JP5462232B2 - Disposable diapers - Google Patents

Description

  The present invention relates to a disposable diaper. It is related with the disposable diaper which has an opening part which can take out a male genitalia especially.

  Conventionally, examples of absorbent articles used by elderly people, disabled people, and the like include disposable diapers, training pants, and incontinence pants. All of these absorbent articles are properly used in accordance with the wearer's lifestyle and care level. Here, disposable diapers can be used as nursing hygiene products or excreted by holding or absorbing the excrement without leaking it to people who are difficult to excrete on their own, such as the elderly and disabled people. It is common to be used as an auxiliary tool for etc.

  However, disposable diapers may be used not only by people who have difficulty in urinating by themselves, but also by people who are capable of urinating by themselves. For example, it is a disabled person such as mild incontinence or an elderly person who can walk. However, people with disabilities who have mild incontinence or elderly people who can walk, have a sense of resistance to wearing 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 a urination outlet or the like for taking out the male genitalia as provided in typical male underwear during urination from the viewpoint of preventing leakage. As a result, when urinating by itself, an operation different from that during general urination, 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 absorptive article which enables men's genitals to be taken in and out even when wearing diapers 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 and areas for forming an opening through which the male genitals can be removed when worn, and the openings of the inner and outer sheets communicate with each other by shifting the intermediate sheet. Thus, a through hole can be formed on the ventral side. Thus, the genitals can be taken in and out even when the 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 and it was difficult to take out the male genitals. 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 was necessary to remove the fastening member and 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, since the intermediate sheet is fixed to the fixing member, there is a possibility that a peculiar sound is generated when the intermediate sheet is removed from the fixing member, that is, during urination. As a result, there is a possibility that it is noticed that a disposable diaper is worn around the patient during urination, 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-mentioned object, the present inventor provides an opening for urination at a predetermined position of the disposable diaper, and by forming a predetermined part of the disposable diaper so that it can be expanded and contracted, the urination action is facilitated. The headline and the present invention were completed. Specifically, it aims at providing the following disposable diapers.

  (1) A chassis having at least a front body and a back body, a liquid-permeable surface sheet disposed on at least a part of the chassis, and disposed on one side in the thickness direction of the surface sheet A liquid-impermeable back sheet, and a liquid-retaining absorbent disposed between the top sheet and the back sheet, wherein the disposable diaper is disposed in the front body An openable portion capable of separating a predetermined part of the front body along a separation line connecting points separated from each other across a substantially center line that extends in the longitudinal direction and bisects the width direction, or the front body The disposable diaper in which the opening part which can open the predetermined site | part is formed.

  (2) The absorber is formed substantially vertically and is disposed at least in the front body, and the openable portion or the opening is separated from a predetermined outer edge of the absorber in the front body. The disposable diaper as described in (1) formed in a position.

  (3) The disposable diaper is a pants shape having a trunk opening and a pair of leg openings by joining or locking the front body and the back body in a predetermined position in advance or at the time of wearing. And is a region that connects the substantially center part of the back body near the trunk opening in the pant shape and the vicinity of the openable part or the vicinity of the opening along the outer periphery in the pant shape. The disposable diaper according to (1) or (2), wherein at least a part of the opening stretchable region is stretchable or stretchable.

  (4) The disposable diaper according to (3), wherein the opening expansion / contraction region is formed so that an expansion ratio at the time of expansion to at least 1.1 times can be expanded.

  (5) The opening expansion / contraction region includes an elastic opening region formed at a predetermined position on the crotch direction side in the pants shape of the opening or the openable portion of the front body (3) or (4). Disposable diapers described in 1.

  (6) The disposable diaper according to (3) or (4), wherein the opening stretchable region includes an elastic back body region formed on all or part of the back body near the trunk opening in the back body.

  (7) The opening expansion / contraction region includes an elastic boundary region formed in all or part of the vicinity of the boundary portion including the joining position or the locking position of the front body and the back body (3) or (4) The disposable diaper described.

  (8) The disposable diaper according to any one of (1) to (7), wherein an auxiliary sheet is provided in the front body at the position including the openable portion or the opening.

  (9) The disposable diaper according to (8), wherein the auxiliary sheet includes an elastic member in whole or in part.

  (10) The disposable diaper according to (8) or (9), wherein the absorbent sheet is disposed on all or part of the auxiliary sheet.

  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.

It is a figure which shows the disposable diaper which concerns on 1st Embodiment of this invention. It is a perspective exploded view in the deployment state of the disposable diaper concerning a 1st 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 opening part which concerns on the said embodiment. It is a figure which shows the positional relationship of an opening part and an absorber. It is a figure which shows a masking sheet. It is a front view which shows the joining position of a masking sheet. It is sectional drawing which shows the joining position of a masking sheet. It is a front view which shows the arrangement position of an elastic member. 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 opened the opening part of the disposable diaper which concerns on 1st Embodiment. It is a perspective view which shows an expansion-contraction area | region. It is a perspective view which shows an expansion-contraction area | region. It is a perspective view which shows an expansion-contraction area | region. It is a perspective view which shows an expansion-contraction area | region. It is an expanded view which shows the disposable diaper which concerns on 2nd Embodiment. It is a figure which shows the disposable diaper which concerns on 2nd Embodiment. 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 opened the opening part of the disposable diaper which concerns on 2nd Embodiment. It is a perspective view which shows other embodiment of a masking sheet. It is a perspective view which shows the wearing condition of the disposable diaper which concerns on 3rd Embodiment. It is a perspective view which shows the state which opened the opening part of the disposable diaper which concerns on 3rd Embodiment. It is an expanded view which shows the disposable diaper which concerns on 4th Embodiment. It is a perspective view which shows the wearing condition of the disposable diaper which concerns on 4th Embodiment. It is a perspective view which shows the state which opened the opening part of the disposable diaper which concerns on 4th Embodiment.

  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. 1A is a front view of a disposable diaper according to the first embodiment of the present invention. FIG. 1B is a cross-sectional view taken along the line XX in FIG. FIG. 2 is an exploded perspective view of the disposable diaper according to the first embodiment in an expanded state. 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 of the disposable diaper according to the first embodiment. FIG. 4B is a front view of the disposable diaper of FIG. FIG. 5A is a front view showing the opening according to the first embodiment. FIG. 5B is a front view showing another form of the opening. FIG. 5C is a front view showing another form of the opening. FIG. 6A is a front view showing the positional relationship between the opening and the absorber. FIG. 6B is a development view showing the positional relationship between the opening and the absorber. FIG. 7A is a perspective view showing a masking sheet which is an auxiliary sheet. FIG. 7B is a perspective view showing another form of the masking sheet. FIG. 8A is a front view showing the bonding position of the masking sheet. FIG. 8B is a front view showing another bonding position of the masking sheet. 9A, 9B, 9C, 9D, and 9E are cross-sectional views showing the bonding position of the masking sheet. FIG. 10A is a front view showing the arrangement position of the elastic member. FIG. 10B is a front view showing another arrangement position of the elastic member.

  FIG. 11 is a perspective view showing a wearing state of the disposable diaper according to the first embodiment. FIG. 12 is a perspective view showing a state in which the opening of FIG. 11 is widened. FIG. 13A is a perspective view showing an opening / contraction region of the disposable diaper according to the first embodiment. FIG. 13B is a diagram illustrating a state in which the opening is opened as the opening stretchable region is extended. FIG. 14A is a perspective view showing an elastic opening region. FIG. 14B is a diagram illustrating a state in which the opening portion is opened by extending the elastic opening region. FIG. 15A is a perspective view showing an elastic back body region. FIG. 15B is a diagram illustrating a state in which the opening is opened as the elastic back body region expands. FIG. 16A is a perspective view showing an elastic boundary region. FIG. 16B is a diagram illustrating a state in which the opening is opened as the elastic boundary region expands. FIG. 17A is a development view showing the disposable diaper according to the second embodiment. FIG. 17B is a development view showing a positional relationship between the opening of the disposable diaper and the absorbent body according to the second embodiment. FIG. 18 (A) is a perspective view showing a disposable diaper according to the second embodiment. FIG. 18B is a YY cross-sectional view of FIG. FIG. 19 is a perspective view showing a wearing state of the disposable diaper according to the second embodiment. FIG. 20 is a perspective view showing a state in which an opening of the disposable diaper according to the second embodiment is widened.

  FIG. 21 is a perspective view showing another embodiment of the masking sheet. FIG. 22 is a perspective view showing a wearing state of the disposable diaper according to the third embodiment. FIG. 23 is a perspective view illustrating a state in which an opening of the disposable diaper according to the third embodiment is widened. FIG. 24 is a development view showing the disposable diaper according to the fourth embodiment. FIG. 25 is a perspective view showing a wearing state of the disposable diaper according to the fourth embodiment. FIG. 26 is a perspective view illustrating a state in which an opening of the disposable diaper according to the fourth embodiment is widened.

[1] First Embodiment [1.1] Overall Configuration The overall configuration of the disposable diaper according to the present invention will be described using the disposable diaper 1 in the first embodiment of the present invention. The disposable diaper 1 according to the first embodiment includes a disposable diaper main body 10 and an openable portion 5 formed at a predetermined position of the disposable diaper main body 10. The openable part 5 is used for taking out the male genitalia of the wearer. Therefore, the disposable diaper 1 according to the first embodiment is basically used for men.

  The openable part 5 intermittently cuts off cutting parts such as slits and openings along a separating line that connects points separated from each other across a substantially center line that extends in the longitudinal direction of the disposable diaper in the front body 2 and bisects the width direction. It is formed by continuously pulling a part of the openable part 5 on the crotch direction side in the crotch direction and opening the openable part 5 in use. The openable portion 5 is covered with a masking sheet 6 that is an auxiliary sheet.

  As shown in FIGS. 1 to 4, the disposable diaper main body 10 forms an outer shape of the disposable diaper main body 10, and is provided on the skin contact surface side of the chassis 13 that is formed into a pants shape when worn. The liquid-permeable surface sheet 11 formed in a substantially vertically long shape constituting the surface layer and the non-skin contact surface side of the chassis 13 which is one side of the surface sheet 11 are formed in a substantially vertically long shape constituting the back surface layer. The liquid-impermeable back sheet 14 that is formed, and the liquid that is disposed between the top sheet 11 and the chassis 13 that are between the top sheet 11 and the back sheet 14 and that is formed in a substantially vertically long shape that constitutes the absorption layer. Holding absorbent body 12. Here, “substantially vertically long” includes a substantially rectangular shape having a longitudinal direction and a transverse direction, and a part of both sides of the longitudinal direction is recessed in the central direction in the longitudinal direction, or opposite to the central direction. Including those raised in the direction. That is, the absorbent body includes a part having a different length in the width direction in a part of the longitudinal direction of the absorbent body. Further, the absorbent body may be disposed so as to be vertically long in the width direction, or may be disposed so as to be vertically long in the crotch direction.

  The absorbent body 12 may be arranged in a state of being wrapped in a tissue (not shown) or a hydrophilic nonwoven fabric (not shown). Moreover, when enveloping in the hydrophilic nonwoven fabric, it is good also as a structure which does not use the surface sheet 11, or a structure which uses the surface sheet 11 only partially. Thereby, for example, it is possible to reduce the production cost. Furthermore, the back sheet 14 may be a non-skin contact surface side of the back sheet 14 bonded with a nonwoven fabric or the like. Bonding a non-woven fabric or the like to the non-skin contact surface side of the back sheet 14 is preferable because the touch when the wearer is worn is improved. Further, when a film is used for the back sheet 14, it is preferable to bond a non-woven fabric or the like to the film, for example, because unpleasant sound caused by film rubbing can be prevented.

  The chassis 13 includes a front body 2, a back body 3, and a crotch part 4 formed between the front body 2 and the back body 3 when worn. The chassis 13 is formed in a pants shape by joining the front body 2 and the back body 3 at a joint 8 that is a predetermined position between the front body 2 and the back body 3. That is, it has the trunk | drum opening part 9 located around a wearer's abdomen in a wearing condition, and a pair of leg opening part 7 located in each of a wearer's both legs. Here, the predetermined positions of the front body 2 and the back body 3 are the legs of the front body 2 and the back body 3 in the direction perpendicular to the crotch direction in the worn state (hereinafter referred to as the width direction). This refers to the portion excluding the opening 7. Moreover, the front body 2 and the back body 3 include what is distinguished by the width direction centerline which bisects the longitudinal direction of the disposable diaper 1, for example.

  In the present embodiment, as shown in FIG. 3A, the body opening 9 and the pair of leg openings 7 are formed by joining the front body 2 and the back body 3 at a predetermined joint 8. Although the disposable diaper 1 formed in the pants type | mold which has is demonstrated, in this invention, it is not restricted to this. For example, the front body 2 and the back body 3 as shown in FIG. 3 (B) may be used in a deployable disposable diaper 1A that can be worn by locking with a locking member 8A or the like. Further, for example, locking of a hook-and-loop fastener that can be re-locked as used in the unfolded disposable diaper 1A at a predetermined joint portion 8 of the front body 2 and the back body 3 of the disposable diaper formed in a pants shape. It may be used for a disposable diaper that is locked by a member and can be easily released from the diaper while the pant-type disposable diaper is released and re-locked while being a pant-type disposable diaper.

  The top sheet 11 and the absorber 12 are formed substantially vertically long, and are arranged along the crotch 4 from the front body 2 to the back body 3 of the chassis 13. The openable portion 5 is formed at a predetermined position of the chassis 13 in the front body 2 of the disposable diaper main body 10. For example, the front body 2 may be disposed substantially parallel to the outer edge 41 that is one side of one end in the longitudinal direction of the absorbent body 12 at a position separated from the absorbent body 12 by a predetermined distance.

  Furthermore, in this invention, the leak-proof wall formed using an elastic member and a leak-proof sheet, what is called leg gathers (not shown) is arrange | positioned along the both ends of the width direction of the absorber 12 of the disposable diaper 1. Also good. Specifically, a leak-proof sheet is provided so as to extend in the width direction of the absorber 12 from between the absorber 12 and the chassis 13 or the back sheet 14, and at least one end of the leak-proof sheet in the width direction. Two or more elastic members may be arranged and 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 leg gather extends from the absorbent body 12 in the width direction of the absorbent body 12, the distance between the absorbent body 12 and the elastic member in the leg gather is approximately the center region in the longitudinal direction of the absorbent body 12. It is preferable that it exists in the range of 20 mm or more. Further, in the case where the leg gathers are folded back, the distance between the absorbent body 12 and the elastic members in the leg gathers is 20 mm or more in a state where the leak-proof sheet of the leg gathers is expanded in the width direction in the substantially central region. It is preferable to be in the range.

[1.2] Disposable diaper main body As shown in FIGS. 4A and 4B, the disposable diaper main body 10 is formed by joining the front body 2 and the back body 3 at a predetermined joining portion 8. It is formed in a pants shape having an opening 9 and a pair of leg openings 7.

  The length in the rise direction of the disposable diaper main body 10 formed in a pants shape (maximum length in the rise direction from the crotch 4 to the trunk opening 9) is, for example, 350 mm to 450 mm it can. Moreover, the maximum length between each junction part 8 in the expansion | deployment state of the direction (henceforth the width direction) orthogonal to the crotch direction of the disposable diaper main body 10 can illustrate 425 mm to 900 mm, 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. The maximum length is a length obtained by stretching the disposable diaper main body 10 in a width direction and a crotch or crotch direction in a state where the disposable diaper main body 10 is contracted by an elastic force such as a thread-like elastic member or a stretchable base sheet. Including

  Moreover, when using the disposable diaper 1 for children, for example, the length in the crotch direction of the disposable diaper main body 10 for children in a state before wearing formed in a pants shape is, for example, 200 mm to 300 mm it can. Moreover, the maximum length between each junction part 8 in the expansion | deployment state of the width direction of the disposable diaper main body 10 for children can illustrate 300 mm to 450 mm, for example.

  The disposable diaper main body 10 forms the outer shape of the disposable diaper main body 10 and is formed in a pants-shaped chassis 13 when worn, and is provided on the skin contact surface side of the wearer and is formed in a substantially vertically long shape constituting a surface layer. A liquid-permeable topsheet 11, a liquid-retaining absorbent body 12 disposed between the topsheet 11 and the chassis 13 and formed in a substantially vertical shape constituting the absorbent layer, and the non-skin contact of the wearer And a liquid-impermeable back sheet 14 provided on the contact surface side and formed in a substantially vertically long shape constituting the back layer.

  In the first embodiment, the back sheet 14 is arranged on the non-skin contact surface side of the wearer. However, in the present invention, the back sheet 14 is not limited to this, and is between the absorber 12 and the chassis 13 or the chassis. When 13 is formed from a plurality of sheets, it may be provided between the sheets.

  Here, the top sheet 11 and the absorbent body 12 are joined so that each is bonded by a hot melt adhesive. Moreover, the surface sheet 11, the absorber 12, and the chassis 13 are joined so that each is pasted by a hot-melt adhesive. Similarly, the chassis 13 and the back sheet 14 are joined so that each is pasted by a hot melt adhesive.

Examples of the coating pattern for 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.

  The front body 2 and the back body 3 are joined intermittently at the joint 8 by ultrasonic sealing. Moreover, as another joining method in a joining part, joining by a heat seal, a hot-melt adhesive agent, etc. can be illustrated.

  As shown in FIGS. 4A and 4B, the disposable diaper main body 10 has a plurality of thread-like elastic members 91 arranged in the peripheral region of the trunk opening 9. The elastic member 91 may be a belt-like member. The elastic member 91 may be an elastic sheet having elasticity such as a stretchable nonwoven fabric (such as a nonwoven fabric formed from a mixed fiber of polyurethane and polypropylene) or a stretchable film.

  A thread-like elastic member or an elastic sheet having elasticity such as an elastic nonwoven fabric or an elastic film may be disposed on all or part of the front body 2 and the back body 3 of the disposable diaper main body 10. Further, an elastic sheet having elasticity can be used for the chassis 13.

[1.3] Openable portion As shown in FIG. 5 (A), the openable portion 5 is formed, for example, by continuously forming cutting portions a such as slits and openings intermittently (interval b). An opening having a predetermined size can be obtained by breaking the adjacent portions between the cut portions a (for example, perforated). Here, as the maximum length of the openable portion 5 in the expanded state, for example, a length in a range of 100 mm or more and within 60% of the maximum length in the width direction in the expanded state of the disposable diaper body 10 can be exemplified. Furthermore, it is 120 mm or more, and the length in the range within 40% of the length concerning the width direction of the disposable diaper main body 10 is preferable. This is because the length of the openable portion 5 needs to be 100 mm or more in order to take out the wearer's male genitalia. Moreover, when the length of the openable part 5 exceeds the range of 60% of the length in the width direction of the disposable diaper main body 10, it becomes difficult to pull up the disposable diaper when worn, making it difficult to use. It is because it ends.

  Specifically, when the length in the width direction of the disposable diaper 1 is 550 mm, the length of the openable portion 5 can be exemplified as 200 mm.

  As a pitch of the cutting part a formed intermittently continuously, for example, the cutting part a in the range of 1.0 mm to 20.0 mm is continuously formed at an interval b in the range of 0.5 mm to 5.0 mm. Can be provided. Preferably, the range of the cutting part a can be exemplified by a range of 2.0 mm to 8.0 mm. Moreover, the range of the space | interval b can illustrate the range of 1.0 mm to 3.0 mm. In addition, it is preferable that the cutting part a is the same length as the space | interval b, or is longer than the space | interval b.

  The openable part 5 may be provided with a cleaving part (not shown) of 25 mm to 60 mm at a substantially central part of the openable part 5. In addition, a cleavage part means what cut | disconnected a part of chassis 13 in the opening possible part 5. FIG. Thus, by providing the cleaving portion at the approximate center of the openable portion 5, for example, the wearer can insert a finger or the like into the cleaving portion, and the openable portion 5 can be easily opened therefrom. become. Further, when reinforcing members to be described later are provided at both ends of the openable portion 5, it is preferable that a cleavage portion is provided in advance in the portion of the openable portion 5 that covers the reinforcing member. This is because if a plurality of cut portions a formed intermittently and continuously up to the portion related to the reinforcing member are formed, it is difficult to separate the cut portions a related to the reinforcing member.

  As a length of the cleaving part provided in the substantially center part of the openable part 5, specifically, 40 mm can be illustrated. Moreover, specifically, 30 mm can be exemplified as the length of the cleavage portion in the openable portion 5 according to the reinforcing member. For example, when the length of the openable portion 5 is 200 mm, the length of the cleaved portion on the reinforcing member at both ends is set to 30 mm, the length of the cleaved portion at the substantially central portion is set to 40 mm, and It can be exemplified that the cut part a is 4.0 mm and the interval b is 1.0 mm between each of the cleavage parts and the cleavage part at the substantially central part.

  In addition, although the opening possible part 5 in this 1st Embodiment formed the cutting parts a, such as a slit and an opening, intermittently continuously, it is not restricted to this in this invention. For example, as shown in FIG. 5 (B), the openable portion 5 is formed with a part of the chassis 13 thinner than the other chassis 13, thereby reducing the strength of the other parts, It may be formed by a separation line that can be separated. Moreover, although the opening possible part 5 was formed with the straight line, in this invention, it is not restricted to this, For example, you may form with the combination of a curve and a straight line and a curve. Further, as shown in FIG. 5 (C), the openable portion 5 is formed by notching a part of the absorber 12 and bending or straightly forming a portion corresponding to the notch. Also good. Alternatively, a region for the openable portion 5 may be provided in a part of the absorber 12, and the openable portion 5 may be provided inside the absorber 12.

  In the case where the cut portions a such as slits and openings are formed intermittently continuously or when the openable portion 5 is formed by a separating line, the chassis 13 is provided to prevent both ends of the openable portion 5 from breaking. It is preferable to join a reinforcing member (not shown) to both ends of the openable portion 5 in FIG. In the case where the chassis 13 is composed of a plurality of sheets, the reinforcing member may be sandwiched and joined between the chassis 13 at locations corresponding to both ends of the openable portion 5.

  As the reinforcing member, for example, a member such as a nonwoven 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 is used. be able to. As a magnitude | size of the member for reinforcement, the magnitude | size of vertical (crotch direction) 60 mm x horizontal (width direction) 40 mm can be illustrated, for example. The reinforcing member may be bonded to both ends of the openable portion 5 using, for example, hot melt bonding, heat sealing, ultrasonic sealing, or the like. Moreover, when the chassis 13 which comprises the front body 2 is formed with two or more sheets, you may arrange | position between each chassis 13 and may join or fix the said part from both surfaces.

  In addition, the openable portion 5 may be formed with a shape of a figure made of a smooth curve such as a circle or an ellipse at both ends thereof. Specifically, holes having a graphic shape formed of a smooth curve such as a circle or an ellipse may be provided at both ends of the openable portion 5. Thus, by providing the holes of a predetermined shape at both ends of the openable portion 5, when the openable portion 5 is opened, the tearing resistance at both ends can be increased. Also, in the case of having an openable portion 5 having a shape other than a cut line a that is formed intermittently and continuously, such as slits and openings, holes having a predetermined shape are formed at both ends of the openable portion 5. By providing, it becomes possible to disperse the force applied to both ends of the openable portion 5 when the openable portion 5 is opened, and it is possible to prevent breakage of both ends of the openable portion 5.

  Furthermore, you may put the further cut line which goes to the direction different from the direction of the slit of the said openable part, or the cut line in the both ends of the openable part 5. FIG. The cut lines at both ends may be arc-shaped, curved or straight. Thus, by providing the cut lines extending in a predetermined direction at both ends of the openable portion 5, when the openable portion 5 is opened, the tearing resistance at both ends can be increased.

  Although the openable part 5 in the first embodiment is formed in a straight line by intermittently and continuously forming cutting parts a such as slits and openings, the present invention is not limited to this. For example, it may be formed into a curved line, a straight line formed by connecting two points straddling a substantially central line that extends in the longitudinal direction of the disposable diaper in the front body 2 and bisects the width direction, and a linear combination thereof. . Specifically, it may be formed in a wave shape, a mountain shape, or the like. Moreover, it is good also as a structure which can cut out part or all of the opening possible part 5. FIG. For example, the openable portion 5 may be formed in a circular shape, an elliptical shape, a polygonal shape, or the like, and a part or all of the portion may be cut out.

  In order to make it easy to recognize the position of the openable portion 5, the openable portion 5 is provided with a color on the crotch direction side or the crotch direction side of the openable portion 5, and uneven processing such as embossing is performed. It is good also as a structure to give. Thus, it is good also as a structure which attach | subjects the label | marker which makes it easy to recognize the position of the opening possible part 5 by vision or a tactile sense. By attaching such a visual or tactile marker, for example, when the wearer himself urinates, the position of the openable portion 5 can be easily recognized and the urination action becomes easier, which is preferable. In addition, for example, even when assisting urination of a bedridden patient or the like, the caregiver can easily recognize the position of the openable portion 5 of the diaper worn by the patient or the like. It can be easily performed.

  Furthermore, you may provide opening assistance tools, such as a handle, in the opening possible part 5. FIG. By providing such an opening assisting tool, for example, the wearer can easily separate the openable portion using the opening assisting tool, which is preferable. In addition, for example, when assisting urination of a bedridden patient or the like in nursing care, the openable portion 5 of the diaper can be easily expanded.

[1.4] Arrangement Position of Openable Portion As shown in FIG. 6A, the openable portion 5 is in the range of the waist region 23 in the front body 2 and is a predetermined outer edge 41 of the absorber 12. It is preferable that the front body 2 is provided at a position separated by a predetermined distance from one side extending in the width direction of the substantially vertically long absorbent body 12. Here, the position separated by a predetermined distance includes, for example, a position separated in the crotch direction and a position separated in the crotch direction. Therefore, the openable part 5 may be configured to provide the openable part 5 in a part of the absorber 12 as long as the openable part 5 is in the range of the waist circumference region 23. In this case, it is preferable to form the absorber 12 by sealing the periphery of the openable portion 5 so that the material of the absorber 12 does not leak.

  For example, as shown in FIG. 6B, the opening position of the openable portion 5 is defined as c, which is a distance from the end of the trunk opening 9 to the lower end of the openable portion 5. When the distance to the longitudinal center L in the state is d and the distance from the end of the trunk opening 9 to the longitudinal center L in the deployed state is e, the value corresponding to d / c is 0. It is preferably 65 or more and in the range of 8.0 or less.

  Specifically, in the openable portion 5, the distance c from the end of the trunk opening 9 to the lower end of the openable portion 5 is preferably in the range of 50 mm to 270 mm. Moreover, it is preferable that the distance d from the lower end of the openable part 5 to the longitudinal center part L in the unfolded state is in the range of 180 mm to 400 mm. Further, it is preferable that the distance e from the end portion of the trunk opening 9 to the central portion L in the longitudinal direction in the unfolded state is in the range of 350 mm to 450 mm.

  The openable portion 5 is preferably provided on the crotch direction side of the absorbent body 12. That is, the openable portion 5 has a distance from the end in the longitudinal direction of the front body 2 of the absorbent body 12 to the center L in the longitudinal direction in the deployed state, and the front body 2 of the absorbent body 12 from the lower end of the opening 5. In the case where g is the distance to the end in the longitudinal direction, the value corresponding to d / f is preferably in a range larger than 1.0 and smaller than 2.3. Specifically, the absorber 12 preferably has a distance f from the longitudinal end of the front body 2 of the absorbent body 12 to the longitudinal central portion L in the deployed state in the range of 175 mm to 395 mm. Moreover, it is preferable that the distance g from the lower end of the opening part 5 to the edge part 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 openable portion 5 has a distance c from the end of the trunk opening 9 to the lower end of the openable portion 5. Is preferably in the range of 35 mm to 180 mm. Moreover, it is preferable that the distance d from the lower end of the opening possible part 5 to the longitudinal direction center part L in the expansion | deployment state exists in the range of 120 mm to 265 mm. Moreover, it is preferable that the distance e from the edge part of the trunk | drum opening part 9 to the longitudinal direction center part L in the expansion | deployment state exists in the range of 200 mm to 300 mm.

  Similarly, the absorbent body 12 for children is preferably such that the distance f from the longitudinal end portion of the front body 2 of the absorbent body 12 to the longitudinal central portion L in the deployed state is in the range of 115 mm to 260 mm. . Moreover, it is preferable that the distance g from the lower end of the opening possible part 5 to the edge part of the longitudinal direction in the front body 2 of the absorber 12 exists in the range of 5 mm to 150 mm.

[1.5] Masking Sheet As shown in FIG. 7A, the masking sheet 6 is formed in a substantially rectangular shape. The masking sheet 6 is joined to the skin contact surface side or non-skin contact surface side of the chassis 13 so as to cover the openable portion 5. The length in the longitudinal direction of the masking sheet 6 is formed to be longer than the length in the width direction of the openable portion 5. That is, the masking sheet 6 only needs to have a length that can cover the entire width of the openable portion 5.

  The masking sheet 6 is sandwiched between a pair of belt-like base sheets 61 and 62 in a state where a plurality of elastic members 63 formed in a thread shape are stretched, and adheres each of the base sheets 61 and 62 and is made of an elastic member. It has what is called gathers formed by releasing tension. In other words, the masking sheet 6 can be extended by the amount of this gather. In other words, the gather is configured to disappear by extending the masking sheet 6. Thus, for example, when the masking sheet 6 is worn, the masking sheet 6 comes into contact with the abdomen of the wearer by the elastic force of the elastic member 63, and when the wearer opens the openable part 5, the openable part is provided. 5 follows the open state and can be expanded by the amount of gathers.

  Further, as shown in FIG. 7B, the masking sheet 6 may be formed by adhering an elastic member 64 and a base sheet 61 formed in a band shape. The masking sheet 6 may be formed by sandwiching a belt-like elastic member 64 between a pair of base material sheets 61 and 62 and bonding the base material sheets 61 and 62 respectively. Further, the masking sheet 6 may be formed by folding one base sheet 61 and sandwiching elastic members 63 and 64 therebetween. The masking sheet 6 may use a base sheet such as a stretchable nonwoven fabric as the belt-like elastic member, and may be used as the masking sheet 6.

  The masking sheet 6 is joined to the chassis 13 at the joining portion 65 so as to cover the entire openable portion 5 formed in the front body 2. Here, as the joint portion 65 between the chassis 13 and the masking sheet 6, for example, as shown in FIG. 8A, the masking sheet 6 includes a part of the crotch direction side of the openable portion 5 and the masking sheet 6. You may join each of the longitudinal direction both ends. Further, as shown in FIG. 8B, the masking sheet 6 may be joined to the chassis 13 at a part of the crotch direction side of the openable portion 5 and at both ends in the longitudinal direction of the masking sheet 6. In addition, the joining part 65 may be joined continuously to the chassis 13 or may be joined at a predetermined interval.

  Further, as shown in FIG. 9A, the masking sheet 6 may be joined on the crotch direction side of the openable portion 5 on the skin contact surface side of the chassis 13, as shown in FIG. 9B. The masking sheet 6 may be joined on the crotch direction side of the openable portion 5 on the non-skin contact surface side of the chassis 13. Further, as shown in FIG. 9C, the masking sheet 6 may be joined on the crotch direction side of the openable portion 5 on the skin contact surface side of the chassis 13, as shown in FIG. 9D. The masking sheet 6 may be joined on the crotch direction side of the openable portion 5 on the non-skin contact surface side of the chassis 13. 9E, when the masking sheet 6 is joined on the crotch direction side of the openable portion 5 on the skin contact surface side of the chassis 13, the masking sheet 6 is joined by the top sheet 11. You may form so that the part 65 may be covered.

  As described above, the masking sheet 6 includes the elastic member 63 in its entirety or in part. For example, when the masking sheet 6 is provided on the non-skin contact surface side of the openable portion 5, The chassis 13 can be brought into contact with the skin of the wearer and the skin of the wearer can be prevented from being exposed. Further, when the masking sheet 6 is provided on the skin contact surface side, the chassis 13 in the openable portion 5 can be drawn toward the wearer's skin side, and the wearer's skin and the like are exposed. Can be prevented.

  Further, the masking sheet 6 may be provided with an absorber on all or part thereof. Thereby, for example, even when urine is spilled before taking out the male genitals during urination, the spilled urine can be absorbed by the masking sheet 6.

[1.6] Elastic member in the vicinity of the opening As shown in FIG. 10A, the masking sheet 6 is joined to the crotch direction side of the openable portion 5 on the skin contact surface side of the chassis 13 (FIG. 9 ( For A), it is preferable to provide an elastic member in at least a part of the crotch region 51 in the vicinity of the openable portion 5. The elastic member may be thread-like or sheet-like.

  Further, as shown in FIG. 10 (B), when the masking sheet 6 is joined on the crotch direction side of the openable portion 5 on the skin contact surface side of the chassis 13 (see FIG. 9 (C)), the opening is possible. It is preferable to provide an elastic member in at least a part of the crotch region 52 near the portion 5. The elastic member may be thread-like or sheet-like.

  In this way, the openable portion 5 can be opened and closed as necessary without exposing the wearer's skin by joining the masking sheet 6 on which the elastic member is disposed to the chassis 13.

[1.7] Usage Mode A usage mode of the disposable diaper 1 in the first embodiment of the present invention will be described.

  As shown in FIG. 11, the disposable diaper 1 in 1st Embodiment is formed in the underpants type, and a wearer is a diaper which can wear and use similarly to normal pants. At the time of urination, the wearer uses a part of the crotch direction side in the vicinity of the openable part 5 formed by intermittently and continuously forming cutting parts such as slits and openings, or the trunk opening 9 in the front body 2. By pulling a part, the openable portion 5 is cleaved to form an opening. Next, as shown in FIG. 12, for example, the wearer grasps the approximate center portion of the opening of the openable portion 5 with a finger or the like, or hooks the finger and pulls it in the crotch direction. Thereby, the opening of the openable portion 5 extends in the crotch direction, and an opening having a predetermined size can be secured. That is, when the wearer grasps the approximate center part of the opening of the openable part 5 with a finger or the like, or is hooked on the finger and pulled in the crotch direction, the wearer can open the approximate center part of the rear body 3 in the vicinity of the trunk opening 9 Opening is possible because at least a part of the opening expansion / contraction region 53 (see FIG. 13A), which is a region connecting the substantially central portion of the front body 2 in the vicinity of the portion 5 along the outer periphery of the pants shape, is extended by elastic force. The opening of the portion 5 extends in the crotch direction, and it becomes easy to secure an opening of a predetermined size (see FIG. 13B).

  For example, as shown in FIGS. 14A and 14B, the elastic opening region 54 is formed by using an elastic member that can be expanded and contracted on the crotch direction side in the opening direction of the openable portion 5. It is good also as the opening expansion-contraction area | region 53. Further, for example, as shown in FIGS. 15A and 15B, an elastic rear body region 55 is provided by using an elastic member that can be expanded and contracted in the periphery of the rear body 3 in the vicinity of the trunk opening 9, It is good also as the opening expansion-contraction area | region 53. FIG. Furthermore, for example, as shown in FIGS. 16 (A) and 16 (B), the elasticity which can be expanded and contracted in all or part of the boundary region including the joining or locking position of the front body 2 and the back body 3. By using a member, the elastic boundary region 56 may be provided, and the opening stretchable region 53 may be used. A combination of each of the opening elastic region 54, the elastic back body region 55 and the elastic boundary region 56 may be provided as the opening expansion / contraction region 53.

  In addition, when the openable part 5 is in a state where it is not open before use, such as when a slit or an opening or the like is intermittently formed continuously, the inseam direction across the openable part 5 or It is necessary to open the openable portion 5 in advance by pulling part of the crotch direction.

  Thus, the wearer can secure an opening of a predetermined size with one hand, so that the male genital can be easily taken out. As a result, the wearer can easily urinate without taking off the diaper. Moreover, since the opening direction in the openable part 5 is toward the crotch direction and the opening shape is in the width direction of the disposable diaper, for example, regardless of whether it is a right-handed person or a left-handed person, it can be easily The openable portion 5 can be opened. Moreover, since the masking sheet 6 having elasticity is joined to the skin contact surface side of the openable portion 5, it becomes possible to contact the abdomen of the wearer at normal time and after urination, and the skin is unnecessary. It is possible to prevent exposure.

[2] Other Embodiments A second embodiment to a fourth embodiment of the present invention will be described with reference to FIGS. The second embodiment shows another embodiment in which the openings 5B are formed by overlapping the chassis 13A and 13B at predetermined positions in the front body 2. 3rd Embodiment arrange | positions an elastic member in the boundary part of the front body 2 and the back body 3, and the stress of the part of the crotch direction side of the openable part 5C and the crotch direction side is smaller than the stress of the other part. Another embodiment is shown. In the fourth embodiment, an opening 5D is formed by overlapping the chassis 13C and the chassis 13D at a predetermined position in the front body 2, and an elastic member is disposed at the boundary between the front body 2 and the back body 3 to open the opening 5D. Another embodiment is shown in which the stress of the portion on the crotch direction side and the crotch direction side of the portion 5D is made smaller than the stress of the other portions.

  In the following embodiments, 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.

[2.1] Second Embodiment A disposable diaper 1B according to a second embodiment of the present invention will be described with reference to FIGS. As shown in FIGS. 17-20, the disposable diaper 1B in 2nd Embodiment differs from 1st Embodiment in the structure which forms the opening part 5B. Specifically, as shown in FIG. 17, the opening 5B is provided with an overlap margin by overlapping a predetermined amount of the chassis 13B formed in a substantially rectangular shape at a predetermined position in the front body 2 of the chassis 13A. The front body 2 is formed by joining at a pair of joint portions 21 which are both sides of the main body. The overlap allowance can be opened by providing the non-joining portion 22 at the substantially central portion of the front body 2. In this way, the disposable diaper 1B in the second embodiment has the opening 5B.

  The maximum length of the opening 5B in the expanded state is, for example, 100 mm or more, and can be exemplified by a length within a range of 60% or less of the maximum length in the width direction in the expanded state of the disposable diaper body 10. Furthermore, it is 120 mm or more, and the length in the range within 40% of the length concerning the width direction of the disposable diaper main body 10 is preferable. This is because the length of the opening 5B needs to be 100 mm or more in order to take out the wearer's male genitalia. Moreover, when the length of the opening 5B exceeds the range of 60% of the length in the width direction of the disposable diaper main body 10, it becomes difficult to pull up the disposable diaper at the time of wearing, and it becomes difficult to use. Because.

  Examples of the length of the overlap allowance in the front body 2 include a range of 15 mm or more. Furthermore, it is preferable that it is 30 mm or more. In addition, the non-joining portion 22 is provided with a plurality of elastic members 63 formed in a thread shape in part or in whole. In addition, as the elastic member 63, you may use the elastic member formed in the strip | belt shape. For example, an elastic nonwoven fabric or an elastic film may be used.

  Further, the non-joining portion 22 that can be opened has a predetermined shape such as a dot shape, and a part of the non-joining portion 22 may be joined in a state that can be easily peeled off. That is, all of the non-joining portions 22 may be unjoined, or may be joined by a joining means that can easily peel a part thereof. Examples of the bonding method of the bonding portion 21 include bonding by hot melt bonding, heat sealing, ultrasonic sealing, and the like.

  In addition, the opening 5B has a configuration in which, for example, the crotch direction side or the crotch direction side of the opening 5B is colored, or an uneven process such as embossing is performed in order to easily recognize the position of the opening 5B. Also good. Thus, it is good also as a structure which attach | subjects the label | marker which makes it easy to recognize the position of the opening part 5B by vision or a tactile sense. By attaching such a visual or tactile marker, for example, when the wearer himself urinates, the position of the opening 5B can be easily recognized, and the urination action becomes easier, which is preferable. In addition, for example, even when assisting urination of a bedridden patient or the like, the caregiver can easily recognize the position of the opening 5B of the diaper worn by the patient or the like, so that urination assistance in nursing can be easily performed. Can be performed.

  Furthermore, you may provide opening auxiliary tools, such as a handle, in the opening part 5B. By providing such an opening assisting tool, for example, the wearer can easily separate the openable portion using the opening assisting tool, which is preferable. In addition, for example, when assisting urination of a bedridden patient or the like in nursing care, the diaper opening 5B can be easily widened.

  The opening 5 </ b> B is preferably in the range of the waist region 23 in the front body 2. That is, the opening 5 </ b> B is provided at a predetermined distance from a predetermined outer edge of the absorber 12, that is, one side extending in the width direction of the absorber 12 in the front body 2. As the arrangement position of the opening 5B, for example, the distance from the end of the trunk opening 9 to the upper end of the chassis 13A is h, and the distance from the upper end of the chassis 13A to the central portion L in the longitudinal direction in the unfolded state is i. The value corresponding to i / h is 0.65 or more and in the range of 8.0 or less, where j is the distance from the end of the trunk opening 9 to the longitudinal center L in the deployed state. Is preferred.

  Specifically, in the opening 5B, the distance h from the end of the trunk opening 9 to the upper end of the chassis 13A is preferably in the range of 50 mm to 270 mm. Moreover, it is preferable that the distance i from the upper end of the chassis 13A to the central portion L in the longitudinal direction in the unfolded state is in the range of 180 mm to 400 mm. Further, it is preferable that the distance j from the end portion of the trunk opening 9 to the central portion L in the longitudinal direction in the deployed state is in the range of 350 mm to 450 mm.

  The opening 5B is preferably provided on the crotch direction side of the absorbent body 12. That is, the opening 5B has a distance from the end in the longitudinal direction of the front body 2 of the absorber 12 to the center L in the longitudinal direction in the unfolded state, k, and the longitudinal length of the absorber 12 in the front body 2 from the upper end of the chassis 13A. When the distance to the end in the direction is 1, it is preferable that the value corresponding to i / k is in a range larger than 1.0 and smaller than 2.3. Specifically, the absorber 12 preferably has a distance k from the end in the longitudinal direction of the front body 2 of the absorber 12 to the center L in the longitudinal direction in the deployed state in the range of 175 mm to 395 mm. Moreover, it is preferable that the distance l from the upper end of chassis 13A to the edge part of the longitudinal direction in the front body 2 of the absorber 12 exists in the range of 5 mm to 225 mm.

  As the disposable diaper for children used by children, which is smaller than the disposable diaper 1 according to this embodiment, for example, the opening 5B has a distance h from the end of the trunk opening 9 to the upper end of the chassis 13A from 35 mm. It is preferably in the range of 180 mm. Moreover, it is preferable that the distance i from the upper end of the chassis 13A to the central portion L in the longitudinal direction in the unfolded state is in the range of 120 mm to 265 mm. Moreover, it is preferable that the distance j from the edge part of the trunk | drum opening part 9 to the longitudinal direction center part L in the unfolded state exists in the range of 200 mm to 300 mm.

  Similarly, the absorbent body 12 for children is preferably such that the distance k from the longitudinal end portion of the front body 2 of the absorbent body 12 to the longitudinal central portion L in the unfolded state is 115 mm to 260 mm. . Moreover, it is preferable that the distance l from the upper end of chassis 13A to the edge part of the longitudinal direction in the front body 2 of the absorber 12 exists in the range of 5 mm to 150 mm.

  Moreover, as shown in FIG. 18, it is preferable to provide an elastic member on at least one side in the vicinity of the opening 5B of the chassis 13A and the chassis 13B. In this case, the elastic member may be thread-like or sheet-like. The elastic member may be provided on both sides in the vicinity of the opening 5B of the chassis 13A and the chassis 13B.

  As shown in FIGS. 19 and 20, for example, as shown in FIGS. 19 and 20, the disposable diaper 1 </ b> B hooks a finger at the center of the chassis 13 </ b> A in the opening 5 </ b> B formed in the non-joint portion 22. pull. As a result, the elastic back body region 55, which is a part of the opening expansion / contraction region 53, is stretched by elastic force, so that the opening of the opening 5B is stretched in the crotch direction, and it is easy to secure an opening of a predetermined size. Become.

  As described above, in the front body 2, the chassis 13A and the chassis 13B are overlapped to provide the opening 5B composed of the joining portion 21 and the non-joining portion 22, and the elastic member 63 is disposed in the opening 5B. It becomes possible to provide the opening part 5 which can be opened as needed. Further, even when the non-joining portion 22 is joined in the above-described dot shape, since the joining can be easily peeled off, it is possible to similarly provide an opening 5B that can be opened as necessary. . In the second embodiment, the masking sheet 6 is not disposed. However, the present invention is not limited to this. Similarly to the first embodiment, the masking sheet 6 may be arranged in the second embodiment.

[2.2] Third Embodiment A disposable diaper 1 </ b> C according to a third embodiment of the present invention will be described with reference to FIGS. 21 to 23. As shown in FIG. 22, the disposable diaper 1 </ b> C according to the third embodiment is a thread-like elastic member, or a stretchable nonwoven fabric or stretch film in the vicinity of the boundary including the joining or locking position between the front body 2 and the back body 3. An elastic boundary region 56 is provided by arranging a belt-like elastic member such as the like. As a result, in the waist region 23, the stress in the crotch direction and the crotch direction of the openable portion 5C is smaller than the stress in the other portions. In the vicinity of the leg opening 7, the thread-like elastic member or the belt-like elastic member such as a stretchable nonwoven fabric or stretchable film may or may not be disposed on the entire circumference or a part thereof. May be.

As shown in FIG. 21, the masking sheet 6C according to the disposable diaper 1C according to the third embodiment uses one nonwoven fabric 67 having a basis weight of 10 g / m ² to 30 g / m ² or a laminate of a plurality of sheets. can do. In this case, the masking sheet 6C does not necessarily require an elastic member. Further, when the masking sheet 6C is composed of a plurality of nonwoven fabrics 67, it is formed by laminating a liquid-impermeable sheet 66 such as a polyethylene (PE) or polypropylene (PP) film on any layer of the nonwoven fabric 67. May be.

  As described above, the disposable diaper 1C according to the third embodiment reduces the stress in the crotch direction and crotch direction portions of the openable portion 5C smaller than the stress in the other portions, thereby allowing the openable portion 5C in the mounted state to be opened. The length can be kept close to the maximum length, and the elastic boundary region 56 that is a part of the opening stretchable region 53 is stretched by elastic force, so that the opening of the openable portion 5C is stretched in the crotch direction, It becomes easy to secure an opening of a predetermined size.

[2.3] Fourth Embodiment A disposable diaper 1D according to a fourth embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 24, the disposable diaper 1D in the fourth embodiment is different from the first embodiment in the configuration for forming the opening 5D. Specifically, the opening 5D provides an overlap margin by overlapping a predetermined amount of the chassis 13D formed in a substantially rectangular shape at a predetermined position in the front body 2 of the chassis 13C, and is an end portion of the overlap margin. The front body 2 is formed by bonding at the pair of bonding portions 21. The overlap allowance can be opened by providing the non-joining portion 22 at the substantially central portion of the front body 2.

  The non-joining portion 22 has a predetermined shape such as a dot shape, and a part thereof may be joined in a state where it can be easily peeled off. That is, the whole non-joining part 22 may be non-joining, or a weak joining part to such an extent that a part thereof can be easily peeled off may be provided. Examples of the bonding method of the bonding portion 21 include bonding by hot melt bonding, heat sealing, ultrasonic sealing, and the like.

  Examples of the length of the overlap allowance in the front body 2 include a range of 15 mm or more. Furthermore, it is preferable that it is 30 mm or more.

  Moreover, as shown in FIG.25 and FIG.26, the disposable diaper 1D in 4th Embodiment is a thread-like elastic member or expansion-contraction in the boundary part vicinity including the joining or locking position of the front body 2 and the back body 3. A belt-like elastic member such as a conductive nonwoven fabric or a stretchable film is disposed, and an elastic boundary region 56 is provided. As a result, in the waist region 23, the stress in the crotch direction and the crotch direction of the openable portion 5C is smaller than the stress in the other portions. In the vicinity of the leg opening 7, the thread-like elastic member or the belt-like elastic member such as a stretchable nonwoven fabric or stretchable film may or may not be disposed on the entire circumference or a part thereof. May be.

  As described above, the disposable diaper 1 </ b> D according to the fourth embodiment overlaps the chassis 13 </ b> C and the chassis 13 </ b> D in the front body 2, and provides the opening 5 </ b> D configured by the joining portion 21 and the non-joining portion 22. And by making the stress in the crotch direction and crotch direction part of the opening 5D smaller than the stress in the other parts, the length of the opening 5D in the mounted state can be kept close to the maximum length, Further, since the elastic boundary region 56 that is a part of the opening expansion / contraction region 53 is expanded by the elastic force, the opening of the opening 5D is expanded in the crotch direction, and it becomes easy to secure an opening of a predetermined size. In addition, even when the non-bonding portion 22 is weakly bonded to the above-described dot shape, since the bonding can be easily peeled off, similarly, it is possible to provide an opening 5D that can be opened as necessary. become.

  In addition, in the trunk periphery area 23, it is good also as a structure which uses the base material sheet which has a stretching property other than providing an elastic member.

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

[3.1] Disposable diaper main body [3.1.1] Top sheet The top 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 the some sheet-like member may adhere | attach and may be comprised.

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, such as a woven fabric, a nonwoven fabric, or a perforated plastic sheet. For example, a sheet-like 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 which has a basis weight from 15 g / m < ² > to 35 g / m < ² > mainly having 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.

[3.1.2] Absorber The absorber absorbs and retains discharged body fluid such as urine. Examples of the absorber 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.

[3.1.3] Chassis The chassis 13 constitutes the outer shape of the disposable diaper main body 10. The chassis 13 may be configured by a single sheet-like member, or may be configured by bonding a plurality of sheet-like members. In the first embodiment, the disposable diaper 1 includes a front body 2, a rear body 3, and a crotch portion 4 positioned between the front body 2 and the back body 3. Although the surface sheet 11, the absorber 12, and the back surface sheet 14 are arrange | positioned in the position, in this invention, it is not restricted to this. For example, the chassis 13 may have the front body 2 and the back body 3, and the crotch part 4 having the top sheet 11, the absorbent body 12, and the back sheet 14 may be joined to the chassis 13 independently. In this case, the back sheet 14 and the chassis in the crotch part 4 may be joined, or the back sheet 14 may have the role of the chassis 13.

The chassis 13 is, for example, breathable, and is preferably made of a material that does not damage the skin even when a load due to compression, twisting, friction, or the like is applied during wearing, and does not irritate the skin. A sheet-like material having air permeability such as a 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.

[3.1.4] Back Sheet As the back sheet 14, for example, a thermoplastic film mainly composed of polyethylene (PE), polypropylene (PP), etc., a breathable resin film, a nonwoven fabric such as spunbond or spunlace A material obtained by bonding a breathable resin film, a plurality of layers of SMS (spun bond / melt blow / spun bond), 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.

[3.1.5] 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.

[3.1.6] Adhesive The topsheet 11, the absorbent body 12, and the chassis 13 are joined together so that they are bonded together by 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. 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.

[3.2] Masking sheet [3.2.1] Base sheet As the base sheets 61 and 62, either a liquid-permeable sheet or a liquid-impermeable sheet can be used. In the case of using a liquid permeable sheet, for example, the liquid permeable sheet exemplified as the top sheet 11 can be used. The base material sheets 61 and 62 may be thin nonwoven fabrics, such as spunbond nonwoven fabrics, point bond nonwoven fabrics, spunlace nonwoven fabrics, and the like, and nonwoven fabrics having a basis weight of 10 g / m ² to 30 g / m ^2. Can be illustrated. This is because the non-woven fabric having a small thickness increases the smoothness of the stretched state of the belt-like portion.

  In the case of using a liquid-impermeable sheet, for example, the liquid-impermeable sheet exemplified as the back sheet 14 can be used. The liquid-impermeable sheet may be on the skin contact surface side or the non-skin contact surface side with respect to the elastic member.

[3.2.2] Elastic Member As the elastic member 63, 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.

[3.2.3] Adhesive When joining the base sheets 61 and 62 with the hot melt adhesive in joining the base sheets 61 and 62 and the elastic member 63 or joining the base sheets 61 and 62 to each other. In the method, a hot melt adhesive is applied by a coating method such as spiral coating, control seam coating, coater coating, curtain coater coating, summit gun coating, etc., and an elastic member 63 is laminated thereon, The base material sheets 61 and 62 are overlapped thereon and joined. In order to make it difficult for the elastic member 63 to come off from the base material sheets 61 and 62, the elastic member 63 may be applied in advance by a coating method such as slit coating or control seam coating. Moreover, 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. 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.

DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Front body 3 Rear body 4 Crotch part 5, 5C Openable part 5B, 5D Opening part 6 Masking sheet 7 Leg opening part 8 Joint part 9 Trunk opening part 11 Surface sheet 12 Absorber 13 Chassis 14 Back sheet

Claims (12)

A chassis having at least a front body and a back body, a liquid-permeable surface sheet disposed on at least a part of the chassis, and a liquid impermeable disposed on one side in the thickness direction of the surface sheet. A disposable diaper comprising a permeable back sheet and a liquid-retaining absorbent disposed between the top sheet and the back sheet,
In the front body, the predetermined part of the front body can be separated along a separation line that connects points separated from each other across a substantially central line that extends in the longitudinal direction of the disposable diaper and bisects the width direction. An opening capable of opening, or an opening capable of opening a predetermined part of the front body is formed,
Reinforcing members that prevent breakage at both ends are provided at both ends of the openable portion or the opening, and elastic members that can be expanded and contracted are provided near the both ends .
The disposable diaper can be formed into a pants shape having a trunk opening and a pair of leg openings by joining or locking the front body and the back body in a predetermined position in advance or at the time of wearing. And
In the opening stretchable region, which is a region connecting the substantially center part of the back body near the trunk opening in the pant shape and the vicinity of the openable part or the vicinity of the opening along the outer periphery in the pant shape, at least Part of it is stretchable or stretchable,
The opening stretchable region is a disposable diaper including an elastic opening region formed at a predetermined position on the crotch direction side in the pants shape of the opening or the openable portion of the front body .   The disposable diaper of Claim 1 by which the hole of a circle or an ellipse is arrange | positioned at the said both ends of the said opening possible part or the said opening part.   The disposable diaper according to claim 1, wherein notches are formed in the openable portion or both ends of the open portion in a direction different from a direction in which the openable portion or the opening extends. The chassis is composed of a plurality of sheets,
The disposable diaper according to any one of claims 1 to 3, wherein the reinforcing member is sandwiched and joined between sheets of the plurality of sheets. The absorber is substantially vertically long and is disposed at least in the front body,
The disposable diaper according to any one of claims 1 to 4, wherein the openable portion or the opening is formed at a position separated from one side extending in the width direction of the absorber in the front body. The disposable diaper according to any one of claims 1 to 5, wherein the opening expansion / contraction region is formed so that an expansion ratio at the time of expansion to at least 1.1 times can be expanded. The disposable diaper according to any one of claims 1 to 6, wherein the opening stretchable region includes an elastic back body region formed on all or part of the back body near the trunk opening in the back body. The said opening expansion-contraction area | region contains the elastic boundary area | region formed in all or one part of the boundary part vicinity containing the joining or the latching position of the said front body and the said back body in any one of Claims 1-6. The disposable diaper described. The disposable diaper according to any one of claims 1 to 8 , wherein an auxiliary sheet is provided in the front body at a position including the openable portion or the opening. The disposable diaper according to claim 9 , wherein the auxiliary sheet includes an elastic member in whole or in part. The disposable diaper according to claim 9 or 10 , wherein the absorbent body is disposed on all or part of the auxiliary sheet. The auxiliary sheet is joined to the openable portion on the skin contact surface side of the chassis or to the crotch direction side of the opening, and is arranged to extend from one to the other in the width direction of the front body. The disposable diaper according to any one of claims 9 to 11 .

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