JP3878367B2 - Pants-type disposable paper diapers - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a pants-type disposable paper diaper that eliminates a feeling of sticking due to an absorber in the crotch part and reliably prevents side leakage from the crotch part.
[0002]
[Prior art]
Conventionally, underwear disposable diapers are marketed together with tape-type disposable paper diapers for the purpose of facilitating diaper separation or freeing adults from wearing work with fastening tape each time 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 51 is provided on the outer surface side of the paper diaper main body 50 including the liquid-impervious back sheet 53 made of and an absorbent body 54 interposed between the two 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 first leg elastic member 61, ... and a second elastic elastic member 62, which seal the leg part, are provided. The leg elastic first elastic elastic member 61,... Is provided with 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. The leg elastic second elastic elastic members 62,... Are arranged continuously from the rear body B end of one leg around the crotch to the rear body B end of 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 integrated by adhering and fixing almost the entire surface of the liquid-impermeable back sheet 53 to the front surface back sheet 55 of the main body back sheet 51 by a hot melt adhesive. The above-mentioned paper diaper is formed into a pants shape by overlapping the front body F and the back body B on a folding line L in the substantially center, and joining both side edges to a welding method such as ultrasonic welding.
[0006]
[Problems to be solved by the invention]
However, in the case of the above-described pants-type disposable paper diaper, strong contractive force due to the first elastic elastic members 61,... And the second elastic elastic members 62,. Therefore, the absorbent body 54 is contracted in the width direction of the paper diaper, and the wearer feels an unpleasant feeling in the crotch portion, and urine and the like are generated from the grooves and wrinkles in the width direction generated by the contraction of the absorbent body 54. There were problems such as leakage.
[0007]
In addition, since the compacted shape of the absorber 54 appears exactly on the outer surface of the paper diaper, there is a problem that the appearance of the product is deteriorated.
[0008]
Therefore, a main problem of the present invention is to eliminate the wrinkles of the absorbent body in the crotch part, reliably prevent side leakage from the crotch part, and further improve the appearance in the pants-type disposable paper diaper.
[0009]
[Means for Solving the Problems]
The present invention for solving the above problems is a paper diaper body including a semi-rigid absorber, an inner backsheet nonwoven fabric and an outer backsheet nonwoven fabric, which are integrally provided on the outer surface side of the paper diaper main body. A backsheet nonwoven fabric for the inner surface and a backsheet nonwoven fabric for the outer surface, and continuous from the front body end around one leg to the front body end around the other leg. 1 or a plurality of leg-surrounding first elastic elastic members disposed in a row, and one or a plurality of leg-surrounding members continuously disposed from the rear body end of one leg around the crotch to the rear body end of the other leg and fixing the plurality of leg second resilient and elastic members, there a product state front body and the back body of the body backsheet in pants-type disposable diapers in which the pants-type by bonding at both sides thereof ,
The paper diaper main body is non-adhered to the main body back sheet in the crotch region where the leg elastic first elastic elastic member and the leg elastic second elastic elastic member cross the absorber disposition site, and all other regions Alternatively, it is characterized in that it is partly bonded and integrated with an adhesive.
[0010]
In this case, the non-adhesive region of the paper diaper main body in the crotch region is such that the first leg elastic elastic member and the second leg elastic elastic member are continuous along the leg line of the paper diaper, and the width of the paper diaper in the crotch region. It is desirable that the region include an inflection point whose direction is changed in the direction.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
1 to 5 show an example of the structure of a pants-type disposable diaper according to the present invention. FIG. 1 is a developed view, and FIGS. 2 and 3 are views taken along line II-II and line III-III in FIG. It is an arrow view. In addition, in the required location of drawing, the adhesion | attachment site | part is clearly indicated by x mark.
[0012]
As clearly shown in the figure, this pant-type paper diaper is composed of a liquid-permeable top sheet 11 made of nonwoven fabric and a liquid-impervious back sheet 12 made of polyethylene or the like, and an absorbent body made of cotton pulp or the like. 13 is a paper diaper having a structure in which a main body back sheet 20 is integrally provided on an outer surface side of a main body 10 having a structure including 13.
[0013]
The absorbent body 13 includes an hourglass-shaped upper absorbent body 13A having a wide area and a rectangular lower absorbent body 13B having a slightly narrow area, which are surrounded by crepe paper 13C and 13D, and are deformed as a whole. It has a semi-rigid property, and a powdery polymer absorbing polymer is contained inside the upper absorbent body 13A and the lower absorbent body 13B.
[0014]
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 liquid-impermeable back sheet 12 is also hot-melt bonded to the lower surface of the absorbent body 13. The paper diaper main body 10 is configured by being fixed by an agent.
[0015]
A main body back sheet 20 is integrally provided on the outer surface side of the paper diaper main body 10. The main body backsheet 20 is formed by bonding an inner backsheet nonwoven fabric 22 and an outer backsheet nonwoven fabric 21 with a hot-melt adhesive, and has an outer shape that is larger than that of the paper diaper main body 10 so as to form a flap portion around it. It is large and has a pseudo hourglass shape as a whole.
[0016]
Various functions are provided between the inner backsheet nonwoven fabric 22 and the outer backsheet nonwoven fabric 21 constituting the main body backsheet 20 in order to fit a paper diaper to the wearer and prevent leakage of urine and feces. These elastic elastic members are interposed and fixed by a hot melt adhesive.
[0017]
Specifically, in the developed shape shown in FIG. 1, the opening part of the front body F and the opening part of the back body B are made of, for example, rubber bands. , 24... Are provided.
[0018]
Further, a plurality of, for example, five abdominal elastic elastic members 25, 25... Made of rubber thread are provided along the lateral direction at a position corresponding to the abdomen of the front body F, and both ends correspond to the abdomen. In the illustrated example, a plurality of elastic elastic members 26, 26,... For lifting the front body are provided, which are made of thread rubber having a shape located at a location and having a central portion bulging toward the crotch side. Further, in the buttock portion corresponding to the abdomen corresponding portion of the back body B, a plurality of, for example, six heel elastic elastic members 27, 27,. Yes.
[0019]
On the other hand, at the leg portion, one or a plurality of, in the illustrated example, three leg-hole elastic members for sealing the leg portion are provided. Various arrangements of these leg-hole elastic members can be considered. However, in the arrangement aspect targeted by the present invention, the leg-hole elastic members are arranged across the absorber in the crotch region. It is an arrangement mode. Specifically, in the illustrated example, one or a plurality of arrangement modes continuously arranged from the front body F end around one leg to the front body F end around the other leg from the front body F end around the other leg. The first elastic elastic members 28, 28... Of the three legs, and the rear body B end of one leg from the B body end to the crotch, are continuously disposed to the rear body B end of the other leg. In the illustrated example, a plurality of second leg elastic elastic members 29, 29,...
[0020]
As shown in FIG. 4, the main body back sheet 20 and the paper diaper main body 10 are configured such that the first leg elastic first elastic members 28, 28... And the second leg elastic elastic members 29 29 29 cross the paper diaper main body 10. In the crotch region R, it is integrated with the main body back sheet 20 in a non-bonded state, that is, an adhesive such as hot melt in all or part of the other region (shaded region S) excluding the crotch region R Are bonded and integrated. The leg elastic first elastic elastic member 28 is formed by non-adhering the paper diaper main body 10 and the main body back sheet 20 in the crotch portion where the elastic elastic members 28. , 28... And the contraction force due to the second elastic elastic members 29, 29... Are not directly introduced into the disposable diaper body 10, and the shrinkage of the absorbent body 13 in the width direction is greatly relieved. Become. As a result, the wearer does not feel the crotch part with a wrinkle, the wearability is improved, and the occurrence of wrinkles and grooves due to shrinkage is suppressed, so that side leakage from the crotch part can be effectively prevented. become. Also, the appearance of the paper diaper is also good because the shrinkage of the absorbent body 13 does not appear on the outer surface of the paper diaper.
[0021]
By the way, as a method of preventing the paper diaper main body 10 from being contracted, a method of reducing the tension of the first leg elastic first elastic members 28, 28... And the second leg elastic members 29, 29. However, in the case of this method, since the design change of the production line is required, for example, it is necessary to change the structure of the elastic stretchable member attaching device itself, the capital investment due to this becomes a heavy burden. With this method, it is possible to easily prevent the absorber from shrinking and obtain the above-described effects.
[0022]
In this case, the non-bonding region between the paper diaper main body 10 and the main body back sheet 20 is such that the first leg elastic elastic members 28, 28... And the second elastic elastic members 29 29 29. It is desirable that the region includes an inflection point P that is continuous along the crotch and is turned in the width direction of the disposable diaper. Of the continuous lines of the first leg elastic members 28, 28 ... and the second leg elastic members 29, 29 ..., the line portion including the inflection point P and extending in the width direction of the absorber extends from the adhesive region. By removing, the contraction force introduced into the absorbent body 13 can be effectively reduced.
[0023]
On the other hand, side barrier cuffs 30, 30 are provided on both sides of the surface of the product. These side barrier cuffs 30 and 30 are preferably made of a material that exhibits liquid impermeability or water repellency.
[0024]
As shown in FIG. 2, the side barrier cuff 30 extends outward from the side edge of the upper side absorbent body 13A from the side edge of the paper diaper main body 10, that is, the side edges of the absorbent bodies 13A and 13B. The section from the crepe paper 13C, 13D to the side edge of the liquid-impervious backsheet 12 beyond the side joints is fixed with hot-melt adhesive, and the tip of the inner sheet portion that is not bonded In addition to being folded back, one or more, in the illustrated example, one elastic elastic member 31 for the first standing is disposed inside, and the front and rear end portions of the inner sheet portion are formed on the liquid-permeable top sheet 11. On the other hand, it is fixed by a hot melt adhesive. As a result, the front and rear end portions of the first standing elastic elastic member 31 are restrained by the paper diaper main body 10, and as a result, only the middle portion becomes a free end in the use state of the product, and the first standing elastic elastic member 31. first erected towards the inside of the product along with the shrinkage force of constituting a barrier cuff B _1.
[0025]
Similarly, one end of the non-adhered outer sheet portion is folded back twice, and one or more, in the illustrated example, one second elastic elastic member 32 for standing is disposed therein. And, as a result of the inner surface of the outer sheet portion being fixed to the paper diaper main body 10 side at the front and rear end portions thereof, only the middle portion thereof becomes a free end in the use state of the product, and the second elastic elastic member for standing up with the 32 contractile force constitutes the second barrier cuffs B ₂ erected towards the inside of the product. If, urine or feces is adapted to prevent even leaking to the outside reliably blocked urine or feces by a second barrier cuff B ₂ as exceeding the first barrier cuff B _1.
[0026]
If the paper diaper having such a structure is manufactured, as shown in FIG. 5, the main body back sheet 20 is folded in the front-rear direction along the folding line L, and both sides thereof are mutually welded by heat welding or hot melt adhesive. A pants-type paper diaper is assembled by joining.
[0027]
In the case of this pants-type disposable diaper, since the main body back sheet 20 exhibits elasticity as a whole, the entire main body back sheet 20 fits so as to tighten the body when worn, so that the wearer does intense exercise and unreasonable posture. Even if it takes, the absorber main body 13 does not leave | separate from skin, but comes to stick to a body always.
[0028]
Note that the side barrier cuff 30 is double in this example, but may be single. In the configuration of the present invention, the elasticity of the legs is included in the elastic elastic member disposed on the main body backsheet 20. The elastic elastic members other than the elastic members 28 and 29 may be arranged in any manner.
[0029]
【The invention's effect】
As described above in detail, according to the present invention, in the pants-type disposable paper diaper, it becomes possible to eliminate the shrinkage in the width direction of the absorbent body in the crotch portion, so that the wearer feels the feeling of the absorbent body in the crotch region. This eliminates the problem and improves the feeling of wearing. In addition, by eliminating the shrinkage of the absorber, large wrinkles and grooves are not formed, so that side leakage from the crotch portion can be reliably prevented. Furthermore, the appearance can be improved.
[Brief description of the drawings]
FIG. 1 is a development view of a pants-type paper diaper according to the present invention.
FIG. 2 is a view taken along the line II-II in FIG.
FIG. 3 is a view taken along the line III-III in FIG. 1;
FIG. 4 is a perspective view of a procedure for bonding a paper diaper main body 10 to a main body back sheet 20;
FIG. 5 is a product state perspective view of the present pants-type paper diaper.
FIG. 6 is a development view showing a conventional pants-type paper diaper.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Paper diaper main body, 11 ... Liquid-permeable top sheet, 12 ... Liquid-impermeable back sheet, 13 ... Absorber main body, 13A ... Upper side absorber, 13B ... Lower side absorber, 13C * 13D ... Crepe paper, 20 ... Main body backsheet, 21 ... backsheet nonwoven fabric for outer surface, 22 ... backsheet nonwoven fabric for inner surface, 23.24 ... waist elastic elastic member, 25 ... abdominal elastic elastic member, 26 ... elastic elastic member for lifting front body, 27 ... buttocks Elastic elastic members, 28 ... first elastic elastic members around the legs, 29 ... second elastic elastic members around the legs, 30 ... side barrier cuffs, 31 ... first elastic elastic members for standing, 32 ... second elastic elastic members for standing, B 1 _... first barrier cuffs, B 2 _... second barrier cuffs, R ... crotch region

Claims (2)

A paper diaper body including an absorber of semi-rigid, bonding the backsheet nonwoven for inner surface backsheet nonwoven fabric and an outer surface, composed of a main body back sheet integrally provided on the outer surface side of the paper diaper main body, said inner surface for back One or a plurality of leg circumferences arranged continuously between the sheet nonwoven fabric and the outer backsheet nonwoven fabric around at least one leg from the front body end around the crotch part to the front body end around the other leg A first elastic elastic member, and one or more leg elastic second elastic elastic members arranged continuously from the rear body end of one leg around the crotch to the rear body end of the other leg A pants-type disposable paper diaper that is fixed and made into a pants-type by joining the front and back bodies of the main body backsheet in the product state on both sides thereof,
The paper diaper main body is non-adhered to the main body back sheet in the crotch region where the leg elastic first elastic elastic member and the leg elastic second elastic elastic member cross the absorber disposition site, and all other regions Alternatively, a pants-type disposable paper diaper characterized in that it is partly bonded and integrated with an adhesive. The non-adhesive region of the paper diaper main body in the crotch region is such that the first leg elastic elastic member and the second leg elastic elastic member are continuous along the leg line of the paper diaper, and are oriented in the width direction of the paper diaper in the crotch region. 2. The pants-type disposable paper diaper according to claim 1, wherein the pants-type disposable paper diaper is a region including an inflection point being changed.

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