JP6662634B2 - Disposable wearing articles - Google Patents

Description

  The present invention relates to disposable wearing articles.

  Conventionally, in the vertical and horizontal directions, having a skin contact surface and a non-skin contact surface on the opposite side, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions. Disposable wearing articles (diapers) including a liquid absorbing structure extending from the crotch region to the front and rear waist regions are known. For example, the front and rear waist regions of the diaper disclosed in Patent Document 1 have a first elastic region extending in the waist direction along the waist opening edge and a second elastic region extending in the waist direction adjacent to the first elastic region. The telescopic region is divided into a third telescopic region extending in the waist direction adjacent to the second telescopic region, and the relation between the telescopic forces of these telescopic regions is expressed as: third telescopic region ≧ second telescopic region> first telescopic region. Is disclosed.

  In this diaper, the first elastic force of the waist opening edge side located at the upper end in the vertical direction is small, so that the waist opening can be easily widened, while the third elastic force of the leg opening edge side is large. As a result, the diaper can be fitted to the wearer's body at the leg opening edge.

Patent No. 4352003 (P4352003B)

  However, among diaper wearers, there are also newborn babies and delicate human skin, which may cause skin troubles such as reddening of the skin where the elastic waist is applied. For this reason, a diaper having a low contraction portion and a high contraction portion in the lateral direction has been desired.

  Therefore, an object of the present invention is to improve a conventional technique, and to provide a wearing article which does not cause skin trouble.

In order to achieve the above object, the present invention has a longitudinal direction and a lateral direction, a skin contact surface and a non-skin contact surface on the opposite side, a front waist region, a rear waist region, and the front and rear regions. a crotch region extending between the waist regions, viewed contains a liquid-absorbent structure extending in the front and rear waist regions from the crotch region, at least one of the waist regions of said front and rear waist regions is of the liquid-absorbent structure A pair of first side elastic regions located between both side edges and both side edges of the one waist region, and at least one waist elastic body extending in the lateral direction in the first side elastic region; The waist elastic body of the present invention relates to a disposable wearing article having a low elastic portion having a cut portion and a high elastic portion having no cut portion in the lateral direction .

In the first aspect of the disposable wearing article according to the present invention, the high elasticity portion of the waist elastic body is a portion having a large cross-sectional area, and the low elasticity portion of the waist elastic body is the cross section of the high elasticity portion. It is a portion having a smaller sectional area than an area .
The second invention of the disposable wearing article according to the present invention is such that the liquid-absorbing structure has a core material and a side flap located outside the core material in the lateral direction, and the one waist region includes: A second side elastic region between the first side elastic region and both side edges of the core material, the second side elastic region overlapping the side flap in a plan view, and located at the second side elastic region in the waist elastic body; The contraction force of the portion to be stretched is larger than the contraction force of the low elasticity portion, and an inelastic region where the waist elastic body does not exist is arranged inside the pair of second side elastic regions. The core material and the inelastic region overlap with each other.
A third invention of the disposable wearing article according to the present invention is characterized in that the low elastic portion of the waist elastic body has a cut portion extending in the lateral direction between both side edges of the waist elastic body in the longitudinal direction. And

  The front and rear waist region has a plurality of the waist elastic bodies in the longitudinal direction, and the waist elastic body located on the lower side in the longitudinal direction than the liquid absorbing structure has the low elastic portion, The waist elastic body located above the liquid absorbing structure in the vertical direction does not have the low elastic portion. Therefore, on the lower side in the vertical direction than the liquid-absorbing structure, the wearing article can be fitted around the waist of the wearer while preventing the elastic waist from strongly hitting around the leg of the wearer. On the upper side in the vertical direction than the liquid structure, it is possible to suppress the wearing article from shifting downward.

  The wearing article has a waist opening and a pair of leg openings, and the front and rear waist regions have a plurality of the waist elastics in the longitudinal direction, and the waist elastics located on the leg opening side. The position of the cut point is different from the position of the cut point of the waist elastic body adjacent to the waist elastic body on the waist opening side in the lateral direction. Therefore, it is possible to prevent the contraction force of the waist elastic body from locally increasing, and to prevent the part of the waist elastic body from strongly hitting around the wearer's leg while wearing it around the wearer's leg. The article can be fitted.

  According to the disposable wearing article according to the present invention, at least one waist elastic body has a low elastic portion having a cut portion and a high elastic portion having no cut portion in the lateral direction. Therefore, since the waist elastic body has the low elasticity portion, the wearing article can be fitted to the wearer's body with the high elasticity portion while preventing the waist elastic body from strongly hitting the wearer's body. Thereby, occurrence of skin troubles such as reddening of the skin can be prevented.

The drawings illustrate specific embodiments of the present invention according to the present disclosure, and include the essential and essential features of the invention as well as alternative and preferred embodiments.
The perspective view which looked at the disposable wearing article (diaper) which concerns on 1st Embodiment of this invention from the front. FIG. 4 is a partially exploded development view of the diaper in a state where each elastic body is extended in a vertical direction and a horizontal direction of the diaper. Partial enlarged view of the rear waist area. FIG. 4 is a partially enlarged view of FIG. 3. FIG. 5 is a partially enlarged view of the diaper according to the second embodiment, similar to FIG. 4. FIG. 5 is a partially enlarged view of the diaper according to the third embodiment, similar to FIG. 4.

  The following embodiments relate to disposable wearing articles (diapers) shown in FIGS. 1 to 6 and include not only indispensable constitutions of the invention but also selective and preferable constitutions.

<First embodiment>
1 and 2, the diaper 10 has a longitudinal direction Y and a transverse direction X intersecting (perpendicular to) the longitudinal direction Y, and has a skin-facing surface and a non-skin-facing surface facing the same, and an annular shape extending in a waist direction. An elastic waist panel 11, an absorption chassis (liquid absorbing structure) 12 attached to the skin-facing surface of the elastic waist panel 11, a front waist region 13, a rear waist region 14, and a region between the front and rear waist regions 13, 14. And a crotch region 15 located there.

  The elastic waist panel 11 has an elastic belt function and includes a front waist panel 16 forming a front waist region 13 and a rear waist panel 17 forming a rear waist region 14. The front and rear waist panels 16, 17 have a rectangular shape defined by inner edges 16a, 17a, outer edges 16b, 17b, and both side edges 16c, 17c. The opposite side edges 16c of the front waist panel 16 and the opposite side edges 17c of the rear waist panel 17 facing each other are overlapped with each other, and are known in a side seam 18 that is arranged at intervals in the vertical direction Y, such as hot embossing. The waist opening 19 and the pair of leg openings 20 are formed by being connected by various heat welding means such as sonic.

The front and rear waist panels 16 and 17 each include an inner sheet 21 located on the skin-facing surface side and an outer sheet 23 located on the non-skin-facing surface side. The inner and outer sheets 21 and 23 are made of an SMS (spunbond / meltblown / spunbond) fiber nonwoven fabric, a spunbond fiber nonwoven fabric or an air-through fiber nonwoven fabric having a mass of 15 to 30 g / m ² , or a plastic sheet, a perforated plastic sheet and a sheet thereof. A laminate sheet or the like can be used.

  Between the inner and outer sheets 21 and 23 of the front and rear waist panels 16 and 17, a plurality of waist elastic bodies 27 in a string shape, a strand shape, or a ribbon shape are arranged so as to be extendable and contractible in the lateral direction X, respectively. The front and rear waist panels 16 and 17 are elasticized at least in the lateral direction X. The waist elastic body 27 includes an upper waist elastic body 27A extending in the lateral direction X along the waist opening 19, and a lower waist elastic body 27B extending in the lateral direction X between the upper waist elastic body 27A and the inner edges 16a, 17a. And An upper elastic region 28A is formed in a region where the upper waist elastic body 27A is arranged, and a lower elastic region 28B is formed in a region where the lower waist elastic member 27B is arranged. The upper waist elastic body 27A is continuous in the lateral direction X between the side edges 16c and 17c of the front and rear waist regions 13 and 14. The lower waist elastic body 27 </ b> B is continuous in the lateral direction X between both side edges 16 c and 17 c of the front and rear waist regions 13 and 14 and both side edges of the liquid-absorbent core 43.

  The lower waist elastic body 27B has an outer end 32 located at both side edges 16c, 17c of the front and rear waist regions 13, 14, and an inner end 34 facing the outer end 32 in the lateral direction X. At the center of the regions 13 and 14, a part thereof is cut and contracted to define an inelastic region 36 which is absent. As described above, since the inelastic region 36 is located at the center of the front and rear waist region 13, the contraction force of the lower waist elastic body 27B is directly applied to the absorbing chassis 12 located on the skin-facing surface of the front waist panel 16. Since no gathers or the like are formed, a decrease in absorption performance due to the action of the contraction force can be suppressed.

  As a method of forming the inelastic region 36, for example, a hot melt adhesive applied region for fixing the lower waist elastic body 27 </ b> B is formed at both end portions in the lateral direction X of the front and rear waist regions 13 and 14, When a non-application area of the hot melt adhesive is formed in the central portion of the front and rear waist areas 13 and 14 in the lateral direction X, and the lower waist elastic body 27B located in the non-application area is cut (only one place), the lower waist elastic body 27B automatically contracts (snaps back). Therefore, the non-elastic area 36 in which the lower waist elastic body 27B having the contracting force does not substantially exist is formed in the non-application area.

  The waist elastic body 27 has, for example, a string-like, strand-like, or ribbon-like elasticity which has a thickness of 470 to 1240 dtex and is contractably attached in a state of being expanded 1.5 to 3.5 times. Materials can be used. Conditions such as the thickness of the waist elastic body 27, the expansion ratio, and the separation dimension (pitch) between the elastic bodies can be changed as appropriate, but in order to be stably worn on the wearer's body, It is preferable to set the condition of each elastic body so that the elasticity (contraction force) of the upper elastic area 28A by the waist elastic body 27A is larger than the elasticity of the lower elastic area 28B by the lower waist elastic body 27B. If the elasticity of the waist elastic body 27 is set in this manner, since the elasticity of the upper waist elastic body 27B on the waist opening 19 side is large, the diaper 10 can be prevented from shifting downward, and the lower part of the leg opening 20 side can be prevented. It is possible to prevent the elasticity of the waist elastic body 27B from becoming too large.

  FIG. 4 is a partially enlarged view of the rear waist region 14. Although the description of the front waist region 13 is omitted, it has the same configuration as the rear waist region 14. A cut portion (through hole) 104a that penetrates through the lower waist elastic body 27B in the thickness direction is not formed inside the lower waist elastic body 27B in the lateral direction X, whereas the thickness is outside the lateral X direction. A cut portion 104a penetrating the lower waist elastic body 27B in the direction is formed.

  In the lower waist elastic body 27B, the portion where the cut portion 104a exists loses elasticity, while the remaining portion of the lower waist elastic body 27B maintains elasticity.

  When the cut portion 104a is formed in the lower waist elastic body 27B, the cross-sectional area of the lower waist elastic body 27B in the portion having the cut portion 104a is smaller than the cross-sectional area of the lower waist elastic body 27B before forming the cut portion 104a. Therefore, the stretching force (elastic force) is significantly reduced as compared with a portion where the cut portion 104a is not formed.

  In one lower waist elastic body 27B, the portion having the cut portion 104a is the low elastic portion 51 having a small stretching force (shrinking force), and the portion having no cutting portion 104a is smaller than the low elastic portion 51. The high elasticity portion 52 has a large elasticity (contraction force), and the low elasticity portion 51 and the high elasticity portion 52 are alternately arranged in the lateral direction X.

  Therefore, according to the diaper 10, since the plurality of lower waist elastics 27B have the low elastic portion 51, the lower elastic waist 27B is prevented from strongly hitting the wearer's body while the high elastic portion 52 is prevented. Thus, the diaper 10 can be fitted to the wearer's body. Further, since the low elastic portion 51 of the lower waist elastic body 27B is also a portion having a small bending rigidity in the thickness direction, it has flexibility, and the leg opening 20 can be greatly expanded with a small force. For this reason, when wearing the diaper 10, it is easy to put a leg in the leg opening 20. Furthermore, if the area of the lower waist elastic body 27B removed by cutting is large, the difference between the contraction force of the low elastic portion 51 and the contraction force of the high elastic portion 52 can be increased. Moreover, if the cut portions 104a and 104b are opened when the diaper 10 is worn, the inside of the diaper 10 can be prevented from becoming stuffy.

  The cut portion 104a extends in the horizontal direction X between the side edges 29 of the lower waist elastic body 27B in the vertical direction Y. Therefore, since the cut portion 104a is not located on both side edges 29 of the lower waist elastic body 27B, it is possible to prevent the inner and outer sheets 21 and 23 from being caught on the cut portion 104a.

  In addition, the lower waist elastic body 27B located below the absorption chassis 12 which is the liquid absorbing structure in the vertical direction Y has the low expansion / contraction portion 51, and is located above the absorption chassis 12 in the vertical direction Y. The lower waist elastic body 27B does not have the low elastic portion 51. Therefore, on the lower side in the vertical direction Y than the absorption chassis 12, the diaper 10 can be fitted around the wearer's waist while preventing the lower waist elastic body 27B from strongly hitting around the wearer's leg. On the other hand, on the upper side in the vertical direction Y than the absorption chassis 12, the diaper 10 can be prevented from being shifted downward.

  In the front and rear waist regions 13 and 14, in the lateral direction X, a first telescopic region (first side elastic region) 29B is formed at a portion where a cut portion 104a is formed, and at a portion where the cut portion 104a is not formed. A second elastic region (second side elastic region) 29C having a larger elastic force than the first elastic region 29B is formed.

  By forming the front and rear waist regions 13 and 14 as described above, the magnitude of the expansion and contraction force (contraction force) of each of the expansion and contraction regions is as follows: the upper and lower expansion regions 28A> the second expansion and contraction regions 29C> the first expansion and contraction regions 29B.

  The first elastic region 29B is disposed between the side edges 12C of the absorbing chassis 12 and the side edges 16c, 17c of the front and rear waist regions 13, 14 in the lateral direction X. The second elastic region 29C is located between the first elastic region 29B and both side edges 43C of the liquid-absorbent core 43 as a core material, and is arranged so as to overlap a side flap 48 described later in a plan view. . Therefore, the pair of second elastic regions 29C is pressed against the body of the wearer, and the generation of a gap between the body and the front and rear waist regions 13 and 14 can be suppressed, and the excrement can be prevented from leaking.

  Further, since the cut portion 104b penetrating the inner sheet 21 is formed in the inner sheet 21 at a position overlapping with the cut portion 104a of the lower waist elastic body 27B in a plan view, the air permeability can be improved. On the other hand, since the outer sheet 23 has no cut portion, it is possible to prevent excrement from leaking.

  Referring to FIG. 2, the absorbent chassis 12 includes front and rear ends 12A and 12B attached to front and rear waist panels 16 and 17, a liquid-absorbent core 43 extending at least in the vertical direction Y in the crotch region 15, and a liquid-absorbent core. A top sheet 44 formed of a hydrophilic fiber nonwoven fabric located on the skin-facing surface side of the core 43 and a hydrophobic or liquid-impermeable fibrous nonwoven fabric located on the non-skin-facing surface of the liquid-absorbent core 43. A back sheet 45, a leak-proof sheet 46 disposed between the liquid-absorbent core 43 and the back sheet 45, and having a size that covers at least the entire surface of the liquid-absorbent core 43 facing the back sheet 45; including. For the top sheet 44 and the back sheet 45, various known fiber nonwoven fabrics such as an SMS fiber nonwoven fabric and a spunbonded nonwoven fabric can be used.

The liquid-absorbent core 43 is a mixture of a required amount of superabsorbent polymer particles and fluff pulp, and has a semi-rigidity higher in rigidity than the sheet member forming the diaper 10. The liquid-absorbent core 43 has a panel shape having a narrow central portion in the longitudinal direction Y, and is entirely covered with a liquid-diffusing sheet 47 such as a tissue. The top sheet 44 and the back sheet 45 extend outward from the peripheral edge of the liquid-absorbent core 43, and the extended portions overlap each other and are joined via a hot-melt adhesive (not shown). Thereby, side flaps 48 extending outward in the lateral direction X from both side edges 43C of the liquid absorbent core 43 and end flaps 49 extending outward in the vertical direction Y from both end edges of the liquid absorbent core are formed. Is done.

[Second embodiment]
FIG. 5 is an enlarged view similar to FIG. 4, showing the diaper 10 according to the second embodiment of the present invention. In the diaper 10, the position of the cut point 104a of the lower waist elastic body 27B located on the leg opening 20 side and the cut point 104a of the lower waist elastic body 27B adjacent to the lower waist elastic body 27B on the waist opening 19 side. Is different in the horizontal direction X. Therefore, it is possible to prevent the contraction force of the lower waist elastic body 27B from locally increasing, and to prevent a part of the lower waist elastic body 27B from strongly hitting around the wearer's leg. The diaper 10 can be fitted around the leg.

[Third embodiment]
FIG. 6 is an enlarged view similar to FIG. 4, showing the diaper 10 according to the third embodiment of the present invention. In the diaper 10, a cut portion 104b penetrating the inner sheet 21 is formed in the inner sheet 21 at a position overlapping with the cut portion 104a of the lower waist elastic body 27B in plan view, and the lower waist elastic body in plan view. The cut portion 104c is formed in the inner sheet 21 that does not overlap with 27B. Therefore, the area of the cut portions 104b and 104c that penetrate the inner sheet 21 can be increased, so that the air permeability can be improved.

  The cut portions 104a, 104b, 104c are arranged so as to be inclined with respect to the horizontal direction X and the vertical direction Y. Therefore, when the lower waist elastic body 27B contracts, the cut portions 104a, 104b, and 104c are opened in the thickness direction, and the inside of the diaper 10 can be prevented from becoming stuffy. Although not shown, the cut portion 104a may be formed to extend in the lateral direction X in an inclined manner between the side edges 29 of the lower waist elastic body 27B.

  In the diaper 10 of the third embodiment, the front and rear waist regions 13 and 14 have been described as including the inner and outer sheets 21 and 23 and the waist elastic body 27. However, the present invention is not limited thereto, and a waterproof third sheet having no cut portion may be provided on the non-skin-facing surface side of the outer sheet 23. According to the diaper 10, since the front and rear waist regions 13, 14 have the cut portions 104a, 104b, 104c, the diaper 10 has air permeability, and has a waterproof third sheet on the non-skin facing surface side. Therefore, it is possible to prevent excrement from leaking.

  In the diaper 10 of the first to third embodiments, in the lateral direction X, between the side edges 12C of the absorbent chassis 12 which is a liquid absorbing structure and the side edges 16c, 17c of the front and rear waist regions 13, 14. A pair of first elastic regions (first side elastic regions) 29B are arranged, and a second elastic region (second elastic region) (second side elastic region) between the first elastic region 29B and the liquid-absorbing core 43 as a core material in the lateral direction X. It has been described that the side elastic region (29C) is arranged. However, the present invention is not limited thereto, and the first elastic region 29B may be disposed between the liquid-absorbent core 43 and the side edges 16c, 17c of the front and rear waist regions 13, 14 in the lateral direction X.

  In the diaper 10 according to the first to third embodiments, both the front and rear waist regions 13 and 14 have been described as having the first elastic region 29B and the second elastic region 29C, but the diaper 10 according to the present invention. May have a first elastic area 29B and a second elastic area 29C only in one of the waist areas.

  Furthermore, in the diaper 10 of the first to third embodiments, the front and rear ends 12A, 12B of the absorbing chassis 12 are described as being attached to the non-skin facing surfaces of the front and rear waist regions 13, 14. However, the present invention is not limited to this, and the front and rear ends 12A, 12B of the absorbing chassis 12 may be attached to the skin facing surfaces of the front and rear waist regions 13, 14. In this diaper 10, the front and rear ends 12A and 12B of the absorbent chassis 12 are attached to the skin-facing surfaces of the front and rear waist regions 13 and 14, so the second elastic region 29C is arranged on the non-skin-facing surface of the side flap 48. Therefore, the force applied to the wearer's body by the expansion and contraction force of the second expansion and contraction region 29C can be suppressed.

  Unless otherwise specified, various known materials commonly used in this type of field can be used for each constituent material of the diaper 10 of the present invention without limitation. Also, as the basic structure of the diaper 10, in this specification, the front and rear waist regions 13, 14 are illustrated as being formed from separate front and rear waist panels 16, 17, but the front and rear waist regions 13, 14, and the crotch region. 15 and 15 may be formed by a continuous panel, or an open type in which the side edges 16c and 17c of the front and rear waist regions 13 and 14 are connected not by a pants type but connected in advance by a tape fastener. It may be a diaper. Further, terms such as "first" to "third" used in this specification are used merely for distinguishing between similar elements, positions, and the like.

10 Disposable wearing articles (disposable diapers)
12 Absorption chassis (liquid absorption structure)
12C Both side edges 13 of absorption chassis 13 Front waist area 14 Rear waist area 15 Crotch area 16c Both side edges 17c of front waist area 19 Side edges of rear waist area 19 Waist opening 20 Leg opening 27 Waist elastic body 27A Upper waist elastic body 27B Lower waist elastic Body 29B First side elastic area 29C Second side elastic area 29 Both side edges 36 Inelastic area 43 Liquid absorbent core (core material)
43 Side edges 48 of liquid-absorbent core 48 Side flap 51 Low elastic part 52 High elastic part X Horizontal direction Y Vertical direction

Claims (5)

In the vertical and horizontal directions, having a skin contact surface and a non-skin contact surface on the opposite side, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions, look including a liquid-absorbent structure from the crotch region extending in the front and rear waist regions, at least one of the waist regions of said front and rear waist regions has a side edge of the waist region of the one from the opposite side edges of said liquid-absorbent structure A pair of first side elastic regions, and a waist elastic body extending in the lateral direction in the first side elastic region, wherein at least one waist elastic body is A disposable wearing article having a low elastic portion having a cut portion and a high elastic portion having no cut portion,
The high elastic portion of the waist elastic body is a portion having a large cross-sectional area,
The wearing article according to claim 1, wherein the low elastic portion of the waist elastic body is a portion having a smaller cross-sectional area than the cross-sectional area of the high elastic portion. In the vertical and horizontal directions, having a skin contact surface and a non-skin contact surface on the opposite side, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions, A liquid-absorbing structure extending from the crotch region to the front and rear waist region, wherein at least one of the front and rear waist regions is formed from both side edges of the liquid-absorbing structure and both side edges of the one waist region. A pair of first side elastic regions located therebetween, and a waist elastic body extending in the lateral direction in the first side elastic region, wherein at least one waist elastic body is cut in the lateral direction. A disposable wearing article having a low elastic portion having a cut portion and a high elastic portion having no cut portion,
The liquid absorbing structure has a core and a side flap located outside the core in the lateral direction,
The one waist region is between the first side elastic region and both side edges of the core material, and has a second side elastic region overlapping the side flap in plan view.
A contraction force of a portion of the waist elastic body located in the second side elastic region is larger than a contraction force of the low elastic portion,
An inelastic region in which the waist elastic body does not exist is arranged inside the pair of second side elastic regions,
The wearing article, wherein the core material and the inelastic area overlap in a plan view. In the vertical and horizontal directions, having a skin contact surface and a non-skin contact surface on the opposite side, a front waist region, a rear waist region, and a crotch region located between the front and rear waist regions, A liquid-absorbing structure extending from the crotch region to the front and rear waist region, wherein at least one of the front and rear waist regions is formed from both side edges of the liquid-absorbing structure and both side edges of the one waist region. A pair of first side elastic regions located therebetween, and a waist elastic body extending in the lateral direction in the first side elastic region, wherein at least one waist elastic body is cut in the lateral direction. A disposable wearing article having a low elastic portion having a cut portion and a high elastic portion having no cut portion,
The low-stretch portion of the waist elastic body has a cut portion extending in the lateral direction between both side edges of the waist elastic body in the longitudinal direction, wherein the wearing article is characterized in that: The front and rear waist region has a plurality of waist elastics in the longitudinal direction,
The waist elastic body located on the lower side in the vertical direction from the liquid absorbing structure has the low elastic portion, while the waist elastic body located on the upper side in the vertical direction from the liquid absorbing structure. The wearing article according to any one of claims 1 to 3 , wherein the wearing article does not have the low elastic portion. The wearing article has a waist opening and a pair of leg openings,
The front and rear waist region has a plurality of waist elastics in the longitudinal direction,
The position of the cut point of the waist elastic body located on the leg opening side and the position of the cut point of the waist elastic body adjacent to the waist opening side with respect to the waist elastic body are different in the lateral direction. The wearing article according to claim 3 , wherein

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