CN116209415A

CN116209415A - Pants-type absorbent article

Info

Publication number: CN116209415A
Application number: CN202180062486.XA
Authority: CN
Inventors: 川口宏子; 中尾佑马
Original assignee: Kao Corp
Current assignee: Kao Corp
Priority date: 2020-09-30
Filing date: 2021-09-06
Publication date: 2023-06-02
Also published as: WO2022070793A1; JP2022057123A

Abstract

The invention provides a shorts type absorbent article, which comprises an absorbent main body, an outer cover and a disposal tape. The disposal tape has a fixing portion fixed to an outer surface of the outer body, and an extension portion arranged on the fixing portion in a peelable manner. The absorbent main body has a pair of leakage-preventing cuffs, each including a cuff stretch portion extending in a longitudinal direction. The distance in the longitudinal direction between the lower end portion of the fixing portion longitudinally below and the open end of the waist opening portion is equal to or greater than the distance in the longitudinal direction between the end portion of the burring stretch portion and the open end.

Description

Pants-type absorbent article

Technical Field

The present invention relates to a pants-type absorbent article having a disposal tape.

Background

Among pants-type absorbent articles such as disposable diapers, there is known an absorbent article having a disposal tape wound around an absorbent article in a shape rolled up in the longitudinal direction so as to be able to maintain the shape, from the viewpoint of facilitating and sanitary disposal of the absorbent article after use. The disposal tape needs to have a length that can be sufficiently wound around the absorbent article even when the volume of the tape increases due to excrement. From such a point of view, patent document 1 describes an absorbent article characterized in that a fastening tape (disposal tape) in the form of a thin tape for fastening at the time of disposal of the absorbent article is provided on the surface of the top sheet or the back sheet, and at least a part of the fastening tape in the longitudinal direction thereof is extensible.

Prior art literature

Patent literature

Patent document 1: japanese patent laid-open No. 9-99010

Disclosure of Invention

The pants-type absorbent article according to one embodiment of the present invention has a waist opening and a pair of leg openings, and has a longitudinal direction extending from the abdomen side to the back side of the wearer through the crotch, and a transverse direction orthogonal to the longitudinal direction, and is divided into an abdomen side region, a crotch region, and a back side region along the longitudinal direction.

The pants-type absorbent article further comprises:

an absorbent body comprising an absorbent body;

an outer body comprising an outer surface and disposed on a non-skin-facing side of the absorbent body; and

a disposal tape disposed in the abdomen-side region or the back-side region so as to overlap the absorbent body in a plan view.

The disposal tape includes:

a fixing portion extending in the longitudinal direction and fixed to the outer surface of the outer body; and

an extensible extension portion including a first end portion connected to the fixing portion, extending in the longitudinal direction, and being arranged in a peelable manner on the fixing portion.

The absorbent main body has a pair of leakage preventing cuffs disposed on both lateral sides, the pair of leakage preventing cuffs each including a stretchable cuff extension extending in the longitudinal direction.

The distance in the longitudinal direction between the lower end portion of the fixing portion and the opening end of the waist opening portion is equal to or greater than the distance in the longitudinal direction between the end portion of the burring expansion portion and the opening end.

Drawings

Fig. 1 is a perspective view of a pant-type absorbent article according to an embodiment of the present invention.

Fig. 2 is a schematic plan view showing the skin-facing surface side of the pants-type absorbent article, and is a view showing a state in which the pants-type absorbent article is stretched and the elastic members of the respective portions are stretched and expanded into a planar shape.

Fig. 3 is an enlarged cross-sectional view of the disposal tape of the pants-type absorbent article.

Fig. 4 is a schematic plan view showing a state in which the back side region and the abdomen side region of the pants-type absorbent article are overlapped, and the longitudinal middle portion of the crotch region is bent.

Fig. 5 is a view showing a state in which a waste tape of a pants-type absorbent article rolled into a roll is stretched by a waste person when discarding the pants-type absorbent article.

Fig. 6 is a view showing the pants-type absorbent article in a rolled shape around which a disposal tape is wound.

Fig. 7 is an enlarged schematic cross-sectional view of fig. 2.

Detailed Description

The disposal tape described in patent document 1 is required to be sufficiently elongated from the viewpoint of reliably maintaining the state in which the absorbent article is rolled up. On the other hand, when an excessive tensile force is applied to elongate the disposal tape, the disposal tape is plastically deformed and may be broken.

The present invention relates to the provision of a pants-type absorbent article that can be smoothly and reliably discarded using a disposal tape.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

[ integral Structure of pants-type Disposable diaper ]

Fig. 1 and 2 show a pants-type disposable diaper 1 as an embodiment of the pants-type absorbent article of the present invention. Hereinafter, the pants-type disposable diaper 1 is referred to as a diaper 1.

As shown in fig. 1, the diaper 1 has a waist opening 1W and a pair of leg openings IL, and is worn on the lower abdomen and crotch of a wearer when worn. The waist opening 1W has an opening end 50. The diaper 1 has a longitudinal direction X, a transverse direction Y and a thickness direction Z. The longitudinal direction X extends from the abdomen side of the wearer through the crotch portion to the back side. The lateral direction Y is orthogonal to the longitudinal direction X and corresponds to the left-right direction of the wearer. The thickness direction Z is orthogonal to the longitudinal direction X and the transverse direction Y.

In the present specification, "above" in the longitudinal direction X means a direction toward the open end 50 of the waist opening 1W, and "below" in the longitudinal direction X means a direction toward the intermediate portion in the longitudinal direction X of the crotch region C described later. That is, "above the longitudinal direction X" and "below the longitudinal direction X" correspond to the up-down direction of the wearer in the worn state.

In the present specification, the thickness direction Z may be referred to as the skin side when worn, and the side closer to the skin of the wearer may be referred to as the non-skin side when worn. The "skin-facing surface" refers to a surface of the diaper 1 or its constituent members that faces the skin side of the wearer when the diaper 1 is worn, that is, a surface that is relatively close to the skin of the wearer. The "non-skin-facing surface" refers to a surface of the diaper 1 or its constituent members on the opposite side (clothing side) to the skin side of the surface when the diaper 1 is worn, that is, a surface relatively distant from the skin of the wearer.

"when worn" means a state in which a proper wearing position generally envisaged is maintained.

The diaper 1 is divided into a abdomen-side region a disposed on the abdomen side of the wearer when worn, a back-side region B disposed on the back side of the wearer when worn, and a crotch region C disposed between the abdomen-side region a and the back-side region B and disposed in the crotch of the wearer when worn. The abdomen-side region a, crotch region C, and back-side region B are arranged along the longitudinal direction X. The side edges A1, B1 of the abdomen-side region a and the back-side region B in the lateral direction Y are joined to each other to form a waist opening 1W. A leg curl is formed in the crotch region C, and the leg curl forms a leg opening 1L.

Fig. 2 shows a configuration in which the diaper 1 is developed, and the elastic members of the respective portions are stretched to be developed in a planar shape. This state is also referred to as "developed and extended state" of the diaper 1. Unfolding the diaper 1 means that the side edges A1 and B1 of the abdomen-side region a and the back-side region B are separated and unfolded.

The diaper 1 includes a front sheet 2, a back sheet (not shown), an absorbent body 4 having an absorber 40, and an outer body 5 disposed on the non-skin-facing side of the absorbent body 4.

The outer body 5 includes an outer surface 5a which is a non-skin-facing surface of the diaper 1.

The absorbent body 4 has a structure in which a back sheet, an absorber 40, and a front sheet 2 are laminated in the thickness direction Z. The absorber 40 extends in the crotch region C in the longitudinal direction X to a part of the abdominal region a and the back region B. The absorbent body 40 may include a liquid-retentive absorbent core, and may include a core wrap covering the absorbent core.

The materials used as the constituent members of the diaper 1 such as the back sheet, the absorber 40, the front sheet 2, and the leak-proof cuffs described later, and the outer case 5, which are included in the absorbent main body 4, can be used without any particular limitation.

The diaper 1 may further include a waist elastic member 22 and a waist elastic member 23 provided in the abdomen-side region a or the back-side region B for forming waist wrinkles. The waist elastic member 22 and the waist elastic member 23 are linear or belt-shaped elastic members that are stretchable in the lateral direction Y. By these

elastic members

22, 23, the diaper 1 is fitted to the body of the wearer, the wearing feeling of the diaper 1 is improved, and leakage of excrement can be effectively prevented.

[ Structure of leakage-proof turned-over edge ]

As shown in fig. 2, the absorbent main body 4 further includes a pair of leakage preventing cuffs 6 disposed on both sides in the lateral direction Y and configured to be stretchable in the longitudinal direction X. The leakage preventing cuffs 6 extend in the longitudinal direction X in the crotch region C to the ventral region a and the dorsal region B.

The leakage preventing cuff 6 has a cuff forming sheet 61 and a cuff expansion and contraction portion 62.

The burring-forming sheet 61 is formed of a sheet having functions such as liquid impermeability, water vapor permeability, and water repellency. The burring-forming sheet 61 includes a root portion (not shown) and a free end portion 61a, each extending in the longitudinal direction X. The root portion is joined to other components such as the front sheet 2 and the exterior body 5. The free end portion 61a is disposed on the side of the root portion in the lateral direction Y at the center portion, and most of it is not joined to other components such as the front sheet 2. The top end portion side in the longitudinal direction X of the cuff forming sheet 61 is joined to a member (for example, the front sheet 2) constituting the skin-facing surface side of the absorbent main body 4, the outer body 5 folded back from the waist opening 1W, or the like by heat sealing, an adhesive, or the like.

The burring-stretching portion 62 is configured to be extendable and retractable in the longitudinal direction X. The "cuff expansion and contraction portion 62 extends in the longitudinal direction X" means that an elastic member described later extends from the abdominal region a side to the back region B side as a whole, and includes a form in which a part of the cuff expansion and contraction portion 62 is bent or the like.

The burring expansion and contraction portion 62 is formed of a linear or belt-like elastic member (e.g., a rubber wire or the like). The elastic member of the burring-extending and contracting portion 62 is disposed, for example, in the folded portion formed by folding back the free end portion 61a of the burring-forming sheet 61. The elastic member is attached to the burring sheet 61 in a state stretched into a planar shape in a state stretched in the longitudinal direction X. Thus, when worn, the cuff expansion and contraction portion 62 contracts in the longitudinal direction X, and the free end portion 61a is separated from the front sheet 2 in the thickness direction Z, thereby realizing the leakage preventing cuff 6 standing up toward the skin side. Each cuff expansion portion 62 has 1 or more elastic members, and in the example shown in fig. 2 and the like, has 2 elastic members.

The end 62a of the burring-extending and contracting portion 62 in the longitudinal direction X is an end of the stretchable region of the elastic member. That is, when the end portion of the elastic member is joined to the burring sheet 61 in a state in which the elastic member is not stretched, the end portion 62a of the burring stretch unit 62 is defined as the uppermost portion of the elastic member in the longitudinal direction X except for the non-stretch portion. Specifically, the end portion 62a of the cuff expansion and contraction portion 62 is defined as a boundary portion between a wrinkled portion and a non-wrinkled portion of the elastic member when the leakage preventing cuff 6 of the diaper 1 in which the elastic member is not stretched is visually confirmed. Each of the cuff expansion and contraction portions 62 has an end portion 62a in the case of a plurality of elastic members, and the boundary portion located at the uppermost side in the longitudinal direction X of the boundary portions of the plurality of elastic members is used.

The end portion 62a is provided in 2 pieces on the abdomen side region a side and the back side region B side, respectively, for each of the left and right cuff expansion and contraction portions 62, and is provided at 4 pieces in total.

[ Structure of waste tape ]

As shown in fig. 1 and 2, the diaper 1 further includes a disposal tape 10 disposed in the abdomen-side area a or the back-side area B so as to overlap with the absorbent body 4 in a plan view. In the present specification, "plan view" refers to a plan view of the diaper 1 in an extended and stretched state as seen in the thickness direction Z. The "overlap of the disposal tape 10 and the absorbent body 4 in plan view" includes a case where a part of the disposal tape 10 overlaps the absorbent body 4 in plan view.

In the example shown in these drawings, the disposal tape 10 is disposed in the back side region B. The disposal tape 10 is fixed to the outer surface 5a of the exterior body 5 as described later.

In the example shown in fig. 2, the disposal tape 10 is disposed on a center line CL along the longitudinal direction X that bisects the diaper 1 in the lateral direction Y.

As shown in fig. 3, the disposal tape 10 has a fixing portion 11 and an extension portion 12.

The fixing portion 11 extends in the longitudinal direction X and is fixed to the outer surface 5a of the outer body 5.

The extension portion 12 includes a first end portion (for example, an upper end portion 12a described later) connected to the fixing portion 11, and is arranged on the fixing portion 11 so as to be capable of being peeled off. The extension 12 extends in the longitudinal direction X, and is configured to be extendable as described later.

The constituent members of the disposal tape 10 "extend in the longitudinal direction X" means that the longitudinal direction X1 of the constituent members of the disposal tape 10 is parallel to the longitudinal direction X or at an angle of 20 degrees or less. The longitudinal direction X1 is preferably parallel to the longitudinal direction X as shown in fig. 3, from the viewpoint of easy development and extension by the waste of the diaper 1.

In the present embodiment, the disposal tape 10 has a second end portion (for example, a lower end portion 12b described later) connected to the extension portion 12, and a non-stretchable fastening portion 13 arranged on the extension portion 12 so as to be able to be peeled off.

The disposal tape 10 shown in fig. 3 is configured such that the fixing portion 11, the extension portion 12, and the fixing portion 13 are laminated in this order in the thickness direction Z, and when developed, become a long tape in which the fixing portion 11, the extension portion 12, and the fixing portion 13 are arranged in this order. The term "unwinding the disposal tape 10" means that the extension portion 12 is peeled off from the fixed portion 11, and the fixed portion 13 is peeled off from the extension portion 12.

The fixing portion 11 includes an upper end portion 11a located above the longitudinal direction X, and a lower end portion 11b located below the longitudinal direction X on the opposite side thereof.

The extension 12 includes an upper end 12a located above the longitudinal direction X, and a lower end 12b located below the longitudinal direction X on the opposite side thereof. In the present embodiment, the upper end portion 12a constitutes a first end portion of the extension portion 12, and the lower end portion 12b constitutes a second end portion of the extension portion 12.

The fixed portion 13 includes an upper end portion 13a located above the longitudinal direction X, and a lower end portion 13b located below the longitudinal direction X on the opposite side thereof.

The

upper end portions

11a, 12a, 13a are the uppermost portions in the longitudinal direction X of the fixing portion 11, the extension portion 12, and the fixing portion 13, and the

lower end portions

11b, 12b, 13b are the lowermost portions in the longitudinal direction X of the fixing portion 11, the extension portion 12, and the fixing portion 13.

As shown in fig. 3, the upper end 11a side of the fixing portion 11 is folded back toward the extension portion 12 side (non-skin side), for example, and a folded-back portion is formed. The upper end 11a of the fixing portion 11 is connected to the upper end 12a of the extension portion 12 by the folded portion.

The portion of the extension 12 on the lower end 12b side is folded back toward the fastening portion 13 side (non-skin side), for example, and a folded back portion is formed. The lower end 12b of the extension 12 is connected to the lower end 13b of the fastening portion 13 by the folded portion.

As described above, the disposal tape 10 shown in fig. 3 has a structure in which the fixing portion 11, the extension portion 12, and the fastening portion 13 are tri-folded in a zigzag shape.

The fixing portion 11 includes, for example, a fixing portion sheet 14 including a first surface 14a and a second surface 14b, and a fixing portion adhesive portion 15 disposed on the second surface 14 b.

The fixing portion sheet 14 is formed of a strip-shaped sheet extending in the longitudinal direction X. As the fixing portion sheet 14, for example, a resin sheet (plastic sheet, film, or the like), a nonwoven fabric, a woven fabric, or the like, which has been conventionally used, can be used without particular limitation. Even when the fixing portion sheet 14 is stretchable, it is fixed to the outer surface 5a, and therefore, the stretchability thereof cannot be exhibited.

The fixing portion adhesive portion 15 fixes the fixing portion sheet 14 to the outer surface 5a. The disposal tape 10 is non-detachably fixed to the outer surface 5a of the diaper 1 by the fixing portion adhesive portion 15. The fixing portion adhesive portion 15 is formed of a known adhesive such as a hot melt adhesive.

The extension 12 includes an extension sheet 16 including a first surface 16a and a second surface 16b, and an extension adhesive portion 17 disposed on the second surface 16 b.

The sheet 16 for extension portion is constituted by a strip-like stretchable sheet extending in the longitudinal direction X. The extension piece 16 may have the same size as the fixing piece 14 or may have a different size.

The extension adhesive portion 17 is a member for releasably joining the extension sheet 16 to the first surface 14a of the fixing portion 11 in the above-described stacked state of the disposal tape 10. Accordingly, the extension-use adhesive portion 17 is preferably formed of an adhesive having weak adhesion.

The extension portion 12 is configured to be extendable in the longitudinal direction X1 when a tensile force is applied to the disposal tape 10. Specifically, the stress at the start of extension of the extension portion 12 is preferably 5.0N or less, and more preferably 3.0N or less.

As such an extension sheet 16, for example, an extensible film can be used. Examples of the film include a single-layer film and a multilayer film such as a coextruded film. As a material constituting the stretchable film, for example, a resin film formed by melt-extruding a polyolefin resin such as linear low density polyethylene is preferable. As the polyolefin-based resin, polypropylene homopolymer can be exemplified; polypropylene copolymers such as block copolymers, random copolymers and random block copolymers of polypropylene and polyethylene; a mixture of the polypropylene homopolymer and the polypropylene copolymer; polyethylene such as high density polyethylene, low density polyethylene, linear low density polyethylene, etc.; other than the mixture of the polyethylene and the polypropylene homopolymer and/or the polypropylene copolymer, various thermoplastic elastomers such as olefins, polyesters, polyamides, and styrenes may be mixed with the mixture. In addition, at least 1 material selected from the group consisting of polyvinyl chloride, ethylene-vinyl acetate copolymer and polyvinyl alcohol may be used in addition to the polyolefin-based resin.

The fastening portion 13 is configured to be capable of fastening to the outer surface 5a of the diaper 1 in a state where the disposal tape 10 is spread out at the time of disposal of the diaper 1.

The fastening portion 13 includes a fastening portion sheet 18 including a first surface 18a and a second surface 18b, and a fastening portion adhesive portion 19 disposed on the second surface 18 b.

The fastening portion sheet 18 is formed of a belt-like non-stretchable sheet extending in the longitudinal direction X. The fixing portion sheet 18 may have the same size as the fixing portion sheet 14 or the extension portion sheet 16, or may have a different size.

The fixing portion adhesive portion 19 is a member capable of detachably joining the fixing portion sheet 18 to the first surface 16a of the extension portion 12 in the laminated state of the disposal tape 10, and fixing the fixing portion 13 to an arbitrary position on the outer surface 5a of the diaper 1. The degree of adhesiveness of the fixing portion adhesive portion 19 is preferably determined from such a viewpoint.

The fastening portion 13 is non-stretchable. "non-stretchability" means that extensibility is not exhibited in the longitudinal direction X1 or extensibility is very low compared to the extension 12. Specifically, the stress at the start of plastic deformation of the fixing portion 13 is preferably 30N or less, and more preferably 25N or less. As such a fixing portion sheet 18, for example, a resin sheet (plastic sheet, film, or the like), a nonwoven fabric, a woven fabric, or other known materials used in the related art can be used without particular limitation. The method of measuring the stress at the start of plastic deformation of the fastening portion 13 will be described later.

Further, the disposal tape 10 shown in fig. 3 has a grip portion 20 joined to the upper end portion 13a of the fixed portion 13. The grip portion 20 is a portion for gripping by a waste person of the diaper 1 when the disposal tape 10 is unfolded and elongated. The grip portion 20 typically has no adhesiveness from the viewpoint of easy gripping. The grip portion 20 is formed of, for example, a piece that is connected to the second surface 18b of the fixing portion piece 18 and is separate from the fixing portion piece 18.

[ action at diaper disposal and disposal form of diaper ]

A typical operation when the disposal diaper 1 is disposed of using the disposal tape 10 having the above-described structure will be described.

First, as shown in fig. 4, the diaper 1 after use is formed in a state in which the abdomen-side region a and the back-side region B are overlapped with the skin-facing surface facing inward. At this time, the crotch region C is bent at the middle portion in the longitudinal direction X, and the open ends 50 of the waist opening 1W of the abdomen-side region a and the back-side region B overlap. This form is also referred to as a "fold-in-half form" of the diaper 1. The side edges A1 and B1 of the ventral region a and the dorsal region B may be separated or not separated.

Next, the diaper 1 is rolled up from the crotch region C toward the waist opening 1W so that the side (for example, the abdomen-side region a) on which the disposal tape 10 is not disposed is positioned inward. Then, the waist opening 1W on the side (for example, the back side region B) on which the disposal tape 10 is disposed is covered on the outer surface 5a of the rolled sheet.

Next, as shown in fig. 5, the grip portion 20 of the disposal tape 10 is gripped with fingers, and the disposal tape 10 is stretched in the longitudinal direction X1 of the disposal tape 10, so that the disposal tape 10 is stretched from the stacked state to the tape-like state. Further, by stretching the grip portion 20 in the longitudinal direction X1, the extension portion 12 starts to extend.

Next, the elongated disposal tape 10 is wound around the outer surface 5a of the diaper 1 in a rolled state. The fastening portion 13 is fastened to an arbitrary position on the outer surface 5a of the diaper 1.

This results in the disposal form of the diaper 1 shown in fig. 6.

In the present embodiment, the position of the disposal tape 10 is defined in relation to the leakage preventing cuff 6 in the following manner, and the expansion of the disposal tape 10 is assisted by the expansion of the leakage preventing cuff 6 during the disposal operation, so that the disposal operation can be performed more smoothly and reliably.

[ positional relationship between waste Belt and leakage-proof turned edge ]

As shown in an enlarged view of fig. 7, a distance D1 in the longitudinal direction X between the lower end 11b of the fixing portion 11 of the disposal tape 10 and the open end 50 of the waist opening 1W is equal to or greater than a distance D2 in the longitudinal direction X between the end 62a of the cuff expansion and contraction portion 62 and the open end 50. That is, at least a part of the fixing portion 11 is arranged so as to overlap the burring and telescoping portion 62 in the longitudinal direction X in a plan view. The distances D1, D2 are the distances measured in the extended configuration shown in fig. 2 and 7.

The distance D1 may be a smaller distance D2 or more of the distance D2 between the end 62a located on the abdominal side region a side and the open end 50 and the distance D2 between the end 62a located on the back side region B side and the open end 50. In particular, from the viewpoint of effectively exhibiting the operation and effect described later, the distance D1 is preferably equal to or greater than the distance D2 between the opening end 50 and the end 62a of the back side region B or the abdominal side region a where the disposal tape 10 is disposed, as shown in fig. 7.

By disposing the disposal tape 10 in this manner, the distance between the lower end 11b of the fixing portion 11 and the end 62a of the burring and telescoping portion 62 becomes shorter. Accordingly, when the disposal tape 10 is stretched for disposal of the diaper 1 (absorbent article), the stretching force is liable to act on the cuff extension portion 62 of the leakage preventing cuff 6. That is, the disposal tape 10 is stretched by the stretching force, and the flange stretching portion 62 of the leakage preventing flange 6 can be stretched. The burring expansion and contraction portion 62 can be formed of an elastic member such as a rubber wire that can be easily stretched. With this structure, the waste of the diaper 1 (absorbent article) can obtain a feeling of smoothly extending the waste belt 10 with a small load.

Further, the leakage preventing cuff 6 is also stretched by the tensile force, and therefore, the stretching of the leakage preventing cuff 6 consumes the energy of the tensile force, and the extension portion 12 can be prevented from being excessively stretched. Further, the user can obtain a feeling of easy extension, and the user is less likely to apply excessive tension to the disposal tape 10, thereby preventing excessive extension of the extension portion 12. This reduces the risk of the extension portion 12 extending to plastic deformation, and suppresses breakage associated with a decrease in strength of the disposal tape 10.

As described above, according to the diaper 1 (absorbent article) of the present embodiment, the extension of the extension portion 12 can be assisted by the extension of the leakage preventing cuff 6, the waste tape 10 can be perceived as being easily extended, and the breakage of the waste tape 10 can be suppressed. This allows the diapers 1 (absorbent articles) to be smoothly discarded by the disposal tape 10, and the above-described discarded shapes of the diapers 1 (absorbent articles) to be reliably formed.

Further, since it is not easy for the waste of the diaper 1 to apply excessive tensile force to the disposal tape 10, the risk of the fixing portion 11 being detached from the outer surface 5a can be reduced. Further, the amount of the adhesive used for the fixing portion adhesive portion 15 of the fixing portion 11 can be limited, and discomfort and the like caused by the fixing portion 11 during wearing can be suppressed.

In addition, in the case of defecation or the like, the side edges A1 and B1 of the abdomen side region a and the back side region B may be separated, and then the diaper 1 may be rolled into a roll and discarded. In this case, the tensile force applied to the disposal tape 10 can more directly act on the region (the back side region B or the abdominal side region a) where the disposal tape 10 is disposed. Therefore, when the distance D1 is equal to or greater than the distance D2 between the end 62a of the back side region B or the abdomen side region a where the disposal tape 10 is disposed and the open end 50, the stretch force is easily transmitted by the burring stretch unit 62 by separating the side edges A1 and B1 of the abdomen side region a and the back side region B. This makes it easier to extend the burring expansion and contraction portion 62, and the above-described operational effects can be obtained more reliably.

[ extensibility of Flanging Telescopic portion ]

In order to more reliably obtain the effect of assisting the extension of the disposal tape 10, the extensibility of the burring-extending/contracting portion 62 is preferably defined by a relationship with the extensibility of the disposal tape 10.

First, a case where a load in the longitudinal direction X1 is applied to the disposal tape 10 will be described.

When a load in the longitudinal direction X1 is applied to the disposal tape 10, first, the disposal tape 10 having a laminated structure is spread into a long shape. Thereafter, the extension 12 starts to extend under a predetermined stress (as a first stress). When a load in the longitudinal direction X1 is continuously applied to the disposal tape 10, the extension 12 starts to plastically deform under a predetermined stress (second stress) greater than the first stress. Further, when a load is continuously applied to the disposal tape 10 in the longitudinal direction X1, the disposal tape 10 breaks at the end thereof under a predetermined stress greater than the second stress. Alternatively, the fastening portion 13 may be plastically deformed by a predetermined stress greater than the second stress, and then the disposal tape 10 may be broken. Since the strength of the disposal tape 10 decreases when plastic deformation occurs, it is preferable that the disposable tape is wound around the diaper 1 in a rolled shape from the start of elongation to the start of plastic deformation.

In the present specification, "stress at the start of elongation (first stress)" of the waste tape 10 means stress at the start of elongation of the elongated portion 12, and "stress at the start of plastic deformation (second stress)" of the waste tape 10 means stress at the start of plastic deformation of the elongated portion 12.

Therefore, the stress at the start of extension of the flange expansion and contraction portion 62 of the leakage preventing flange 6 is preferably smaller than the stress (second stress) at the start of plastic deformation of the disposal tape 10. In this way, the burring stretch units 62 can start to stretch at the stage when the disposal tape 10 reaches elastic deformation before plastic deformation. Therefore, before plastic deformation of the disposal tape 10, the energy of the tensile force from the disposal person is consumed by the expansion of the burring expansion and contraction portion 62, and the disposal person easily obtains a feeling of smoothly expanding, so that plastic deformation of the disposal tape 10 can be more effectively suppressed.

Further, it is preferable that the stress at the start of extension of the cuff expansion and contraction portion 62 of the leakage preventing cuff 6 is smaller than the stress (first stress) at the start of extension of the disposal tape 10. Before the waste tape 10 starts to stretch, the burring stretch unit 62 starts to stretch, and thus the load at the initial stage of the stretching operation of the waste tape 10 is perceived to be light. Thus, the waste of the diaper 1 can more reliably obtain the feeling of smoothly elongating the disposal tape 10 with a smaller load at the initial stage of elongation.

[ more detailed arrangement of fixing portion ]

As shown in fig. 3, at least a part of the fixing portion 11 is preferably disposed in a joining region S where the outer body 5 and the absorbent main body 4 are joined. The "at least a portion of the fixing portion 11 is disposed on the joining region S" includes that at least a portion of the fixing portion 11 is disposed on at least a portion of the joining region S.

The joining region S is a region where the outer body 5 and the constituent members (for example, the back sheet) on the non-skin-facing side of the absorbent main body 4 are joined by a known joining method such as an adhesive or welding. In the example shown in fig. 3, in the joining region S, the outer body 5 and the absorbent main body 4 are joined via an adhesive S1 such as a hot melt adhesive.

The bonding region S may include a plurality of small regions having a planar shape such as a band shape, a line shape, or a dot shape. These small regions can be arranged at intervals in a plane direction orthogonal to the thickness direction Z. In this case, at least a part of the fixing portion 11 is preferably disposed over 1 or more of the small areas.

At least a part of the fixing portion 11 is disposed on the joining region S, whereby the tensile force of stretching the disposal tape 10 is easily transmitted to the absorbent main body 4 via the joining region S. As a result, the leakage preventing cuff 6 of the absorbent main body 4 is more easily stretched by the tensile force. Therefore, the effect of assisting the extension of the disposal tape 10 can be obtained more easily by the extension of the leakage preventing cuff 6.

As shown in fig. 7, the distance D3 along the longitudinal direction X between the lower end 11b of the fixing portion 11 and the end 62a of the burring and telescoping portion 62 is preferably 50% or less of the dimension L of the fixing portion 11 in the longitudinal direction X. The distance D3 can be calculated as a difference between the distance D1 along the longitudinal direction X between the lower end 11b of the fixed portion 11 and the open end 50 and the distance D2 between the end 62a of the burring-telescoping portion 62 and the open end 50.

The end 62a used for calculating the distance D3 is the smaller distance D2 of the end 62a located on the abdominal region a side or the end 62a located on the back region B side.

Thus, the region on the upper end 11a side of the fixing portion 11 is located above the burring and telescoping portion 62 in the longitudinal direction X. Therefore, the region on the upper end 11a side of the fixing portion 11 is less susceptible to the expansion and contraction of the burring expansion and contraction portion 62, and the fixing portion 11 and the outer body 5 are joined more stably.

As shown in fig. 2, 7, and the like, the leg elastic members 21 are disposed along the pair of leg openings 1L in the outer case 5. The leg elastic member 21 includes 1 or more elastic members in the form of a wire or a belt (for example, rubber strings or the like). The leg elastic member 21 extends in the longitudinal direction X in the developed and extended state as shown in fig. 2 and 7. The "leg elastic member 21 extends in the longitudinal direction X" means that the leg elastic member 21 extends from the middle portion of the crotch region C in the longitudinal direction X to above the longitudinal direction X.

The upper end portion 21a of the leg elastic member 21 above the longitudinal direction X is the uppermost portion of the leg elastic member 21 in the extended and extended state shown in fig. 2 and 7. In the example shown in fig. 2 and 7, the upper end portion 21a is located at the side edge portions A1, B1 of the ventral region a and the dorsal region B.

From the viewpoint of suppressing the influence of the elongation of the leg elastic member 21 at the time of elongation of the disposal tape 10, it is preferable that the distance D1 along the longitudinal direction X between the lower end portion 11b of the fixing portion 11 and the open end 50 is smaller than the distance D4 along the longitudinal direction X between the upper end portion 21a of the leg elastic member 21 and the open end 50. That is, the lower end 11b of the fixing portion 11 is preferably located above the upper end 21a in the longitudinal direction X.

This can suppress the tensile force from acting on the leg elastic members 21 when the disposal tape 10 is stretched, and can suppress the leg elastic members 21 from being stretched by the tensile force. Therefore, by adopting this structure, the diaper 1 can be prevented from being excessively elongated in the longitudinal direction X in response to the elongation of the disposal tape 10, and from being excessively contracted when the tensile force is weakened.

Supplementary explanation of the present embodiment

The following is a supplementary explanation of the present embodiment.

(specific examples of stresses and the like at the beginning of extension of the burring expansion and contraction portion)

The stress at the beginning of extension of the cuff expansion portion 62 of the leakage preventing cuff 6 is preferably 0.5N or less, more preferably 0.2N or less.

The stress (first stress) at the start of extension of the disposal tape 10 (extension 12) is preferably 5.0N or less, more preferably 3.0N or less.

The stress (second stress) at the start of plastic deformation of the disposal tape 10 (extension 12) is preferably 6.0N or more, more preferably 8.0N or more.

(method for measuring stress at the beginning of expansion and contraction of leakage-proof turned-over edge)

The edge-turning forming sheet 61 of the leakage preventing edge 6 is peeled off from the front sheet 2 of the absorbent main body 4 or the like. Next, the longitudinal direction of the leakage preventing flanges 6 was aligned with the tensile direction so that the distance between chucks was set to 100mm, and the leakage preventing flanges 6 were mounted on chucks of a tensile testing machine (for example, orintec co., ltd., model "RTA-100"). When the leak-proof flange 6 is attached to the chuck, both end portions of the flange expansion and contraction portion 62 are attached to the chuck. Next, stretching was performed at a speed of 300mm/min, and the tensile load stress varying with the stretching distance was measured.

Immediately after the measurement, the leakage preventing cuff 6 is stretched in the longitudinal direction until the leakage preventing cuff 6 is stretched over a large distance without being stretched. Then, at a certain point, the slope of the stress (N) -elongation curve changes, and the stress increases approximately in proportion to the stretch distance. The stress at the point where the slope initially changes is referred to as the stress (N) at the beginning of extension of the cuff extension portion 62 of the leakage preventing cuff 6.

(method for measuring stress of waste tape)

The extension 12 of the disposal tape 10 is peeled off from the fixing portion 11 to be in an expanded state extending in the longitudinal direction X1. Next, the longitudinal direction X1 of the extension 12 was aligned with the stretching direction so that the distance between chucks was 30mm, and the extension 12 was mounted on a chuck of a tensile testing machine (for example, model "RTA-100" manufactured by orintec co., ltd.). When the extension 12 is attached to the chuck, a portion between the two joint portions is attached to the chuck while avoiding the joint portion with the fixing portion 13 and the joint portion with the fixing portion 11. Then, the steel sheet was stretched at a speed of 300mm/min, and the stress (tensile load) varying with the stretching distance was measured.

Immediately after the measurement, the extension 12 is stretched in the longitudinal direction X1, and the stretching distance of the extension 12 increases without stretching. After that, at a certain point, the slope of the stress (N) -elongation curve changes greatly, and the stress starts to increase approximately in proportion to the elongation. The stress at the point at which the slope initially starts to change is referred to as the first stress (N) which is the stress at the start of the extension of the disposal tape 10 (extension 12).

When the stretching distance is further increased from the start of stretching of the stretched portion 12, the slope of the stress (N) -elongation curve at a certain point becomes smaller, and the stress is hardly changed with respect to the stretching distance. The stress at the point where the slope greatly changes after the start of elongation is regarded as the second stress (N) which is the stress at the start of plastic deformation of the disposal tape 10 (the elongated portion 12). The second stress (N) becomes the inflection point of the stress (N) -elongation curve.

When the stretching distance is further increased from the start of plastic deformation of the extension portion 12, the stress becomes maximum at a certain point, and thereafter the extension portion 12 breaks.

(method for measuring stress at the beginning of Plastic deformation of fastening portion)

The fastening portion 13 of the disposal tape 10 is peeled off from the extension portion 12, and is formed in an expanded state extending in the longitudinal direction X1. Next, the longitudinal direction X1 of the disposal tape 10 was aligned with the stretching direction so that the distance between chucks was 30mm, and the fastening portion 13 was mounted on a chuck of a tensile testing machine (for example, orintec co., ltd., model "RTA-100"). When the fixing portion 13 is attached to the chuck, a portion between the two joint portions is attached to the chuck while avoiding the joint portion with the extension portion 12 and the joint portion with a grip portion described later. Then, the sheet was stretched at a speed of 300mm/min, and the stress (tensile load) varying with the stretching distance was measured.

Immediately after the measurement, the fixing portion 13 is stretched in the longitudinal direction until the fixing portion 13 is stretched, and the stretching distance is increased without stretching. After that, at a certain point, the slope of the stress (N) -elongation curve changes greatly, and the stress starts to increase approximately in proportion to the elongation. The stress at the point where the slope initially changes is defined as the stress (N) at the beginning of elongation at which the fastening portion 13 begins to elongate.

When the stretching distance is further increased from the start of stretching of the fastening portion 13, the slope of the stress (N) -elongation curve at a certain point becomes smaller, and the stress is hardly changed with respect to the stretching distance. The stress at the point where the slope greatly changes after the start of elongation is taken as the stress (N) at the start of plastic deformation of the fastening portion 13. The stress (N) at the start of plastic deformation of the fastening portion 13 becomes an inflection point of a stress (N) -elongation curve.

(Material of the adhesive portion for extension portion and the adhesive portion for fastening portion)

As the adhesive 17 for an extension portion that releasably joins the extension portion 12 and the fixing portion 11, and the adhesive 19 for a fixing portion that releasably joins the fixing portion 13 and the extension portion 12, for example, a rubber-based adhesive and an acrylic-based adhesive are generally used, and a rubber-based adhesive is preferably used. Examples of the rubber-based adhesive include synthetic rubbers such as styrene-butadiene block copolymers and hydrogenated styrene-butadiene block copolymers, and mixtures of these synthetic rubbers and resins. In addition, heat sealing, hot melt adhesives, melt blown adhesives, fibrous adhesives, and the like may be used for the

adhesive parts

17, 19.

The extension portion adhesive portion 17 and the fixing portion adhesive portion 19 may be formed on the entire surfaces of the second surface 16b of the extension portion sheet 16 and the second surface 18b of the fixing portion sheet 18, respectively. The

adhesive portions

17 and 19 may be formed at intervals. In this case, the adhesive agent is intermittently applied, whereby the

adhesive portions

17 and 19 can be formed at intervals.

(specific examples of distances D1, D2, D3 and dimension L)

The distance D1 along the longitudinal direction X between the lower end portion 11b of the fixing portion 11 and the opening end 50 is preferably 65mm or more, more preferably 70mm or more, still more preferably 115mm or less, and still more preferably 110mm or less, from the viewpoint of avoiding the waist wrinkles or the like at the joint position of the fixing portion 11 and suppressing the deterioration of the wearing feeling due to the disposal tape 10.

The distance D2 along the longitudinal direction X between the end 62a of the burring-extending/contracting portion 62 and the open end 50 is preferably 63mm or more, more preferably 65mm or more, even more preferably 113mm or less, and even more preferably 105mm or less, from the viewpoint of obtaining a good fit of the leakage-preventing burring 6 and effectively applying the tensile force of the disposal tape 10 to the burring-extending/contracting portion 62.

The dimension L of the fixing portion 11 in the longitudinal direction X is preferably 40mm or more, more preferably 45mm or more, preferably 60mm or less, more preferably 55mm or less, from the viewpoint that a sufficient length can be obtained when the disposal tape 10 is stretched and extended, and the disposal tape 10 is compactly configured.

The distance D3 along the longitudinal direction X between the lower end 11b of the fixing portion 11 and the end 62a of the burring and telescoping portion 62 is preferably 2mm or more, more preferably 5mm or more, still more preferably 60mm or less, and even more preferably 55mm or less, from the viewpoint of ensuring the joint strength between the fixing portion 11 and the outer surface 5a and enabling the stretching force of the disposal tape 10 to function more reliably by the burring and telescoping portion 62.

While the embodiments of the present invention have been described above, the present invention is not limited to the above embodiments, and various modifications can be made without departing from the spirit of the present invention.

For example, the disposal tape 10 may be configured so as not to have the fastening portion 13, but to be fastened to the outer surface 5a by the extension adhesive portion 17 of the extension portion 12. In this case, the grip portion may be joined to the second end portion (end portion not connected to the fixing portion 11) of the extension portion 12.

The disposal tape 10 may not have the grip portion 20. In this case, for example, by providing a non-adhesive portion on one end side of the fixing portion 13, a disposal person can grasp the portion.

The lower end 12b of the extension 12 may be connected to the fixed portion 11, the upper end 12a may constitute a second end of the extension 12, and the lower end 12b may constitute a first end of the extension 12. In this case, the upper end portion 12a may be connected to the fastening portion 13, and the grip portion 20 may be disposed on the crotch region C side.

The fixing portion 11 may not have the fixing portion adhesive portion 15, and the fixing portion sheet 14 may be fixed to the outer surface 5a by a known bonding method other than an adhesive (for example, welding).

The disposal tape 10 is not limited to the example of being disposed on the center line CL along the longitudinal direction X, and may be disposed on the lateral direction Y side of the center line CL.

For example, in the embodiment shown in fig. 1, 2, and the like, the diaper 1 having the outer case 5 having the crotch region C, the abdomen-side region a, and the back-side region B has been described, but the present invention is not limited thereto. For example, the pants-type absorbent article of the present invention may be an outer cover-divided pants-type absorbent article. In such a pants-type absorbent article, the outer body is divided into a back side sheet member disposed on the back side of the wearer and a stomach side sheet member disposed on the stomach side, and the back side sheet member and the stomach side sheet member are joined at side edge portions. The absorbent body is fixed between the back side sheet member and the abdomen side sheet member.

In the above embodiments, the pants-type disposable diaper is exemplified as the pants-type absorbent article, but the present invention is not limited thereto. The pants-type absorbent article of the present invention may be, for example, pants-type disposable physiological pants or the like.

The invention further discloses the following.

<1>

A pants-type absorbent article having a waist opening and a pair of leg openings, and having a longitudinal direction extending from the abdomen side to the back side of a wearer through a crotch, and a transverse direction orthogonal to the longitudinal direction, and being divided into an abdomen side region, a crotch region, and a back side region along the longitudinal direction,

The pants-type absorbent article further comprises:

an absorbent body comprising an absorbent body;

a disposal tape disposed in the abdomen-side region or the back-side region so as to overlap the absorbent body in a plan view,

the disposal tape includes:

an extensible extension portion including a first end portion connected to the fixing portion, extending in the longitudinal direction, and being arranged in a peelable manner on the fixing portion,

the absorbent main body has a pair of leakage preventing cuffs disposed on both lateral sides, the pair of leakage preventing cuffs each including a stretchable cuff expansion portion extending in the longitudinal direction,

<2>

The pants-type absorbent article according to item <1>, wherein,

the stress at the beginning of the elongation of the burring expansion part is smaller than the stress at the beginning of the plastic deformation of the disposal tape.

<3>

The pants-type absorbent article according to item <2>, wherein,

the stress at the start of plastic deformation of the disposal tape is 6.0N or more, preferably 8.0N or more.

<4>

The pants-type absorbent article according to <2> or <3>, wherein,

the stress at the beginning of plastic deformation of the fastening portion is 30N or less, preferably 25N or less.

<5>

The pant-type absorbent article according to any of the above <2> to <4>, wherein,

the stress at the beginning of the extension of the flange expansion and contraction part is smaller than the stress at the beginning of the extension of the disposal tape.

<6>

The pants-type absorbent article according to item <5>, wherein,

the stress at the beginning of the extension of the disposal tape is 5.0N or less, preferably 3.0N or less.

<7>

The pant-type absorbent article according to any of the above <1> to <6>, wherein,

at least a part of the fixing portion is disposed on a joining region where the outer body and the absorbent body are joined.

<8>

The pant-type absorbent article according to any of the above <1> to <7>, wherein,

the distance in the longitudinal direction between the lower end portion of the fixing portion and the end portion of the burring and telescoping portion is 50% or less of the dimension of the fixing portion in the longitudinal direction.

<9>

The pant-type absorbent article according to any of the above <1> to <8>, wherein,

the leg elastic members are disposed along the pair of leg opening portions in the outer case,

the distance in the longitudinal direction between the lower end portion and the open end of the fixing portion is smaller than the distance in the longitudinal direction between the upper end portion of the leg elastic member above the longitudinal direction and the open end.

<10>

The pant-type absorbent article according to any of the above <1> to <9>, wherein,

the extension also includes a second end opposite the first end,

the disposal tape has a non-stretchable fastening portion connected to the second end portion of the extension portion,

the fastening portion is releasably disposed on the extension portion.

Examples

Example 1

A pants-type disposable diaper of example 1 of this embodiment was manufactured. First, as a pants-type disposable diaper, a disposable diaper of a size of Shu Duanku L (manufactured by Kagaku corporation) was prepared, and the position of the disposal tape was adjusted so that the lower end portion of the fixing portion was located longitudinally below the end portion of the cuff stretch portion.

The disposal tape is disposed on the outer surface of the back side region via the fixing portion. The fixing portion and the fixing portion of the disposal tape are formed of a film using a polypropylene/polyethylene mixture, and the extension portion is formed of a film using a low-density polyethylene.

In the diaper of example 1, the dimension L in the longitudinal direction of the fixing portion of the disposal tape was formed to be 55mm as shown in table 1. The distance D1 in the longitudinal direction between the lower end portion of the fixing portion of the disposal tape and the opening end of the waist opening was 97mm as shown in table 1. The distance D2 in the longitudinal direction between the end of the burring expansion and contraction portion and the open end was formed to be 95mm. The distance D3 in the longitudinal direction between the lower end portion of the fixing portion and the end portion of the burring and telescoping portion was 2mm.

Examples 2 and 3

As examples 2 and 3, pants-type disposable diapers having the same configuration as example 1 except for the distance D1 were produced. These diapers were manufactured in such a manner that the lower end portion of the fixing portion was disposed longitudinally below the end portion of the cuff stretch portion, as in example 1. The distance D1, the distance D2, the distance D3, and the dimension L are formed to the values shown in table 1.

Example 4

As example 4, a pants-type disposable diaper having the same configuration as example 1 except for the distance D1 and the dimension L was manufactured. The diaper was manufactured in such a manner that the lower end portion of the fixing portion was disposed longitudinally below the end portion of the cuff stretch portion, as in examples 1 to 3. The distance D1, the distance D2, the distance D3, and the dimension L take the values shown in table 1.

Comparative example 1

As comparative example 1, a pants-type disposable diaper having the same configuration as that of example 1 except for the distance D1 was produced, and the lower end portion of the fastening portion and the end portion of the cuff stretch portion were arranged side by side in the lateral direction. That is, the distance D3 is 0mm as shown in Table 1. The distance D1, the distance D2, and the dimension L take the values shown in table 1.

Comparative example 2

As comparative example 2, a pants-type disposable diaper having the same configuration as that of example 1 except for the distance D1 was produced, and the lower end portion of the fixing portion was disposed at a position longitudinally above the end portion of the cuff stretch portion. The distance D1, the distance D2, and the dimension L take the values shown in table 1. In table 1, the distance D3 is represented as-10 mm in view of the negative value of the difference obtained by subtracting the distance D2 from the distance D1.

TABLE 1

[ measurement of stress at the beginning of extension of the Flanging Telescopic portion ]

The stress (N) at the beginning of the extension of the cuff expansion and contraction portion was measured using the leak-proof cuffs of examples 1 to 4 and comparative examples 1 and 2. First, the edge-forming sheet of the leakage-proof edge is peeled from the front sheet of the absorbent main body. Next, the longitudinal direction of the leakage preventing flanges was aligned with the stretching direction so that the distance between chucks was 100mm, and both ends of the leakage preventing flanges were mounted on chucks of a tensile testing machine (orintec co., ltd., model "RTA-100"). Next, the leakage-proof cuff was stretched at a speed of 300mm/min, and the tensile load (stress) varying with the stretching distance was measured.

As described above, the point at which the slope of the stress (N) -elongation curve is greatly changed at first and the stress starts to increase in proportion to the elongation is set as the stress (N) at the start of the elongation of the cuff expansion and contraction portion. As a result, as shown in table 1, the stress (N) at the start of extension of the burring and telescoping portion was 0.02N in each of examples 1 to 4 and comparative examples 1 and 2.

[ measurement of stress at the beginning of elongation and at the beginning of Plastic deformation of waste tape ]

The elongated portions of the waste tapes of examples 1 to 4 and comparative examples 1 and 2 were peeled from the fixed portion, and were formed in an expanded state extending in the longitudinal direction. Next, the length direction of the extension portion was aligned with the stretching direction so that the distance between chucks was 30mm, and the extension portion was mounted on a chuck of a tensile testing machine (orintec co., ltd., model "RTA-100"). When the extension portion is attached to the chuck, a portion between the two joint portions is attached to the chuck while avoiding the joint portion with the fixed portion and the joint portion with the fixed portion. The tensile tester was used to stretch the extension at a speed of 300mm/min, and the stress (load) varying with the stretching distance was measured.

As described above, the point at which the slope of the stress (N) -elongation curve is greatly changed at first and the stress starts to increase in proportion to the elongation is regarded as the stress at the start of the elongation of the disposal tape. The stress at the point where the slope greatly changes from the time of elongation and the stress starts to change not in proportion to the elongation is regarded as the stress at the time of plastic deformation of the disposal tape.

As shown in table 1, the stress at the start of elongation of the waste tape was 2N in each of examples 1 to 4 and comparative examples 1 and 2, and the stress at the start of plastic deformation was 8N.

That is, in the diapers of the examples and the comparative examples, the stress at the start of extension of the cuff stretch portion is smaller than the stress at the start of plastic deformation of the disposal tape and the stress at the start of extension.

[ evaluation of the easily-extensible property of waste adhesive tape ]

With the diapers obtained in examples 1 to 4 and comparative examples 1 and 2 as targets, 160g of ion-exchanged water was injected. Next, 30 monitors were allowed to perform an operation of rolling up diapers into clusters and fixing the diapers with waste tapes. The waste tape was evaluated for stretchability, and classified according to the following criteria.

< criterion >

A: the monitor answers above 8 are easily elongated.

B: monitor answers of 5 or more and less than 8 are prone to elongation.

C: monitor answers less than 5 tend to stretch.

As shown in table 1, the waste tapes were evaluated for stretchability, a, B, and C in comparative example 1 and comparative example 2, respectively. From the results, it is understood that the waste tapes of examples 1 to 4 are perceived to be more easily elongated than those of comparative examples 1 and 2.

[ evaluation about breakage of waste adhesive tape ]

With the diapers obtained in examples 1 to 4 and comparative examples 1 and 2 as targets, 160g of ion-exchanged water was injected. Next, 30 monitors were allowed to perform an operation of rolling up diapers into clusters and fixing the diapers with disposal tapes. The ratio of the broken waste tape due to this discarding operation was calculated as the broken ratio (%) of the waste tape.

As shown in table 1, the breaking ratio of the waste tapes in the diapers of examples 1 to 4 was 7% or less, and the breaking ratios of the waste tapes in the diapers of comparative examples 1 and 2 were 13% and 20%. From the results, it is understood that the waste tapes of examples 1 to 4 are less broken in the waste operation than those of comparative examples 1 and 2.

[ summary ]

As described above, the diapers of examples 1 to 4 in which the lower end portion of the fixing portion is disposed longitudinally below the end portion of the cuff stretch unit are more likely to be stretched and less likely to break than the diapers of comparative examples 1 and 2, and therefore, the disposal of the disposal tape can be smoothly and reliably performed.

Description of the reference numerals

1 … … diaper (Disposable pants-type diaper, pants-type absorbent article)

4 … … absorbent body

40 … … absorber

5 … … outer package

5a … … outer surface

10 … … waste tape

11 and … … fixing part

Lower end of 11b … … fixing part

12 … … extension

6 … … leak-proof flange

62 … … flanging telescopic part

62a … … end of the turn-up telescoping portion

A … … ventral region

B … … backside region

C … … crotch region

Industrial applicability

The pants-type absorbent article according to the present invention can smoothly and reliably discard the disposal tape.

Claims

1. A pants-type absorbent article having a waist opening and a pair of leg openings, and having a longitudinal direction extending from the abdomen side to the back side of a wearer through a crotch, and a transverse direction orthogonal to the longitudinal direction, and being divided into an abdomen side region, a crotch region, and a back side region along the longitudinal direction, characterized in that:

the pants-type absorbent article further comprises:

an absorbent body comprising an absorbent body;

The disposal tape includes:

2. The pant-type absorbent article of claim 1, wherein:

3. The pant-type absorbent article of claim 2, wherein:

the stress at the beginning of plastic deformation of the waste tape is 6.0N or more.

4. A pant-type absorbent article according to claim 2 or 3, wherein:

The stress at the beginning of plastic deformation of the fastening part is below 30N.

5. The pant-type absorbent article according to any of claims 2 to 4, wherein:

6. The pant-type absorbent article of claim 5, wherein:

the stress at the beginning of the extension of the waste tape is 5.0N or less.

7. The pant-type absorbent article according to any of claims 1 to 6, wherein:

8. The pant-type absorbent article according to any of claims 1 to 7, wherein:

9. The pant-type absorbent article according to any of claims 1 to 8, wherein:

10. The pant-type absorbent article according to any of claims 1 to 9, wherein:

the extension also includes a second end opposite the first end,

the fastening portion is releasably disposed on the extension portion.