KR100474145B1 - Disposable wear absorbent articles - Google Patents

Abstract

The present invention relates to a wear absorbent article, such as a disposable diaper, in which a fluid stool does not flow-spread at the skin contacting surface and is settled from the skin contacting surface. The article is composed of a plurality of continuous filaments 12a in the skin contacting surface 5 of the groin region 4 of the laminated panel 1 so that the layer 12 and the filament having a high compressive elastic recovery and porosity It is arrange | positioned so that it may extend in the longitudinal direction of the laminated panel 1.

Description

Disposable wear absorbent articles

The present invention relates to a disposable wear absorbent article, and more particularly, to a disposable wear absorbent article such as a diaper which is effective in preventing diffusion and leakage of fluid excretion of an infant or a senior citizen or patient.

BACKGROUND ART Many conventional disposable diapers have been known in which openings and / or recesses or annular ridges are formed in the topsheet and / or the liquid-absorbent core to provide a receiving portion for solid excrement such as feces (for example, Utility Model Publication). 329123, 4-15921, 5-86320, 6-5614, 6-7725, 6-11722, 6-21624, 6-21626, 6-31722, 6-31723.

In the known diaper, in the case where the receiving portion of the solid excretion is formed as a hole or a recess in the liquid absorptive core, the top sheet located on the surface thereof does not have the ability to sufficiently transmit the solid excretion. No solid waste is introduced; In the case where these openings or recesses are formed together in the liquid-absorbing core and the top sheet, fluid excreta, such as so-called soft or diarrhea, once accommodated in these openings or recesses are flowed back to the surface of the top sheet in another region and diffused; In addition, in the case where the accommodation portion is formed by the raised portion, there are a number of problems that the wearer may be uncomfortable.

SUMMARY OF THE INVENTION In view of the above problems with known diapers, the object of the present invention is that fluid feces easily settle and remain from the skin contact surface, and as a result, the feces flow and diffuse from the skin contact surface to dirty or leak the wearer's skin. It's about preventing things from happening.

The present invention includes a laminated panel having a front and rear waist region, a groin area between them, a skin contact surface and a skin non-contact surface, wherein the laminated panel is located on the skin contact surface, and on the skin non-contact surface. An improved disposable wear absorbent article comprising an impermeable backsheet positioned and a liquid absorbent core disposed therebetween, wherein said groin area is provided with excrement fecal retaining means.

The improved present invention is characterized in that the holding means is composed of a continuous filament layer extending in the longitudinal direction at the upper portion of the liquid absorbent core, and the compressive elastic recovery rate of the continuous filament layer and the space between the filaments are wetted. Higher than the compressive elastic recovery rate of the topsheet and the liquid absorbent core and the porosity between their respective constituent materials, and the length portion of at least 10 mm in the longitudinal direction of each filament is not fixed to each other, so that the width of the layer between the dimensions Characterized in that it is movable in the direction.

More specifically, the present invention has the following structure, that is, the lower surface of the continuous filament layer is covered with a sheet having a basis weight and a density lower than that of the top sheet and a high liquid permeability, and the layer state is maintained. Fixed to the surface of the sheet; The continuous filament layer, along with the sheet covering the lower surface thereof, is wound inward at both sides facing each other to form a barrier against the fluidic stool; The continuous filament layer is disposed between the topsheet and the liquid-absorbing core, and an opening of at least 50 mm in length and 30 mm in width that exposes the layer is formed in the top sheet on the center region of the layer; The continuous filament layer is accommodated in at least 50 mm long and 30 mm wide concave portions formed on the upper surface of the liquid absorbent core, and an opening of at least 50 mm long and 30 mm wide is formed in an area of the top sheet covering the layer. that; The continuous filament layer is accommodated in a recess of at least 50 mm in length and 30 mm in width formed on the upper surface of the liquid absorbent core, and a plurality of openings having a diameter of 2 to 15 mm are formed in an area of the top sheet covering at least the layer. Being done; The top sheet includes a plurality of openings having a diameter of 2 to 15 mm.

Referring to the drawings, an embodiment of an article according to the present invention will be described taking an infant disposable diaper as an example.

In FIG. 1 and FIG. 2, the diaper is comprised by the laminated panel 1 which has the flat form of the vertical length. The laminated panel 1 has a front and back waist region 2 and 3, a groin region 4 between them, a skin contacting surface 5 and a non-skin contacting surface 6, and these two surfaces 5 and 6 and a width thereof. It consists of the both side edges 7 which oppose a direction, and the both edges 8 which oppose a longitudinal direction. The laminated panel 1 includes a pair of elastically shrinkable side flaps 9 opposite to the width direction, a pair of elastically shrinkable end flaps 10 opposite to the longitudinal direction, and a pair of elastically shrinkable pairs on the pair of side flaps 9. Barrier flaps 11 and a plurality of continuous filament layers 12 extending in the longitudinal direction of the groin region.

The laminated panel 1 includes a liquid-permeable topsheet 13 positioned at the skin contacting surface 5, an impermeable backsheet 14 positioned at the skin non-contacting surface 6, and a liquid-absorbing core 15 disposed therebetween. Consists of

The continuous filament layer 12 settles fluid feces, such as so-called soft stools in infants or diarrhea in patients with pathologies, in particular stool, without shedding the flow at the skin contact surface 5, further extending to the side edges 7 and / or Or it is provided as a means to hold a stool so that it may not leak from the edge 8.

The continuous filament layer 12 overlaps the upper surface of the fibrous nonwoven fabric 16 having a basis weight, a density lower than that of the top sheet 13, and a liquid permeability, and a barrier portion 17 formed by winding both sides opposite to the width direction inward. Has) The nonwoven fabric 16 is intermittently joined to the top sheet 13 by suitable bonding means. Each filament 12a between the two barrier portions 17 is embossed at predetermined intervals under heating along its longitudinal direction, so that each of the filaments 12a is loosely attached to the wearer's skin and is not peeled off. When the filaments 12a are fused to each other at the debossed portion 18, and the length dimension L between the debossed portions 18 adjacent to each other in the longitudinal direction is at least 10 mm, the fluid feces are arranged on the continuous filament layer 12. It is settled and maintained. That is, if the dimension L is 10 mm or more, the fluid feces flow into and settle between each filament 12a of the continuous filament layer 12 at this time, where each filament 12a is in the width direction of the filament layer 12. This is because it easily moves to promote the sedimentation. The dimension L is preferably 25 to 50 mm, and when it exceeds 50 mm, the filament 12a moves excessively, and the holding force on the fluid feces decreases. The continuous filament layer 12 is obtained by opening a plurality of continuous filament toes into the web, the filament 12a having a crimp, and the porosity between each filament 12a occupying 60 to 85%, Having a compression elastic recovery rate of 30% or more, preferably 50% or more is effective in achieving the desired purpose. These compressive elastic recovery rates and porosities are much higher than the compressive elastic recovery rates of the topsheet 13 and the liquid absorbent core 15 and the porosity between these constituent materials when wet. In particular, in order to obtain the required compressive elastic recovery rate under wetness, it is preferable that the filament 12a has hydrophobicity such as denier 1 to 15d polyester or the like. However, the continuous filament layer 12 may contain 30% or less of hydrophilic filaments such as rayon. Although not shown, the barrier portion 17 may be formed at both ends of the longitudinal filament layer 12 in the longitudinal direction.

3 and 4, the continuous filament layer 12 is disposed between the top sheet 13 and the liquid absorbent core 15 and at least a length of the top sheet 13 on the central region of the continuous filament layer 12. An opening 19 having a width of 50 mm and a width of 30 mm is formed, and is raised and exposed from the opening 19.

In FIG. 5, the continuous filament layer 12 is accommodated in the concave portion 20 of at least 50 mm in length and 30 mm in width formed by compression processing on the upper surface of the liquid absorbent core 15, and the continuous filament of the top sheet 13 In the area | region which coat | covers the layer 12, the opening part 19 of at least 50 mm in length and 30 mm in width is formed. However, instead of the top sheet 13 having the opening 19, a top sheet 13 having a plurality of openings 21 may be used.

Needless to say, the above-described continuous filament layer 12 and the opening 19 are widened to the periphery of at least the region facing the anus when the diaper is worn, and the fluid feces directly into the continuous filament layer 12. It is designed to be excreted.

The topsheet 13 is preferably made of a fiber nonwoven fabric and has a plurality of openings 21. As this nonwoven fabric, in consideration of delicate skin of an infant, a nonwoven fabric of a melt blow, which is a particularly fine fiber, other than chemical bonds, namely melt blow, span lace, needle punch, heat bond, and span bond, is preferable. As the nonwoven fabric, those made of hydrophobic and / or hydrophilic fibers are used. However, in order not to give an unpleasant wet feeling to the skin, it is preferable that the nonwoven fabric is made of at least 70% by weight of hydrophobic fibers. In order for the aperture 21 to permeate a fluid feces, it is preferable that a diameter is 2-15 mm and a porosity is 40 to 80%. As the opening 21, in addition to being flat as shown in the example, a guide tube 0.3 to 3 mm long may be extended from the lower surface thereof. Also in the top sheet 13 having the large opening 19, the one having the small opening 21 is preferable as a countermeasure in the case where the excretion portion is separated from the opening 19 with the large opening portion 19 to the small opening 21 region.

1 and 2 again, each side flap 9 has the function of preventing leakage of excretion from around the wearer's leg and extending outwardly from the side edge of the liquid absorbent core 15. ) And the outer portion 11a of the barrier flap 11 located on the upper surface thereof are formed by joining each other by suitable bonding means, and elastically shrinkage in the longitudinal direction of the laminated panel 1 between the portions 14a and 11a. As many plural thread-like parallel elastic members 22 as possible are attached by suitable bonding means.

Each barrier flap 11 has a function of confining the fluidic stool in the area between these barrier flaps, and extends outwardly from the outer portion 11a and the liquid absorbent core 15 to the inner portion 11b folded inward. In the bent portion, a plurality of thread-like parallel elastic members 23 elastically shrinkable in the longitudinal direction of the laminated panel 1 are attached by suitable bonding means. Each barrier flap 11 bends outward from the width direction middle of the inner part 11b under extension | stretching of the elastic member 23, and in that state, the both ends 11c are suitable for the longitudinal direction of the laminated panel 1 to adhere | attach. It is fixed to the outer part 11a by a means. In addition, the inner portion 11b is joined to the extended portion 13a of the top sheet by suitable bonding means in the portion 24. Therefore, the inner part 11b has the tendency to stand by the contracting force of the elastic member 23. As shown in FIG. Originally, the inner part 11b may be fixed to the skin contact surface 5 of the laminated panel 1 whose inner surface opposes without turning to the outer side as mentioned above.

Each end flap 10 has a function of keeping the diaper around the waist of the wearer and at the same time preventing leakage of excrement from the waist, and extending outwardly from the end edge of the liquid absorbent core 15. ) And the extending portion 13b of the top sheet 13 are joined to each other by suitable bonding means through the elastic member 25 on the upper surface thereof. The elastic member 25 is made of a relatively wide sponge tape, and is attached between the portions 13b and 14b in a state capable of elastic shrinkage in the longitudinal direction thereof. The elastic member 25 is preferably an open cell type polyurethane foam in terms of breathability and flexibility, and is also suitable for contacting the waist opening of the diaper so that the waist circumference of the low-month-old infant is not too tight. It goes without saying that the elastic member 25 having such characteristics may be used as the elastic members 22 and 23 of the side flaps and the barrier flaps.

As the topsheet 13, in addition to the nonwoven fabric described above, a plastic film having a plurality of openings known as surface materials of articles of this kind is also used. As the backsheet 14, a moisture-permeable plastic film or a laminate sheet of this and a fiber nonwoven fabric is used. The side flaps and the end flaps 9, 10 are understood to have a high degree of flexibility because they are formed from such nonwoven fabrics or plastic films. As the liquid absorbent core 15, a mixture obtained by pulverizing a mixture of flap pulp and superabsorbent polymer particles mainly obtained by pulverizing a wood pulp sheet into a panel having a suitable thickness, and coating it with liquid-diffusing tissue paper can be used. have. Therefore, since the core 15 has semi-rigidity, the shape of the core 15 is not collapsed in a normal wearing state. Incidentally, as the super absorbent polymer, those known in the art as absorbent materials for sanitary napkins and disposable diapers, such as starch graft polymers, cellulose modified substances, crosslinked products of water-soluble polymers, and self-crosslinked acrylic acid alkali metal salt polymers, are mentioned. Can be.

As for the diaper which is the laminated panel 1 which has the said structure, the free sheet | seat of the well-known pressure-sensitive adhesive tape 26 attached to both sides of the back waist area 3 has the backsheet 14 of the front waist area 2 ) Is assembled by peeling to the outer surface. Although such a diaper is generally referred to as an open type, the diaper according to the present invention can be applied not only to this open type but also to a pants type (pull-up type) in which both edges of the front and rear waist region are connected in advance.

In addition, although not mentioned above about the adhesion state and means of each structural member, these are clear to those skilled in the art, For example, a hot melt adhesive or a heating or ultrasonic welding is mentioned as an adhesion means.

In the article according to the present invention, in the case of the continuous filament layer, the porosity between the filaments is higher than the porosity between the topsheet or the constituent material of the liquid-absorbent core, and each filament is easy to move in the width direction, so that the fluid feces It easily flows between the filaments and remains sedimented from the surface of the continuous filament layer, resulting in flow diffusion from the skin contact surface and no stool leaking from the side edges or end edges of the article. In addition, since the continuous filament layer has a high compressive elastic recovery rate under wetness, the porosity remains unchanged even when wet with excretion liquid, and gives a good feeling to the wearer according to its flexibility and breathability (claim 1).

When the continuous filament layer is installed on the surface of the top sheet through the liquid permeable sheet, the barrier portion for the fluidic stool is formed on both sides or both ends of the continuous filament layer, thereby more effectively preventing the flow diffusion of the fluid stool. (Claims 2 and 3).

When the continuous filament layer is exposed from the opening formed in the top sheet between the top sheet and the liquid absorbent core, it is easy to fix the continuous filament layer to the laminated panel so that it can be easily seen. It is possible to prevent the arrangement of the filaments from collapsing unintentionally by contact with the wearer's skin (claim 4).

When the continuous filament layer is accommodated in the recess formed in the liquid absorptive core, it is possible to effectively prevent the flow of feces flowing into the continuous filament layer from flowing out of the region of the recess (claims 5 and 5). Article 6).

When the topsheet has a plurality of openings, it is not necessary to install an opening which is considerably larger than the opening because the fluid stool penetrates the opening (claim 7).

1 is an exploded perspective view of a disposable diaper with a part cut away;

2 is an enlarged cross-sectional perspective view taken along the line A-A of FIG.

3 is a perspective view showing a second embodiment of the continuous filament layer.

4 is an enlarged cross-sectional view taken along the line B-B in FIG.

5 is a perspective view showing a second embodiment of the continuous filament layer and another embodiment of the top sheet;

<Explanation of symbols for main parts of drawing>

1: laminated panel

2: front waist area

3: back waist area

4: groin area

5: skin contact surface

6: non-contact skin

12: continuous filament layer

12a: continuous filament

13: topsheet

14: backsheet

15: liquid absorbent core

16: liquid permeable sheet

17: barrier

18: fixing part

19: opening

20: concave

21: opening

Claims (7)

A laminated panel having a front and rear waist region, a groin area between them, a skin contact surface, and a non-contact surface, wherein the laminated panel is a liquid-permeable top sheet positioned at the skin contact surface, and an impervious bag positioned at the skin non-contact surface. In the disposable wear-absorbent article comprising a sheet and a liquid absorbent core disposed therebetween, wherein the holding means for excretion feces is provided in the groin area. The holding means is composed of a continuous filament layer extending in the longitudinal direction at the top of the liquid absorbent core, and the compressive elastic recovery rate under the wet of the continuous filament layer and the porosity between the respective filaments are the topsheet and the moisture absorption under the wet. It is higher than the compressive elastic recovery rate of the liquid core and the porosity between the respective constituent materials, and each filament is not fixed to each other at least 10 mm in the length direction thereof, so that the length portion is movable in the width direction of the layer. Item characterized by. 2. The continuous filament layer according to claim 1, wherein the bottom surface of the layer is covered by a sheet having a basis weight, a density lower than that of the top sheet, and a liquid permeability, and the layer state is maintained. An article characterized in that it is fixed. The article as set forth in claim 2, wherein said continuous filament layer covers said bottom surface with said sheet and is formed with a barrier portion against fluid stool by being rolled inward on both sides facing each other. The said continuous filament layer is arrange | positioned between the said top sheet and the said liquid absorptive core, The said top sheet on the center area | region of the said layer is formed with the opening of at least 50 mm in width 30 mm which exposes the said layer. Article characterized in that. 2. The region of claim 1, wherein the continuous filament layer is accommodated in a recess of at least 50 mm in length and 30 mm in width formed on the upper surface of the liquid absorbent core, and is at least 50 mm in length and 30 mm in width in the area covering the layer of the topsheet. An article formed with an opening. 2. A region having a diameter of 2 to 15 mm according to claim 1, wherein the continuous filament layer is accommodated in a recess of at least 50 mm in length and 30 mm in width formed on an upper surface of the liquid absorbent core and covers at least the layer of the top sheet. An article characterized by having two openings. The article according to any one of claims 1 to 3, wherein a plurality of openings having a diameter of 2 to 15 mm are formed in the top sheet.

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