JPH06285113A - Disposable diaper and manufacture thereof - Google Patents

Abstract

PURPOSE:To permit a user to easily put on a diaper even in standing state or in lying-on-bed state, or even if the user moves its legs violently, without setting the user to an unreasonable attitude, by connecting the front and rear waist parts of the diaper through a joint body which is joined with the waist part, in a free joint/exfoliation-enabled from. CONSTITUTION:A disposable diaper 1 is equipped with a liquid-permeable surface sheet 2, liquid impermeable back surface sheet 3, absorptive body 4 interposed between both the sheets 2 and 3, front and rear waist parts 6 and 6' positioned on the periphery of the absorptive body 4, and an elastic contraction part having each gather at the left and right leg parts 7. The front and rear waist parts 6 and 6' are connected through an expandable joint body 5, and the waist opened port part 6A and a leg opened port part 7A are formed. A join body 5 extends from the waist opened port part 6A to the leg opened port part 7A, and at the joint part with the front waist part 6 of the joint body 5, a tape piece 5D which can be freely attached and exfoliated is installed. The joint body 5 has a nonexpandable region 5C in the intermediate region.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disposable diaper used for infants, adults or incontinent persons,
In particular, the front and back waist parts are connected when worn,
The present invention relates to a disposable diaper in which a diaper body can be worn by a wearer and a method for manufacturing the same.

[0002]

2. Description of the Related Art Various disposable diapers have been proposed in the past, and recently, various pants-type disposable diapers have been proposed. For example, JP-A-2-4364 discloses a diaper in which a pair of stretchable side panels are joined to an edge of an absorbent body to form openings of a waist portion and legs, wherein the stretchable side panel is It has been proposed that a disposable diaper that is made of a stretchable nonwoven fabric composite and has a good fit by using a stretchable material. Further, in Japanese Patent Application Laid-Open No. 4-289201, by arranging a wide elastic ribbon in the waist opening,
Disposable diapers have been proposed that reduce or eliminate the use of elastic materials to improve overall fit. Further, Japanese Utility Model Laid-Open No. 5-7219 proposes a disposable diaper having a structure in which a stretchable connecting body improves the fit between the waist and the leg.

[0003]

However, while the above-mentioned conventional pants-type disposable diaper has a flexible fit for the active activity of aged children, the size of the leg opening and waist opening is large. However, there is a problem that the legs cannot be easily passed through because of the limitation of the size, and the legs are cramped, and it becomes more difficult to wear when the wearer flaps the legs. Further, there is also a problem that a normal pants-type disposable diaper, for both infants and adults, forces the wearer to have an uncomfortable posture when worn.

In the conventional pants-type disposable diaper described above, the internal excrement cannot be easily confirmed during wearing, and the side must be torn to perform fecal treatment. There was a problem that the excrement could not be compactly rolled without leakage. Therefore, after using the pants-type disposable diaper, it is the actual situation that it is fixed with tape, rubber, string, etc. and then discarded.

Therefore, an object of the present invention is to
The wearer can be easily worn while standing or lying down, or by fluttering their legs without imposing an unreasonable posture on the wearer. Disposable diaper that can be easily adjusted and checked for excrement, and that the adjustment of the waist and excretion inside can be easily confirmed, and that the excrement can be wrapped and taped and discarded. And to provide a manufacturing method thereof.

[0006]

As a result of various studies on the structure of a pants-type disposable diaper, the inventors of the present invention have joined a waist band to the front and rear of the diaper so that the waist band can be joined and peeled off to the waist portion. It was found that the above object can be achieved by connecting via.

The present invention has been made on the basis of the above findings, and is a liquid-permeable top sheet, a liquid-impermeable back sheet, an absorbent body interposed between these two sheets, and the absorbent body. The front and rear waist portions and the left and right leg portions each having an elastic contraction member that forms a gather are formed on the left and right sides, and the front and rear waist portions are connected to each other via elastic joint bands on the left and right sides thereof. In a pants-type disposable diaper in which a waist opening and a leg opening are formed, the joint band extends from the waist opening to the leg opening, and a joint portion of the joint band with the waist portion. At least one of them is provided with a tape piece that can be joined and peeled, and the joining portion is joined with the tape piece so that the tape can be joined and peeled. To, there is provided a disposable diaper characterized by having a non-stretchable region.

The present invention also provides, as a preferred method for manufacturing the above-mentioned disposable diaper of the present invention, elastic first joining pieces at the left and right side edge portions of the front waist portion, respectively, and the rear portion. The elastic second joint pieces are joined respectively to the left and right side edge portions of the waist portion of the, and then the first joint piece and the second joint piece are joined and fixed at their edge portions. Then, the above-mentioned front and rear waist portions are connected to each other via elastic joint bands on the left and right sides thereof, respectively, to provide a method for manufacturing a disposable diaper.

[0009]

In the disposable diaper of the present invention, both legs are attached to the pair of left and right leg openings through the waist opening, as in ordinary underwear. Then, at the time of mounting, the size can be adjusted and the excrement can be easily confirmed by peeling and joining the joining bands that connect the front and rear waist portions.

[0010]

The present invention will be described in more detail based on the following examples. FIG. 1 is a perspective view showing an embodiment of the disposable diaper of the present invention, FIG. 2 is a schematic view showing a mode in which the infant is wearing the disposable diaper shown in FIG. 1, and FIG. 3 is a developed mode of the diaper shown in FIG. FIG. 4 is a partially cutaway plan view showing
It is a top view of the intermediate product on the way of manufacturing the disposable diaper shown in FIG. 5 and 6 are views corresponding to FIG. 2 showing another embodiment of the disposable use of the present invention.

The disposable diaper 1 of this embodiment shown in FIG.
Is a liquid-permeable topsheet 2, a liquid-impermeable backsheet 3, an absorbent body 4 interposed between these sheets, and front and rear waist portions 6, 6 ′ located around the absorbent body. And the left and right leg portions 7 each have an elastic contraction member 8 forming a gather, and the front and rear waist portions 6, 6'are connected to each other via elastic joint bands 5 on the left and right thereof, The waist opening 6A and the leg opening 7A are formed. Then, the joining band 5 extends from the waist opening 6A to the leg opening 7A, and at the joining part of the joining band 5 with the front waist part 6, a tape piece 5D that can be joined and peeled is provided. The tape strips 5D are provided so that the joining portions are joined to each other so that they can be joined and separated, and the joining band 5 has a non-stretchable region 5C in the middle region thereof.

More specifically, the disposable diaper 1 of this embodiment is curved in an hourglass shape in which the crotch region of the absorbent body 4 is entangled, and the topsheet 2 and the backsheet 3 conform to the shape of the absorbent body 4. The crotch region is curved and formed in the same shape as the absorber 4. Then, as shown in FIG. 3, in the waist portions 6 and 6 ′ and the leg portions 7 located around the absorbent body 4, the elastic stretchable member 8 has the above-mentioned top sheet 2 and back sheet 3.
The elastic stretchable member 8 is contracted in a free state to form waist gathers and leg gathers so that the elastic stretchable members 8 can fit in the waist and inseam regions. Has been done.

The surface sheet 2 is preferably a liquid permeable sheet that allows excrement to permeate into the absorbent body 4 and has a feeling similar to underwear. Examples of such a liquid permeable sheet include woven cloth, Nonwoven fabrics, porous films and the like are preferred. Further, a method of applying a hydrophobic compound such as a silicone oil or paraffin wax to the peripheral edge of the surface sheet 2, or a method of applying a hydrophilic compound such as an alkyl phosphate ester in advance to the entire surface and washing the peripheral edge with warm water. It is also possible to preferably use a sheet having a water repellent treatment applied to the periphery of the sheet to prevent leakage due to bleeding of urine or the like at the periphery.

Further, the back sheet 3 is a liquid impermeable sheet having moisture permeability which allows a vapor to pass through although a liquid is impermeable but is stretched by adding a filler to a thermoplastic resin, and has a feel similar to underwear. Those are preferable. As such a liquid impermeable sheet, for example, the above-mentioned film or a composite material of the film and a non-woven fabric is preferable.

The absorbent body 4 is composed of defibrated pulp as a main material and a high-molecular water-absorbing polymer in combination, or a mixture of thermoplastic resin, cellulose fiber and high-molecular water-absorbing polymer which is heat-treated. And the like, and may be a mixture of pulp. The high-molecular weight water-absorbing polymer may be present in any of the upper layer, the middle layer and the lower layer. In addition, the high molecular weight water-absorbing polymer has a weight of 20
It is preferable to use particles in the form of particles having a gelling property, which has a retention performance capable of absorbing and retaining twice or more times the amount of liquid.
Preferable examples include acrylic acid (salt) graft copolymers, saponified starch-acrylonitrile copolymers, crosslinked sodium carboxymethyl cellulose, acrylic acid (salt) polymers, and the like.

The elastic contraction member 8 is preferably a thread rubber, a flat rubber, a film type rubber, a film-like polyurethane foam, or the like, and has a stress of 7 at 150% elongation.
It is preferably from 0 to 100 grams.

Next, the characteristic parts of the present invention will be described. In the disposable diaper of the present invention, the front and rear waist portions 6 and 6'are connected to each other through the joining band 5.
The joining band 5 extends from the waist opening 6A to the leg opening 7 in the vertical direction of the disposable diaper 1.
It has been extended to A. The joining band 5 and the rear waist portion 6 ′ are joined and fixed to each other, and the joining band 5 and the front waist portion 6 are tapes provided at the front (abdominal) end of the joining band 5. The piece 5D and the peeling portions 9 provided on the left and right side edges of the front waist portion 6 are joined and peelably joined together. In addition, the bonding band 5 has
Non-stretchable region 5 formed by joining the joining band 5 in a T-shape
C is included, and each of the joining pieces 5A and 5B is configured to be able to independently expand and contract.

The elastic expansion / contraction force of the joining band 5 is 10
It is preferable to have an elastic force that stretches by 30 to 400% with a tensile force of 00 to 1500 g / cm, and in order to obtain an effective fit to the waist part, the permanent set of the elastic body at 100% stretching is 30. % Or less is preferable. The material for forming the bonding band 5 is a hot-melt type adhesive or a material that can be bonded by ultrasonic waves. Even after bonding, the feel is soft and the material can be easily torn in the width direction. The thing which consists of a laminated sheet of a fiber assembly and a film is used preferably, for example. Further, the length of the joint band 5 is 20 to 2
It is preferably 00 mm, more preferably 50 to 1
It is 00 mm. In addition, it is functionally preferable that the joint band 5 is configured to expand and contract in the width direction when worn.

The tape piece 5D has the peeling portion 9
Is adhered to the front waist portion 6 and the tape 5D is provided with an adhesive portion (not shown) on the contact surface with the peeling portion 9. There is. The adhesive portion may be provided on the entire surface of the tape piece 5D, but is provided so that its width is shorter than the width d of the tape piece 5D (see FIG. 3), and the tape piece 5D is not adhesive. It is practically preferable to form a portion that becomes. Further, as the material of the tape piece 5D, a pressure sensitive adhesive tape is preferable and has a strength that does not peel off from the peeling portion 9 when worn, and when pulled horizontally in a plane, the strength is at least 600 per inch width. It is preferred that it is ˜3000 grams, more preferably 1000-2000 grams.

To use the disposable diaper 1 of the present embodiment, as a pants-type diaper, through the waist opening,
It can be worn and used as shown in FIG. 2 by passing a leg through the leg opening. Further, as shown in FIG. 3, the tape piece 5D can be opened to the left and right to widen the waist opening 6A and used as a normal flat type diaper. Further, the disposable diaper 1 of the present embodiment can easily confirm the inside by removing the tape piece 5D from the peeling portion 9, and the joint band 5 fixedly joined can be easily torn in the longitudinal direction. Since it is not necessary to pull down the disposable diaper 1 to the feet even when the disposable diaper 1 is taken off, excrement does not stain the skin or clothes of the wearer. Also, after the used one is rolled and the inside is closed, the tape piece 5D
If fixed by, it can be discarded as it is.
That is, since the disposable diaper 1 of the present embodiment has the non-stretchable region 5C in the intermediate region of the bonding band 5, the bonding band 5 has elasticity and is difficult to tear.
So that it can be easily torn in the non-stretchable region 5C, and the non-stretchable region 5C is stretched when the joining band 5 is stretched.
The stress is relieved by and the joint pieces 5A, 5B come off,
It was designed so as not to break.

Next, the manufacturing method, which is a preferred method for manufacturing the disposable diaper of the present invention, will be described. As shown in FIG. 4, elastic portions are formed on the left and right side edges of the waist portion 6 in front of the diaper body 10. First joining piece 5A
And the elastic second joining pieces 5B at the left and right side edges of the waist portion 6'after the diaper body 10 respectively.
Are joined together, and then the first joining piece 5A and the second joining piece 5B are joined and fixed at their edge portions to form the non-stretchable region 5C. This is performed by connecting the waist portions 6 and 6'on their right and left sides via elastic joint bands 5, respectively. As a result, the left and right joint strips 5A on the ventral side and the left and right joint strips 5B on the back side are joined to each other to form a waist opening 6A and a pair of left and right leg openings 7A (FIG. 1). reference). The diaper body is usually manufactured by a known method.

The disposable diaper of the present invention is not limited to the above-mentioned embodiment, and for example, two or more tape pieces 5D 'may be installed as in the other embodiment shown in FIG. it can. In addition, like the other embodiment shown in FIG.
The elastic expansion / contraction member 8A may be provided inside the joining band 5 ′. At this time, it is preferable that the elastic expansion / contraction member 8A is provided over the entire length of the joining band 5 ′ in the extending direction and at least in a part in the width direction. Further, when an elastic elastic member is provided in the joint band like the elastic elastic member 8A, it is preferable to use a non-woven fabric type material having elasticity and air permeability.

[0023]

INDUSTRIAL APPLICABILITY The disposable diaper of the present invention is easy to wear, even when standing or lying down, or fluttering a leg, without imposing an unreasonable posture on the wearer. It is possible to wear it on the body, and it is possible to easily adjust the opening and check the excrement while wearing it, and moreover, it is possible to easily check the adjustment of the waist and the internal excretion. , It is possible to wrap the excrement and fix it with tape for disposal. Further, according to the method for producing a disposable diaper of the present invention, the above disposable diaper can be easily produced.

Therefore, the disposable diaper of the present invention has the following effects (1) to (3). When the wearer is standing, the joint portion is fastened to form a pants-type diaper, and when the wearer is lying down, the diaper can be used as a flat-type diaper. In the case of a pants-type diaper, an adjustable part is provided at the joint to allow adjustment, so there is enough room in the waist opening and leg openings so that you do not have to put an unreasonable posture while wearing your legs. It can be easily worn even if it is flapping. By peeling off the tape piece, you can easily check the internal excrement, peel off the joint part and remove it, or easily tear it in the vertical direction, so you can put the disposable diaper up to your feet. No need to pull down. If necessary, the tape pieces can be joined again to continue the use. When removing the diaper of the present invention, the excrement does not stain the wearer's skin or clothes, and the used one is rolled up and the inside is sealed and fixed with a tape piece. Can be wrapped and discarded.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of a disposable diaper of the present invention.

FIG. 2 is a state diagram when an infant wears the disposable diaper shown in FIG.

FIG. 3 is a partially cutaway plan view showing an aspect in which the diaper shown in FIG. 1 is developed.

FIG. 4 is a plan view of an intermediate product in the process of manufacturing the disposable diaper shown in FIG.

FIG. 5 is a view corresponding to FIG. 2, showing another embodiment of the disposable of the present invention.

FIG. 6 is a view corresponding to FIG. 2, showing another embodiment of the disposable of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disposable diaper 2 Topsheet 3 Backsheet 4 Absorber 5 Joining band 5A Joining piece 5B Joining piece 5C Non-expandable area 5D Tape piece 6 Waist part 6A Waist opening 7 Leg part 7A Leg opening 8 Elastic shrink member 9 Peeling part 10 Diaper body

Claims (3)

[Claims] 1. A liquid-permeable topsheet, a liquid-impermeable backsheet, an absorbent body interposed between these sheets, front and rear waist portions and left and right legs located around the absorbent body. And elastic waist members each of which forms a gather, and front and rear waist portions are connected to each other via elastic joint bands on the left and right sides thereof to form a waist opening and a leg opening. In the pants-type disposable diaper, the joining band extends from the waist opening to the leg opening, and at least one joining part of the joining band with the waist can be joined / peeled off. A piece is provided,
A disposable diaper characterized in that the joining portion is joined by a tape piece so as to be joined and peeled off, and the joining band has a non-stretchable region in an intermediate region thereof. 2. The disposable diaper according to claim 1, wherein the bonding band is made of a laminated sheet of a fiber assembly and a film. 3. The method for manufacturing the disposable diaper according to claim 1, wherein elastic first joining pieces are respectively provided on left and right side edge portions of the front waist portion, and the rear waist portion. The elastic second joint pieces are respectively joined to the left and right side edge portions of the first joint piece, and then the first joint piece and the second joint piece are joined and fixed at their edge portions, A method for manufacturing a disposable diaper, characterized in that the front and rear waist portions are connected to each other via stretchable joint bands on the left and right thereof.