JP6256147B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper that is attached to a wearer's crotch and absorbs and holds a liquid such as urine. More specifically, the disposable diaper of the present invention includes an absorbent main body and an exterior body for holding the absorbent body, and when the wearer leans forward, the back body of the exterior body is the wearer's body. It is configured to follow the back.

  Conventionally, a disposable diaper for absorbing and holding a liquid such as urine excreted by a wearer is known (for example, Patent Document 1). Disposable diapers are typically known as pants and tapes. For example, in a pants-type disposable diaper, an opening is formed around the waist and each leg by joining a front body and a back body on both sides. And a wearer can put on a pants-type disposable diaper by putting both legs into the opening part around the trunk, and taking out both legs from the opening part around each leg part. For example, a tape-type disposable diaper is provided with fastening tapes at both ends of the back body. The wearer can wear the tape-type disposable diaper by turning the fastening tape attached to the back body from the back side of the wearer to the abdomen side and attaching it to the front body.

  However, when a general disposable diaper is worn by a person with a back of the back (the back of the stamen), the waist part of the wearer cannot be properly covered, or a gap is formed between the diaper and the waist part. The urine and other excretory fluids sometimes leaked from the wearer's back. Moreover, when a person with a circular back wears a general disposable diaper, the diaper tends to slip down because the back side does not fit properly. In addition, even when the wearer is not circular, when the wearer leans forward, such as when getting up from a bed or sitting in a chair for a long time, a gap is likely to form between the diaper and the waist. It was. For example, if the wearer wears a tape-type disposable diaper in the supine position (posture position) and then takes a sitting position during a meal, the back side of the diaper cannot follow the body movement. In addition, a gap is formed between the diaper and the wearer's back, causing leakage. In addition, if the wearer wakes up repeatedly while wearing a diaper, or if the sitting posture continues for a long time, the diaper and the wearer's back are greatly displaced, and the feeling of wearing the diaper decreases.

  As a technique for solving such a general disposable diaper problem, for example, techniques disclosed in Patent Document 2 and Patent Document 3 are known.

  For example, in the disposable diaper of Patent Document 2, an extended region that protrudes upward from the waist edge is formed in the body. The disposable diaper of Patent Document 2 forms an extended region in the back of the body, preventing the upper part of the buttocks from protruding easily at the dorsal side regardless of the posture and body shape of the wearer, and the occurrence of urine leakage Can be suppressed.

  In addition, the disposable diaper of Patent Document 3 has one or more tacks formed on the back of the diaper so that even when the wearer leans forward, the tack is developed in accordance with the elongation of the wearer's back. It is configured. Thereby, the disposable diaper of patent document 3 is supposed to be able to follow the back body even when the wearer is in a forward leaning posture without deteriorating the wearability and the body holding property. .

JP 2011-015821 A JP 2012-192115 A JP 2012-239555 A

  As in Patent Document 2 and Patent Document 3 described above, by forming a stretched region and a tack on the back of the disposable diaper, when the wearer is a circular wearer or when the wearer is leaning forward Even so, the back of the diaper can be fitted to the wearer's back. However, if a stretched area or tuck is formed on the back of the disposable diaper, the back of the diaper may become dull if the wearer wears a diaper or the back of the wearer is straight. It becomes. If it does so, it will become difficult to wear a disposable diaper, and there will be a problem that a feeling of wear falls because a back body turns up during wearing. In particular, when a plurality of disposable diapers are deployed in a nursing care facility where there are users in various states, it is necessary to use different disposable diapers according to the state of the users.

  In addition, as in Patent Document 2 and Patent Document 3 described above, if a stretched region or tack is formed on the back of a disposable diaper, the structure of the disposable diaper becomes complicated and difficult to manufacture, and the raw material costs are high. Therefore, there is a problem that the manufacturing cost increases.

  Therefore, at present, there is a demand for a disposable diaper that is easy to fit on the back portion of the wearer even when the wearer is in a circular or forward tilted posture, does not impair the feeling of wear, and is easy to manufacture.

Therefore, the inventors of the present invention have made extensive studies on the conventional means for solving the problem, and as a result, formed a slit extending in the width direction in at least a part of the back body of the disposable diaper, and disposed a waist elastic member above the slit. I found a structure to do. In other words, even if the wearer is in a circular back or leaning forward, the back of the diaper follows the wearer's back by opening a slit in the back, so that a gap can be prevented from forming in the back. . Moreover, since it is only necessary to form a slit in the back body, the wearing feeling of the disposable diaper is not impaired, and the manufacture is not difficult. The inventor has conceived that the problems of the prior art can be solved based on the above knowledge, and has completed the present invention.
More specifically, the present invention has the following configuration.

The present invention relates to a disposable diaper.
The disposable diaper of the present invention is divided in the longitudinal direction into a front body 1 in contact with the wearer's abdomen, a back body 2 in contact with the back of the wearer, and a crotch 3 positioned therebetween.
The disposable diaper of the present invention includes an absorbent main body 30 extending in the longitudinal direction and an exterior body 40. The exterior body 40 is a member that covers at least the front body 1 side and the back body 2 side of the absorbent main body 30 from the skin non-facing surface side. The exterior body 40 may further cover the crotch part of the absorbent main body 30.
The exterior body 40 has at least one slit 41 and one or more waist elastic members 42. The slit 41 is formed in the back body 2 of the exterior body 40 and is a cut extending along the width direction of the disposable diaper. Further, the waist elastic member 42 is an elastic elastic member disposed at a position closer to the waist edge 2 a of the back body 2 than the slit 41. The waist elastic member 42 is fixed to the exterior body 40 so as to expand and contract along the width direction.

  As described above, the slit 41 is formed in the back body 2 of the exterior body 40, and the waist elastic member 42 is disposed on the side of the waist edge 2a from the slit 41, so that the wearer of the disposable diaper has a circular back and back. Even in the forward tilt posture, the rear body 2 of the exterior body 40 follows. That is, when the wearer leans forward, the wearer's back stretches and bends. At this time, the slit 41 opens in accordance with the stretch of the wearer's back and is disposed above the slit 41. The waist elastic | stretch member 42 which continues is closely_contact | adhered to a wearer's back part. For this reason, even when the wearer leans forward, it is possible to prevent a large gap from being generated between the wearer's back and the back body 2 of the exterior body 40. As a result, it is possible to prevent excrement such as urine from leaking from the back body 2 side of the disposable diaper. Furthermore, since the fit is improved simply by forming the slit 41 in the back body 2, the disposable diaper can be easily manufactured without impairing the wearing feeling.

  In the disposable diaper of the present invention, the slit 41 is preferably formed in a region where the absorbent main body 30 and the exterior body 40 overlap.

  As described above, when the wearer takes the forward leaning posture, the slit 41 formed in the exterior body 40 opens and an opening is formed. At this time, there is a concern that the wearer's skin may be exposed through this opening to give anxiety to the wearer, or excrement may leak and stain clothes and the like. Therefore, by forming the slit 41 in the region where the exterior body 40 and the absorbent main body 30 overlap as in the above configuration, the opening can be covered by the absorbent main body 30 when the slit 41 is opened. Therefore, even when the slit 41 is opened, it is possible to effectively prevent the skin of the wearer from being exposed and excrement from leaking from the opening. This improves the sense of security when wearing disposable diapers.

  In the disposable diaper of the present invention, it is preferable that the exterior body 40 has the joint portion 50 with the absorbent main body 30 in the region on the crotch 3 side and the front body 1 side rather than the position where the slit 41 is formed.

  As described above, by forming the slit 41 in the region where the exterior body 40 and the absorbent main body 30 overlap, the opening generated when the slit 41 is opened can be covered by the absorbent main body 30. However, in this case, if the exterior body 40 and the absorbent main body 30 are joined in the vicinity of the slit 41, the slit 41 cannot be opened and the slit 41 is opened and closed when the wearer is in a forward leaning posture. There is a concern that it will interfere. Therefore, as in the above configuration, the opening and closing of the slit 41 is not hindered by joining the absorbent main body 30 and the exterior body 40 in the region closer to the crotch 3 than the slit 41. Accordingly, the tracking effect of the exterior body 40 can be maximized by opening and closing the slit 41 freely.

  In the present invention, the absorbent main body 30 may have one or a plurality of three-dimensional gather elastic members 31 fixed in an extended state along the longitudinal direction. In this case, it is preferable that the three-dimensional gather stretchable member 31 has stretchability in the range of the crotch 3 side from the slit 41.

  As described above, it is possible to prevent the opening and closing of the slit 41 from being hindered by joining the absorbent main body 30 and the exterior body 40 in the region closer to the crotch 3 than the slit 41. However, in this case, if the three-dimensional gather elastic member 31 provided in the absorbent main body 30 has elasticity to a position exceeding the slit 41, the three-dimensional gather elastic member 31 contracts the absorbent main body 30. There is concern about the situation where the end of the back body 2 is rolled up. Therefore, as described above, the stretchability of the three-dimensional gather stretchable member 31 is kept within the range on the crotch 3 side with respect to the slit 41, thereby preventing the end of the absorbent main body 30 from rolling up. . Further, from this point of view, the three-dimensional gather elastic member 31 provided in the absorbent main body 30 is given elasticity in the range where the absorbent main body 30 and the exterior body 40 are joined (joined portion 50). It is particularly preferable that

  In the disposable diaper of the present invention, two or more slits 41 may be formed in the exterior body 40. For example, the slit 41 may include a first slit 41a and a second slit 41b located closer to the waist edge 2a of the back body 2 than the first slit 41a. In this case, the second slit 41b is preferably formed longer in the width direction than the first slit 41a.

  Like the said structure, the length of the width direction of the 2nd slit 41 located in the waist edge 2a side is made longer than the 1st slit 41a, By the back body 2 of the exterior body 40 with respect to a wearer's back part Followability is further improved. Therefore, according to the said structure, the wearing feeling of a disposable diaper can further be improved.

  Since the disposable diaper of the present invention fits to the back portion even when the wearer is in a circular back or forward leaning posture, the sense of security during wearing can be enhanced. Moreover, since the disposable diaper of this invention does not require an additional material especially, it can be said that manufacture is easy.

FIG. 1 is an external perspective view showing an example of a disposable diaper, and shows a state viewed from the back body side. FIG. 2 is a development view showing an example of a disposable diaper, and shows a state viewed from the skin facing surface side. FIG. 3 is a developed view showing an example of a disposable diaper, and shows a state as seen from the non-skin facing surface side. FIG. 4 is an enlarged view showing the rear body side of the disposable diaper in an enlarged manner. FIG. 5 is a schematic diagram conceptually showing a state when the disposable diaper is worn. FIG. 6 is a development view showing another example of the disposable diaper, and shows a state viewed from the non-skin facing surface side.

  Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. The present invention is not limited to the embodiments described below, but includes those appropriately modified by those skilled in the art from the following embodiments.

In the present specification, the “longitudinal direction” is a direction connecting the front body and the back of the disposable diaper. Further, the “width direction” is a direction perpendicular to the longitudinal direction of the disposable diaper. In the drawing, the “longitudinal direction” is indicated by the Y axis, and the “width direction” is indicated by the X axis.
In the present specification, “skin facing surface” means a surface facing the wearer's skin when worn, and “skin non-facing surface” means a surface not facing the wearer's skin when worn. Means.
In the present specification, “A to B” means “A or more and B or less”.

  If this invention is a disposable diaper, it is widely applicable to a well-known thing. For example, the present invention can be applied to a pants-type disposable diaper and a tape-type disposable diaper. The pants-type disposable diaper is a type of disposable diaper in which an opening is formed around the waist and each leg by joining the front and back bodies at both sides. The tape-type disposable diaper is a type of disposable diaper in which fastening tapes are provided at both ends of the back body.

  In particular, the present invention can be suitably applied to a pants-type disposable diaper. The pants-type disposable diaper may be of a cross-linked type having a configuration in which an absorbent main body is cross-linked between a front body exterior body and a back body exterior body formed as separate bodies. In the case of a cross-linked diaper, there is a gap between the front body exterior body and the back body exterior body, and the exterior body is not provided at the crotch portion of the absorbent main body. A pants-type disposable diaper is an integrated type in which an absorbent main body is fixed around a crotch part on an exterior body that is integrally formed by passing from the front part through the crotch part to the back part. Also good. Below, the content of this invention is demonstrated concretely, taking the example of the integral type in which the exterior body was integrally formed from the front body to the back body among these underpants type disposable diapers.

  FIG. 1 is a perspective view showing an example of a pants-type disposable diaper 100 according to an embodiment as viewed from the back body side. Moreover, FIG.2 and FIG.3 is an expanded view which shows the example of the disposable diaper 100. FIG. FIG. 2 shows a state in which the disposable diaper 100 is viewed from the skin facing surface side, and FIG. 3 shows a state in which the disposable diaper 100 is viewed from the skin non-facing surface side. 2 and 3, the disposable diaper 100 has a longitudinal direction (Y-axis direction) and a width direction (X-axis direction). When the disposable diaper 100 is worn, the front body 1 in contact with the wearer's abdomen, the back body 2 in contact with the wearer's back, and the crotch 3 applied to the wearer's crotch are arranged in the longitudinal direction. It is divided. In the present embodiment, the disposable diaper 100 includes an exterior body 40 that is integrally formed from the front body 1 through the crotch 3 to the back body 2. And the absorptive main body 30 is arrange | positioned on the skin opposing surface side of the exterior body 40 so that it may extend to the front body 1 and the back body 2 centering on the crotch 3.

  From the unfolded state shown in FIG. 2, the left and right side portions 4 of the front body 1 and the back body 2 are joined in a state of being overlapped with each other. As a result, side seal portions are formed at the left and right ends of the front body 1 and the back body 2. In this manner, the front body 1 and the back body 2 are joined to each other at the left and right side portions 4 so that the unfolded state shown in FIG. 2 is assembled into the state shown in FIG. As shown in FIG. 1, a waist opening 5 is formed by the upper edge of the front body 1 and the upper edge of the rear body 2. In addition, by joining the both side portions 4 of the front body 1 and the back body 2 together, a pair of leg openings 6 positioned around the left and right legs of the wearer when worn are formed. For this reason, the wearer can put on the disposable diaper 100 by putting both legs from the waist opening 5 and taking out each leg from the leg opening 6.

  In the present invention, as the configuration of the absorbent main body 30, a known configuration can be adopted as appropriate. The absorbent main body 30 is basically composed of an absorbent material between a liquid-permeable top sheet located on the skin facing surface side and a liquid-impermeable back sheet located on the skin non-facing surface side. The structure in which the absorbent body is enclosed. For example, examples of the liquid-permeable material constituting the top sheet are a woven fabric, a non-woven fabric, or a porous film. Further, for example, a fiber made of a thermoplastic resin such as polypropylene, polyethylene, polyester, or nylon, which has been subjected to a hydrophilization treatment and further made into a non-woven fabric may be used. An example of the liquid-impermeable material constituting the back sheet is a liquid-impermeable film made of polyethylene resin. In particular, it is preferable to use a microporous polyethylene film in which a plurality of fine pores of 0.1 to 4 μm are formed. Moreover, as an absorptive material which comprises an absorber, a fluff pulp, a super absorbent polymer, or a hydrophilic sheet can be used, for example. In addition, as the absorbent material, one type of fluff pulp, superabsorbent polymer, or hydrophilic sheet may be used alone, or two or more types may be used in combination.

  1-3, it is preferable that the absorptive main body 30 is a shape in which the width | variety by the side of the back body 2 was widely formed at least. For example, the absorbent main body 30 may be an hourglass shape as shown in FIGS. The hourglass shape means a shape in which both the front body 1 side and the back body 2 side of the absorbent main body 30 are formed wide and the crotch part 3 is formed narrow. Moreover, although illustration is abbreviate | omitted, the absorptive main body 30 may be the T-shaped shape by which only the width | variety of the back body 2 side was formed wide. As will be described later, a slit 41 is formed in the exterior body 40 in a region where the exterior body 40 and the absorbent main body 30 overlap in the back body 2 of the disposable diaper. For this reason, the length in the width direction of the slit 41 can be secured long by making the absorbent main body 30 the above-mentioned hourglass shape or T-shape.

  As shown in FIG. 2, the absorbent main body 30 may be formed with a three-dimensional gather. The three-dimensional gather is a member that rises along both side edges of the absorbent main body 30 and prevents side leakage of urine excreted by the wearer. The pair of three-dimensional gathers includes one or a plurality of three-dimensional gather elastic members 31 and side sheets 32, respectively. The side sheets 32 are sheet members arranged along the longitudinal direction on both the left and right sides of the absorbent main body 30. The side sheet 32 has both ends in the longitudinal direction fixed to the absorbent main body 30, and a non-fixed free part is formed at the center in the longitudinal direction. A three-dimensional gather expansion / contraction member 31 is fixed to the distal end portion of the free portion of the side seat 32 in an extended state along the longitudinal direction. For this reason, when the three-dimensional gather expansion / contraction member 31 contracts, the free part of the side seat 32 rises in a direction in which the wearer's skin comes into contact. As a result, the pair of three-dimensional gathers becomes a urine leakage barrier, and urine that has not permeated through the top sheet or urine that has not been absorbed by the absorber leaks from the openings around the legs of the disposable diaper. Prevent leakage. The three-dimensional gather can employ a known configuration used in conventional disposable diapers. For example, the side sheet 32 is preferably a sheet member having hydrophobicity and air permeability. As the side sheet 32, for example, a non-woven sheet obtained by a method such as card embossing or spunbonding can be used, and it is particularly preferable to use a non-woven sheet such as SMS or SMMS having high waterproofness.

  The exterior body 40 has an inner sheet 40a positioned on the skin facing surface side (surface side facing the wearer's skin) and an outer sheet 40b positioned on the skin non-facing surface side (surface side not facing the wearer's skin). And have. The inner sheet 40a and the outer sheet 40b are overlapped with each other and joined by a hot melt adhesive or the like. Each of the inner sheet 40a and the outer sheet 40b is preferably composed of a non-woven fabric having a good touch.

  Here, in the disposable diaper 100 of the present invention, as shown in FIGS. 1 to 3, one or a plurality of slits 41 are formed in the back body 2 of the exterior body 40. The slit 41 is a cut extending along the width direction (Y direction) of the disposable diaper. In the illustrated example, the slit 41 is formed in a straight line extending in parallel with the width direction, but the shape of the slit 41 is not limited to this. The slit 41 only needs to extend along the width direction, and may be a diagonal line shape, a V shape, an arc shape, a wavy line shape, a zigzag line shape, or other linear shapes. Further, the slit 41 may have an opening shape in which a part of the exterior body 40 is cut out. By forming the slit 41 in the exterior body 40, the slit 41 is opened when the exterior body 40 is pulled in the longitudinal direction. An opening is formed in a portion where the slit 41 is opened.

  As shown in FIGS. 1 to 3, in the present invention, the slit 41 is preferably formed at a position where the exterior body 40 and the absorbent main body 30 overlap. In particular, when the absorbent main body 30 has a shape in which the back body 2 side is wide, the slit 41 is formed in a region where the widened portion of the absorbent main body 30 and the exterior body 40 overlap. preferable. Thus, by providing the slit 41 at the position where the absorbent main body 30 and the exterior body 40 overlap, even if the slit 41 is opened and an opening is formed, it is possible to prevent the skin of the wearer from being exposed through the opening. .

  Moreover, FIG. 3 has shown typically the junction part 50 to which the absorptive main body 30 and the exterior body 40 are joined. As shown in FIG. 3, the absorbent main body 30 and the exterior body 40 are joined at the joint 50 from the front body 1 through the crotch part 3 to the back body 2. However, as shown in FIG. 3, it is preferable that the joint portion 50 is formed only on the crotch 3 and the front body 1 side than the position where the slit 41 is formed. That is, if the joint portion 50 is formed at a position closer to the waist edge 2a of the back body 2 than the slit 41, the slit 41 may not be opened even if the exterior body 40 is pulled in the longitudinal direction. For this reason, in order not to obstruct the opening and closing of the slit 41, it is preferable that the joint portion 50 between the absorbent main body 30 and the exterior body 40 is formed only on the crotch 3 side than the slit 41.

  As shown in FIGS. 1 to 3, a plurality of elastic elastic members 42 and 43 are arranged on the front body 1 and the back body 2 of the exterior body 40, respectively. The plurality of elastic elastic members 42 and 43 are basically fixed to the front body 1 and the back body 2 of the exterior body 40 in a state of extending along the width direction (X-axis direction) of the disposable diaper. Specifically, the plurality of elastic elastic members 42 and 43 are sandwiched and fixed between the inner sheet 40a and the outer sheet 40b constituting the exterior body 40. Each of the plurality of elastic elastic members 42 and 43 extends in the width direction (X direction), and is arranged at a predetermined interval in the longitudinal direction (Y direction). For this reason, when the plurality of elastic elastic members 42 and 43 contract, wrinkles are generated in the sheet members (nonwoven fabric or the like) constituting the front body 1 and the back body 2 to form a gather. In this way, by forming a gather on the front body 1 and the back body 2 of the disposable diaper, the wearer can flexibly fit around the abdomen.

  Specifically, the plurality of elastic elastic members fixed to the exterior body 40 include a waist elastic member 42. The waist elastic member 42 is a member disposed in the vicinity of the waist edge 1 a of the front body 1 and in the vicinity of the waist edge 2 a of the back body 2. In the present invention, the waist elastic member 42 arranged in the back body 2 means an elastic elastic member arranged at a position closer to the waist edge 2 a than the slit 41. In particular, the waist elastic member 42 is preferably a member disposed over substantially the entire area of the back body 2 of the exterior body 40. That is, it is preferable that the waist elastic member 42 is a member continuously arranged so as to connect the left and right side portions 4 of the back body 2. Furthermore, it is preferable that the waist elastic member 42 is disposed at a position that does not overlap the absorbent main body 30. That is, it is preferable that the waist elastic member 42 is disposed at a position closer to the waist edge 2 a than the longitudinal edge of the absorbent main body 30. For example, the number of waist elastic members 42 may be one or more, preferably two or more, and particularly preferably about 2 to 8, or about 3 to 6.

  Thus, by arranging the waist elastic member 42 at a position closer to the waist edge 2a than the slit 41, the vicinity of the waist edge 2a of the exterior body 40 fits the back portion of the wearer. Then, when the wearer takes a forward leaning posture, the exterior body 40 is pulled in the longitudinal direction in conjunction with the operation, and the slit 41 is opened. As a result, the back body 2 of the exterior body 40 follows while fitting to the wearer's back.

  The plurality of elastic elastic members fixed to the exterior body 40 may include a tammy elastic member 43. The Tammy stretchable member 43 is a member disposed at a position closer to the crotch 3 than the waist stretchable member 42. In the present embodiment, the Tammy stretchable member 43 is disposed at a position overlapping the absorbent main body 30. For this reason, as shown in FIG. 3, the Tammy stretchable member 43 is cut so as not to exhibit stretchability in a region overlapping the absorbent main body 30. That is, the Tammy stretchable member 43 is disposed on both the left and right sides of the absorbent main body 30. If the absorptive main body 30 and the Tammy stretchable member 43 overlap, the absorptive main body 30 bends when the Tammy stretchable member 43 contracts. In order to prevent this, the Tammy stretchable member 43 is disposed so as to be located on both the left and right sides of the absorbent main body 30. For example, the number of Tammy elastic members 43 is preferably 2 or more, and particularly preferably about 3 to 20, or about 4 to 15.

  Furthermore, the exterior body 40 may include a plurality of leg elastic members 44 that form gathers around the legs. The leg elastic members 44 are fixed along the periphery of the leg opening 6 of the disposable diaper 100. ing. As the leg elastic member 44 contracts, wrinkles are generated at the periphery of the leg opening 6 to form a gather.

  As various elastic elastic members fixed to the exterior body 40, known members having elasticity can be used. For example, as the elastic elastic member, thread-like or flat elastic rubber can be used. As such a rubber material, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicone, and polyester can be used. In addition, as the elastic stretchable member, a stretchable member such as a sheet-like stretchable film, a mesh-like stretchable member, or a stretchable nonwoven fabric can be appropriately employed.

  As shown in the development view of FIG. 2, the three-dimensional gather elastic member 31 attached to the absorbent main body 30 preferably has elasticity in a range on the crotch 3 side with respect to the slit 41. In other words, it is preferable that the three-dimensional gather stretchable member 31 does not exhibit stretchability in a range closer to the waist edge 2 a than the slit 41. For example, the three-dimensional gather elastic member 31 may not be disposed on the waist edge 2a side of the slit 41. Further, for example, even when the three-dimensional gather elastic member 31 is disposed on the waist edge 2 a side with respect to the slit 41, the three-dimensional gather elastic member 31 is located in the waist edge 2 a side with respect to the slit 41. It may be in a relaxed state where it does not contract. For example, if the three-dimensional gather elastic member 31 provided in the absorbent main body 30 is elastic to the position beyond the slit 41, the rear body 2 side of the absorbent main body 30 due to the contracting action of the three-dimensional gather elastic member 31. There is concern about the situation where the end of the sword is rolled up. Therefore, as described above, by keeping the stretchability of the three-dimensional gather stretchable member 31 within the range of the crotch 3 side with respect to the slit 41, it is possible to prevent the end of the absorbent main body 30 from rolling up. it can. Further, from this point of view, the three-dimensional gather elastic member 31 provided in the absorbent main body 30 is given elasticity in the range where the absorbent main body 30 and the exterior body 40 are joined (joined portion 50). It is particularly preferable that

  Next, the shape of the slit 41 formed in the exterior body 40 will be described in more detail with reference to FIG. FIG. 4 shows an enlarged view of the back body 2 of the disposable diaper. In FIG. 4, the symbol a indicates the length of the slit 41 in the width direction (X direction). Moreover, the code | symbol b has shown the maximum length of the opening produced when the slit 41 is pulled to the waist edge 2a side of the back body 2. FIG. The maximum length of the opening is the length in the longitudinal direction (Y direction) of the opening that is generated when the exterior body 40 is pulled as much as possible without breaking. Reference symbol c indicates the distance from the slit 41 to the longitudinal edge of the absorbent main body 30.

Here, it is preferable that the values of the length a of the slit 41, the maximum length b of the opening, and the distance c satisfy the relationship represented by the following formula (1).
Formula (1) ... a / 2 <= b <= c

  As described above, when the value of b is a / 2 or more, when the exterior body 40 is pulled in the longitudinal direction, the back body 2 of the exterior body 40 effectively follows the back part of the wearer. To come. In particular, the value of b is preferably equal to a / 2 (a / 2 = b).

  Further, as described above, since the value of c is equal to or greater than b, the opening generated by the slit 41 can be covered by the absorbent main body 30 even when the slit 41 is maximally opened. In particular, the value of c is preferably larger than b (b <c).

  Moreover, FIG. 5 has shown typically the state which the wearer is wearing the disposable diaper 100 which concerns on this invention. As shown in FIG. 5, when the wearer has a circular back or when the wearer leans forward, the waist elastic member 42 disposed in the vicinity of the waist edge 2 a of the back body 2 of the exterior body 40. However, it follows the wearer's back while fitting. At this time, the exterior body 40 is pulled in the longitudinal direction by the waist elastic member 42 following the back portion of the wearer. Then, the slit 41 formed in the outer body 40 at a position closer to the crotch 3 than the waist elastic member 42 opens. Further, the slit 41 is formed in a region where the exterior body 40 and the absorbent main body 30 overlap. For this reason, even if the slit 41 is opened and an opening is formed, the absorbent main body 30 is located in the opening. Therefore, the wearer's skin is not exposed from the opening of the slit 41. As described above, the disposable diaper 100 according to the present invention is less likely to cause a gap on the back body 2 side even when the wearer has a circular back or when the wearer leans forward.

  FIG. 6 is a developed view showing another embodiment of the present invention. FIG. 6 shows a state in which the disposable diaper 100 is viewed from the skin non-facing surface side, as in FIG. 3. In the embodiment shown in FIG. 6, unlike the above-described embodiment, a plurality of slits 41 are formed in the back body 2 of the exterior body 40. As described above, the exterior body 40 may be formed with a plurality of slits 41.

  Specifically, in the present embodiment, a first slit 41a, a second slit 41b, and a third slit 41c are formed in the back body 2 of the exterior body 40. These slits are provided at positions closer to the crotch 3 in order from the first slit 41a. That is, the first slit 41a is formed at a position closest to the crotch part 3, the third slit 41c is formed at a position closest to the waist edge 2a, and the second slit 41b is formed between the first slit 41a and the third slit 41c. It is formed between.

  In such a configuration, it is preferable that the slit in the width direction (X direction) of each slit is short in the slit located near the crotch 3 and long in the slit located near the waist edge 2a. Specifically, the first slit 41a is the shortest, the second slit 41b is the second shortest, and the third slit 41c is the longest in the width direction. Thus, by adjusting the length of the slit, the slit is easily opened when the exterior body 40 is pulled in the longitudinal direction. For this reason, the wearing feeling of a disposable diaper improves.

  Further, when a plurality of slits are formed, it is preferable that the distance between the slits in the longitudinal direction (Y direction) is closer to the waist edge 2a. Specifically, the interval between the second slit 41b and the third slit 41c is shorter than the interval between the first slit 41a and the second slit 41b. In this way, by adjusting the interval between the slits, the slits can be easily opened when the exterior body 40 is pulled in the longitudinal direction. Therefore, even in this case, the wearing feeling of the disposable diaper is improved.

  As mentioned above, in this specification, in order to express the content of this invention, embodiment of this invention was described, referring drawings. However, the present invention is not limited to the above-described embodiments, but includes modifications and improvements obvious to those skilled in the art based on the matters described in the present specification.

  The present invention relates to a disposable diaper for infants and the elderly. Therefore, this invention can be utilized suitably in the manufacturing industry of a disposable diaper.

DESCRIPTION OF SYMBOLS 1 ... Front body 1a ... Waist edge 2 ... Back body 2a ... Waist edge 3 ... Crotch part 4 ... Left and right both sides 5 ... Waist opening 6 ... Leg opening 30 ... Absorbent main body 31 ... Three-dimensional gather expansion-contraction member 32 ... Side sheet 40 ... exterior body 40a ... inner sheet 40b ... outer sheet 41 ... slit 41a ... first slit 41b ... second slit 41c ... third slit 42 ... waist elastic member 43 ... tammy elastic member 44 ... leg elastic member 50 ... joint Part 100 ... disposable diapers

Claims (3)

A front body (1) in contact with the wearer's abdomen, a back body (2) in contact with the wearer's back, and a crotch portion (3) positioned between the front body (1) and the back body (2) And is divided in the longitudinal direction,
An absorbent body (30) extending in the longitudinal direction;
A disposable diaper comprising an outer body (40) covering at least the front body (1) side and the back body (2) side of the absorbent main body (30) from the skin non-opposing surface side,
The exterior body (40)
At least one slit (41) formed along the width direction of the disposable diaper in the back body (2);
Than said slit (41), have a, with one or more waist elastic member (42) disposed at the position of the waist end edge (2a) toward said back body (2),
The slit (41) is formed in a region where the absorbent main body (30) and the exterior body (40) overlap,
The exterior body (40) is connected to the absorbent main body (30) only in the region of the crotch (3) side and the front body (1) side from the position where the slit (41) is formed. A disposable diaper having a joint (50) . The absorbent main body (30) has one or more three-dimensional gather elastic members (31) fixed in an elongated state along the longitudinal direction,
In a state where the absorbent main body (30) is joined to the exterior body (40), the three-dimensional gather expansion / contraction member (31) expands / contracts only in the range on the crotch (3) side from the slit (41). Have sex
The disposable diaper according to claim 1 . A front body (1) in contact with the wearer's abdomen, a back body (2) in contact with the wearer's back, and a crotch portion (3) positioned between the front body (1) and the back body (2) And is divided in the longitudinal direction,
An absorbent body (30) extending in the longitudinal direction;
A disposable diaper comprising an outer body (40) covering at least the front body (1) side and the back body (2) side of the absorbent main body (30) from the skin non-opposing surface side,
The exterior body (40)
At least one slit (41) formed along the width direction of the disposable diaper in the back body (2);
One or a plurality of waist elastic members (42) arranged at positions closer to the waist edge (2a) of the back body (2) than the slit (41),
The slit (41) is at least
A first slit (41a);
A second slit (41b) located closer to the waist edge (2a) of the back body (2) than the first slit (41a),
The second slit (41b) is formed longer in the width direction than the first slit (41a).
Disposable diapers .

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