even from a slight gap, by providing the cover sheet 50, it is possible to prevent pulp and polymer from spilling out.

According to this embodiment, one end 35a of the second air passage 35 is blocked by the cover sheet 50. However, since the air permeability of the cover sheet 50 is 0.113 kPa · S / m ² , the second air passage The ventilation of 35 is not disturbed. The air permeability is not limited to the above value, and if it is 0.15 kPa · S / m ² or less, the liquid absorbent core 23 is prevented from spilling out without impeding the ventilation of the second air passage 35. be able to.
The air permeability was measured based on the Frazier form method.

Since the dimension in the width direction X of the cover sheet 50 is equal to the dimension in the width direction X of the front and rear belt portions 6 and 7, the cover sheet 50 and the front and rear belt portions 6 and 7 are overlapped in the manufacturing process of the diaper. Can be cut at the same time. Therefore, the manufacturing process can be shortened.
Since the cover sheet 50 is a sweat-absorbing sheet having antibacterial properties, it not only prevents the liquid-absorbent core 23 from spilling, but also absorbs the sweat of the wearer and maintains a good wearing feeling. Since the cover sheet 50 is formed over the side edges 8 and 9 of the front and rear belt portions 6 and 7, the cover sheet 50 can circulate around the wearer's waist and absorb the sweat of the wearer.

The perspective view which shows the 1st Embodiment of this invention. The top view when the diaper of FIG. 1 is expand | deployed. (A) is the III-III line expanded sectional view of FIG. 2 , and shows the time when a waist contraction means exists in an expansion | extension state. (B) shows the case where the waist contractile means is in the contracted condition from Fig 3 (a). IV-IV sectional view taken on the line of FIG. VV sectional view taken on the line of FIG. The enlarged view of the 1st and 2nd multilayer area which shows 2nd Embodiment. The figure similar to FIG. 6 which shows the example of the different aspect of 2nd Embodiment. The perspective view which shows 3rd Embodiment. The figure similar to FIG.3 (b) which shows 3rd Embodiment. The top view when the diaper of 4th Embodiment is expand | deployed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Front waist area 2 Rear waist area 3 Inseam area 4 Belt member 5 Liquid absorption structure 12 Body side inner surface 13 Clothing side outer surface 18 Waist elastic member (waist contraction means)
24 1st edge part 25 2nd edge part 26 1st multilayer area 27 2nd multilayer area 32 Joining part 34 1st ventilation path 35 2nd ventilation path 45 1st non-joining part 46,47 2nd non-joining part 48 Continuous joining Part 49 Intermittent joint

Claims (9)

A height member, a front-rear direction, a circumferential direction, a body-side inner surface, a clothing-side outer surface, a belt member that forms a front waist region and a rear waist region and forms a ring in the circumferential direction, and the front-rear waist region An absorbent article having a crotch region, wherein the belt member has waist contracting means for contracting and energizing in the circumferential direction.
The liquid-absorbing structure has a first end and a second end facing and separating in the front-rear direction, and the outer surface of the first end is in the front waist region via a first multilayer region. Overlapping the inner surface of the member, the outer surface of the second end portion overlaps the inner surface of the belt member in the rear waist region through a second multilayer region,
The waist contracting means overlaps a part of at least one of the first multilayer region and the second multilayer region,
The liquid absorbing structure and the belt member are elongated in the height direction and intermittently arranged in the circumferential direction at least at a portion where the waist contracting means and the first or second multilayer region overlap. A plurality of air passages extending in the height direction are formed in the circumferential direction by connecting the crotch region and the front / rear waist region by a first non-joint portion located between the joint portions. ,
The joint extends in the height direction to join the liquid absorption structure and the belt member, and extends in the height direction to join the liquid absorption structure and the belt member. The absorbent article comprising: an intermittent joint portion that extends in the height direction and a portion that extends in the height direction and that does not join the liquid absorbing structure and the belt member . The continuous joint is formed in the vicinity of the both side edges of the first and second multilayer regions, and the intermittent joint is formed on the continuous joint formed on one side edge and on the other side edge. The absorptive article according to claim 1 formed between said formed continuous joined parts. The intermittent joint portion is formed in the vicinity of the both side edges of the first and second multilayer regions, and the continuous joint portion is formed on the intermittent joint portion formed on one of the side edges and on the other side edge of the other. The absorptive article according to claim 2 formed between said intermittent joined parts formed. A height member, a front-rear direction, a circumferential direction, a body-side inner surface, a clothing-side outer surface, a belt member that forms a front waist region and a rear waist region and forms a ring in the circumferential direction, and the front-rear waist region An absorbent article having a crotch region, wherein the belt member has waist contracting means for contracting and energizing in the circumferential direction.
The liquid-absorbing structure has a first end and a second end facing and separating in the front-rear direction, and the outer surface of the first end is in the front waist region via a first multilayer region. Overlapping the inner surface of the member, the outer surface of the second end portion overlaps the inner surface of the belt member in the rear waist region through a second multilayer region,
The waist contracting means overlaps a part of at least one of the first multilayer region and the second multilayer region,
The liquid absorbing structure and the belt member are elongated in the height direction and intermittently arranged in the circumferential direction at least at a portion where the waist contracting means and the first or second multilayer region overlap. A plurality of air passages extending in the circumferential direction are formed in the circumferential direction by connecting the crotch region and the front and rear waist regions by a first non-joining portion located between the joining portions. ,
The joint extends in the height direction to join the liquid absorption structure and the belt member, and extends in the height direction to join the liquid absorption structure and the belt member. An intermittent joint portion that extends in the height direction and a portion that extends in the height direction and does not join the liquid absorbing structure and the belt member;
The continuous joint is formed in the vicinity of the both side edges of the first and second multilayer regions, and the intermittent joint is formed on the continuous joint formed on one side edge and on the other side edge. The said absorbent article formed between the formed said continuous junction parts. A height member, a front-rear direction, a circumferential direction, a body-side inner surface, a clothing-side outer surface, a belt member that forms a front waist region and a rear waist region and forms a ring in the circumferential direction, and the front-rear waist region An absorbent article having a crotch region, wherein the belt member has waist contracting means for contracting and energizing in the circumferential direction.
The liquid-absorbing structure has a first end and a second end facing and separating in the front-rear direction, and the outer surface of the first end is in the front waist region via a first multilayer region. Overlapping the inner surface of the member, the outer surface of the second end portion overlaps the inner surface of the belt member in the rear waist region through a second multilayer region,
The waist contracting means overlaps a part of at least one of the first multilayer region and the second multilayer region,
The liquid absorbing structure and the belt member are elongated in the height direction and intermittently arranged in the circumferential direction at least at a portion where the waist contracting means and the first or second multilayer region overlap. A plurality of air passages extending in the height direction are formed in the circumferential direction by connecting the crotch region and the front / rear waist region by a first non-joint portion located between the joint portions. ,
The joint extends in the height direction to join the liquid absorption structure and the belt member, and extends in the height direction to join the liquid absorption structure and the belt member. An intermittent joint portion that extends in the height direction and a portion that extends in the height direction and does not join the liquid absorbing structure and the belt member;
The intermittent joint portion is formed in the vicinity of the both side edges of the first and second multilayer regions, and the continuous joint portion is formed on the intermittent joint portion formed on one of the side edges and on the other side edge of the other. The said absorbent article formed between the formed said intermittent junction parts. The ventilation path is formed between a first ventilation path formed between the inner surface of the liquid absorption structure and a wearer's body, and the outer surface of the liquid absorption structure and the inner surface of the belt member. The liquid-absorbent article according to any one of claims 1 to 5 , comprising a second air passage formed. The first and second multi-layer regions are defined by upper and lower end edges facing and separating in the height direction and both side edges facing and separating in the circumferential direction,
The absorptive article according to any one of claims 1 to 6 in which the 2nd non-joining part is formed in at least any one of said upper-and-lower-ends edge. The absorptive article according to any one of claims 1 to 7 in which said belt member forms a plurality of ventilation holes penetrated in the thickness direction. The liquid absorbing structure includes a top sheet positioned on the body-side inner surface, a back sheet positioned on the clothing-side outer surface, a liquid-absorbing core interposed between the front and back sheets, the first end, and The absorbent article according to any one of claims 1 to 8 , further comprising a cover sheet covering at least one of the second end portions, wherein the cover sheet has an air permeability of 0.15 kPa · S / m ² or less.

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