Absorbent articles
The absorbent article's tape design with folded and auxiliary connection parts addresses adhesive failure by providing increased margin and flexibility, maintaining secure attachment during wearer movement.
Patent Information
- Application Number
- JP2021010394
- Authority / Receiving Office
- JP · JP
- Patent Type
- Patents
- Current Assignee / Owner
- Filing Date
- 2021-01-26
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2041-01-26
AI Technical Summary
Existing absorbent articles, such as diapers, experience adhesive failure at the connection point between the front and back body regions due to insufficient margin, leading to load transfer and potential detachment when the wearer's abdomen expands.
The absorbent article incorporates a tape design with folded and auxiliary connection parts that provide additional length and flexibility, allowing for increased margin and reduced load on the adhesive connection points, preventing detachment.
The design effectively reduces the load on adhesive connections, preventing detachment and enhancing the stability of the absorbent article during wearer movement, ensuring secure attachment.
Smart Images
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Abstract
Description
[Technical field]
[0001] The present disclosure relates to absorbent articles. [Background technology]
[0002] 2. Description of the Related Art Among absorbent articles such as disposable diapers, incontinence pads, and sanitary products, there are so-called tape-type articles that are equipped with hook-and-loop fasteners or the like for fastening around the waist of a wearer (see, for example, Patent Document 1).
[0003] In this type of absorbent article, for example, a tape is provided on both the left and right edges of a portion of the absorbent article that corresponds to the back body of the wearer, and an attachment portion such as a front patch is provided on a portion that corresponds to the front body of the wearer. Then, by attaching the tape to the attachment portion, the absorbent article is put on the wearer. [Prior art documents] [Patent documents]
[0004] [Patent Document 1] JP 2001-245923 A Summary of the Invention [Problem to be solved by the invention]
[0005] However, if the area corresponding to the front body and the area corresponding to the back body of the absorbent article are tightly connected by the tape attached to the attachment part, when the wearer's abdomen expands due to the wearer's movement, the load caused by the expansion is directly applied to the connection part, which may cause the attachment part between the tape and the attachment part to come off.
[0006] One aspect of the present disclosure has been made in view of the above circumstances, and an object of the present disclosure is to provide an absorbent article that reduces the load on an attachment portion. [Means for solving the problem]
[0007] In order to solve the above problems, in the present invention, the tape has a folding portion interposed between the base end and the protruding portion, and the folding portion has a first folding portion that is folded back at the edges of the left and right ends in a direction opposite to the protruding direction of the protruding portion and extends from the edges of the left and right ends to a position of a predetermined length and is adhered to the other surface of the left and right ends, and a second folding portion that is folded back at the predetermined length position in the protruding direction and extends to the edges of the left and right ends and overlaps the first folding portion.
[0008] In detail, the present invention relates to an absorbent article to be worn under the crotch of a wearer, the absorbent article comprising: an absorbent body arranged in a region of the absorbent article corresponding to the crotch of the wearer; a first sheet arranged on the wearer's side of the absorbent body and in contact with the wearer's skin; a second sheet arranged on the opposite side of the absorbent body to the wearer and forming an exterior surface of the absorbent article; tapes protruding from the left and right ends of one of the regions of the absorbent article corresponding to the abdomen and back of the wearer and having an adhesive portion formed on the surface facing the wearer; and a tape provided on the exterior surface of the other region of the absorbent article and having an adhesive portion formed on the surface facing the wearer. and an adherend portion to which the tape is attached, the tape having a base end adhered to either the wearer-facing surface or the surface opposite the wearer of the left or right end, protruding portions protruding from the edges of the left or right end, and a folded portion interposed between the base end and the protruding portions, the folded portion having a first folded portion that is folded back at the edges of the left or right end in a direction opposite to the protruding direction of the protruding portions and extends from the edges of the left or right end to a position of a predetermined length and is adhered to the other surface of the left or right end, and a second folded portion that is folded back at the predetermined length in the protruding direction and extends to the edges of the left or right end and overlaps the first folded portion.
[0009] In the absorbent article, the base end may be longer than the first folded-back portion.
[0010] In addition, in the above-mentioned absorbent article, the tape extends in the protruding direction from the left and right ends, beyond the second fold portion, to a part of the protruding portion, and is adhered to the other surface of the left and right ends, the surface of the second fold portion opposite the first fold portion, and the wearer-facing surface of the part of the protruding portion, and has an auxiliary connecting portion connecting the left and right ends and the protruding portion, and the adhesive portion may be formed on the wearer-facing surface of the protruding portion.
[0011] In the absorbent article, the portions of the auxiliary connecting portion that are bonded to the left and right ends and the second folded-back portion may be longer than the base end portion.
[0012] Furthermore, in the above-mentioned absorbent article, the tape may extend from the left and right ends in the protruding direction beyond the second folded portion and the protruding portion, and be adhered to the other surface of the left and right ends, the surface of the second folded portion opposite the first folded portion, and the surface of the protruding portion opposite the wearer, and have auxiliary connecting portions connecting the left and right ends and the protruding portion, the auxiliary connecting portions extending in the protruding direction beyond the protruding portion, and the adhesive portion being formed on the wearer-facing surface of the auxiliary connecting portion beyond the protruding portion.
[0013] In the absorbent article, the base end may be longer than the left and right ends of the auxiliary connecting part and the portion bonded to the second folded-back part. Effect of the Invention
[0014] According to the present invention, the load on the adhesion portion can be reduced. [Brief description of the drawings]
[0015] [Figure 1] FIG. 1 is a perspective view of a diaper according to the present embodiment. [Diagram 2] FIG. 2 is an exploded perspective view of the diaper. [Diagram 3] FIG. 3 is a cross-sectional view of the diaper when not being worn, taken along the width direction at the center in the longitudinal direction. [Figure 4] FIG. 4 is a plan view of the diaper in a stretched state, as viewed from the skin-facing side. [Diagram 5] FIG. 5 is a plan view of the diaper in a stretched state, as viewed from the non-skin facing side. [Figure 6] FIG. 6 is a cross-sectional view of the tape of the embodiment cut in the width direction of the diaper. [Figure 7]Figure 7(A) is a diagram showing an example of the state in which a tape of an embodiment is attached to a front patch when a normal load is applied to the connection portion between the front body region and the back body region, and Figure 7(B) is a diagram showing an example of the state in which a tape of an embodiment is attached to a front patch when a relatively strong load is applied to the connection portion between the front body region and the back body region. [Figure 8] FIG. 8 is a cross-sectional view of another example of the tape cut in the width direction of the diaper. [Figure 9] Figure 9(A) is a diagram showing an example of a different example of tape attached to a front patch when a normal load is applied to the connecting portion between the front body region and the back body region, and Figure 9(B) is a diagram showing an example of a different example of tape attached to a front patch when a relatively strong load is applied to the connecting portion between the front body region and the back body region. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
[0016] Hereinafter, absorbent articles according to embodiments of the present invention will be described with reference to the drawings. Note that the configurations of the following embodiments are merely examples, and the present invention is not limited to the configurations of these embodiments.
[0017] <Embodiment> In this embodiment, a tape-type disposable diaper (an example of the “absorbent article” referred to in the present application, In the diaper (hereinafter simply referred to as "diaper"), the direction connecting the front body arranged opposite the wearer's abdomen and the rear body arranged opposite the wearer's back is defined as the longitudinal direction. Between the front body (one side in the longitudinal direction) and the rear body (the other side in the longitudinal direction) (the center in the longitudinal direction), the crotch part arranged under the wearer's crotch (opposed to the crotch). Furthermore, when the diaper is worn by a wearer (hereinafter abbreviated as "worn state"), the side facing the wearer's skin (the inner side when worn) is defined as the skin-facing side, and the opposite side to the skin-facing side (the outer side when worn) is defined as the non-skin-facing side. Furthermore, the direction connecting the skin-facing side and the non-skin-facing side is defined as the thickness direction, and the direction perpendicular to both the longitudinal direction and the thickness direction is defined as the width direction. In addition, the view from the thickness direction is defined as a planar view.
[0018] FIG. 1 is a perspective view of a diaper according to the present embodiment. The diaper 1 has a crotch region 1B, which is a region corresponding to the crotch of the wearer covering the pubic area when worn, a front body region 1F, which is located in front of the crotch region 1B and corresponds to the front body of the wearer, and a back body region 1R, which is located behind the crotch region 1B and corresponds to the back body of the wearer. Tapes 2L and 2R that can be attached to a front patch 2F provided on the non-wearer side surface of the front body region 1F are provided on both left and right edges of the back body region 1R. When the tapes 2L and 2R are attached to the front patch 2F with the front body region 1F positioned on the wearer's abdomen and the back body region 1R positioned on the wearer's back, the diaper 1 is fixed to the wearer's body in a state surrounding the wearer's waist circumference and thighs. Since the diaper 1 is fixed to the wearer's body in this manner, the wearer can stand and walk while wearing the diaper 1.
[0019] In the diaper 1, an absorbent capable of absorbing and retaining liquid is mainly disposed near the crotch region 1B. In addition, in order to prevent the formation of a gap between the diaper 1 and the wearer's skin that can be a liquid outflow path, the diaper 1 is provided with leg gathers 3AL, 3AR at a portion surrounding the wearer's legs (thighs), and three-dimensional gathers 3BL, 3BR are provided on the inner side of the leg gathers 3AL, 3AR in the width direction of the diaper 1, and a waist gather 3R is provided at a portion surrounding the wearer's abdominal circumference. The leg gathers 3AL, 3AR, the three-dimensional gathers 3BL, 3BR, and the waist gathers 3R are in close contact with the wearer's skin by the elastic force of the elastic members. Therefore, liquid discharged from the wearer's private parts is absorbed by the absorbent of the diaper 1 without leaking out of the diaper 1. As the elastic member, a thread-like or strip-like rubber or the like can be appropriately selected.
[0020] FIG. 2 is an exploded perspective view of the diaper 1. FIG. 3 is a cross-sectional view of the diaper 1 when not worn, cut in the width direction at the center in the longitudinal direction. FIG. 4 is a plan view of the diaper 1 when stretched, as viewed from the skin-facing side. FIG. 5 is a plan view of the diaper 1 when stretched, as viewed from the non-skin-facing side. Note that FIG. 5 does not show elastic members 4C, 4SR, 4SL, 8EL, 8ER and side sheets 8L, 8R, which will be described later. The diaper 1 has a cover sheet 4 (an example of the "second sheet" in this application) that forms an outer surface when worn. The cover sheet 4 is a sheet-like member having a substantially rectangular appearance with constrictions 4KL, 4KR at the portions corresponding to the long sides, and forms the exterior surface of the diaper 1. The constrictions 4KL, 4KR are provided at the portions where the wearer's thighs are located (leg-surrounding regions 10L, 10R shown in FIGS. 4 and 5). The cover sheet 4 is provided to reinforce the back sheet 5 described later and to improve the feel, and may be made of a nonwoven fabric made of a liquid-impermeable thermoplastic resin to prevent leakage of excrement, for example. Examples of liquid-impermeable thermoplastic resins include polyethylene (PE) and polypropylene (PP). The cover sheet 4 is not limited to a single-layer structure, and may be a multi-layer structure having an inner cover sheet and an outer cover sheet.
[0021] The diaper 1 has a back sheet 5, an absorbent body 6C, and a top sheet 7, which are laminated in this order on the wearer-facing surface of the cover sheet 4. The back sheet 5, the absorbent body 6C, and the top sheet 7 are all sheet-like members having a substantially rectangular appearance, and the longitudinal direction is the same as that of the cover sheet. The top sheet 7 is laminated on the cover sheet 4 in the same order as the longitudinal direction of the diaper 1. The back sheet 5 is a sheet formed of a liquid-impermeable thermoplastic resin material to suppress leakage of excrement, similar to the cover sheet 4. The back sheet 5 is preferably made of a material that is also moisture-permeable to suppress stuffiness when worn. The absorbent body 6C is disposed in the crotch region 1B. The top sheet 7 (an example of the "first sheet" in the present application) is a sheet-like member disposed on the wearer's skin side so as to cover the water-absorbing surface of the absorbent body 6C. The top sheet 7 is liquid-permeable in part or in its entirety. Therefore, when the diaper 1 is worn, liquid excreted from the wearer passes through the top sheet 7 that may come into contact with the wearer's skin and enters the absorbent body 6C, where it is absorbed. For example, a woven fabric, a nonwoven fabric, or a porous film can be used as the material for the top sheet 7. The top sheet 7 may be hydrophilic.
[0022] The back sheet 5, the absorbent 6C, and the top sheet 7 all extend from the front body region 1F to the rear body region 1R. Therefore, when the wearer's private parts are covered with the cover sheet 4 in which the back sheet 5, the absorbent 6C, and the top sheet 7 are laminated, the longitudinal ends of the back sheet 5, the absorbent 6C, and the top sheet 7 are located on the wearer's ventral side and back side. In other words, the wearer's private parts are covered by the absorbent 6C from the wearer's ventral side to the back side. Therefore, whether the wearer is in a ventral or back-facing position when excreting liquid, the excreted liquid comes into contact with the absorbent 6C via the top sheet 7.
[0023] The diaper 1 has elastic members 4SL, 4SR for forming the leg gathers 3AL, 3AR between the cover sheet 4 and the back sheet 5 so as to stretch in the longitudinal direction of the diaper 1. The elastic members 4SL, 4SR are provided in an appropriate number (three in this embodiment) determined according to the elastic force (contractile force) required in the design of the diaper 1. As shown in FIG. 4, the leg gathers 3AL, 3AR are arranged at both widthwise end portions of the crotch region 1B, including the leg surrounding regions 10L, 10R, which are the regions where the wearer's thighs are located in the diaper 1. The leg surrounding regions 10L, 10R are arranged at both widthwise end portions of the crotch region 1B. The elastic members 4SL, 4SR are arranged in the leg gathers 3AL, 3AR.
[0024] The diaper 1 also has long, narrow, strip-like side sheets 8L, 8R. The side sheets 8L, 8R are liquid-impermeable sheets provided on the long sides of the top sheet 7. Like the cover sheet 4, the side sheets 8L, 8R have constrictions 8KL, 8KR at the locations where the wearer's thighs are located (leg-surrounding regions 10L, 10R shown in FIG. 4). The side sheets 8L, 8R have elastic members 8EL, 8ER arranged along the longitudinal direction to form three-dimensional gathers 3BL, 3BR. When the diaper 1 is worn, i.e., when the diaper 1 is U-shaped in side view, the side sheets 8L, 8R are pulled in the longitudinal direction by the contractile force of the elastic members 8EL, 8ER to rise from the top sheet 7 and become three-dimensional gathers 3BL, 3BR that prevent liquid from leaking out.
[0025] The cover sheet 4 is provided with elastic members 4C, which prevent a gap from being formed between the diaper 1 and the wearer's abdominal circumference, on the inner side in the width direction of the diaper 1 than the elastic members 4SL, 4SR and along the longitudinal direction of the diaper 1. The elastic members 4C are provided according to the elastic force (contractile force) required for the design of the diaper 1.
[0026] The diaper 1 also includes an elastic member 9ER for forming the above-mentioned waist gather 3R. The elastic member 9ER is provided between the back sheet 5 and the top sheet 7 at a position further toward the back side than the end of the absorbent body 6C. The elastic member 9ER extends between the back sheet 5 and the top sheet 7 so that the stretch direction of the elastic member 9ER is the width direction of the diaper 1. Thus, the tapes 2L, 2R provided on both the left and right sides of the elastic member 9ER are arranged to bend the front panel 100 on the abdominal side of the wearer. When attached to the strap 2F, the elastic members 9ER exert a contractile force to fit the diaper 1 closely to the wearer, thereby preventing a gap from being formed between the diaper 1 and the waist circumference of the wearer.
[0027] The absorbent 6C has a structure in which granular absorbent resin such as SAP (Super Absorbent Polymer), which is a hydrophilic polymer with a cross-linked structure capable of absorbing and retaining water, is held in the gaps between short fibers of cellulosic fibers such as pulp fibers, rayon fibers, or cotton fibers, or short fibers obtained by hydrophilizing synthetic fibers such as polyethylene, polypropylene, or polyethylene terephthalate. Therefore, in the absorbent 6C, the volumetric change of the absorbent resin before and after absorbing liquid basically occurs within the short fibers that hold the absorbent resin in the gaps. Therefore, when the absorbent 6C is viewed as a whole, it can be said that the expansion rate of the thickness of the absorbent 6C that has absorbed liquid is not as large as the expansion rate of the absorbent resin itself.
[0028] The SAP particles of this embodiment refer to a resin composition containing SAP in a granular form. The term "SAP-containing resin composition" as used herein includes both a composition consisting of SAP alone and a composition containing SAP as the main component and containing other substances to the extent that they do not adversely affect the water absorption. Examples of "other substances" include additives (such as surface modifiers added to make the particle surface hydrophobic) and unreacted monomers remaining during the synthesis of SAP.
[0029] 4 and 5, the diaper 1 is provided with a pair of side flap portions 11L, 11R (an example of the "left and right ends" in the present application) arranged in the rear body region 1R and extending outward in the width direction of the diaper 1 beyond the absorbent body 6C. In this embodiment, the side flap portions 11L, 11R are configured to include a cover sheet 4 forming an exterior surface of the diaper 1, and side sheets 8L, 8R joined to the skin-facing side of the cover sheet 4 for forming three-dimensional gathers 3BL, 3BR. The diaper 1 is also provided with tapes 2L, 2R connected to the pair of side flap portions 11L, 11R, respectively, and attached to a front patch 2F arranged in the front body region 1F for fixing the diaper 1 to the waist of a wearer.
[0030] The tapes 2L, 2R have base ends 20L, 20R fixed to the side flap portions 11L, 11R, and tape bases 21L, 21R (an example of a "protruding portion" in the present application) extending outward in the width direction of the diaper 1 beyond the side flap portions 11L, 11R. The base ends 20L, 20R and the tape bases 21L, 21R are formed of a single sheet member such as a nonwoven fabric. The base ends 20L, 20R are bonded with an adhesive to either the cover sheet 4 or the side sheets 8L, 8R constituting the side flap portions 11L, 11R, that is, the cover sheet 4 on the non-skin side in this embodiment. This allows the tapes 2L, 2R to be connected to the side flap portions 11L, 11R. Meanwhile, the tape bases 21L, 21R protrude from the edges of the side sheets 8L, 8R. Furthermore, hook portions 22L, 22R (an example of an "adhering portion" of the "tape" as referred to in the present application) are disposed on the skin-facing side of the tape bases 21L, 21R. The hook portions 22L, 22R are engageable with the front patch 2F (an example of an "adhered portion" as referred to in the present application). The front patch 2F has loop portions formed on its surface with which the hook portions 22L, 22R are engageable. The tapes 2L, 2R are adhered to the front body region 1F of the diaper 1 by the hook portions 22L, 22R engaging with the loop portions of the front patch 2F.
[0031] By the way, the tapes 2L, 2R are attached to the front body region 1F of the diaper 1, thereby connecting the front body region 1F and the rear body region 1R of the diaper 1 to each other. However, if the front body region 1F and the rear body region 1R are connected by the tapes 2L, 2R without any slack, when the wearer's abdomen expands as the wearer moves, the load caused by the expansion is directly applied to the connected portion. This may cause the attached portion of the tapes 2L, 2R to come off from the front body region 1F. Therefore, in this embodiment, the tapes 2L, 2R further have a folding portion and an auxiliary connecting portion. is doing.
[0032] First, the folding portion will be described with reference to Fig. 6. Fig. 6 is a cross-sectional view of the tapes 2L, 2R of the embodiment cut in the width direction of the diaper 1. Fig. 6 also shows a cross-sectional view of the side flap portions 11L, 11R cut in the width direction of the diaper 1.
[0033] 6, the folded portions 23L, 23R are portions interposed between the base ends 20L, 20R and the tape bases 21L, 21R, and have first folded portions 25L, 25R adjacent to the base ends 20L, 20R and second folded portions 26L, 26R adjacent to the tape bases 21L, 21R. The folded portions 23L, 23R, together with the base ends 20L, 20R and the tape bases 21L, 21R, are formed from the single sheet member described above.
[0034] The first folded-back portions 25L, 25R are folded back at the edges ES of the side-flap portions 11L, 11R in the direction opposite to the protruding direction of the tape base portions 21L, 21R, and extend from the base ends 20L, 20R to a position P1 of a predetermined length L1 from the edges ES of the side-flap portions 11L, 11R on the skin-facing side of the side-flap portions 11L, 11R. The first folded-back portions 25L, 25R are joined to the side sheets 8L, 8R with an adhesive.
[0035] As shown in FIG. 6, the base ends 20L, 20R extend from the edge ES of the side flap portions 11L, 11R in the cover sheet 4 to a position P2 of a predetermined length L2 (L2>L1). In this way, the base ends 20L, 20R are longer than the first folded-back portions 25L, 25R. In the structure of the tapes 2L, 2R shown in FIG. 6, the base ends 20L, 20R extend to a part of the side flap portions 11L, 11R, but are not limited to this structure. For example, the base ends 20L, 20R may extend to the entire side flap portions 11L, 11R, that is, from the edge ES on the tape 2L, 2R side to the edge on the top sheet 7 side in the side flap portions 11L, 11R.
[0036] The second folded portions 26L, 26R are folded back at position P1 in the protruding direction of the tape bases 21L, 21R, and extend from the first folded portions 25L, 25R to the edges ES of the side flap portions 11L, 11R. That is, the second folded portions 26L, 26R overlap the first folded portions 25L, 25R. The second folded portions 26L, 26R are connected to the tape bases 21L, 21R at the edges ES of the side flap portions 11L, 11R.
[0037] Next, the auxiliary connecting parts 24L, 24R will be described. The auxiliary connecting parts 24L, 24R are formed from a sheet material such as a plastic film, which is separate from the sheet material forming the base ends 20L, 20R, the folded parts 23L, 23R, and the tape base parts 21L, 21R. The sheet material forming the auxiliary connecting parts 24L, 24R has elasticity.
[0038] As shown in Fig. 6, the auxiliary connection parts 24L, 24R extend from a position P3 at a predetermined length L3 (L3>L1) from the edge ES of the side flap parts 11L, 11R of the side sheets 8L, 8R to a part of the tape bases 21L, 21R. The auxiliary connection parts 24L, 24R are bonded to the side sheets 8L, 8R, the second folded parts 26L, 26R and the tape bases 21L, 21R with an adhesive. This connects the side flap parts 11L, 11R and the tape bases 21L, 21R.
[0039] The length of the auxiliary connecting portions 24L, 24R that are joined to the side flap portions 11L, 11R and the second folded-back portions 26L, 26R is L3. The portion of 4R is longer than the base ends 20L and 20R (length L2).
[0040] The portion of the tape base 21L, 21R between the auxiliary connection 24L, 24R and the hook 22L, 22R has substantially the same length as the portion (length L3-L1) of the auxiliary connection 24L, 24R joined to the side flap 11L, 11R. An adhesive is applied to the skin-facing surface of the portion, which serves as an adhesive portion. Therefore, when the tape base 21L, 21R is folded back toward the inside in the width direction of the diaper 1 at position P1, the adhesive portion adheres the portion of the tape base 21L, 21R to the portion of the auxiliary connection 24L, 24R. This allows the tape base 21L, 21R to be temporarily fixed to the auxiliary connection 24L, 24R, and prevents the hook 22L, 22R from engaging with the side sheet 8L, 8R, the top sheet 7, or the like before the diaper 1 is used.
[0041] Further, the tip portions of the tape bases 21L, 21R that are on the outer side in the width direction of the diaper 1 than the hook portions 22L, 22R function as tabs when the tapes 2L, 2R are attached to the front patch 2F.
[0042] Next, the functions of the folded parts 23L, 23R and the auxiliary connecting parts 24L, 24R will be described with reference to Fig. 7. Fig. 7(A) is a diagram showing an example of the state in which the tapes 2L, 2R of the embodiment are attached to the front patch 2F when a normal load is applied to the connecting part between the front body region 1F and the back body region 1R, and Fig. 7(B) is a diagram showing an example of the state in which the tapes 2L, 2R of the embodiment are attached to the front patch 2F when a relatively strong load is applied to the connecting part between the front body region 1F and the back body region 1R. Note that Figs. 7(A) and (B) show the side flap parts 11L, 11R, the tapes 2L, 2R, the front patch 2F and their surroundings.
[0043] When putting the diaper 1 on a wearer, the hook portions 22L, 22R of the tapes 2L, 2R are engaged with the loop portions of the front patch 2F, thereby attaching the tapes 2L, 2R to the front patch 2F. This connects the front body region 1F and the back body region 1R of the diaper 1. When the tapes 2L, 2R are viewed from the non-skin facing side, the base ends 20L, 20R and tape bases 21L, 21R of the tapes 2L, 2R are visible, as shown in Fig. 7(A).
[0044] Here, if the front body region 1F and the back body region 1R are tightly connected by the tapes 2L, 2R, when the wearer's abdomen expands with the wearer's movement, the load due to the expansion is directly applied to the connecting portion between the front body region 1F and the back body region 1R. However, the tapes 2L, 2R of this embodiment have folded portions 23L, 23R interposed between the base ends 20L, 20R and the tape bases 21L, 21R. Therefore, when the load due to the expansion is applied to the connecting portion by a predetermined magnitude or more, the first folded portions 24L, 24R of the folded portions 23L, 23R are peeled off from the side flap portions 11L, 11R (side sheets 8L, 8R). As a result, as shown in FIG. 7(B), the folded folded portions 23L, 23R (the first folded portions 24L, 24R and the second folded portions 25L, 25R) are pulled outward in the width direction of the diaper 1. As a result, the tapes 2L, 2R have a slack corresponding to the length of the first folded portions 24L, 24R and the second folded portions 25L, 25R, and the side flap portions 11L, 11R can move outward in the width direction of the diaper 1 as shown by the arrows in FIG. 7(B). This reduces the load on the connection portion, making it difficult for the tapes 2L, 2R and the front patch 2F to come off. Furthermore, the wearer's movements are less likely to be transmitted to the rear body region 1R, so that the influence of the wearer's movements on the connection portion can be reduced. On the other hand, the front body region 1F can easily follow the wearer's movements, so that the connection can be prevented from interfering with the wearer's movements.
[0045] In addition, in the tapes 2L, 2R, the base ends 20L, 20R are longer than the first folded-back portions 25L, 25R. Since the base ends 20L, 20R are relatively long in this manner, the joining force between the base ends 20L, 20R and the side flap portions 11L, 11R (cover sheet 4) can be increased. As a result, even if the first folded-back portions 24L, 24R are peeled off from the side flap portions 11L, 11R when a load due to expansion of a predetermined magnitude or more is applied to the connecting portion, it is possible to prevent the base ends 20L, 20R from also peeling off from the side flap portions 11L, 11R, and the connection between the tapes 2L, 2R and the side flap portions 11L, 11R from being disconnected.
[0046] Furthermore, the tapes 2L, 2R have auxiliary connecting parts 24L, 24R that connect the side flap parts 11L, 11R and the tape base parts 21L, 21R. Therefore, when a load due to expansion is applied to the connecting parts by a predetermined amount or more, the auxiliary connecting parts 24L, 24R stretch and can absorb a part of the load applied to the connecting parts. As a result, the load applied to the connecting parts is further alleviated, and the attached parts of the tapes 2L, 2R and the front patch 2F can be made even more difficult to come off.
[0047] In addition, in the tapes 2L, 2R, the portions of the auxiliary connecting parts 24L, 24R that are joined to the side flap parts 11L, 11R and the second folded-back parts 26L, 26R are longer than the base ends 20L, 20R. Since the portions of the auxiliary connecting parts 24L, 24R are relatively long in this manner, the joining strength between the portions and the side flap parts 11L, 11R can be increased. This makes it difficult for the auxiliary connecting parts 24L, 24R to peel off from the side flap parts 11L, 11R, so that when a load due to expansion of a predetermined magnitude or more is applied to the connecting parts, the auxiliary connecting parts 24L, 24R can be more reliably stretched.
[0048] <Other examples of tapes and front patches> Other examples of the tape and front patch will be described below. Note that the structure of the diaper other than the tape and front patch is the same as the structure of the diaper 1 described above, so the description thereof will be omitted.
[0049] Fig. 8 is a cross-sectional view of the tape of the other example cut along the width direction of the diaper 1. Fig. 9(A) shows an example of the tape of the other example attached to the front patch when a normal load is applied to the connecting portion between the front body region 1F and the rear body region 1R, and Fig. 9(B) shows an example of the tape of the other example attached to the front patch when a relatively strong load is applied to the connecting portion between the front body region 1F and the rear body region 1R. Fig. 8 also shows a cross-sectional view of the side flap portions 11L, 11R cut along the width direction of the diaper 1. Figs. 9(A) and (B) show the side flap portions 11L, 11R, the tape, the front patch, and their surroundings.
[0050] First, the tape will be described. As shown in Fig. 8, the tape 30L, 30R of the alternative embodiment has base end portions 31L, 31R, tape base portions 32L, 32R, folded portions 33L, 33R, and auxiliary connecting portions 34L, 34R. Of the tapes 30L, 30R, the base end portions 31L, 31R, tape base portions 32L, 32R, folded portions 33L, 33R, and auxiliary connecting portions 34L, 34R are each formed of a single sheet member such as a plastic film. The sheet member forming the auxiliary connecting portions 34L, 34R has elasticity.
[0051] The base ends 31L, 31R are bonded with an adhesive to the skin-facing side sheets 8L, 8R of the cover sheet 4 and side sheets 8L, 8R constituting the side-flap portions 11L, 11R. This connects the tapes 30L, 30R to the side-flap portions 11L, 11R. The tape bases 32L, 32R (an example of a "protruding portion" in this application) protrude outward in the width direction of the diaper 1 from the edges ES of the side-flap portions 11L, 11R.
[0052] The folded portions 33L, 33R are portions interposed between the base ends 31L, 31R and the tape bases 32L, 32R, and have first folded portions 35L, 35R adjacent to the base ends 31L, 31R, and second folded portions 36L, 36R adjacent to the tape bases 32L, 32R.
[0053] The first folded-back portions 35L, 35R are folded back at the edges ES of the side flap portions 11L, 11R in the direction opposite to the protruding direction of the tape base portions 32L, 32R, and extend from the base ends 31L, 31R to a position P4 of a predetermined length L4 from the edges ES of the side flap portions 11L, 11R on the non-skin-facing side of the cover sheet 4. The first folded-back portions 35L, 35R are joined to the cover sheet 4 with an adhesive.
[0054] The second folded portions 36L, 36R are folded back at position P4 in the protruding direction of the tape bases 32L, 32R, and extend from the first folded portions 35L, 35R to the edges ES of the side flap portions 11L, 11R. That is, the second folded portions 36L, 36R overlap the first folded portions 35L, 35R. The second folded portions 36L, 36R are connected to the tape bases 32L, 32R at the edges ES of the side flap portions 11L, 11R.
[0055] The auxiliary connecting parts 34L, 34R extend from a position P5, a predetermined length L5 (L5>L4) from the edge ES of the side flap parts 11L, 11R of the cover sheet 4, beyond the second folded parts 36L, 36R and the tape bases 32L, 32R in the protruding direction of the tape bases 32L, 32R. The auxiliary connecting parts 34L, 34R are bonded to the cover sheet 4, the second folded parts 36L, 36R and the tape bases 32L, 32R with an adhesive. This connects the side flap parts 11L, 11R and the tape bases 32L, 32R.
[0056] The base end 31L, 31R extends from the edge ES of the side flap portion 11L, 11R of the side sheet 8L, 8R to a position P6 of a predetermined length L6 (L6>L4). In this way, the base end 31L, 31R is longer than the first folded portion 35L, 35R. In the structure of the tape 30L, 30R shown in FIG. 8, the base end 31L, 31R extends to a part of the side flap portion 11L, 11R, but is not limited to this structure. For example, the base end 31L, 31R may extend to the entire side flap portion 11L, 11R, that is, from the edge ES on the tape 30L, 30R side to the edge on the top sheet 7 side in the side flap portion 11L, 11R.
[0057] Furthermore, the base ends 31L, 31R are longer than the portions (length L5) of the auxiliary connecting portions 34L, 34R that are joined to the side flap portions 11L, 11R and the second folded-back portions 36L, 36R.
[0058] Sheets 37L, 37R such as plastic films are bonded with adhesive to the skin-facing surfaces of the tips of the auxiliary connecting parts 34L, 34R. The tips of the auxiliary connecting parts 34L, 34R including the sheets 37L, 37R function as handles when attaching the tapes 30L, 30R to the front patch 30F described below. The sheets 37L, 37R are preferably colored so that they can be easily recognized by the wearer as handles.
[0059] In addition, an adhesive is applied to the skin-facing surface of the auxiliary connecting parts 34L, 34R between the tape base parts 32L, 32R and the sheets 37L, 37R, and these parts become the adhesive parts 38L, 38R (an example of an "adhered part" of the "tape" in this application). The adhesive parts 38L, 38R can be attached to the front patch 30F shown in FIG. 9 (an example of an "adhered part" in this application). The front patch 30F is formed from a sheet member such as a plastic film with a flat surface that does not have a loop part, unlike the front patch 2F which has a loop part. The tapes 30L, 30R are attached to the front body region 1F of the diaper 1 by adhering the attachment portions 38L, 38R to the front patch 30F.
[0060] In addition, the combined length of the auxiliary connecting parts 34L, 34R, which is the end part to which the sheet members 37L, 37R are joined, and the adhesive parts 38L, 38R, is approximately the same as the base end parts 31L, 31R (length L6). Therefore, when the auxiliary connecting parts 34L, 34R are folded back toward the inside in the width direction of the diaper 1 at the edges ES of the side flap parts 11L, 11R, the adhesive parts 38L, 38R are adhered to the base end parts 31L, 31R. This allows the auxiliary connecting parts 34L, 34R to be temporarily fixed to the base end parts 31L, 31R, and prevents the adhesive parts 38L, 38R from being attached to the side sheets 8L, 8R, the top sheet 7, etc. before the diaper 1 is used.
[0061] Next, the functions of the folding portions 33L, 33R and the auxiliary connecting portions 34L, 34R will be described with reference to Fig. 9. When the diaper 1 is put on a wearer, the adhesive portions 38L, 38R of the tapes 30L, 30R are adhered to the front patch 30F, thereby attaching the tapes 30L, 30R to the front patch 30F. This connects the front body region 1F and the back body region 1R of the diaper 1. At this time, when the tapes 30L, 30R are viewed from the non-skin facing side, the auxiliary connecting portions 34L, 34R of the tapes 30L, 30R are visible as shown in Fig. 9(A).
[0062] As described above, the front body region 1F and the back body region 1R may be connected tightly by the tapes 30L, 30R. However, the tapes 30L, 30R of the other example have the folded parts 33L, 33R interposed between the base ends 31L, 31R and the tape bases 32L, 32R. Therefore, when a load of a predetermined magnitude or more is applied to the connected parts due to the expansion of the wearer's abdomen, the first folded parts 34L, 34R of the folded parts 33L, 33R are peeled off from the side flap parts 11L, 11R (cover sheet 4). As a result, the folded folded parts 33L, 33R (the first folded parts 35L, 35R and the second folded parts 36L, 36R) are pulled out to the inside in the width direction of the diaper 1, as shown in FIG. 9(B). As a result, the tapes 30L, 30R have a slack corresponding to the length of the first folded-back portions 35L, 35R and the second folded-back portions 36L, 36R, and the side flap portions 11L, 11R can move outward in the width direction of the diaper 1 as shown by the arrows in FIG. 9(B). This reduces the load on the connecting portion, making it difficult for the tapes 30L, 30R and the front patch 30F to come off. Furthermore, the wearer's movements are less likely to be transmitted to the rear body region 1R, so that the influence of the wearer's movements on the connecting portion can be reduced. On the other hand, the front body region 1F can easily follow the wearer's movements, so that the interference with the wearer's movements due to the connection can be suppressed.
[0063] Furthermore, the tapes 30L, 30R have auxiliary connecting parts 34L, 34R that connect the side flap parts 11L, 11R and the tape base parts 32L, 32R. Therefore, when a load due to expansion is applied to the connecting parts by a predetermined amount or more, the auxiliary connecting parts 34L, 34R stretch and can absorb a part of the load applied to the connecting parts. As a result, the load applied to the connecting parts is further alleviated, and the attached parts of the tapes 30L, 30R and the front patch 30F can be made even more difficult to come off.
[0064] In addition, in the tapes 30L, 30R, the base ends 31L, 31R are longer than the first folded-back portions 35L, 35R, and are also longer than the portions of the auxiliary connecting portions 34L, 34R that are joined to the side flap portions 11L, 11R and the second folded-back portions 36L, 36R. By making the base ends 31L, 31R relatively long in this manner, the joining force between the base ends 31L, 31R and the side flap portions 11L, 11R (side sheets 8L, 8R) can be increased. This allows the joining force to be increased when a load due to expansion of a predetermined magnitude or more is applied to the connecting portions. In this case, even if the first folded portions 35L, 35R are peeled off from the side flap portions 11L, 11R, it is possible to prevent the base ends 31L, 31R from also peeling off from the side flap portions 11L, 11R, thereby preventing the connection between the tapes 30L, 30R and the side flap portions 11L, 11R from being disconnected.
[0065] <Other embodiments> Next, other embodiments will be described. In the diaper 1 according to the above embodiment and other examples, the side flap portions 11L, 11R are arranged in the rear body region 1R, and the tapes 2L, 2R, 30L, 30R connected to the side flap portions 11L, 11R are attached to the front body region 1F and fixed to the wearer's waist, but the manner of fixing the wearer's waist is not limited to this. For example, the diaper 1 may be arranged such that the side flap portions 11L, 11R are arranged in the rear body region 1R, and the tapes 2L, 2R, 30L, 30R connected to the side flap portions 11L, 11R are attached to the rear body region 1R and fixed to the wearer's waist. In this configuration, the attached portion is arranged on the rear body region 1R side.
[0066] In the diaper 1 according to the above embodiment, the hook portions 22L, 22R of the tapes 2L, 2R are engaged with the loop portions of the front patch 2F to attach the tapes 2L, 2R to the front patch 2F, but the manner of attachment of the tapes 2L, 2R to the front patch 2F is not limited thereto. For example, by replacing the hook portions 22L, 22R of the tapes 2L, 2R and the loop portions of the front patch 2F as in the diaper 1 according to the above other example, an adhesive portion coated with an adhesive may be provided on the skin-facing side of the tape bases 21L, 21R other than the tip portions that function as tabs, and a front patch 2F having a flat surface and no loop portions may be used, and the adhesive portions of the tapes 2L, 2R may be attached to the front patch 2F, so that the tapes 2L, 2R are attached to the front patch 2F. Furthermore, in the diaper 1 according to the above-mentioned alternative embodiment, the adhesive portions 38L, 38R of the tapes 30L, 30R are adhered to the front patch 30F having a flat surface, thereby attaching the tapes 30L, 30R to the front patch 30F, but the manner of attachment of the tapes 30L, 30R to the front patch 30F is not limited thereto. For example, by replacing the adhesive portions 38L, 38R of the tapes 30L, 30R and the flat surface of the front patch 30F, as in the diaper 1 according to the above-mentioned embodiment, a hook portion may be provided on a skin-facing surface of a portion of the auxiliary connecting portions 34L, 34R on the sheet 37L, 37R side between the tape bases 32L, 32R and the sheets 37L, 37R, and a front patch 30F having a loop portion may be used, and the hook portion of the tapes 30L, 30R may be engaged with the loop portion of the front patch 30F, thereby attaching the tapes 30L, 30R to the front patch 30F.
[0067] In the diaper 1 according to the above embodiment or other example, the front patch 2F, 30F is provided in the front body region 1F, but the front patch 2F, 30F may not be provided in the front body region 1F, and the hook portions 22L, 22R or the adhesive portions 38L, 38R may be capable of engaging with or adhering to a part of the cover sheet 4 in the front body region 1F (an example of an "adhered portion" of the "absorbent article" in this application). For the diaper 1 not provided with the front patch 2F, 30F, the hook portions 22L, 22R or the adhesive portions 38L, 38R are engaged with or adhered to a part of the cover sheet 4 of the diaper 1, thereby attaching the tapes 2L, 2R, 30L, 30R to the cover sheet 4. [Explanation of symbols]
[0068] 1. Diapers 1B...Inseam area 1F: Front body area 1R: Back body area 2F, 30F: Front patch 2L, 2R, 30L, 30R Tape 3BL, 3BR: 3D gathers 3R: Waist gather 4. Cover sheet 4KL, 4KR... Constriction 4C, 4SL, 4SR, 8EL, 8ER, 9ER Elastic material 5. Back sheet 6C··Absorbent 7. Top sheet 8L, 8R side seats 10L, 10R: Leg area 11L, 11R: Side flap section 20L, 20R, 31L, 31R... Base end 21L, 21R, 32L, 32R Tape base 22L, 22R Hook section 23L, 23R, 33L, 33R... Folding section 24L, 24R, 34L, 34R...Auxiliary adhesive part 25L, 25R, 35L, 35R...First fold 26L, 26R, 36L, 36R...Second fold 37L, 37R ·· Seat 38L,38R·Adhesive part
Claims
1. An absorbent article to be worn under the crotch of a wearer, an absorbent body disposed in a portion of the absorbent article corresponding to the crotch area of the wearer; A first sheet is disposed closer to the wearer than the absorbent body and comes into contact with the wearer's skin; A second sheet is disposed on the side opposite to the wearer from the absorbent body and forms an exterior surface of the absorbent article; a tape protruding from the left and right ends of one of the regions of the absorbent article corresponding to the abdomen and the back of the wearer, the tape having an adhesive portion formed on the surface facing the wearer; an attachment portion provided on the exterior surface of the other part of the absorbent article, to which the attachment portion is attached; Equipped with The tape has a base end portion bonded to either one of the wearer side surface and the opposite side surface of the left and right end portions, a protruding portion protruding from the edge of the left and right end portions, and a folded portion interposed between the base end portion and the protruding portion, The folding portion includes a first folded portion that is folded back at the edges of the left and right ends in a direction opposite to the protruding direction of the protruding portion, extends from the edges of the left and right ends to a position of a predetermined length, and is bonded to the other surface of the left and right ends, and a second folded portion that is folded back at the position of the predetermined length in the protruding direction, extends to the edges of the left and right ends, and overlaps with the first folded portion; the tape extends from the left and right ends in the protruding direction beyond the second folded-back portion to a part of the protruding portion, and is bonded to the other surface of the left and right ends, a surface of the second folded-back portion opposite to the first folded-back portion, and a surface of the part of the protruding portion facing the wearer, and has auxiliary connection portions that connect the left and right ends and the protruding portion; The adhesive portion is formed on the wearer-facing surface of the protrusion. Absorbent articles.
2. The absorbent article according to claim 1 , wherein the portions of the auxiliary connecting parts bonded to the left and right ends and the second folded-back part are longer than the base end part.
3. An absorbent article to be worn under the crotch of a wearer, an absorbent body disposed in a portion of the absorbent article corresponding to the crotch area of the wearer; A first sheet is disposed closer to the wearer than the absorbent body and comes into contact with the wearer's skin; A second sheet is disposed on the side opposite to the wearer from the absorbent body and forms an exterior surface of the absorbent article; a tape protruding from the left and right ends of one of the regions of the absorbent article corresponding to the abdomen and the back of the wearer, the tape having an adhesive portion formed on the surface facing the wearer; an attachment portion provided on the exterior surface of the other part of the absorbent article, to which the attachment portion is attached; Equipped with The tape has a base end portion bonded to either one of the wearer side surface and the opposite side surface of the left and right end portions, a protruding portion protruding from the edge of the left and right end portions, and a folded portion interposed between the base end portion and the protruding portion, The folding portion includes a first folded portion that is folded back at the edges of the left and right ends in a direction opposite to the protruding direction of the protruding portion, extends from the edges of the left and right ends to a position of a predetermined length, and is bonded to the other surface of the left and right ends, and a second folded portion that is folded back at the position of the predetermined length in the protruding direction, extends to the edges of the left and right ends, and overlaps with the first folded portion; the tape extends from the left and right ends in the protruding direction beyond the second folded-back portion and the protruding portion, and is bonded to the other surface of the left and right ends, a surface of the second folded-back portion opposite the first folded-back portion, and a surface of the protruding portion opposite the wearer, and has auxiliary connection portions that connect the left and right ends and the protruding portion; The adhesive portion is formed on a surface of the auxiliary connecting portion that faces the wearer and extends beyond the protruding portion. Absorbent articles.
4. The absorbent article according to claim 3 , wherein the base end portion is longer than the portions of the auxiliary connecting portion that are bonded to the left and right ends and the second folded-back portion.
5. The absorbent article according to claim 1 , wherein the base end portion is longer than the first folded-back portion.
Citation Information
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