JP2009207778A - Absorbent article - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an absorbent article with pocket which prevents the leakage of excretory matter from the waist part of a wearing person and is preferably used without becoming bulky in his/her lower back part. <P>SOLUTION: A tape type disposable diaper 1 includes a pair of stereoscopic gathers 26a, 26b along both side parts. One or more elastic members (stereoscopic gather elastic members 36) are arranged in the free end parts 26j of the stereoscopic gathers 26a, 26b. A back side pocket 50 to be opened toward the front surface side center of the absorbent article is formed along a back side part end on the back side of the diaper. One or more elastic members (pocket elastic members 51) are arranged in the free end part 50j of the back side pocket 50. At least the elastic members of the free end parts 26j of the stereoscopic gathers 26 or the elastic members of the free end part 50j of the back side pocket 50 are/is arranged or not arranged in a non-extension state in an area where the stereoscopic gathers 26 are superimposed on the back side pocket 50. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an absorbent article. More specifically, an absorbent body, a top sheet disposed so as to cover the surface of the absorbent body, and a back sheet disposed so as to cover the back surface of the absorbent body, It is comprised from each part of a back side part, has a pair of solid gathers along the longitudinal direction of an absorbent article, and relates to the absorbent article which has a back side pocket at least in a back side part.

  Conventionally, various disposable diapers have been proposed in order to prevent leakage of excrement from the legs and the waist. For example, a structure in which leg gathers are arranged along the both sides of the absorbent body of the absorbent article, that is, the leg-surrounding part of the crotch, is generally used to prevent leakage from the leg-surrounding part. Moreover, the structure etc. which arrange | position a waist gather in a waist part, raise the fit property of the waist circumference to a wearer by the elasticity of a waist gather, and prevent the leakage of excrement are disclosed. However, leg gathers and waist gathers alone are not sufficient as a leakage prevention effect because excrement leaks from between the gather's ridges. Therefore, a structure has been disclosed in which a three-dimensional gather that rises three-dimensionally on both sides of the absorber at the crotch and a back flap on the back side. Thereby, a leak-proof wall can be built in a crotch part and a back side part, and a leak can be prevented. However, the dorsal flap cannot stand up autonomously and has insufficient leakage preventing effect. Therefore, a structure is disclosed in which the back flap and the three-dimensional gather are combined so that the back flap also rises as the three-dimensional gather rises. Thereby, the integral leak-proof wall was formed from the excretion site | part of the absorbent article, and the leak prevention effect could also be improved. However, since the back flap does not stand up independently, there is a problem that the flap portion may be crushed depending on the posture of the wearer and may not function as a sufficient leakage barrier. Then, the structure which arrange | positions an elastic member to a back side flap, gives elasticity and forms the back side pocket which stands | starts in three dimensions was disclosed (refer patent documents 1-4).

Japanese Patent No. 2517622 Utility Model Registration No. 2525656 Japanese Patent No. 3493211 Utility Model Registration No. 2602070

  However, when joining these back pockets and three-dimensional gathers to form an integral structure in which a gap is less likely to be formed, or to join the overlapping portions of the two without gaps, the elastic members are formed at the positions where both sheets are disposed. In addition to the double heel part, the joints and the like increased the stiffness, and the wear feeling deteriorated, and depending on the wearer, there were problems such as hurting the skin.

  An object of the present invention is to provide an absorbent article with a pocket that has a high function of preventing leakage of excrement from the wearer's leg circumference and waist, and can be suitably used without being stiff at the waist. .

  The inventor has arranged that the elastic member of the free end portion of the three-dimensional gather and the elastic member of the free end portion of the back side pocket are arranged in a region where at least one of the three-dimensional gather and the back side pocket overlaps, or is not arranged. It has been found that the above-described problems can be solved by adopting the configuration described above. That is, according to the present invention, the following absorbent articles are provided.

[1] An absorber, disposed so as to cover the surface of the absorber, at least a part of which is made of a liquid-permeable material, and disposed so as to cover the back surface of the absorber. In an absorbent article comprising a back sheet made of an absorbent material and comprising each part of the abdomen, crotch, and back side, at least a pair of three-dimensional gathers are formed along both sides of the absorbent article In the three-dimensional gather, one or more elastic members are arranged at the free end thereof, and at least the back side of the absorbent article is on the surface side of the absorbent article along the back side end. A back pocket opening toward the center is formed, and at least one elastic member is disposed at a free end portion of the back side pocket, and the elastic member at the free end portion of the three-dimensional gather The dorsal port Wherein the free end of Tsu DOO elastic member, the absorbent article at least one in the overlapping region of the three-dimensional gathers and the back side pocket disposed undeployed, or in a non-stretched state.

[2] The absorption according to [1], wherein in the region where the three-dimensional gather and the back pocket overlap, an interjoining region is formed in which the three-dimensional gather and the standing wall portion of the back pocket are joined together. Sex goods.

[3] The absorbent article according to [2], wherein the mutual joining region is formed on an arrangement position of at least a part of the elastic member arranged in the three-dimensional gather or a longitudinal extension line of the arrangement position.

[4] In the region where the three-dimensional gather and the back pocket overlap, the free end of the back pocket and the free end of the three-dimensional gather are non-joined over 2 to 20 mm. The absorbent article according to any one of [1] to [3], wherein a region is formed.

  By placing elastic members at the free ends of the three-dimensional gather and the back pocket, each can stand up independently, so that it surrounds the absorbent area of the absorbent article regardless of the posture and movement of the wearer Because it can build an efficient leak-proof wall, it exhibits high leakage prevention function. In addition, at least one of the elastic member at the free end of the three-dimensional gather and the elastic member at the free end of the back pocket should be arranged in a non-extended or non-extended state in the region where the three-dimensional gather and the back pocket overlap. Thus, it is possible to prevent a stiff feeling and a rash due to the shrinkage of the three-dimensional gather and the back pocket in the overlapping region, and a comfortable wearing feeling can be obtained.

  Furthermore, the joining region of the three-dimensional gather and the back pocket is formed so as to include the extension line of the elastic member arranged on both sheets, so that the elastic member of each sheet expands and contracts according to the movement of the wearer. At that time, the stress of the elastic member of one sheet is transmitted to and interlocked with the elastic member of the other sheet without escaping, so that both the sheets work more integrally and a high leakage prevention effect can be exhibited.

  Hereinafter, the best mode for carrying out the absorbent article of the present invention will be specifically described taking a one-piece type tape-type diaper as an example. However, the present invention broadly encompasses absorbent articles having the invention specific items, and is not limited to the following embodiments.

  In the present specification, “tape-type diaper” means, as in the tape-type diaper 1 shown in FIG. 1, the absorbent body 22, the top sheet 18 at least partly made of a liquid-permeable material, and liquid-impermeable. A back sheet 20 made of material, and composed of a front body 2, a crotch 4 and a back body 6, and arranged so as to extend from the left and right side edges 6 a and 6 b of the back body 6. A disposable diaper further comprising a fastening tape 10 for fixing the back body 6 to the front body 2 is meant.

  The “one-piece type” includes a top sheet, a back sheet, and an absorbent body. An absorbent body that has an absorption / holding function is interposed (built in) between the top sheet and the back sheet, so that the mounting function is provided. This means a diaper of a type integrally formed with a top sheet and / or a back sheet.

  In addition, in this specification, “front body” means a part that covers the abdomen (front of the body) of the wearer when a diaper is worn on the wearer, and “inseam” means that the wearer wears a diaper. When the wearer wears a diaper, the part covering the inseam of the wearer means the part covering the back side (back of the body) of the wearer.

[1] Configuration of the tape-type disposable diaper of the present invention:
As shown in FIG. 1, a tape-type disposable diaper 1 as an embodiment of the absorbent article of the present invention is disposed so as to cover the absorbent body 22 and the surface of the absorbent body 22, and at least a part thereof is liquid permeable. Each of the front body 2, the crotch 4, and the back body 6 is provided with a top sheet 18 made of a conductive material and a back sheet 20 made of a liquid-impermeable material. And is provided so as to extend from the left and right side edges of the back body 6, and further includes a fastening tape 10 for fixing the front body 2 and the back body 6.

  At least a pair of three-dimensional gathers 26a and 26b are formed along both side portions of the tape-type disposable diaper 1, and the three-dimensional gathers 26a and 26b have one or more elastic members (three-dimensional gather elastic) at their free ends 26j. A member 36) is arranged. Further, at least on the back side of the tape-type disposable diaper 1, a back side pocket 50 opening toward the center of the surface side of the absorbent article is formed along the back side end, and the free end of the back side pocket 50 is formed. One or more elastic members (pocket elastic members 51) are arranged in the portion 50j. The elastic member of the free end portion 26j of the three-dimensional gather 26 and the elastic member of the free end portion 50j of the back side pocket 50 are arranged in an overlapping region of the three-dimensional gather 26 and the back side pocket 50 in a non-expanded state (so-called snapback ) Or non-arrangement.

[1-1] Back pocket:
The dorsal pocket is formed in a rectangular shape and is disposed along the dorsal end portion on at least the dorsal side of the disposable diaper. And the back side part edge part and the both sides of the width direction are joined to the top sheet | seat side, and the center side edge part is opened toward the surface side center as a free edge part.

  The back pocket is preferably composed of a plastic sheet, a pocket sheet such as a hydrophobic non-woven fabric, or a laminated sheet thereof so that the excrement of the wearer does not leak out. Further, in order to prevent the excrement from leaking, the width of the back pocket is formed wider than the free end of the three-dimensional gather.

  The back pocket will be further described with reference to FIGS. The back side pocket 50 is disposed along the back side end portion as an external attachment from above the three-dimensional gather 26. The back side pocket 50 has a joint portion 52 formed on the back side end portion and both sides in the width direction so as to be joined to the top sheet 18 side, and the center side end portion as a free end portion 50j toward the surface side center. It is open. A pocket elastic member 51, which is at least one elastic member, is disposed at the free end 50j that forms the opening. By the pocket elastic member 51, the standing wall portion 50w is erected on the free end portion 50j side.

  In a region where the three-dimensional gather 26 and the upright wall portion 50w of the back pocket 50 overlap each other, a mutual junction region joined to each other is formed. The mutual joining region is formed on the longitudinal extension line of the arrangement position of the elastic member (three-dimensional gather elastic member 36) arranged in the three-dimensional gather 26. By comprising in this way, when the elastic member of each sheet expands and contracts according to the movement of the wearer, the stress of the elastic member of one sheet is transmitted to and interlocked with the elastic member of the other sheet without escaping. In addition, the two sheets work together so that the excrement of the wearer can be easily taken into the back pocket 50 and the excrement can be prevented from leaking from the gap.

  Furthermore, in the region where the three-dimensional gather 26 and the back pocket 50 overlap, the free end portion 50j of the back side pocket 50 and the free end portion 26j of the three-dimensional gather 26 have a non-joining region with a width of 2 to 20 mm along the free end portion. Is formed. By constituting in this way, in the back side pocket sheet and the three-dimensional gathered sheet folded so as to wrap the elastic member, the mutual joining region is not formed in the vicinity of the part that is stretched by folding (see FIG. 3B). In addition, the free end is less stiff, and the feeling of wear is improved. In addition, since the elastic member does not hinder expansion and contraction at the free end, the rise of the three-dimensional gather 26 and the back pocket 50 is improved, and the function as a leakage barrier can be enhanced.

  As shown in FIG. 1, the back pocket 50 can be arranged as an external paste from above the three-dimensional gather 26, but may be arranged as an internal paste under the three-dimensional gather 26 (see FIG. 7). In the case where it is arranged as an external attachment, the manufacture is easy. When placed as an internal paste, the appearance can be made beautiful.

  By disposing elastic members at the free ends of the three-dimensional gather 26 and the back pocket 50, each can stand up independently and surround the absorbent region of the absorbent article regardless of the posture and movement of the wearer. In this way, an effective leak-proof wall can be built, so that a high leak-proof function is exhibited. In addition, by forming an area where the three-dimensional gather 26 and the back pocket 50 are connected to each other, an integral leakage barrier can be formed, and the excrement of the wearer can be easily taken into the three-dimensional gather 26 and the back pocket 50. In addition, it is possible to prevent excrement from leaking from the gap. Further, an elastic member is arranged at the free end of each of the three-dimensional gather 26 and the back pocket 50, and an elastic member is arranged so as to be substantially substantially continuous with the outer periphery of the free end, so that a three-dimensional leakage breaker is formed. Even though it is formed, the pocket elastic member 51 and the three-dimensional gather elastic member 36 are arranged so that they do not overlap with each other, so that the waist does not wrinkle in the vertical and horizontal directions and feels stiff. It is possible to make a diaper with a good wearing feeling without being damaged.

  In addition, while arrange | positioning so that the pocket elastic member 51 and the three-dimensional gather elastic member 36 may overlap, you may comprise these so that at least one may be arrange | positioned in the non-expanded state in the overlapping area | region. When the elastic members such as the pocket elastic member 51 and the three-dimensional gather elastic member 36 are attached in an extended state, the elastic member tends to contract. Therefore, the member to which the elastic member is attached in this portion, that is, the back pocket 50 or the three-dimensional The gather 26 contracts. In the region where the back pocket 50 and the three-dimensional gather 26 overlap, if contraction of both occurs, it will give a feeling of stiffness at the waist of the wearer, causing discomfort, and depending on the wearer, It may hurt the skin. On the other hand, by configuring as in the present invention, in the region where the back pocket 50 and the three-dimensional gather 26 overlap each other, the wearer feels stiff by contracting so as to wave from both directions. This can be prevented. That is, it is possible to give a comfortable wearing feeling.

  FIG. 5 shows an example of the back pocket 50 formed with a narrower width than between the standing lines 46a and 46b of the three-dimensional gathers 26a and 26b. The three-dimensional gather elastic member 36 disposed in the three-dimensional gather 26 is disposed so as to extend to the back side end portion side of the free end portion 50j of the back side pocket 50. The pocket elastic member 51 is arranged in a stretched state in a range shorter than between the free ends 26j and 26j of the three-dimensional gathers 26a and 26b. Since the elastic member 36 of the three-dimensional gather 26 enters the back side pocket 50, the back side pocket 50 is easily raised by the rising force of the three-dimensional gather 26. Moreover, since the back side pot sheet 50 is formed narrowly, an excessive thickness is not formed on the back side of the sheet of the portion that is not three-dimensionally formed with the dam, and the wear feeling is excellent.

  Next, FIG. 6 shows another example of the dorsal pocket 50 formed with a narrower width than between the standing lines 46a and 46b of the three-dimensional gathers 26a and 26b. Two elastic members of the three-dimensional gather 26 and the back side pocket 50 are arranged respectively. Further, the three-dimensional gather elastic member 36 arranged in the three-dimensional gather 26 is arranged in an expanded state only on the center side with respect to the free end portion 50j of the back side pocket 50, and is not arranged in a region overlapping with the back side pocket 50. Or, it is not stretched. The pocket elastic member 51 is arranged in a stretched state in a shorter range than between the free ends 26j and 26j of the three-dimensional gathers 26a and 26b, and the pocket elastic member 51 and the three-dimensional gather elastic member 36 are both in the mutual joining region. Non-arranged or non-stretched.

  The elastic members of the three-dimensional gather 26 and the back pocket 50 are arranged in an extended state at their free ends, and the integral weir formed by the three-dimensional gather 26 and the back pocket 50 extends almost continuously on the outer periphery. In the region where both sheets overlap while being surrounded by the stretchable elastic member, it is not stretched or not arranged, so that no wrinkles are formed in the thick region of the sheet, and it is excellent in wearing feeling Yes. Furthermore, the joining area | region of the three-dimensional gather 26 and the back side pocket 50 is formed so that it may include on the extended line of at least one part of the elastic member arrange | positioned at both sheets, and each sheet | seat according to a wearer's motion. When the elastic member of the sheet expands and contracts, the stress of the elastic member of one sheet is transmitted to and interlocked with the elastic member of the other sheet, so that both the sheets work together and exhibit a high leakage prevention effect. Yes.

  Further, FIG. 7 shows an example in which the back pocket 50 is disposed as an inner paste under the three-dimensional gather 26. The three-dimensional gathered elastic member 36 arranged in the three-dimensional gather 26 is arranged in a stretched state only at the center side of the free end portion 50j of the back pocket 50, and the pocket elastic member 51 is formed by the three-dimensional gathers 26a and 26b. The pocket elastic member 51 and the three-dimensional gathered elastic member 36 are both arranged in a non-arranged or non-extended state in the mutual joining region, being arranged in a stretched state in a range shorter than between the free ends 26j, 26j. On the back side, the end of the seat of the back pocket 50 is not exposed, so that not only the appearance is good, but also the wearer is less likely to feel the step of the seat, and the wearing feeling is excellent. Further, in the manufacturing process, the back pocket 50 is narrower than the standing line width at the standing line portion where the side sheet 18b forming the center sheet 18a and the three-dimensional gather 26 is attached. Since it does not hang on a line part, there also exists an advantage that joining of a standing wire becomes easy.

  As described above, the back pocket 50 can be formed wider than the upright lines 46a and 46b of the three-dimensional gather 26, or can be formed narrower. Moreover, the back side pocket 50 may arrange | position the pocket sheet | seat which comprises it from the upper surface side of the three-dimensional gather 26, and may arrange | position from the lower surface side. The back pocket 50 may be provided with a waist-side elastic member 42 to form a backside gather. In the drawing, the back pocket 50 has the back side and the end portion of the disposable diaper aligned with each other. However, the back side pocket 50 may not be necessarily aligned and may be disposed only at a position where the pocket can be formed on the back side.

[1-2] Absorber:
The absorber is a member for absorbing and holding the wearer's urine. The absorber is made of an absorbent material because it needs to absorb and retain the wearer's urine and body fluid.

  Examples of the absorbent material constituting the absorber include conventionally known absorbent materials usually used for disposable diapers and other absorbent articles, such as fluff pulp, super absorbent polymer (Super Absorbent Polymer; hereinafter referred to as “SAP”). And a hydrophilic sheet. It is possible to use wood pulp or non-wood pulp defibrated as fluff pulp, sodium polyacrylate as SAP, tissue, absorbent paper, hydrophilized nonwoven fabric as hydrophilic sheet preferable.

  These absorbent materials are usually used as a single-layer or multi-layer mat. Under the present circumstances, 1 type may be used independently among the said absorptive materials, and 2 or more types may be used together. Especially, what used together about 10-500 mass parts SAP with respect to 100 mass parts of fluff pulp is preferable. At this time, the SAP may be uniformly mixed in each mat of fluff pulp, or may be arranged in layers between the layers of the multilayer fluff pulp.

  It is preferable that the absorber is interposed at least in part between the top sheet and the back sheet. Usually, the absorber is interposed between the top sheet and the back sheet by being sandwiched between the top sheet and the back sheet and sealing the peripheral edge thereof. Therefore, the flap part in which the absorber is not interposed is formed between the top sheet and the back sheet at the peripheral part of the absorber. The absorber is interposed in at least a part between the top sheet and the back sheet. More specifically, the absorbent body may be interposed at least in the crotch region, and the absorbent body may extend to the front body and the back body.

  It is preferable that the absorber is entirely wrapped with a hydrophilic sheet. Such a configuration has an advantage that SAP can be prevented from leaking from the absorber and shape stability can be imparted to the absorber.

  Although there is no restriction | limiting in particular about the shape of an absorber, The shape used in the conventional disposable diaper and other absorbent articles, for example, a rectangular shape, an hourglass type, a gourd type, a T shape etc. can be mentioned. The tape-type diaper 1 shown in FIG. 1 is an example in which an hourglass-type absorber is used as the absorber 22.

  In addition, a sheet (second sheet) for diffusing liquid such as urine and body fluid may be incidentally disposed on the surface side of the absorber (for example, between the absorber and the top sheet). . When this second sheet is attached, due to the wearer's posture, etc., even when the space on the back side of the top sheet is not sufficiently formed, the absorption rate of urine, body fluid, etc. is difficult to decrease, and the absorption rate decreases. It is possible to prevent leakage of urine and body fluids.

  Examples of the material constituting the second sheet include hydrophilic and liquid-permeable materials such as woven fabric, non-woven fabric, porous plastic, and fluff pulp. Examples of these constituent materials include polypropylene, polyethylene, polyester, rayon, pulp, and composite fibers thereof. As the pulp, crimped fibers such as curly cellulose fibers can be suitably used.

[1-3] Top sheet:
A top sheet is a sheet | seat arrange | positioned so that the surface (surface located in a wearer's skin side at the time of mounting | wearing of a diaper) may be coat | covered. At least a part (all or a part) of the top sheet is made of a liquid-permeable material because the absorber disposed on the back surface side needs to absorb the wearer's urine. Usually, at least near the surface of the absorber, it is made of a liquid-permeable material that can permeate the wearer's urine and body fluid. As long as at least a part is made of the liquid permeable material, the entire top sheet is not necessarily made of the liquid permeable material.

  Examples of the liquid permeable material constituting the top sheet include a woven fabric, a nonwoven fabric, and a porous film. Among these, it is preferable to use a non-woven fabric made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon and subjected to a hydrophilic treatment. There is no restriction | limiting in particular also about the kind of nonwoven fabric, The conventionally well-known nonwoven fabric manufactured by various manufacturing methods, such as air through (card hot air), card | curd embossing, and a spun bond, can be used suitably.

  The top sheet may be composed of a single sheet material, but may be composed of a plurality of sheet materials. For example, the form which comprises the top sheet arrange | positioned at the surface side of an absorber and the top sheet arrange | positioned in the part of a side flap by a different sheet | seat is also utilized frequently. The tape-type diaper 1 shown in FIG. 1 has a top sheet 18 (center sheet 18a) made of a liquid-permeable material at the center of the diaper, and the side flap 8 part of the diaper is resistant to liquid permeation. It is the example which has arrange | positioned the top sheet 18 (side sheet 18b) which consists of ventilation water-repellent material which shows.

[1-4] Backsheet:
A backsheet is a sheet | seat arrange | positioned so that the back surface (surface located in a wearer's clothing side at the time of mounting | wearing of a diaper) may be coat | covered. The back sheet is made of a liquid-impermeable material because it is necessary to prevent the wearer's urine from leaking outside the diaper. Although there is no restriction | limiting in particular about the arrangement | positioning method, For example, the structure which arrange | positions the back seat | sheet 20 so that it may correspond with the external shape of a diaper like the tape-type diaper 1 shown in FIG. However, it is not always necessary to adopt such a configuration. From the viewpoint of preventing leakage of urine absorbed by the absorber 22, at least a portion where the absorber 22 exists is a back sheet 20 made of a liquid-impermeable material. May be arranged.

  Examples of the liquid-impermeable material constituting the backsheet include a liquid-impermeable film made of a resin such as polyethylene. Among these, a microporous polyethylene film is preferably used. This microporous polyethylene film has a large number of fine pores of 0.1 to several μm, and is liquid impervious but has moisture permeability, so that the inside of the diaper can be prevented from being steamed There is.

  Note that a sheet material (cover sheet) may be bonded to the outer surface of the back sheet. This cover sheet is used to reinforce the back sheet and to improve the touch (feel).

  Examples of the material constituting the cover sheet include woven fabric and non-woven fabric. Especially, it is preferable to use the dry nonwoven fabric and wet nonwoven fabric which consist of thermoplastic resins, such as polyethylene, a polypropylene, and polyester.

[1-5] Fastening tape:
The fastening tape is a tape-like fastener for fixing the back body and the front body, which is disposed at least one each on the left and right side edges of the back body of the diaper. By fastening this fastening tape to the fastening region formed in the front body, the entire diaper can be made into a pants type, and the diaper can be attached to the wearer. Usually, this fastening tape is disposed so as to extend from the left and right side edges of the back body of the diaper.

  The fastening tape has a fastening portion (formed on the front body of the diaper) and a fastener portion that can be fixed to the tape piece. That is, a fastener that can be fixed to the fastening region is attached. There are no particular restrictions on the form of the fastener as long as it can be fixed to the fastening region, but usually (1) an adhesive fastener that is fixed by the adhesive force of the adhesive, and (2) a convex member (hook) and a concave material A mechanical fastener (also referred to as a planar fastener) that is fixed by mechanical coupling of (loop) can be suitably used. The mechanical fastener includes, for example, a convex member (hook) having a large number of protrusions (such as hooks, mushrooms, hooks, etc.) formed on the surface, and a concave member (loop) having looped fibers disposed on the surface. A combination is often used. In this fastener, the hooks are overlapped on the surface of the loop, and a large number of protrusions of the hook are engaged with the surface of the loop, so that both members can be peeled and firmly bonded. .

  For example, the tape-type diaper 1 shown in FIG. 1 is an example in which a mechanical fastener is used as the fastener of the fastening tape 10. In this example, a fastener portion 44 made of a hook 44a of a mechanical fastener is formed in the vicinity of the tip of a cloth base material 48. On the other hand, the front body 2 is formed with a fastening region 12 formed of a loop 44b of a mechanical fastener, and is configured so that the hook 44a of the fastening tape 10 can be fixed. With such a configuration, the back body 6 of the diaper can be fixed to the front body 2, and the diaper can be worn by the wearer.

[1-6] Solid gather:
The three-dimensional gather is a member for preventing side leakage of the urine excreted by the wearer, and is a leak-proof wall configured to stand up three-dimensionally. By forming such a three-dimensional gather, the three-dimensional gather becomes a leakage barrier, and leakage from a leg-diameter opening or the like (so-called “lateral leakage”) can be effectively prevented.

  The structure of a three-dimensional gather can employ | adopt the structure used for the conventional disposable diaper and other absorbent articles. For example, an elastic member (a three-dimensional gathered elastic member) disposed on a part of the water-repellent sheet material, and a sheet member having a gather (rib) formed by the three-dimensional gathered elastic member can be suitably used.

  The three-dimensional gather may be formed of a sheet material that is completely different from the top sheet and the back sheet, but may be formed by folding back a top sheet such as a center sheet or a side sheet. For example, the tape-type diaper 1 shown in FIG. 1 is an example in which the three-dimensional gather 26 (26a, 26b) is formed by folding back the side sheet 18b. However, the three-dimensional gather may be formed by folding back a member other than the top sheet such as a second sheet.

  In order to prevent leakage from the crotch part, this three-dimensional gather may be formed at least in the crotch part, but may be formed in the front body or the back body. For example, the tape-type diaper 1 shown in FIG. 1 has a pair of three-dimensional gathers 26 (26a, 26b) formed continuously from the crotch part 4 to both the front body 2 and the back body 6 along the longitudinal direction of the diaper. An example is shown. Further, at least one pair of solid gathers must be formed, but two or more pairs may be formed.

  The three-dimensional gathers are bonded and fixed to the top sheet side at the longitudinal ends of the absorbent article (see FIG. 3B). The three-dimensional gather can be formed as an inward gather that tilts toward the inside of the diaper. Moreover, it can also be set as the three-dimensional gathers (C fold gather, Z fold gather, etc.) which formed the bending part and the folding | turning part in a part of height direction. For example, the tape-type diaper 1 shown in FIG. 1 is an example in which the three-dimensional gather 26 (26a, 26b) is inwardly gathered. And it arrange | positions so that each one solid gathering elastic member 36 (36a, 36b) may be inserted | pinched.

[1-7] Various elastic members:
In a tape type diaper, it is preferable to arrange an elastic member around the leg and an elastic member around the waist.

  The leg-hole elastic member is an elastic member arranged along the leg-hole opening. By arranging the elastic members around the legs, it is possible to form a gather (leg gather) rich in stretchability at the openings around the legs. Therefore, it is difficult to form a gap around the leg, and urine leakage from the opening around the leg can be effectively prevented. Further, when the leg elastic member is disposed, the leg elastic member contracts on both sides of the absorbent body when changing the diaper, so that the vicinity of the crotch portion is deformed into a bowl shape and a concave portion is formed. For this reason, urine and body fluid accumulate in the concave portion, and the diaper can be easily replaced without spilling urine and body fluid.

  For example, the tape-type diaper 1 shown in FIG. 1 is an example in which leg gathers are formed by linearly arranging two leg-around elastic members 40 along the longitudinal direction of the diaper. The leg-around elastic member 40 is made of rubber thread. However, the leg-hole elastic members are not necessarily arranged linearly, and may be arranged in a curve along the curve of the leg-diameter opening, for example.

  As for the leg elastic member, it is preferable that the leg elastic member 40 is formed in the part outside the standing line 46 of the three-dimensional gather 26 like the tape-type diaper 1 shown in FIG. With such a configuration, it is possible to improve the wearing feeling and wearing feeling of the crotch part while ensuring a sufficient leakage preventing effect of the three-dimensional gather.

  The tape-type diaper 1 shown in FIG. 1 shows an example in which the shape, arrangement position, number of arrangements, etc. of the leg-around elastic member 40 are bilaterally symmetric, but those that are bilaterally asymmetric are also included in the scope of the present invention. It is. In the tape-type diaper 1 shown in FIG. 1, an example in which two leg elastic members 40 are arranged on one side is shown, but only one or three or more may be arranged. Good. In addition, when using a plurality of elastic members around the legs, the thickness, extension rate, etc. may be set as appropriate according to the purpose, and it is not necessary to use the same members.

  A waist circumference elastic member is an elastic member arrange | positioned along a waist circumference opening part. By arranging the elastic member around the waist, a gather (waist gather) rich in stretchability can be formed in the waist opening. This waist gather makes it difficult for gaps to be formed around the waist, preventing urine leakage from around the waist, and improving the fit of the diaper to the wearer, thereby preventing the diaper from falling down.

  In addition, the tape-type diaper 1 shown in FIG. 1 is the example which has arrange | positioned the belt-shaped waist circumference elastic member 42 along the edge of the back body 6 of a diaper. The belt-like elastic member 42 around the waist is made of a stretchable foam such as urethane foam. In the illustrated example, the waist elastic member 42 is disposed only on the back body (back side), but the waist elastic member may be disposed on the front body (abdominal side).

  About these elastic members, after considering the degree of gather contraction and the like, the constituent material, the elongation rate of the material, the stretched state at the time of fixing, etc. may be determined.

  As an elastic member, the elastic member used with the conventional disposable diaper can be used suitably. Specific examples include elastic rubber, elastic film, elastic foam (urethane foam, etc.), etc., as well as thread rubber and flat rubber made of elastic materials such as natural rubber and synthetic rubber (urethane rubber, etc.). .

  The elastic member is preferably fixed in an extended state in order to exert a sufficient stretching force. For example, when the elastic member is natural rubber or synthetic rubber, it is preferably fixed in an extended state of 120 to 400%, and more preferably fixed in an extended state of 200 to 300%. By fixing in the extended state in such a range, a sufficient stretching force can be applied.

  The elastic member as described above is fixed to other constituent members of the diaper by an adhesive or other means. The fixing method may be, for example, adhesion using a hot melt adhesive or other highly fluid adhesive, or may be welding by heat such as heat sealing or ultrasonic waves.

[2] Tape diaper manufacturing method:
Hereinafter, the manufacturing method of the tape type diaper of this invention is demonstrated in the example in the case of manufacturing the tape type diaper 1 shown in FIG. First, the absorbent body 22 and the leg elastic member 40 wrapped in a hydrophilic sheet are placed on the surface of a long sheet material (back sheet material) which is a material of the back sheet 20, and the top sheet is further placed on the surface. By placing a long sheet material (top sheet material) that is a material of 18, a laminated body (diaper continuous body) that is an intermediate body of the diaper is obtained. At this time, as the top sheet material, two types of a top sheet material corresponding to the center sheet 18a and a top sheet material corresponding to the side sheet 18b are used. A three-dimensional gather 26 is formed by providing a folded portion on the sheet material corresponding to the side sheet 18b.

  Further, the back pocket 50 is attached to the upper side (outside pasting) or the lower side (inner pasting) of the three-dimensional gather 26, and an interconnecting region is formed in the overlapping region of the three-dimensional gather 26 and the back side pocket 50. In addition, the back side pocket 50 may be before the long sheet material (top sheet material) used as the material of the top sheet 18, but may be after it. In the case of the lower side (inner attachment) of the three-dimensional gather 26, it is necessary to be before placement. On the other hand, in the case of the upper side (outside pasting) of the three-dimensional gather 26, it may be before or after placing, but the sheet is stable as a laminated body (diaper continuous body) that becomes an intermediate body of the diaper after placing. In addition, there is an advantage that the separation position of the continuum is not easily displaced.

  In the diaper continuous body obtained as described above, a portion corresponding to the opening around the leg of the diaper is cut out in an arc shape and cut (R cut) to form an opening around the leg. Finally, the fastening tape 10 is attached, and the continuous diaper is cut into individual diapers, whereby the tape-type diaper 1 is manufactured.

  In addition to the method described above, a fastening tape is previously attached to the top sheet material, and on the surface of the back sheet material, an absorbent body and a leg-around elastic member wrapped in a hydrophilic sheet are placed, Furthermore, you may obtain a diaper continuous body by mounting the top sheet material in which the fastening tape was attached to the surface. The series of steps as described above can be continuously performed by mechanical means. For example, by adopting a method / apparatus such as continuously feeding a long sheet material from a roller, continuous production of a tape-type diaper becomes possible, which contributes to improvement of productivity.

  INDUSTRIAL APPLICABILITY The present invention can be suitably used as a diaper for an adult such as an elderly person or a disabled person who needs care or as a diaper for an infant.

It is a partially cutaway sectional view showing one embodiment of a tape type diaper as an absorptive article of the present invention, and is a figure showing the state where the tape type diaper of the present invention was developed and it was seen from the top sheet side. It is an enlarged view of the back side pocket of the tape type diaper as an absorbent article of the present invention. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG. It is a principal part expanded sectional view of a back side pocket. It is a partially cutaway sectional view showing Embodiment 2 of a tape type diaper as an absorbent article of the present invention, and is a view showing a state where the tape type diaper of the present invention is developed and viewed from the top sheet side. It is sectional drawing which shows Embodiment 3 of the tape-type diaper as an absorbent article of this invention, It is a figure which expand | deploys the tape-type diaper of this invention, and shows the state seen from the top sheet side. It is a partially cutaway sectional view showing Embodiment 4 of a tape type diaper as an absorbent article of the present invention, and is a view showing a state where the tape type diaper of the present invention is developed and viewed from the top sheet side.

Explanation of symbols

1: Tape type diaper, 2: Front body, 4: Crotch, 6: Rear body, 6a, 6b: Side edges, 8: Side flaps, 10: Fastening tape, 18: Top sheet, 18a: Center sheet, 18b : Side sheet, 20: Back sheet, 22: Absorber, 26, 26a, 26b: Solid gather, 26j: Free end (of solid gather), 36, 36a, 36b: Solid gather elastic member, 40: Elastic member, 42: Elastic member around the waist, 44: Fastener, 44a: Hook material, 44b: Loop material, 46, 46a, 46b: Standing wire, 50: Back pocket, 50j: Free end (of the back pocket), 50w: Standing wall portion, 51: pocket elastic member, 52: joint portion.

Claims (4)

An absorber, a top sheet that is arranged so as to cover the surface of the absorber, and at least partly made of a liquid permeable material, and a back sheet that is arranged so as to cover the back surface of the absorber. And a back sheet
In the absorbent article composed of each part of the ventral side, crotch and back side,
At least a pair of three-dimensional gathers are formed along both sides of the absorbent article,
The three-dimensional gather has one or more elastic members arranged at its free end,
At least on the back side of the absorbent article, a back side pocket is formed that opens toward the surface side center of the absorbent article along the back side end.
One or more elastic members are arranged at the free end of the back pocket,
At least one of the elastic member at the free end of the three-dimensional gather and the elastic member at the free end of the dorsal pocket is not arranged or is not stretched in the overlapping region of the three-dimensional gather and the dorsal pocket Absorbent articles arranged in.   2. The absorbent article according to claim 1, wherein in the region where the three-dimensional gather and the back pocket overlap, an interjoining region is formed in which the three-dimensional gather and the standing wall portion of the back side pocket are bonded to each other.   The absorptive article according to claim 2 in which said mutual junction field was formed on a longitudinal direction extension line of an arrangement position or arrangement position of at least a part of said elastic member arranged in said solid gathers.   In the overlapping region of the three-dimensional gather and the back pocket, the free end portion of the back pocket and the free end portion of the three-dimensional gather are formed as non-bonded regions that are non-bonded over 2 to 20 mm. The absorptive article according to any one of claims 1 to 3.

Images