JP3171813B2 - Disposable paper diapers - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable disposable diaper, for example, a disposable disposable diaper to be attached using a pants type such as training pants or a binding tape.

[0002]

2. Description of the Related Art Disposable disposable diapers, especially training pants, are used to promote disposable diapers during the transition from infants to infants.

Various proposals have been made for this type of pants-type disposable diaper or disposable diapers using a bonding tape.

[0004] In any disposable diaper, it is a necessary property of the product to prevent leakage of bodily fluid from around the waist, and in order to prevent lateral leakage of loose stool, in recent years, it has been widely used to form a barrier cuff. It has been.

[0005] In many products currently on the market, the barrier cuff is one on each side.
No. 901 and Utility Model Registration No. 2523726 propose to provide two barrier cuffs on each side.

[0006]

However, it has been found that even if two barrier cuffs are simply provided on each side, the barrier leakage is more effective than one barrier cuff, but the effect is not necessarily remarkable.

Accordingly, an object of the present invention is to provide a disposable diaper having a remarkable effect of preventing lateral leakage.

[0008]

According to the first aspect of the present invention, which solves the above-mentioned problems, the present invention provides a liquid-permeable top sheet and an impervious sheet.
A disposable diaper having an absorber between a liquid back sheet and barrier cuffs on both sides of a product, comprising: (1) an easily deformable region outside both side edges of the absorber, and at least a crotch region; Along the longitudinal direction in the area corresponding to the part; a gasket cuff elastic elastic member, having an elastic elastic member near the tip, and having a second barrier cuff standing up on the wearer side when worn by its contracting force, (2) At least in the crotch-equivalent region, along the longitudinal direction, at the center of the product in the product width direction from the second barrier cuff, an elastic elastic member is provided near the tip, and stands up to the wearer side at the time of wearing due to the contractive force. (3) an erect line extending from the easily deformable region of the second barrier cuff is located in the widthwise middle of the contraction force acting region of the gasket cuff elastic elastic member. A disposable disposable diaper, which is located closer to the center in the product width direction.

According to a second aspect of the present invention, the gasket cuff elastic elastic member includes a plurality of elastic elastic members at intervals in the width direction, and the second elastic elastic member for the gasket cuff is located at the center of the product in the width direction. The disposable paper diaper according to claim 1, wherein the barrier cuffs have standing lines.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in more detail with reference to embodiments shown in the drawings.

FIGS. 1 and 2 show a first embodiment of a pants-type paper diaper according to the present invention, wherein a liquid-permeable top sheet 1 made of a non-woven fabric or the like and a liquid-impermeable back sheet made of a polyethylene sheet or the like. An absorber element 4 having a structure in which the absorber 3 is wrapped around the main body 2 is provided on the main body backsheet 30.

The main body back sheet 30 is a continuous sheet that defines the overall shape over the entire outer surface of the final product. For example, the main body back sheet 30 is made of a material that exhibits elasticity in at least one of the front-rear direction and the width direction. The degree of stretching is 150% or more. Body backsheet 30 in the embodiment
Is shaped like an hourglass. It is desired that the main body back sheet has at least one of air permeability and waterproofness (water repellency), more preferably both properties, from the viewpoint of preventing stuffiness. The material can be appropriately selected, for example, heat-fusing a rayon spunlace nonwoven fabric which is a blend of a polypropylene-based heat-sealing fiber and rayon fiber, and a melt-blown nonwoven fabric mainly comprising a urethane or isoprene rubber-based material, An example in which the nonwoven fabric is integrated by ultrasonic bonding, hot melt adhesive bonding, or the like and the former nonwoven fabric is used on the skin side of the wearer can be given.

A first barrier cuff 10 is fixed to the main body backsheet 30 at the center in the product width direction, and a second barrier cuff 20 is fixed to the outside.

The first and second barrier cuffs 1
0, 20 is preferably a first liquid-impermeable or water-repellent first material.
And second barrier sheets 11 and 21. The rising line of the first barrier sheet 11 is located at the side edge of the absorber 3,
The rising line of the second barrier sheet 21 is located outside the side edge of the absorber 3 (ie, in the easily deformable region where the absorber 3 is not present), and is positioned outward (hereinafter, inward and outward) with respect to the main body backsheet 30. Means width direction unless otherwise noted)
The part is fixed by hot melt adhesive or the like.

Further, the first and second barrier sheets 1
The elastic expansion members 12 and 22 for barrier cuffs made of thread rubber or the like are fixed by a hot-melt adhesive or the like under the stretched state so that the inner part stands up on the wearer side. The inner part stands up as a free part (standing part). Although the first and second barrier sheets 11 and 21 have reached the front and rear ends of the product, the elastic elastic members 12 and 2 for barrier cuffs are provided.
2 occupies at least the crotch. As can be seen from this example, the first and second barrier cuffs 10, 20 need only be along the longitudinal direction at least in the region corresponding to the crotch portion to prevent lateral leakage.

Before and after the product, waist elastic members 5A and 5B are provided. The waist elastic members 5A and 5B in the illustrated example are band-shaped, and include the liquid-permeable top sheet 1 and the first and second barrier sheets 11,
21, covered by the outer side in the width direction (edge portion of the product)
And both ends in the longitudinal direction (outer parts of the product) are fixed with hot melt adhesive or the like. Therefore, when worn, it functions as a barrier for body fluid (constituting the front and rear gasket cuffs).

As shown in detail in FIG. 2, between the main body back sheet 30 and the second barrier sheet 21, an elastic elastic member 6 for gasket cuffs is provided in the illustrated example to contact the wearer's skin. To soften
A plurality of, specifically, four of them are fixed under stretching by a hot melt adhesive or the like at intervals in the width direction.

The first barrier sheet 11 has an outer portion adjacent to the gasket cuff elastic elastic member 6A located at the center of the gasket cuff elastic elastic member 6, 6... And is fixed to the liquid permeable top sheet 1 and the main body back sheet 30 with a hot melt adhesive or the like. The second barrier sheet 21 partially covers the outer edge of the first barrier sheet 11 and is fixed by a hot-melt adhesive or the like at the covering portion, and the fixed boundary is defined by the rising line of the second barrier cuff 20. And the position of the standing line is
The gasket cuff elastic elastic member 6A is located near the center in the product width direction. Preferably, the position is within 10 mm on the left and right of the elastic elastic member 6A for gasket cuffs.

In the case of the pants type, the disposable diaper having such a configuration is folded back and forth with the horizontal center line in FIG. 1 as a boundary, and the front and rear sides of the main body backsheet 30 are fixed to each other by heat sealing or the like. It will be commercialized. Alternatively, in the case of mounting using a bonding tape, the bonding tape is fixed to both sides of the rear portion of the product to produce the product.

In any case, when mounted from the unfolded state, as shown in the lower part of FIG. 2, the first barrier cuff 10 and the second barrier cuff 20 are respectively contracted by the elastic expansion members 12 and 22 for barrier cuffs. The free part stands up. Since the contraction force of the elastic elastic members for gasket cuffs 6, 6,... (Including 6A) acts, the left portion of the elastic elastic member for gasket cuffs 6A has no absorber 3 and is easily deformed. , It is lifted to the wearer side so as to be more closely attached to the wearer's skin.

As a result, if the first barrier cuff 10
Even if the lengths of the free portions of the second barrier cuff 20 are the same, as shown in the lower part of FIG. 2, the contraction force of the elastic elastic members 6, 6,... The free portion of the two-barrier cuff 20 becomes larger and the upright height h2 of the upright edge from the liquid-permeable topsheet 1 is higher than the upright height h1 of the first barrier cuff 10.

This embodiment has the following advantages. (1) In addition to the first barrier cuffs 10, the second barrier cuffs 20 enable the second barrier cuffs 20 to prevent body fluids (including loose stool) that could not be prevented by the first barrier cuffs 10.

(2) The free portion of the second barrier cuff 20 rises more by the contraction force of the gasket cuff elastic elastic members 6, 6,... (Including 6A), so that, for example, h2> h1 in FIG. Sometimes body fluids (including loose stools) that could not be blocked by the first barrier cuff 10
Is more remarkably exhibited by the second barrier cuff 20.

(3) Since the free portion of the second barrier cuff 20 stands more vertically (refer to FIG. 2), the space or space between the free portion of the first barrier cuff 10 and the free portion of the second barrier cuff 20 is provided. (From the unfolded state), the body fluid that cannot be blocked by the first barrier cuff 10 and can be retained therebetween can be held therebetween, and the function of blocking by the second barrier cuff 20 becomes remarkable.

(4) As a result of the above (2) and (3), the contraction force of the elastic elastic member 22 for the barrier cuff of the second barrier cuff 20 can be reduced, so that the wearer can be released from excessive pressure. .

(5) The gasket cuff elastic members 6, 6 ... (including 6A) are the second barrier cuffs 20.
In addition to enhancing the standing effect of the product, the leg portion of the product can be fitted to the wearer by itself, and even if the body fluid exceeds the second barrier cuff 20, it can be blocked there, and the second barrier cuff 20 can be When moistened with liquid, it prevents further moistening to the outside and enhances moisture resistance. Furthermore, elastic elastic members for gasket cuffs 6, 6,...
Of the first barrier cuff 10 and the free portion of the second barrier cuff 20 do not protrude further outward and protrude. It always stands inward, and performs well as the original barrier cuff function.

(6) By adding the elastic elastic members for gasket cuffs 6, 6,..., The above functions are fully exhibited, and therefore the second barrier cuff 10 has a second barrier with respect to the width of the free portion of the first barrier cuff 10. The length of the free portion of the cuff 20 in the width direction can be reduced, the cost hardly increases, and the cost is extremely excellent in view of the balance with the entire function. Specifically, when the width in the width direction of the free portion of the first barrier cuff 10 is 30 to 50 mm, the easily deformable area between the rising line of the first barrier cuff 10 and the rising line of the second barrier cuff 20 Is interlocked with the free portion of the second barrier cuff 20, so that the length of the free portion of the second barrier cuff 20 in the width direction is equal to the first barrier cuff 1
The width can be reduced by 20 to 40 mm from the length of the free portion in the width direction.

(7) By separating the rising line of the first barrier cuff 10 from the rising line of the second barrier cuff 20,
The first barrier cuff 10 and the second barrier cuff 2 are formed by the contraction force of the elastic elastic members 6, 6,... For the gasket cuff.
A pocket (a space between the free portions of the respective barrier cuffs) is formed between the first and second barrier cuffs, and the function of blocking the bodily fluids (including loose stool) that could not be prevented by the first barrier cuff 10 with the second barrier cuff 20 becomes remarkable. . Specifically, it is desirable that the rising line of the first barrier cuff 10 and the rising line of the second barrier cuff 20 be separated by 10 to 40 mm.

(Modifications: These examples are within the scope of the first and second aspects of the present invention.) FIG. 3 shows the barrier sheet 40 constituting the first barrier cuff 10 and the second barrier cuff 20 in the width direction. This is an example in which the sheet is formed by one continuous sheet. In the second barrier cuff 20, the barrier sheet 40 is double.

FIG. 4 shows a state in which the first barrier sheet 11 of the first barrier cuff 10 is extended, and the second barrier sheet 11 of the second barrier cuff 20 is fixed thereon.

FIG. 5 shows an example in which the barrier sheet 41 constituting the first barrier cuff 10 and the second barrier cuff 20 is formed of one continuous sheet in the width direction. However, the liquid-permeable top sheet 1 extends outward of the product, and the barrier sheet 41 is fixed to this.

FIG. 6 shows an example in which the main body backsheet 30 is not provided, the liquid-impervious backsheet 2 is used as the outer shape of the product, and the first barrier cuff 10 and the second barrier cuff 20 are fixed thereto. Thus, in the present invention, the use of the main body back sheet 30 is not essential. Further, as long as the main body backsheet 30 has a liquid-impermeable sheet, the liquid-impermeable backsheet 2 can be omitted. In this case, the main body backsheet 30 itself constitutes the liquid-impermeable backsheet of the present invention.

Returning to FIG. 2, on the other hand, in this example,
The upright line of the second barrier cuff 20 is located at a position corresponding to the gasket cuff elastic elastic member 6A, but the product width direction is closer to the middle of the contraction force action area of the gasket cuff elastic elastic member 6, 6, 6, 6A. As long as it is on the center side, the second barrier cuff 20 basically stands by performing the aforementioned functions.

(Embodiment of Manufacturing Method) Next, an embodiment of the manufacturing method shown in FIGS. 1, 2, 4 and 6 will be described with reference to FIGS.
In the example of FIG. 6, since the main body backsheet 30 does not exist, in the following drawings, the portion denoted by reference numeral 30 is understood to be the liquid-impermeable backsheet 2 and the portion denoted by reference numeral 4 is referred to as the liquid-permeable topsheet 1. I just need.

That is, in the conventional examples (the above publications), as shown in FIG. 7, one barrier sheet 50A is prepared for one side of the product, and the barrier sheet 50A is provided in at least three places, usually in four places. While being folded back at the place, the semi-finished product is fixed to the semi-finished product with a hot melt adhesive or the like at the position indicated by reference numeral 50B, which is not excellent in terms of manufacturing equipment and production technology. In addition, the barrier cuff is a double barrier sheet, which is rigid and costly.

However, as shown in FIG. 10 and FIG. 11, which is an enlarged view of a main part thereof, a semi-finished product in which the absorber elements 4, 4... In the manufacturing line, the original barrier sheet 50 for the barrier cuffs in the predetermined width direction is cut in advance by three slitters 51, 51, 51 at three places in the width direction, and the two first barrier sheets 11, 11, 2
The second barrier sheets 21 and 21 are formed, and only the vicinity of the leading end of the rising portion of each barrier sheet is folded back, and the elastic elastic members 12 and 22 for barrier cuffs corresponding to the folded portions are formed by hot melt adhesive or the like. In the fixed state, the base side (outer portion) of each of the barrier sheets is fixed to the semi-finished product, and at that time, as shown in FIGS. 1, 2, 4 and 6,
The second barrier sheet base overlaps and is fixed to the first barrier cuff.

In FIG. 10 and FIG. 11, reference numeral 52 denotes a feeder for the elastic expansion members 12 and 22 for barrier cuffs. FIG. 8 schematically shows a fixing structure of the barrier cuff corresponding to the example shown in FIG. 2 and FIG. 9 corresponds to the example shown in FIG.

The semi-finished product is, as in the prior art,
The line is intermittently cut in the longitudinal direction of the line, and the leg around portion of the main body back sheet 30 is cut to produce a product.

According to the manufacturing mode and the structure of the barrier cuff, there are the following advantages. (1) Compared to the conventional example in which the entire barrier cuff is double, only the vicinity of the tip of the barrier cuff is double,
Even when the elastic elastic member for barrier cuffs has a small contraction force, it is easy to stand up, is soft, and has excellent fit around the leg. (2) Compared with the conventional example in which the entire barrier cuff is double, only the tip of the barrier cuff is double, so that the cost is reduced. (3) The number of turning points is two, the manufacturing equipment is simplified, and the product management is excellent.

FIGS. 12, 13 and 14 show examples of the manufacturing method of FIGS. 3, 4 and 5, respectively.
Since these manufacturing methods are apparent from each drawing, they will not be described in detail.

[0041]

As described above, according to the present invention, the effect of preventing lateral leakage is remarkably exhibited.

[Brief description of the drawings]

FIG. 1 is a plan view of an unfolded state before final assembly of a disposable diaper according to a first embodiment of the present invention.

FIG. 2 is a partial cross-sectional view thereof.

FIG. 3 is a partial cross-sectional view showing a modification.

FIG. 4 is a partial cross-sectional view showing another modification.

FIG. 5 is a partial transverse sectional view showing another modification.

FIG. 6 is a partial cross-sectional view showing still another modified example.

FIG. 7 is an explanatory view of a conventional barrier cuff.

FIG. 8 is an explanatory diagram of an example of manufacturing a barrier cuff.

FIG. 9 is an explanatory diagram of an example of manufacturing a barrier cuff with another structural example.

FIG. 10 is a plan view of the example of the manufacturing method.

FIG. 11 is an enlarged plan view of the main part.

FIG. 12 is a plan view of the example of the manufacturing method of the example shown in FIG. 3;

13 is a plan view of the example of the manufacturing method of the example shown in FIG.

14 is a plan view of the example of the manufacturing method of the example shown in FIG.

[Explanation of symbols]

1 ... liquid-permeable top sheet, 2 ... liquid-impermeable back sheet,
3 ... absorber, 4 ... absorber element, 6,6A ... elastic elastic member for gasket cuff, 10 ... first barrier cuff, 11
... First barrier sheet, 12 ... Elastic elastic member for first barrier cuff, 20 ... Second barrier cuff, 21 ... Second barrier sheet, 22 ... Elastic elastic member for second barrier cuff, 30 ... Back sheet for main body, 50 ... Hara barrier sheet, 51 ... Slitter.

────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Keiko Nunokawa 5-1 Kamiyacho, Iyo Mishima City, Ehime Prefecture Daio Paper Co., Ltd. (56) References Table 11-11-506955 (JP, A) (58) Survey Field (Int.Cl. ⁷ , DB name) A61F 13/494

Claims (2)

(57) [Claims] 1. A liquid-permeable topsheet and a liquid-impermeable backsheet.
Has an absorption body between the bets, yet disposable diaper having barrier cuffs on both sides of the product, (1) the a deformable region of the outward from both side edges of the absorbent body, and at least the crotch portion corresponding region (2) along the longitudinal direction; having an elastic elastic member for gasket cuffs, and a second barrier cuff having an elastic elastic member near the distal end and standing on the wearer side when worn by its contracting force; A first barrier that has an elastically stretchable member near the tip thereof in the product width direction at least in the longitudinal direction at least in a region corresponding to the crotch portion and that is closer to the wearer side than the second barrier cuff at the center in the product width direction; (3) The rising line from the easily deformable region of the second barrier cuff is closer to the product width than the middle in the width direction of the contraction force acting region of the elastic elastic member for the gasket cuff. The center side, disposable diapers, characterized in that. 2. The gasket cuff elastic elastic member includes a plurality of elastic elastic members at intervals in a width direction, and a second elastic elastic member for a gasket cuff located closest to the center in the product width direction.
The disposable disposable diaper according to claim 1, wherein there is a standing line of the barrier cuff.