JP3382827B2 - 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 paper diaper, and more specifically, it is provided with an outer layer sheet that defines the outer shape of a diaper and an absorber, and fastens both front and rear body parts to each other, leaving the legs around. About disposable diapers.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional paper diaper 100 is provided with a semi-rigid absorber 101 on the inner surface side of an outer layer sheet 102A that defines the outer shape of a diaper, and has a front body side and a back body side both around the legs. The outer layer sheet 102 </ b> A that defines the outer shape of the diaper is wider than the absorbent body 101 with respect to the crotch portion Y <b> 1.

Further, in the conventional method for manufacturing a disposable diaper, as shown in FIG. 6, in a step after the absorbent body 101 is laminated on the continuous body 102 of outer layer sheets which defines the outer shape of the diaper, the absorbent bodies 101, 101 are formed. The leg-surrounding portion 103 was cut at a portion that is not located on the absorbent body 101 between.

[0004]

However, since such a conventional paper diaper has a wide crotch width and the holes through which the legs pass are opened to the side of the diaper, the thighs are worn or worn when the diaper is worn. It was easy to get caught in the leg area and it was difficult to pass the leg.

This problem is mainly due to the above-mentioned conventional manufacturing method. That is, in the conventional method, the leg portion of the continuous body of the outer layer sheet that determines the outer shape of the diaper is cut in the step after the absorber is laminated to the outer layer sheet or the step after the laminate including the absorber is laminated. Therefore, inevitably, the cuttable portions are limited to the portions between the absorbers that are not located on the absorber. As a result, in the conventional method, the cut size and the cut shape of the leg part are also limited, and the width of the outer layer sheet cannot be made narrower than that of the absorber, particularly in the crotch part. In the conventional manufacturing method, it is not impossible to reduce the width of the outer layer sheet in the crotch part by laminating the absorber having a narrow crotch part, but it reduces the absorption capacity of the crotch part. Not preferable.

[0006] Therefore, a main object of the present invention is to provide a disposable diaper in which legs can be easily passed.

[0007]

The paper diaper of the present invention which has solved the above-mentioned problems is a paper diaper having a back sheet, an absorber and a top sheet on the use surface side of an outer layer sheet that defines the outer shape of the diaper, at least with respect to the crotch part Previous
Both side edges of the absorbent body are more outward than both side edges of the outer layer sheet.
And it is characterized in that it is located.

Further, the paper diaper of the present invention is a paper diaper provided with an outer layer sheet for defining the outer shape of the diaper and an absorbent body, wherein the absorbent body is mainly composed of cotton-like pulp, and is wrapped with absorbent paper, and at least the crotch area. with respect to the part, the
The both side edges of the absorbent body are positioned outward from the both side edges of the outer layer sheet.
It is characterized by having placed .

In the disposable diaper of the present invention, it is preferable that an elastic expansion / contraction portion for tightening around the leg is formed outside the side edge of the absorber. There is also provided a disposable diaper in which the absorbent body is mainly composed of cotton-like pulp and wrapped with absorbent paper, and the absorbent body is semi-rigid.

<Operation> The paper diaper of the present invention has the above-mentioned suction at least at the crotch portion.
Both side edges of the container are located outside the both side edges of the outer layer sheet.
Since you are the legs through hole is opened downward than the conventional. Therefore, the disposable diaper of the present invention is easier to pass through the leg than the conventional one. Further, in the paper diaper of the present invention having the elastic stretchable portion on the outer side of the absorbent body, the elastic stretchable portion fits the thigh base portion, so that crotch leakage does not easily occur. In this paper diaper, since the elastic stretchable portion is located outside the side portion of the absorbent body, it stretches, so that leg leg easiness is not impaired. In the method of manufacturing a paper diaper in the embodiment described later, with respect to the continuous body of the outer layer sheet that defines the outer shape of the diaper,
Since the absorber or the laminated body including the absorber is laminated after cutting the leg part, the cuttable portion is limited to a portion not located on the absorber between the absorbers as in the conventional example. Absent. Therefore, in the method for manufacturing a disposable diaper according to the embodiment, the cut size and the cut shape of the leg portion can be freely determined. It is also possible to manufacture an absorber having a width equal to or smaller than the width of the absorber.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows an example 1 of a disposable diaper according to the present invention, FIG. 2 shows a developed state viewed from the top sheet side, and FIG. 3 shows a longitudinal section of a crotch portion Y2. That is, the paper diaper 1 of this example includes an outer layer sheet 7 that defines the outer shape of the diaper and a semi-rigid absorber 4, and is fastened to both sides of the front body and both sides of the back body, leaving the leg-surrounding portions 7a. The width of the outer layer sheet 7 is less than or equal to the width of the absorber 4 at least with respect to the crotch portion Y2.

More specifically, as shown in FIG. 2, in the outer layer sheet 7 which defines the outer shape of the diaper, the front body flap portions FF1 and F are provided at four corners by cutting the leg parts 7a.
F2 and rear body flap portions FB1 and FB2 are formed. Then, as shown in FIG. 1, the front body and the back body are overlapped so that the front body flap portion FF1,
The side edge of FF2 and the corresponding back body flap portion F
The side ends of B1 and FB2 are fixed to each other with a hot melt adhesive or heat seal. In addition, the outer layer sheet 7
Is, as shown in FIG. 3, two flexible sheets 7D and 7E.
(Example: non-woven fabric) and has a double structure, and elastic stretchable members G1 and G1 for tightening around the waist and legs are appropriately provided between the seats 7D and 7E in the leg-surrounding portion 7a and the waist-surrounding portion 7b. Arrange several. Further, although not shown, the outer layer sheet 7 can be formed by integrating the waist portion and the crotch portion (the portion forming the leg portion) with each other.

Further, in the paper diaper 1 of this example, an absorbent body accommodating portion 5 extending in the front-rear direction with the crotch portion Y2 therebetween is provided on the inner surface side of the outer layer sheet 7, and the absorbent body accommodating portion 5 absorbs the absorbent body. The body 4 is included. As shown in FIG. 3, the absorbent body containing section 5 is composed of a liquid-permeable top sheet 2 made of a non-woven fabric or the like that comes into direct contact with the wearer's skin, and a liquid-impermeable back sheet 3 made of polyethylene or the like. In the meantime, an absorbent body 4 mainly composed of cotton-like pulp and optionally wrapped with absorbent paper (not shown) is included. The top sheet 2 and the back sheet 3 are adhered to each other at their peripheral portions with a hot melt adhesive or the like. In the adhesive edge portions on both sides, it is desirable to arrange an appropriate number of elastic stretchable members G2, G2 between the top sheet 2 and the back sheet 3 along the longitudinal direction of the edge portions. As a result, the side edges 5a, 5a of the absorbent body housing portion 5 located on the outer side of the absorbent body 4 in the crotch portion Y2 function as elastic stretchable portions, and fit well to the base of the thigh, thus preventing crotch leakage. Planned.
Further, the width of the absorber 4 is preferably about 9 cm as in the conventional case.

Further, in the paper diaper 1 of this example, a hydrophobic and breathable barrier sheet 6 made of a stretchable non-woven fabric or the like is arranged so as to wrap the absorbent body accommodating portion 5. Each of the both sides of the barrier sheet 6 is folded back in an M shape, and the folded back portions 6A and 6A project inward of the diaper.
The elastic expansion / contraction members G3, G3, etc., such as thread rubber, are sandwiched in the inside, and the facing inner surfaces of the folded-back portions 6A, 6A ... Are adhesively fixed. As a result, the barrier sheet 6
The folded-back portions 6A, 6A, ... function as elastic stretchable portions that tighten around the legs on the outer side edges of the absorbent body 4. The barrier sheet 6 is made of, for example, a hot melt adhesive or heat seal, and the top sheet 2 and the back sheet 3 are formed.
Is fixed to the peripheral edge of the. The barrier sheet 6 is fixed to the outer layer sheet so that the fixing portion is linear (front body to back body direction) on the surface of the outer side of the back sheet 3 opposite to the side surface of the back sheet 3. It

By the way, the paper diaper of this example cannot be manufactured by the conventional manufacturing method as described above, but can be manufactured by the method of manufacturing the paper diaper in the following embodiments. That is, as shown in FIG. 4, a continuous outer layer sheet 70 wound in advance is unwound, and a leg cutter portion or the like is used by a roll cutter device (not shown) or the like so that the width of the crotch portion is equal to or less than the width of the absorber 4. Cut (cut) 7a.

After that, the absorber accommodating portion 5 is arranged on the upper surface of the outer layer sheet 70 (the surface which becomes the inner surface of the diaper) so as to extend in the front-rear direction centering on the crotch portion. Although not shown, the absorbent body containing section 5 is arranged, for example, at a predetermined position of the outer layer sheet 70 by stacking the liquid impermeable back sheet 3, the absorbent body 4, and the liquid permeable top sheet 2 in this order. At this time, the outer layer sheet 70 and the peripheral portion of the liquid impermeable back sheet 3 are adhered to each other, and the peripheral portion of the back sheet 3 and the top sheet 2 are bonded together.
And the peripheral edge of the. When arranging the elastic stretchable members G2, G2 between the top sheet 2 and the back sheet 3,
After arranging the elastic expansion / contraction members G2 and G2 on the peripheral portion of the back sheet 3, the top sheet 2 is laminated, and the peripheral portion is bonded at that time. Further, when the barrier sheet 6 is provided, the swell is first laminated and adhered, and then the back sheet 3, the absorber 4 and the top sheet 2 are laminated on the barrier sheet 6 in this order, and the periphery of the back sheet 3 is And the periphery of the liquid-permeable top sheet 2 are bonded. These are adhered by a hot melt adhesive or heat sealing.

Although the subsequent steps are not shown, they are not different from the conventional manufacturing method. That is, the absorber housing portion 5
When the disposition of is completed, one side end of the outer layer sheet 70 is then folded back to the other side. At that time or thereafter, the boundary portion L between the front body flap portion FF1 in the portion 7 ′ forming the front outer sheet in the outer layer sheet 70 and the front body flap portion FF2 in the rear outer layer sheet portion 7 ″ is ( (See FIG. 4), and is fastened with a hot melt adhesive or heat seal or the like, and at the same time, it is divided at the fastened portion to be an individual product. The outer layer sheet 70 can be cut after being fixed by a hot melt adhesive or heat sealing.

In this example of the manufacturing method, as described above, the outer layer sheet 7 has a double structure composed of two flexible sheets 7D and 7E, and the sheets 7D and 7E in the leg-surrounding portion 7a and the waist-surrounding portion 7b. When arranging an appropriate number of elastic elastic members G1 and G1 for tightening around the waist and legs, respectively, two flexible sheets 7D and 7E are overlapped and bonded together, although not shown. At that time, elastic elastic members G1, G are provided at predetermined positions between them.
By forming 1 to form an integral outer layer sheet 7,
This outer layer sheet 7 can be cut around the legs. The steps after the cutting around the legs can be performed in the same manner as the above-mentioned method. Although not shown, the leg portion of one of the flexible sheets 7D constituting the inner surface side of the outer layer sheet 7 is cut, and then the absorbent body accommodating portion 5 is arranged before or after the absorbent body accommodating portion 5 is arranged. After the installation, the leg part is previously cut on the opposite side of the one side of the flexible sheet 7D from the side where the absorber housing section 5 is disposed,
The other flexible sheet 7E forming the outer surface side of the outer layer sheet 7 may be laminated and adhered so that the leg portions of both the flexible sheets 7D and 7E overlap. The flexible sheets 7D and 7E can be adhered to each other by a hot melt adhesive or heat sealing in these methods.

Further, in the above example of the manufacturing method, the top sheet 2, the absorbent body 4 and the back sheet 3 constituting the absorbent body accommodating portion 5 are sequentially laminated and fixed on the outer layer sheet, but the invention is not limited to this. Not done. For example, the absorber housing 5
The top sheet 2, the absorbent body 4 and the back sheet 3 constituting the above are laminated in advance and integrated into a laminated body of the absorbent body accommodating portion 5 (when the barrier sheet 6 is provided, this can also be integrated). Then, this laminate can be laminated and fixed on the outer layer sheet.

[0020]

As described above, according to the disposable diaper of the present invention, the both side edges of the absorbent body are positioned outward of the both side edges of the outer layer sheet.
Since it is placed, it is easy to pass the legs. Further, according to the method for manufacturing a disposable diaper in the embodiment, since the leg part that can be cut is not limited to the part that is not located on the absorber between the absorbers, the cut size and the cut shape of the leg part can be freely set. Therefore, it becomes possible to manufacture a disposable diaper that can be defined and easily passed through the legs.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a paper diaper according to the present invention.

FIG. 2 is an exploded view of the relevant part.

FIG. 3 is a vertical sectional view of a crotch portion.

FIG. 4 is an explanatory diagram showing a method of manufacturing a disposable diaper according to the embodiment.

FIG. 5 is a perspective view showing a conventional paper diaper.

FIG. 6 is an explanatory view showing a conventional method for manufacturing a disposable diaper.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Paper diaper, 2 ... Liquid-permeable top sheet, 3 ... Liquid-impermeable back sheet, 4 ... Absorber, 5 ... Absorber housing, 6 ... Barrier sheet, 7 ... Outer layer sheet, G1, G2, G3 ... Elasticity Elastic member, 70 ... Continuous outer layer sheet, FF1, FF
2 ... Front body flap part, FB1, FB2 ... Rear body flap part.

Claims (4)

(57) [Claims] 1. A paper diaper having a back sheet, an absorbent body and a top sheet on the use surface side of an outer layer sheet that defines the outer shape of the diaper, wherein both side edges of the absorbent body are front at least with respect to the crotch portion.
A disposable diaper characterized in that it is positioned outside both side edges of the outer layer sheet . 2. A disposable diaper having a outer layer sheet defining a diaper outer absorbent body, the absorbent body are those wrapped in absorbent paper which was mainly composed of fluffy pulp, at least with respect to the crotch portion, said absorbent
Both side edges of the body are located outside the both side edges of the outer layer sheet.
Diapers, characterized by being. 3. The disposable diaper according to claim 1, wherein an elastic expansion / contraction portion for tightening a leg is formed outside the side edge of the absorber. 4. The disposable diaper according to claim 1, wherein the absorber is semi-rigid.