JP4139933B2 - Disposable paper diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a disposable paper diaper that is easy to pass through when worn, improves ease of wearing, and has an appearance close to trunks, particularly suitable for adults.
[0002]
[Prior art]
Traditionally, pants-type disposable paper diapers are marketed together with tape-type disposable paper diapers for the purpose of promoting separation of diapers, releasing adults from wearing work with fastening tape, and simplifying wearing. Has been provided to.
[0003]
The present applicant has also proposed a pants-type disposable paper diaper in JP-A-10-127687 and JP-A-11-128267. If the pants-type disposable paper diaper proposed in the former Japanese Patent Laid-Open No. 10-127687 is described as an example, the pants-type disposable paper diaper includes a liquid-permeable top sheet 52, polyethylene and the like as shown in FIG. The main body back sheet | seat 51 is provided in the outer surface side of the paper diaper main body 50 which consists of the waterproof film 53 which consists of this, and the absorber 54 interposed between these both sheets.
[0004]
The main body back sheet 51 has a two-layer structure of a front surface back sheet 55 and a back surface back sheet 56, and a waist elastic elastic member for sealing a waist opening of a paper diaper between the two sheets 55 and 56. .., 58... Are disposed, and the abdomen elastic stretching member 59,. ..., and a leg-surrounding first elastic expansion / contraction member 61 for sealing the leg periphery and a leg-surrounding second elastic expansion / contraction member 62, ... are provided. The first elastic elastic member 61 around the leg includes one or more elastic members arranged continuously from the front body F end around one leg to the front body F end around the other leg around the crotch. The leg elastic second elastic elastic members 62,... Are arranged continuously from the rear body B end around one leg to the crotch part and to the rear body B end around the other leg. One or a plurality of elastic elastic members. In the crotch portion of the paper diaper, the first elastic elastic members 61, ... and the second elastic elastic members 62, ... are arranged along the width direction of the paper diaper while approaching without intersecting.
[0005]
The paper diaper main body 50 is integrally bonded and fixed to the front surface backsheet 55 of the main body backsheet 51 by a hot melt adhesive on the outer surface side of the waterproof film 53. The above-mentioned paper diaper is formed into a pants shape by overlapping the front body F and the back body B on the folding line L in the substantially center, and joining both side edges using a welding method such as ultrasonic welding. . FIG. 9 is a perspective view showing the product state.
[0006]
[Problems to be solved by the invention]
However, in the case of such a pants-type disposable paper diaper, a problem that the wearer himself feels very shameful when worn by an elderly person has been clarified by a questionnaire survey or the like. In other words, especially when used for the first time, this type of disposable diaper has been used mainly for babies and, according to past experience, it is necessary to use this type of disposable diaper. I found out that I was shocked by the embarrassment.
[0007]
In order to solve such a problem, Japanese Patent Application Laid-Open No. 11-206808 (conventional example 1), Japanese Patent Application Laid-Open No. 10-10, which reduces the appearance of a pants-type disposable paper diaper as closely as possible to the trunks type. No. 503400 (conventional example 2).
[0008]
As shown in FIG. 10, the disposable disposable diaper described in the former Conventional Example 1 is composed of a brief diaper main body 70 and a trunks-type covering 71 capable of shielding the main body 70, and the covering 71 is substantially composed of two overlapping sheets, and at least one of the sheets is formed with a target Z-shaped and inverted Z-shaped bent portion with respect to a center line that bisects the width direction of the diaper. The disposable disposable diaper described in the latter conventional example 2 has a structure in which a trunks-like cover 73 is separately provided outside the disposable diaper 72 in the product state, as shown in FIG.
[0009]
However, when the trunks-type disposable paper diaper with both side edges closed from the waist substantially to the length range that conceals the main body of the diaper as described above, the front and back bodies of the diaper are shirred (multiple The cover 71, the cover 73, etc. are not elastic to bring the appearance close to the trunks, and the restraint at the side is large. It turns out that it is very difficult for elderly people with physical disabilities.
[0010]
In addition, these trunks type disposable paper diapers have a function as a paper diaper as a single unit even when the structure of the main body of the paper diaper is seen, and the cover 71 or the cover 73 is merely added for cosmetic purposes. For this reason, there are problems such as an increase in the number of parts and an increase in cost.
[0011]
Furthermore, with regard to the manufacturing process, the front body and the back body are separate sheets, and the joining line for joining these sheets becomes long, so that much labor is required for production.
[0012]
Therefore, the main problem of the present invention is that the appearance is made trunk-like without increasing the number of parts and complicating the conventional manufacturing process, making it easy to pass the foot when worn, and ease of wearing. The object is to provide an improved disposable paper diaper.
[0013]
[Means for Solving the Problems]
The present invention for solving the above problems is a paper diaper main body in which an absorbent is interposed inside a liquid-permeable top sheet covering the use surface side and a waterproof film covering the back surface side,
The crotch part is folded back as a folding line, the front and back bodies are joined at both side edges except for the leg opening, and the waist has an opening on the upper side, and only the elastic waist elastic member along the circumferential direction It is composed of an exterior sheet formed into a trunks shape having a substantially hexagonal shape in a front view in which the leg opening is formed obliquely downward in a product state,
The paper diaper main body is disposed in a range over the back body through the crotch portion from the front body on the inner surface side of the outer sheet Rutotomoni, front body and back body of the waterproof film plane outer sheet of the front and rear end regions Are adhered to each other, and at least in the crotch region are not adhered to the exterior sheet,
The distance between the front and rear end edges of the disposable diaper body and the lower end of the elastic elastic member disposed around the waist opening is 20 mm or more, and connects the upper end on one side and the upper end on the other side of the waist opening. An angle formed by a horizontal line and a joint line formed by joining the front body and the back body at both side edges excluding the leg opening is 45 ° or less, and the length of the leg diaper in the longitudinal direction Is 15 cm or more .
[0014]
In this invention, it consists of a paper diaper main body and an exterior sheet | seat, and the trunks-like external appearance was exhibited by the said exterior sheet | seat. This exterior sheet is a surface sheet member corresponding to the main body back sheet 51 in a conventional pants-type disposable paper diaper, and is described in comparison with a conventional pants-type disposable paper diaper. The side elastic elastic members 60, ..., and the leg elastic first elastic elastic members 61, ... and the leg elastic second elastic elastic members 62, which seal the circumference of the legs are eliminated, and the elastic elastic members are disposed around the waist. The overall shape is a trunks-like appearance. Therefore, it can be easily manufactured by a slight change of the conventional manufacturing equipment without increasing the number of parts and without complicating the conventional manufacturing process. Further, by omitting the elastic elastic member around the leg, the leg hole is not narrowed and is a large opening, so that it is easy to pass the foot and the foot is not caught by the elastic member. Further, by omitting the abdominal and dorsal elastic elastic members, the feeling of pressure on the abdomen is eliminated, the appearance of the diaper is eliminated, and shame can be reduced.
[0015]
At this time, the front and rear edges of the paper diaper main body are prevented in order to prevent the absorbent body from being wrinkled or constricted due to the shrinkage force of the waist elastic elastic member disposed along the waist opening, thereby damaging the trunks-like appearance. It is desirable that the distance between the lower end of the elastic elastic member disposed around the waist opening is 20 mm or more.
[0016]
Further, in order to make it easier to pass the foot when wearing and improve ease of wearing, the horizontal line connecting the upper end of one side of the waist opening and the upper end of the other side, the front body and the back body It is desirable that the angle formed by the joining lines joined at both side edges excluding the leg opening is 45 ° or less, and the longitudinal dimension of the leg diaper is 15 cm or more. Thereby, when mounting | wearing, while the restraint in the joint side edge part which joined the front body and back body is eliminated, a leg | foot becomes easy to pass through, and the feeling of mounting | wearing at the time of wearing will also become favorable.
[0017]
On the other hand, in the paper diaper main body, it is desirable that the waterproof film surfaces of the front and rear end regions are respectively bonded to the front body and the back body of the exterior sheet, and at least the crotch region is not adhered to the exterior sheet, and more preferably The paper diaper main body preferably has a spacing of at least 5 mm from the exterior sheet in the crotch region. By not bonding the paper diaper main body and the exterior sheet in the inseam area, the paper diaper main body will not be misaligned following the movement caused by walking or exercise, and only the paper diaper main body is always firmly attached to the body in good condition. To come.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
[0019]
1 is a front view of a trunks-type disposable paper diaper according to the present invention in a no-load state (product state), FIG. 2 is a front view of a waist opening extending sideways, and FIG. 3 is a III-III line arrow of FIG. FIG. 4 is an assembly view. 5-7 is a figure which shows a paper diaper main body. In addition, the adhesion site | part is clearly shown by x mark in the required location of FIG. 6 and FIG.
[0020]
As clearly shown in FIGS. 1 and 4, the trunks-type disposable diaper 1 is composed of a liquid-permeable top sheet 11 made of a nonwoven fabric or the like and a waterproof film 12 made of polyethylene or the like, and an absorbent body made of cotton-like pulp or the like. 13 is a paper diaper having a structure in which an outer sheet 20 having a substantially hexagonal shape is integrally provided on the outer surface side of a paper diaper main body 10 having a structure 13 interposed therebetween.
[0021]
Hereinafter, the structure of the said paper diaper main body 10 and the exterior sheet | seat 20, and its assembly structure are demonstrated in order.
[0022]
(Structure of the disposable diaper body 10)
First, the structure of the paper diaper main body 10 will be described in detail with reference to FIGS. The paper diaper main body 10 is mainly composed of a liquid-permeable top sheet 11, a waterproof film 12, and an absorbent body 13 interposed therebetween.
[0023]
The absorbent body 13 includes an hourglass-shaped lower absorbent body 13A having a large area and a rectangular upper absorbent body 13B having a slightly narrow area, and these enclose the absorbent body 13 in a square shape in plan view. It is surrounded by paper 14A, 14B and has a semi-rigid property that can be deformed as a whole. The lower absorbent body 13A and the upper absorbent body 13B contain a powdery or granular polymer absorbent polymer. ing. The liquid-permeable top sheet 11 is fixed to the upper surface of the absorbent body 13 by a hot melt adhesive on almost the entire surface, and the waterproof film 12 is also fixed to the lower surface of the absorbent body 13 by the hot melt adhesive. A paper diaper main body 10 is configured.
[0024]
As the material constituting the liquid permeable top sheet 11, in addition to synthetic fibers such as polyethylene or polypropylene such as olefins, polyesters, and amides, recycled fibers such as rayon and cupra, natural fibers such as cotton are spanned. A porous or non-porous nonwoven fabric obtained by an appropriate nonwoven fabric manufacturing method such as a bond method, a thermal bond method, a melt blown method, or a needle punch method can be used, a porous plastic sheet, and a porous plastic sheet and a nonwoven fabric Any suitable material that can permeate body fluids, such as a laminated sheet, can be used.
[0025]
The waterproof film 12 is made of a liquid-impervious sheet such as polyethylene or polypropylene. In recent years, a film having moisture permeability is preferably used from the viewpoint of preventing stuffiness. This water-impervious / breathable sheet is a microporous sheet obtained by, for example, melt-kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching in a uniaxial or biaxial direction. If the sheet thickness is the same, the rigidity is lower than that of the non-porous sheet, which is superior in terms of flexibility.
[0026]
The front and rear ends of the disposable diaper main body 10 are formed with front and rear end end joints 16 and 17 formed by polymerization of the liquid-permeable top sheet 11 and the waterproof film 12 without the absorber main body 13. The main body 13 is enclosed.
[0027]
On the other hand, three-dimensional gathers B and B standing on the surface side are formed by the liquid-permeable top sheet 11, the crepe papers 14A and 14B, and the waterproof film 12 at least in the middle part on both sides of the paper diaper main body 10. ing. That is, as shown in FIGS. 6 and 7, the liquid-permeable top sheet 11, the crepe papers 14 </ b> A and 14 </ b> B, and the waterproof film 12 all extend laterally from the side edge of the absorbent body 13. (Hereinafter, this portion is referred to as a laterally extending portion), and the laterally extending portions are provided by a plurality of elastic stretching members 15 and 15 in the illustrated example disposed at the outermost edge portion. Three-dimensional gathers B and B are formed with standing portions standing on the surface side.
[0028]
More specifically, the crepe papers 14A and 14B wrap the hourglass-shaped absorber body 13 in a square shape in plan view, and the crepe papers 14A and 14B absorb the absorbent body at the intermediate side edge of the absorber body 13. An extending portion where the main body 13 does not exist is formed.
[0029]
On the other hand, the waterproof film 12 disposed on the back side is formed so as to extend sideways beyond the side edges of the absorbent body 13 and also beyond the side edges of the crepe papers 14A and 14B. . On the other hand, the liquid-permeable top sheet 11 extends sideways beyond the side edges of the crepe papers 14A and 14B, and then folded back twice. It is fixed to the outer surface of the waterproof film 12 with an adhesive such as hot melt. Inside the double folded portion, one or a plurality of, in the illustrated example, two elastic elastic members 15, 15 are arranged along the diaper longitudinal direction.
[0030]
As shown in FIG. 7, the laterally extending portion wraps around the side edge of the absorbent body 13 at the front and rear ends of the disposable diaper body 10, and the hot melt adhesive is applied to the surface of the liquid-permeable top sheet 11. Is glued by.
[0031]
As a result, when the product is in use, only the middle portion thereof becomes a free end, and rises upward in accordance with the contraction force of the elastic elastic members 15, 15. For the liquid-permeable top sheet 11 constituting the three-dimensional gather B, in order to reduce the liquid permeability as much as possible to prevent the passage of body fluids, to prevent fogging and to improve the feel to the skin (dry feeling) It is desirable to use a water-repellent treated non-woven fabric coated with a silicon-based, paraffin metal-based, alkyl chromic croid-based water repellent or the like. Further, as the elastic elastic member 15, materials such as styrene rubber, olefin rubber, urethane rubber, ester rubber, polyurethane, polyethylene, polystyrene, styrene butadiene, silicon, polyester, etc., which are usually used can be used. .
[0032]
In the three-dimensional gather B of this mode, the standing height of the crotch part, particularly the crotch region, is sufficiently increased to prevent a gap from being formed between the skin and effectively prevent side leakage. That is, the absorber main body 13 has an hourglass shape as a whole, and is relatively narrow at the intermediate portion. The narrow side of the absorber side edge position, that is, the position of the absorber front and rear end portion that enters the inside substantially becomes the standing base end of the three-dimensional gather B, so that it stands up particularly in the crotch region. Even if the height of the crotch is secured sufficiently, and even if the entire disposable diaper hangs down due to the weight of excrement, etc. The side leakage is surely prevented without forming a gap.
[0033]
(Structure of exterior sheet 20)
The exterior sheet 20 is made of a synthetic fiber such as polyethylene or polypropylene such as olefin, polyester or amide, recycled fiber such as rayon or cupra, natural fiber such as cotton, a spunbond method, a thermal bond method, a meltblown method. A perforated or non-porous nonwoven fabric obtained by an appropriate nonwoven fabric manufacturing method such as a high-pressure water entangling method can be used, or an arbitrary sheet body such as a laminated nonwoven fabric obtained by lamination with a plastic sheet and a nonwoven fabric can be used. Can do. In this example, in order to keep away from the appearance and texture of the conventional pants-type paper diaper using a plastic sheet as the top sheet, a non-woven fabric is used.
[0034]
In the conventional type disposable diaper described in the section of “Prior Art”, the main body backsheet 51 corresponding to the exterior sheet 20 is provided with the first leg elastic first elastic members 61,... And the second leg elastic members 62,. Since it is necessary, a multi-layer sheet structure of the front back sheet 55 and the back back sheet 56 is adopted. However, in the present trunks-type disposable paper diaper, an elastic stretchable member is not provided around the leg, so it is necessary to form a multi-layer sheet. Rather, a single layer sheet is sufficient. Of course, a multilayer sheet may be used for improving the texture and the like, and a part of the front body and the back body may have a multilayer sheet structure as described later.
[0035]
As shown in FIG. 4, the exterior sheet 20 has a pseudo hourglass shape as a whole in which hexagonal sheets having a substantially base plate shape are arranged in a line-symmetric shape.
[0036]
Folded portions 20A and 20B are formed at the front and rear end portions of the exterior sheet 20, and a plurality of, in the illustrated example, five waist elastic elastic members 21, 21... Are disposed inside the folded portions 20A and 20B. ing. It is desirable that the waist elastic elastic members 21, 21... Have an expansion / contraction ratio of 100 to 300% and an elastic expansion / contraction force of 1000 to 5000 g. The width of the waist elastic elastic members 21, 21... Is approximately 10 to 40 mm, and it is desirable that the elastic elastic members 21, 21.
[0037]
Further, reinforcing nonwoven fabrics 22 are laminated on the upper sides of the front body and the back body with overlapping portions with respect to the folded portions 20A and 20B, respectively. The reinforcing non-woven fabric 22 is disposed so as to cover the upper surface of the diaper main body 10 to be described later at the front and rear ends of the adhesive sheet 18 and 19 with the outer sheet 20 at about 1/2 width.
[0038]
(Assembling paper diapers)
The said paper diaper main body 10 and the exterior sheet 20 are each manufactured separately, and as shown in FIG. 4, the paper diaper main body 10 is bonded and integrated on the upper surface side of the exterior sheet 20 by an adhesive S such as hot melt. In this case, the paper diaper main body 10 and the exterior sheet 20 are bonded only in the bonding areas 18 and 19 (hatched areas in FIG. 4) at the front and rear end portions of the paper diaper main body 10, and are not bonded in the crotch area. As shown in the longitudinal section showing the mounted state in FIG. 3, in the crotch region, the disposable diaper main body 10 is separated from the outer sheet 20 and fixed so as to float upward. The separation width S is 2 to 50 mm or more, preferably about 5 to 30 mm. In this way, in the crotch region, the paper diaper main body 10 and the outer sheet 20 are not bonded and separated, so that the paper diaper main body 10 does not move following the movement of the outer sheet 20 due to walking or exercise, Even if the outer sheet 20 moves, the paper diaper main body 10 is maintained in a proper wearing state without being displaced in a state where the paper diaper main body 10 is firmly attached to the body. In this example, only the front and rear end portions 18 and 19 of the paper diaper main body 10 are bonded, but the point is that the paper diaper main body 10 and the exterior sheet 20 are not bonded at least in the crotch region. You may make it adhere | attach at the several location part of F and back body B. FIG.
[0039]
In addition, the longitudinal bonding position of the paper diaper main body 10 is preferably such that the distance J from the lower end of the waist elastic elastic members 21, 21... To the front and rear edges of the paper diaper main body 10 is 20 mm or more. If the distance J is less than 20 mm, the elastic force exerted by the waist elastic elastic members 21, 21, etc. reaches the front and rear ends of the paper diaper main body 10, and the absorbent main body 13 of the paper diaper main body 10 is wrinkled and contracted. Will occur and the appearance will be impaired.
[0040]
When the paper diaper main body 10 is fixed to the exterior sheet 20, the exterior sheet 20 is folded back and forth at the center folding line K, and the side edges 4 portions excluding the leg openings 2 and 2 (hereinafter referred to as the joining side). The trunks-type disposable paper diaper 1 shown in FIG. 1 is assembled by joining the edges together) by heat welding or hot melt adhesive. The trunks-type disposable paper diaper 1 is a paper diaper having a substantially hexagonal shape in a front view in which leg openings 2 and 2 are formed obliquely downward as shown in FIG. As shown, the waist opening 3 is widened to have a substantially base plate shape.
[0041]
In FIG. 1 which shows a product state, that is, a no-load state, in the disposable disposable diaper 1, a horizontal line M (actually a waist part) connecting the one upper end P of the waist opening 3 and the other upper end O in front view. Since the opening 3 is slightly curved and thus defined), the angle θ formed by the joining side edge 4 where the front body F and the back body B are joined is 45 ° or less, and the leg openings 2 and 2 The diaper longitudinal dimension L is preferably 15 cm or more.
[0042]
When the inclination angle θ of the joint side edge 4 exceeds 45 °, the joint side edge 4 is constrained by the foot when the foot is passed during wearing, and it becomes difficult to wear. Moreover, when the diaper longitudinal direction dimension L of the leg part opening 2 and 2 is less than 15 cm, it is hard to pass a leg | foot and it is inferior to a wearing feeling in a wearing condition.
[0043]
Further, in the case of the disposable disposable diaper, the elastic elastic members around the legs are disposed along the conventional legs and at the crotch, and the elastic elastic members around the legs are eliminated. This makes it possible to eliminate stiffening and shrinkage of the absorber due to the contraction force of the rubber at the same time, thereby eliminating the feeling of sticking and improving the feeling of wearing. In addition, it is possible to prevent a situation where urine leaks out of a groove or a wrinkle caused by the contraction of the absorber. Furthermore, appearance is improved by eliminating the elastic elastic member that crosses the crotch portion.
[0044]
【The invention's effect】
As described above, according to the present invention, it is possible to obtain a disposable diaper having a trunk-like appearance without causing an increase in the number of parts and without complicating the conventional manufacturing process. In particular, by prescribing the shape of the product state, it is easy to pass the foot at the time of wearing, the ease of wearing is greatly improved, and the feeling of wearing is also excellent. Furthermore, in the crotch region, the paper diaper body and the exterior sheet are not joined and preferably separated from each other, so that the paper diaper body does not move following the movement of the exterior sheet, and the paper diaper body is always in a good state. It comes to be installed with.
[Brief description of the drawings]
FIG. 1 is a front view of a trunks-type disposable paper diaper according to the present invention in an unloaded state.
FIG. 2 is a front view showing a state in which a waist opening is extended to the side.
FIG. 3 is a view taken along the line III-III in FIG. 1;
FIG. 4 is an assembly diagram of a paper diaper main body 10 and an exterior sheet 20;
FIG. 5 is a plan view of the disposable diaper main body 10;
6 is a view taken in the direction of arrows VI-VI in FIG. 5;
7 is a view taken along line VII-VII in FIG.
FIG. 8 is a development view showing a conventional pants-type paper diaper.
FIG. 9 is a product state perspective view of a conventional pants-type disposable paper diaper.
10 is a perspective view of a trunks-type disposable paper diaper according to Conventional Example 1. FIG.
11 is a front view of a trunks-type disposable paper diaper according to Conventional Example 2. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Trunks type disposable paper diaper, 2 ... Leg part opening, 3 ... Waist part opening, 4 ... Joint side edge, 10 ... Paper diaper main body, 11 ... Liquid-permeable top sheet, 12 ... Waterproof film, 13 ... Absorber body, 13A ... Lower absorbent body, 13B ... Upper absorbent body, 14A and 14B ... Creep paper, 15 ... Elastic elastic member, 20 ... Exterior sheet, 21 ... Lumbar elastic elastic member, 22 ... Reinforcing nonwoven fabric, B ... Three-dimensional gather

Claims (2)

A paper diaper main body in which an absorber is interposed inside a liquid-permeable top sheet covering the use side and a waterproof film covering the back side;
Folded crotch section as a folded line, and the front body and the back body are joined at the side edges except for the leg openings, and on the upper side and has a waist opening, the waist resilient and elastic members along a circumferential direction only It is composed of an exterior sheet formed into a trunks shape having a substantially hexagonal shape in a front view in which the leg opening is formed obliquely downward in a product state,
The paper diaper main body is disposed in a range over the back body through the crotch portion from the front body on the inner surface side of the outer sheet Rutotomoni, front body and back body of the waterproof film plane outer sheet of the front and rear end regions Are adhered to each other, at least in the crotch region is not adhered to the exterior sheet,
The distance between the front and rear end edges of the disposable diaper body and the lower end of the elastic elastic member disposed around the waist opening is 20 mm or more, and connects the upper end on one side and the upper end on the other side of the waist opening. An angle formed by a horizontal line and a joint line formed by joining the front body and the back body at both side edges excluding the leg opening is 45 ° or less, and the length of the leg diaper in the longitudinal direction Disposable disposable diapers characterized by having a length of 15 cm or more . The paper diaper main body, in the crotch region, the disposable diapers of claim 1 having at least 5mm or more apart from the outer sheet.

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