JP2002165832A - Paper diaper - Google Patents

Paper diaper

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Publication number
JP2002165832A
JP2002165832A JP2000364748A JP2000364748A JP2002165832A JP 2002165832 A JP2002165832 A JP 2002165832A JP 2000364748 A JP2000364748 A JP 2000364748A JP 2000364748 A JP2000364748 A JP 2000364748A JP 2002165832 A JP2002165832 A JP 2002165832A
Authority
JP
Japan
Prior art keywords
disposable diaper
dimensional gather
diaper according
provided
leak
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP2000364748A
Other languages
Japanese (ja)
Inventor
Toshio Muranaka
俊夫 村中
Original Assignee
Daio Paper Corp
Daioo Paper Converting Kk
ダイオーペーパーコンバーティング株式会社
大王製紙株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
Application filed by Daio Paper Corp, Daioo Paper Converting Kk, ダイオーペーパーコンバーティング株式会社, 大王製紙株式会社 filed Critical Daio Paper Corp
Priority to JP2000364748A priority Critical patent/JP2002165832A/en
Publication of JP2002165832A publication Critical patent/JP2002165832A/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=18835635&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JP2002165832(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Pending legal-status Critical Current

Links

Abstract

PROBLEM TO BE SOLVED: To prevent the exudation of body fluid from three-dimensional gathers. SOLUTION: This paper diaper has a back sheet 2 and a main absorbing body 1 and mounting this back sheet 2 is formed with the three-dimensional gathers 3 abutting on the girth of the leg. The three-dimensional gathers 3 exist in the positions where the gathers are partly visually recognized from the apertures at the girth of the leg in a wearing state and these three- dimensional gathers are provided with a leakage preventing means for preventing the leakage of the body fluid, by which the exudation of the body fluid to an outer side through the three-dimensional gathers 3 is prevented even if the body fluid (for example, urine) accumulates in the three-dimensional gathers 3 or the adhered segments of the three-dimensional gathers 3 when a user discharges urine in an unnatural posture.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper capable of preventing oozing of bodily fluids from three-dimensional gathers.

[0002]

2. Description of the Related Art Generally, disposable disposable diapers are
As shown in FIGS. 22 to 25, the back sheet 2 includes a liquid-impermeable back sheet 2 located on the side opposite to the wearer, and an absorbent body 1 fixed to the inner surface of the back sheet 2. Are formed on both sides of the vehicle. The absorbent main body 1 is made of a nonwoven fabric or the like, and has a rectangular liquid-permeable top sheet 11 that directly touches the wearer's skin, a rectangular absorbent body 12 having a certain degree of rigidity, and a back surface of the absorbent body 12. A rectangular liquid-impervious waterproof sheet 13 wrapping around the front side and covering both sides on the front side in a forehead form is bonded and integrated with a hot melt adhesive HM. Reference numeral 14 denotes a liquid-permeable second sheet provided between the top sheet 11 and the absorber 12, and reference numeral 15 denotes a liquid-permeable clave paper surrounding the absorber 12.

[0003] As shown in FIG. 23, the three-dimensional gather 3 overlaps the nonwoven fabric 31 doubly, sandwiches elastic members 32 made of thread rubber or the like between the overlapping portions, and forms upper and lower portions of the overlapping portion. 24 is bonded with a hot-melt adhesive HM, or as shown in FIG. 24, a folded portion for holding an elastic body 32 made of thread rubber or the like is formed at the upper end of the nonwoven fabric 31. . The three-dimensional gather 3 shown in FIG. 23 includes an upright portion 3a that goes from the upright end attached to the back sheet 2 to the center, and a flat contact portion 3b that is turned upside down from the end of the upright portion 3a and turns outward.
And functionally and conceptually.

[0004]

However, in the case of the conventional three-dimensional gather configured as described above, since it is made of a non-woven fabric having a barrier property but not absorbing, it is difficult to urinate in an unnatural posture. Then, urine may accumulate at the joint between the three-dimensional gather and the absorption main body. Then, there is a possibility that urine may leak through the three-dimensional gathers.

Also, in a pants-type disposable diaper,
In order to emphasize the quality of pants, the three-dimensional gather,
In the diaper of such a type, a part that can be visually recognized from the opening of the undercarriage in the attached state and the free end play from the bonding position is reduced has been developed. Since the gathered portion of the gathers is exposed from the outside, a structure for preventing leakage of body fluid is required.

The present invention has been made in view of the above points, and has as its object to prevent oozing of bodily fluid from a three-dimensional gather portion.

[0007]

According to the first aspect of the present invention, as a means for solving the above-mentioned problems, a back sheet and an absorbing body are provided, and the back sheet is provided with a three-dimensional gather which comes into contact with the underbody. In the disposable diaper
The three-dimensional gather is located at a position where a part of the three-dimensional gather can be visually recognized from an opening around the underbody, and a leak-proof means for preventing seepage of body fluid is provided.

[0008] With the above-described structure, even if bodily fluid (eg, urine) accumulates in the three-dimensional gathers or the bonded portion of the three-dimensional gathers when urinating in an unnatural posture, the bodily fluids can be discharged through the three-dimensional gathers. No more seeping out. Therefore, it is possible to maintain the comfort and cleanliness of the portion visible from the underbody opening in the mounted state for a long time.

As in the invention of claim 2, claim 1
In the disposable diaper described above, when the underbody portion of the back sheet is configured such that play at the free end from the bonding position is reduced, the underbody opening is refreshing to emphasize the pants-like nature, but the three-dimensional gathers Is provided with a leak-proof means, so that oozing of bodily fluids is eliminated,
Cleanliness can be maintained for a long time.

[0010] As in the invention of claim 3, claim 1
3. In the disposable diaper according to any one of 2 and 2, when the nonwoven fabric forming the three-dimensional gather is overlapped three or more times, and the three-dimensional gather itself is provided with a function as a leak-proof means, the nonwoven fabric is overlapped three or more times. With such a simple structure, the bleeding of the body fluid from the three-dimensional gather can be prevented, and the cost is not much different from the conventional one.

As in the invention of claim 4, claim 3
In the disposable diaper according to the above, when the overlapping region of the nonwoven fabric in the three-dimensional gather is bonded with a hot melt adhesive, the hot melt adhesive bonding the overlapping region of the nonwoven fabric also contributes to the improvement of the leakproofness of the three-dimensional gather. From this point, the leakproofness is further improved.

According to a fifth aspect of the present invention, in the disposable diaper according to any one of the first to third aspects, a waterproof sheet is interposed between the absorbent body and the back sheet, and the waterproof sheet is provided. In the case where the sheet is extended in the three-dimensional gather and the leak-proof means is constituted by the waterproof and extending portion, the leak-proof means is formed by extending the waterproof sheet constituting a part of the absorption main body. It can be configured, and the cost is not much different from the conventional one. The disposable diaper according to the third aspect of the present invention is the same as the fifth aspect.
When the invention of (1) is applied, it is possible to further improve leakage prevention.

[0013] As in the sixth aspect of the present invention, in the disposable diaper according to any one of the first, second and third aspects, a retaining space in which bodily fluids can reside is provided in the three-dimensional gather, and the retaining space is provided by the retaining space. When the leak-proof means is configured, the leak-proof means can be configured only by forming a stay space in the three-dimensional gather, and the cost is not much different from the conventional one. When the invention of claim 6 is applied to the disposable diaper according to the invention of claim 3,
It is possible to further improve leakage prevention.

As in the invention of claim 7, claim 6
In the disposable diaper described in the above, in the case where an absorbent member for absorbing and holding bodily fluid is provided in the staying space, and the leak preventing means is constituted by the absorbing member, the bodily fluid is absorbed and held by the absorbing member, and the The properties are further improved.

As in the invention of claim 8, in the disposable diaper according to any one of claims 1, 2, 3, 4, 5, 6, and 7, a water-repellent ink is provided on a side of the three-dimensional gather opposite to a wearer. In the case of forming the coating layer by applying the above, the leak-proof means is configured by the coating layer, on the anti-wearer side surface in the three-dimensional gather, just by applying a water-repellent ink to form a coating layer,
Leak prevention means can be configured, and the cost is not much different from the conventional one. In addition, Claim 3,
The disposable diaper according to the inventions of 4, 5, 6 and 7 is claim 8.
When the invention of (1) is applied, it is possible to further improve leakage prevention.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Some preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

First Embodiment FIGS. 1 to 5 show a disposable diaper according to a first embodiment of the present invention and a manufacturing procedure thereof.

This disposable diaper is of a pants type, and has a liquid-impervious back sheet 2 located on the side opposite to the wearer and an inner surface of the back sheet 2 as described in the section of the prior art. It is provided with the absorption main body 1 to be fixed. On both sides of the back sheet 2, three-dimensional gathers 3, 3 for the underbody that protrude toward the wearer are attached (see FIG. 22).

The absorbent body 1 is made of a non-woven fabric or the like.
A rectangular liquid permeable top sheet 11 that directly touches the wearer's skin, a rectangular absorber 12 having a certain degree of rigidity, The rectangular liquid-impervious waterproof sheet 13 covering in a forehead form is used as a hot melt adhesive HM.
It is said that it is bonded and integrated. The absorbent 12 is preferably composed mainly of fibrillated pulp and used in combination with a high-molecular-weight absorbent polymer, and is provided in a form of being wrapped around crepe paper 15. Reference numeral 14 denotes a liquid-permeable second sheet interposed between the top sheet 11 and the absorber 12 as necessary.

The back sheet 2 is formed by laminating and fixing two air-permeable and liquid-impervious non-woven fabrics.
At the final stage of the manufacturing process after the superimposition of the main body 1 and the absorption main body 1, both side edges of the front body and the rear body are joined by joining means such as ultrasonic sealing or heat melting (this joint is shown in FIG. 21). FIG. 2 is shown in FIG.
As shown in FIG. 2, a waist opening 40 and a pair of left and right underbody openings 50, 50 are formed.

Here, at least regarding the crotch portion Y,
The width of the back sheet 2 is set to be equal to or less than the width of the absorber 12, whereby the rims 50a, 50a of the underbody openings 50, 50 can emphasize the likeness of pants.
It has a linear shape without frills. In order to manufacture such a disposable diaper, the rim 50 of the underbody openings 50, 50 is required for the continuous body of the back sheet 2 defining the outer shape of the diaper.
After the cuts a and 50a are performed, the absorber 12 or the absorber accommodating portion 12a including the absorber is laminated. When removing the disposable diaper, the joints 21 and 21 are forcibly torn apart instead of being peeled off, so that the disposable diaper is removed as shown in FIG. This facilitates the treatment of excrement.

The absorbent main body 1 is bonded and integrated with the back sheet 2 with a hot melt adhesive HM over substantially the entire back surface except for a small amount of both sides of the waterproof sheet 13.

In the present embodiment, as shown in FIG. 1, the three-dimensional gathers 3 are formed by overlapping non-woven fabrics 31 in a triple manner, and the elastically stretchable members 3 made of thread rubber or the like are provided at the overlapping portions.
, The upper and lower portions of the overlapped portion are bonded with a hot melt adhesive HM, and an upright portion 3a extending from the upright end attached to the back sheet 2 to the center portion; 3a is functionally and conceptually divided into a flat portion 3b which is folded back from the end of the end 3a and turned outward.

That is, in the present embodiment, the three-dimensional gathers 3 formed by stacking the nonwoven fabrics 31 in three or more layers function as leak-proof means for preventing oozing of body fluids. is there. Therefore, the nonwoven fabric 3
With a simple structure in which 1 is overlapped three times, it is possible to prevent oozing of body fluid from the three-dimensional gather 3, and the cost is not much different from the conventional one.

Next, a method of manufacturing a three-dimensional gather in a disposable diaper according to the present embodiment will be described with reference to FIGS.

In the present embodiment, the three-dimensional gather 3
Is manufactured using the sailing mold 6 shown in FIG. The sailing mold 6 has V-shaped processing portions 62a, 6 for superimposing the nonwoven fabrics 31, 31 with guide dies 61, 61 for guiding the nonwoven fabrics 31, 31 constituting the three-dimensional gather 3.
2a, and ends of the nonwoven fabrics 31, 31 are folded back and overlapped by the processing portions 62a, 62a in the molding dies 62, 62 as shown by a chain line (in other words, If sailing).

For example, when the nonwoven fabric 31 is supplied to the sailing mold 6 as shown in FIG. 3A, the end of the nonwoven fabric 31 is folded back as shown in FIG. 3B and FIG. The overlapping portion 31a is formed. Then, FIG.
As shown in FIG. 5 (c) and FIG. 5 (b), elastic elastic members 32, 32,..., Such as thread rubber, are supplied to the overlapping portion 31a by being guided by the guide plate 7, and are mounted by gluing or the like. After being fixed, it is supplied to another sailing mold 6. Then, as shown in FIGS. 3 (d) and 5 (c), the overlapping portion 31a is folded to form a triple overlapping portion 31b.
As shown in (e), it is turned upside down, and in that state, as shown in FIG. 3 (f) and FIG. Then, three-dimensional gather 3
Is adhered and fixed to the product as shown in FIG.

That is, in the present embodiment, the triple overlapping portion 31b is formed on the nonwoven fabric 31 by the two sailing dies 6, 6 arranged side by side in the flow direction of the nonwoven fabric 31. is there.

On the other hand, a conventional three-dimensional gather having a double overlapping portion is manufactured as follows.

That is, as shown in FIG. 25A, elastic bodies 32, 32,..., Such as thread rubber, are mounted on appropriate positions of the nonwoven fabric 31 (for example, positions where the overlapping portions 31a are to be formed) by gluing. When the nonwoven fabric 31 is placed and fixed and supplied to the sailing mold 6, the end of the nonwoven fabric 31 is folded back to form an overlapped portion 31a, as shown in FIG. Then
As shown in FIG. 25 (C), it is turned upside down, and in that state, it is formed into the shape of the three-dimensional gathers 3 as shown in FIG. 25 (D).

That is, in the conventional method, the double overlapping portion 31a is formed on the nonwoven fabric 31 by one sailing mold 6.

As described above, in the case of this embodiment,
Compared with the conventional case, it is possible to form the three-dimensional gathers 3 having high leak-proof property only by adding a sailing process using another sailing mold 6 to the conventional method. Therefore, the cost is not so different from the conventional one.

The three-dimensional gathers in the disposable diaper according to the present embodiment can be manufactured by another manufacturing method shown in FIG.

That is, as shown in FIG. 6A, when the nonwoven fabric 31 coated with the hot-melt adhesive HM for bag binding in a predetermined position in advance is supplied to the sailing mold, FIG.
As shown in (2), the end of the nonwoven fabric 31 is folded back, and the end is bonded to the hot-melt adhesive HM for bag binding to form the overlapped portion 31a. Next, as shown in FIG. 6C, at a predetermined position on the overlapping portion 31a (that is,
Elastic elastic members 32, 32... Such as thread rubber are supplied to the side close to the hot-melt adhesive HM for bag binding, and are placed and fixed by gluing or the like, and then supplied to another sailing mold. You. Then, as shown in FIG.
Elastic elastic members 32, 3 in the overlapping portion 31a
6 are folded back to form a triple overlap 31b, which is shown in FIG.
As shown in FIG. 6 (e), it is turned upside down, and in that state, as shown in FIG. Thereafter, the three-dimensional gathers 3 are bonded and fixed to the product as shown in FIG.

That is, also in the present embodiment, a triple overlapping portion 31b is formed on the nonwoven fabric 31 by the two sailing dies arranged side by side in the flow direction of the nonwoven fabric 31.

Incidentally, the sheets constituting the back sheet 1 and the three-dimensional gather 3 are preferably water-repellent non-woven fabrics. A sheet formed by a direct method represented by a melt blown method or a spun bond method and made of polypropylene, polyethylene terephthalate, or nylon fibers can be suitably used. The sheet may be formed by spot bonding with heat or an adhesive, water flow, a needle, or the like by a wet method, a dry method (air lay method or card method), a spunlace method, or the like in which short fibers are bonded. In addition, a nonwoven fabric made of a composite fiber having a core / shell or side-by-side structure can also be used. Examples of the composite fiber include polyethylene terephthalate / polyethylene, polypropylene / polyethylene, and polypropylene / polypropylene. In particular, the three-dimensional gathering sheet has a water pressure resistance of 50 mmH 2 O or more, preferably 100 mm, according to the method defined by the JIS method (L-1092) in order to improve leakage prevention.
H 2 O or more, more preferably sheet preferably exhibits a more 150mmH 2 O. For example, SMS (spunbond /
Melt blow / spun bond), SM (spun bond /
Sheets that are combined in a layered form, such as melt blow) and SMMS (spun bond / melt blow / melt blow / spun bond), are suitably employed.

The top sheet 11 and the second sheet 14 may be made of a hydrophilic nonwoven fabric, specifically, cellulose fibers such as cotton and rayon, synthetic fibers having a hydrophilic group such as acrylonitrile and polyvinyl alcohol, and the like. Fibers and the like which have been made hydrophilic by imparting hydrophilicity to hydrophobic fibers such as polyethylene, polypropylene and polyester by a hydrophilic agent are used.

As the above-mentioned hydrophilizing agent, various surfactants can be used, and are not particularly limited as long as they are hydrophilic surfactants having a lipophilic group and a hydrophilic group. A nonionic surfactant to which an appropriate number of moles of an oxide is added is desirable. For example, alkyl ether sulfate, sulfosuccinate, polyoxyethylene alkyl ether, polyoxyethylene alkylphenol ether, glycerin fatty acid ester and the like can be mentioned.

Examples of the high-molecular-weight water-absorbing polymer constituting the absorber 12 include a starch-acrylic acid copolymer cross-linked product, a polyacrylate cross-linked product, a self-cross-linked polyacrylate, and an acrylate-vinyl acetate. Examples include saponified copolymers, isobutylene, crosslinked maleic anhydride copolymers, crosslinked polysulfonates, modified cellulose derivatives, crosslinked polyethylene oxide, and the like. Preferably, a large amount of liquid is absorbed by the ion osmotic pressure.
A sodium polyacrylate-based resin which can hold the acrylate and / or acrylic acid as a main monomer component of the polymer, which is capable of holding and has a small water separation even when a load or external force is applied, is suitable.

As the waterproof sheet 13, a sheet material having at least water-blocking properties, such as polyethylene and polypropylene, is used. In recent years, a sheet having moisture permeability from the viewpoint of preventing stuffiness tends to be suitably used. The water-permeable and moisture-permeable sheet material is, for example, a microporous material obtained by kneading an inorganic filler in an olefin resin such as polyethylene or polypropylene to form a sheet, and then stretching the sheet uniaxially or biaxially. Sheets are preferably used. The waterproof sheet 12 may be configured to also serve as a back sheet that forms an outer surface that covers the back side of the absorber 12.

Second Embodiment FIG. 7 shows a main part of a disposable diaper according to a second embodiment of the present invention.

In this case, the entire area of the triple overlapping portion 31b of the nonwoven fabric 31 in the three-dimensional gather 3 is adhered by the hot melt adhesive HM. This way,
The hot-melt adhesive HM bonding the entire area of the overlapping portion 31B of the nonwoven fabric 31 also contributes to the improvement of the leak-proof property of the three-dimensional gather 3, so that the leak-proof property is further improved. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

Third Embodiment FIG. 8 shows a main part of a disposable diaper according to a third embodiment of the present invention.

[0044] In this case, a waterproof sheet 13 are extended to the outer overlapping portion 31b 1 of the triple overlapping portion 31b of the nonwoven fabric 31 in the three-dimensional gathers 3, bleeding of body fluid by waterproof sheets extending portion 13a Leakage prevention means for preventing discharge is provided. In this case, since the waterproof sheet 13 constituting a part of the absorption main body 1 is extended into the three-dimensional gather 3 to constitute a leak-proof means, in addition to the leak-proof property of the triple overlapping portion 31b,
The leakproof function of the waterproof sheet 13 will function,
It is possible to further improve leakage prevention,
The cost is not so different from the conventional one.
The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

Fourth Embodiment FIG. 9 shows a main part of a disposable diaper according to a fourth embodiment of the present invention.

In this case, similarly to the conventional structure, the three-dimensional gathers 3 are formed on the nonwoven fabric 31 by double overlapping portions 31a.
In the overlapping portion 31a of the three-dimensional gather 3, the extending portion 13 of the waterproof sheet 13 is provided.
a is extended. The waterproof sheet extending portion 13a constitutes a leak preventing means for preventing seepage of body fluid. In this way, since the waterproof sheet 13 constituting a part of the absorbent main body 1 is extended into the three-dimensional gather 3 to constitute the leak preventing means, the leak preventing property can be improved and the cost can be reduced. The result is not so different from the conventional one. Other configurations and effects are
The description is omitted because it is the same as in the first embodiment.

Fifth Embodiment FIG. 10 shows a main part of a disposable diaper according to a fifth embodiment of the present invention.

In this case, a stagnant space 33 in which the bodily fluid can stay is provided in the three-dimensional gather 3, and the stagnant space 33 constitutes a leakage preventing means for preventing seepage of the bodily fluid. The stagnation space 33 is provided at the outer overlapping portion 3 in the triple overlapping 31b of the nonwoven fabric 31.
It is formed by bonding the upper and lower portions of 1a with a hot melt adhesive HM. In this case, since the leakage prevention means can be formed by forming the stay space 33 in the three-dimensional gather 3, leakage prevention can be improved, and the cost is not so different from the conventional one. Become. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

Sixth Embodiment FIG. 11 shows a main part of a disposable diaper according to a sixth embodiment of the present invention.

In this case, an absorbing member 34 for absorbing and holding bodily fluids is provided in the stay space 33 in the fifth embodiment, and the absorbing member 34 constitutes a leak-proof means. By doing so, the bodily fluid is absorbed and held by the absorbing member 34, and the leakproofness is further improved. The other configuration and operation and effect are the same as those in the first and fifth embodiments, and thus the description is omitted.

Seventh Embodiment FIG. 12 shows a main part of a disposable diaper according to a seventh embodiment of the present invention.

In this case, the three-dimensional gathers 3
Are gathered four times, and three-dimensional gathers 3
The quadruple overlapping portion 31c itself functions as leak prevention means for preventing oozing of body fluid. Therefore, with a simple structure in which the nonwoven fabrics 31 are overlapped four-fold, it is possible to prevent the bleeding of the body fluid from the three-dimensional gathers 3, and the cost is not so different from the conventional one. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

Eighth Embodiment FIGS. 13 and 14 show a main part of a disposable diaper according to an eighth embodiment of the present invention.

In this case, a coating layer 35 formed by applying a water-repellent ink is formed on the side of the three-dimensional gather 3 opposite to the wearer, and the coating layer 35 constitutes a leak-proof means. In this way, the leak-proof means can be configured only by applying the water-repellent ink to the side face of the three-dimensional gather 3 opposite to the wearer to form the coating layer 35, so that the leak-proof property can be improved. However, the cost is not so different from the conventional one. When a color ink such as blue is used as the water-repellent ink, the color of the bodily fluid oozing into the three-dimensional gathers 3 can be blurred, and the appearance is improved. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

Ninth Embodiment FIG. 15 shows a main part of a disposable diaper according to a ninth embodiment of the present invention.

In this case, as in the case of the conventional structure, the three-dimensional gathers 3 are formed on the nonwoven fabric 31 by double overlapping portions 31a.
Is formed. A coating layer 35 formed by applying a water-repellent ink is formed on the side of the three-dimensional gather 3 opposite to the wearer, and the coating layer 35 constitutes a leak-proof means. In this manner, the water repellent ink is applied to the anti-wearer side surface of the conventional three-dimensional gather 3 to form the coating layer 35.
The leakage prevention means can be configured only by forming the above, so that the leakage prevention can be improved and the cost is not so different from the conventional one. When a color ink such as blue is used as the water-repellent ink, the color of the bodily fluid that has oozed into the three-dimensional gather 3 can be blurred.
Appearance becomes good. The other configuration and operation and effect are the same as those in the first embodiment, and thus the description is omitted.

Tenth Embodiment FIGS. 16 to 18 show a disposable diaper according to a tenth embodiment of the present invention.

In this case, the lip 50a of the underbody opening 50 in the crotch portion Y is positioned near the outside of the absorber 12 (5 mm).
) Or the outside gather (about 5 mm) of the standing end 3 c of the three-dimensional gather 3. In this way, the shape of the underbody can be refreshed, and the degree of freedom of the shape of the underbody increases. In addition, absorber 1
It is desirable to cut the underbody before laminating 2,
The free width of the underbody cut portion of the back sheet 2 is 5 to 15 m
m is desirable. Three-dimensional gather 3 in this case
As shown in FIG. 17, the back sheet 2 and the absorbent body 1
It is attached in a state sandwiched between it. In addition, the top sheet 11 encloses the side end of the absorber 12. In this case, the leakage prevention effect is improved.

In this case, elastic waist elastic members 81F and 81B are arranged at the ends of the front body F and the back body B, which become the waist opening 40, and are disposed in the lateral direction at a position corresponding to the lower abdomen of the front body F. Is provided along the lower abdomen elastic extension member 82F, and the buttocks elastic elastic member 82B is provided along the buttocks portion of the back body B corresponding to the lower abdominal portion. The lower abdominal elastic elastic member 82F has a front body F
Of the portion from the one-side joint 21 to the other-side joint 21 in the product width direction center portion (for example, the absorber 1
2), and is provided at a portion corresponding to the side abdomen except for the portion corresponding to the side abdomen.
F and 82F are discontinuous. On the other hand, the buttocks elastic elastic member 82B is connected to the joint 2 on one side in the back body B.
It is attached so as to extend continuously from 1 to the joint 21 on the other side. In this way, the stomach is not tightened, rubber marks are not adhered, and the stomach is not fitted and shifted. Note that the lower abdominal elastic members 82F, 82F,.
Is preferably 7 mm or less, since wrinkles are reduced. If the area where the elastic elastic member is disposed is extended to the underbody, higher fitting properties can be obtained. It is desirable that the thickness of the elastic elastic member is 620 dtex or less,
The tension is desirably set to 150 to 350%.

The other configuration and operation and effect are the same as those in the first embodiment, and the description is omitted.

Eleventh Embodiment FIG. 19 shows a paper diaper according to an eleventh embodiment of the present invention.

In this case, the waterproof sheet 13 extends to a position below the three-dimensional gear gatherer 3, and the extended portion 13 a is folded back so as to wrap the outer part of the absorber 12. The back sheet 1 is formed by joining two nonwoven fabrics. Other configurations and effects are
The description is omitted because it is the same as in the first embodiment.

Incidentally, the present invention is not limited to the disposable diaper according to the above-described embodiment, but is also applicable to disposable diapers of the type described below.

For example, as shown in FIG. 20A, only three-dimensional gathers 3 and 3 are provided, and the underbody opening does not expand or contract. As shown in FIG.
The underbody gathers 9, 9 are provided in addition to the three-dimensional gathers 3, 3 so that the entire periphery of the underbody opening is expanded and contracted. As shown in FIG. The underbody gathers 9, 9 are provided in an intersecting state, and are of a type in which the entire circumference of the underbody opening is expanded and contracted. As shown in FIG. 2, 9 and 9 are provided in a state where they are arranged in parallel, and the entire circumference of the underbody opening expands and contracts.
As shown at 0 (e), in addition to the three-dimensional gathers 3, 3, the underbody gathers 9, 9 are provided in parallel with the three-dimensional gathers 3, 3, and the underbody opening partially expands and contracts. The present invention is also applicable to the type.

Further, as shown in FIG. 21 (a), only the waist elastic members 81F and 81B are provided, and the entire circumference of the waist opening expands and contracts, but the lower abdomen and buttocks do not expand and contract. As shown in FIG. 21 (b), the waist elastic elastic members 81F and 81B and the lower abdomen and buttocks elastic elastic members 82F and 82B are provided, and the entire circumference of the waist opening is expanded and contracted and the lower abdomen and A type in which the entire circumference of the buttocks expands and contracts. As shown in FIG. 21C, the waist elastic elastic members 81F and 81B and the lower abdomen and buttocks elastic elastic members 82F and 82B are provided. A type in which the central part of the buttocks elastic elastic members 82F and 82B is missing and the entire circumference of the waist opening expands and contracts, but the lower abdomen and part of the buttocks expand and contract;
As shown in FIG. 21 (d), the waist elastic elastic member 81
F, 81B and lower abdomen and buttocks elastic elastic members 82F, 8
2B is provided, but the waist elastic elastic member 81 is provided.
F, 81B, and the central part of the lower abdomen and buttocks elastic elastic members 82F, 82B are missing, a part of the waist opening expands and contracts, and a part of the lower abdomen and buttocks expands and contracts. As shown in FIG. 21 (e), waist elastic elastic members 81F and 81B are provided except for the side abdomen, and a net-like elastic elastic member 91 is provided on the side abdomen.
The present invention is also applicable to a type in which the flap 91 and the waist opening and the waist opening expand and contract.

In each of the above embodiments, a pants-type disposable diaper has been described as an example. However, it goes without saying that the present invention can also be applied to disposable types of disposable diapers.

[0067]

According to the first aspect of the present invention, there is provided a disposable diaper having a back sheet and an absorbent body, wherein the back sheet is provided with a three-dimensional gather that abuts around the underbody. In a position where a part can be visually recognized from the opening of the underbody, as a means for preventing leakage of body fluids is provided, when urinating in an unnatural posture, Even if bodily fluid (for example, urine) accumulates on the adhesive portion, the bodily fluid does not ooze out through the three-dimensional gathers, so that the comfort of the part that can be visually recognized from the underbody opening in the mounted state. Also, there is an effect that the feeling of cleanliness can be maintained for a long time.

As in the invention of claim 2, claim 1
In the disposable diaper described in the above, when the free-end play from the bonding position of the underbody portion of the back sheet is reduced, the underbody opening is refreshed to emphasize the pants-like nature, but is prevented by three-dimensional gathers. Since the leaking means is provided, bleeding of the body fluid is eliminated, and the clean feeling can be maintained for a long time.

As in the invention of claim 3, claim 1
3. In the disposable diaper according to any one of (2) and (3), when the nonwoven fabric forming the three-dimensional gathers is overlapped three or more times, and the three-dimensional gathers themselves are provided with a function as a leak-proof means, the nonwoven fabrics are overlapped three or more times. With a simple structure, it is possible to prevent the bleeding of the body fluid from the three-dimensional gather, and the cost is not much different from the conventional one.

As in the invention of claim 4, claim 3
In the disposable diaper according to the above, when the overlapping region of the nonwoven fabric in the three-dimensional gather is bonded with a hot melt adhesive, the hot melt adhesive bonding the overlapping region of the nonwoven fabric also contributes to the improvement of the leakproofness of the three-dimensional gather. From this point, the leakproofness is further improved.

According to a fifth aspect of the present invention, in the disposable diaper according to any one of the first to third aspects, a waterproof sheet is interposed between the absorbent body and the back sheet, and the waterproof sheet is provided. Is extended in the three-dimensional gather, and the waterproof sheet extending portion constitutes the leak-proof means, the leak-proof means can be configured by extending a waterproof sheet constituting a part of the absorption main body. And the cost is not much different from the conventional one. In addition, when the invention of claim 5 is applied to the invention of claim 3, it is possible to further improve leakage prevention.

As in the sixth aspect of the present invention, in the disposable diaper according to any one of the first to third aspects, a retaining space in which bodily fluids can be retained is provided in the three-dimensional gather, and the retaining space is provided by the retaining space. When the leak-proof means is configured, the leak-proof means can be configured only by forming a stay space in the three-dimensional gather, and the cost is not much different from the conventional one. In addition, when the invention of claim 6 is applied to the invention of claim 3, it is possible to further improve leakage prevention.

As in the invention of claim 7, claim 6
In the disposable diaper described in the above, when an absorbing member for absorbing and holding bodily fluid is provided in the staying space and the absorbing member constitutes a leak-proof means, the bodily fluid is absorbed and held by the absorbing member, and the Is further improved.

As in the invention of claim 8, in the disposable diaper according to any one of claims 1, 2, 3, 4, 5, 6, and 7, a water-repellent ink is provided on the side of the three-dimensional gather opposite to the wearer. In the case of forming the coating layer by applying the above, the leak-proof means is configured by the coating layer, on the anti-wearer side surface in the three-dimensional gather, just by applying a water-repellent ink to form a coating layer,
Leak prevention means can be configured, and the cost is not much different from the conventional one. In addition, Claim 3,
When the invention of claim 8 is applied to the inventions of 4, 5, 6, and 7, it is possible to further improve leakage prevention.

[Brief description of the drawings]

FIG. 1 is an enlarged sectional view of a main part of a disposable diaper according to a first embodiment of the present invention.

FIG. 2 is a perspective view of the disposable diaper according to the first embodiment of the present invention.

FIGS. 3A to 3G are cross-sectional views of a main part showing a procedure for manufacturing three-dimensional gathers in the disposable diaper according to the first embodiment of the present invention.

FIG. 4 is a perspective view of a sailing type used when manufacturing three-dimensional gathers in the disposable diaper according to the first embodiment of the present invention.

FIGS. 5A to 5D are cross-sectional views of main parts showing a state of sailing processing when manufacturing three-dimensional gathers in the disposable diaper according to the first embodiment of the present invention.

FIGS. 6A to 6G are cross-sectional views of main parts showing another procedure for manufacturing three-dimensional gathers in the disposable diaper according to the first embodiment of the present invention.

FIG. 7 is an enlarged sectional view of a main part of a disposable diaper according to a second embodiment of the present invention.

FIG. 8 is an enlarged sectional view of a main part of a disposable diaper according to a third embodiment of the present invention.

FIG. 9 is an enlarged sectional view of a main part of a paper diaper according to a fourth embodiment of the present invention.

FIG. 10 is an enlarged sectional view of a main part of a disposable diaper according to a fifth embodiment of the present invention.

FIG. 11 is an enlarged sectional view of a main part of a disposable diaper according to a sixth embodiment of the present invention.

FIG. 12 is an enlarged sectional view of a main part of a disposable diaper according to a seventh embodiment of the present invention.

FIG. 13 is an enlarged sectional view of a main part of a disposable diaper according to an eighth embodiment of the present invention.

FIG. 14 is an enlarged perspective view showing a main part of a three-dimensional gather in a disposable diaper according to an eighth embodiment of the present invention.

FIG. 15 is an enlarged sectional view of a main part of a disposable diaper according to a ninth embodiment of the present invention.

FIG. 16 is a developed plan view of a disposable diaper according to a tenth embodiment of the present invention.

FIG. 17 is an enlarged sectional view of a main part of a disposable diaper according to a tenth embodiment of the present invention.

FIG. 18 is a perspective view of a disposable diaper according to a tenth embodiment of the present invention.

FIG. 19 is an enlarged sectional view of a main part of a disposable diaper according to an eleventh embodiment of the present invention.

FIGS. 20A to 20E are developed plan views showing a disposable diaper to which the present invention can be applied.

FIGS. 21 (a) to 21 (e) are developed plan views showing other types of disposable diapers to which the present invention can be applied.

FIG. 22 is a developed plan view of a general pants-type paper diaper.

FIG. 23 is an enlarged sectional view of a main part of a disposable diaper which is one of conventional examples.

FIG. 24 is an enlarged sectional view of a main part of a disposable diaper which is another example of the conventional example.

FIGS. 25 (a) to (d) are cross-sectional views of essential parts showing a procedure for manufacturing three-dimensional gathers in a disposable diaper which is one of conventional examples.

[Explanation of symbols]

1 is an absorption main body, 2 is a back sheet, 3 is a three-dimensional gather,
11 is a top sheet, 12 is an absorber, 13 is a waterproof sheet, 31 is a nonwoven fabric, 31a is a double overlapped portion, 31
b is a triple overlapping portion, 32 is an elastic body, 33 is a retention space, 34 is an absorbent, 35 is a coating layer, and HM is a hot melt adhesive.

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 3B029 BC02 BC07 BD12 BD14 BD15 4C098 AA09 CC03 CC07 CC12 CC15 CE06 DD03 DD05 DD10 DD12 DD25 DD27 DD28

Claims (8)

[Claims]
1. A disposable diaper comprising a back sheet and an absorbent main body, wherein the back sheet is provided with a three-dimensional gather that abuts around the underbody, wherein the three-dimensional gather is:
A disposable diaper characterized by being provided at a position where a part thereof can be visually recognized from an opening in the undercarriage in a mounted state, and provided with a leak-proof means for preventing seepage of body fluid.
2. The underbody portion of the back sheet,
The disposable diaper according to claim 1, wherein play of the free end from the bonding position is reduced.
3. The three-dimensional gather is provided with a function as a leak-proof means by overlapping the nonwoven fabric forming the three-dimensional gather three or more times.
3. The disposable diaper according to any one of claims 2 and 3.
4. The disposable diaper according to claim 3, wherein the overlapping region of the nonwoven fabric in the three-dimensional gather is bonded with a hot melt adhesive.
5. A waterproof sheet is interposed between the absorbing body and the back sheet, and the waterproof sheet is
The disposable diaper according to any one of claims 1, 2 and 3, wherein the leakage preventing means is extended in the three-dimensional gather, and the waterproof and extending portion is constituted.
6. The leak collecting means according to claim 1, wherein a stagnant space in which a bodily fluid can stagnate is provided in the three-dimensional gather, and the spill space is constituted by the stagnant space.
A disposable diaper according to any one of the preceding claims.
7. The disposable diaper according to claim 6, wherein an absorbent member for absorbing and holding bodily fluids is provided in the staying space, and the leakage preventing means is constituted by the absorbent member.
8. The leakage preventing means according to claim 3, wherein a coating layer formed by applying a water-repellent ink is formed on a side of the three-dimensional gather opposite to the wearer. 1,2,3,4,5,6
A disposable diaper according to any one of claims 7 and 8.
JP2000364748A 2000-11-30 2000-11-30 Paper diaper Pending JP2002165832A (en)

Priority Applications (1)

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Country Link
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