JP4996900B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper. In particular, the present invention relates to a disposable diaper in which a male genital can be easily taken out.

  Conventionally, there are disposable diapers, training pants, incontinence pants, and the like as absorbent articles used by the elderly and disabled. All of these absorbent articles are properly used in accordance with the wearer's lifestyle and care level. For example, a disposable diaper can be used as an auxiliary tool for excretion, etc. by holding and absorbing the excrement without leaking it to people who are difficult to excrete by themselves, such as the elderly and disabled persons, or It is used as a hygiene product for nursing care.

  Here, disposable diapers are not only people who have difficulty in urinating on their own, but also those who can urinate on their own, such as people with disabilities such as mild incontinence and elderly people who can walk. May also be used. However, people with disabilities who have mild incontinence, elderly people who can walk, etc. are reluctant to wear diapers due to the impression that diapers are generally used by people who have difficulty urinating on their own. Often had. This is because the conventional diaper does not have an idea that an opening is provided in the diaper itself from the viewpoint of leakage prevention, and a urination outlet for taking out the male genitalia during urination as provided in general male underwear It was also because it did not have. Thus, when the wearer urinates, for example, an operation different from a general urination operation such as entering a private room and taking off a diaper is required. Such an action is a particularly troublesome action especially for male wearers, and gives more resistance to wearing a diaper.

  On the other hand, an absorbent article that enables a male genital to be taken out even when a paper diaper is worn is disclosed (for example, see Patent Document 1).

The absorbent article described in Patent Literature 1 includes an inner surface sheet, an outer surface sheet, and an intermediate sheet provided therebetween, and is positioned on the back side and the abdominal side portion positioned on the abdomen side of the wearer when worn. A paper diaper main body divided into a back side portion and a crotch portion therebetween, and an absorbent body attached to the crotch portion of the paper diaper main body. The inner and outer sheets of the ventral side are provided with perforations for forming an opening through which the male genitals can be removed when worn, and the opening of the inner and outer sheets is removed by removing the fastening material and shifting the intermediate sheet The parts communicate with each other so that a through-hole can be formed in the ventral part. As a result, the male genital can be taken out even when the disposable diaper is worn.
JP 2005-80996 A

  However, the paper diaper disclosed in Patent Document 1 has an opening for taking out the genitals on the inner surface and the outer sheet of the ventral side portion, but this opening has a configuration of only an opening, so the opening is not provided. There was a problem that it was difficult to spread. In addition, this disposable diaper requires various operations to remove the male genitalia from the opening when the wearer urinates. For example, when removing the male genitalia, it is necessary to remove the fixing member of the intermediate sheet in order to shift the intermediate sheet. Such an action makes it difficult for a wearer who can use only one hand due to paralysis or the like to urinate on his own. Furthermore, when the intermediate sheet is removed from the fastening member, there is a risk of generating a specific sound. Thereby, there is a possibility that it may be noticed that a disposable diaper is worn around when urinating, and the resistance to using the disposable diaper is increased.

  This invention is made | formed in view of the above subjects, and it aims at providing the disposable diaper which can take out a male genitalia easily at the time of urination.

  In order to achieve the above object, the present inventor provides an opening for urination formed by overlapping a plurality of sheet members on the front body of a disposable diaper, and can expand and contract a predetermined part of the disposable diaper. As a result, it was found that urination was facilitated and the present invention was completed. Specifically, it aims at providing the following disposable diapers.

  (1) A chassis body having at least a front body and a back body at the time of wearing, a liquid-permeable surface sheet disposed on at least a part of the chassis body, and one side in the thickness direction of the surface sheet A disposable diaper comprising: a liquid-impermeable back sheet disposed on the liquid sheet; and a liquid-retaining absorbent disposed between the top sheet and the back sheet. A chassis and a second chassis, and the front body of the chassis body is provided with an overlapping portion formed by overlapping at least a part of the first and second chassis; The overlapping portion extends in the longitudinal direction of the disposable diaper, and the first and second portions are spaced apart from each other across a substantially center line that bisects the width direction. Disposable diaper having a joint portion for joining the Yashi, and a non-bonded portion provided between the joint portion.

  (2) The disposable diaper includes a trunk opening, a pair of leg openings, by joining or locking the front body and the back body of the chassis main body in a predetermined position in advance or when attached. The disposable diaper according to (1), wherein the chassis main body in the pant shape is formed so that at least a part thereof can be expanded or contracted or extended.

  (3) The chassis main body in the pant shape has a substantially center in the back body of the trunk opening and the vicinity of the crotch part on the crotch direction side of the non-joint part around the trunk of the chassis in the pant shape. The disposable diaper according to (2), further comprising an opening stretchable region formed by connecting along, wherein the opening stretchable region is formed such that at least a part thereof can be stretched or stretched.

  (4) The disposable diaper according to (3), wherein an expansion ratio at the time of expansion in the opening expansion / contraction region is in a range of 1.1 to 4.0 times.

  (5) When the length of the trunk circumference at the time of non-stretching of the opening stretchable region is 100%, the tensile stress when stretched until the length of the trunk stretch of the openable stretchable region becomes 150%, The disposable diaper according to (3), which is 20N or less.

(6) The chassis body in a pant shape includes an elastic boundary region formed in all or part of the vicinity of a boundary portion including a joining or locking position between the front body and the back body,
The disposable diaper according to (2), wherein the elastic boundary region is formed so that at least a part thereof can be expanded or contracted or extended.

  (7) The disposable diaper according to any one of (1) to (6), wherein a reinforcing member having high rigidity is disposed at least at a part of the joint.

  (8) The disposable diaper according to any one of (1) to (7), wherein a guide sign that suggests the presence of the non-joining portion is provided in the vicinity of the non-joining portion.

  (9) The disposable diaper according to (8), wherein the guide sign suggests the presence of the non-joined portion by giving a color.

  (10) The disposable diaper according to (8), wherein the guide sign suggests the presence of the non-joined portion by unevenness.

  (11) The disposable diaper according to any one of (1) to (10), wherein an opening assisting tool is provided on the crotch part side of the non-joined part.

  ADVANTAGE OF THE INVENTION According to this invention, the disposable diaper which can take out a male genitalia easily at the time of urination can be provided.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In addition, embodiment of this invention is not limited to the following embodiment at all, and the technical scope of this invention is not limited to this. For example, in the present embodiment, a disposable diaper for adults will be described. However, the present invention is not limited to this, and a disposable diaper for child toilet training may be used.

  Moreover, in the following embodiment, let the side orient | assigned to a wearer's body among disposable diapers be the skin contact surface side, and let the opposite side to the skin contact surface side be a non-skin contact surface side.

  FIG. 1 is an exploded perspective view of a disposable diaper according to an embodiment of the present invention in an expanded state. FIG. 2A is a perspective view of the disposable diaper according to the embodiment. FIG. 2B is a cross-sectional view taken along the line XX in FIG. FIG. 3A is a perspective view showing a wearing state of a pants-type disposable diaper. FIG. 3B is a perspective view showing a state where the unfolded disposable diaper is attached. FIG. 4A is a development view showing the arrangement of the elastic members of the disposable diaper according to the embodiment. FIG. 4B is a front view of the disposable diaper of FIG. FIG. 5A is a front view showing the arrangement position of the overlapping opening. FIG. 5B is a development view showing the arrangement position of the overlapping opening. 6A and 6B are cross-sectional views showing the joined state of the first and second chassis. FIG. 7A is a perspective view showing an opening / contraction region of the disposable diaper according to the first embodiment. FIG. 7B is a diagram showing a state in which the overlapping opening is widened by extending the opening stretchable region. FIG. 8A is a perspective view showing an elastic back body region of the disposable diaper according to the first embodiment. FIG. 8B is a diagram showing a state in which the overlapping opening is widened by extending the elastic back body region. FIG. 9A is a perspective view showing an elastic boundary region of the disposable diaper according to the first embodiment. FIG. 9B is a diagram illustrating a state in which the overlapping opening is widened by extending the elastic boundary region.

  FIG. 10 is a perspective view showing a wearing state of the disposable diaper according to the first embodiment. FIG. 11: is a perspective view which shows the state which extended the overlap opening part of the disposable diaper which concerns on 1st Embodiment. FIG. 12 is a perspective view showing a wearing state of the disposable diaper according to the second embodiment. FIG. 13: is a perspective view which shows the state which extended the overlap opening part of the disposable diaper which concerns on 2nd Embodiment.

[1] First Embodiment [1.1] Overall Configuration A disposable diaper according to the present invention will be described using a pants-type disposable diaper 1 according to an embodiment of the present invention. As shown in FIGS. 1 and 2, the disposable diaper 1 forms an outer shape of the disposable diaper 1, and includes a chassis main body 13 that forms the front body 2, the back body 3, and the crotch portion 4 when worn, and the chassis main body 13. Provided on the skin contact surface side, provided on the non-skin contact surface side of the chassis main body 13 that is one side of the surface sheet 11 and the liquid-permeable surface sheet 11 that is formed in a substantially vertically long shape constituting the surface layer. The liquid impervious back sheet 14 formed in a substantially vertically long shape constituting the back surface layer, and the liquid retaining property formed between the top sheet 11 and the chassis body 13 and formed in a substantially vertically long shape constituting the absorbing layer. And the absorber 12.

  The chassis body 13 includes a first chassis 13A that constitutes a part of the front body 2, the back body 3 and the crotch portion 4, a second chassis 13B that constitutes a part of the front body 2 and is formed substantially vertically long, Is provided. The first chassis 13A and the second chassis 13B are formed by overlapping a part of the first and second chassis 13A and 13B in the front body 2 at the time of mounting, and in a pair of joint portions 21 and 21 provided in this overlap allowance. It is joined. Specifically, the second chassis 13B overlaps with the longitudinal direction end on the side corresponding to the front body 2 when the first chassis 13A is mounted so that one side in the longitudinal direction of the second chassis 13B overlaps the width direction of the end. 13B is arranged. In this overlap margin, joints 21 and 21 are provided at positions spaced apart from each other across a substantially center line C1 that extends in the longitudinal direction of the disposable diaper 1 and bisects the width direction. 1 and 2nd chassis 13A and 13B are joined. Between each joining part 21, the non-joining part 22 is provided and the overlapping opening part 5 is formed by providing this non-joining part 22. FIG. For example, when the wearer pulls the first chassis 13 </ b> A of the overlapping opening portion 5, which is the non-joining portion 22, toward the crotch direction, the opening expands in the crotch direction, and the wearer has a predetermined size in the disposable diaper 1. Can be obtained.

  The top sheet 11 and the absorbent body 12 are arranged from the front body 2 of the first chassis 13A to the back body 3 via the crotch portion 4 on the skin contact surface side of the first chassis 13A. Further, the back sheet 14 is disposed from the front body 2 of the first chassis 13A to the back body 3 through the crotch portion 4 on the non-skin contact surface side of the first chassis 13A. Thereby, for example, excrement such as urine excreted from the excretion part of the wearer passes through the liquid permeation region in the top sheet 11 and is absorbed by the absorber 12, but is disposed on the non-skin contact surface side. Since the back sheet 14 is liquid-impermeable, excrement such as urine does not permeate the non-skin contact surface side and is held in the state of being absorbed by the absorbent body 12, and leakage to the outside is prevented. Is prevented.

  Here, you may arrange | position the absorber 12 in the state wrapped in the tissue (not shown) and the hydrophilic nonwoven fabric (not shown). For example, when wrapped in a hydrophilic non-woven fabric, a configuration in which the topsheet 11 is not used or a configuration in which the topsheet 11 is used only partially can be employed. Thereby, for example, it is possible to reduce the production cost. Moreover, you may use the back surface sheet 14 which joined the nonwoven fabric etc. to the non-skin contact surface side of the back surface sheet 14. By bonding a non-woven fabric or the like to the non-skin contact surface side of the back sheet 14, the touch at the time of wearing of the wearer is improved, and when a film is used for the back sheet 14, the non-woven fabric is bonded to the film This is because, for example, generation of unpleasant sound caused by film rubbing can be prevented.

  The absorbent body 12 formed substantially vertically long includes, for example, a substantially rectangular one having a longitudinal direction and a short side direction, and a width direction in which a part of a side extending in the longitudinal direction extends in the longitudinal direction. It may be recessed toward the center line C1, or a part of the side extending in the longitudinal direction may be raised in a direction opposite to the width direction center line C1 extending in the longitudinal direction. That is, the absorbent body 12 formed substantially vertically long has a part of both side edges in the longitudinal direction recessed toward the width direction center line C1 extending in the length direction, or the width direction center line C1 extending in the length direction. It may be raised in the opposite direction. In other words, the absorbent body 12 may have a length in the width direction that is different from a part of the longitudinal direction of the absorbent body 12. Moreover, the absorber 12 may be arrange | positioned so that it may become vertically long in the width direction of the disposable diaper 1, and may be arrange | positioned so that it may become vertically long in the longitudinal direction of the disposable diaper 1. FIG.

  The front body 2 and the back body 3 include, for example, those that are distinguished by a substantially center line C2 that extends in the width direction of the disposable diaper 1 and bisects the longitudinal direction.

  The disposable diaper 1 formed in the underpants type in FIG. 2 (A) and (B) is shown. As shown in FIGS. 2A and 2B, the disposable diaper 1 according to this embodiment includes a front body in side seal portions 8 and 8 which are joints in the front body 2 and the back body 3 of the chassis body 13. 2 and the back body 3 are joined together by an ultrasonic seal or the like to form a pants shape. A disposable diaper 1 formed in a pants shape includes a front body 2 that is disposed on the abdomen side of the wearer when worn, a back body 3 that is disposed on the back side of the wearer when worn, and a crotch portion of the wearer Crotch portion 4 disposed in the vicinity. Moreover, the disposable diaper 1 is formed in a pants shape, so that a torso opening 9 located around the wearer's torso in a worn state and a pair of leg openings 7, 7 located on each of the wearer's legs. And comprising. In addition, as another joining method in the side seal parts 8 and 8, joining by a heat seal, a hot-melt adhesive agent, etc. can be illustrated, for example.

  The length in the crotch direction of the disposable diaper 1 in a state before wearing formed in a pants shape (the maximum length in the crotch direction from the crotch portion 4 to the trunk opening 9) is, for example, in the range of 350 mm to 450 mm Can be illustrated. Moreover, as a maximum length between each side seal part 8 and 8 in the expansion | deployment state of the direction (henceforth width direction) orthogonal to the crotch direction of the disposable diaper 1, the range of 425 mm to 900 mm can be illustrated, for example. The unfolded state refers to a state where the front body 2 and the back body 3 are not joined as shown in FIG. Moreover, the maximum length is a length obtained by stretching the disposable diaper 1 in a state of being shrunk by an elastic force such as a thread-like elastic member described later or a stretchable base sheet in the width direction and the crotch or crotch direction. including.

  In the case of using the disposable diaper 1 for children, for example, the length in the crotch direction of the disposable diaper 1 for children in a state before wearing formed in a pants shape can range from 200 mm to 300 mm. Moreover, as a maximum length between each side seal part 8 and 8 in the expansion | deployment state of the width direction of the disposable diaper 1 for children, the range of 300 mm to 450 mm can be illustrated, for example.

  In the present embodiment, as shown in FIG. 3A, the front body 2 and the back body 3 are joined at predetermined side seal portions 8 and 8 to join the trunk opening 9 and the pair of leg openings. Although the disposable diaper 1 formed in the underpants type which has 7 and 7 is demonstrated, in this invention, it is not restricted to this. For example, as shown to FIG. 3 (B), you may use for the unfoldable disposable diaper 1A which can be worn by latching the front body 2 and the back body 3 with the latching member 8A. Further, for example, a hook-and-loop fastener that can be re-locked as used in the unfolded disposable diaper 1A at the predetermined side seal portions 8 and 8 of the front body 2 and the back body 3 of the disposable diaper formed in a pants shape. By providing a locking member such as a pants-type disposable diaper, it is possible to easily unlock the diaper and to deploy and re-lock the pant-type disposable diaper. Also good.

  Moreover, in this embodiment, although the back surface sheet 14 has been arrange | positioned at the non-skin contact surface side of the chassis main body 13, in this invention, it is not restricted to this. For example, the back sheet 14 may be disposed between the absorber 12 and the chassis body 13. Moreover, when the chassis main body 13 is formed by laminating a plurality of sheet members, the back sheet 14 may be disposed between the respective sheet members.

  Furthermore, in this invention, the leak-proof wall formed using an elastic member and a leak-proof sheet, what is called a three-dimensional gather (not shown) is arrange | positioned along the both ends of the width direction of the absorber 12 of the disposable diaper 1. Also good. For example, the disposable diaper 1 according to the present invention is provided with a leak-proof sheet as a three-dimensional gather so as to extend in the width direction of the absorber 12 from between the absorber 12 and the chassis body 13 or the back sheet 14, At least one or more elastic members can be disposed at the widthwise end of the leak-proof sheet and can be fixed with a hot melt adhesive or the like. The leak-proof sheet may remain in the state of extending in the width direction of the absorbent body 12, and the folded portion is folded in the center direction in the width direction of the absorbent body 12 so that the folded portion is the skin contact surface of the absorbent body 12. It may be arranged on the side.

  In the case where the three-dimensional gather extends from the absorber 12 in the width direction of the absorber 12, the distance between the absorber 12 and the elastic member in the three-dimensional gather is approximately the central region in the longitudinal direction of the absorber 12. It is preferable that it exists in the range of 20 mm or more. Further, in the case where the three-dimensional gather is folded and arranged, the distance between the absorber 12 and the elastic member in the three-dimensional gather is 20 mm or more in a state where the three-dimensional gather leakage-proof sheet is widened in the substantially central region. It is preferable to be in the range.

  As shown in FIGS. 4 (A) and 4 (B), elastic bodies such as a stretchable nonwoven fabric and a stretchable film are disposed on the front body 2 and the back body 3 of the chassis main body 13 of the disposable diaper 1. Yes. Thereby, the disposable diaper 1 is provided with a stretching property or a stretching property. The disposable diaper 1 may be provided with stretchability or stretchability by disposing a thread-like elastic member on all or part of the front body 2 and the back body 3 of the chassis body 13, for example, It is good also as providing the extensibility or the elasticity by arrange | positioning an elastic sheet in the part of the back 2 and the back body 3. In this way, the disposable diaper 1 can be stretched or stretched by using, for example, the waistline that is the whole of the front body 2 and the back body 3 of the chassis body 13 or an elastic sheet or elastic member for a part of the waistline. Is provided.

  As a part having stretchability or stretchability by an elastic sheet or the like, for example, an approximately center in the back body 3 of the trunk opening 9 and the vicinity of the crotch part 4 on the crotch direction side of the overlapping opening 5 are pants. It is sufficient that at least a part of the opening stretchable region 55 formed by connecting the chassis body 13 along the circumference of the chassis main body 13 extends or stretches. For example, the overlapping opening portion that is a part of the opening stretchable region 55 5 inseam direction side may be sufficient. Further, for example, the elastic boundary region 57 including all or part of the vicinity of the boundary portion including the connection position or the locking position with the front body 2 and the back body 3 may be used. Furthermore, the elastic back body area | region 56 containing all or one part of the back body 3 vicinity which is a part of the trunk | drum opening part 9 may be sufficient. The disposable diaper 1 should just be provided with at least any one of the opening expansion-contraction area | region 55, the elastic boundary area | region 57, and the elastic back body area | region 56, and may be provided with what combined each.

  Here, the disposable diaper 1 opens when the length of the stretchable region 55 in the non-stretched state is 100% when the crotch portion 4 side of the overlapping opening 5 is pulled in the crotch direction with a tensile stress of 20 N. It is possible to use a material in which the length of the opening stretchable region 55 when stretched relative to the length of the stretchable region 55 when not stretched can be stretched from 110% to 400%. Preferably, what can be extended from 150% to 400% can be used. If the opening stretchable region can be extended to a length of 110% or more, the overlapping opening 5 can be used as a male genital outlet when the overlapping opening 5 is opened. This is because. Further, if the length of the opening stretchable region can be extended from 150% to 400%, the ease of use as a male genital outlet is improved.

  Further, as the elastic sheet used for the first and second chassis 13A and 13B in the chassis main body 13, for example, a sheet having an expansion / contraction ratio of 1.1 to 4.0 times when not extended is used. Can do. That is, the disposable diaper 1 is an elastic sheet having a maximum expansion ratio of 1.1 to 4.0 times, or first and second that can be expanded or contracted from a maximum expansion ratio of 1.1 to 4.0 times. Chassis 13A, 13B can be used.

  The disposable diaper 1 has a so-called waistline gather formed by disposing a thread-like elastic member 91 in order to make the body opening 9 elastic in the circumferential region of the body opening 9. The waistline gather makes it possible to favorably maintain the wearing position and wearing state of the pants-type disposable diaper 1 during wearing, for example. The disposable diaper 1 is formed by arranging a thread-like elastic member (not shown) in order to make the portions along the leg openings 7 and 7 elastic in the peripheral region of the leg openings 7 and 7. You may have what is called leg gathers. Leg gathers make it possible to prevent leakage, for example, by properly tightening around the legs when worn. Here, the elastic member 91 may be thread-like or belt-like. Further, as the elastic member 91, for example, an elastic sheet having elasticity such as a stretchable nonwoven fabric (nonwoven fabric formed from a mixed fiber of polyurethane and polypropylene) or a stretchable film can be used.

[1.2] Overlapping Opening The overlapping opening 5 extends, for example, in the longitudinal direction of the disposable diaper 1 and is separated from each other across a substantially center line C1 that bisects the width direction (hereinafter referred to as a substantially center line C1). It is provided between the joint parts 21 and 21 in the position. That is, the overlapping opening 5 is formed by the joint portions 21 and 21 of the first and second chassis 13A and 13B and the non-joint portion 22 provided between the joint portions 21 and 21.

  The maximum length in the longitudinal direction of the overlapping opening 5 in the deployed state of the disposable diaper 1 is, for example, 100 mm or more, and the length in a range within 60% of the maximum length in the width direction in the deployed state of the disposable diaper 1. Can be illustrated. Preferably, it is 120 mm or more, and a length within a range of 40% or less of the length in the width direction of the disposable diaper 1 can be exemplified. This is because the length of the overlapping opening 5 needs to be 100 mm or more in order to take out the male genitals of the wearer. Moreover, when the length of the overlapping opening 5 exceeds the range of 60% of the length of the disposable diaper 1 in the width direction, it is difficult to pull up the disposable diaper 1 when the disposable diaper 1 is worn, which is difficult to use. This is because it becomes.

  Moreover, as length of the overlap margin of the 1st and 2nd chassis 13A and 13B in the front body 2, the range of 15 mm or more can be illustrated, for example. Preferably, it can illustrate that it is 30 mm or more.

  As shown in FIG. 5A, the overlapping opening 5 is preferably in the waist area 23 in the front body 2. The waist circumference 23 includes the front body 2 and the back body 3 excluding the crotch portion 4 of the disposable diaper 1. Further, the overlapping opening 5 is formed at a position away from the outer edge of the absorbent body 12 in the front body 2. For example, even when the overlapping opening 5 is formed by overlapping the second chassis 13B with a part of the first chassis 13A in the width direction at a position separated from the outer edge on one side in the width direction of the absorber 12. Good. Further, for example, the overlapping opening 5 is formed by overlapping the second chassis 13B with a part of the first chassis 13A in the longitudinal direction at a position separated from the outer edge on one side in the longitudinal direction of the absorber 12. May be. Further, when a part of the absorber 12 is cut out, the overlapping opening 5 is, for example, a second chassis at a position spaced substantially parallel to the cut out part of the absorber 12. 13B and the first chassis 13A may be overlapped so as to be substantially parallel to the notched portion of the absorber 12, and the overlapping opening 5 may be formed.

  For example, as shown in FIG. 5B, the position of the overlapping opening 5 is a distance from the end of the trunk opening 9 to the upper end of the first chassis 13A, and from the upper end of the first chassis 13A. The distance from the end of the trunk opening 9 to the approximate center line C2 in the expanded state is b, where b is the distance to the approximate center line C2 that extends in the width direction in the expanded state and bisects the longitudinal direction (hereinafter referred to as the approximate center line C2) When the distance is c, the value corresponding to b / a is preferably 0.65 or more and 8.0 or less.

  Specifically, the overlapping opening 5 preferably has a distance a from the end of the trunk opening 9 to the upper end of the first chassis 13A in the range of 50 mm to 270 mm. In addition, the distance b from the upper end of the first chassis 13A to the substantially center line C2 in the unfolded state is preferably in the range of 180 mm to 400 mm. Further, it is preferable that the distance c from the end of the trunk opening 9 to the substantially center line C2 in the unfolded state is in the range of 350 mm to 450 mm.

  In addition, the overlapping opening 5 is preferably provided on the crotch direction side of the absorbent body 12. That is, the overlapping opening 5 is d, which is the distance from the outer edge in the longitudinal direction of the front body 2 of the absorber 12 to the substantially center line C2 in the unfolded state, from the upper end of the first chassis 13A to the front body 2 of the absorber 12. When the distance to the outer edge in the longitudinal direction is e, it is preferable that the value corresponding to b / d is in a range larger than 1.0 and smaller than 2.3. Specifically, the absorber 12 preferably has a distance d from the outer edge in the longitudinal direction of the front body 2 of the absorber 12 to the substantially center line C2 in the deployed state in the range of 175 mm to 395 mm. Moreover, it is preferable that the distance e from the upper end of the 1st chassis 13A to the outer edge of the longitudinal direction in the front body 2 of the absorber 12 exists in the range of 5 mm to 225 mm.

  As a disposable diaper for children used by children, which is smaller than the disposable diaper 1 according to this embodiment, for example, the overlapping opening 5 is a distance from the end of the trunk opening 9 to the upper end of the first chassis 13A. It is preferable that a is in the range of 35 mm to 180 mm. Further, the distance b from the upper end of the first chassis 13A to the substantially center line C2 in the unfolded state is preferably in the range of 120 mm to 265 mm. Moreover, it is preferable that the distance c from the end of the trunk opening 9 to the substantially center line C2 in the unfolded state is in the range of 200 mm to 300 mm.

  Similarly, in the disposable diaper 1 for children, the distance d from the outer edge in the longitudinal direction of the front body 2 of the absorbent body 12 to the substantially center line C2 in the unfolded state is preferably in the range of 115 mm to 260 mm. Moreover, it is preferable that the distance e from the upper end of the 1st chassis 13A to the outer edge of the longitudinal direction in the front body 2 of the absorber 12 exists in the range of 5 mm to 150 mm.

  In either one or both of the first chassis 13A and the second chassis 13B in the non-joining part 22 of the disposable diaper 1, a plurality of elastic members 63 formed in a thread shape are arranged in whole or in part. Thus, since the skin contact property with respect to a wearer's abdomen improves by arrange | positioning the thread-like elastic member 63 in the non-joining part 22, a wearer's skin is inadvertently exposed from the overlapping opening part 5. FIG. Can be prevented. For example, as shown in FIG. 6A, when the thread-like elastic member 63 is disposed in the overlapping opening 5 of the second chassis 13B, the non-joining portion 22 of the first chassis 13A is moved by the second chassis 13B. It becomes possible to hold down. Further, for example, as shown in FIG. 6B, in the case where the thread-like elastic member 63 of the overlapping opening 5 is arranged on the first chassis 13A, the non-joined portion of the second chassis 13B by the first chassis 13A. 22 can be pressed down. The elastic member 63 may be disposed on any of the first and second chassis 13A and 13B, but is preferably disposed on a sheet member corresponding to the non-skin contact surface side. Moreover, the elastic member 63 may use the elastic member formed in strip | belt shape, for example, may use an elastic nonwoven fabric and an elastic film.

  The overlapping opening 5 that is the non-joining portion 22 may join a part of the first and second chassis 13A and 13B in a weakly joined state that can be easily peeled off, for example. In addition, the overlapping opening 5 that is the non-joining portion 22 may be joined at a predetermined interval by, for example, a circle, an ellipse, or a polygon. That is, the overlapping opening 5 may be unbonded entirely in the non-bonded portion 22 or may be bonded by a bonding means that can be easily removed.

[1.3] Others [1.3.1] Reinforcing Sheets A pair of reinforcing sheets 53 and 53 that are reinforcing members are provided at both ends of the overlapping opening 5 of the disposable diaper 1. The pair of reinforcing sheets 53 and 53 are formed in a substantially rectangular shape, are disposed between the first chassis 13A and the second chassis 13B, and are joined to the first and second chassis 13A and 13B at the joint portion 21. The

  The reinforcing sheets 53 and 53 are made of, for example, a member such as a non-woven fabric or a film having a tear strength (measurement method: A-1 method (single tongue method) JIS L 1906) of 5 N or more in both the width direction and the longitudinal direction. Can be used. Examples of the size of the reinforcing sheets 53 and 53 include a size of 60 mm in the vertical direction (in the crotch direction) and 40 mm in the horizontal direction (in the width direction). The reinforcing sheets 53 and 53 are joined to the first chassis 13A and the second chassis 13B at both ends of the overlapping opening 5 by, for example, hot melt bonding, heat sealing, ultrasonic sealing, or the like. In addition, when the first and second chassis 13A and 13B, which are the chassis body 13, are formed by a plurality of sheet members or the like, the chassis body 13 is disposed between any of the first and second chassis 13A and 13B, and the seat The reinforcing sheets 53 and 53 may be joined or fixed from both sides of the member. In the present embodiment, the reinforcing sheets 53 and 53 are formed in a substantially rectangular shape, but the present invention is not limited to this. For example, various shapes such as a circle, an ellipse, and a polygon can be used.

[1.3.2] Holes Holes 52 and 52 are provided at both ends of the joints 21 and 21 in the overlap opening 5. Specifically, the hole portions 52 and 52 are corner portions on the crotch direction side in the joint portions 21 and 21 of the sheet member disposed on the skin contact surface side of the first chassis 13A or the second chassis 13B. Are provided respectively. The holes 52 and 52 are for tearing resistance to improve the strength. For example, when the wearer opens the overlapping opening 5, the tear stress applied to the joints 21 and 21 is dispersed. Is possible. Specifically, by providing the holes 52 and 52, the tear stress generated at the ends of the joints 21 of the first and second chassis 13A and 13B is not a point but the curved surfaces of the holes 52 and 52. As compared with the case where the hole portions 52, 52 are not provided, the tearing resistance can be improved and the strength can be improved. The holes 52 and 52 may be, for example, circular or may be elliptical or polygonal.

[1.3.3] Opening aid A disposable diaper 1 according to the present invention is, for example, a handle portion (not shown) which is an opening aid on the crotch portion 4 side or the trunk opening portion 9 side of the overlapping opening portion 5. May be provided. As the handle portion, for example, a string-like or belt-like base sheet or the like may be joined to the front body 2 of the first chassis 13A or the second chassis 13B, or a tongue-like protrusion may be provided. Thus, by providing the handle part which is an opening assistance tool, for example, the wearer can easily open the overlapping opening part 5 using the handle part. In addition, for example, even when worn by a person who needs care, the caregiver can easily open the overlapping opening portion 5 by pulling the handle portion, so that an assisting action such as urination of the patient is performed. Will also be easier.

[1.3.4] Guide sign The disposable diaper 1 according to the present invention may be provided with a guide sign (not shown) in the vicinity of the overlapping opening 5, for example. As a guide mark, for example, a color may be given to the crotch portion 4 side or the trunk opening 9 side of the overlapping opening 5 or the peripheral area of the overlapping opening 5. Thus, by giving a color, for example, it becomes possible to make the wearer easily recognize the position of the overlapping opening 5, so that urination can be facilitated.

  Further, the guide sign may be attached with a symbol such as an arrow or a character. Thus, by attaching symbols and characters such as arrows, for example, in the case where not only the wearer himself but also a caregiver assists the wearer's urination, the position and opening of the overlapping opening 5 It can be easily opened without making a mistake in the direction.

  Furthermore, as a guide sign, for example, the crotch part 4 side of the overlapping opening 5 or the trunk opening 9 side, or the peripheral area of the overlapping opening 5 is subjected to uneven processing by embossing or the like, or has unevenness. You may join a base material sheet. As described above, by performing uneven processing on the peripheral area or the like of the overlap opening 5, the wearer can confirm the position of the overlap opening 5 only by touching the peripheral area or the like of the overlap opening 5. Therefore, urination can be facilitated.

[1.4] Usage Mode Next, a usage mode of the disposable diaper 1 in the first embodiment of the present invention will be described.

  As shown in FIG. 10, the disposable diaper 1 in 1st Embodiment is formed in the underpants type, and a wearer is the disposable diaper which can wear and use similarly to normal pants. At the time of urination, the wearer inserts a finger or the like into the overlapping opening 5 that is the non-joining portion 22 of the first and second chassis 13A and 13B, and inserts the first chassis 13A in the overlapping opening 5 by, for example. The overlapping opening 5 is opened by pulling in the crotch direction. At this time, since the reinforcing sheets 53 and 53 are provided at both ends of the overlapping opening 5, it is possible to prevent an opening having a predetermined length or more.

  When the disposable diaper 1 is provided with, for example, a string-shaped opening aid (not shown) on the crotch direction side of the overlapping opening 5, the wearer holds the opening aid, The overlapping opening 5 may be opened by hooking it on a finger or the like and pulling the opening aid in the crotch direction. Also, color is imparted to the vicinity of the overlapping opening 5, for example, the second chassis 13B on the crotch direction side of the overlapping opening 5, or the first chassis 13A on the crotch direction side of the overlapping opening 5, Alternatively, when a guide sign (not shown) such as arranging a nonwoven fabric having unevenness is provided, the wearer can easily grasp the position of the overlapping opening 5.

  Next, the wearer further pulls a part of the opened overlapping opening 5 toward the crotch direction. As a result, as shown in FIG. 11, since the predetermined part of the chassis main body 13 extends in the direction in which the wearer pulls, the wearer secures an opening having a size for taking out the male genital through the overlapping opening 5. The male genitals can be easily removed. Here, as a part where the chassis main body 13 extends, for example, the whole chassis main body 13 may extend, and is an abbreviation of the rear body 3 of the trunk opening 9 as shown in FIG. All or part of the opening expansion / contraction region 55 that is a region connecting the central portion and the substantially central portion of the front body 2 of the overlapping opening 5 along the outer periphery of the pants shape may be extended. As described above, when the whole or a part of the opening expansion / contraction region 55 in the chassis body 13 is at least extended, for example, as shown in FIG. It is possible to secure an opening that extends toward the crotch portion 4 side, which is the pulling direction, so that the overlapping opening 5 can take out the male genitals.

  Further, as another stretchable part of the chassis main body 13 in which the overlapping opening 5 can form an opening of a size that allows the male genitals to be taken out, as shown in FIG. The elastic back body area | region 56 formed by using the elastic member which can be expanded-contracted for the back body 3 of 9 vicinity can be illustrated. In this way, by making at least the elastic back body region 56 of the chassis main body 13 extendable and retractable, for example, as shown in FIG. 8B, the opening formed by the overlapping opening 5 is pulled by the wearer. Thus, it is possible to secure an opening that allows the male genitals to be taken out.

  Further, as another stretchable part of the chassis main body 13 in which the overlapping opening 5 can form an opening having a size that allows the male genitals to be taken out, for example, as shown in FIG. An elastic boundary region 57 formed by using an elastic member that can be expanded and contracted is used for all or part of the vicinity of the boundary portion including the joining or locking position between the rear body 3 and the back body 3. In this way, by forming at least the elastic boundary region 57 in the chassis main body 13 so as to be stretchable, for example, as shown in FIG. 9B, the opening formed by the overlapping opening 5 pulls the wearer. Thus, it is possible to secure an opening that allows the male genitals to be taken out.

  The elastic back body region 56 and the elastic boundary region 57 may be stretchable by being used together with the above-described waistline gathers (not shown), and only the elastic back body region 56 or the elastic boundary region 57 may be stretched. It is good also as expansion-contraction by. Further, in the present embodiment, the leg gather described above is not provided, but a thread-like elastic member or a belt-like elastic member such as a stretchable nonwoven fabric or a stretchable film is attached to the leg opening 7 around the leg opening 7. You may arrange | position to the perimeter of this or a part thereof.

  Thus, the wearer can easily take out the male genitals even when the disposable diaper 1 is worn. For example, the wearer can take out the male genitals with one hand. Thereby, for example, the wearer can urinate without taking off the disposable diaper 1 during urination. Moreover, since the opening direction (direction where a wearer pulls) in the overlapping opening 5 is a direction toward the crotch part 4 and the overlapping opening 5 is substantially vertically long extending in the width direction of the disposable diaper 1. For example, regardless of whether the person is a right-handed person or a left-handed person, the overlapping opening 5 can be easily opened on the crotch part 4 side.

  Furthermore, for example, since the first chassis 13A or the second chassis 13B having elasticity is arranged on the skin contact surface side or the non-skin contact surface side of the overlapping opening 5, it is normal and after urination The first chassis 13A or the second chassis 13B can come into contact with the wearer's abdomen, and the wearer's skin and male genitals can be prevented from being unnecessarily exposed. Moreover, it becomes possible to improve a feeling of wear with the elastic member provided in 1st and 2nd chassis 13A, 13B. Here, when a sheet member (not shown) having elasticity is bonded to either the skin contact surface side or the non-skin contact surface side of the overlapping opening 5, the wearer normally or after urination The abdomen and the sheet member can come into contact with each other, and the skin and male genitals can be prevented from being unnecessarily exposed. In addition, for example, the wearing feeling can be improved by an elastic member provided on the sheet member.

[2] Second Embodiment A disposable diaper 1B according to a second embodiment of the present invention will be described with reference to FIGS. In the second embodiment, parts that are not particularly described are the same as those in the first embodiment, and the same reference numerals are given to the numbers given in the drawings if they are the same as those in the first embodiment.

  As shown in FIG.12 and FIG.13, the disposable diaper 1B concerning 2nd Embodiment differs from 1st Embodiment in the expansion-contraction area | region of the chassis main body 13 formed of 1st and 2nd chassis 13A, 13B. Specifically, the disposable diaper 1 </ b> B according to the second embodiment differs from the first embodiment in providing an elastic boundary region 57 as an expansion / contraction region of the chassis body 13.

  The disposable diaper 1B according to the second embodiment is a thread-like elastic member in the vicinity of the boundary including the joining or locking position of the front body 2 and the back body 3, or a belt-like elastic member such as a stretchable nonwoven fabric or stretch film. The elastic boundary region 57 is formed by arranging. Thereby, as for the disposable diaper 1, in the front body 2 including the crotch direction side and the crotch direction side of the overlapping opening 5B, the tensile stress in the part is smaller than the tensile stress in the other part. In other words, the elastic boundary region 57 has a larger tensile stress than the crotch direction side and the crotch direction side of the overlapping opening 5B, and the elastic boundary region expands and contracts when the wearer pulls the opening of the overlapping opening 5B. It becomes possible. In the leg openings 7 and 7, leg gathers formed by disposing a thread-like elastic member or a belt-like elastic member such as a stretchable nonwoven fabric or stretchable film are disposed on the entire circumference or a part thereof. May or may not be arranged. Similarly, also in the trunk opening 9, so-called waistline gathers may be arranged on the entire circumference or a part thereof, or may not be arranged.

  As described above, the disposable diaper 1B according to the second embodiment makes the tensile stress on the crotch direction side and the crotch direction side of the overlapping opening 5 smaller than the tensile stress in other portions. For example, it is set as the structure which does not arrange | position an expansion-contraction member in the crotch direction side and crotch direction side of the overlapping opening part 5, or arrange | positions an expansion / contraction member with a small expansion / contraction amount. As a result, in the disposable diaper 1B, the vicinity of the overlapping opening 5 is not formed with a shrinkage (gather) in the width direction by an elastic member or the like, or the shrinkage (gather) is less than other parts. It becomes possible to keep the length of the opening 5 close to the maximum length. Furthermore, since at least a part of the elastic boundary region 57 is expanded by the elastic force, the overlapping opening 5 can be easily expanded in the crotch direction, and an opening of a predetermined size can be secured.

[3] Each component Each component of the disposable diaper 1 is demonstrated below.

[3.1] Surface Sheet The surface sheet 11 is disposed on the body side and in contact with the excretory part during use. The entire surface of the surface sheet 11 may be liquid permeable, or a part thereof may be liquid permeable. Moreover, it may be comprised by the sheet-like member of 1 sheet, and may be comprised by laminating | stacking several sheet | seat members.

As the top sheet 11, for example, a material that has a strength that does not break even when a load due to compression, twisting, friction, or the like is applied during wearing, and that does not irritate the skin is preferable. For example, a sheet material having liquid permeability can be used. Examples of the non-woven fabric include those obtained by subjecting a hydrophobic fiber such as polyolefin or polyester to a hydrophilic treatment formed by a production method such as point bond, air through, or spun bond. Moreover, as a material of a nonwoven fabric, the material obtained from the range of 15 g / m < ² > to 35 g / m < ² > which has a fabric weight mainly including a natural fiber and a chemical fiber can be illustrated, for example. Examples of natural fibers include cellulose such as cotton. Examples of chemical fibers include semi-synthetic cellulose such as rayon, regenerated cellulose, acetate, and triacetate, thermoplastic hydrophobic chemical fibers, and thermoplastic hydrophobic chemical fibers that have been subjected to hydrophilic treatment. Examples of thermoplastic hydrophobic chemical fibers include single fibers such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET), fibers formed by graft polymerization of polyethylene (PE) and polypropylene (PP), and core sheaths. Examples include composite fibers such as structures.

  Examples of the porous plastic sheet include a porous sheet made of a thermoplastic resin such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET), and a porous foam material.

[3.2] Absorber The absorber 12 absorbs and holds discharged body fluid such as urine. Examples of the absorbent body 12 include a structure in which a superabsorbent polymer and a hydrophilic fiber are mixed and laminated, or a structure in which a superabsorbent polymer is fixed to a hydrophilic sheet with a hot melt adhesive or the like. May be. Examples of the superabsorbent polymer include polyacrylate-based and starch / acrylate-based absorptive polymers having a water absorption capacity of 20 g / g or more and a particle size of 100 μm to 800 μm. The thing which occupies 80% or more can be illustrated. Examples of hydrophilic fibers include pulverized pulp fibers and rayon fibers. Examples of the hydrophilic sheet include non-woven fabrics such as point bonds, air-throughs and spun bonds (weight per unit area: 15 g / m ² to 35 g / m ² ) formed by subjecting hydrophobic fibers such as polyolefins and polyesters to hydrophilic treatment. It can be illustrated. Examples of hot melt adhesives include SBS (styrene-butadiene-styrene copolymer), SIS (styrene-isobutylene-styrene copolymer), SEBS (styrene-ethylene-butylene-styrene copolymer), and SEPS (styrene-ethylene). -Propylene-styrene copolymer), APAO (Amorphous Poly Alpha Orefin) and the like as a base polymer can be exemplified.

[3.3] First and second chassis The first and second chassis 13 </ b> A and 13 </ b> B forming the chassis body 13 constitute the outer shape of the disposable diaper 1. The first and second chassis 13A, 13B may be configured by a single sheet member, or may be configured by laminating a plurality of sheet members. In the present embodiment, the disposable diaper 1 includes a first chassis 13A having a front body 2, a back body 3, and a crotch portion 4 positioned between the front body 2 and the back body 3, and the first chassis Although the top sheet 11, the absorber 12, and the back sheet 14 are disposed at a predetermined position of 13A, the present invention is not limited to this. For example, even if the first chassis 13A has the front body 2 and the back body 3, and the crotch part 4 having the top sheet 11, the absorber 12 and the back sheet 14 is independently joined to the first chassis 13A. Good. In this case, the back sheet 14 and the first chassis 13A in the crotch part 4 may be joined, or the back sheet 14 may have the role of the first chassis 13A.

The first and second chassis 13A, 13B are preferably made of a material that is breathable, has a strength that does not break even when a load due to compression, twisting, friction, or the like is applied during wearing, and does not irritate the skin. An air permeable sheet member such as a non-woven fabric or a perforated plastic sheet can be used. Examples of the nonwoven fabric include those obtained by forming synthetic fibers such as polyolefins and polyesters by point bonds, air throughs, spun bonds and the like. Examples of the material of the nonwoven fabric include materials obtained mainly from natural fibers and chemical fibers and having a basis weight in the range of 15 g / m ² to 35 g / m ² . Examples of natural fibers include cellulose such as cotton. Examples of chemical fibers include semi-synthetic cellulose such as rayon, regenerated cellulose, acetate, and triacetate, thermoplastic hydrophobic chemical fibers, and thermoplastic hydrophobic chemical fibers that have been subjected to hydrophilic treatment. Examples of thermoplastic hydrophobic chemical fibers include single fibers such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET), fibers formed by graft polymerization of polyethylene (PE) and polypropylene (PP), and core sheaths. Examples include composite fibers such as structures.

  Examples of the porous plastic sheet include a porous sheet made of a thermoplastic resin such as polyethylene (PE), polypropylene (PP), and polyethylene terephthalate (PET), and a porous foam material.

[3.4] Back Sheet As the back sheet 14, for example, a thermoplastic film mainly composed of polyethylene (PE), polypropylene (PP), a breathable resin film, a non-woven fabric such as spunbond or spunlace, and the like is breathable. A plurality of resin films bonded together, SMS (spunbond / meltblown / spunbond) multiple layers, and the like can be used. Preferably, for example, a resin film mainly composed of a polyolefin resin and having a basis weight in the range of 10 g / m ² to 30 g / m ² is preferable.

[3.5] Elastic Member As the elastic member 91, for example, natural rubber or synthetic rubber such as styrene-butadiene, butadiene, or isoprene can be used. The sheet-like elastic member is formed of, for example, a foamed polyurethane having a basis weight of 30 g / m ² to 80 g / m ² and a mixed fiber of polyurethane and polypropylene having a basis weight of 20 g / m ² to 70 g / m ^2. A nonwoven fabric or the like can be used.

[3.6] Adhesive The topsheet 11 and the absorbent body 12 and the chassis main body 13 are bonded together by being bonded with a hot melt adhesive. Moreover, the surface sheet 11 and the absorber 12 are joined so that it may be bonded together with a hot melt adhesive. The first and second chassis 13A and 13B are joined together by a hot melt adhesive. In addition, joining is not restricted to the said hot melt adhesion, For example, you may use a heat seal, an ultrasonic seal, etc. individually or in combination.

Examples of hot melt adhesives include SBS (styrene-butadiene-styrene copolymer), SIS (styrene-isobutylene-styrene copolymer), SEBS (styrene-ethylene-butylene-styrene copolymer), and SEPS (styrene-ethylene). -Propylene-styrene copolymer), APAO (Amorphous Poly Alpha Orefin) and the like as a base polymer can be exemplified. Examples of the coating pattern when bonded by hot melt bonding include spiral coating, control seam coating, coater coating, curtain coater coating, and summit gun coating. The basis weight of the adhesive in hot melt bonding is preferably 1 g / m ² to 30 g / m ² , and more preferably 3 g / m ² to 10 g / m ² . In the case of a pattern in which the adhesive is coated in a linear shape, the wire diameter is preferably 30 μm to 300 μm.

It is a perspective exploded view in the deployment state of the disposable diaper concerning the embodiment of the present invention. It is a figure which shows the disposable diaper which concerns on the said embodiment. It is a perspective view which shows the mounting state of a pants-type and a deployment-type disposable diaper. It is a figure which shows the underpants type disposable diaper which concerns on the said embodiment. It is a figure which shows the arrangement position of the overlapping opening part. It is sectional drawing which shows the joining state of the 1st and 2nd chassis. It is a perspective view which shows the opening expansion-contraction area | region of the disposable diaper which concerns on 1st Embodiment. It is a perspective view which shows the elastic back body area | region of the disposable diaper which concerns on 1st Embodiment. It is a perspective view which shows the elastic boundary area of the disposable diaper which concerns on 1st Embodiment. It is a perspective view which shows the wearing condition of the disposable diaper which concerns on 1st Embodiment. It is a perspective view which shows the state which extended the overlap opening part of FIG. It is a perspective view which shows the wearing condition of the disposable diaper which concerns on 2nd Embodiment. It is a perspective view which shows the state which extended the overlapping opening part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Front body 3 Back body 4 Crotch part 5 Overlapping opening part 7 Leg opening part 8 Joint part 9 Trunk opening part 11 Top sheet 12 Absorber 13 Chassis main body 13A 1st chassis 13B 2nd chassis 14 Back sheet 21 Joint Part 22, 22 Non-joined part

Claims (11)

A chassis body having at least a front body and a back body at the time of wearing, and a liquid permeability disposed along a longitudinal direction extending from the front body side to the back body side on the skin contact surface side of the chassis body A surface sheet, a non-skin contact surface side of the top sheet, a liquid-impermeable back sheet disposed on the skin contact surface side or non-skin contact surface side of the chassis body, and the surface A disposable diaper comprising a liquid retaining absorbent disposed between a sheet and the back sheet,
The chassis body includes a first chassis that forms a crotch portion side in the back body and the front body, and a second chassis that forms a trunk opening side of the front body ,
Wherein the around the predecessor of the chassis body, and overlapping portions are provided which are formed by overlapping the ends of the first chassis and the second chassis together,
The overlapping portions are disposed at positions spaced from the outer edges of the topsheet, the absorber, and the backsheet, and are spaced apart from each other across a substantially center line that extends in the longitudinal direction of the disposable diaper and bisects the width direction. The disposable diaper which has the junction part which joins the said 1st chassis and the said 2nd chassis in each said position, and the non-joining part which can be formed between this junction part and can form an opening . The disposable diaper has a body opening, a pair of leg openings, and a crotch portion by joining or locking the front body and the back body of the chassis main body in a predetermined position in advance or when attached. , And can be formed into a pants shape,
The disposable diaper according to claim 1, wherein at least a part of the chassis main body in a pants shape is formed to be stretchable or extendable. The chassis body in the pant shape has a substantially center in the back body of the trunk opening and a vicinity of the crotch part on the crotch direction side of the non-joint portion along the trunk circumference of the chassis body in the pant shape. It has an opening stretchable region formed by connecting,
The disposable diaper according to claim 2, wherein at least a part of the opening stretchable region is formed to be stretchable or stretchable.   The disposable diaper according to claim 3, wherein an expansion ratio at the time of expansion relative to a non-expansion region in the opening stretchable region is in a range of 1.1 to 4.0 times.   When the length of the trunk circumference at the time when the opening stretchable region is not stretched is 100%, the tensile stress when stretched until the length of the trunk stretch of the stretchable stretchable area reaches 150% is 20 N or less. The disposable diaper according to claim 3. The chassis main body in the pants shape includes an elastic boundary region formed in all or part of the vicinity of the boundary including the joining or locking position of the front body and the back body,
The disposable diaper according to claim 2, wherein at least a part of the elastic boundary region is formed to be extendable or contractible.   The disposable diaper according to any one of claims 1 to 6, wherein a reinforcing member having high rigidity is disposed on at least a part of the joint.   The disposable diaper according to any one of claims 1 to 7, wherein a guide sign indicating the presence of the non-joining portion is provided in the vicinity of the non-joining portion.   The disposable diaper according to claim 8, wherein the guide sign suggests the presence of the non-joined portion by giving a color.   The disposable diaper according to claim 8, wherein the guide sign indicates the presence of the non-joined part by unevenness. The disposable diaper according to any one of claims 1 to 10, wherein a string-like, band-like, or tongue-like handle portion that can be grasped and pulled is provided on the crotch portion side of the non-joint portion.

Images