JP6172908B2 - Open disposable diaper - Google Patents

Description

  The present invention relates to a disposable diaper, and more particularly to an open-type disposable diaper.

  Conventionally, an open-type disposable diaper having an absorption chassis and an elastic waist belt that fits around a wearer's waist is known. For example, Patent Literature 1 is connected to an absorption chassis having a liquid absorbing structure extending from the crotch region to the front and rear waist regions, an elastic waist panel extending from the rear side of the crotch region to the rear waist region, and both sides of the elastic waist panel. In addition, an open-type disposable diaper having a pair of elastic belt portions each having a fastener portion at least on one side is disclosed.

JP-A-2005-270359 (P2005-270359A)

  In the open-type disposable diaper disclosed in Patent Document 1, the two belt portions are folded inward so as to overlap each other, and the fastener portion of one belt portion is fastened to the outer surface of the other belt portion, whereby both elasticity A looped elastic waist belt is defined by the belt portion and the elastic waist panel. By connecting the fastener portion located on the inner surface of the front waist region to the receiving portion located on the outer surface of the elastic waist belt, it can be assembled into a pants form and the diaper can be worn even when the wearer is standing Easy to wear.

  However, in such a diaper, since the fastener portion located on the skin facing surface of the front waist region is fixed to the receiving portion located in the elastic region of the elastic waist belt, the receiving portion is deformed and the fastener portion is stably There is a possibility that the fastening force of the fastening means may be reduced without being fixed. Thus, when a fastening means cannot exhibit required fastening force, there exists a possibility that the front waist area of a diaper may slide down during a wearing operation or during wearing.

  Therefore, an object of the present invention is to improve the conventional technique, and can be easily attached to and detached from a standing wearer, and the front waist region is stable during and during the wearing operation. An object of the present invention is to provide an open-type disposable diaper that can be fastened.

  In order to solve the above problems, the present invention has a longitudinal direction and a lateral direction, a skin facing surface and a non-skin facing surface, a front waist region, a rear waist region, and a crotch region located between the front and back waist regions. An absorption chassis having a front end portion located in the front waist region and a rear end portion located in the rear waist region, wherein the liquid absorbing structure extending in the longitudinal direction is disposed at least in the crotch region; The present invention relates to an open-type disposable diaper including an elastic waist belt connected to a rear end portion.

The open-type disposable diaper according to the present invention includes a first fastening means for connecting both side edges of the elastic waist belt to each other, and the non-skin of the elastic waist belt connected via the first fastening means. and a second fastening means for fastening wear the front end portion of the absorbent chassis on the opposite surface, the elastic waist belt extends from both side edges of the rear portion of the absorbent chassis to the outside of the lateral pair And at least one of the belt portions extends from the side edge of the liquid-absorbing structure outward in the lateral direction, and A second elastic region spaced apart from the first elastic region in the lateral direction; and a non-elastic region positioned between the first and second elastic regions, wherein the second fastening means includes the absorbing shear. A first fastener part located on the skin-facing surface side of the front end portion of the is composed of a second fastener part located on the non-skin facing side of the inelastic regions, the absorbent chassis A cover sheet that forms an outer surface of the cover sheet, the cover sheet having a main body portion on which the liquid absorbing structure is disposed, and both side portions that are located on both sides of the main body portion and bent inward. The both side portions are a pair of front and rear fixed end portions fixed to the main body portion, a fixed side portion positioned between the front and rear fixed end portions, and a pair of extendable and contractible in the vertical direction on both sides of the liquid absorption structure. A plurality of cuff elastic bodies extending linearly in the longitudinal direction are arranged on the pair of barrier cuffs, and have a concavely curved shape outward in the lateral direction among the fixed side portions. In the portion, a plurality of leg elastic bodies are arranged, and the cuff elasticity And the leg elastic body are closest to each other on the front waist region side of the crotch region, and in the rear waist region, the both side portions of the absorption chassis overlap with the elastic region, The absorption chassis includes a connection panel that extends in the lateral direction along the front end edge of the front waist region and is arranged to connect the front end portions of the pair of barrier cuffs, and the connection panel includes the skin facing surface. An inner surface sheet positioned on the side, an outer surface sheet positioned on the non-skin facing surface side, an elastic body attached to be stretchable between them, a front central elastic region in which the elastic body is disposed, and And inelastic both side portions located on both sides in the lateral direction of the front center elastic region, and the first fastening portion is disposed on both side portions of the connection panel .

  According to the open-type disposable diaper according to the present invention, the elastic waist belt expands and contracts, so that the diaper does not slide down or fall during the wearing operation or wearing. In addition, since the second receiving portion (second fixing portion) constituting the second fastening means is located in the non-elastic region of the elastic waist belt, the flatness is maintained, and the second receiving portion is in the elastic region. The front end portion of the absorption chassis can be stably connected to the elastic waist belt without being deformed by the expansion and contraction and the fastening force of the second fastening means being reduced.

The perspective view which shows the wearing condition of the open-type disposable diaper in 1st Embodiment of this invention. The expansion | deployment top view which cancelled | released the 1st and 2nd fastening means and expand | deployed the diaper and was seen from the skin opposing surface. The exploded perspective view of a diaper. The figure which looked at the elastic waist belt from the back in the deployment state of a diaper. The figure which shows the mode of the state to which the 1st fastening means when wearing a diaper was connected. The figure which shows a mode when connecting the 2nd fastening means when wearing a diaper. The expansion | deployment top view of the diaper in 2nd Embodiment. The expansion | deployment top view which showed only the elastic waist belt of the diaper in 2nd Embodiment with the continuous line. The figure similar to FIG. 4 in 3rd Embodiment. The expansion | deployment top view of the diaper in 4th Embodiment. The partially broken top view of the liquid absorption layer in 4th Embodiment. The partially broken plan view of the liquid absorption structure in 5th Embodiment The partially broken top view of the liquid absorption structure in 6th Embodiment.

<First Embodiment>
Referring to FIGS. 1 to 3, an open-type disposable diaper 10 according to this embodiment has a vertical direction Y, a horizontal direction X orthogonal thereto, a vertical axis P, and a horizontal axis Q. The diaper 10 includes an absorbent chassis 15 having a skin facing surface and a non-skin facing surface, a front waist region 11, a rear waist region 12, and a liquid absorbing structure 14 attached to at least the skin facing surface of the crotch region 13. The rear waist region 12 includes an elastic waist belt 16 that intersects the absorption chassis 15 and extends in the lateral direction X. When the diaper 10 is worn, both side edges of the elastic waist belt 16 are connected to each other via the first fastening means 17, and the front end portion 51 of the absorbent chassis 15 that defines the front waist region 11 is the second fastening means 18. The waist opening 19 and a pair of leg openings are defined by being connected to the outer surface of the elastic waist belt 16 via the.

  Referring to FIG. 2, the elastic waist belt 16 extends linearly in the lateral direction X, and extends to the outside of the lateral direction X facing inner and outer end edges 16 a and 16 b facing each other in the longitudinal direction Y and facing each other in the lateral direction X. An elastic panel 20 having a horizontally long rectangular shape defined by a convex side edge 16c and a side edge 16d extending straight in the longitudinal direction Y, the inner surface of which is connected to the absorption chassis 15; It has the latching flap 22 attached to the one side part of the panel 20, and the to-be-latched flap 24 attached to the other side part. The elastic waist belt 16 is divided into a central portion 25 connected to the absorption chassis 15 and a belt portion 26 extending outward in the lateral direction X from both side edges 15c and 15d of the rear end portion 52 of the absorption chassis 15 for convenience of explanation. Is done. A first fastener portion (third fastening portion) 27 is positioned on the skin facing surface of the locking flap 22, and the non-skin facing surface of the locked flap 24 is fastened so that the first fastener portion 27 can be engaged and disengaged. A first receiving portion (fourth fixing portion) 28 to be (fastened) is disposed. The first fastener portion 27 and the first receiving portion 28 constitute first fastening means 17 for connecting both side edges of the elastic waist belt 16 to each other.

  3 and 4, the elastic panel 20 has a first sheet 31 located on the skin facing surface side and a second sheet 32 located on the non-skin facing surface side. They are fixed to each other via a hot melt adhesive applied to either one of the facing surfaces. Between the first and second sheets 31 and 32, a plurality of waist elastic bodies 33 extending in the lateral direction X are arranged, and the elastic panel 20 is elasticized so as to be stretchable at least in the lateral direction X. The elastic panel 20 intersects the rear end portion 52 of the absorption chassis 15 and extends continuously from the side edges 15c and 15d to the outside in the lateral direction X, and both sides of the first elastic region 41. Side inelastic area (inelastic area) 40 and a second inelastic area 42 located between the side inelastic area 40 and both side edges 16c, 16d. Further, in the central portion of the first elastic region 41, the waist elastic body 33 is not disposed at a portion that intersects with the rear end portion 52 of the liquid absorbing structure 14 in the absorption chassis 15, and the central inelastic region 43. Is defined. A waist elastic body 33 is disposed outside the central inelastic region 43 in the longitudinal direction Y, and a rear central elastic region 44 is formed.

  In the present embodiment, in both belt portions 26, the first elastic region 41 and the second elastic region 42 are spaced apart from each other in the lateral direction X, and the side inelastic region 40 is located between them. As long as the effect is achieved, at least one belt portion 26 has such a configuration, and the side inelastic region 40 may not be formed on the other belt portion 26. Also, unlike the present embodiment, the waist elastic body 33 forming the central inelastic region 43 is cut or removed, and the first and second sheets 31 and 32 are separated from the first and second sheets 31 and 32 at the portion and the waist elastic body 33. The rear central elastic region 44 can be formed by disposing a separate elastic body. In this case, by adjusting the thickness of the elastic body to be arranged, the expansion ratio, etc., the elongation stress due to the rear central elastic region 44 is made higher than that of the first and second elastic regions 41, 42, and the elastic waist The belt can also be fitted to the wearer's back.

  The first and second elastic regions 41 and 42 may be formed by arranging a stretchable sheet between the first and second sheets 31 and 32 in addition to arranging a string-like or strand-like elastic body. The entire elastic panel 20 may be formed from an elastic sheet. In the present invention, the “non-elastic region” is a region where the elastic force of the waist elastic body 33 made of a string-like, strand-like or sheet-like elastic material is not expressed, and the waist elastic body 33 is substantially elastic. This means a region where the portion (extractable functional portion) is not provided. Therefore, in the non-elastic region, the portion of the snapback (the non-fixed portion of the elastic member that is not fixed to the sheet returns to the vicinity of the joining end portion that is fixed to the sheet by its contraction) extends. Even so, it can be said that the effect described later due to the formation of the inelastic region in the elastic panel 20 can be produced. Further, as a method for defining the non-stretchable region, in addition to the snapback, the waist elastic body 33 is fixed in the non-elastic region, and the elastic force is not expressed with the first and second sheets 31 and 32. Multiple cuts may be made.

The first and second sheets 31 and 32 can be formed from, for example, a liquid-impermeable SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric or a spunbond nonwoven fabric having a mass of about 10 to 20 g / m ² . The waist elastic body 33 is a plurality of strand-like or string-like elastic materials having a thickness of about 300 to 1200 dtex, an expansion ratio of about 1.5 to 3.5 times, and a separation dimension (pitch) of about 5 to 15 mm in the longitudinal direction Y. Can be formed from

The locking flap 22 has a substantially trapezoidal shape that protrudes outward in the lateral direction X, for example, two sheets 46 made of a non-stretchable fiber nonwoven fabric or plastic sheet having a mass of about 20 to 60 g / m ² . 47 are formed to overlap each other. The inner part of the sheet 46 forming the locking flap 22 is joined to the non-skin facing surface of the one side edge of the first sheet 31, and the inner part of the sheet 47 is the non-skin facing of the one side edge of the second sheet 32. The sheets 46 and 47 are joined to each other through a known joining means such as a hot melt adhesive or a heat welding means with the side edge of the elastic panel 20 interposed between the sheets 46 and 47. Be joined. The locking flap 22 is made of a sheet material having higher rigidity than the first and second sheets 31 and 32, and the locking flap 22 has higher rigidity than the elastic panel 20. Therefore, the flatness of the fastener portion 27 is ensured, and there is no possibility that the fastener portion 27 is deformed during the wearing operation and the fastening strength with the locked flap 24 is not lowered.

The latched flap 24 has a rectangular shape extending in the lateral direction X from the elastic panel 20, and is formed of, for example, two sheets formed from a non-stretchable fiber nonwoven fabric or plastic sheet having a mass of about 20 to 60 g / m ^2. 48, 49. The inner side of the sheet 48 forming the locked flap 24 is joined to the non-skin facing surface of the other side edge of the first sheet 31, and the inner side of the sheet 49 is the non-skin of the other side edge of the second sheet 32. The sheets 46 and 47 are bonded to the opposite surfaces and the side edges of the elastic panel are interposed between the sheets 48 and 49, and the sheets 46 and 47 are connected via a known bonding means such as a hot melt adhesive or a heat welding means. Be joined. The latched flap 24 is formed of a sheet material having a rigidity higher than that of the first and second sheets 31 and 32 similarly to the latching flap 22, and the latched flap 24 is higher than the elastic panel 20. It has rigidity. Therefore, since the flatness of the first receiving portion 28 located in the locked flap 24 is maintained, the first receiving portion 28 is deformed during the wearing operation, and the fastening area with the fastener portion 27 is reduced. Therefore, there is no fear that the fastening strength thereof is lowered.

  The absorption chassis 15 has front and rear end edges 15a and 15b that extend straight in the lateral direction X, and both side edges 15c and 15d that extend in the vertical direction Y between the front and rear end edges 15a and 15b and whose center part is bent inward. And a vertically long rectangular shape defined by. The absorption chassis 15 further includes a cover sheet 50 that forms its outer shape, a front end portion 51 that forms the front waist region 11, a rear end portion 52 that is positioned in the rear waist region 12, and the front and rear end portions 51 and 52. And an intermediate portion 53 that forms the crotch region 13. The cover sheet 50 is formed from a hardly liquid-permeable fiber nonwoven fabric sheet, a plastic film, or a laminate sheet thereof. The cover sheet 50 has a main body portion 56 on which the liquid absorbing structure 14 is disposed, and both side portions 57 located on both sides in the lateral direction X. The both side portions 57 are bent inwardly, 56 is fixed. Specifically, the both side portions 57 are bent between the front and rear fixed end portions 60 and 61 fixed to the main body portion 56 via the joining region 58 to which the hot melt adhesive is applied, and the front and rear fixed end portions 60 and 61. And a fixed side portion 63 extending in the vertical direction Y along the side portions (both side edges 15c and 15d of the absorption chassis 15). The fixed side portions 63 of the both side portions 57 are cut in a concave shape outward in the lateral direction X at the center portion, and a plurality of strings are formed along the concave curved side edges (leg opening edge portions) 15c and 15d. -Like or strand-like leg elastic bodies 62 are arranged to be extendable and contractible. Accordingly, the dimension in the lateral direction X between the outer edges of the fixed side portion 63 is smaller than when the fixed side portion 63 is not cut, and the fixed side portion 63 is passed when the wearer passes the leg through the leg opening. Can be prevented, and the fit to the thigh can be improved. In addition, since the leg elastic body 62 is not cut together with the fixed side portion 63, the cut portion of the leg elastic body 62 touches the wearer's thigh and gives a stimulus, or a part of the leg elastic body 62 comes out to the outside. It is not. In addition, the leg elastic body 62 may be disposed in the entire crotch region 13 as a shape in which such a cut line is curved larger and gently.

  Further, both side portions 57 have sleeve-like distal edges formed by folding back inner edges thereof, and a plurality of string-like shapes extending straight in the longitudinal direction Y are included in the distal edges. Alternatively, the strand-like cuff elastic body 64 is fixed so as to be stretchable. When the diaper 10 is worn, the distal edge is separated from the skin-facing surface of the main body 56 by the contracting action of the cuff elastic body 64, and a pair of barrier cuffs for preventing side leakage of excrement are formed. The leg elastic body 62 and the cuff elastic body 64 can be formed from, for example, an elastic material having a thickness of 470 to 940 dtex and an expansion ratio of about 1.5 to 2.8 times.

  By arranging the leg elastic body 62, the leg opening edge fits to the wearer's thigh and the barrier cuff fits to the groin by the cuff elastic body 64, thereby ensuring the side leakage of excrement. Can be prevented. Further, when the diaper 10 is pulled up / down in the form of a pant, there is no possibility that the leg opening edge is bent or twisted due to distortion.

  The liquid absorbing structure 14 is fixed to the skin-facing surface of the main portion 56 of the cover sheet 50 through a hot melt adhesive, and includes at least a liquid absorbing layer 65 and a liquid absorbing layer formed from the liquid permeable sheet. A body side liner 66 covering the skin facing surface side. The absorbent layer 65 is an absorbent formed from a mixture that is water-insoluble and has a water absorption capacity of 10 times or more of its own mass, so-called super absorbent polymer particles (SAP), wood fluff pulp, and optionally a slight amount of thermoplastic fibers. It is formed by encapsulating a conductive core with a liquid-permeable sheet such as a hydrophilic SMS nonwoven fabric. On the lower surface of the liquid-absorbing structure 14, a leak-proof sheet 67 formed from a liquid-impervious sheet larger than the outer dimension thereof is disposed.

  The absorption chassis 15 has a connection panel 68 that extends in the lateral direction X along the front end edge 11a in the front waist region 11 and is disposed so as to slap the front end portions of the barrier cuff. The connection panel 68 includes an inner surface sheet 70 positioned on the skin facing surface side, an outer surface sheet 71 positioned on the non-skin facing surface side, and an elastic body 72 attached in an extendable manner therebetween. The connection panel 68 includes a front central elastic region 73 in which the elastic body 72 is disposed, inelastic both side portions located on both sides of the front central elastic region 73 in the lateral direction X, and skin facing surface sides of both side portions. And a pair of second fastener portions (first fastening portions) 74 arranged.

  Referring to FIG. 4, the first receiving portion 28 to which the first fastener portion 27 of the locking flap 22 is detachably fixed is attached to the non-skin facing surface of the locked flap 24 of the elastic waist belt 16. 2nd receiving part (2nd fixing | fixed part) 75 which is located and the 2nd fastener part 74 of the connection panel 68 is detachably fixed to the non-skin opposing surface side of the side non-stretchable area 40, respectively. Is placed. The second fastener portion 74 and the second receiving portion 75 constitute second fastening means 18 for connecting the front end portion 51 of the absorption chassis 15 to the elastic waist belt 16.

  The first and second fastener portions 27 and 74 are formed of a sheet material having a relatively high rigidity and tensile strength, such as a plastic film, and have a hook group of mechanical fasteners. The first and second fastener portions 27 and 74 are replaced with a hook element group when the outer surfaces of the locked flap 24 and the belt portion 26 to which they are locked are formed of a plastic film. It can also be formed by applying an adhesive. In that case, in order to protect the fastener portion, the surface may be covered with a separator coated with silicon.

The first and second receiving portions 28 and 75 are formed on a base sheet made of a sheet material having relatively high rigidity and tensile strength, such as a plastic film, a fiber nonwoven fabric, and a laminate thereof, and a surface of the base sheet. Formed from the loop elements of the arranged mechanical fasteners. However, when the base sheet is formed of a fiber nonwoven fabric, it does not have to have a mechanical loop element, and when the first and second fastener portions 27 and 74 have hook elements, The sheet 49 that forms the outer surface of the locking flap 24 and the second sheet 32 that forms the outer surface of the belt portion 26 are formed from a fiber nonwoven fabric, and the first and second fastener portions 27 and 74 are fixed directly to the sheet. You can also wear it.
Although not shown in the present invention, the first and second fastening means 17 and 18 may be any one having a pair of male and female fastening elements that can be engaged with and disengaged from each other. The first and third fastening portions 27, 74 have mechanical fastener loop groups, and the first and second receiving portions (second and fourth fastening portions) 28, 75 have hook groups. Thus, the first and second fastening means 17 and 18 may be connected by engaging each other.

  Referring to FIG. 5, when wearing the diaper 10, first, in a state where the wearer is standing or lying down, the skin facing surface of the elastic waist belt 16 is applied to the back side, and the wearer himself or a wear assistant By grasping both belt portions 26 of the elastic waist belt 16 and pulling them around the waist from the wearer's back to the abdomen, the skin-facing surface of the locking portion 22 is engaged with the locked portion 24. The first fastener portion 27 is fastened to the second receiving portion 28 by overlapping each other so as to contact the non-skin facing surface. Next, as shown in FIG. 6, the front end portion (front waist region 11) 51 of the absorption chassis 15 is gripped and the front waist region 11 is pulled (forward or backward) from between the thighs. The skin facing surface 51 is bent toward the wearer's stomach side so as to come into contact with the elastic waist belt 16 attached so as to tighten around the wearer's waist. In such a state, the diaper 10 exhibits a pants-shaped configuration by fastening the second fastener portion 74 located on the skin facing surface side of the front end portion 51 to the second receiving portion 75 located facing the second fastener portion 74.

  Thus, in the case of the open-type disposable diaper 10 according to the present invention, the elastic waist belt 16 is wound around the wearer's waist by fastening the first fastening means 17, and then the front end 51 of the absorbent chassis 15 is attached. Since it can attach to the outer surface of the belt part 26, even if a wearer is a standing position, wearing operation can be performed easily. In addition, for example, when the wearer excretes in the toilet seat, the diaper 10 having a pants form can be pulled down to the feet together with clothes such as trousers as it is, and after excretion, the diaper 10 rises from the state of sitting on the toilet seat Since the diaper 10 in the state of being pulled down at the foot can be pulled up with the clothes and worn, the excretion operation can be performed smoothly. In particular, when the wearer is an elderly person, unlike a pants-type diaper, the wearer can perform the wearing operation in a standing / recumbent state without passing a leg through the leg opening. Since the diaper 10 can be raised and lowered together with the clothes in the form of pants, it is possible to encourage the elderly to excrete by themselves. In other words, an elderly person who can stand up by himself / herself is freed from the trouble of removing the diaper 10 at the time of excretion, so that he / she can excrete alone in the toilet at night without the assistance of a wear assistant or assistant. Can go out without worrying about excretion during the day, and can live more daily activities. In addition, in the case of an elderly person who can stand up by receiving assistance, the wear assistant can raise and lower the diaper 10 together with clothes such as pants during excretion, so it is usually removed from the body during excretion. Compared to an open diaper, the time for which the pubic part is exposed is shortened, and the embarrassment due to the exposure of the genital part is reduced.

  Referring to FIG. 4, in each belt portion 26, the dimension in the lateral direction X of the elastic region is about 50% or more with respect to the dimension L in the lateral direction X, and preferably the lateral direction of the first elastic region 41. The dimension in X is preferably about 30 to 80% with respect to the dimension L, and the dimension in the transverse direction X of the second elastic region 42 is preferably about 5 to 55% with respect to the dimension L. When the dimensional ratio of the elastic region to the dimension L in the lateral direction X of each belt portion 26 is 50% or more, as shown in FIG. 5, the elastic waist belt 16 is wound around the belt in a standing state on the wearer. Since the waist opening edge portion can be extended and expanded, the diaper 10 can be easily lifted / lowered during excretion.

  While a sufficiently large elastic region is formed in the elastic waist belt 16, the fastening force of the second fastening means 18 is provided by providing the side inelastic region 40 between the first and second elastic regions 41 and 42. Is prevented. That is, in order for the second fastener portion 74 to be stably fixed at the second receiving portion 75, the area where the hook element of the second fastener portion 74 and the loop element of the second receiving portion 75 engage with each other. When the second receiving portion 75 itself needs to maintain flatness to such an extent that it can be sufficiently secured, the second receiving portion 75 is positioned in the first or second elastic region 41, 42 and its expansion and contraction is achieved. In the case where the surface is uneven and the surface is uneven, the loop element is not engaged with the hook element in the recess, and the fastening strength between the second fastener portion 74 and the second receiving portion 75 may be reduced. There is. In the present embodiment, since the second receiving portion 75 is positioned in the side inelastic region 40, the second receiving portion 75 is not deformed by the contraction of the first and second elastic regions 41, 42, and the plane Therefore, the second fastening means 18 can exhibit a required fastening force.

  Further, in a general (mechanical) fastening means, the area of the target region (receiving portion) is formed larger than that of the hook material (fastener portion). With reference to FIG. The dimension W1 in the lateral direction X of the second fastener part 74 is larger than the dimension W2 in the lateral direction X of the second receiving part 75. Therefore, when the second fastener portion 74 is fixed to the second receiving portion 75, a part of the second fastener portion 74 does not overlap with the second receiving portion 75. Sufficient fastening strength that can raise / lower the diaper 10 can be exhibited. Thus, by setting the size of the second receiving portion 75 to a necessary and sufficient size while sufficiently securing the range of the elastic region in the elastic waist belt 16, the excellent operability and sufficient of the diaper 10 are obtained. It is possible to achieve both good fastening strength.

  Moreover, when the front center elastic region 73 is located in the front waist region 11, the wearer / wearing assistant grips both sides of the front waist region 11 with both hands when the diaper 10 is worn, While extending the front central elastic region 73 in the lateral direction X so as not to wrinkle, the front end of the absorption chassis 15 is overlapped with the non-skin facing surface of the elastic waist belt 16 to interlock with the expansion and contraction of the elastic waist belt 16 Thus, the front waist region 11 can be expanded and contracted, and a virtual elastic band is formed around the entire waist of the wearer. Thereby, since the front waist region 11 is expanded and contracted in accordance with the movement of the wearer's body, wrinkles that impair the appearance of the surface of the front waist region 11 occur, or between the front waist region 11 and the wearer's body. There are no gaps between them that cause excrement leakage.

Second Embodiment
Referring to FIGS. 7 and 8, the elastic waist belt 16 according to the present embodiment has a shape in which a central portion thereof is convex toward the horizontal axis Q, and covers the wearer's buttocks in a worn state. 80.

  The buttocks cover portion 80 includes first and second sheets 31 and 32, a buttocks elastic body 81 formed of a plurality of string-like or strand-like elastic materials fixed to be stretchable therebetween, and buttocks elasticity And a buttocks elastic region 82 in which a body 81 is disposed. The collar elastic body 81 extends so as to obliquely intersect the vertical axis P on both sides of the liquid absorbing structure 14. The buttock cover portion 80 is elasticized by the buttock elastic body 81, so that it fits the wearer's buttock and can have an underwear-like appearance in a rear view. Further, the rear end portion 52 of the absorption chassis 15 and a part of the intermediate portion 53 on the rear waist region 12 side are joined via a joining region (not shown) in which a hot melt adhesive is applied to the buttock cover portion 80. The As a result, both side portions 57 of the absorption chassis 15 expand and contract in conjunction with the buttock cover portion 80, so that the entire absorption chassis 15 is pulled up backward in the wearing state of the diaper 10, and more in accordance with the movement of the wearer's body. Can be fitted.

  Referring to FIG. 8, the buttocks elastic body 81 is not disposed at the center portion of the buttocks cover portion 80, and the rear center elastic region 44, the first elastic region 41, and the buttocks portion are disposed at the center of the elastic waist belt 16. A central inelastic region 85 surrounded by the elastic region 82 is located. By forming the central inelastic region 85, the contraction of the waist elastic body 33 and the buttocks elastic body 81 does not directly act on the rear end portion of the liquid absorbing structure 14 that intersects the elastic waist belt 16. There is no possibility that the rear end portion is deformed or wrinkles are formed and the absorption performance is deteriorated. In addition to the present embodiment, without using the buttocks elastic body 81, a part of the waist elastic body 33 is extended inward so as to incline with respect to the vertical axis P, thereby providing elasticity to the buttocks cover portion 80. You may provide, and the collar part cover part 80 may form the center part 25 and the belt part 26 from a separate panel.

<Third Embodiment>
Referring to FIG. 9, in the diaper 10 according to the present embodiment, the base sheet that forms the first and second receiving portions 28 and 75 located on the non-skin facing surface side of the elastic waist belt 16 and the base sheet are fixed. Between the second sheet 32, an illustration sheet 88 with a plurality of decorative elements 87 visible from the outside is arranged. The portions where the first and second receiving portions 28 and 75 are disposed are inelastic regions and are different from the first and second elastic regions 41 and 42 in the touch and the like, but the wearer of the diaper 10 In particular, it is impossible to grasp the position and size of the second receiving portion 75 located between the first elastic region 41 and the second elastic region 42 by using a wear assistant. Like this embodiment, by arranging the illustration sheet 88 visible from the outside on the inner surface of the base sheet forming the first and second receiving portions 28 and 75, the first and second fastener portions 27, Since the position and range of the target 74 to be fastened can be easily visually confirmed, the wearing operation can be easily performed, and the appearance is also preferable. The illustration sheet 88 can be formed from a fiber non-woven sheet or a plastic sheet. As the decorative element 87, in addition to various known patterns, for example, coloring other than white (coloring), characters, trademarks, product quality indications and sizes, etc. Display or the like can be used.

<Fourth embodiment>
Referring to FIGS. 10 and 11, in the present embodiment, the liquid absorption layer 65 of the liquid absorption structure 14 includes an absorbent core formed mainly from superabsorbent polymer particles and a mass located on the skin facing surface side. About 8.0 to 15.0 g / m ² , preferably, a first sheet 91 formed from a liquid-permeable non-woven fabric having a mass of about 10.0 g / m ² , and a mass of about 1 located on the non-skin facing surface side 8.0 to 15.0 g / m ² , preferably 11.0 g / m ² of a liquid nonwoven fabric such as a liquid-permeable or hardly liquid-permeable SMS fiber nonwoven fabric, or a liquid-impervious plastic film. A second sheet 92.

  The liquid absorption layer 65 is further provided with a liquid absorption area 93 defined in a substantially rectangular shape with a given dimension in the longitudinal direction Y, in which the absorbent core is disposed, and the absorbent core is substantially not disposed. And a non-liquid absorbing area (seal part) 94 formed so as to surround the liquid absorbing area. In addition, in this embodiment, although the liquid absorption area 93 is divided into 10 areas, the area and the number of areas can be appropriately changed according to the absorption performance required for the liquid absorption structure 14, for example, It may be divided into 10 or more areas, or may be formed of only one area extending over the entire liquid absorbing structure 15.

In the liquid absorbing region 93, on the inner surface of the first sheet 91, the mass about 30~300g / ^{m 2} by means of hot melt adhesive 96, preferably, the mass about 40~280g / ^{m 2} of superabsorbent polymer particles 95 Is fixed almost uniformly. In order to adjust the absorption rate of the entire liquid absorbing layer 65, for example, two types of different absorption rates can be used in combination with the superabsorbent polymer particles 95. In addition, as long as the effects of the present invention described later are exerted, the absorbent core includes not only the superabsorbent polymer particles 95 but also known materials such as fluff pulp and optional thermoplastic fibers at a relatively low mixing ratio. It may be included in part. Specifically, when water-absorbing fibers such as fluff pulp are mixed, it is preferably mixed at a ratio of about 0 to 30% by mass with respect to the entire absorbent core. Various known materials can be used for the hot melt adhesive 96, but it has hydrophobicity after absorption of body fluid so that the absorbent polymer particles do not peel from the first sheet 91. It is preferable to use an adhesive.

  As described above, the absorbent core of the liquid absorbing layer 65 is formed only from the absorbent polymer particles 95 and the sheet member that encloses the absorbent polymer particles 95. Therefore, the liquid absorbent structure 15 has the absorbent core having the absorbent polymer particles. It becomes thinner than the case where it is formed from a mixture of 95 and fluff pulp. Therefore, even if the wearer is bent forward while the diaper 10 is worn, the front waist region 11 is not stiff and deforms flexibly according to the movement of the wearer's body, so that the wear feeling is excellent.

<Fifth Embodiment>
Referring to FIG. 12, in this embodiment, the leg elastic body 62 is cut together with the fixed side portion 63. Also in this aspect, as in the first embodiment, the dimension of the lateral direction X between the outer edges of the fixed side portion 63 is reduced because the fixed side portion 63 is cut into a concave shape, and thus the wear is performed. When a person passes a leg through the leg opening, the fixed side portion 63 can be prevented from being caught, and the fit to the thigh can be improved.

<Sixth Embodiment>
Referring to FIG. 13, in the present embodiment, the joint area 58 in the fixed side portion 63 has a concave shape outward in the lateral direction X, and the non-fixed area is between the side edge 15 c and the joint area 58. 98 is formed. In the first and fifth embodiments, a part of both side portions 57 is cut, and even if it is cut into a curved shape in consideration of skin contact, it is the wearer. There is a risk of irritation by directly touching the inside of the thigh. In the case of the present embodiment, the relatively high rigidity portion where the joining area 58 is located does not directly touch the skin, so that the skin contact can be further improved.

  In addition to the materials described in this specification, various known materials that are usually used in this type of article can be used without limitation for the respective members constituting the diaper 10. In addition, in the specification and claims of the present invention, the terms “first”, “second”, “third” and “fourth” are used to simply distinguish similar elements and positions. It has been.

The disclosure relating to the present invention described above can be summarized in at least the following matters.
Having a longitudinal direction and a transverse direction, a skin-facing side and a non-skin-facing surface, a front waist region, a rear waist region, a crotch region extending between said front and rear waist regions, to the longitudinal direction at least the crotch region An absorbent chassis having a front end portion located in the front waist region and a rear end portion located in the rear waist region, and an elastic waist belt connected to the rear end portion of the absorbent chassis, in which an extending liquid absorbing structure is disposed In an open-type disposable diaper including: first fastening means for connecting both side edges of the elastic waist belt to each other; and the non-skin facing of the elastic waist belt connected via the first fastening means and a second fastening means for fastening wear the front end of the absorbent chassis to the surface, the elastic waist belt, the said absorbent chassis A pair of belt portions extending outward in the lateral direction from both side edges of the end portion, and an elastic region capable of expanding and contracting in the lateral direction, wherein at least one of the belt portions extends from a side edge of the liquid absorbing structure. A first elastic region extending outward in the lateral direction; a second elastic region spaced apart from the first elastic region in the lateral direction; and an inelastic region located between the first and second elastic regions. and said second fastening means includes a first fastening unit located at the skin-facing surface side of the front end portion of the absorbent chassis, the second fastening is located in the non-skin facing side of the inelastic regions The absorbent chassis has a cover sheet that forms an outer surface thereof, and the cover sheet is located on both sides of the main body and the main body on which the liquid absorption structure is disposed, Both side parts bent inward, and the both side parts are the main parts. And a pair of barrier cuffs that can extend and contract in the vertical direction on both sides of the liquid absorption structure. The barrier cuff is provided with a plurality of cuff elastic bodies extending linearly in the longitudinal direction, and a plurality of leg portions are formed in a portion of the fixed side portion having a concave curvature outward in the lateral direction. An elastic body is disposed, and the cuff elastic body and the leg elastic body are closest to each other on the front waist region side of the crotch region, and in the rear waist region, the both sides of the absorption chassis And the absorption chassis extends in the lateral direction along the front edge of the front waist region and is connected to the front panel of the pair of barrier cuffs. Possess The connection panel includes an inner sheet positioned on the skin facing surface side, an outer sheet positioned on the non-skin facing surface side, an elastic body attached in an extendable manner therebetween, and the elastic body. A front central elastic region and inelastic both side portions located on both sides in the lateral direction of the front central elastic region, and the first fastening portion is disposed on both side portions of the connection panel. The

The above invention can include at least the following embodiments.
(1) The lateral dimension of the elastic region of each belt part is about 50% or more of the lateral dimension of each belt part.
( 2 ) The leg elastic body is disposed in a portion of the absorption chassis located outside the liquid absorption structure in the lateral direction so as to be extendable and contractable along a leg opening edge.
( 3 ) The elastic waist belt includes an elastic panel in which the elastic region is disposed, an inelastic locking flap attached to one side of the elastic panel, and a locked flap attached to the other side. has the door, the first fastening means includes a third fastener part located on the skin-facing side of the locking flap, the fourth stop is located in the non-skin facing side of the object to be locked flap It consists of a landing part.
(4) The elastic waist belt has a central portion said absorbent chassis located between the pair of belt portions is connected, the non-elastic portion overlapping the liquid-absorbent structure of the central portion The area is located.
(5) The elastic waist belt, a shape which is convex toward the horizontal axis of the diaper, in the rear waist region side of said crotch region, said the side edges intersecting with said liquid-absorbent structure An elastic collar cover portion extending outward in the lateral direction is provided.
( 6 ) In the said receiving part which comprises the said 1st and 2nd fastening means, the sheet | seat which has a visually visible decoration element is arrange | positioned.
( 7 ) The liquid-absorbing structure includes a liquid-permeable body-side liner and a liquid-absorbing layer, and the liquid-absorbing layer includes a liquid-permeable first sheet and a liquid-permeable or liquid-impermeable sheet. Second sheet and absorbent polymer particles interposed between the sheets.
(8) The liquid-absorbent layer includes a non-liquid absorbing region and said first sheet and said second sheet are joined together, surrounded by the non-liquid absorbing region, the absorbent polymer particles are encapsulated And a plurality of liquid absorption areas.
( 9 ) The joining area that fixes the fixed side part and the main body part has a concave shape outward in the lateral direction, and a non-fixing area is located between the joining area and the outer edge of the absorption chassis. To do.

DESCRIPTION OF SYMBOLS 10 Diaper 11 Front waist area 12 Rear waist area 13 Crotch area 14 Liquid absorption structure 15 Absorption chassis 15c, 15d Absorption chassis side edge 16 Elastic waist belt 17 First fastening means 18 Second fastening means 22 Locking flap 24 Engagement Stop flap 25 Central portion 26 of elastic waist belt Belt portion 27 First fastener portion (third fastening portion)
28 First receiving part (fourth fastening part)
40 Inelastic region 41 First elastic region 42 Second elastic region 43 Central inelastic region (inelastic region)
51 Absorbing Chassis Front End 52 Absorbing Chassis Rear End 53 Absorbing Chassis Middle Part 56 Main Body 57 Both Sides 60 Front Fixed End 61 Rear Fixed End 63 Fixed Side 62 Leg Elastic Body 65 Liquid Absorbing Layer 66 Body Side Liner 73 Front central elastic region 74 Second fastener portion (first fastening portion)
75 Second receiving part (second fastening part)
80 buttock cover 85 central inelastic region 87 decorative element 88 illustration sheet (sheet)
91 1st sheet 92 2nd sheet 93 Liquid absorption area 94 Non liquid absorption area 95 Absorbent polymer particle 98 Non-fixed area L Dimension Q in the transverse direction of elastic waist belt Horizontal axis X Horizontal direction Y Vertical direction

Claims (10)

Having a longitudinal direction and a transverse direction, a skin-facing side and a non-skin-facing surface, a front waist region, a rear waist region, a crotch region extending between said front and rear waist regions, to the longitudinal direction at least the crotch region An absorbent chassis having a front end portion located in the front waist region and a rear end portion located in the rear waist region, and an elastic waist connected to the rear end portion of the absorbent chassis, in which an extending liquid absorbing structure is disposed In an open-type disposable diaper including a belt,
First fastening means for connecting both side edges of the elastic waist belt to each other, and the front end portion of the absorbent chassis on the non-skin facing surface of the elastic waist belt connected through the first fastening means. Second fastening means for fastening,
The elastic waist belt has a pair of belt portions from both side edges of the rear portion of the absorbent chassis extend outwardly of the lateral direction and a stretchable elastic region in the transverse direction,
At least one of the belt portions includes a first elastic region extending outward in the lateral direction from a side edge of the liquid-absorbing structure, a second elastic region spaced apart and opposed to the first elastic region in the lateral direction, An inelastic region located between the first and second elastic regions,
Said second fastening means includes a first fastening unit located at the skin-facing surface side of the front end portion of said absorbent chassis, and a second fastener part located on the non-skin facing side of the inelastic regions Consists of
The absorption chassis includes a cover sheet that forms an outer surface thereof, and the cover sheet is disposed on both sides of the main body portion and on both sides of the main body portion, and is bent inward. And
The both side portions include a front and rear fixed end portion fixed to the main body portion, a fixed side portion positioned between the front and rear fixed end portions, and a pair of barrier cuffs that can extend and contract in the vertical direction on both sides of the liquid absorption structure. And
The pair of barrier cuffs are arranged with a plurality of cuff elastic bodies extending linearly in the longitudinal direction,
A plurality of leg elastic bodies are arranged in a portion having a concave curved shape outward in the lateral direction in the fixed side portion,
The cuff elastic body and the leg elastic body are closest to each other on the front waist region side of the crotch region,
In the rear waist region, the both side portions of the absorption chassis overlap each other with the elastic region,
The absorbent chassis has a connection panel that extends in the lateral direction along the front edge of the front waist region and is arranged to connect the front ends of the pair of barrier cuffs,
The connection panel includes an inner sheet positioned on the skin facing surface side, an outer sheet positioned on the non-skin facing surface side, an elastic body attached in an extendable manner therebetween, and the elastic body disposed A front center elastic region and inelastic both side portions located on both sides in the lateral direction of the front center elastic region, and the first fastening portion is disposed on the both side portions of the connection panel. Mutsu you you, characterized in that. 2. The diaper according to claim 1, wherein a dimension in the lateral direction of the elastic region of each belt part is 50% or more of a dimension in the lateral direction of each belt part. 3. The leg elastic body is disposed in a portion of the absorption chassis located outside the liquid absorption structure in the lateral direction so as to be extendable and contractable along a leg opening edge. Diapers. The elastic waist belt has an elastic panel in which the elastic region is disposed, an inelastic locking flap attached to one side of the elastic panel, and a locked flap attached to the other side. and, wherein the first fastening means includes a third fastener part located on the skin-facing side of the locking flap, and a fourth fastener part located on the non-skin facing side of the object to be locked flap The diaper in any one of Claims 1-3 comprised from these. The elastic waist belt has a central portion said absorbent chassis located between the pair of belt portions is connected, the non-elastic region is located at a site overlapping with the absorbent structure of the central portion The diaper according to any one of claims 1 to 4 . The elastic waist belt, a shape which is convex toward the horizontal axis of the diaper, in the rear waist region side of said crotch region, said lateral outer side of the side edge intersects with the liquid-absorbent structure The diaper in any one of Claims 1-5 which has an elastic collar part cover part extended in. The diaper in any one of Claims 1-6 by which the sheet | seat which has a visually visible decoration element is arrange | positioned in the said receiving part which comprises the said 1st and 2nd fastening means. The liquid-absorbing structure includes a liquid-permeable body-side liner and a liquid-absorbing layer, and the liquid-absorbing layer includes a liquid-permeable first sheet and a liquid-permeable or liquid-impermeable sheet second. The diaper in any one of Claims 1-7 which has a sheet | seat and the absorptive polymer particle interposed between those sheets. The liquid-absorbent layer, said a non-liquid absorbing zone in which the first sheet and said second sheet are joined together, the non-liquid absorbing surrounded by regions, a plurality of suction of the absorbent polymer particles are encapsulated The diaper according to claim 8 , further comprising a liquid region. The joint area for fixing the fixed side part and the main body part has a concave shape outward in the lateral direction, and a non-fixed area is located between the joint area and the outer edge of the absorption chassis. The diaper in any one of 1-9 .

Images