JPH10137285A - Pants type disposable diaper - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve fitness at the time of wearing by forming the flexible elastic member of an opening part around the waist out of a flexible elastic ribbon and holding an absorptive main body on the front body side and the end edge of an armor member so as to draw an arc in the direction toward the center of a diaper by the flexible elastic ribbon. SOLUTION: Both end edges 26 in a diaper longitudinal direction of the absorptive main body 9 and the armor member are held and joined to a flexible elastic ribbon holding part 17 so as to draw the arc in the direction to word the center of this diaper along the waist and a flexible sheet 16 inside a diaper main body 27 is joined to the flexible elastic ribbon 5 in a stretched state. Also, both end edges in a longitudinal direction of a three-dimensional gather foldover part 19 are covered so as to be held by the flexible elastic ribbon holding part 17. Thus, the fitness at the peripheral part of the flexible elastic ribbon to be tightly adhered to a wearing parson is improved and an unpleasant feeling is not given even in the case that materials for constituting three- dimensional gathers are overlapped at the three-dimensional gather foldover part and turned to a projected shape or texture is hardened.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pants-type disposable diaper which is formed in a pants-type in advance, and more particularly to a pants-type disposable diapers having a good fit around a waist.

[0002]

2. Description of the Related Art As a pants-type disposable diaper, in a flat type diaper side flap as disclosed in Japanese Patent Application Laid-Open No. 57-77304, the portions corresponding to the left and right abdominal parts when worn are bonded in advance. It has been proposed to provide a waist opening and a leg opening in a fixed state.

In addition, a liquid-permeable top sheet and a liquid-impermeable back sheet as disclosed in Japanese Patent Application Laid-Open No. 4-161152, and an absorbent formed by an absorber disposed therebetween. A diaper having a configuration in which a sex body is joined to the inside of an exterior member having openings formed around a waist and around a leg made of a separate body has also been proposed.

[0004] The above-mentioned pants-type disposable diaper can be detached by a wearer, and its demand is increasing even when the diaper is separated from an infant or for adults such as incontinent persons.
In addition, since the pants-type disposable diaper is provided with elastic members at the waist opening and the leg opening to form gathers, it fits the wearer's body when worn and has a good fit. It has the function of preventing leakage from the opening.

[0005]

SUMMARY OF THE INVENTION The above-mentioned Japanese Patent Application Laid-Open No. 4-161 is disclosed.
In a pants-type diaper of a so-called pad type in which an absorbent main body is joined to the inside of an exterior member, as described in JP-A-152-152, it is unnecessary in terms of its configuration or function. The width is smaller than the lateral width when the outer member is released from the flank joint and deployed. In addition, in order to enhance the leakage preventing effect of the used diaper, a means is often used in which gathers are provided on both side edges of the absorbent main body, or three-dimensional gathers are formed by raising the gathers. Therefore, on both side edges of the absorbent main body, an elastic body for forming a gather, an adhesive for fixing the elastic body, a sheet folded portion for forming a three-dimensional gather, and the like are required. Becomes noticeable at both side edges of the absorbent body.

[0006] In such a case, when the absorbent main body is joined to the inside of the exterior member, the side edges of the absorbent main body may have a harder texture than other portions or may be convex only at that portion. In the surrounding area, the stretch elastic member is arranged, and when worn, it is in close contact with the wearer's skin, so it stimulates the skin, resulting in discomfort to the wearer and rubbing around the waist There are problems such as cause.

Further, when the elastic member is attached to the opening around the waist of the pants-type disposable diaper, since the elastic member, the absorbent body and the outer edge are arranged in parallel, the wearer can wear the elastic member. Does not fit the roundness of the abdomen, leaving gaps around the legs due to the diaper sliding down, causing leakage, and the appearance of the joints is prominent in the appearance, so only the joints are emphasized There was a problem that it seemed to slip down. Accordingly, it is an object of the present invention to provide a pants-type disposable diaper that has a good fit when worn, suppresses the diaper from falling down, and has an effect of preventing leakage.

[0008]

According to the present invention, there is provided an absorbent body formed by a liquid-permeable top sheet, a liquid-impermeable back sheet, and an absorber disposed between these two sheets; An exterior member that surrounds the waist from the abdomen and holds the absorbent body against the wearer and holds both sides of the front body and the back body of the exterior member, and the waist opening and the pair of leg openings are joined. Forming a part, a pants-type disposable diaper to which a stretchable elastic member is attached along these openings, wherein the stretchable elastic member at the waist opening is:
The absorbent body and the outer member are formed by a stretchable elastic ribbon attached so as to sandwich both edges thereof, and at least the edges of the absorbent body and the outer member on the front body side are directed toward the center of the diaper. The present invention relates to a pants-type disposable diaper which is sandwiched between elastic elastic ribbons so as to draw a convex arc.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A pants-type disposable diaper according to the present invention is mounted such that an elastic member at an opening around a waist sandwiches both edges of a laminated absorbent main body and an exterior member. It is formed by a stretchable elastic ribbon. In this case, at least the front body side edge corresponding to the wearer's abdomen is sandwiched between the elastic elastic ribbons so as to draw a convex arc toward the center of the diaper. It fits well and can more effectively prevent sliding down and the accompanying leakage.

[0010] Further, since the edges of the absorbent body and the exterior member are sandwiched between the elastic ribbons and joined in a covered state, especially at the waist circumference, both sides of the absorbent body are worn during wearing. Since the skin is not irritated by poor texture or thickness due to the edge shape, it is possible to obtain a pants-type disposable diaper having a good fit without giving the wearer discomfort.

The elastic elastic ribbon used in the present invention may be one in which one strip sheet is folded in two along a folding line along the longitudinal direction, or two strip sheets are arranged to face each other. Further, a region of a predetermined width near one side edge of the belt-shaped sheet arranged facing each other arranges the elastic member between the sheets in an extended state,
The other area is a non-joining area where the elastic member is not disposed between the sheets, and the both ends in the longitudinal direction of the absorbent main body and the exterior member are non-joining of the elastic elastic ribbon. It is sandwiched between the band-shaped sheets facing each other in the region, and is joined to the stretchable elastic ribbon in a covered state.

Further, in a sandwiching connection region between the elastic elastic ribbon and the absorbent body and the exterior member, at least one of both ends in the longitudinal direction of the diaper is provided with an elastic member between elastic elastic ribbon sheets in a joining region.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a perspective view of a pants-type disposable diaper according to an embodiment of the present invention. The pants-type disposable diaper 1 shown in FIG. 1 has an opening 2 around the waist and an opening 3 around the leg, and an elastic elastic ribbon 5 is attached to the opening 2 around the waist. The front body 6 and the rear body 7 formed to extend from the left and right leg surrounding openings 3 are adhesively closed by side seams 8.

The adhesive closure of the side seam 8 is
The front body 6 and the back body 7 are overlapped via the crotch portion of the exterior member 18 (see FIG. 3) so that the inside (see FIG. 3) is on the inside, and both sides are protruded outward, or both sides are on the inside. Hot melt adhesive, pressure melting, ultrasonic melting, etc. alone or in combination along the outermost sides of both sides in the state of protruding, or with one side edge outward and the other side edge inwardly protruding By joining.

FIG. 2 shows a state in which the side body 8 of the pants-type disposable diaper 1 of the present invention shown in FIG. FIG. 5 is a perspective view showing a state in which the elastic elastic ribbon 5 is attached at a portion of the elastic elastic ribbon holding portion 17 (see FIG. 5). When attached in the state of FIG. The left and right leg openings 3 are shown as side flaps 4 respectively.
Is provided with an elastic member 15 around the leg.

FIG. 3 is a plan development view of the absorbent body 9 and the exterior member 18 constituting the pants-type disposable diaper of the present invention, and FIG. 4 is a plan view of the absorbent body 9 and the exterior member 1.
FIG. 8 is a developed plan view showing a case where the laminate 8 is joined to form a laminate. As shown in FIG. 4, the absorbent main body 9 is joined to the exterior member 18 in a predetermined region at the center thereof. The bonding area does not need to adhere to the entire surface of the absorbent main body, and a straight line portion connecting both ends in the longitudinal direction of the absorbent main body 9 and both ends in the longitudinal direction of the absorbent main body 9 and the center in the width direction of the absorbent main body 9. Is sufficient, and it is preferable that the longitudinal side edges of the absorbent main body 9 be in a non-joined state because the absorbent main body has good adherence and conformability to the body when worn.

In FIG. 3, the absorbent body 9 is the topsheet 1
0, a back sheet 11, an absorber 12, and a stretchable elastic member 14, and a solid gather 13 is formed on both side edges of the absorbent main body 9. In addition, since the three-dimensional gathers 13 are formed as shown in FIGS. 3 and 4, three-dimensional gather folded portions 19 are formed on both side edges near both ends in the longitudinal direction of the absorbent main body 9, and the three-dimensional gather folded portions 19 are formed. Is an overlapping portion of the top sheet 10, the back sheet 11, the elastic member 14, and an adhesive (not shown) for bonding and fixing these. The three-dimensional gather 13 and the three-dimensional gather folded portion 19 may be formed separately from the material forming the absorbent main body 9, and may be attached to a side edge of the absorbent main body 9. (Not shown)

The outer member 18 is provided with a back sheet 25 at a portion of the outermost layer sheet 24 where the absorbent body 9 is joined at the center in the horizontal direction. A stretchable sheet 16 is arranged with 15 interposed therebetween. Further, side seam portions 8 are formed by both side edge portions of the exterior member 18 extending outside the side edges of the elastic sheet 16, and when molded into a pants-type disposable diaper, the front body 6 is formed. It is bonded at a pair of right and left side seams 8 facing each other on the back body 7.

FIG. 5 shows a portion of the diaper main body 27 shown in FIG. 4 in which the elastic sheet 5 of the diaper main body 27 is stretched and the elastic elastic ribbon 5 is pinched and joined to both ends in the longitudinal direction of the diaper at the elastic ribbon clamping section 17. Things. At this time, both ends 26 in the diaper longitudinal direction of the absorbent main body 9 and the exterior member 18 are sandwiched and joined to the elastic elastic ribbon sandwiching portion 17 so as to draw an arc protruding toward the center of the diaper along the waist. In addition, the periphery of the stretchable elastic ribbon follows the roundness of the wearer's abdomen, and has good fit. At this time, since the stretchable sheet 16 in the diaper main body 27 is joined to the stretchable elastic ribbon 5 in the stretched state, when the pants-type disposable diaper shown in FIG. The width of the diaper main body 27 shown in FIG.
The elastic sheet 16 does not shrink and adheres to the wearer around the waist and around the waist, so that the diaper does not slip down and has a good appearance.

Further, since both ends in the longitudinal direction of the three-dimensional gather folded portion 19 are covered so as to be sandwiched by the stretchable elastic ribbon holding portion 17, the fit of the stretchable elastic ribbon peripheral portion which is in close contact with the wearer is improved. Even if the material forming the three-dimensional gathers is superimposed on the three-dimensional gather folding portion 19 to form a convex shape or the texture is hardened, the stretchable elastic ribbon 5 continuous in the width direction is in contact with the skin. Does not cause discomfort.

FIG. 6 is a vertical cross-sectional view of the elastic elastic ribbon 5. The single band-shaped sheet 20 is folded into two pieces with a central portion in the width direction as a fold line, and a waist elastic member 21 is provided in a predetermined area 22 on the fold line side. The stretched elastic regions 22 are formed by sandwiching the stretched state between the belt-shaped sheets 20 and joining the opposed belt-shaped sheets 20 together. In addition, a region other than the stretchable elastic region on the opposite side of the fold line does not bond the facing strip-shaped sheets 20, and forms a non-bonding region 23. In the non-bonding region 23, the non-bonding region 23 includes It is joined so as to sandwich the joined laminate.

At least two sheets of the stretchable elastic ribbon are arranged to face each other, and a stretchable elastic member around the waist is arranged on one side edge of the ribbon with a center line in the width direction therebetween to bond a predetermined area between the sheets. Thus, the elastic region 22 may be formed, and the non-joining region 23 may be formed on the other side edge to form the elastic elastic ribbon holding portion 17. In the present invention, the waist-surrounding elastic member 21 uses a thread-like elastomer in the figure, but its shape is not limited to a flat shape but a film shape or the like.
It can be used regardless of shape.

As the top sheet 10 of the pants-type disposable diaper having the above structure, polyethylene, polypropylene,
A liquid permeable non-woven fabric made of synthetic fiber made of polyester or other thermoplastic resin is used. In order to form the three-dimensional gathers 13 by the side edges of the topsheet 10, both side edges are required to enhance the effect of preventing leakage. It is preferable that only a portion is subjected to hydrophobic processing or is made liquid-impermeable. Further, the three-dimensional gather 13 may be formed by using a liquid-impermeable non-woven fabric and attaching them to the both side edges of the absorbent main body 9 separately.

Back sheet 11 and back sheet 25
Is a liquid-impermeable polyethylene sheet, preferably a polyethylene sheet provided with micropores, or a moisture-permeable liquid-impermeable sheet that is stretched by adding a filler to a thermoplastic resin. Disappears,
More comfortable. The thickness of the back sheet 11 and the back sheet 25 is preferably 20 to 40 μm.

In addition to the elastic member 14 disposed at the top end of the three-dimensional gather 13, an elastic member 15 around the leg opening,
The waist opening elastic member 21 can be used as it is, such as a urethane film, urethane thread, urethane foam, thread rubber, etc., which are used in ordinary disposable diapers. In an extended state, it is arranged at the three-dimensional gather portion, the leg opening, and the waist opening, and is adhered and fixed with a hot melt adhesive.

The absorber 12 is preferably made of fluff pulp and a high-absorbency polymer in combination with the main material. In addition, a single absorbent paper, or a mixture or laminate of heat-fused fibers is used. Further, it is preferable to form a laminated structure in which the whole is wrapped with a tissue. The shape of the absorber 12 may be an hourglass type or a rectangular shape, but the hourglass type provides better fit.

The stretchable sheet 16 having stretch elasticity is formed on at least one surface of the elastomer nonwoven web alone or the elastomer nonwoven web, such as polyester fiber such as polyethylene terephthalate fiber, polyamide fiber such as polyolefin fiber or nylon fiber, or cotton fiber. For example, a web or the like obtained by hydroentangling or laminating a fiber layer made of a material selected from the group including various cellulose fibers, pulp fibers, and mixtures thereof is used. Also 5-4
A moisture-permeable, stretchable polyurethane-based film having a thickness of 0 μm, a natural rubber sheet, and a web or a hydroentangled nonwoven fabric obtained by hydroentangling or laminating the fiber layer on at least one surface of a foamed sheet, or Alternatively, a laminate obtained by laminating a thermoplastic resin having moisture permeability and elasticity such as polyurethane, polyolefin, or the like to the fiber layer may be used.

The outermost sheet 24 is made of a material selected from the group including polyester fibers such as polyethylene terephthalate fibers, polyolefin fibers, polyamide fibers such as nylon fibers, cellulosic fibers such as cotton fibers, pulp fibers and mixtures thereof. Obtained by hydroentanglement of a fiber layer made of The outermost sheet 24 is provided with the elastic sheet
And form a part of the exterior member 18, but have a property of being stretched when a tensile force acts to prevent the elasticity of the stretchable sheet 16 from being hindered. Although it returns to its original state due to elasticity, the outermost layer sheet 24 does not need to have the property of contracting.

The belt-like sheet 2 forming the elastic ribbon 5
No. 0 uses a nonwoven fabric made of a synthetic fiber made of polyethylene, polypropylene, polyester, or other thermoplastic resin, but is a relatively bulky and highly flexible nonwoven fabric in order to enhance the fit around the waist when attached. It is desirable. The width of the stretchable elastic region of the stretchable elastic ribbon 5 is preferably 10 to 50 mm, preferably about 20 to 30 mm, and when the width is 10 mm or less, the area where the stretchable elastic ribbon 5 is in contact with the skin is too small to cause contraction of the stretchable elastic member. This is not preferable because the tightening pressure of the skin increases, and the skin tends to be scarred. On the other hand, if the width is 50 mm or more, it is too wide and the appearance is not good, and it may be folded inside during wearing, which is not preferable. The width of the non-joining region 23 of the elastic elastic ribbon 5 may be such that the adhesive strength between the elastic elastic ribbon 5, the absorbent body 9, and the laminate of the exterior member 18 can be sufficiently obtained. In the case of joining with a hot melt adhesive, a thickness of about 5 to 20 mm is preferable.

[0030]

As described above, in the so-called pad structure type pants-type diaper in which the absorbent main body according to the present invention is joined to the inside of the exterior member, at least the front body side edges of the absorbent main body and the exterior member are diapers. The waist fits well along the radius of the wearer's abdomen, and slides down and further off during wear because it is clamped and attached to the elastic elastic ribbon so as to draw a convex arc toward the center Leakage from the gap due to falling can be prevented. In addition, since the overlapping portions of the constituent materials around the waist due to the folded portions of the sheets at the both side edges for forming the three-dimensional gathers are covered with the elastic elastic ribbon, the texture of the side edges of the absorbent body deteriorates when worn, Provided is a pants-type disposable diaper having a stretchable elastic ribbon around a waist, in which irritation to the skin due to a convex bulge is reduced, the fit during wear is good, and the wearer does not cause discomfort. It becomes possible.

[Brief description of the drawings]

FIG. 1 is a perspective view of a pants-type disposable diaper according to the present invention.

FIG. 2 is a perspective view showing a state where a side seam of the pants-type disposable diaper of FIG. 1 is released.

FIG. 3 is an exploded perspective view of the absorbent body and the exterior member of the pants-type disposable diaper of FIG.

FIG. 4 is a perspective view showing a laminated state of the absorbent main body and the exterior member of the pants-type disposable diaper of FIG.

5 is a perspective view showing a state in which a stretchable elastic ribbon is attached to a laminate of the absorbent body and the exterior member of the pants-type disposable diaper of FIG.

FIG. 6 is a cross-sectional view of the elastic ribbon cut vertically.

[Explanation of symbols]

 1: Pants-type disposable diaper 2: Waist opening 3: Leg opening 4: Side flaps 5: Elastic elastic ribbon 6: Front body 7: Back body 8: Side seam 9: Absorbent body 10: Surface sheet 11: Back sheet 12: Absorber 13: Gathering 14: Elastic elastic member 15: Elastic elastic member around the leg 16: Elastic sheet 17: Elastic ribbon sandwiching part 18: Exterior member 19: Solid gather folded part 20: Belt sheet 21: Elastic elastic member around waist opening 22: Elastic elastic area 23: Non-joining area 24: Outermost layer sheet 25: Back sheet 26: Diaper longitudinal edge of absorbent body and exterior member 27: Diaper body

Claims (1)

[Claims] 1. A liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body formed by an absorber disposed between these two sheets, and a body surrounding the waist from the belly of the wearer. An exterior member that holds the absorbent body against the wearer and holds both sides of the front body and the rear body of the exterior member to form a waist opening and a pair of leg openings, and these openings A pants-type disposable diaper to which an elastic member is attached along, wherein the elastic member at the waist opening is attached so as to sandwich both edges of the absorbent body and the exterior member. Characterized in that at least the edges of the absorbent body and the exterior member on the front body side are sandwiched by the elastic ribbon so as to draw a convex arc toward the center of the diaper. Pants-type disposable diapers to be.